ref: 011402a252450a6883f109a86e5dd7e24aa0d3a0
parent: 93839b636d0a1801950bf1ddf52e52cc12b6391a
parent: 7d50a792c1a90425e1972a1cfea2d0d61416297b
author: Jean-Marc Valin <jean-marc.valin@octasic.com>
date: Thu Apr 28 11:51:30 EDT 2011
Merge commit 'silk-repo/master'
--- /dev/null
+++ b/interface/SKP_Silk_SDK_API.h
@@ -1,0 +1,149 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef SKP_SILK_SDK_API_H
+#define SKP_SILK_SDK_API_H
+
+#include "SKP_Silk_control.h"
+#include "SKP_Silk_typedef.h"
+#include "SKP_Silk_errors.h"
+#include "entenc.h"
+#include "entdec.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#define SILK_MAX_FRAMES_PER_PACKET 3
+
+/* Struct for TOC (Table of Contents) */
+typedef struct {
+ SKP_int VADFlag; /* Voice activity for packet */
+ SKP_int VADFlags[ SILK_MAX_FRAMES_PER_PACKET ]; /* Voice activity for each frame in packet */
+ SKP_int inbandFECFlag; /* Flag indicating if packet contains in-band FEC */
+} SKP_Silk_TOC_struct;
+
+/****************************************/
+/* Encoder functions */
+/****************************************/
+
+/***********************************************/
+/* Get size in bytes of the Silk encoder state */
+/***********************************************/
+SKP_int SKP_Silk_SDK_Get_Encoder_Size( /* O: Returns error code */
+ SKP_int32 *encSizeBytes /* O: Number of bytes in SILK encoder state */
+);
+
+/*************************/
+/* Init or reset encoder */
+/*************************/
+SKP_int SKP_Silk_SDK_InitEncoder( /* O: Returns error code */
+ void *encState, /* I/O: State */
+ SKP_SILK_SDK_EncControlStruct *encStatus /* O: Encoder Status */
+);
+
+/***************************************/
+/* Read control structure from encoder */
+/***************************************/
+SKP_int SKP_Silk_SDK_QueryEncoder( /* O: Returns error code */
+ const void *encState, /* I: State */
+ SKP_SILK_SDK_EncControlStruct *encStatus /* O: Encoder Status */
+);
+
+/**************************/
+/* Encode frame with Silk */
+/**************************/
+/* Note: if prefillFlag is set, the input must contain 10 ms of audio, irrespective of what */
+/* encControl->payloadSize_ms is set to */
+SKP_int SKP_Silk_SDK_Encode( /* O: Returns error code */
+ void *encState, /* I/O: State */
+ SKP_SILK_SDK_EncControlStruct *encControl, /* I: Control status */
+ const SKP_int16 *samplesIn, /* I: Speech sample input vector */
+ SKP_int nSamplesIn, /* I: Number of samples in input vector */
+ ec_enc *psRangeEnc, /* I/O Compressor data structure */
+ SKP_int32 *nBytesOut, /* I/O: Number of bytes in payload (input: Max bytes) */
+ const SKP_int prefillFlag /* I: Flag to indicate prefilling buffers no coding */
+);
+
+/****************************************/
+/* Decoder functions */
+/****************************************/
+
+/***********************************************/
+/* Get size in bytes of the Silk decoder state */
+/***********************************************/
+SKP_int SKP_Silk_SDK_Get_Decoder_Size( /* O: Returns error code */
+ SKP_int32 *decSizeBytes /* O: Number of bytes in SILK decoder state */
+);
+
+/*************************/
+/* Init or Reset decoder */
+/*************************/
+SKP_int SKP_Silk_SDK_InitDecoder( /* O: Returns error code */
+ void *decState /* I/O: State */
+);
+
+/******************/
+/* Decode a frame */
+/******************/
+SKP_int SKP_Silk_SDK_Decode( /* O: Returns error code */
+ void* decState, /* I/O: State */
+ SKP_SILK_SDK_DecControlStruct* decControl, /* I/O: Control Structure */
+ SKP_int lostFlag, /* I: 0: no loss, 1 loss, 2 decode fec */
+ SKP_int newPacketFlag, /* I: Indicates first decoder call for this packet */
+ ec_dec *psRangeDec, /* I/O Compressor data structure */
+ SKP_int16 *samplesOut, /* O: Decoded output speech vector */
+ SKP_int32 *nSamplesOut /* O: Number of samples decoded */
+);
+
+/***************************************************************/
+/* Find Low Bit Rate Redundancy (LBRR) information in a packet */
+/***************************************************************/
+void SKP_Silk_SDK_search_for_LBRR(
+ const SKP_uint8 *inData, /* I: Encoded input vector */
+ const SKP_int16 nBytesIn, /* I: Number of input bytes */
+ SKP_int lost_offset, /* I: Offset from lost packet */
+ SKP_uint8 *LBRRData, /* O: LBRR payload */
+ SKP_int32 *nLBRRBytes /* O: Number of LBRR Bytes */
+);
+
+/**************************************/
+/* Get table of contents for a packet */
+/**************************************/
+SKP_int SKP_Silk_SDK_get_TOC(
+ const SKP_uint8 *payload, /* I Payload data */
+ const SKP_int nBytesIn, /* I: Number of input bytes */
+ const SKP_int nFramesPerPayload, /* I: Number of SILK frames per payload */
+ SKP_Silk_TOC_struct *Silk_TOC /* O: Type of content */
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+++ b/interface/SKP_Silk_control.h
@@ -1,0 +1,120 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef SKP_SILK_CONTROL_H
+#define SKP_SILK_CONTROL_H
+
+#include "SKP_Silk_typedef.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/* Decoder API flags */
+#define FLAG_DECODE_NORMAL 0
+#define FLAG_PACKET_LOST 1
+#define FLAG_DECODE_LBRR 2
+
+/***********************************************/
+/* Structure for controlling encoder operation */
+/***********************************************/
+typedef struct {
+ /* I: Number of channels; 1/2 */
+ SKP_int32 nChannels;
+
+ /* I: Input signal sampling rate in Hertz; 8000/12000/16000/24000/32000/44100/48000 */
+ SKP_int32 API_sampleRate;
+
+ /* I: Maximum internal sampling rate in Hertz; 8000/12000/16000 */
+ SKP_int32 maxInternalSampleRate;
+
+ /* I: Minimum internal sampling rate in Hertz; 8000/12000/16000 */
+ SKP_int32 minInternalSampleRate;
+
+ /* I: Soft request for internal sampling rate in Hertz; 8000/12000/16000 */
+ SKP_int32 desiredInternalSampleRate;
+
+ /* I: Number of samples per packet in milliseconds; 10/20/40/60 */
+ SKP_int payloadSize_ms;
+
+ /* I: Bitrate during active speech in bits/second; internally limited */
+ SKP_int32 bitRate;
+
+ /* I: Uplink packet loss in percent (0-100) */
+ SKP_int packetLossPercentage;
+
+ /* I: Complexity mode; 0 is lowest, 10 is highest complexity */
+ SKP_int complexity;
+
+ /* I: Flag to enable in-band Forward Error Correction (FEC); 0/1 */
+ SKP_int useInBandFEC;
+
+ /* I: Flag to enable discontinuous transmission (DTX); 0/1 */
+ SKP_int useDTX;
+
+ /* I: Flag to use constant bitrate */
+ SKP_int useCBR;
+
+ /* O: Internal sampling rate used, in Hertz; 8000/12000/16000 */
+ SKP_int32 internalSampleRate;
+
+ /* O: Flag that bandwidth switching is allowed (because low voice activity) */
+ SKP_int allowBandwidthSwitch;
+
+ /* O: Flag that SILK runs in WB mode without variable LP filter (use for switching between WB/SWB/FB) */
+ SKP_int inWBmodeWithoutVariableLP;
+} SKP_SILK_SDK_EncControlStruct;
+
+/**************************************************************************/
+/* Structure for controlling decoder operation and reading decoder status */
+/**************************************************************************/
+typedef struct {
+ /* I: Number of channels; 1/2 */
+ SKP_int32 nChannels;
+
+ /* I: Output signal sampling rate in Hertz; 8000/12000/16000/24000/32000/44100/48000 */
+ SKP_int32 API_sampleRate;
+
+ /* I: Number of samples per packet in milliseconds; 10/20/40/60 */
+ SKP_int payloadSize_ms;
+
+ /* I: Internal sampling rate used, in Hertz; 8000/12000/16000 */
+ SKP_int32 internalSampleRate;
+
+ /* O: Number of samples per frame */
+ SKP_int frameSize;
+
+ /* O: Frames per payload 1, 2, 3 */
+ SKP_int framesPerPayload;
+} SKP_SILK_SDK_DecControlStruct;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+++ b/interface/SKP_Silk_errors.h
@@ -1,0 +1,98 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef SKP_SILK_ERRORS_H
+#define SKP_SILK_ERRORS_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/******************/
+/* Error messages */
+/******************/
+#define SKP_SILK_NO_ERROR 0
+
+/**************************/
+/* Encoder error messages */
+/**************************/
+
+/* Input length is not a multiple of 10 ms, or length is longer than the packet length */
+#define SKP_SILK_ENC_INPUT_INVALID_NO_OF_SAMPLES -101
+
+/* Sampling frequency not 8000, 12000 or 16000 Hertz */
+#define SKP_SILK_ENC_FS_NOT_SUPPORTED -102
+
+/* Packet size not 10, 20, 40, or 60 ms */
+#define SKP_SILK_ENC_PACKET_SIZE_NOT_SUPPORTED -103
+
+/* Allocated payload buffer too short */
+#define SKP_SILK_ENC_PAYLOAD_BUF_TOO_SHORT -104
+
+/* Loss rate not between 0 and 100 percent */
+#define SKP_SILK_ENC_INVALID_LOSS_RATE -105
+
+/* Complexity setting not valid, use 0...10 */
+#define SKP_SILK_ENC_INVALID_COMPLEXITY_SETTING -106
+
+/* Inband FEC setting not valid, use 0 or 1 */
+#define SKP_SILK_ENC_INVALID_INBAND_FEC_SETTING -107
+
+/* DTX setting not valid, use 0 or 1 */
+#define SKP_SILK_ENC_INVALID_DTX_SETTING -108
+
+/* CBR setting not valid, use 0 or 1 */
+#define SKP_SILK_ENC_INVALID_CBR_SETTING -109
+
+/* Internal encoder error */
+#define SKP_SILK_ENC_INTERNAL_ERROR -110
+
+/* Internal encoder error */
+#define SKP_SILK_ENC_INVALID_NUMBER_OF_CHANNELS_ERROR -111
+
+/**************************/
+/* Decoder error messages */
+/**************************/
+
+/* Output sampling frequency lower than internal decoded sampling frequency */
+#define SKP_SILK_DEC_INVALID_SAMPLING_FREQUENCY -200
+
+/* Payload size exceeded the maximum allowed 1024 bytes */
+#define SKP_SILK_DEC_PAYLOAD_TOO_LARGE -201
+
+/* Payload has bit errors */
+#define SKP_SILK_DEC_PAYLOAD_ERROR -202
+
+/* Payload has bit errors */
+#define SKP_SILK_DEC_INVALID_FRAME_SIZE -203
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+++ b/interface/SKP_Silk_typedef.h
@@ -1,0 +1,99 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef _SKP_SILK_API_TYPDEF_H_
+#define _SKP_SILK_API_TYPDEF_H_
+
+#ifndef SKP_USE_DOUBLE_PRECISION_FLOATS
+#define SKP_USE_DOUBLE_PRECISION_FLOATS 0
+#endif
+
+#include <float.h>
+#if defined( __GNUC__ )
+#include <stdint.h>
+#endif
+
+#define SKP_int int /* used for counters etc; at least 16 bits */
+#define SKP_int64 long long
+#define SKP_int32 int
+#define SKP_int16 short
+#define SKP_int8 signed char
+
+#define SKP_uint unsigned int /* used for counters etc; at least 16 bits */
+#define SKP_uint64 unsigned long long
+#define SKP_uint32 unsigned int
+#define SKP_uint16 unsigned short
+#define SKP_uint8 unsigned char
+
+#define SKP_int_ptr_size intptr_t
+
+#if SKP_USE_DOUBLE_PRECISION_FLOATS
+# define SKP_float double
+# define SKP_float_MAX DBL_MAX
+#else
+# define SKP_float float
+# define SKP_float_MAX FLT_MAX
+#endif
+
+#define SKP_INLINE static __inline
+
+#ifdef _WIN32
+# define SKP_STR_CASEINSENSITIVE_COMPARE(x, y) _stricmp(x, y)
+#else
+# define SKP_STR_CASEINSENSITIVE_COMPARE(x, y) strcasecmp(x, y)
+#endif
+
+#define SKP_int64_MAX ((SKP_int64)0x7FFFFFFFFFFFFFFFLL) // 2^63 - 1
+#define SKP_int64_MIN ((SKP_int64)0x8000000000000000LL) // -2^63
+#define SKP_int32_MAX 0x7FFFFFFF // 2^31 - 1 = 2147483647
+#define SKP_int32_MIN ((SKP_int32)0x80000000) // -2^31 = -2147483648
+#define SKP_int16_MAX 0x7FFF // 2^15 - 1 = 32767
+#define SKP_int16_MIN ((SKP_int16)0x8000) // -2^15 = -32768
+#define SKP_int8_MAX 0x7F // 2^7 - 1 = 127
+#define SKP_int8_MIN ((SKP_int8)0x80) // -2^7 = -128
+
+#define SKP_uint32_MAX 0xFFFFFFFF // 2^32 - 1 = 4294967295
+#define SKP_uint32_MIN 0x00000000
+#define SKP_uint16_MAX 0xFFFF // 2^16 - 1 = 65535
+#define SKP_uint16_MIN 0x0000
+#define SKP_uint8_MAX 0xFF // 2^8 - 1 = 255
+#define SKP_uint8_MIN 0x00
+
+#define SKP_TRUE 1
+#define SKP_FALSE 0
+
+/* assertions */
+#if (defined _WIN32 && !defined _WINCE && !defined(__GNUC__) && !defined(NO_ASSERTS))
+# ifndef SKP_assert
+# include <crtdbg.h> /* ASSERTE() */
+# define SKP_assert(COND) _ASSERTE(COND)
+# endif
+#else
+# define SKP_assert(COND)
+#endif
+
+#endif
--- /dev/null
+++ b/interface/SKP_debug.h
@@ -1,0 +1,311 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef _SKP_DEBUG_H_
+#define _SKP_DEBUG_H_
+
+#ifdef _WIN32
+#define _CRT_SECURE_NO_DEPRECATE 1
+#endif
+
+#include "SKP_Silk_typedef.h"
+#include <stdio.h> /* file writing */
+#include <string.h> /* strcpy, strcmp */
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+unsigned long GetHighResolutionTime(void); /* O: time in usec*/
+
+/* make SKP_DEBUG dependent on compiler's _DEBUG */
+#if defined _WIN32
+ #ifdef _DEBUG
+ #define SKP_DEBUG 1
+ #else
+ #define SKP_DEBUG 0
+ #endif
+
+ /* overrule the above */
+ #if 0
+ // #define NO_ASSERTS
+ #undef SKP_DEBUG
+ #define SKP_DEBUG 1
+ #endif
+#else
+ #define SKP_DEBUG 0
+#endif
+
+/* Flag for using timers */
+#define SKP_TIC_TOC 0
+
+#if SKP_TIC_TOC
+
+#if (defined(_WIN32) || defined(_WINCE))
+#include <windows.h> /* timer */
+#pragma warning( disable : 4996 ) // stop bitching about strcpy in TIC()
+#else // Linux or Mac
+#include <sys/time.h>
+#endif
+
+/*********************************/
+/* timer functions for profiling */
+/*********************************/
+/* example: */
+/* */
+/* TIC(LPC) */
+/* do_LPC(in_vec, order, acoef); // do LPC analysis */
+/* TOC(LPC) */
+/* */
+/* and call the following just before exiting (from main) */
+/* */
+/* SKP_TimerSave("SKP_TimingData.txt"); */
+/* */
+/* results are now in SKP_TimingData.txt */
+
+void SKP_TimerSave(char *file_name);
+
+/* max number of timers (in different locations) */
+#define SKP_NUM_TIMERS_MAX 50
+/* max length of name tags in TIC(..), TOC(..) */
+#define SKP_NUM_TIMERS_MAX_TAG_LEN 30
+
+extern int SKP_Timer_nTimers;
+extern int SKP_Timer_depth_ctr;
+extern char SKP_Timer_tags[SKP_NUM_TIMERS_MAX][SKP_NUM_TIMERS_MAX_TAG_LEN];
+#ifdef _WIN32
+extern LARGE_INTEGER SKP_Timer_start[SKP_NUM_TIMERS_MAX];
+#else
+extern unsigned long SKP_Timer_start[SKP_NUM_TIMERS_MAX];
+#endif
+extern unsigned int SKP_Timer_cnt[SKP_NUM_TIMERS_MAX];
+extern SKP_int64 SKP_Timer_sum[SKP_NUM_TIMERS_MAX];
+extern SKP_int64 SKP_Timer_max[SKP_NUM_TIMERS_MAX];
+extern SKP_int64 SKP_Timer_min[SKP_NUM_TIMERS_MAX];
+extern SKP_int64 SKP_Timer_depth[SKP_NUM_TIMERS_MAX];
+
+/* WARNING: TIC()/TOC can measure only up to 0.1 seconds at a time */
+#ifdef _WIN32
+#define TIC(TAG_NAME) { \
+ static int init = 0; \
+ static int ID = -1; \
+ if( init == 0 ) \
+ { \
+ int k; \
+ init = 1; \
+ for( k = 0; k < SKP_Timer_nTimers; k++ ) { \
+ if( strcmp(SKP_Timer_tags[k], #TAG_NAME) == 0 ) { \
+ ID = k; \
+ break; \
+ } \
+ } \
+ if (ID == -1) { \
+ ID = SKP_Timer_nTimers; \
+ SKP_Timer_nTimers++; \
+ SKP_Timer_depth[ID] = SKP_Timer_depth_ctr; \
+ strcpy(SKP_Timer_tags[ID], #TAG_NAME); \
+ SKP_Timer_cnt[ID] = 0; \
+ SKP_Timer_sum[ID] = 0; \
+ SKP_Timer_min[ID] = 0xFFFFFFFF; \
+ SKP_Timer_max[ID] = 0; \
+ } \
+ } \
+ SKP_Timer_depth_ctr++; \
+ QueryPerformanceCounter(&SKP_Timer_start[ID]); \
+}
+#else
+#define TIC(TAG_NAME) { \
+ static int init = 0; \
+ static int ID = -1; \
+ if( init == 0 ) \
+ { \
+ int k; \
+ init = 1; \
+ for( k = 0; k < SKP_Timer_nTimers; k++ ) { \
+ if( strcmp(SKP_Timer_tags[k], #TAG_NAME) == 0 ) { \
+ ID = k; \
+ break; \
+ } \
+ } \
+ if (ID == -1) { \
+ ID = SKP_Timer_nTimers; \
+ SKP_Timer_nTimers++; \
+ SKP_Timer_depth[ID] = SKP_Timer_depth_ctr; \
+ strcpy(SKP_Timer_tags[ID], #TAG_NAME); \
+ SKP_Timer_cnt[ID] = 0; \
+ SKP_Timer_sum[ID] = 0; \
+ SKP_Timer_min[ID] = 0xFFFFFFFF; \
+ SKP_Timer_max[ID] = 0; \
+ } \
+ } \
+ SKP_Timer_depth_ctr++; \
+ SKP_Timer_start[ID] = GetHighResolutionTime(); \
+}
+#endif
+
+#ifdef _WIN32
+#define TOC(TAG_NAME) { \
+ LARGE_INTEGER lpPerformanceCount; \
+ static int init = 0; \
+ static int ID = 0; \
+ if( init == 0 ) \
+ { \
+ int k; \
+ init = 1; \
+ for( k = 0; k < SKP_Timer_nTimers; k++ ) { \
+ if( strcmp(SKP_Timer_tags[k], #TAG_NAME) == 0 ) { \
+ ID = k; \
+ break; \
+ } \
+ } \
+ } \
+ QueryPerformanceCounter(&lpPerformanceCount); \
+ lpPerformanceCount.QuadPart -= SKP_Timer_start[ID].QuadPart; \
+ if((lpPerformanceCount.QuadPart < 100000000) && \
+ (lpPerformanceCount.QuadPart >= 0)) { \
+ SKP_Timer_cnt[ID]++; \
+ SKP_Timer_sum[ID] += lpPerformanceCount.QuadPart; \
+ if( lpPerformanceCount.QuadPart > SKP_Timer_max[ID] ) \
+ SKP_Timer_max[ID] = lpPerformanceCount.QuadPart; \
+ if( lpPerformanceCount.QuadPart < SKP_Timer_min[ID] ) \
+ SKP_Timer_min[ID] = lpPerformanceCount.QuadPart; \
+ } \
+ SKP_Timer_depth_ctr--; \
+}
+#else
+#define TOC(TAG_NAME) { \
+ unsigned long endTime; \
+ static int init = 0; \
+ static int ID = 0; \
+ if( init == 0 ) \
+ { \
+ int k; \
+ init = 1; \
+ for( k = 0; k < SKP_Timer_nTimers; k++ ) { \
+ if( strcmp(SKP_Timer_tags[k], #TAG_NAME) == 0 ) { \
+ ID = k; \
+ break; \
+ } \
+ } \
+ } \
+ endTime = GetHighResolutionTime(); \
+ endTime -= SKP_Timer_start[ID]; \
+ if((endTime < 100000000) && \
+ (endTime >= 0)) { \
+ SKP_Timer_cnt[ID]++; \
+ SKP_Timer_sum[ID] += endTime; \
+ if( endTime > SKP_Timer_max[ID] ) \
+ SKP_Timer_max[ID] = endTime; \
+ if( endTime < SKP_Timer_min[ID] ) \
+ SKP_Timer_min[ID] = endTime; \
+ } \
+ SKP_Timer_depth_ctr--; \
+}
+#endif
+
+#else /* SKP_TIC_TOC */
+
+/* define macros as empty strings */
+#define TIC(TAG_NAME)
+#define TOC(TAG_NAME)
+#define SKP_TimerSave(FILE_NAME)
+
+#endif /* SKP_TIC_TOC */
+
+
+
+#if SKP_DEBUG
+/************************************/
+/* write data to file for debugging */
+/************************************/
+/* opens an empty file if this file has not yet been open, then writes to the file and closes it */
+/* if file has been open previously it is opened again and the fwrite is appending, finally it is closed */
+#define SAVE_DATA( FILE_NAME, DATA_PTR, N_BYTES ) { \
+ static SKP_int32 init = 0; \
+ FILE *fp; \
+ if (init == 0) { \
+ init = 1; \
+ fp = fopen(#FILE_NAME, "wb"); \
+ } else { \
+ fp = fopen(#FILE_NAME, "ab+"); \
+ } \
+ fwrite((DATA_PTR), (N_BYTES), 1, fp); \
+ fclose(fp); \
+}
+
+/* Example: DEBUG_STORE_DATA(testfile.pcm, &RIN[0], 160*sizeof(SKP_int16)); */
+
+#if 0
+/* Ensure that everything is written to files when an assert breaks */
+#define DEBUG_STORE_DATA(FILE_NAME, DATA_PTR, N_BYTES) SAVE_DATA(FILE_NAME, DATA_PTR, N_BYTES)
+#define DEBUG_STORE_CLOSE_FILES
+
+#else
+
+#define SKP_NUM_STORES_MAX 100
+extern FILE *SKP_debug_store_fp[ SKP_NUM_STORES_MAX ];
+extern int SKP_debug_store_count;
+
+/* Faster way of storing the data */
+#define DEBUG_STORE_DATA( FILE_NAME, DATA_PTR, N_BYTES ) { \
+ static SKP_int init = 0, cnt = 0; \
+ static FILE **fp; \
+ if (init == 0) { \
+ init = 1; \
+ cnt = SKP_debug_store_count++; \
+ SKP_debug_store_fp[ cnt ] = fopen(#FILE_NAME, "wb"); \
+ } \
+ fwrite((DATA_PTR), (N_BYTES), 1, SKP_debug_store_fp[ cnt ]); \
+}
+
+/* Call this at the end of main() */
+#define DEBUG_STORE_CLOSE_FILES { \
+ SKP_int i; \
+ for( i = 0; i < SKP_debug_store_count; i++ ) { \
+ fclose( SKP_debug_store_fp[ i ] ); \
+ } \
+}
+#endif
+
+/* micro sec */
+#define SKP_GETTIME(void) time = (SKP_int64) GetHighResolutionTime();
+
+#else /* SKP_DEBUG */
+
+/* define macros as empty strings */
+#define DEBUG_STORE_DATA(FILE_NAME, DATA_PTR, N_BYTES)
+#define SAVE_DATA(FILE_NAME, DATA_PTR, N_BYTES)
+#define DEBUG_STORE_CLOSE_FILES
+
+#endif /* SKP_DEBUG */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SKP_DEBUG_H_ */
--- /dev/null
+++ b/src_FIX/SKP_Silk_LTP_analysis_filter_FIX.c
@@ -1,0 +1,81 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FIX.h"
+
+void SKP_Silk_LTP_analysis_filter_FIX(
+ SKP_int16 *LTP_res, /* O: LTP residual signal of length MAX_NB_SUBFR * ( pre_length + subfr_length ) */
+ const SKP_int16 *x, /* I: Pointer to input signal with at least max( pitchL ) preceeding samples */
+ const SKP_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ],/* I: LTP_ORDER LTP coefficients for each MAX_NB_SUBFR subframe */
+ const SKP_int pitchL[ MAX_NB_SUBFR ], /* I: Pitch lag, one for each subframe */
+ const SKP_int32 invGains_Q16[ MAX_NB_SUBFR ], /* I: Inverse quantization gains, one for each subframe */
+ const SKP_int subfr_length, /* I: Length of each subframe */
+ const SKP_int nb_subfr, /* I: Number of subframes */
+ const SKP_int pre_length /* I: Length of the preceeding samples starting at &x[0] for each subframe */
+)
+{
+ const SKP_int16 *x_ptr, *x_lag_ptr;
+ SKP_int16 Btmp_Q14[ LTP_ORDER ];
+ SKP_int16 *LTP_res_ptr;
+ SKP_int k, i, j;
+ SKP_int32 LTP_est;
+
+ x_ptr = x;
+ LTP_res_ptr = LTP_res;
+ for( k = 0; k < nb_subfr; k++ ) {
+
+ x_lag_ptr = x_ptr - pitchL[ k ];
+ for( i = 0; i < LTP_ORDER; i++ ) {
+ Btmp_Q14[ i ] = LTPCoef_Q14[ k * LTP_ORDER + i ];
+ }
+
+ /* LTP analysis FIR filter */
+ for( i = 0; i < subfr_length + pre_length; i++ ) {
+ LTP_res_ptr[ i ] = x_ptr[ i ];
+
+ /* Long-term prediction */
+ LTP_est = SKP_SMULBB( x_lag_ptr[ LTP_ORDER / 2 ], Btmp_Q14[ 0 ] );
+ for( j = 1; j < LTP_ORDER; j++ ) {
+ LTP_est = SKP_SMLABB_ovflw( LTP_est, x_lag_ptr[ LTP_ORDER / 2 - j ], Btmp_Q14[ j ] );
+ }
+ LTP_est = SKP_RSHIFT_ROUND( LTP_est, 14 ); // round and -> Q0
+
+ /* Subtract long-term prediction */
+ LTP_res_ptr[ i ] = ( SKP_int16 )SKP_SAT16( ( SKP_int32 )x_ptr[ i ] - LTP_est );
+
+ /* Scale residual */
+ LTP_res_ptr[ i ] = SKP_SMULWB( invGains_Q16[ k ], LTP_res_ptr[ i ] );
+
+ x_lag_ptr++;
+ }
+
+ /* Update pointers */
+ LTP_res_ptr += subfr_length + pre_length;
+ x_ptr += subfr_length;
+ }
+}
+
--- /dev/null
+++ b/src_FIX/SKP_Silk_LTP_scale_ctrl_FIX.c
@@ -1,0 +1,52 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FIX.h"
+
+void SKP_Silk_LTP_scale_ctrl_FIX(
+ SKP_Silk_encoder_state_FIX *psEnc, /* I/O encoder state FIX */
+ SKP_Silk_encoder_control_FIX *psEncCtrl /* I/O encoder control FIX */
+)
+{
+ SKP_int round_loss;
+
+ /* 1st order high-pass filter */
+ psEnc->HPLTPredCodGain_Q7 = SKP_max_int( psEncCtrl->LTPredCodGain_Q7 - SKP_RSHIFT( psEnc->prevLTPredCodGain_Q7, 1 ), 0 )
+ + SKP_RSHIFT( psEnc->HPLTPredCodGain_Q7, 1 );
+ psEnc->prevLTPredCodGain_Q7 = psEncCtrl->LTPredCodGain_Q7;
+
+ /* Only scale if first frame in packet */
+ if( psEnc->sCmn.nFramesAnalyzed == 0 ) {
+ round_loss = psEnc->sCmn.PacketLoss_perc + psEnc->sCmn.nFramesPerPacket - 1;
+ psEnc->sCmn.indices.LTP_scaleIndex = (SKP_int8)SKP_LIMIT(
+ SKP_SMULWB( SKP_SMULBB( round_loss, psEnc->HPLTPredCodGain_Q7 ), SKP_FIX_CONST( 0.1, 9 ) ), 0, 2 );
+ } else {
+ /* Default is minimum scaling */
+ psEnc->sCmn.indices.LTP_scaleIndex = 0;
+ }
+ psEncCtrl->LTP_scale_Q14 = SKP_Silk_LTPScales_table_Q14[ psEnc->sCmn.indices.LTP_scaleIndex ];
+}
--- /dev/null
+++ b/src_FIX/SKP_Silk_corrMatrix_FIX.c
@@ -1,0 +1,152 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/**********************************************************************
+ * Correlation Matrix Computations for LS estimate.
+ **********************************************************************/
+
+#include "SKP_Silk_main_FIX.h"
+
+/* Calculates correlation vector X'*t */
+void SKP_Silk_corrVector_FIX(
+ const SKP_int16 *x, /* I x vector [L + order - 1] used to form data matrix X */
+ const SKP_int16 *t, /* I target vector [L] */
+ const SKP_int L, /* I Length of vectors */
+ const SKP_int order, /* I Max lag for correlation */
+ SKP_int32 *Xt, /* O Pointer to X'*t correlation vector [order] */
+ const SKP_int rshifts /* I Right shifts of correlations */
+)
+{
+ SKP_int lag, i;
+ const SKP_int16 *ptr1, *ptr2;
+ SKP_int32 inner_prod;
+
+ ptr1 = &x[ order - 1 ]; /* Points to first sample of column 0 of X: X[:,0] */
+ ptr2 = t;
+ /* Calculate X'*t */
+ if( rshifts > 0 ) {
+ /* Right shifting used */
+ for( lag = 0; lag < order; lag++ ) {
+ inner_prod = 0;
+ for( i = 0; i < L; i++ ) {
+ inner_prod += SKP_RSHIFT32( SKP_SMULBB( ptr1[ i ], ptr2[i] ), rshifts );
+ }
+ Xt[ lag ] = inner_prod; /* X[:,lag]'*t */
+ ptr1--; /* Go to next column of X */
+ }
+ } else {
+ SKP_assert( rshifts == 0 );
+ for( lag = 0; lag < order; lag++ ) {
+ Xt[ lag ] = SKP_Silk_inner_prod_aligned( ptr1, ptr2, L ); /* X[:,lag]'*t */
+ ptr1--; /* Go to next column of X */
+ }
+ }
+}
+
+/* Calculates correlation matrix X'*X */
+void SKP_Silk_corrMatrix_FIX(
+ const SKP_int16 *x, /* I x vector [L + order - 1] used to form data matrix X */
+ const SKP_int L, /* I Length of vectors */
+ const SKP_int order, /* I Max lag for correlation */
+ const SKP_int head_room, /* I Desired headroom */
+ SKP_int32 *XX, /* O Pointer to X'*X correlation matrix [ order x order ]*/
+ SKP_int *rshifts /* I/O Right shifts of correlations */
+)
+{
+ SKP_int i, j, lag, rshifts_local, head_room_rshifts;
+ SKP_int32 energy;
+ const SKP_int16 *ptr1, *ptr2;
+
+ /* Calculate energy to find shift used to fit in 32 bits */
+ SKP_Silk_sum_sqr_shift( &energy, &rshifts_local, x, L + order - 1 );
+ /* Add shifts to get the desired head room */
+ head_room_rshifts = SKP_max( head_room - SKP_Silk_CLZ32( energy ), 0 );
+
+ energy = SKP_RSHIFT32( energy, head_room_rshifts );
+ rshifts_local += head_room_rshifts;
+
+ /* Calculate energy of first column (0) of X: X[:,0]'*X[:,0] */
+ /* Remove contribution of first order - 1 samples */
+ for( i = 0; i < order - 1; i++ ) {
+ energy -= SKP_RSHIFT32( SKP_SMULBB( x[ i ], x[ i ] ), rshifts_local );
+ }
+ if( rshifts_local < *rshifts ) {
+ /* Adjust energy */
+ energy = SKP_RSHIFT32( energy, *rshifts - rshifts_local );
+ rshifts_local = *rshifts;
+ }
+
+ /* Calculate energy of remaining columns of X: X[:,j]'*X[:,j] */
+ /* Fill out the diagonal of the correlation matrix */
+ matrix_ptr( XX, 0, 0, order ) = energy;
+ ptr1 = &x[ order - 1 ]; /* First sample of column 0 of X */
+ for( j = 1; j < order; j++ ) {
+ energy = SKP_SUB32( energy, SKP_RSHIFT32( SKP_SMULBB( ptr1[ L - j ], ptr1[ L - j ] ), rshifts_local ) );
+ energy = SKP_ADD32( energy, SKP_RSHIFT32( SKP_SMULBB( ptr1[ -j ], ptr1[ -j ] ), rshifts_local ) );
+ matrix_ptr( XX, j, j, order ) = energy;
+ }
+
+ ptr2 = &x[ order - 2 ]; /* First sample of column 1 of X */
+ /* Calculate the remaining elements of the correlation matrix */
+ if( rshifts_local > 0 ) {
+ /* Right shifting used */
+ for( lag = 1; lag < order; lag++ ) {
+ /* Inner product of column 0 and column lag: X[:,0]'*X[:,lag] */
+ energy = 0;
+ for( i = 0; i < L; i++ ) {
+ energy += SKP_RSHIFT32( SKP_SMULBB( ptr1[ i ], ptr2[i] ), rshifts_local );
+ }
+ /* Calculate remaining off diagonal: X[:,j]'*X[:,j + lag] */
+ matrix_ptr( XX, lag, 0, order ) = energy;
+ matrix_ptr( XX, 0, lag, order ) = energy;
+ for( j = 1; j < ( order - lag ); j++ ) {
+ energy = SKP_SUB32( energy, SKP_RSHIFT32( SKP_SMULBB( ptr1[ L - j ], ptr2[ L - j ] ), rshifts_local ) );
+ energy = SKP_ADD32( energy, SKP_RSHIFT32( SKP_SMULBB( ptr1[ -j ], ptr2[ -j ] ), rshifts_local ) );
+ matrix_ptr( XX, lag + j, j, order ) = energy;
+ matrix_ptr( XX, j, lag + j, order ) = energy;
+ }
+ ptr2--; /* Update pointer to first sample of next column (lag) in X */
+ }
+ } else {
+ for( lag = 1; lag < order; lag++ ) {
+ /* Inner product of column 0 and column lag: X[:,0]'*X[:,lag] */
+ energy = SKP_Silk_inner_prod_aligned( ptr1, ptr2, L );
+ matrix_ptr( XX, lag, 0, order ) = energy;
+ matrix_ptr( XX, 0, lag, order ) = energy;
+ /* Calculate remaining off diagonal: X[:,j]'*X[:,j + lag] */
+ for( j = 1; j < ( order - lag ); j++ ) {
+ energy = SKP_SUB32( energy, SKP_SMULBB( ptr1[ L - j ], ptr2[ L - j ] ) );
+ energy = SKP_SMLABB( energy, ptr1[ -j ], ptr2[ -j ] );
+ matrix_ptr( XX, lag + j, j, order ) = energy;
+ matrix_ptr( XX, j, lag + j, order ) = energy;
+ }
+ ptr2--;/* Update pointer to first sample of next column (lag) in X */
+ }
+ }
+ *rshifts = rshifts_local;
+}
+
--- /dev/null
+++ b/src_FIX/SKP_Silk_encode_frame_FIX.c
@@ -1,0 +1,301 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FIX.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+/****************/
+/* Encode frame */
+/****************/
+SKP_int SKP_Silk_encode_frame_FIX(
+ SKP_Silk_encoder_state_FIX *psEnc, /* I/O Encoder state FIX */
+ SKP_int32 *pnBytesOut, /* O Number of payload bytes */
+ ec_enc *psRangeEnc /* I/O compressor data structure */
+)
+{
+ SKP_Silk_encoder_control_FIX sEncCtrl;
+ SKP_int ret = 0;
+ SKP_int16 *x_frame, *res_pitch_frame;
+ SKP_int16 xfw[ MAX_FRAME_LENGTH ];
+ SKP_int16 res_pitch[ 2 * MAX_FRAME_LENGTH + LA_PITCH_MAX ];
+
+TIC(ENCODE_FRAME)
+
+ psEnc->sCmn.indices.Seed = psEnc->sCmn.frameCounter++ & 3;
+
+ /**************************************************************/
+ /* Setup Input Pointers, and insert frame in input buffer */
+ /*************************************************************/
+ /* pointers aligned with start of frame to encode */
+ x_frame = psEnc->x_buf + psEnc->sCmn.ltp_mem_length; /* start of frame to encode */
+ res_pitch_frame = res_pitch + psEnc->sCmn.ltp_mem_length; /* start of pitch LPC residual frame */
+
+ /****************************/
+ /* Voice Activity Detection */
+ /****************************/
+TIC(VAD)
+ ret = SKP_Silk_VAD_GetSA_Q8( &psEnc->sCmn, psEnc->sCmn.inputBuf );
+TOC(VAD)
+
+ /**************************************************/
+ /* Convert speech activity into VAD and DTX flags */
+ /**************************************************/
+ if( psEnc->sCmn.nFramesAnalyzed == 0 ) {
+ psEnc->sCmn.inDTX = psEnc->sCmn.useDTX;
+ }
+ if( psEnc->sCmn.speech_activity_Q8 < SKP_FIX_CONST( SPEECH_ACTIVITY_DTX_THRES, 8 ) ) {
+ psEnc->sCmn.indices.signalType = TYPE_NO_VOICE_ACTIVITY;
+ psEnc->sCmn.noSpeechCounter++;
+ if( psEnc->sCmn.noSpeechCounter < NB_SPEECH_FRAMES_BEFORE_DTX ) {
+ psEnc->sCmn.inDTX = 0;
+ } else if( psEnc->sCmn.noSpeechCounter > MAX_CONSECUTIVE_DTX + NB_SPEECH_FRAMES_BEFORE_DTX ) {
+ psEnc->sCmn.noSpeechCounter = NB_SPEECH_FRAMES_BEFORE_DTX;
+ psEnc->sCmn.inDTX = 0;
+ }
+ psEnc->sCmn.VAD_flags[ psEnc->sCmn.nFramesAnalyzed ] = 0;
+ } else {
+ psEnc->sCmn.noSpeechCounter = 0;
+ psEnc->sCmn.inDTX = 0;
+ psEnc->sCmn.indices.signalType = TYPE_UNVOICED;
+ psEnc->sCmn.VAD_flags[ psEnc->sCmn.nFramesAnalyzed ] = 1;
+ }
+
+ /*******************************************/
+ /* High-pass filtering of the input signal */
+ /*******************************************/
+TIC(HP_IN)
+ SKP_Silk_HP_variable_cutoff( &psEnc->sCmn, x_frame + LA_SHAPE_MS * psEnc->sCmn.fs_kHz, psEnc->sCmn.inputBuf, psEnc->sCmn.frame_length );
+TOC(HP_IN)
+
+ /* Ensure smooth bandwidth transitions */
+ SKP_Silk_LP_variable_cutoff( &psEnc->sCmn.sLP, x_frame + LA_SHAPE_MS * psEnc->sCmn.fs_kHz, psEnc->sCmn.frame_length );
+
+ /*****************************************/
+ /* Find pitch lags, initial LPC analysis */
+ /*****************************************/
+TIC(FIND_PITCH)
+ SKP_Silk_find_pitch_lags_FIX( psEnc, &sEncCtrl, res_pitch, x_frame );
+TOC(FIND_PITCH)
+
+ /************************/
+ /* Noise shape analysis */
+ /************************/
+TIC(NOISE_SHAPE_ANALYSIS)
+ SKP_Silk_noise_shape_analysis_FIX( psEnc, &sEncCtrl, res_pitch_frame, x_frame );
+TOC(NOISE_SHAPE_ANALYSIS)
+
+ /*****************************************/
+ /* Prefiltering for noise shaper */
+ /*****************************************/
+TIC(PREFILTER)
+ SKP_Silk_prefilter_FIX( psEnc, &sEncCtrl, xfw, x_frame );
+TOC(PREFILTER)
+
+ /***************************************************/
+ /* Find linear prediction coefficients (LPC + LTP) */
+ /***************************************************/
+TIC(FIND_PRED_COEF)
+ SKP_Silk_find_pred_coefs_FIX( psEnc, &sEncCtrl, res_pitch, x_frame );
+TOC(FIND_PRED_COEF)
+
+ /****************************************/
+ /* Process gains */
+ /****************************************/
+TIC(PROCESS_GAINS)
+ SKP_Silk_process_gains_FIX( psEnc, &sEncCtrl );
+TOC(PROCESS_GAINS)
+
+ /****************************************/
+ /* Low Bitrate Redundant Encoding */
+ /****************************************/
+TIC(LBRR)
+ SKP_Silk_LBRR_encode_FIX( psEnc, &sEncCtrl, xfw );
+TOC(LBRR)
+
+ /*****************************************/
+ /* Noise shaping quantization */
+ /*****************************************/
+TIC(NSQ)
+ if( psEnc->sCmn.nStatesDelayedDecision > 1 || psEnc->sCmn.warping_Q16 > 0 ) {
+ SKP_Silk_NSQ_del_dec( &psEnc->sCmn, &psEnc->sCmn.sNSQ, &psEnc->sCmn.indices, xfw, psEnc->sCmn.pulses,
+ sEncCtrl.PredCoef_Q12[ 0 ], sEncCtrl.LTPCoef_Q14, sEncCtrl.AR2_Q13, sEncCtrl.HarmShapeGain_Q14,
+ sEncCtrl.Tilt_Q14, sEncCtrl.LF_shp_Q14, sEncCtrl.Gains_Q16, sEncCtrl.pitchL, sEncCtrl.Lambda_Q10, sEncCtrl.LTP_scale_Q14 );
+ } else {
+ SKP_Silk_NSQ( &psEnc->sCmn, &psEnc->sCmn.sNSQ, &psEnc->sCmn.indices, xfw, psEnc->sCmn.pulses,
+ sEncCtrl.PredCoef_Q12[ 0 ], sEncCtrl.LTPCoef_Q14, sEncCtrl.AR2_Q13, sEncCtrl.HarmShapeGain_Q14,
+ sEncCtrl.Tilt_Q14, sEncCtrl.LF_shp_Q14, sEncCtrl.Gains_Q16, sEncCtrl.pitchL, sEncCtrl.Lambda_Q10, sEncCtrl.LTP_scale_Q14 );
+ }
+TOC(NSQ)
+
+ /* Update input buffer */
+ SKP_memmove( psEnc->x_buf, &psEnc->x_buf[ psEnc->sCmn.frame_length ],
+ ( psEnc->sCmn.ltp_mem_length + LA_SHAPE_MS * psEnc->sCmn.fs_kHz ) * sizeof( SKP_int16 ) );
+
+ /* Parameters needed for next frame */
+ psEnc->sCmn.prevLag = sEncCtrl.pitchL[ psEnc->sCmn.nb_subfr - 1 ];
+ psEnc->sCmn.prevSignalType = psEnc->sCmn.indices.signalType;
+
+ /* Exit without entropy coding */
+ if( psEnc->sCmn.prefillFlag ) {
+ /* No payload */
+ *pnBytesOut = 0;
+ return ret;
+ }
+
+ /****************************************/
+ /* Encode Parameters */
+ /****************************************/
+TIC(ENCODE_PARAMS)
+ SKP_Silk_encode_indices( &psEnc->sCmn, psRangeEnc, psEnc->sCmn.nFramesAnalyzed, 0 );
+TOC(ENCODE_PARAMS)
+
+ /****************************************/
+ /* Encode Excitation Signal */
+ /****************************************/
+TIC(ENCODE_PULSES)
+ SKP_Silk_encode_pulses( psRangeEnc, psEnc->sCmn.indices.signalType, psEnc->sCmn.indices.quantOffsetType,
+ psEnc->sCmn.pulses, psEnc->sCmn.frame_length );
+TOC(ENCODE_PULSES)
+
+ /****************************************/
+ /* Finalize payload */
+ /****************************************/
+ psEnc->sCmn.first_frame_after_reset = 0;
+ if( ++psEnc->sCmn.nFramesAnalyzed >= psEnc->sCmn.nFramesPerPacket ) {
+ /* Payload size */
+ *pnBytesOut = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
+
+ /* Reset the number of frames in payload buffer */
+ psEnc->sCmn.nFramesAnalyzed = 0;
+ } else {
+ /* No payload this time */
+ *pnBytesOut = 0;
+ }
+TOC(ENCODE_FRAME)
+
+#ifdef SAVE_ALL_INTERNAL_DATA
+ {
+ SKP_float tmp[ MAX_NB_SUBFR * LTP_ORDER ];
+ int i;
+ DEBUG_STORE_DATA( xf.dat, x_frame + LA_SHAPE_MS * psEnc->sCmn.fs_kHz, psEnc->sCmn.frame_length * sizeof( SKP_int16 ) );
+ DEBUG_STORE_DATA( xfw.dat, xfw, psEnc->sCmn.frame_length * sizeof( SKP_int16 ) );
+ DEBUG_STORE_DATA( pitchL.dat, sEncCtrl.pitchL, psEnc->sCmn.nb_subfr * sizeof( SKP_int ) );
+ for( i = 0; i < psEnc->sCmn.nb_subfr * LTP_ORDER; i++ ) {
+ tmp[ i ] = (SKP_float)sEncCtrl.LTPCoef_Q14[ i ] / 16384.0f;
+ }
+ DEBUG_STORE_DATA( pitchG_quantized.dat, tmp, psEnc->sCmn.nb_subfr * LTP_ORDER * sizeof( SKP_float ) );
+ for( i = 0; i <psEnc->sCmn.predictLPCOrder; i++ ) {
+ tmp[ i ] = (SKP_float)sEncCtrl.PredCoef_Q12[ 1 ][ i ] / 4096.0f;
+ }
+ DEBUG_STORE_DATA( PredCoef.dat, tmp, psEnc->sCmn.predictLPCOrder * sizeof( SKP_float ) );
+
+ tmp[ 0 ] = (SKP_float)sEncCtrl.LTPredCodGain_Q7 / 128.0f;
+ DEBUG_STORE_DATA( LTPredCodGain.dat, tmp, sizeof( SKP_float ) );
+ tmp[ 0 ] = (SKP_float)psEnc->LTPCorr_Q15 / 32768.0f;
+ DEBUG_STORE_DATA( LTPcorr.dat, tmp, sizeof( SKP_float ) );
+ tmp[ 0 ] = (SKP_float)psEnc->sCmn.input_tilt_Q15 / 32768.0f;
+ DEBUG_STORE_DATA( tilt.dat, tmp, sizeof( SKP_float ) );
+ for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
+ tmp[ i ] = (SKP_float)sEncCtrl.Gains_Q16[ i ] / 65536.0f;
+ }
+ DEBUG_STORE_DATA( gains.dat, tmp, psEnc->sCmn.nb_subfr * sizeof( SKP_float ) );
+ DEBUG_STORE_DATA( gains_indices.dat, &psEnc->sCmn.indices.GainsIndices, psEnc->sCmn.nb_subfr * sizeof( SKP_int ) );
+ tmp[ 0 ] = (SKP_float)sEncCtrl.current_SNR_dB_Q7 / 128.0f;
+ DEBUG_STORE_DATA( current_SNR_db.dat, tmp, sizeof( SKP_float ) );
+ DEBUG_STORE_DATA( quantOffsetType.dat, &psEnc->sCmn.indices.quantOffsetType, sizeof( SKP_int ) );
+ tmp[ 0 ] = (SKP_float)psEnc->sCmn.speech_activity_Q8 / 256.0f;
+ DEBUG_STORE_DATA( speech_activity.dat, tmp, sizeof( SKP_float ) );
+ for( i = 0; i < VAD_N_BANDS; i++ ) {
+ tmp[ i ] = (SKP_float)psEnc->sCmn.input_quality_bands_Q15[ i ] / 32768.0f;
+ }
+ DEBUG_STORE_DATA( input_quality_bands.dat, tmp, VAD_N_BANDS * sizeof( SKP_float ) );
+ DEBUG_STORE_DATA( signalType.dat, &psEnc->sCmn.indices.signalType, sizeof( SKP_int8) );
+ DEBUG_STORE_DATA( lag_index.dat, &psEnc->sCmn.indices.lagIndex, sizeof( SKP_int16 ) );
+ DEBUG_STORE_DATA( contour_index.dat, &psEnc->sCmn.indices.contourIndex, sizeof( SKP_int8 ) );
+ DEBUG_STORE_DATA( per_index.dat, &psEnc->sCmn.indices.PERIndex, sizeof( SKP_int8) );
+ }
+#endif
+ return ret;
+}
+
+/* Low-Bitrate Redundancy (LBRR) encoding. Reuse all parameters but encode excitation at lower bitrate */
+void SKP_Silk_LBRR_encode_FIX(
+ SKP_Silk_encoder_state_FIX *psEnc, /* I/O Pointer to Silk FIX encoder state */
+ SKP_Silk_encoder_control_FIX *psEncCtrl, /* I/O Pointer to Silk FIX encoder control struct */
+ const SKP_int16 xfw[] /* I Input signal */
+)
+{
+ SKP_int32 TempGains_Q16[ MAX_NB_SUBFR ];
+ SideInfoIndices *psIndices_LBRR = &psEnc->sCmn.indices_LBRR[ psEnc->sCmn.nFramesAnalyzed ];
+ SKP_Silk_nsq_state sNSQ_LBRR;
+
+ /*******************************************/
+ /* Control use of inband LBRR */
+ /*******************************************/
+ if( psEnc->sCmn.LBRR_enabled && psEnc->sCmn.speech_activity_Q8 > SKP_FIX_CONST( LBRR_SPEECH_ACTIVITY_THRES, 8 ) ) {
+ psEnc->sCmn.LBRR_flags[ psEnc->sCmn.nFramesAnalyzed ] = 1;
+
+ /* Copy noise shaping quantizer state and quantization indices from regular encoding */
+ SKP_memcpy( &sNSQ_LBRR, &psEnc->sCmn.sNSQ, sizeof( SKP_Silk_nsq_state ) );
+ SKP_memcpy( psIndices_LBRR, &psEnc->sCmn.indices, sizeof( SideInfoIndices ) );
+
+ /* Save original gains */
+ SKP_memcpy( TempGains_Q16, psEncCtrl->Gains_Q16, psEnc->sCmn.nb_subfr * sizeof( SKP_int32 ) );
+
+ if( psEnc->sCmn.nFramesAnalyzed == 0 || psEnc->sCmn.LBRR_flags[ psEnc->sCmn.nFramesAnalyzed - 1 ] == 0 ) {
+ /* First frame in packet or previous frame not LBRR coded */
+ psEnc->sCmn.LBRRprevLastGainIndex = psEnc->sShape.LastGainIndex;
+
+ /* Increase Gains to get target LBRR rate */
+ psIndices_LBRR->GainsIndices[ 0 ] = psIndices_LBRR->GainsIndices[ 0 ] + psEnc->sCmn.LBRR_GainIncreases;
+ psIndices_LBRR->GainsIndices[ 0 ] = SKP_min_int( psIndices_LBRR->GainsIndices[ 0 ], N_LEVELS_QGAIN - 1 );
+ }
+
+ /* Decode to get gains in sync with decoder */
+ /* Overwrite unquantized gains with quantized gains */
+ SKP_Silk_gains_dequant( psEncCtrl->Gains_Q16, psIndices_LBRR->GainsIndices,
+ &psEnc->sCmn.LBRRprevLastGainIndex, psEnc->sCmn.nFramesAnalyzed, psEnc->sCmn.nb_subfr );
+
+ /*****************************************/
+ /* Noise shaping quantization */
+ /*****************************************/
+ if( psEnc->sCmn.nStatesDelayedDecision > 1 || psEnc->sCmn.warping_Q16 > 0 ) {
+ SKP_Silk_NSQ_del_dec( &psEnc->sCmn, &sNSQ_LBRR, psIndices_LBRR, xfw,
+ psEnc->sCmn.pulses_LBRR[ psEnc->sCmn.nFramesAnalyzed ], psEncCtrl->PredCoef_Q12[ 0 ], psEncCtrl->LTPCoef_Q14,
+ psEncCtrl->AR2_Q13, psEncCtrl->HarmShapeGain_Q14, psEncCtrl->Tilt_Q14, psEncCtrl->LF_shp_Q14,
+ psEncCtrl->Gains_Q16, psEncCtrl->pitchL, psEncCtrl->Lambda_Q10, psEncCtrl->LTP_scale_Q14 );
+ } else {
+ SKP_Silk_NSQ( &psEnc->sCmn, &sNSQ_LBRR, psIndices_LBRR, xfw,
+ psEnc->sCmn.pulses_LBRR[ psEnc->sCmn.nFramesAnalyzed ], psEncCtrl->PredCoef_Q12[ 0 ], psEncCtrl->LTPCoef_Q14,
+ psEncCtrl->AR2_Q13, psEncCtrl->HarmShapeGain_Q14, psEncCtrl->Tilt_Q14, psEncCtrl->LF_shp_Q14,
+ psEncCtrl->Gains_Q16, psEncCtrl->pitchL, psEncCtrl->Lambda_Q10, psEncCtrl->LTP_scale_Q14 );
+ }
+
+ /* Restore original gains */
+ SKP_memcpy( psEncCtrl->Gains_Q16, TempGains_Q16, psEnc->sCmn.nb_subfr * sizeof( SKP_int32 ) );
+ }
+}
--- /dev/null
+++ b/src_FIX/SKP_Silk_find_LPC_FIX.c
@@ -1,0 +1,157 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FIX.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+/* Finds LPC vector from correlations, and converts to NLSF */
+void SKP_Silk_find_LPC_FIX(
+ SKP_int16 NLSF_Q15[], /* O NLSFs */
+ SKP_int8 *interpIndex, /* O NLSF interpolation index, only used for NLSF interpolation */
+ const SKP_int16 prev_NLSFq_Q15[], /* I previous NLSFs, only used for NLSF interpolation */
+ const SKP_int useInterpNLSFs, /* I Flag */
+ const SKP_int firstFrameAfterReset, /* I Flag */
+ const SKP_int LPC_order, /* I LPC order */
+ const SKP_int16 x[], /* I Input signal */
+ const SKP_int subfr_length, /* I Input signal subframe length including preceeding samples */
+ const SKP_int nb_subfr /* I: Number of subframes */
+)
+{
+ SKP_int k;
+ SKP_int32 a_Q16[ MAX_LPC_ORDER ];
+ SKP_int isInterpLower, shift;
+ SKP_int32 res_nrg0, res_nrg1;
+ SKP_int rshift0, rshift1;
+
+ /* Used only for LSF interpolation */
+ SKP_int32 a_tmp_Q16[ MAX_LPC_ORDER ], res_nrg_interp, res_nrg, res_tmp_nrg, res_nrg_2nd;
+ SKP_int res_nrg_interp_Q, res_nrg_Q, res_tmp_nrg_Q, res_nrg_2nd_Q;
+ SKP_int16 a_tmp_Q12[ MAX_LPC_ORDER ];
+ SKP_int16 NLSF0_Q15[ MAX_LPC_ORDER ];
+ SKP_int16 LPC_res[ ( MAX_FRAME_LENGTH + MAX_NB_SUBFR * MAX_LPC_ORDER ) / 2 ];
+
+ /* Default: no interpolation */
+ *interpIndex = 4;
+
+ /* Burg AR analysis for the full frame */
+ SKP_Silk_burg_modified( &res_nrg, &res_nrg_Q, a_Q16, x, subfr_length, nb_subfr, SKP_FIX_CONST( FIND_LPC_COND_FAC, 32 ), LPC_order );
+
+ if( firstFrameAfterReset ) {
+ SKP_Silk_bwexpander_32( a_Q16, LPC_order, SKP_FIX_CONST( FIND_LPC_CHIRP_FIRST_FRAME, 16 ) );
+ } else {
+ SKP_Silk_bwexpander_32( a_Q16, LPC_order, SKP_FIX_CONST( FIND_LPC_CHIRP, 16 ) );
+ }
+
+ if( useInterpNLSFs && !firstFrameAfterReset && nb_subfr == MAX_NB_SUBFR ) {
+
+ /* Optimal solution for last 10 ms */
+ SKP_Silk_burg_modified( &res_tmp_nrg, &res_tmp_nrg_Q, a_tmp_Q16, x + ( MAX_NB_SUBFR >> 1 ) * subfr_length,
+ subfr_length, ( MAX_NB_SUBFR >> 1 ), SKP_FIX_CONST( FIND_LPC_COND_FAC, 32 ), LPC_order );
+
+ SKP_Silk_bwexpander_32( a_tmp_Q16, LPC_order, SKP_FIX_CONST( FIND_LPC_CHIRP, 16 ) );
+
+ /* subtract residual energy here, as that's easier than adding it to the */
+ /* residual energy of the first 10 ms in each iteration of the search below */
+ shift = res_tmp_nrg_Q - res_nrg_Q;
+ if( shift >= 0 ) {
+ if( shift < 32 ) {
+ res_nrg = res_nrg - SKP_RSHIFT( res_tmp_nrg, shift );
+ }
+ } else {
+ SKP_assert( shift > -32 );
+ res_nrg = SKP_RSHIFT( res_nrg, -shift ) - res_tmp_nrg;
+ res_nrg_Q = res_tmp_nrg_Q;
+ }
+
+ /* Convert to NLSFs */
+ SKP_Silk_A2NLSF( NLSF_Q15, a_tmp_Q16, LPC_order );
+
+ /* Search over interpolation indices to find the one with lowest residual energy */
+ res_nrg_2nd = SKP_int32_MAX;
+ for( k = 3; k >= 0; k-- ) {
+ /* Interpolate NLSFs for first half */
+ SKP_Silk_interpolate( NLSF0_Q15, prev_NLSFq_Q15, NLSF_Q15, k, LPC_order );
+
+ /* Convert to LPC for residual energy evaluation */
+ SKP_Silk_NLSF2A_stable( a_tmp_Q12, NLSF0_Q15, LPC_order );
+
+ /* Calculate residual energy with NLSF interpolation */
+ SKP_Silk_LPC_analysis_filter( LPC_res, x, a_tmp_Q12, 2 * subfr_length, LPC_order );
+
+ SKP_Silk_sum_sqr_shift( &res_nrg0, &rshift0, LPC_res + LPC_order, subfr_length - LPC_order );
+ SKP_Silk_sum_sqr_shift( &res_nrg1, &rshift1, LPC_res + LPC_order + subfr_length, subfr_length - LPC_order );
+
+ /* Add subframe energies from first half frame */
+ shift = rshift0 - rshift1;
+ if( shift >= 0 ) {
+ res_nrg1 = SKP_RSHIFT( res_nrg1, shift );
+ res_nrg_interp_Q = -rshift0;
+ } else {
+ res_nrg0 = SKP_RSHIFT( res_nrg0, -shift );
+ res_nrg_interp_Q = -rshift1;
+ }
+ res_nrg_interp = SKP_ADD32( res_nrg0, res_nrg1 );
+
+ /* Compare with first half energy without NLSF interpolation, or best interpolated value so far */
+ shift = res_nrg_interp_Q - res_nrg_Q;
+ if( shift >= 0 ) {
+ if( SKP_RSHIFT( res_nrg_interp, shift ) < res_nrg ) {
+ isInterpLower = SKP_TRUE;
+ } else {
+ isInterpLower = SKP_FALSE;
+ }
+ } else {
+ if( -shift < 32 ) {
+ if( res_nrg_interp < SKP_RSHIFT( res_nrg, -shift ) ) {
+ isInterpLower = SKP_TRUE;
+ } else {
+ isInterpLower = SKP_FALSE;
+ }
+ } else {
+ isInterpLower = SKP_FALSE;
+ }
+ }
+
+ /* Determine whether current interpolated NLSFs are best so far */
+ if( isInterpLower == SKP_TRUE ) {
+ /* Interpolation has lower residual energy */
+ res_nrg = res_nrg_interp;
+ res_nrg_Q = res_nrg_interp_Q;
+ *interpIndex = (SKP_int8)k;
+ }
+ res_nrg_2nd = res_nrg_interp;
+ res_nrg_2nd_Q = res_nrg_interp_Q;
+ }
+ }
+
+ if( *interpIndex == 4 ) {
+ /* NLSF interpolation is currently inactive, calculate NLSFs from full frame AR coefficients */
+ SKP_Silk_A2NLSF( NLSF_Q15, a_Q16, LPC_order );
+ }
+
+ SKP_assert( *interpIndex == 4 || ( useInterpNLSFs && !firstFrameAfterReset && nb_subfr == MAX_NB_SUBFR ) );
+}
--- /dev/null
+++ b/src_FIX/SKP_Silk_find_LTP_FIX.c
@@ -1,0 +1,241 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FIX.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+/* Head room for correlations */
+#define LTP_CORRS_HEAD_ROOM 2
+
+void SKP_Silk_fit_LTP(
+ SKP_int32 LTP_coefs_Q16[ LTP_ORDER ],
+ SKP_int16 LTP_coefs_Q14[ LTP_ORDER ]
+);
+
+void SKP_Silk_find_LTP_FIX(
+ SKP_int16 b_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* O LTP coefs */
+ SKP_int32 WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */
+ SKP_int *LTPredCodGain_Q7, /* O LTP coding gain */
+ const SKP_int16 r_lpc[] , /* I residual signal after LPC signal + state for first 10 ms */
+ const SKP_int lag[ MAX_NB_SUBFR ], /* I LTP lags */
+ const SKP_int32 Wght_Q15[ MAX_NB_SUBFR ], /* I weights */
+ const SKP_int subfr_length, /* I subframe length */
+ const SKP_int nb_subfr, /* I number of subframes */
+ const SKP_int mem_offset, /* I number of samples in LTP memory */
+ SKP_int corr_rshifts[ MAX_NB_SUBFR ] /* O right shifts applied to correlations */
+)
+{
+ SKP_int i, k, lshift;
+ const SKP_int16 *r_ptr, *lag_ptr;
+ SKP_int16 *b_Q14_ptr;
+
+ SKP_int32 regu;
+ SKP_int32 *WLTP_ptr;
+ SKP_int32 b_Q16[ LTP_ORDER ], delta_b_Q14[ LTP_ORDER ], d_Q14[ MAX_NB_SUBFR ], nrg[ MAX_NB_SUBFR ], g_Q26;
+ SKP_int32 w[ MAX_NB_SUBFR ], WLTP_max, max_abs_d_Q14, max_w_bits;
+
+ SKP_int32 temp32, denom32;
+ SKP_int extra_shifts;
+ SKP_int rr_shifts, maxRshifts, maxRshifts_wxtra, LZs;
+ SKP_int32 LPC_res_nrg, LPC_LTP_res_nrg, div_Q16;
+ SKP_int32 Rr[ LTP_ORDER ], rr[ MAX_NB_SUBFR ];
+ SKP_int32 wd, m_Q12;
+
+ b_Q14_ptr = b_Q14;
+ WLTP_ptr = WLTP;
+ r_ptr = &r_lpc[ mem_offset ];
+ for( k = 0; k < nb_subfr; k++ ) {
+ lag_ptr = r_ptr - ( lag[ k ] + LTP_ORDER / 2 );
+
+ SKP_Silk_sum_sqr_shift( &rr[ k ], &rr_shifts, r_ptr, subfr_length ); /* rr[ k ] in Q( -rr_shifts ) */
+
+ /* Assure headroom */
+ LZs = SKP_Silk_CLZ32( rr[k] );
+ if( LZs < LTP_CORRS_HEAD_ROOM ) {
+ rr[ k ] = SKP_RSHIFT_ROUND( rr[ k ], LTP_CORRS_HEAD_ROOM - LZs );
+ rr_shifts += ( LTP_CORRS_HEAD_ROOM - LZs );
+ }
+ corr_rshifts[ k ] = rr_shifts;
+ SKP_Silk_corrMatrix_FIX( lag_ptr, subfr_length, LTP_ORDER, LTP_CORRS_HEAD_ROOM, WLTP_ptr, &corr_rshifts[ k ] ); /* WLTP_fix_ptr in Q( -corr_rshifts[ k ] ) */
+
+ /* The correlation vector always has lower max abs value than rr and/or RR so head room is assured */
+ SKP_Silk_corrVector_FIX( lag_ptr, r_ptr, subfr_length, LTP_ORDER, Rr, corr_rshifts[ k ] ); /* Rr_fix_ptr in Q( -corr_rshifts[ k ] ) */
+ if( corr_rshifts[ k ] > rr_shifts ) {
+ rr[ k ] = SKP_RSHIFT( rr[ k ], corr_rshifts[ k ] - rr_shifts ); /* rr[ k ] in Q( -corr_rshifts[ k ] ) */
+ }
+ SKP_assert( rr[ k ] >= 0 );
+
+ regu = 1;
+ regu = SKP_SMLAWB( regu, rr[ k ], SKP_FIX_CONST( LTP_DAMPING/3, 16 ) );
+ regu = SKP_SMLAWB( regu, matrix_ptr( WLTP_ptr, 0, 0, LTP_ORDER ), SKP_FIX_CONST( LTP_DAMPING/3, 16 ) );
+ regu = SKP_SMLAWB( regu, matrix_ptr( WLTP_ptr, LTP_ORDER-1, LTP_ORDER-1, LTP_ORDER ), SKP_FIX_CONST( LTP_DAMPING/3, 16 ) );
+ SKP_Silk_regularize_correlations_FIX( WLTP_ptr, &rr[k], regu, LTP_ORDER );
+
+ SKP_Silk_solve_LDL_FIX( WLTP_ptr, LTP_ORDER, Rr, b_Q16 ); /* WLTP_fix_ptr and Rr_fix_ptr both in Q(-corr_rshifts[k]) */
+
+ /* Limit and store in Q14 */
+ SKP_Silk_fit_LTP( b_Q16, b_Q14_ptr );
+
+ /* Calculate residual energy */
+ nrg[ k ] = SKP_Silk_residual_energy16_covar_FIX( b_Q14_ptr, WLTP_ptr, Rr, rr[ k ], LTP_ORDER, 14 ); /* nrg_fix in Q( -corr_rshifts[ k ] ) */
+
+ /* temp = Wght[ k ] / ( nrg[ k ] * Wght[ k ] + 0.01f * subfr_length ); */
+ extra_shifts = SKP_min_int( corr_rshifts[ k ], LTP_CORRS_HEAD_ROOM );
+ denom32 = SKP_LSHIFT_SAT32( SKP_SMULWB( nrg[ k ], Wght_Q15[ k ] ), 1 + extra_shifts ) + /* Q( -corr_rshifts[ k ] + extra_shifts ) */
+ SKP_RSHIFT( SKP_SMULWB( subfr_length, 655 ), corr_rshifts[ k ] - extra_shifts ); /* Q( -corr_rshifts[ k ] + extra_shifts ) */
+ denom32 = SKP_max( denom32, 1 );
+ SKP_assert( ((SKP_int64)Wght_Q15[ k ] << 16 ) < SKP_int32_MAX ); /* Wght always < 0.5 in Q0 */
+ temp32 = SKP_DIV32( SKP_LSHIFT( ( SKP_int32 )Wght_Q15[ k ], 16 ), denom32 ); /* Q( 15 + 16 + corr_rshifts[k] - extra_shifts ) */
+ temp32 = SKP_RSHIFT( temp32, 31 + corr_rshifts[ k ] - extra_shifts - 26 ); /* Q26 */
+
+ /* Limit temp such that the below scaling never wraps around */
+ WLTP_max = 0;
+ for( i = 0; i < LTP_ORDER * LTP_ORDER; i++ ) {
+ WLTP_max = SKP_max( WLTP_ptr[ i ], WLTP_max );
+ }
+ lshift = SKP_Silk_CLZ32( WLTP_max ) - 1 - 3; /* keep 3 bits free for vq_nearest_neighbor_fix */
+ SKP_assert( 26 - 18 + lshift >= 0 );
+ if( 26 - 18 + lshift < 31 ) {
+ temp32 = SKP_min_32( temp32, SKP_LSHIFT( ( SKP_int32 )1, 26 - 18 + lshift ) );
+ }
+
+ SKP_Silk_scale_vector32_Q26_lshift_18( WLTP_ptr, temp32, LTP_ORDER * LTP_ORDER ); /* WLTP_ptr in Q( 18 - corr_rshifts[ k ] ) */
+
+ w[ k ] = matrix_ptr( WLTP_ptr, LTP_ORDER/2, LTP_ORDER/2, LTP_ORDER ); /* w in Q( 18 - corr_rshifts[ k ] ) */
+ SKP_assert( w[k] >= 0 );
+
+ r_ptr += subfr_length;
+ b_Q14_ptr += LTP_ORDER;
+ WLTP_ptr += LTP_ORDER * LTP_ORDER;
+ }
+
+ maxRshifts = 0;
+ for( k = 0; k < nb_subfr; k++ ) {
+ maxRshifts = SKP_max_int( corr_rshifts[ k ], maxRshifts );
+ }
+
+ /* Compute LTP coding gain */
+ if( LTPredCodGain_Q7 != NULL ) {
+ LPC_LTP_res_nrg = 0;
+ LPC_res_nrg = 0;
+ SKP_assert( LTP_CORRS_HEAD_ROOM >= 2 ); /* Check that no overflow will happen when adding */
+ for( k = 0; k < nb_subfr; k++ ) {
+ LPC_res_nrg = SKP_ADD32( LPC_res_nrg, SKP_RSHIFT( SKP_ADD32( SKP_SMULWB( rr[ k ], Wght_Q15[ k ] ), 1 ), 1 + ( maxRshifts - corr_rshifts[ k ] ) ) ); /* Q( -maxRshifts ) */
+ LPC_LTP_res_nrg = SKP_ADD32( LPC_LTP_res_nrg, SKP_RSHIFT( SKP_ADD32( SKP_SMULWB( nrg[ k ], Wght_Q15[ k ] ), 1 ), 1 + ( maxRshifts - corr_rshifts[ k ] ) ) ); /* Q( -maxRshifts ) */
+ }
+ LPC_LTP_res_nrg = SKP_max( LPC_LTP_res_nrg, 1 ); /* avoid division by zero */
+
+ div_Q16 = SKP_DIV32_varQ( LPC_res_nrg, LPC_LTP_res_nrg, 16 );
+ *LTPredCodGain_Q7 = ( SKP_int )SKP_SMULBB( 3, SKP_Silk_lin2log( div_Q16 ) - ( 16 << 7 ) );
+
+ SKP_assert( *LTPredCodGain_Q7 == ( SKP_int )SKP_SAT16( SKP_MUL( 3, SKP_Silk_lin2log( div_Q16 ) - ( 16 << 7 ) ) ) );
+ }
+
+ /* smoothing */
+ /* d = sum( B, 1 ); */
+ b_Q14_ptr = b_Q14;
+ for( k = 0; k < nb_subfr; k++ ) {
+ d_Q14[ k ] = 0;
+ for( i = 0; i < LTP_ORDER; i++ ) {
+ d_Q14[ k ] += b_Q14_ptr[ i ];
+ }
+ b_Q14_ptr += LTP_ORDER;
+ }
+
+ /* m = ( w * d' ) / ( sum( w ) + 1e-3 ); */
+
+ /* Find maximum absolute value of d_Q14 and the bits used by w in Q0 */
+ max_abs_d_Q14 = 0;
+ max_w_bits = 0;
+ for( k = 0; k < nb_subfr; k++ ) {
+ max_abs_d_Q14 = SKP_max_32( max_abs_d_Q14, SKP_abs( d_Q14[ k ] ) );
+ /* w[ k ] is in Q( 18 - corr_rshifts[ k ] ) */
+ /* Find bits needed in Q( 18 - maxRshifts ) */
+ max_w_bits = SKP_max_32( max_w_bits, 32 - SKP_Silk_CLZ32( w[ k ] ) + corr_rshifts[ k ] - maxRshifts );
+ }
+
+ /* max_abs_d_Q14 = (5 << 15); worst case, i.e. LTP_ORDER * -SKP_int16_MIN */
+ SKP_assert( max_abs_d_Q14 <= ( 5 << 15 ) );
+
+ /* How many bits is needed for w*d' in Q( 18 - maxRshifts ) in the worst case, of all d_Q14's being equal to max_abs_d_Q14 */
+ extra_shifts = max_w_bits + 32 - SKP_Silk_CLZ32( max_abs_d_Q14 ) - 14;
+
+ /* Subtract what we got available; bits in output var plus maxRshifts */
+ extra_shifts -= ( 32 - 1 - 2 + maxRshifts ); /* Keep sign bit free as well as 2 bits for accumulation */
+ extra_shifts = SKP_max_int( extra_shifts, 0 );
+
+ maxRshifts_wxtra = maxRshifts + extra_shifts;
+
+ temp32 = SKP_RSHIFT( 262, maxRshifts + extra_shifts ) + 1; /* 1e-3f in Q( 18 - (maxRshifts + extra_shifts) ) */
+ wd = 0;
+ for( k = 0; k < nb_subfr; k++ ) {
+ /* w has at least 2 bits of headroom so no overflow should happen */
+ temp32 = SKP_ADD32( temp32, SKP_RSHIFT( w[ k ], maxRshifts_wxtra - corr_rshifts[ k ] ) ); /* Q( 18 - maxRshifts_wxtra ) */
+ wd = SKP_ADD32( wd, SKP_LSHIFT( SKP_SMULWW( SKP_RSHIFT( w[ k ], maxRshifts_wxtra - corr_rshifts[ k ] ), d_Q14[ k ] ), 2 ) ); /* Q( 18 - maxRshifts_wxtra ) */
+ }
+ m_Q12 = SKP_DIV32_varQ( wd, temp32, 12 );
+
+ b_Q14_ptr = b_Q14;
+ for( k = 0; k < nb_subfr; k++ ) {
+ /* w_fix[ k ] from Q( 18 - corr_rshifts[ k ] ) to Q( 16 ) */
+ if( 2 - corr_rshifts[k] > 0 ) {
+ temp32 = SKP_RSHIFT( w[ k ], 2 - corr_rshifts[ k ] );
+ } else {
+ temp32 = SKP_LSHIFT_SAT32( w[ k ], corr_rshifts[ k ] - 2 );
+ }
+
+ g_Q26 = SKP_MUL(
+ SKP_DIV32(
+ SKP_FIX_CONST( LTP_SMOOTHING, 26 ),
+ SKP_RSHIFT( SKP_FIX_CONST( LTP_SMOOTHING, 26 ), 10 ) + temp32 ), /* Q10 */
+ SKP_LSHIFT_SAT32( SKP_SUB_SAT32( ( SKP_int32 )m_Q12, SKP_RSHIFT( d_Q14[ k ], 2 ) ), 4 ) ); /* Q16 */
+
+ temp32 = 0;
+ for( i = 0; i < LTP_ORDER; i++ ) {
+ delta_b_Q14[ i ] = SKP_max_16( b_Q14_ptr[ i ], 1638 ); /* 1638_Q14 = 0.1_Q0 */
+ temp32 += delta_b_Q14[ i ]; /* Q14 */
+ }
+ temp32 = SKP_DIV32( g_Q26, temp32 ); /* Q14->Q12 */
+ for( i = 0; i < LTP_ORDER; i++ ) {
+ b_Q14_ptr[ i ] = SKP_LIMIT_32( ( SKP_int32 )b_Q14_ptr[ i ] + SKP_SMULWB( SKP_LSHIFT_SAT32( temp32, 4 ), delta_b_Q14[ i ] ), -16000, 28000 );
+ }
+ b_Q14_ptr += LTP_ORDER;
+ }
+TOC(find_LTP_FIX)
+}
+
+void SKP_Silk_fit_LTP(
+ SKP_int32 LTP_coefs_Q16[ LTP_ORDER ],
+ SKP_int16 LTP_coefs_Q14[ LTP_ORDER ]
+)
+{
+ SKP_int i;
+
+ for( i = 0; i < LTP_ORDER; i++ ) {
+ LTP_coefs_Q14[ i ] = ( SKP_int16 )SKP_SAT16( SKP_RSHIFT_ROUND( LTP_coefs_Q16[ i ], 2 ) );
+ }
+}
--- /dev/null
+++ b/src_FIX/SKP_Silk_find_pitch_lags_FIX.c
@@ -1,0 +1,133 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FIX.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+/* Find pitch lags */
+void SKP_Silk_find_pitch_lags_FIX(
+ SKP_Silk_encoder_state_FIX *psEnc, /* I/O encoder state */
+ SKP_Silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */
+ SKP_int16 res[], /* O residual */
+ const SKP_int16 x[] /* I Speech signal */
+)
+{
+ SKP_int buf_len, i, scale;
+ SKP_int32 thrhld_Q15, res_nrg;
+ const SKP_int16 *x_buf, *x_buf_ptr;
+ SKP_int16 Wsig[ FIND_PITCH_LPC_WIN_MAX ], *Wsig_ptr;
+ SKP_int32 auto_corr[ MAX_FIND_PITCH_LPC_ORDER + 1 ];
+ SKP_int16 rc_Q15[ MAX_FIND_PITCH_LPC_ORDER ];
+ SKP_int32 A_Q24[ MAX_FIND_PITCH_LPC_ORDER ];
+ SKP_int16 A_Q12[ MAX_FIND_PITCH_LPC_ORDER ];
+
+ /******************************************/
+ /* Setup buffer lengths etc based on Fs */
+ /******************************************/
+ buf_len = psEnc->sCmn.la_pitch + psEnc->sCmn.frame_length + psEnc->sCmn.ltp_mem_length;
+
+ /* Safty check */
+ SKP_assert( buf_len >= psEnc->sCmn.pitch_LPC_win_length );
+
+ x_buf = x - psEnc->sCmn.ltp_mem_length;
+
+ /*************************************/
+ /* Estimate LPC AR coefficients */
+ /*************************************/
+
+ /* Calculate windowed signal */
+
+ /* First LA_LTP samples */
+ x_buf_ptr = x_buf + buf_len - psEnc->sCmn.pitch_LPC_win_length;
+ Wsig_ptr = Wsig;
+ SKP_Silk_apply_sine_window( Wsig_ptr, x_buf_ptr, 1, psEnc->sCmn.la_pitch );
+
+ /* Middle un - windowed samples */
+ Wsig_ptr += psEnc->sCmn.la_pitch;
+ x_buf_ptr += psEnc->sCmn.la_pitch;
+ SKP_memcpy( Wsig_ptr, x_buf_ptr, ( psEnc->sCmn.pitch_LPC_win_length - SKP_LSHIFT( psEnc->sCmn.la_pitch, 1 ) ) * sizeof( SKP_int16 ) );
+
+ /* Last LA_LTP samples */
+ Wsig_ptr += psEnc->sCmn.pitch_LPC_win_length - SKP_LSHIFT( psEnc->sCmn.la_pitch, 1 );
+ x_buf_ptr += psEnc->sCmn.pitch_LPC_win_length - SKP_LSHIFT( psEnc->sCmn.la_pitch, 1 );
+ SKP_Silk_apply_sine_window( Wsig_ptr, x_buf_ptr, 2, psEnc->sCmn.la_pitch );
+
+ /* Calculate autocorrelation sequence */
+ SKP_Silk_autocorr( auto_corr, &scale, Wsig, psEnc->sCmn.pitch_LPC_win_length, psEnc->sCmn.pitchEstimationLPCOrder + 1 );
+
+ /* Add white noise, as fraction of energy */
+ auto_corr[ 0 ] = SKP_SMLAWB( auto_corr[ 0 ], auto_corr[ 0 ], SKP_FIX_CONST( FIND_PITCH_WHITE_NOISE_FRACTION, 16 ) ) + 1;
+
+ /* Calculate the reflection coefficients using schur */
+ res_nrg = SKP_Silk_schur( rc_Q15, auto_corr, psEnc->sCmn.pitchEstimationLPCOrder );
+
+ /* Prediction gain */
+ psEncCtrl->predGain_Q16 = SKP_DIV32_varQ( auto_corr[ 0 ], SKP_max_int( res_nrg, 1 ), 16 );
+
+ /* Convert reflection coefficients to prediction coefficients */
+ SKP_Silk_k2a( A_Q24, rc_Q15, psEnc->sCmn.pitchEstimationLPCOrder );
+
+ /* Convert From 32 bit Q24 to 16 bit Q12 coefs */
+ for( i = 0; i < psEnc->sCmn.pitchEstimationLPCOrder; i++ ) {
+ A_Q12[ i ] = ( SKP_int16 )SKP_SAT16( SKP_RSHIFT( A_Q24[ i ], 12 ) );
+ }
+
+ /* Do BWE */
+ SKP_Silk_bwexpander( A_Q12, psEnc->sCmn.pitchEstimationLPCOrder, SKP_FIX_CONST( FIND_PITCH_BANDWITH_EXPANSION, 16 ) );
+
+ /*****************************************/
+ /* LPC analysis filtering */
+ /*****************************************/
+ SKP_Silk_LPC_analysis_filter( res, x_buf, A_Q12, buf_len, psEnc->sCmn.pitchEstimationLPCOrder );
+
+ if( psEnc->sCmn.indices.signalType != TYPE_NO_VOICE_ACTIVITY && psEnc->sCmn.first_frame_after_reset == 0 ) {
+ /* Threshold for pitch estimator */
+ thrhld_Q15 = SKP_FIX_CONST( 0.6, 15 );
+ thrhld_Q15 = SKP_SMLABB( thrhld_Q15, SKP_FIX_CONST( -0.004, 15 ), psEnc->sCmn.pitchEstimationLPCOrder );
+ thrhld_Q15 = SKP_SMLABB( thrhld_Q15, SKP_FIX_CONST( -0.1, 7 ), psEnc->sCmn.speech_activity_Q8 );
+ thrhld_Q15 = SKP_SMLABB( thrhld_Q15, SKP_FIX_CONST( -0.15, 15 ), SKP_RSHIFT( psEnc->sCmn.prevSignalType, 1 ) );
+ thrhld_Q15 = SKP_SMLAWB( thrhld_Q15, SKP_FIX_CONST( -0.1, 16 ), psEnc->sCmn.input_tilt_Q15 );
+ thrhld_Q15 = SKP_SAT16( thrhld_Q15 );
+
+ /*****************************************/
+ /* Call pitch estimator */
+ /*****************************************/
+ if( SKP_Silk_pitch_analysis_core( res, psEncCtrl->pitchL, &psEnc->sCmn.indices.lagIndex, &psEnc->sCmn.indices.contourIndex,
+ &psEnc->LTPCorr_Q15, psEnc->sCmn.prevLag, psEnc->sCmn.pitchEstimationThreshold_Q16,
+ ( SKP_int16 )thrhld_Q15, psEnc->sCmn.fs_kHz, psEnc->sCmn.pitchEstimationComplexity, psEnc->sCmn.nb_subfr ) == 0 )
+ {
+ psEnc->sCmn.indices.signalType = TYPE_VOICED;
+ } else {
+ psEnc->sCmn.indices.signalType = TYPE_UNVOICED;
+ }
+ } else {
+ SKP_memset( psEncCtrl->pitchL, 0, sizeof( psEncCtrl->pitchL ) );
+ psEnc->sCmn.indices.lagIndex = 0;
+ psEnc->sCmn.indices.contourIndex = 0;
+ psEnc->LTPCorr_Q15 = 0;
+ }
+}
--- /dev/null
+++ b/src_FIX/SKP_Silk_find_pred_coefs_FIX.c
@@ -1,0 +1,127 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FIX.h"
+
+void SKP_Silk_find_pred_coefs_FIX(
+ SKP_Silk_encoder_state_FIX *psEnc, /* I/O encoder state */
+ SKP_Silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */
+ const SKP_int16 res_pitch[], /* I Residual from pitch analysis */
+ const SKP_int16 x[] /* I Speech signal */
+)
+{
+ SKP_int i;
+ SKP_int32 WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ];
+ SKP_int32 invGains_Q16[ MAX_NB_SUBFR ], local_gains[ MAX_NB_SUBFR ], Wght_Q15[ MAX_NB_SUBFR ];
+ SKP_int16 NLSF_Q15[ MAX_LPC_ORDER ];
+ const SKP_int16 *x_ptr;
+ SKP_int16 *x_pre_ptr, LPC_in_pre[ MAX_NB_SUBFR * MAX_LPC_ORDER + MAX_FRAME_LENGTH ];
+ SKP_int32 tmp, min_gain_Q16;
+ SKP_int LTP_corrs_rshift[ MAX_NB_SUBFR ];
+
+ /* weighting for weighted least squares */
+ min_gain_Q16 = SKP_int32_MAX >> 6;
+ for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
+ min_gain_Q16 = SKP_min( min_gain_Q16, psEncCtrl->Gains_Q16[ i ] );
+ }
+ for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
+ /* Divide to Q16 */
+ SKP_assert( psEncCtrl->Gains_Q16[ i ] > 0 );
+ /* Invert and normalize gains, and ensure that maximum invGains_Q16 is within range of a 16 bit int */
+ invGains_Q16[ i ] = SKP_DIV32_varQ( min_gain_Q16, psEncCtrl->Gains_Q16[ i ], 16 - 2 );
+
+ /* Ensure Wght_Q15 a minimum value 1 */
+ invGains_Q16[ i ] = SKP_max( invGains_Q16[ i ], 363 );
+
+ /* Square the inverted gains */
+ SKP_assert( invGains_Q16[ i ] == SKP_SAT16( invGains_Q16[ i ] ) );
+ tmp = SKP_SMULWB( invGains_Q16[ i ], invGains_Q16[ i ] );
+ Wght_Q15[ i ] = SKP_RSHIFT( tmp, 1 );
+
+ /* Invert the inverted and normalized gains */
+ local_gains[ i ] = SKP_DIV32( ( 1 << 16 ), invGains_Q16[ i ] );
+ }
+
+ if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
+ /**********/
+ /* VOICED */
+ /**********/
+ SKP_assert( psEnc->sCmn.ltp_mem_length - psEnc->sCmn.predictLPCOrder >= psEncCtrl->pitchL[ 0 ] + LTP_ORDER / 2 );
+
+ /* LTP analysis */
+ SKP_Silk_find_LTP_FIX( psEncCtrl->LTPCoef_Q14, WLTP, &psEncCtrl->LTPredCodGain_Q7,
+ res_pitch, psEncCtrl->pitchL, Wght_Q15, psEnc->sCmn.subfr_length,
+ psEnc->sCmn.nb_subfr, psEnc->sCmn.ltp_mem_length, LTP_corrs_rshift );
+
+ /* Quantize LTP gain parameters */
+ SKP_Silk_quant_LTP_gains( psEncCtrl->LTPCoef_Q14, psEnc->sCmn.indices.LTPIndex, &psEnc->sCmn.indices.PERIndex,
+ WLTP, psEnc->sCmn.mu_LTP_Q9, psEnc->sCmn.LTPQuantLowComplexity, psEnc->sCmn.nb_subfr);
+
+ /* Control LTP scaling */
+ SKP_Silk_LTP_scale_ctrl_FIX( psEnc, psEncCtrl );
+
+ /* Create LTP residual */
+ SKP_Silk_LTP_analysis_filter_FIX( LPC_in_pre, psEnc->x_buf + psEnc->sCmn.ltp_mem_length - psEnc->sCmn.predictLPCOrder,
+ psEncCtrl->LTPCoef_Q14, psEncCtrl->pitchL, invGains_Q16, psEnc->sCmn.subfr_length, psEnc->sCmn.nb_subfr, psEnc->sCmn.predictLPCOrder );
+
+ } else {
+ /************/
+ /* UNVOICED */
+ /************/
+ /* Create signal with prepended subframes, scaled by inverse gains */
+ x_ptr = x - psEnc->sCmn.predictLPCOrder;
+ x_pre_ptr = LPC_in_pre;
+ for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
+ SKP_Silk_scale_copy_vector16( x_pre_ptr, x_ptr, invGains_Q16[ i ],
+ psEnc->sCmn.subfr_length + psEnc->sCmn.predictLPCOrder );
+ x_pre_ptr += psEnc->sCmn.subfr_length + psEnc->sCmn.predictLPCOrder;
+ x_ptr += psEnc->sCmn.subfr_length;
+ }
+
+ SKP_memset( psEncCtrl->LTPCoef_Q14, 0, psEnc->sCmn.nb_subfr * LTP_ORDER * sizeof( SKP_int16 ) );
+ psEncCtrl->LTPredCodGain_Q7 = 0;
+ }
+
+ /* LPC_in_pre contains the LTP-filtered input for voiced, and the unfiltered input for unvoiced */
+ TIC(FIND_LPC)
+ SKP_Silk_find_LPC_FIX( NLSF_Q15, &psEnc->sCmn.indices.NLSFInterpCoef_Q2, psEnc->sCmn.prev_NLSFq_Q15,
+ psEnc->sCmn.useInterpolatedNLSFs, psEnc->sCmn.first_frame_after_reset, psEnc->sCmn.predictLPCOrder,
+ LPC_in_pre, psEnc->sCmn.subfr_length + psEnc->sCmn.predictLPCOrder, psEnc->sCmn.nb_subfr );
+ TOC(FIND_LPC)
+
+ /* Quantize LSFs */
+ TIC(PROCESS_LSFS)
+ SKP_Silk_process_NLSFs( &psEnc->sCmn, psEncCtrl->PredCoef_Q12, NLSF_Q15, psEnc->sCmn.prev_NLSFq_Q15 );
+ TOC(PROCESS_LSFS)
+
+ /* Calculate residual energy using quantized LPC coefficients */
+ SKP_Silk_residual_energy_FIX( psEncCtrl->ResNrg, psEncCtrl->ResNrgQ, LPC_in_pre, psEncCtrl->PredCoef_Q12, local_gains,
+ psEnc->sCmn.subfr_length, psEnc->sCmn.nb_subfr, psEnc->sCmn.predictLPCOrder );
+
+ /* Copy to prediction struct for use in next frame for fluctuation reduction */
+ SKP_memcpy( psEnc->sCmn.prev_NLSFq_Q15, NLSF_Q15, sizeof( psEnc->sCmn.prev_NLSFq_Q15 ) );
+}
--- /dev/null
+++ b/src_FIX/SKP_Silk_main_FIX.h
@@ -1,0 +1,244 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef SKP_SILK_MAIN_FIX_H
+#define SKP_SILK_MAIN_FIX_H
+
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_structs_FIX.h"
+#include "SKP_Silk_control.h"
+#include "SKP_Silk_main.h"
+#include "SKP_Silk_PLC.h"
+#include "SKP_debug.h"
+#include "entenc.h"
+
+#ifndef FORCE_CPP_BUILD
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+#endif
+
+/*********************/
+/* Encoder Functions */
+/*********************/
+
+/* Encoder main function */
+SKP_int SKP_Silk_encode_frame_FIX(
+ SKP_Silk_encoder_state_FIX *psEnc, /* I/O Pointer to Silk FIX encoder state */
+ SKP_int32 *pnBytesOut, /* O Pointer to number of payload bytes; */
+ ec_enc *psRangeEnc /* I/O compressor data structure */
+);
+
+/* Low Bitrate Redundancy (LBRR) encoding. Reuse all parameters but encode with lower bitrate */
+void SKP_Silk_LBRR_encode_FIX(
+ SKP_Silk_encoder_state_FIX *psEnc, /* I/O Pointer to Silk FIX encoder state */
+ SKP_Silk_encoder_control_FIX *psEncCtrl, /* I/O Pointer to Silk FIX encoder control struct */
+ const SKP_int16 xfw[] /* I Input signal */
+);
+
+/* Initializes the Silk encoder state */
+SKP_int SKP_Silk_init_encoder(
+ SKP_Silk_encoder_state_FIX *psEnc /* I/O Pointer to Silk FIX encoder state */
+);
+
+/* Control the Silk encoder */
+SKP_int SKP_Silk_control_encoder(
+ SKP_Silk_encoder_state_FIX *psEnc, /* I/O Pointer to Silk encoder state */
+ SKP_SILK_SDK_EncControlStruct *encControl, /* I: Control structure */
+ const SKP_int32 TargetRate_bps, /* I Target max bitrate (bps) */
+ const SKP_int allow_bw_switch /* I Flag to allow switching audio bandwidth */
+);
+
+/****************/
+/* Prefiltering */
+/****************/
+void SKP_Silk_prefilter_FIX(
+ SKP_Silk_encoder_state_FIX *psEnc, /* I/O Encoder state */
+ const SKP_Silk_encoder_control_FIX *psEncCtrl, /* I Encoder control */
+ SKP_int16 xw[], /* O Weighted signal */
+ const SKP_int16 x[] /* I Speech signal */
+);
+
+/**************************/
+/* Noise shaping analysis */
+/**************************/
+/* Compute noise shaping coefficients and initial gain values */
+void SKP_Silk_noise_shape_analysis_FIX(
+ SKP_Silk_encoder_state_FIX *psEnc, /* I/O Encoder state FIX */
+ SKP_Silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control FIX */
+ const SKP_int16 *pitch_res, /* I LPC residual from pitch analysis */
+ const SKP_int16 *x /* I Input signal [ frame_length + la_shape ] */
+);
+
+/* Autocorrelations for a warped frequency axis */
+void SKP_Silk_warped_autocorrelation_FIX(
+ SKP_int32 *corr, /* O Result [order + 1] */
+ SKP_int *scale, /* O Scaling of the correlation vector */
+ const SKP_int16 *input, /* I Input data to correlate */
+ const SKP_int warping_Q16, /* I Warping coefficient */
+ const SKP_int length, /* I Length of input */
+ const SKP_int order /* I Correlation order (even) */
+);
+
+/* Calculation of LTP state scaling */
+void SKP_Silk_LTP_scale_ctrl_FIX(
+ SKP_Silk_encoder_state_FIX *psEnc, /* I/O encoder state */
+ SKP_Silk_encoder_control_FIX *psEncCtrl /* I/O encoder control */
+);
+
+/**********************************************/
+/* Prediction Analysis */
+/**********************************************/
+/* Find pitch lags */
+void SKP_Silk_find_pitch_lags_FIX(
+ SKP_Silk_encoder_state_FIX *psEnc, /* I/O encoder state */
+ SKP_Silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */
+ SKP_int16 res[], /* O residual */
+ const SKP_int16 x[] /* I Speech signal */
+);
+
+/* Find LPC and LTP coefficients */
+void SKP_Silk_find_pred_coefs_FIX(
+ SKP_Silk_encoder_state_FIX *psEnc, /* I/O encoder state */
+ SKP_Silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */
+ const SKP_int16 res_pitch[], /* I Residual from pitch analysis */
+ const SKP_int16 x[] /* I Speech signal */
+);
+
+/* LPC analysis */
+void SKP_Silk_find_LPC_FIX(
+ SKP_int16 NLSF_Q15[], /* O NLSFs */
+ SKP_int8 *interpIndex, /* O NLSF interpolation index, only used for NLSF interpolation */
+ const SKP_int16 prev_NLSFq_Q15[], /* I previous NLSFs, only used for NLSF interpolation */
+ const SKP_int useInterpNLSFs, /* I Flag */
+ const SKP_int firstFrameAfterReset, /* I Flag */
+ const SKP_int LPC_order, /* I LPC order */
+ const SKP_int16 x[], /* I Input signal */
+ const SKP_int subfr_length, /* I Input signal subframe length including preceeding samples */
+ const SKP_int nb_subfr /* I: Number of subframes */
+);
+
+/* LTP analysis */
+void SKP_Silk_find_LTP_FIX(
+ SKP_int16 b_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* O LTP coefs */
+ SKP_int32 WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */
+ SKP_int *LTPredCodGain_Q7, /* O LTP coding gain */
+ const SKP_int16 r_lpc[], /* I residual signal after LPC signal + state for first 10 ms */
+ const SKP_int lag[ MAX_NB_SUBFR ], /* I LTP lags */
+ const SKP_int32 Wght_Q15[ MAX_NB_SUBFR ], /* I weights */
+ const SKP_int subfr_length, /* I subframe length */
+ const SKP_int nb_subfr, /* I number of subframes */
+ const SKP_int mem_offset, /* I number of samples in LTP memory */
+ SKP_int corr_rshifts[ MAX_NB_SUBFR ] /* O right shifts applied to correlations */
+);
+
+void SKP_Silk_LTP_analysis_filter_FIX(
+ SKP_int16 *LTP_res, /* O: LTP residual signal of length MAX_NB_SUBFR * ( pre_length + subfr_length ) */
+ const SKP_int16 *x, /* I: Pointer to input signal with at least max( pitchL ) preceeding samples */
+ const SKP_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ],/* I: LTP_ORDER LTP coefficients for each MAX_NB_SUBFR subframe */
+ const SKP_int pitchL[ MAX_NB_SUBFR ], /* I: Pitch lag, one for each subframe */
+ const SKP_int32 invGains_Q16[ MAX_NB_SUBFR ], /* I: Inverse quantization gains, one for each subframe */
+ const SKP_int subfr_length, /* I: Length of each subframe */
+ const SKP_int nb_subfr, /* I: Number of subframes */
+ const SKP_int pre_length /* I: Length of the preceeding samples starting at &x[0] for each subframe */
+);
+
+/* Calculates residual energies of input subframes where all subframes have LPC_order */
+/* of preceeding samples */
+void SKP_Silk_residual_energy_FIX(
+ SKP_int32 nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */
+ SKP_int nrgsQ[ MAX_NB_SUBFR ], /* O Q value per subframe */
+ const SKP_int16 x[], /* I Input signal */
+ const SKP_int16 a_Q12[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */
+ const SKP_int32 gains[ MAX_NB_SUBFR ], /* I Quantization gains */
+ const SKP_int subfr_length, /* I Subframe length */
+ const SKP_int nb_subfr, /* I Number of subframes */
+ const SKP_int LPC_order /* I LPC order */
+);
+
+/* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */
+SKP_int32 SKP_Silk_residual_energy16_covar_FIX(
+ const SKP_int16 *c, /* I Prediction vector */
+ const SKP_int32 *wXX, /* I Correlation matrix */
+ const SKP_int32 *wXx, /* I Correlation vector */
+ SKP_int32 wxx, /* I Signal energy */
+ SKP_int D, /* I Dimension */
+ SKP_int cQ /* I Q value for c vector 0 - 15 */
+);
+
+/* Processing of gains */
+void SKP_Silk_process_gains_FIX(
+ SKP_Silk_encoder_state_FIX *psEnc, /* I/O Encoder state */
+ SKP_Silk_encoder_control_FIX *psEncCtrl /* I/O Encoder control */
+);
+
+/******************/
+/* Linear Algebra */
+/******************/
+/* Calculates correlation matrix X'*X */
+void SKP_Silk_corrMatrix_FIX(
+ const SKP_int16 *x, /* I x vector [L + order - 1] used to form data matrix X */
+ const SKP_int L, /* I Length of vectors */
+ const SKP_int order, /* I Max lag for correlation */
+ const SKP_int head_room, /* I Desired headroom */
+ SKP_int32 *XX, /* O Pointer to X'*X correlation matrix [ order x order ]*/
+ SKP_int *rshifts /* I/O Right shifts of correlations */
+);
+
+/* Calculates correlation vector X'*t */
+void SKP_Silk_corrVector_FIX(
+ const SKP_int16 *x, /* I x vector [L + order - 1] used to form data matrix X */
+ const SKP_int16 *t, /* I Target vector [L] */
+ const SKP_int L, /* I Length of vectors */
+ const SKP_int order, /* I Max lag for correlation */
+ SKP_int32 *Xt, /* O Pointer to X'*t correlation vector [order] */
+ const SKP_int rshifts /* I Right shifts of correlations */
+);
+
+/* Add noise to matrix diagonal */
+void SKP_Silk_regularize_correlations_FIX(
+ SKP_int32 *XX, /* I/O Correlation matrices */
+ SKP_int32 *xx, /* I/O Correlation values */
+ SKP_int32 noise, /* I Noise to add */
+ SKP_int D /* I Dimension of XX */
+);
+
+/* Solves Ax = b, assuming A is symmetric */
+void SKP_Silk_solve_LDL_FIX(
+ SKP_int32 *A, /* I Pointer to symetric square matrix A */
+ SKP_int M, /* I Size of matrix */
+ const SKP_int32 *b, /* I Pointer to b vector */
+ SKP_int32 *x_Q16 /* O Pointer to x solution vector */
+);
+
+#ifndef FORCE_CPP_BUILD
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* FORCE_CPP_BUILD */
+#endif /* SKP_SILK_MAIN_FIX_H */
--- /dev/null
+++ b/src_FIX/SKP_Silk_noise_shape_analysis_FIX.c
@@ -1,0 +1,433 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FIX.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+/* Compute gain to make warped filter coefficients have a zero mean log frequency response on a */
+/* non-warped frequency scale. (So that it can be implemented with a minimum-phase monic filter.) */
+SKP_INLINE SKP_int32 warped_gain( // gain in Q16
+ const SKP_int32 *coefs_Q24,
+ SKP_int lambda_Q16,
+ SKP_int order
+) {
+ SKP_int i;
+ SKP_int32 gain_Q24;
+
+ lambda_Q16 = -lambda_Q16;
+ gain_Q24 = coefs_Q24[ order - 1 ];
+ for( i = order - 2; i >= 0; i-- ) {
+ gain_Q24 = SKP_SMLAWB( coefs_Q24[ i ], gain_Q24, lambda_Q16 );
+ }
+ gain_Q24 = SKP_SMLAWB( SKP_FIX_CONST( 1.0, 24 ), gain_Q24, -lambda_Q16 );
+ return SKP_INVERSE32_varQ( gain_Q24, 40 );
+}
+
+/* Convert warped filter coefficients to monic pseudo-warped coefficients and limit maximum */
+/* amplitude of monic warped coefficients by using bandwidth expansion on the true coefficients */
+SKP_INLINE void limit_warped_coefs(
+ SKP_int32 *coefs_syn_Q24,
+ SKP_int32 *coefs_ana_Q24,
+ SKP_int lambda_Q16,
+ SKP_int32 limit_Q24,
+ SKP_int order
+) {
+ SKP_int i, iter, ind = 0;
+ SKP_int32 tmp, maxabs_Q24, chirp_Q16, gain_syn_Q16, gain_ana_Q16;
+ SKP_int32 nom_Q16, den_Q24;
+
+ /* Convert to monic coefficients */
+ lambda_Q16 = -lambda_Q16;
+ for( i = order - 1; i > 0; i-- ) {
+ coefs_syn_Q24[ i - 1 ] = SKP_SMLAWB( coefs_syn_Q24[ i - 1 ], coefs_syn_Q24[ i ], lambda_Q16 );
+ coefs_ana_Q24[ i - 1 ] = SKP_SMLAWB( coefs_ana_Q24[ i - 1 ], coefs_ana_Q24[ i ], lambda_Q16 );
+ }
+ lambda_Q16 = -lambda_Q16;
+ nom_Q16 = SKP_SMLAWB( SKP_FIX_CONST( 1.0, 16 ), -lambda_Q16, lambda_Q16 );
+ den_Q24 = SKP_SMLAWB( SKP_FIX_CONST( 1.0, 24 ), coefs_syn_Q24[ 0 ], lambda_Q16 );
+ gain_syn_Q16 = SKP_DIV32_varQ( nom_Q16, den_Q24, 24 );
+ den_Q24 = SKP_SMLAWB( SKP_FIX_CONST( 1.0, 24 ), coefs_ana_Q24[ 0 ], lambda_Q16 );
+ gain_ana_Q16 = SKP_DIV32_varQ( nom_Q16, den_Q24, 24 );
+ for( i = 0; i < order; i++ ) {
+ coefs_syn_Q24[ i ] = SKP_SMULWW( gain_syn_Q16, coefs_syn_Q24[ i ] );
+ coefs_ana_Q24[ i ] = SKP_SMULWW( gain_ana_Q16, coefs_ana_Q24[ i ] );
+ }
+
+ for( iter = 0; iter < 10; iter++ ) {
+ /* Find maximum absolute value */
+ maxabs_Q24 = -1;
+ for( i = 0; i < order; i++ ) {
+ tmp = SKP_max( SKP_abs_int32( coefs_syn_Q24[ i ] ), SKP_abs_int32( coefs_ana_Q24[ i ] ) );
+ if( tmp > maxabs_Q24 ) {
+ maxabs_Q24 = tmp;
+ ind = i;
+ }
+ }
+ if( maxabs_Q24 <= limit_Q24 ) {
+ /* Coefficients are within range - done */
+ return;
+ }
+
+ /* Convert back to true warped coefficients */
+ for( i = 1; i < order; i++ ) {
+ coefs_syn_Q24[ i - 1 ] = SKP_SMLAWB( coefs_syn_Q24[ i - 1 ], coefs_syn_Q24[ i ], lambda_Q16 );
+ coefs_ana_Q24[ i - 1 ] = SKP_SMLAWB( coefs_ana_Q24[ i - 1 ], coefs_ana_Q24[ i ], lambda_Q16 );
+ }
+ gain_syn_Q16 = SKP_INVERSE32_varQ( gain_syn_Q16, 32 );
+ gain_ana_Q16 = SKP_INVERSE32_varQ( gain_ana_Q16, 32 );
+ for( i = 0; i < order; i++ ) {
+ coefs_syn_Q24[ i ] = SKP_SMULWW( gain_syn_Q16, coefs_syn_Q24[ i ] );
+ coefs_ana_Q24[ i ] = SKP_SMULWW( gain_ana_Q16, coefs_ana_Q24[ i ] );
+ }
+
+ /* Apply bandwidth expansion */
+ chirp_Q16 = SKP_FIX_CONST( 0.99, 16 ) - SKP_DIV32_varQ(
+ SKP_SMULWB( maxabs_Q24 - limit_Q24, SKP_SMLABB( SKP_FIX_CONST( 0.8, 10 ), SKP_FIX_CONST( 0.1, 10 ), iter ) ),
+ SKP_MUL( maxabs_Q24, ind + 1 ), 22 );
+ SKP_Silk_bwexpander_32( coefs_syn_Q24, order, chirp_Q16 );
+ SKP_Silk_bwexpander_32( coefs_ana_Q24, order, chirp_Q16 );
+
+ /* Convert to monic warped coefficients */
+ lambda_Q16 = -lambda_Q16;
+ for( i = order - 1; i > 0; i-- ) {
+ coefs_syn_Q24[ i - 1 ] = SKP_SMLAWB( coefs_syn_Q24[ i - 1 ], coefs_syn_Q24[ i ], lambda_Q16 );
+ coefs_ana_Q24[ i - 1 ] = SKP_SMLAWB( coefs_ana_Q24[ i - 1 ], coefs_ana_Q24[ i ], lambda_Q16 );
+ }
+ lambda_Q16 = -lambda_Q16;
+ nom_Q16 = SKP_SMLAWB( SKP_FIX_CONST( 1.0, 16 ), -lambda_Q16, lambda_Q16 );
+ den_Q24 = SKP_SMLAWB( SKP_FIX_CONST( 1.0, 24 ), coefs_syn_Q24[ 0 ], lambda_Q16 );
+ gain_syn_Q16 = SKP_DIV32_varQ( nom_Q16, den_Q24, 24 );
+ den_Q24 = SKP_SMLAWB( SKP_FIX_CONST( 1.0, 24 ), coefs_ana_Q24[ 0 ], lambda_Q16 );
+ gain_ana_Q16 = SKP_DIV32_varQ( nom_Q16, den_Q24, 24 );
+ for( i = 0; i < order; i++ ) {
+ coefs_syn_Q24[ i ] = SKP_SMULWW( gain_syn_Q16, coefs_syn_Q24[ i ] );
+ coefs_ana_Q24[ i ] = SKP_SMULWW( gain_ana_Q16, coefs_ana_Q24[ i ] );
+ }
+ }
+ SKP_assert( 0 );
+}
+
+/**************************************************************/
+/* Compute noise shaping coefficients and initial gain values */
+/**************************************************************/
+void SKP_Silk_noise_shape_analysis_FIX(
+ SKP_Silk_encoder_state_FIX *psEnc, /* I/O Encoder state FIX */
+ SKP_Silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control FIX */
+ const SKP_int16 *pitch_res, /* I LPC residual from pitch analysis */
+ const SKP_int16 *x /* I Input signal [ frame_length + la_shape ] */
+)
+{
+ SKP_Silk_shape_state_FIX *psShapeSt = &psEnc->sShape;
+ SKP_int k, i, nSamples, Qnrg, b_Q14, warping_Q16, scale = 0;
+ SKP_int32 SNR_adj_dB_Q7, HarmBoost_Q16, HarmShapeGain_Q16, Tilt_Q16, tmp32;
+ SKP_int32 nrg, pre_nrg_Q30, log_energy_Q7, log_energy_prev_Q7, energy_variation_Q7;
+ SKP_int32 delta_Q16, BWExp1_Q16, BWExp2_Q16, gain_mult_Q16, gain_add_Q16, strength_Q16, b_Q8;
+ SKP_int32 auto_corr[ MAX_SHAPE_LPC_ORDER + 1 ];
+ SKP_int32 refl_coef_Q16[ MAX_SHAPE_LPC_ORDER ];
+ SKP_int32 AR1_Q24[ MAX_SHAPE_LPC_ORDER ];
+ SKP_int32 AR2_Q24[ MAX_SHAPE_LPC_ORDER ];
+ SKP_int16 x_windowed[ SHAPE_LPC_WIN_MAX ];
+ SKP_int32 sqrt_nrg[ MAX_NB_SUBFR ], Qnrg_vec[ MAX_NB_SUBFR ];
+ const SKP_int16 *x_ptr, *pitch_res_ptr;
+
+ /* Point to start of first LPC analysis block */
+ x_ptr = x - psEnc->sCmn.la_shape;
+
+ /****************/
+ /* GAIN CONTROL */
+ /****************/
+ SNR_adj_dB_Q7 = psEnc->sCmn.SNR_dB_Q7;
+
+ /* Input quality is the average of the quality in the lowest two VAD bands */
+ psEncCtrl->input_quality_Q14 = ( SKP_int )SKP_RSHIFT( ( SKP_int32 )psEnc->sCmn.input_quality_bands_Q15[ 0 ]
+ + psEnc->sCmn.input_quality_bands_Q15[ 1 ], 2 );
+
+ /* Coding quality level, between 0.0_Q0 and 1.0_Q0, but in Q14 */
+ psEncCtrl->coding_quality_Q14 = SKP_RSHIFT( SKP_Silk_sigm_Q15( SKP_RSHIFT_ROUND( SNR_adj_dB_Q7 -
+ SKP_FIX_CONST( 18.0, 7 ), 4 ) ), 1 );
+
+ /* Reduce coding SNR during low speech activity */
+ if( psEnc->sCmn.useCBR == 0 ) {
+ b_Q8 = SKP_FIX_CONST( 1.0, 8 ) - psEnc->sCmn.speech_activity_Q8;
+ b_Q8 = SKP_SMULWB( SKP_LSHIFT( b_Q8, 8 ), b_Q8 );
+ SNR_adj_dB_Q7 = SKP_SMLAWB( SNR_adj_dB_Q7,
+ SKP_SMULBB( SKP_FIX_CONST( -BG_SNR_DECR_dB, 7 ) >> ( 4 + 1 ), b_Q8 ), // Q11
+ SKP_SMULWB( SKP_FIX_CONST( 1.0, 14 ) + psEncCtrl->input_quality_Q14, psEncCtrl->coding_quality_Q14 ) ); // Q12
+ }
+
+ if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
+ /* Reduce gains for periodic signals */
+ SNR_adj_dB_Q7 = SKP_SMLAWB( SNR_adj_dB_Q7, SKP_FIX_CONST( HARM_SNR_INCR_dB, 8 ), psEnc->LTPCorr_Q15 );
+ } else {
+ /* For unvoiced signals and low-quality input, adjust the quality slower than SNR_dB setting */
+ SNR_adj_dB_Q7 = SKP_SMLAWB( SNR_adj_dB_Q7,
+ SKP_SMLAWB( SKP_FIX_CONST( 6.0, 9 ), -SKP_FIX_CONST( 0.4, 18 ), psEnc->sCmn.SNR_dB_Q7 ),
+ SKP_FIX_CONST( 1.0, 14 ) - psEncCtrl->input_quality_Q14 );
+ }
+
+ /*************************/
+ /* SPARSENESS PROCESSING */
+ /*************************/
+ /* Set quantizer offset */
+ if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
+ /* Initally set to 0; may be overruled in process_gains(..) */
+ psEnc->sCmn.indices.quantOffsetType = 0;
+ psEncCtrl->sparseness_Q8 = 0;
+ } else {
+ /* Sparseness measure, based on relative fluctuations of energy per 2 milliseconds */
+ nSamples = SKP_LSHIFT( psEnc->sCmn.fs_kHz, 1 );
+ energy_variation_Q7 = 0;
+ log_energy_prev_Q7 = 0;
+ pitch_res_ptr = pitch_res;
+ for( k = 0; k < SKP_SMULBB( SUB_FRAME_LENGTH_MS, psEnc->sCmn.nb_subfr ) / 2; k++ ) {
+ SKP_Silk_sum_sqr_shift( &nrg, &scale, pitch_res_ptr, nSamples );
+ nrg += SKP_RSHIFT( nSamples, scale ); // Q(-scale)
+
+ log_energy_Q7 = SKP_Silk_lin2log( nrg );
+ if( k > 0 ) {
+ energy_variation_Q7 += SKP_abs( log_energy_Q7 - log_energy_prev_Q7 );
+ }
+ log_energy_prev_Q7 = log_energy_Q7;
+ pitch_res_ptr += nSamples;
+ }
+
+ psEncCtrl->sparseness_Q8 = SKP_RSHIFT( SKP_Silk_sigm_Q15( SKP_SMULWB( energy_variation_Q7 -
+ SKP_FIX_CONST( 5.0, 7 ), SKP_FIX_CONST( 0.1, 16 ) ) ), 7 );
+
+ /* Set quantization offset depending on sparseness measure */
+ if( psEncCtrl->sparseness_Q8 > SKP_FIX_CONST( SPARSENESS_THRESHOLD_QNT_OFFSET, 8 ) ) {
+ psEnc->sCmn.indices.quantOffsetType = 0;
+ } else {
+ psEnc->sCmn.indices.quantOffsetType = 1;
+ }
+
+ /* Increase coding SNR for sparse signals */
+ SNR_adj_dB_Q7 = SKP_SMLAWB( SNR_adj_dB_Q7, SKP_FIX_CONST( SPARSE_SNR_INCR_dB, 15 ), psEncCtrl->sparseness_Q8 - SKP_FIX_CONST( 0.5, 8 ) );
+ }
+
+ /*******************************/
+ /* Control bandwidth expansion */
+ /*******************************/
+ /* More BWE for signals with high prediction gain */
+ strength_Q16 = SKP_SMULWB( psEncCtrl->predGain_Q16, SKP_FIX_CONST( FIND_PITCH_WHITE_NOISE_FRACTION, 16 ) );
+ BWExp1_Q16 = BWExp2_Q16 = SKP_DIV32_varQ( SKP_FIX_CONST( BANDWIDTH_EXPANSION, 16 ),
+ SKP_SMLAWW( SKP_FIX_CONST( 1.0, 16 ), strength_Q16, strength_Q16 ), 16 );
+ delta_Q16 = SKP_SMULWB( SKP_FIX_CONST( 1.0, 16 ) - SKP_SMULBB( 3, psEncCtrl->coding_quality_Q14 ),
+ SKP_FIX_CONST( LOW_RATE_BANDWIDTH_EXPANSION_DELTA, 16 ) );
+ BWExp1_Q16 = SKP_SUB32( BWExp1_Q16, delta_Q16 );
+ BWExp2_Q16 = SKP_ADD32( BWExp2_Q16, delta_Q16 );
+ /* BWExp1 will be applied after BWExp2, so make it relative */
+ BWExp1_Q16 = SKP_DIV32_16( SKP_LSHIFT( BWExp1_Q16, 14 ), SKP_RSHIFT( BWExp2_Q16, 2 ) );
+
+ if( psEnc->sCmn.warping_Q16 > 0 ) {
+ /* Slightly more warping in analysis will move quantization noise up in frequency, where it's better masked */
+ warping_Q16 = SKP_SMLAWB( psEnc->sCmn.warping_Q16, psEncCtrl->coding_quality_Q14, SKP_FIX_CONST( 0.01, 18 ) );
+ } else {
+ warping_Q16 = 0;
+ }
+
+ /********************************************/
+ /* Compute noise shaping AR coefs and gains */
+ /********************************************/
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ /* Apply window: sine slope followed by flat part followed by cosine slope */
+ SKP_int shift, slope_part, flat_part;
+ flat_part = psEnc->sCmn.fs_kHz * 3;
+ slope_part = SKP_RSHIFT( psEnc->sCmn.shapeWinLength - flat_part, 1 );
+
+ SKP_Silk_apply_sine_window( x_windowed, x_ptr, 1, slope_part );
+ shift = slope_part;
+ SKP_memcpy( x_windowed + shift, x_ptr + shift, flat_part * sizeof(SKP_int16) );
+ shift += flat_part;
+ SKP_Silk_apply_sine_window( x_windowed + shift, x_ptr + shift, 2, slope_part );
+
+ /* Update pointer: next LPC analysis block */
+ x_ptr += psEnc->sCmn.subfr_length;
+
+ if( psEnc->sCmn.warping_Q16 > 0 ) {
+ /* Calculate warped auto correlation */
+ SKP_Silk_warped_autocorrelation_FIX( auto_corr, &scale, x_windowed, warping_Q16, psEnc->sCmn.shapeWinLength, psEnc->sCmn.shapingLPCOrder );
+ } else {
+ /* Calculate regular auto correlation */
+ SKP_Silk_autocorr( auto_corr, &scale, x_windowed, psEnc->sCmn.shapeWinLength, psEnc->sCmn.shapingLPCOrder + 1 );
+ }
+
+ /* Add white noise, as a fraction of energy */
+ auto_corr[0] = SKP_ADD32( auto_corr[0], SKP_max_32( SKP_SMULWB( SKP_RSHIFT( auto_corr[ 0 ], 4 ),
+ SKP_FIX_CONST( SHAPE_WHITE_NOISE_FRACTION, 20 ) ), 1 ) );
+
+ /* Calculate the reflection coefficients using schur */
+ nrg = SKP_Silk_schur64( refl_coef_Q16, auto_corr, psEnc->sCmn.shapingLPCOrder );
+ SKP_assert( nrg >= 0 );
+
+ /* Convert reflection coefficients to prediction coefficients */
+ SKP_Silk_k2a_Q16( AR2_Q24, refl_coef_Q16, psEnc->sCmn.shapingLPCOrder );
+
+ Qnrg = -scale; // range: -12...30
+ SKP_assert( Qnrg >= -12 );
+ SKP_assert( Qnrg <= 30 );
+
+ /* Make sure that Qnrg is an even number */
+ if( Qnrg & 1 ) {
+ Qnrg -= 1;
+ nrg >>= 1;
+ }
+
+ tmp32 = SKP_Silk_SQRT_APPROX( nrg );
+ Qnrg >>= 1; // range: -6...15
+
+ sqrt_nrg[ k ] = tmp32;
+ Qnrg_vec[ k ] = Qnrg;
+
+ psEncCtrl->Gains_Q16[ k ] = SKP_LSHIFT_SAT32( tmp32, 16 - Qnrg );
+
+ if( psEnc->sCmn.warping_Q16 > 0 ) {
+ /* Adjust gain for warping */
+ gain_mult_Q16 = warped_gain( AR2_Q24, warping_Q16, psEnc->sCmn.shapingLPCOrder );
+ psEncCtrl->Gains_Q16[ k ] = SKP_SMULWW( psEncCtrl->Gains_Q16[ k ], gain_mult_Q16 );
+ }
+
+ /* Bandwidth expansion for synthesis filter shaping */
+ SKP_Silk_bwexpander_32( AR2_Q24, psEnc->sCmn.shapingLPCOrder, BWExp2_Q16 );
+
+ /* Compute noise shaping filter coefficients */
+ SKP_memcpy( AR1_Q24, AR2_Q24, psEnc->sCmn.shapingLPCOrder * sizeof( SKP_int32 ) );
+
+ /* Bandwidth expansion for analysis filter shaping */
+ SKP_assert( BWExp1_Q16 <= SKP_FIX_CONST( 1.0, 16 ) );
+ SKP_Silk_bwexpander_32( AR1_Q24, psEnc->sCmn.shapingLPCOrder, BWExp1_Q16 );
+
+ /* Ratio of prediction gains, in energy domain */
+ SKP_Silk_LPC_inverse_pred_gain_Q24( &pre_nrg_Q30, AR2_Q24, psEnc->sCmn.shapingLPCOrder );
+ SKP_Silk_LPC_inverse_pred_gain_Q24( &nrg, AR1_Q24, psEnc->sCmn.shapingLPCOrder );
+
+ //psEncCtrl->GainsPre[ k ] = 1.0f - 0.7f * ( 1.0f - pre_nrg / nrg ) = 0.3f + 0.7f * pre_nrg / nrg;
+ pre_nrg_Q30 = SKP_LSHIFT32( SKP_SMULWB( pre_nrg_Q30, SKP_FIX_CONST( 0.7, 15 ) ), 1 );
+ psEncCtrl->GainsPre_Q14[ k ] = ( SKP_int ) SKP_FIX_CONST( 0.3, 14 ) + SKP_DIV32_varQ( pre_nrg_Q30, nrg, 14 );
+
+ /* Convert to monic warped prediction coefficients and limit absolute values */
+ limit_warped_coefs( AR2_Q24, AR1_Q24, warping_Q16, SKP_FIX_CONST( 3.999, 24 ), psEnc->sCmn.shapingLPCOrder );
+
+ /* Convert from Q24 to Q13 and store in int16 */
+ for( i = 0; i < psEnc->sCmn.shapingLPCOrder; i++ ) {
+ psEncCtrl->AR1_Q13[ k * MAX_SHAPE_LPC_ORDER + i ] = (SKP_int16)SKP_SAT16( SKP_RSHIFT_ROUND( AR1_Q24[ i ], 11 ) );
+ psEncCtrl->AR2_Q13[ k * MAX_SHAPE_LPC_ORDER + i ] = (SKP_int16)SKP_SAT16( SKP_RSHIFT_ROUND( AR2_Q24[ i ], 11 ) );
+ }
+ }
+
+ /*****************/
+ /* Gain tweaking */
+ /*****************/
+ /* Increase gains during low speech activity and put lower limit on gains */
+ gain_mult_Q16 = SKP_Silk_log2lin( -SKP_SMLAWB( -SKP_FIX_CONST( 16.0, 7 ), SNR_adj_dB_Q7, SKP_FIX_CONST( 0.16, 16 ) ) );
+ gain_add_Q16 = SKP_Silk_log2lin( SKP_SMLAWB( SKP_FIX_CONST( 16.0, 7 ), SKP_FIX_CONST( MIN_QGAIN_DB, 7 ), SKP_FIX_CONST( 0.16, 16 ) ) );
+ SKP_assert( gain_mult_Q16 > 0 );
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ psEncCtrl->Gains_Q16[ k ] = SKP_SMULWW( psEncCtrl->Gains_Q16[ k ], gain_mult_Q16 );
+ SKP_assert( psEncCtrl->Gains_Q16[ k ] >= 0 );
+ psEncCtrl->Gains_Q16[ k ] = SKP_ADD_POS_SAT32( psEncCtrl->Gains_Q16[ k ], gain_add_Q16 );
+ }
+
+ gain_mult_Q16 = SKP_FIX_CONST( 1.0, 16 ) + SKP_RSHIFT_ROUND( SKP_MLA( SKP_FIX_CONST( INPUT_TILT, 26 ),
+ psEncCtrl->coding_quality_Q14, SKP_FIX_CONST( HIGH_RATE_INPUT_TILT, 12 ) ), 10 );
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ psEncCtrl->GainsPre_Q14[ k ] = SKP_SMULWB( gain_mult_Q16, psEncCtrl->GainsPre_Q14[ k ] );
+ }
+
+ /************************************************/
+ /* Control low-frequency shaping and noise tilt */
+ /************************************************/
+ /* Less low frequency shaping for noisy inputs */
+ strength_Q16 = SKP_MUL( SKP_FIX_CONST( LOW_FREQ_SHAPING, 4 ), SKP_SMLAWB( SKP_FIX_CONST( 1.0, 12 ),
+ SKP_FIX_CONST( LOW_QUALITY_LOW_FREQ_SHAPING_DECR, 13 ), psEnc->sCmn.input_quality_bands_Q15[ 0 ] - SKP_FIX_CONST( 1.0, 15 ) ) );
+ strength_Q16 = SKP_RSHIFT( SKP_MUL( strength_Q16, psEnc->sCmn.speech_activity_Q8 ), 8 );
+ if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
+ /* Reduce low frequencies quantization noise for periodic signals, depending on pitch lag */
+ /*f = 400; freqz([1, -0.98 + 2e-4 * f], [1, -0.97 + 7e-4 * f], 2^12, Fs); axis([0, 1000, -10, 1])*/
+ SKP_int fs_kHz_inv = SKP_DIV32_16( SKP_FIX_CONST( 0.2, 14 ), psEnc->sCmn.fs_kHz );
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ b_Q14 = fs_kHz_inv + SKP_DIV32_16( SKP_FIX_CONST( 3.0, 14 ), psEncCtrl->pitchL[ k ] );
+ /* Pack two coefficients in one int32 */
+ psEncCtrl->LF_shp_Q14[ k ] = SKP_LSHIFT( SKP_FIX_CONST( 1.0, 14 ) - b_Q14 - SKP_SMULWB( strength_Q16, b_Q14 ), 16 );
+ psEncCtrl->LF_shp_Q14[ k ] |= (SKP_uint16)( b_Q14 - SKP_FIX_CONST( 1.0, 14 ) );
+ }
+ SKP_assert( SKP_FIX_CONST( HARM_HP_NOISE_COEF, 24 ) < SKP_FIX_CONST( 0.5, 24 ) ); // Guarantees that second argument to SMULWB() is within range of an SKP_int16
+ Tilt_Q16 = - SKP_FIX_CONST( HP_NOISE_COEF, 16 ) -
+ SKP_SMULWB( SKP_FIX_CONST( 1.0, 16 ) - SKP_FIX_CONST( HP_NOISE_COEF, 16 ),
+ SKP_SMULWB( SKP_FIX_CONST( HARM_HP_NOISE_COEF, 24 ), psEnc->sCmn.speech_activity_Q8 ) );
+ } else {
+ b_Q14 = SKP_DIV32_16( 21299, psEnc->sCmn.fs_kHz ); // 1.3_Q0 = 21299_Q14
+ /* Pack two coefficients in one int32 */
+ psEncCtrl->LF_shp_Q14[ 0 ] = SKP_LSHIFT( SKP_FIX_CONST( 1.0, 14 ) - b_Q14 -
+ SKP_SMULWB( strength_Q16, SKP_SMULWB( SKP_FIX_CONST( 0.6, 16 ), b_Q14 ) ), 16 );
+ psEncCtrl->LF_shp_Q14[ 0 ] |= (SKP_uint16)( b_Q14 - SKP_FIX_CONST( 1.0, 14 ) );
+ for( k = 1; k < psEnc->sCmn.nb_subfr; k++ ) {
+ psEncCtrl->LF_shp_Q14[ k ] = psEncCtrl->LF_shp_Q14[ 0 ];
+ }
+ Tilt_Q16 = -SKP_FIX_CONST( HP_NOISE_COEF, 16 );
+ }
+
+ /****************************/
+ /* HARMONIC SHAPING CONTROL */
+ /****************************/
+ /* Control boosting of harmonic frequencies */
+ HarmBoost_Q16 = SKP_SMULWB( SKP_SMULWB( SKP_FIX_CONST( 1.0, 17 ) - SKP_LSHIFT( psEncCtrl->coding_quality_Q14, 3 ),
+ psEnc->LTPCorr_Q15 ), SKP_FIX_CONST( LOW_RATE_HARMONIC_BOOST, 16 ) );
+
+ /* More harmonic boost for noisy input signals */
+ HarmBoost_Q16 = SKP_SMLAWB( HarmBoost_Q16,
+ SKP_FIX_CONST( 1.0, 16 ) - SKP_LSHIFT( psEncCtrl->input_quality_Q14, 2 ), SKP_FIX_CONST( LOW_INPUT_QUALITY_HARMONIC_BOOST, 16 ) );
+
+ if( USE_HARM_SHAPING && psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
+ /* More harmonic noise shaping for high bitrates or noisy input */
+ HarmShapeGain_Q16 = SKP_SMLAWB( SKP_FIX_CONST( HARMONIC_SHAPING, 16 ),
+ SKP_FIX_CONST( 1.0, 16 ) - SKP_SMULWB( SKP_FIX_CONST( 1.0, 18 ) - SKP_LSHIFT( psEncCtrl->coding_quality_Q14, 4 ),
+ psEncCtrl->input_quality_Q14 ), SKP_FIX_CONST( HIGH_RATE_OR_LOW_QUALITY_HARMONIC_SHAPING, 16 ) );
+
+ /* Less harmonic noise shaping for less periodic signals */
+ HarmShapeGain_Q16 = SKP_SMULWB( SKP_LSHIFT( HarmShapeGain_Q16, 1 ),
+ SKP_Silk_SQRT_APPROX( SKP_LSHIFT( psEnc->LTPCorr_Q15, 15 ) ) );
+ } else {
+ HarmShapeGain_Q16 = 0;
+ }
+
+ /*************************/
+ /* Smooth over subframes */
+ /*************************/
+ for( k = 0; k < MAX_NB_SUBFR; k++ ) {
+ psShapeSt->HarmBoost_smth_Q16 =
+ SKP_SMLAWB( psShapeSt->HarmBoost_smth_Q16, HarmBoost_Q16 - psShapeSt->HarmBoost_smth_Q16, SKP_FIX_CONST( SUBFR_SMTH_COEF, 16 ) );
+ psShapeSt->HarmShapeGain_smth_Q16 =
+ SKP_SMLAWB( psShapeSt->HarmShapeGain_smth_Q16, HarmShapeGain_Q16 - psShapeSt->HarmShapeGain_smth_Q16, SKP_FIX_CONST( SUBFR_SMTH_COEF, 16 ) );
+ psShapeSt->Tilt_smth_Q16 =
+ SKP_SMLAWB( psShapeSt->Tilt_smth_Q16, Tilt_Q16 - psShapeSt->Tilt_smth_Q16, SKP_FIX_CONST( SUBFR_SMTH_COEF, 16 ) );
+
+ psEncCtrl->HarmBoost_Q14[ k ] = ( SKP_int )SKP_RSHIFT_ROUND( psShapeSt->HarmBoost_smth_Q16, 2 );
+ psEncCtrl->HarmShapeGain_Q14[ k ] = ( SKP_int )SKP_RSHIFT_ROUND( psShapeSt->HarmShapeGain_smth_Q16, 2 );
+ psEncCtrl->Tilt_Q14[ k ] = ( SKP_int )SKP_RSHIFT_ROUND( psShapeSt->Tilt_smth_Q16, 2 );
+ }
+}
--- /dev/null
+++ b/src_FIX/SKP_Silk_prefilter_FIX.c
@@ -1,0 +1,201 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FIX.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+/* SKP_Silk_prefilter. Prefilter for finding Quantizer input signal */
+SKP_INLINE void SKP_Silk_prefilt_FIX(
+ SKP_Silk_prefilter_state_FIX *P, /* I/O state */
+ SKP_int32 st_res_Q12[], /* I short term residual signal */
+ SKP_int16 xw[], /* O prefiltered signal */
+ SKP_int32 HarmShapeFIRPacked_Q12, /* I Harmonic shaping coeficients */
+ SKP_int Tilt_Q14, /* I Tilt shaping coeficient */
+ SKP_int32 LF_shp_Q14, /* I Low-frequancy shaping coeficients*/
+ SKP_int lag, /* I Lag for harmonic shaping */
+ SKP_int length /* I Length of signals */
+);
+
+void SKP_Silk_warped_LPC_analysis_filter_FIX(
+ SKP_int32 state[], /* I/O State [order + 1] */
+ SKP_int16 res[], /* O Residual signal [length] */
+ const SKP_int16 coef_Q13[], /* I Coefficients [order] */
+ const SKP_int16 input[], /* I Input signal [length] */
+ const SKP_int16 lambda_Q16, /* I Warping factor */
+ const SKP_int length, /* I Length of input signal */
+ const SKP_int order /* I Filter order (even) */
+)
+{
+ SKP_int n, i;
+ SKP_int32 acc_Q11, tmp1, tmp2;
+
+ /* Order must be even */
+ SKP_assert( ( order & 1 ) == 0 );
+
+ for( n = 0; n < length; n++ ) {
+ /* Output of lowpass section */
+ tmp2 = SKP_SMLAWB( state[ 0 ], state[ 1 ], lambda_Q16 );
+ state[ 0 ] = SKP_LSHIFT( input[ n ], 14 );
+ /* Output of allpass section */
+ tmp1 = SKP_SMLAWB( state[ 1 ], state[ 2 ] - tmp2, lambda_Q16 );
+ state[ 1 ] = tmp2;
+ acc_Q11 = SKP_SMULWB( tmp2, coef_Q13[ 0 ] );
+ /* Loop over allpass sections */
+ for( i = 2; i < order; i += 2 ) {
+ /* Output of allpass section */
+ tmp2 = SKP_SMLAWB( state[ i ], state[ i + 1 ] - tmp1, lambda_Q16 );
+ state[ i ] = tmp1;
+ acc_Q11 = SKP_SMLAWB( acc_Q11, tmp1, coef_Q13[ i - 1 ] );
+ /* Output of allpass section */
+ tmp1 = SKP_SMLAWB( state[ i + 1 ], state[ i + 2 ] - tmp2, lambda_Q16 );
+ state[ i + 1 ] = tmp2;
+ acc_Q11 = SKP_SMLAWB( acc_Q11, tmp2, coef_Q13[ i ] );
+ }
+ state[ order ] = tmp1;
+ acc_Q11 = SKP_SMLAWB( acc_Q11, tmp1, coef_Q13[ order - 1 ] );
+ res[ n ] = ( SKP_int16 )SKP_SAT16( ( SKP_int32 )input[ n ] - SKP_RSHIFT_ROUND( acc_Q11, 11 ) );
+ }
+}
+
+void SKP_Silk_prefilter_FIX(
+ SKP_Silk_encoder_state_FIX *psEnc, /* I/O Encoder state FIX */
+ const SKP_Silk_encoder_control_FIX *psEncCtrl, /* I Encoder control FIX */
+ SKP_int16 xw[], /* O Weighted signal */
+ const SKP_int16 x[] /* I Speech signal */
+)
+{
+ SKP_Silk_prefilter_state_FIX *P = &psEnc->sPrefilt;
+ SKP_int j, k, lag;
+ SKP_int32 tmp_32;
+ const SKP_int16 *AR1_shp_Q13;
+ const SKP_int16 *px;
+ SKP_int16 *pxw;
+ SKP_int HarmShapeGain_Q12, Tilt_Q14;
+ SKP_int32 HarmShapeFIRPacked_Q12, LF_shp_Q14;
+ SKP_int32 x_filt_Q12[ MAX_FRAME_LENGTH / MAX_NB_SUBFR ];
+ SKP_int16 st_res[ ( MAX_FRAME_LENGTH / MAX_NB_SUBFR ) + MAX_LPC_ORDER ];
+ SKP_int16 B_Q12[ 2 ];
+
+ /* Setup pointers */
+ px = x;
+ pxw = xw;
+ lag = P->lagPrev;
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ /* Update Variables that change per sub frame */
+ if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
+ lag = psEncCtrl->pitchL[ k ];
+ }
+
+ /* Noise shape parameters */
+ HarmShapeGain_Q12 = SKP_SMULWB( psEncCtrl->HarmShapeGain_Q14[ k ], 16384 - psEncCtrl->HarmBoost_Q14[ k ] );
+ SKP_assert( HarmShapeGain_Q12 >= 0 );
+ HarmShapeFIRPacked_Q12 = SKP_RSHIFT( HarmShapeGain_Q12, 2 );
+ HarmShapeFIRPacked_Q12 |= SKP_LSHIFT( ( SKP_int32 )SKP_RSHIFT( HarmShapeGain_Q12, 1 ), 16 );
+ Tilt_Q14 = psEncCtrl->Tilt_Q14[ k ];
+ LF_shp_Q14 = psEncCtrl->LF_shp_Q14[ k ];
+ AR1_shp_Q13 = &psEncCtrl->AR1_Q13[ k * MAX_SHAPE_LPC_ORDER ];
+
+ /* Short term FIR filtering*/
+ SKP_Silk_warped_LPC_analysis_filter_FIX( P->sAR_shp, st_res, AR1_shp_Q13, px,
+ psEnc->sCmn.warping_Q16, psEnc->sCmn.subfr_length, psEnc->sCmn.shapingLPCOrder );
+
+ /* reduce (mainly) low frequencies during harmonic emphasis */
+ B_Q12[ 0 ] = SKP_RSHIFT_ROUND( psEncCtrl->GainsPre_Q14[ k ], 2 );
+ tmp_32 = SKP_SMLABB( SKP_FIX_CONST( INPUT_TILT, 26 ), psEncCtrl->HarmBoost_Q14[ k ], HarmShapeGain_Q12 ); /* Q26 */
+ tmp_32 = SKP_SMLABB( tmp_32, psEncCtrl->coding_quality_Q14, SKP_FIX_CONST( HIGH_RATE_INPUT_TILT, 12 ) ); /* Q26 */
+ tmp_32 = SKP_SMULWB( tmp_32, -psEncCtrl->GainsPre_Q14[ k ] ); /* Q24 */
+ tmp_32 = SKP_RSHIFT_ROUND( tmp_32, 12 ); /* Q12 */
+ B_Q12[ 1 ]= SKP_SAT16( tmp_32 );
+
+ x_filt_Q12[ 0 ] = SKP_SMLABB( SKP_SMULBB( st_res[ 0 ], B_Q12[ 0 ] ), P->sHarmHP, B_Q12[ 1 ] );
+ for( j = 1; j < psEnc->sCmn.subfr_length; j++ ) {
+ x_filt_Q12[ j ] = SKP_SMLABB( SKP_SMULBB( st_res[ j ], B_Q12[ 0 ] ), st_res[ j - 1 ], B_Q12[ 1 ] );
+ }
+ P->sHarmHP = st_res[ psEnc->sCmn.subfr_length - 1 ];
+
+ SKP_Silk_prefilt_FIX( P, x_filt_Q12, pxw, HarmShapeFIRPacked_Q12, Tilt_Q14,
+ LF_shp_Q14, lag, psEnc->sCmn.subfr_length );
+
+ px += psEnc->sCmn.subfr_length;
+ pxw += psEnc->sCmn.subfr_length;
+ }
+
+ P->lagPrev = psEncCtrl->pitchL[ MAX_NB_SUBFR - 1 ];
+}
+
+/* SKP_Silk_prefilter. Prefilter for finding Quantizer input signal */
+SKP_INLINE void SKP_Silk_prefilt_FIX(
+ SKP_Silk_prefilter_state_FIX *P, /* I/O state */
+ SKP_int32 st_res_Q12[], /* I short term residual signal */
+ SKP_int16 xw[], /* O prefiltered signal */
+ SKP_int32 HarmShapeFIRPacked_Q12, /* I Harmonic shaping coeficients */
+ SKP_int Tilt_Q14, /* I Tilt shaping coeficient */
+ SKP_int32 LF_shp_Q14, /* I Low-frequancy shaping coeficients*/
+ SKP_int lag, /* I Lag for harmonic shaping */
+ SKP_int length /* I Length of signals */
+)
+{
+ SKP_int i, idx, LTP_shp_buf_idx;
+ SKP_int32 n_LTP_Q12, n_Tilt_Q10, n_LF_Q10;
+ SKP_int32 sLF_MA_shp_Q12, sLF_AR_shp_Q12;
+ SKP_int16 *LTP_shp_buf;
+
+ /* To speed up use temp variables instead of using the struct */
+ LTP_shp_buf = P->sLTP_shp;
+ LTP_shp_buf_idx = P->sLTP_shp_buf_idx;
+ sLF_AR_shp_Q12 = P->sLF_AR_shp_Q12;
+ sLF_MA_shp_Q12 = P->sLF_MA_shp_Q12;
+
+ for( i = 0; i < length; i++ ) {
+ if( lag > 0 ) {
+ /* unrolled loop */
+ SKP_assert( HARM_SHAPE_FIR_TAPS == 3 );
+ idx = lag + LTP_shp_buf_idx;
+ n_LTP_Q12 = SKP_SMULBB( LTP_shp_buf[ ( idx - HARM_SHAPE_FIR_TAPS / 2 - 1) & LTP_MASK ], HarmShapeFIRPacked_Q12 );
+ n_LTP_Q12 = SKP_SMLABT( n_LTP_Q12, LTP_shp_buf[ ( idx - HARM_SHAPE_FIR_TAPS / 2 ) & LTP_MASK ], HarmShapeFIRPacked_Q12 );
+ n_LTP_Q12 = SKP_SMLABB( n_LTP_Q12, LTP_shp_buf[ ( idx - HARM_SHAPE_FIR_TAPS / 2 + 1) & LTP_MASK ], HarmShapeFIRPacked_Q12 );
+ } else {
+ n_LTP_Q12 = 0;
+ }
+
+ n_Tilt_Q10 = SKP_SMULWB( sLF_AR_shp_Q12, Tilt_Q14 );
+ n_LF_Q10 = SKP_SMLAWB( SKP_SMULWT( sLF_AR_shp_Q12, LF_shp_Q14 ), sLF_MA_shp_Q12, LF_shp_Q14 );
+
+ sLF_AR_shp_Q12 = SKP_SUB32( st_res_Q12[ i ], SKP_LSHIFT( n_Tilt_Q10, 2 ) );
+ sLF_MA_shp_Q12 = SKP_SUB32( sLF_AR_shp_Q12, SKP_LSHIFT( n_LF_Q10, 2 ) );
+
+ LTP_shp_buf_idx = ( LTP_shp_buf_idx - 1 ) & LTP_MASK;
+ LTP_shp_buf[ LTP_shp_buf_idx ] = ( SKP_int16 )SKP_SAT16( SKP_RSHIFT_ROUND( sLF_MA_shp_Q12, 12 ) );
+
+ xw[i] = ( SKP_int16 )SKP_SAT16( SKP_RSHIFT_ROUND( SKP_SUB32( sLF_MA_shp_Q12, n_LTP_Q12 ), 12 ) );
+ }
+
+ /* Copy temp variable back to state */
+ P->sLF_AR_shp_Q12 = sLF_AR_shp_Q12;
+ P->sLF_MA_shp_Q12 = sLF_MA_shp_Q12;
+ P->sLTP_shp_buf_idx = LTP_shp_buf_idx;
+}
--- /dev/null
+++ b/src_FIX/SKP_Silk_process_gains_FIX.c
@@ -1,0 +1,108 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FIX.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+/* Processing of gains */
+void SKP_Silk_process_gains_FIX(
+ SKP_Silk_encoder_state_FIX *psEnc, /* I/O Encoder state_FIX */
+ SKP_Silk_encoder_control_FIX *psEncCtrl /* I/O Encoder control_FIX */
+)
+{
+ SKP_Silk_shape_state_FIX *psShapeSt = &psEnc->sShape;
+ SKP_int k;
+ SKP_int32 s_Q16, InvMaxSqrVal_Q16, gain, gain_squared, ResNrg, ResNrgPart, quant_offset_Q10;
+
+ /* Gain reduction when LTP coding gain is high */
+ if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
+ /*s = -0.5f * SKP_sigmoid( 0.25f * ( psEncCtrl->LTPredCodGain - 12.0f ) ); */
+ s_Q16 = -SKP_Silk_sigm_Q15( SKP_RSHIFT_ROUND( psEncCtrl->LTPredCodGain_Q7 - SKP_FIX_CONST( 12.0, 7 ), 4 ) );
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ psEncCtrl->Gains_Q16[ k ] = SKP_SMLAWB( psEncCtrl->Gains_Q16[ k ], psEncCtrl->Gains_Q16[ k ], s_Q16 );
+ }
+ }
+
+ /* Limit the quantized signal */
+ /* InvMaxSqrVal = pow( 2.0f, 0.33f * ( 21.0f - SNR_dB ) ) / subfr_length; */
+ InvMaxSqrVal_Q16 = SKP_DIV32_16( SKP_Silk_log2lin(
+ SKP_SMULWB( SKP_FIX_CONST( 21 + 16 / 0.33, 7 ) - psEnc->sCmn.SNR_dB_Q7, SKP_FIX_CONST( 0.33, 16 ) ) ), psEnc->sCmn.subfr_length );
+
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ /* Soft limit on ratio residual energy and squared gains */
+ ResNrg = psEncCtrl->ResNrg[ k ];
+ ResNrgPart = SKP_SMULWW( ResNrg, InvMaxSqrVal_Q16 );
+ if( psEncCtrl->ResNrgQ[ k ] > 0 ) {
+ ResNrgPart = SKP_RSHIFT_ROUND( ResNrgPart, psEncCtrl->ResNrgQ[ k ] );
+ } else {
+ if( ResNrgPart >= SKP_RSHIFT( SKP_int32_MAX, -psEncCtrl->ResNrgQ[ k ] ) ) {
+ ResNrgPart = SKP_int32_MAX;
+ } else {
+ ResNrgPart = SKP_LSHIFT( ResNrgPart, -psEncCtrl->ResNrgQ[ k ] );
+ }
+ }
+ gain = psEncCtrl->Gains_Q16[ k ];
+ gain_squared = SKP_ADD_SAT32( ResNrgPart, SKP_SMMUL( gain, gain ) );
+ if( gain_squared < SKP_int16_MAX ) {
+ /* recalculate with higher precision */
+ gain_squared = SKP_SMLAWW( SKP_LSHIFT( ResNrgPart, 16 ), gain, gain );
+ SKP_assert( gain_squared > 0 );
+ gain = SKP_Silk_SQRT_APPROX( gain_squared ); /* Q8 */
+ gain = SKP_min( gain, SKP_int32_MAX >> 8 );
+ psEncCtrl->Gains_Q16[ k ] = SKP_LSHIFT_SAT32( gain, 8 ); /* Q16 */
+ } else {
+ gain = SKP_Silk_SQRT_APPROX( gain_squared ); /* Q0 */
+ gain = SKP_min( gain, SKP_int32_MAX >> 16 );
+ psEncCtrl->Gains_Q16[ k ] = SKP_LSHIFT_SAT32( gain, 16 ); /* Q16 */
+ }
+ }
+
+ /* Noise shaping quantization */
+ SKP_Silk_gains_quant( psEnc->sCmn.indices.GainsIndices, psEncCtrl->Gains_Q16,
+ &psShapeSt->LastGainIndex, psEnc->sCmn.nFramesAnalyzed, psEnc->sCmn.nb_subfr );
+
+ /* Set quantizer offset for voiced signals. Larger offset when LTP coding gain is low or tilt is high (ie low-pass) */
+ if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
+ if( psEncCtrl->LTPredCodGain_Q7 + SKP_RSHIFT( psEnc->sCmn.input_tilt_Q15, 8 ) > SKP_FIX_CONST( 1.0, 7 ) ) {
+ psEnc->sCmn.indices.quantOffsetType = 0;
+ } else {
+ psEnc->sCmn.indices.quantOffsetType = 1;
+ }
+ }
+
+ /* Quantizer boundary adjustment */
+ quant_offset_Q10 = SKP_Silk_Quantization_Offsets_Q10[ psEnc->sCmn.indices.signalType >> 1 ][ psEnc->sCmn.indices.quantOffsetType ];
+ psEncCtrl->Lambda_Q10 = SKP_FIX_CONST( LAMBDA_OFFSET, 10 )
+ + SKP_SMULBB( SKP_FIX_CONST( LAMBDA_DELAYED_DECISIONS, 10 ), psEnc->sCmn.nStatesDelayedDecision )
+ + SKP_SMULWB( SKP_FIX_CONST( LAMBDA_SPEECH_ACT, 18 ), psEnc->sCmn.speech_activity_Q8 )
+ + SKP_SMULWB( SKP_FIX_CONST( LAMBDA_INPUT_QUALITY, 12 ), psEncCtrl->input_quality_Q14 )
+ + SKP_SMULWB( SKP_FIX_CONST( LAMBDA_CODING_QUALITY, 12 ), psEncCtrl->coding_quality_Q14 )
+ + SKP_SMULWB( SKP_FIX_CONST( LAMBDA_QUANT_OFFSET, 16 ), quant_offset_Q10 );
+
+ SKP_assert( psEncCtrl->Lambda_Q10 > 0 );
+ SKP_assert( psEncCtrl->Lambda_Q10 < SKP_FIX_CONST( 2, 10 ) );
+}
--- /dev/null
+++ b/src_FIX/SKP_Silk_regularize_correlations_FIX.c
@@ -1,0 +1,43 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FIX.h"
+
+/* Add noise to matrix diagonal */
+void SKP_Silk_regularize_correlations_FIX(
+ SKP_int32 *XX, /* I/O Correlation matrices */
+ SKP_int32 *xx, /* I/O Correlation values */
+ SKP_int32 noise, /* I Noise to add */
+ SKP_int D /* I Dimension of XX */
+)
+{
+ SKP_int i;
+ for( i = 0; i < D; i++ ) {
+ matrix_ptr( &XX[ 0 ], i, i, D ) = SKP_ADD32( matrix_ptr( &XX[ 0 ], i, i, D ), noise );
+ }
+ xx[ 0 ] += noise;
+}
--- /dev/null
+++ b/src_FIX/SKP_Silk_residual_energy16_FIX.c
@@ -1,0 +1,99 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FIX.h"
+
+/* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */
+SKP_int32 SKP_Silk_residual_energy16_covar_FIX(
+ const SKP_int16 *c, /* I Prediction vector */
+ const SKP_int32 *wXX, /* I Correlation matrix */
+ const SKP_int32 *wXx, /* I Correlation vector */
+ SKP_int32 wxx, /* I Signal energy */
+ SKP_int D, /* I Dimension */
+ SKP_int cQ /* I Q value for c vector 0 - 15 */
+)
+{
+ SKP_int i, j, lshifts, Qxtra;
+ SKP_int32 c_max, w_max, tmp, tmp2, nrg;
+ SKP_int cn[ MAX_MATRIX_SIZE ];
+ const SKP_int32 *pRow;
+
+ /* Safety checks */
+ SKP_assert( D >= 0 );
+ SKP_assert( D <= 16 );
+ SKP_assert( cQ > 0 );
+ SKP_assert( cQ < 16 );
+
+ lshifts = 16 - cQ;
+ Qxtra = lshifts;
+
+ c_max = 0;
+ for( i = 0; i < D; i++ ) {
+ c_max = SKP_max_32( c_max, SKP_abs( ( SKP_int32 )c[ i ] ) );
+ }
+ Qxtra = SKP_min_int( Qxtra, SKP_Silk_CLZ32( c_max ) - 17 );
+
+ w_max = SKP_max_32( wXX[ 0 ], wXX[ D * D - 1 ] );
+ Qxtra = SKP_min_int( Qxtra, SKP_Silk_CLZ32( SKP_MUL( D, SKP_RSHIFT( SKP_SMULWB( w_max, c_max ), 4 ) ) ) - 5 );
+ Qxtra = SKP_max_int( Qxtra, 0 );
+ for( i = 0; i < D; i++ ) {
+ cn[ i ] = SKP_LSHIFT( ( SKP_int )c[ i ], Qxtra );
+ SKP_assert( SKP_abs(cn[i]) <= ( SKP_int16_MAX + 1 ) ); /* Check that SKP_SMLAWB can be used */
+ }
+ lshifts -= Qxtra;
+
+ /* Compute wxx - 2 * wXx * c */
+ tmp = 0;
+ for( i = 0; i < D; i++ ) {
+ tmp = SKP_SMLAWB( tmp, wXx[ i ], cn[ i ] );
+ }
+ nrg = SKP_RSHIFT( wxx, 1 + lshifts ) - tmp; /* Q: -lshifts - 1 */
+
+ /* Add c' * wXX * c, assuming wXX is symmetric */
+ tmp2 = 0;
+ for( i = 0; i < D; i++ ) {
+ tmp = 0;
+ pRow = &wXX[ i * D ];
+ for( j = i + 1; j < D; j++ ) {
+ tmp = SKP_SMLAWB( tmp, pRow[ j ], cn[ j ] );
+ }
+ tmp = SKP_SMLAWB( tmp, SKP_RSHIFT( pRow[ i ], 1 ), cn[ i ] );
+ tmp2 = SKP_SMLAWB( tmp2, tmp, cn[ i ] );
+ }
+ nrg = SKP_ADD_LSHIFT32( nrg, tmp2, lshifts ); /* Q: -lshifts - 1 */
+
+ /* Keep one bit free always, because we add them for LSF interpolation */
+ if( nrg < 1 ) {
+ nrg = 1;
+ } else if( nrg > SKP_RSHIFT( SKP_int32_MAX, lshifts + 2 ) ) {
+ nrg = SKP_int32_MAX >> 1;
+ } else {
+ nrg = SKP_LSHIFT( nrg, lshifts + 1 ); /* Q0 */
+ }
+ return nrg;
+
+}
--- /dev/null
+++ b/src_FIX/SKP_Silk_residual_energy_FIX.c
@@ -1,0 +1,87 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FIX.h"
+
+/* Calculates residual energies of input subframes where all subframes have LPC_order */
+/* of preceeding samples */
+void SKP_Silk_residual_energy_FIX(
+ SKP_int32 nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */
+ SKP_int nrgsQ[ MAX_NB_SUBFR ], /* O Q value per subframe */
+ const SKP_int16 x[], /* I Input signal */
+ const SKP_int16 a_Q12[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */
+ const SKP_int32 gains[ MAX_NB_SUBFR ], /* I Quantization gains */
+ const SKP_int subfr_length, /* I Subframe length */
+ const SKP_int nb_subfr, /* I Number of subframes */
+ const SKP_int LPC_order /* I LPC order */
+)
+{
+ SKP_int offset, i, j, rshift, lz1, lz2;
+ SKP_int16 *LPC_res_ptr, LPC_res[ ( MAX_FRAME_LENGTH + MAX_NB_SUBFR * MAX_LPC_ORDER ) / 2 ];
+ const SKP_int16 *x_ptr;
+ SKP_int32 tmp32;
+
+ x_ptr = x;
+ offset = LPC_order + subfr_length;
+
+ /* Filter input to create the LPC residual for each frame half, and measure subframe energies */
+ for( i = 0; i < nb_subfr >> 1; i++ ) {
+ /* Calculate half frame LPC residual signal including preceeding samples */
+ SKP_Silk_LPC_analysis_filter( LPC_res, x_ptr, a_Q12[ i ], ( MAX_NB_SUBFR >> 1 ) * offset, LPC_order );
+
+ /* Point to first subframe of the just calculated LPC residual signal */
+ LPC_res_ptr = LPC_res + LPC_order;
+ for( j = 0; j < ( MAX_NB_SUBFR >> 1 ); j++ ) {
+ /* Measure subframe energy */
+ SKP_Silk_sum_sqr_shift( &nrgs[ i * ( MAX_NB_SUBFR >> 1 ) + j ], &rshift, LPC_res_ptr, subfr_length );
+
+ /* Set Q values for the measured energy */
+ nrgsQ[ i * ( MAX_NB_SUBFR >> 1 ) + j ] = -rshift;
+
+ /* Move to next subframe */
+ LPC_res_ptr += offset;
+ }
+ /* Move to next frame half */
+ x_ptr += ( MAX_NB_SUBFR >> 1 ) * offset;
+ }
+
+ /* Apply the squared subframe gains */
+ for( i = 0; i < nb_subfr; i++ ) {
+ /* Fully upscale gains and energies */
+ lz1 = SKP_Silk_CLZ32( nrgs[ i ] ) - 1;
+ lz2 = SKP_Silk_CLZ32( gains[ i ] ) - 1;
+
+ tmp32 = SKP_LSHIFT32( gains[ i ], lz2 );
+
+ /* Find squared gains */
+ tmp32 = SKP_SMMUL( tmp32, tmp32 ); // Q( 2 * lz2 - 32 )
+
+ /* Scale energies */
+ nrgs[ i ] = SKP_SMMUL( tmp32, SKP_LSHIFT32( nrgs[ i ], lz1 ) ); // Q( nrgsQ[ i ] + lz1 + 2 * lz2 - 32 - 32 )
+ nrgsQ[ i ] += lz1 + 2 * lz2 - 32 - 32;
+ }
+}
--- /dev/null
+++ b/src_FIX/SKP_Silk_solve_LS_FIX.c
@@ -1,0 +1,241 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FIX.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+/*****************************/
+/* Internal function headers */
+/*****************************/
+
+typedef struct {
+ SKP_int32 Q36_part;
+ SKP_int32 Q48_part;
+} inv_D_t;
+
+/* Factorize square matrix A into LDL form */
+SKP_INLINE void SKP_Silk_LDL_factorize_FIX(
+ SKP_int32 *A, /* I/O Pointer to Symetric Square Matrix */
+ SKP_int M, /* I Size of Matrix */
+ SKP_int32 *L_Q16, /* I/O Pointer to Square Upper triangular Matrix */
+ inv_D_t *inv_D /* I/O Pointer to vector holding inverted diagonal elements of D */
+);
+
+/* Solve Lx = b, when L is lower triangular and has ones on the diagonal */
+SKP_INLINE void SKP_Silk_LS_SolveFirst_FIX(
+ const SKP_int32 *L_Q16, /* I Pointer to Lower Triangular Matrix */
+ SKP_int M, /* I Dim of Matrix equation */
+ const SKP_int32 *b, /* I b Vector */
+ SKP_int32 *x_Q16 /* O x Vector */
+);
+
+/* Solve L^t*x = b, where L is lower triangular with ones on the diagonal */
+SKP_INLINE void SKP_Silk_LS_SolveLast_FIX(
+ const SKP_int32 *L_Q16, /* I Pointer to Lower Triangular Matrix */
+ const SKP_int M, /* I Dim of Matrix equation */
+ const SKP_int32 *b, /* I b Vector */
+ SKP_int32 *x_Q16 /* O x Vector */
+);
+
+SKP_INLINE void SKP_Silk_LS_divide_Q16_FIX(
+ SKP_int32 T[], /* I/O Numenator vector */
+ inv_D_t *inv_D, /* I 1 / D vector */
+ SKP_int M /* I dimension */
+);
+
+/* Solves Ax = b, assuming A is symmetric */
+void SKP_Silk_solve_LDL_FIX(
+ SKP_int32 *A, /* I Pointer to symetric square matrix A */
+ SKP_int M, /* I Size of matrix */
+ const SKP_int32 *b, /* I Pointer to b vector */
+ SKP_int32 *x_Q16 /* O Pointer to x solution vector */
+)
+{
+ SKP_int32 L_Q16[ MAX_MATRIX_SIZE * MAX_MATRIX_SIZE ];
+ SKP_int32 Y[ MAX_MATRIX_SIZE ];
+ inv_D_t inv_D[ MAX_MATRIX_SIZE ];
+
+ SKP_assert( M <= MAX_MATRIX_SIZE );
+
+ /***************************************************
+ Factorize A by LDL such that A = L*D*L',
+ where L is lower triangular with ones on diagonal
+ ****************************************************/
+ SKP_Silk_LDL_factorize_FIX( A, M, L_Q16, inv_D );
+
+ /****************************************************
+ * substitute D*L'*x = Y. ie:
+ L*D*L'*x = b => L*Y = b <=> Y = inv(L)*b
+ ******************************************************/
+ SKP_Silk_LS_SolveFirst_FIX( L_Q16, M, b, Y );
+
+ /****************************************************
+ D*L'*x = Y <=> L'*x = inv(D)*Y, because D is
+ diagonal just multiply with 1/d_i
+ ****************************************************/
+ SKP_Silk_LS_divide_Q16_FIX( Y, inv_D, M );
+
+ /****************************************************
+ x = inv(L') * inv(D) * Y
+ *****************************************************/
+ SKP_Silk_LS_SolveLast_FIX( L_Q16, M, Y, x_Q16 );
+}
+
+SKP_INLINE void SKP_Silk_LDL_factorize_FIX(
+ SKP_int32 *A, /* I Pointer to Symetric Square Matrix */
+ SKP_int M, /* I Size of Matrix */
+ SKP_int32 *L_Q16, /* I/O Pointer to Square Upper triangular Matrix */
+ inv_D_t *inv_D /* I/O Pointer to vector holding inverted diagonal elements of D */
+)
+{
+ SKP_int i, j, k, status, loop_count;
+ const SKP_int32 *ptr1, *ptr2;
+ SKP_int32 diag_min_value, tmp_32, err;
+ SKP_int32 v_Q0[ MAX_MATRIX_SIZE ], D_Q0[ MAX_MATRIX_SIZE ];
+ SKP_int32 one_div_diag_Q36, one_div_diag_Q40, one_div_diag_Q48;
+
+ SKP_assert( M <= MAX_MATRIX_SIZE );
+
+ status = 1;
+ diag_min_value = SKP_max_32( SKP_SMMUL( SKP_ADD_SAT32( A[ 0 ], A[ SKP_SMULBB( M, M ) - 1 ] ), SKP_FIX_CONST( FIND_LTP_COND_FAC, 31 ) ), 1 << 9 );
+ for( loop_count = 0; loop_count < M && status == 1; loop_count++ ) {
+ status = 0;
+ for( j = 0; j < M; j++ ) {
+ ptr1 = matrix_adr( L_Q16, j, 0, M );
+ tmp_32 = 0;
+ for( i = 0; i < j; i++ ) {
+ v_Q0[ i ] = SKP_SMULWW( D_Q0[ i ], ptr1[ i ] ); /* Q0 */
+ tmp_32 = SKP_SMLAWW( tmp_32, v_Q0[ i ], ptr1[ i ] ); /* Q0 */
+ }
+ tmp_32 = SKP_SUB32( matrix_ptr( A, j, j, M ), tmp_32 );
+
+ if( tmp_32 < diag_min_value ) {
+ tmp_32 = SKP_SUB32( SKP_SMULBB( loop_count + 1, diag_min_value ), tmp_32 );
+ /* Matrix not positive semi-definite, or ill conditioned */
+ for( i = 0; i < M; i++ ) {
+ matrix_ptr( A, i, i, M ) = SKP_ADD32( matrix_ptr( A, i, i, M ), tmp_32 );
+ }
+ status = 1;
+ break;
+ }
+ D_Q0[ j ] = tmp_32; /* always < max(Correlation) */
+
+ /* two-step division */
+ one_div_diag_Q36 = SKP_INVERSE32_varQ( tmp_32, 36 ); /* Q36 */
+ one_div_diag_Q40 = SKP_LSHIFT( one_div_diag_Q36, 4 ); /* Q40 */
+ err = SKP_SUB32( 1 << 24, SKP_SMULWW( tmp_32, one_div_diag_Q40 ) ); /* Q24 */
+ one_div_diag_Q48 = SKP_SMULWW( err, one_div_diag_Q40 ); /* Q48 */
+
+ /* Save 1/Ds */
+ inv_D[ j ].Q36_part = one_div_diag_Q36;
+ inv_D[ j ].Q48_part = one_div_diag_Q48;
+
+ matrix_ptr( L_Q16, j, j, M ) = 65536; /* 1.0 in Q16 */
+ ptr1 = matrix_adr( A, j, 0, M );
+ ptr2 = matrix_adr( L_Q16, j + 1, 0, M );
+ for( i = j + 1; i < M; i++ ) {
+ tmp_32 = 0;
+ for( k = 0; k < j; k++ ) {
+ tmp_32 = SKP_SMLAWW( tmp_32, v_Q0[ k ], ptr2[ k ] ); /* Q0 */
+ }
+ tmp_32 = SKP_SUB32( ptr1[ i ], tmp_32 ); /* always < max(Correlation) */
+
+ /* tmp_32 / D_Q0[j] : Divide to Q16 */
+ matrix_ptr( L_Q16, i, j, M ) = SKP_ADD32( SKP_SMMUL( tmp_32, one_div_diag_Q48 ),
+ SKP_RSHIFT( SKP_SMULWW( tmp_32, one_div_diag_Q36 ), 4 ) );
+
+ /* go to next column */
+ ptr2 += M;
+ }
+ }
+ }
+
+ SKP_assert( status == 0 );
+}
+
+SKP_INLINE void SKP_Silk_LS_divide_Q16_FIX(
+ SKP_int32 T[], /* I/O Numenator vector */
+ inv_D_t *inv_D, /* I 1 / D vector */
+ SKP_int M /* I Order */
+)
+{
+ SKP_int i;
+ SKP_int32 tmp_32;
+ SKP_int32 one_div_diag_Q36, one_div_diag_Q48;
+
+ for( i = 0; i < M; i++ ) {
+ one_div_diag_Q36 = inv_D[ i ].Q36_part;
+ one_div_diag_Q48 = inv_D[ i ].Q48_part;
+
+ tmp_32 = T[ i ];
+ T[ i ] = SKP_ADD32( SKP_SMMUL( tmp_32, one_div_diag_Q48 ), SKP_RSHIFT( SKP_SMULWW( tmp_32, one_div_diag_Q36 ), 4 ) );
+ }
+}
+
+/* Solve Lx = b, when L is lower triangular and has ones on the diagonal */
+SKP_INLINE void SKP_Silk_LS_SolveFirst_FIX(
+ const SKP_int32 *L_Q16, /* I Pointer to Lower Triangular Matrix */
+ SKP_int M, /* I Dim of Matrix equation */
+ const SKP_int32 *b, /* I b Vector */
+ SKP_int32 *x_Q16 /* O x Vector */
+)
+{
+ SKP_int i, j;
+ const SKP_int32 *ptr32;
+ SKP_int32 tmp_32;
+
+ for( i = 0; i < M; i++ ) {
+ ptr32 = matrix_adr( L_Q16, i, 0, M );
+ tmp_32 = 0;
+ for( j = 0; j < i; j++ ) {
+ tmp_32 = SKP_SMLAWW( tmp_32, ptr32[ j ], x_Q16[ j ] );
+ }
+ x_Q16[ i ] = SKP_SUB32( b[ i ], tmp_32 );
+ }
+}
+
+/* Solve L^t*x = b, where L is lower triangular with ones on the diagonal */
+SKP_INLINE void SKP_Silk_LS_SolveLast_FIX(
+ const SKP_int32 *L_Q16, /* I Pointer to Lower Triangular Matrix */
+ const SKP_int M, /* I Dim of Matrix equation */
+ const SKP_int32 *b, /* I b Vector */
+ SKP_int32 *x_Q16 /* O x Vector */
+)
+{
+ SKP_int i, j;
+ const SKP_int32 *ptr32;
+ SKP_int32 tmp_32;
+
+ for( i = M - 1; i >= 0; i-- ) {
+ ptr32 = matrix_adr( L_Q16, 0, i, M );
+ tmp_32 = 0;
+ for( j = M - 1; j > i; j-- ) {
+ tmp_32 = SKP_SMLAWW( tmp_32, ptr32[ SKP_SMULBB( j, M ) ], x_Q16[ j ] );
+ }
+ x_Q16[ i ] = SKP_SUB32( b[ i ], tmp_32 );
+ }
+}
--- /dev/null
+++ b/src_FIX/SKP_Silk_structs_FIX.h
@@ -1,0 +1,119 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef SKP_SILK_STRUCTS_FIX_H
+#define SKP_SILK_STRUCTS_FIX_H
+
+#include "SKP_Silk_typedef.h"
+#include "SKP_Silk_main.h"
+#include "SKP_Silk_structs.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/********************************/
+/* Noise shaping analysis state */
+/********************************/
+typedef struct {
+ SKP_int8 LastGainIndex;
+ SKP_int32 HarmBoost_smth_Q16;
+ SKP_int32 HarmShapeGain_smth_Q16;
+ SKP_int32 Tilt_smth_Q16;
+} SKP_Silk_shape_state_FIX;
+
+/********************************/
+/* Prefilter state */
+/********************************/
+typedef struct {
+ SKP_int16 sLTP_shp[ LTP_BUF_LENGTH ];
+ SKP_int32 sAR_shp[ MAX_SHAPE_LPC_ORDER + 1 ];
+ SKP_int sLTP_shp_buf_idx;
+ SKP_int32 sLF_AR_shp_Q12;
+ SKP_int32 sLF_MA_shp_Q12;
+ SKP_int sHarmHP;
+ SKP_int32 rand_seed;
+ SKP_int lagPrev;
+} SKP_Silk_prefilter_state_FIX;
+
+/********************************/
+/* Encoder state FIX */
+/********************************/
+typedef struct {
+ SKP_Silk_encoder_state sCmn; /* Common struct, shared with floating-point code */
+ SKP_Silk_shape_state_FIX sShape; /* Shape state */
+ SKP_Silk_prefilter_state_FIX sPrefilt; /* Prefilter State */
+
+ /* Buffer for find pitch and noise shape analysis */
+ SKP_DWORD_ALIGN SKP_int16 x_buf[ 2 * MAX_FRAME_LENGTH + LA_SHAPE_MAX ];
+ SKP_int LTPCorr_Q15; /* Normalized correlation from pitch lag estimator */
+
+ /* Parameters For LTP scaling Control */
+ SKP_int prevLTPredCodGain_Q7;
+ SKP_int HPLTPredCodGain_Q7;
+} SKP_Silk_encoder_state_FIX;
+
+/************************/
+/* Encoder control FIX */
+/************************/
+typedef struct {
+ /* Prediction and coding parameters */
+ SKP_int32 Gains_Q16[ MAX_NB_SUBFR ];
+ SKP_DWORD_ALIGN SKP_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ];
+ SKP_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ];
+ SKP_int LTP_scale_Q14;
+ SKP_int pitchL[ MAX_NB_SUBFR ];
+
+ /* Noise shaping parameters */
+ /* Testing */
+ SKP_DWORD_ALIGN SKP_int16 AR1_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ];
+ SKP_DWORD_ALIGN SKP_int16 AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ];
+ SKP_int32 LF_shp_Q14[ MAX_NB_SUBFR ]; /* Packs two int16 coefficients per int32 value */
+ SKP_int GainsPre_Q14[ MAX_NB_SUBFR ];
+ SKP_int HarmBoost_Q14[ MAX_NB_SUBFR ];
+ SKP_int Tilt_Q14[ MAX_NB_SUBFR ];
+ SKP_int HarmShapeGain_Q14[ MAX_NB_SUBFR ];
+ SKP_int Lambda_Q10;
+ SKP_int input_quality_Q14;
+ SKP_int coding_quality_Q14;
+
+ /* measures */
+ SKP_int sparseness_Q8;
+ SKP_int32 predGain_Q16;
+ SKP_int LTPredCodGain_Q7;
+ SKP_int32 ResNrg[ MAX_NB_SUBFR ]; /* Residual energy per subframe */
+ SKP_int ResNrgQ[ MAX_NB_SUBFR ]; /* Q domain for the residual energy > 0 */
+
+} SKP_Silk_encoder_control_FIX;
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+++ b/src_FIX/SKP_Silk_warped_autocorrelation_FIX.c
@@ -1,0 +1,84 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FIX.h"
+
+#define QC 10
+#define QS 14
+
+/* Autocorrelations for a warped frequency axis */
+void SKP_Silk_warped_autocorrelation_FIX(
+ SKP_int32 *corr, /* O Result [order + 1] */
+ SKP_int *scale, /* O Scaling of the correlation vector */
+ const SKP_int16 *input, /* I Input data to correlate */
+ const SKP_int warping_Q16, /* I Warping coefficient */
+ const SKP_int length, /* I Length of input */
+ const SKP_int order /* I Correlation order (even) */
+)
+{
+ SKP_int n, i, lsh;
+ SKP_int32 tmp1_QS, tmp2_QS;
+ SKP_int32 state_QS[ MAX_SHAPE_LPC_ORDER + 1 ] = { 0 };
+ SKP_int64 corr_QC[ MAX_SHAPE_LPC_ORDER + 1 ] = { 0 };
+
+ /* Order must be even */
+ SKP_assert( ( order & 1 ) == 0 );
+ SKP_assert( 2 * QS - QC >= 0 );
+
+ /* Loop over samples */
+ for( n = 0; n < length; n++ ) {
+ tmp1_QS = SKP_LSHIFT32( ( SKP_int32 )input[ n ], QS );
+ /* Loop over allpass sections */
+ for( i = 0; i < order; i += 2 ) {
+ /* Output of allpass section */
+ tmp2_QS = SKP_SMLAWB( state_QS[ i ], state_QS[ i + 1 ] - tmp1_QS, warping_Q16 );
+ state_QS[ i ] = tmp1_QS;
+ corr_QC[ i ] += SKP_RSHIFT64( SKP_SMULL( tmp1_QS, state_QS[ 0 ] ), 2 * QS - QC );
+ /* Output of allpass section */
+ tmp1_QS = SKP_SMLAWB( state_QS[ i + 1 ], state_QS[ i + 2 ] - tmp2_QS, warping_Q16 );
+ state_QS[ i + 1 ] = tmp2_QS;
+ corr_QC[ i + 1 ] += SKP_RSHIFT64( SKP_SMULL( tmp2_QS, state_QS[ 0 ] ), 2 * QS - QC );
+ }
+ state_QS[ order ] = tmp1_QS;
+ corr_QC[ order ] += SKP_RSHIFT64( SKP_SMULL( tmp1_QS, state_QS[ 0 ] ), 2 * QS - QC );
+ }
+
+ lsh = SKP_Silk_CLZ64( corr_QC[ 0 ] ) - 35;
+ lsh = SKP_LIMIT( lsh, -12 - QC, 30 - QC );
+ *scale = -( QC + lsh );
+ SKP_assert( *scale >= -30 && *scale <= 12 );
+ if( lsh >= 0 ) {
+ for( i = 0; i < order + 1; i++ ) {
+ corr[ i ] = ( SKP_int32 )SKP_CHECK_FIT32( SKP_LSHIFT64( corr_QC[ i ], lsh ) );
+ }
+ } else {
+ for( i = 0; i < order + 1; i++ ) {
+ corr[ i ] = ( SKP_int32 )SKP_CHECK_FIT32( SKP_RSHIFT64( corr_QC[ i ], -lsh ) );
+ }
+ }
+ SKP_assert( corr_QC[ 0 ] >= 0 ); // If breaking, decrease QC
+}
--- /dev/null
+++ b/src_FIX/src_FIX.vcxproj
@@ -1,0 +1,101 @@
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+ <AdditionalIncludeDirectories>../interface;../src_SigProc_FIX;../src_common;../../celt/msvc;../../celt/libcelt</AdditionalIncludeDirectories>
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+ <Link>
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+ <None Include="ReadMe.txt" />
+ </ItemGroup>
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+ <ClInclude Include="SKP_Silk_main_FIX.h" />
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+ </ItemGroup>
+ <ItemGroup>
+ <ClCompile Include="SKP_Silk_corrMatrix_FIX.c" />
+ <ClCompile Include="SKP_Silk_encode_frame_FIX.c" />
+ <ClCompile Include="SKP_Silk_find_LPC_FIX.c" />
+ <ClCompile Include="SKP_Silk_find_LTP_FIX.c" />
+ <ClCompile Include="SKP_Silk_find_pitch_lags_FIX.c" />
+ <ClCompile Include="SKP_Silk_find_pred_coefs_FIX.c" />
+ <ClCompile Include="SKP_Silk_LTP_analysis_filter_FIX.c" />
+ <ClCompile Include="SKP_Silk_LTP_scale_ctrl_FIX.c" />
+ <ClCompile Include="SKP_Silk_noise_shape_analysis_FIX.c" />
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+ </ItemGroup>
+ <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+ <ImportGroup Label="ExtensionTargets">
+ </ImportGroup>
+</Project>
\ No newline at end of file
--- /dev/null
+++ b/src_FIX/src_FIX.vcxproj.filters
@@ -1,0 +1,78 @@
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+ </ItemGroup>
+ <ItemGroup>
+ <ClInclude Include="SKP_Silk_main_FIX.h">
+ <Filter>Header Files</Filter>
+ </ClInclude>
+ <ClInclude Include="SKP_Silk_structs_FIX.h">
+ <Filter>Header Files</Filter>
+ </ClInclude>
+ </ItemGroup>
+ <ItemGroup>
+ <ClCompile Include="SKP_Silk_corrMatrix_FIX.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ <ClCompile Include="SKP_Silk_encode_frame_FIX.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ <ClCompile Include="SKP_Silk_find_LPC_FIX.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ <ClCompile Include="SKP_Silk_find_LTP_FIX.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ <ClCompile Include="SKP_Silk_find_pitch_lags_FIX.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ <ClCompile Include="SKP_Silk_find_pred_coefs_FIX.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ <ClCompile Include="SKP_Silk_LTP_analysis_filter_FIX.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ <ClCompile Include="SKP_Silk_LTP_scale_ctrl_FIX.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ <ClCompile Include="SKP_Silk_noise_shape_analysis_FIX.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ <ClCompile Include="SKP_Silk_prefilter_FIX.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ <ClCompile Include="SKP_Silk_process_gains_FIX.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ <ClCompile Include="SKP_Silk_regularize_correlations_FIX.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ <ClCompile Include="SKP_Silk_residual_energy_FIX.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ <ClCompile Include="SKP_Silk_residual_energy16_FIX.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ <ClCompile Include="SKP_Silk_solve_LS_FIX.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ <ClCompile Include="SKP_Silk_warped_autocorrelation_FIX.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ </ItemGroup>
+</Project>
\ No newline at end of file
--- /dev/null
+++ b/src_FLP/SKP_Silk_LPC_analysis_filter_FLP.c
@@ -1,0 +1,279 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include <stdlib.h>
+#include "SKP_Silk_main_FLP.h"
+
+/*******************************************/
+/* LPC analysis filter */
+/* NB! State is kept internally and the */
+/* filter always starts with zero state */
+/* first Order output samples are not set */
+/*******************************************/
+
+/* 16th order LPC analysis filter, does not write first 16 samples */
+void SKP_Silk_LPC_analysis_filter16_FLP(
+ SKP_float r_LPC[], /* O LPC residual signal */
+ const SKP_float PredCoef[], /* I LPC coefficients */
+ const SKP_float s[], /* I Input signal */
+ const SKP_int length /* I Length of input signal */
+)
+{
+ SKP_int ix;
+ SKP_float LPC_pred;
+ const SKP_float *s_ptr;
+
+ for ( ix = 16; ix < length; ix++) {
+ s_ptr = &s[ix - 1];
+
+ /* short-term prediction */
+ LPC_pred = s_ptr[ 0 ] * PredCoef[ 0 ] +
+ s_ptr[ -1 ] * PredCoef[ 1 ] +
+ s_ptr[ -2 ] * PredCoef[ 2 ] +
+ s_ptr[ -3 ] * PredCoef[ 3 ] +
+ s_ptr[ -4 ] * PredCoef[ 4 ] +
+ s_ptr[ -5 ] * PredCoef[ 5 ] +
+ s_ptr[ -6 ] * PredCoef[ 6 ] +
+ s_ptr[ -7 ] * PredCoef[ 7 ] +
+ s_ptr[ -8 ] * PredCoef[ 8 ] +
+ s_ptr[ -9 ] * PredCoef[ 9 ] +
+ s_ptr[ -10 ] * PredCoef[ 10 ] +
+ s_ptr[ -11 ] * PredCoef[ 11 ] +
+ s_ptr[ -12 ] * PredCoef[ 12 ] +
+ s_ptr[ -13 ] * PredCoef[ 13 ] +
+ s_ptr[ -14 ] * PredCoef[ 14 ] +
+ s_ptr[ -15 ] * PredCoef[ 15 ];
+
+ /* prediction error */
+ r_LPC[ix] = s_ptr[ 1 ] - LPC_pred;
+ }
+}
+
+/* 14th order LPC analysis filter, does not write first 14 samples */
+void SKP_Silk_LPC_analysis_filter14_FLP(
+ SKP_float r_LPC[], /* O LPC residual signal */
+ const SKP_float PredCoef[], /* I LPC coefficients */
+ const SKP_float s[], /* I Input signal */
+ const SKP_int length /* I Length of input signal */
+)
+{
+ SKP_int ix;
+ SKP_float LPC_pred;
+ const SKP_float *s_ptr;
+
+ for ( ix = 14; ix < length; ix++) {
+ s_ptr = &s[ix - 1];
+
+ /* short-term prediction */
+ LPC_pred = s_ptr[ 0 ] * PredCoef[ 0 ] +
+ s_ptr[ -1 ] * PredCoef[ 1 ] +
+ s_ptr[ -2 ] * PredCoef[ 2 ] +
+ s_ptr[ -3 ] * PredCoef[ 3 ] +
+ s_ptr[ -4 ] * PredCoef[ 4 ] +
+ s_ptr[ -5 ] * PredCoef[ 5 ] +
+ s_ptr[ -6 ] * PredCoef[ 6 ] +
+ s_ptr[ -7 ] * PredCoef[ 7 ] +
+ s_ptr[ -8 ] * PredCoef[ 8 ] +
+ s_ptr[ -9 ] * PredCoef[ 9 ] +
+ s_ptr[ -10 ] * PredCoef[ 10 ] +
+ s_ptr[ -11 ] * PredCoef[ 11 ] +
+ s_ptr[ -12 ] * PredCoef[ 12 ] +
+ s_ptr[ -13 ] * PredCoef[ 13 ];
+
+ /* prediction error */
+ r_LPC[ix] = s_ptr[ 1 ] - LPC_pred;
+ }
+}
+
+/* 12th order LPC analysis filter, does not write first 12 samples */
+void SKP_Silk_LPC_analysis_filter12_FLP(
+ SKP_float r_LPC[], /* O LPC residual signal */
+ const SKP_float PredCoef[], /* I LPC coefficients */
+ const SKP_float s[], /* I Input signal */
+ const SKP_int length /* I Length of input signal */
+)
+{
+ SKP_int ix;
+ SKP_float LPC_pred;
+ const SKP_float *s_ptr;
+
+ for ( ix = 12; ix < length; ix++) {
+ s_ptr = &s[ix - 1];
+
+ /* short-term prediction */
+ LPC_pred = s_ptr[ 0 ] * PredCoef[ 0 ] +
+ s_ptr[ -1 ] * PredCoef[ 1 ] +
+ s_ptr[ -2 ] * PredCoef[ 2 ] +
+ s_ptr[ -3 ] * PredCoef[ 3 ] +
+ s_ptr[ -4 ] * PredCoef[ 4 ] +
+ s_ptr[ -5 ] * PredCoef[ 5 ] +
+ s_ptr[ -6 ] * PredCoef[ 6 ] +
+ s_ptr[ -7 ] * PredCoef[ 7 ] +
+ s_ptr[ -8 ] * PredCoef[ 8 ] +
+ s_ptr[ -9 ] * PredCoef[ 9 ] +
+ s_ptr[ -10 ] * PredCoef[ 10 ] +
+ s_ptr[ -11 ] * PredCoef[ 11 ];
+
+ /* prediction error */
+ r_LPC[ix] = s_ptr[ 1 ] - LPC_pred;
+ }
+}
+
+/* 10th order LPC analysis filter, does not write first 10 samples */
+void SKP_Silk_LPC_analysis_filter10_FLP(
+ SKP_float r_LPC[], /* O LPC residual signal */
+ const SKP_float PredCoef[], /* I LPC coefficients */
+ const SKP_float s[], /* I Input signal */
+ const SKP_int length /* I Length of input signal */
+)
+{
+ SKP_int ix;
+ SKP_float LPC_pred;
+ const SKP_float *s_ptr;
+
+ for ( ix = 10; ix < length; ix++) {
+ s_ptr = &s[ix - 1];
+
+ /* short-term prediction */
+ LPC_pred = s_ptr[ 0 ] * PredCoef[ 0 ] +
+ s_ptr[ -1 ] * PredCoef[ 1 ] +
+ s_ptr[ -2 ] * PredCoef[ 2 ] +
+ s_ptr[ -3 ] * PredCoef[ 3 ] +
+ s_ptr[ -4 ] * PredCoef[ 4 ] +
+ s_ptr[ -5 ] * PredCoef[ 5 ] +
+ s_ptr[ -6 ] * PredCoef[ 6 ] +
+ s_ptr[ -7 ] * PredCoef[ 7 ] +
+ s_ptr[ -8 ] * PredCoef[ 8 ] +
+ s_ptr[ -9 ] * PredCoef[ 9 ];
+
+ /* prediction error */
+ r_LPC[ix] = s_ptr[ 1 ] - LPC_pred;
+ }
+}
+
+/* 8th order LPC analysis filter, does not write first 8 samples */
+void SKP_Silk_LPC_analysis_filter8_FLP(
+ SKP_float r_LPC[], /* O LPC residual signal */
+ const SKP_float PredCoef[], /* I LPC coefficients */
+ const SKP_float s[], /* I Input signal */
+ const SKP_int length /* I Length of input signal */
+)
+{
+ SKP_int ix;
+ SKP_float LPC_pred;
+ const SKP_float *s_ptr;
+
+ for ( ix = 8; ix < length; ix++) {
+ s_ptr = &s[ix - 1];
+
+ /* short-term prediction */
+ LPC_pred = s_ptr[ 0 ] * PredCoef[ 0 ] +
+ s_ptr[ -1 ] * PredCoef[ 1 ] +
+ s_ptr[ -2 ] * PredCoef[ 2 ] +
+ s_ptr[ -3 ] * PredCoef[ 3 ] +
+ s_ptr[ -4 ] * PredCoef[ 4 ] +
+ s_ptr[ -5 ] * PredCoef[ 5 ] +
+ s_ptr[ -6 ] * PredCoef[ 6 ] +
+ s_ptr[ -7 ] * PredCoef[ 7 ];
+
+ /* prediction error */
+ r_LPC[ix] = s_ptr[ 1 ] - LPC_pred;
+ }
+}
+
+/* 6th order LPC analysis filter, does not write first 6 samples */
+void SKP_Silk_LPC_analysis_filter6_FLP(
+ SKP_float r_LPC[], /* O LPC residual signal */
+ const SKP_float PredCoef[], /* I LPC coefficients */
+ const SKP_float s[], /* I Input signal */
+ const SKP_int length /* I Length of input signal */
+)
+{
+ SKP_int ix;
+ SKP_float LPC_pred;
+ const SKP_float *s_ptr;
+
+ for ( ix = 6; ix < length; ix++) {
+ s_ptr = &s[ix - 1];
+
+ /* short-term prediction */
+ LPC_pred = s_ptr[ 0 ] * PredCoef[ 0 ] +
+ s_ptr[ -1 ] * PredCoef[ 1 ] +
+ s_ptr[ -2 ] * PredCoef[ 2 ] +
+ s_ptr[ -3 ] * PredCoef[ 3 ] +
+ s_ptr[ -4 ] * PredCoef[ 4 ] +
+ s_ptr[ -5 ] * PredCoef[ 5 ];
+
+ /* prediction error */
+ r_LPC[ix] = s_ptr[ 1 ] - LPC_pred;
+ }
+}
+
+void SKP_Silk_LPC_analysis_filter_FLP(
+ SKP_float r_LPC[], /* O LPC residual signal */
+ const SKP_float PredCoef[], /* I LPC coefficients */
+ const SKP_float s[], /* I Input signal */
+ const SKP_int length, /* I Length of input signal */
+ const SKP_int Order /* I LPC order */
+)
+{
+ SKP_assert( Order <= length );
+
+ switch( Order ) {
+ case 6:
+ SKP_Silk_LPC_analysis_filter6_FLP( r_LPC, PredCoef, s, length );
+ break;
+
+ case 8:
+ SKP_Silk_LPC_analysis_filter8_FLP( r_LPC, PredCoef, s, length );
+ break;
+
+ case 10:
+ SKP_Silk_LPC_analysis_filter10_FLP( r_LPC, PredCoef, s, length );
+ break;
+
+ case 12:
+ SKP_Silk_LPC_analysis_filter12_FLP( r_LPC, PredCoef, s, length );
+ break;
+
+ case 14:
+ SKP_Silk_LPC_analysis_filter14_FLP( r_LPC, PredCoef, s, length );
+ break;
+
+ case 16:
+ SKP_Silk_LPC_analysis_filter16_FLP( r_LPC, PredCoef, s, length );
+ break;
+
+ default:
+ SKP_assert( 0 );
+ break;
+ }
+
+ /* Set first LPC Order samples to zero instead of undefined */
+ SKP_memset( r_LPC, 0, Order * sizeof( SKP_float ) );
+}
+
--- /dev/null
+++ b/src_FLP/SKP_Silk_LTP_analysis_filter_FLP.c
@@ -1,0 +1,71 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FLP.h"
+
+void SKP_Silk_LTP_analysis_filter_FLP(
+ SKP_float *LTP_res, /* O LTP res MAX_NB_SUBFR*(pre_lgth+subfr_lngth) */
+ const SKP_float *x, /* I Input signal, with preceeding samples */
+ const SKP_float B[ LTP_ORDER * MAX_NB_SUBFR ], /* I LTP coefficients for each subframe */
+ const SKP_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */
+ const SKP_float invGains[ MAX_NB_SUBFR ], /* I Inverse quantization gains */
+ const SKP_int subfr_length, /* I Length of each subframe */
+ const SKP_int nb_subfr, /* I number of subframes */
+ const SKP_int pre_length /* I Preceeding samples for each subframe */
+)
+{
+ const SKP_float *x_ptr, *x_lag_ptr;
+ SKP_float Btmp[ LTP_ORDER ];
+ SKP_float *LTP_res_ptr;
+ SKP_float inv_gain;
+ SKP_int k, i, j;
+
+ x_ptr = x;
+ LTP_res_ptr = LTP_res;
+ for( k = 0; k < nb_subfr; k++ ) {
+ x_lag_ptr = x_ptr - pitchL[ k ];
+ inv_gain = invGains[ k ];
+ for( i = 0; i < LTP_ORDER; i++ ) {
+ Btmp[ i ] = B[ k * LTP_ORDER + i ];
+ }
+
+ /* LTP analysis FIR filter */
+ for( i = 0; i < subfr_length + pre_length; i++ ) {
+ LTP_res_ptr[ i ] = x_ptr[ i ];
+ /* Subtract long-term prediction */
+ for( j = 0; j < LTP_ORDER; j++ ) {
+ LTP_res_ptr[ i ] -= Btmp[ j ] * x_lag_ptr[ LTP_ORDER / 2 - j ];
+ }
+ LTP_res_ptr[ i ] *= inv_gain;
+ x_lag_ptr++;
+ }
+
+ /* Update pointers */
+ LTP_res_ptr += subfr_length + pre_length;
+ x_ptr += subfr_length;
+ }
+}
--- /dev/null
+++ b/src_FLP/SKP_Silk_LTP_scale_ctrl_FLP.c
@@ -1,0 +1,52 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FLP.h"
+
+void SKP_Silk_LTP_scale_ctrl_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ SKP_Silk_encoder_control_FLP *psEncCtrl /* I/O Encoder control FLP */
+)
+{
+ SKP_int round_loss;
+
+ /* 1st order high-pass filter */
+ //g_HP(n) = g(n) - 0.5 * g(n-1) + 0.5 * g_HP(n-1);
+ psEnc->HPLTPredCodGain = SKP_max_float( psEncCtrl->LTPredCodGain - 0.5 * psEnc->prevLTPredCodGain, 0.0f )
+ + 0.5f * psEnc->HPLTPredCodGain;
+ psEnc->prevLTPredCodGain = psEncCtrl->LTPredCodGain;
+
+ /* Only scale if first frame in packet */
+ if( psEnc->sCmn.nFramesAnalyzed == 0 ) {
+ round_loss = psEnc->sCmn.PacketLoss_perc + psEnc->sCmn.nFramesPerPacket;
+ psEnc->sCmn.indices.LTP_scaleIndex = (SKP_int8)SKP_LIMIT( round_loss * psEnc->HPLTPredCodGain * 0.1f, 0.0f, 2.0f );
+ } else {
+ /* Default is minimum scaling */
+ psEnc->sCmn.indices.LTP_scaleIndex = 0;
+ }
+ psEncCtrl->LTP_scale = (SKP_float)SKP_Silk_LTPScales_table_Q14[ psEnc->sCmn.indices.LTP_scaleIndex ] / 16384.0f;
+}
--- /dev/null
+++ b/src_FLP/SKP_Silk_apply_sine_window_FLP.c
@@ -1,0 +1,77 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FLP.h"
+
+/* Apply sine window to signal vector. */
+/* Window types: */
+/* 1 -> sine window from 0 to pi/2 */
+/* 2 -> sine window from pi/2 to pi */
+void SKP_Silk_apply_sine_window_FLP(
+ SKP_float px_win[], /* O Pointer to windowed signal */
+ const SKP_float px[], /* I Pointer to input signal */
+ const SKP_int win_type, /* I Selects a window type */
+ const SKP_int length /* I Window length, multiple of 4 */
+)
+{
+ SKP_int k;
+ SKP_float freq, c, S0, S1;
+
+ SKP_assert( win_type == 1 || win_type == 2 );
+
+ /* Length must be multiple of 4 */
+ SKP_assert( ( length & 3 ) == 0 );
+
+ freq = PI / ( length + 1 );
+
+ /* Approximation of 2 * cos(f) */
+ c = 2.0f - freq * freq;
+
+ /* Initialize state */
+ if( win_type < 2 ) {
+ /* Start from 0 */
+ S0 = 0.0f;
+ /* Approximation of sin(f) */
+ S1 = freq;
+ } else {
+ /* Start from 1 */
+ S0 = 1.0f;
+ /* Approximation of cos(f) */
+ S1 = 0.5f * c;
+ }
+
+ /* Uses the recursive equation: sin(n*f) = 2 * cos(f) * sin((n-1)*f) - sin((n-2)*f) */
+ /* 4 samples at a time */
+ for( k = 0; k < length; k += 4 ) {
+ px_win[ k + 0 ] = px[ k + 0 ] * 0.5f * ( S0 + S1 );
+ px_win[ k + 1 ] = px[ k + 1 ] * S1;
+ S0 = c * S1 - S0;
+ px_win[ k + 2 ] = px[ k + 2 ] * 0.5f * ( S1 + S0 );
+ px_win[ k + 3 ] = px[ k + 3 ] * S0;
+ S1 = c * S0 - S1;
+ }
+}
--- /dev/null
+++ b/src_FLP/SKP_Silk_assembler_FLP.h
@@ -1,0 +1,42 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef SKP_SILK_ASSEMBLER_FLP_H
+#define SKP_SILK_ASSEMBLER_FLP_H
+
+#include "SKP_Silk_typedef.h"
+
+/* Declaration of assembler functions */
+
+void SKP_Silk_LPC_ana_sse(
+ float *r_LPC, /* O LPC residual signal */
+ const float *coefs, /* I LPC coefficients */
+ const float *speech, /* I Input signal */
+ int len /* I Length of input signal */
+);
+
+#endif
--- /dev/null
+++ b/src_FLP/SKP_Silk_corrMatrix_FLP.c
@@ -1,0 +1,89 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/**********************************************************************
+ * Correlation matrix computations for LS estimate.
+ **********************************************************************/
+
+#include "SKP_Silk_main_FLP.h"
+
+/* Calculates correlation vector X'*t */
+void SKP_Silk_corrVector_FLP(
+ const SKP_float *x, /* I x vector [L+order-1] used to create X */
+ const SKP_float *t, /* I Target vector [L] */
+ const SKP_int L, /* I Length of vecors */
+ const SKP_int Order, /* I Max lag for correlation */
+ SKP_float *Xt /* O X'*t correlation vector [order] */
+)
+{
+ SKP_int lag;
+ const SKP_float *ptr1;
+
+ ptr1 = &x[ Order - 1 ]; /* Points to first sample of column 0 of X: X[:,0] */
+ for( lag = 0; lag < Order; lag++ ) {
+ /* Calculate X[:,lag]'*t */
+ Xt[ lag ] = (SKP_float)SKP_Silk_inner_product_FLP( ptr1, t, L );
+ ptr1--; /* Next column of X */
+ }
+}
+
+/* Calculates correlation matrix X'*X */
+void SKP_Silk_corrMatrix_FLP(
+ const SKP_float *x, /* I x vector [ L+order-1 ] used to create X */
+ const SKP_int L, /* I Length of vectors */
+ const SKP_int Order, /* I Max lag for correlation */
+ SKP_float *XX /* O X'*X correlation matrix [order x order] */
+)
+{
+ SKP_int j, lag;
+ double energy;
+ const SKP_float *ptr1, *ptr2;
+
+ ptr1 = &x[ Order - 1 ]; /* First sample of column 0 of X */
+ energy = SKP_Silk_energy_FLP( ptr1, L ); /* X[:,0]'*X[:,0] */
+ matrix_ptr( XX, 0, 0, Order ) = ( SKP_float )energy;
+ for( j = 1; j < Order; j++ ) {
+ /* Calculate X[:,j]'*X[:,j] */
+ energy += ptr1[ -j ] * ptr1[ -j ] - ptr1[ L - j ] * ptr1[ L - j ];
+ matrix_ptr( XX, j, j, Order ) = ( SKP_float )energy;
+ }
+
+ ptr2 = &x[ Order - 2 ]; /* First sample of column 1 of X */
+ for( lag = 1; lag < Order; lag++ ) {
+ /* Calculate X[:,0]'*X[:,lag] */
+ energy = SKP_Silk_inner_product_FLP( ptr1, ptr2, L );
+ matrix_ptr( XX, lag, 0, Order ) = ( SKP_float )energy;
+ matrix_ptr( XX, 0, lag, Order ) = ( SKP_float )energy;
+ /* Calculate X[:,j]'*X[:,j + lag] */
+ for( j = 1; j < ( Order - lag ); j++ ) {
+ energy += ptr1[ -j ] * ptr2[ -j ] - ptr1[ L - j ] * ptr2[ L - j ];
+ matrix_ptr( XX, lag + j, j, Order ) = ( SKP_float )energy;
+ matrix_ptr( XX, j, lag + j, Order ) = ( SKP_float )energy;
+ }
+ ptr2--; /* Next column of X */
+ }
+}
--- /dev/null
+++ b/src_FLP/SKP_Silk_encode_frame_FLP.c
@@ -1,0 +1,277 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FLP.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+/****************/
+/* Encode frame */
+/****************/
+SKP_int SKP_Silk_encode_frame_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ SKP_int32 *pnBytesOut, /* O Number of payload bytes */
+ ec_enc *psRangeEnc /* I/O compressor data structure */
+)
+{
+ SKP_Silk_encoder_control_FLP sEncCtrl;
+ SKP_int i, ret = 0;
+ SKP_float *x_frame, *res_pitch_frame;
+ SKP_int16 pIn_HP[ MAX_FRAME_LENGTH ];
+ SKP_float xfw[ MAX_FRAME_LENGTH ];
+ SKP_float res_pitch[ 2 * MAX_FRAME_LENGTH + LA_PITCH_MAX ];
+
+TIC(ENCODE_FRAME)
+
+ psEnc->sCmn.indices.Seed = psEnc->sCmn.frameCounter++ & 3;
+
+ /**************************************************************/
+ /* Setup Input Pointers, and insert frame in input buffer */
+ /*************************************************************/
+ /* pointers aligned with start of frame to encode */
+ x_frame = psEnc->x_buf + psEnc->sCmn.ltp_mem_length; /* start of frame to encode */
+ res_pitch_frame = res_pitch + psEnc->sCmn.ltp_mem_length; /* start of pitch LPC residual frame */
+
+ /****************************/
+ /* Voice Activity Detection */
+ /****************************/
+TIC(VAD)
+ ret = SKP_Silk_VAD_GetSA_Q8( &psEnc->sCmn, psEnc->sCmn.inputBuf );
+TOC(VAD)
+
+ /**************************************************/
+ /* Convert speech activity into VAD and DTX flags */
+ /**************************************************/
+ if( psEnc->sCmn.nFramesAnalyzed == 0 ) {
+ psEnc->sCmn.inDTX = psEnc->sCmn.useDTX;
+ }
+ if( psEnc->sCmn.speech_activity_Q8 < SKP_FIX_CONST( SPEECH_ACTIVITY_DTX_THRES, 8 ) ) {
+ psEnc->sCmn.indices.signalType = TYPE_NO_VOICE_ACTIVITY;
+ psEnc->sCmn.noSpeechCounter++;
+ if( psEnc->sCmn.noSpeechCounter < NB_SPEECH_FRAMES_BEFORE_DTX ) {
+ psEnc->sCmn.inDTX = 0;
+ } else if( psEnc->sCmn.noSpeechCounter > MAX_CONSECUTIVE_DTX + NB_SPEECH_FRAMES_BEFORE_DTX ) {
+ psEnc->sCmn.noSpeechCounter = NB_SPEECH_FRAMES_BEFORE_DTX;
+ psEnc->sCmn.inDTX = 0;
+ }
+ psEnc->sCmn.VAD_flags[ psEnc->sCmn.nFramesAnalyzed ] = 0;
+ } else {
+ psEnc->sCmn.noSpeechCounter = 0;
+ psEnc->sCmn.inDTX = 0;
+ psEnc->sCmn.indices.signalType = TYPE_UNVOICED;
+ psEnc->sCmn.VAD_flags[ psEnc->sCmn.nFramesAnalyzed ] = 1;
+ }
+
+ /*******************************************/
+ /* High-pass filtering of the input signal */
+ /*******************************************/
+TIC(HP_IN)
+ SKP_Silk_HP_variable_cutoff( &psEnc->sCmn, pIn_HP, psEnc->sCmn.inputBuf, psEnc->sCmn.frame_length );
+TOC(HP_IN)
+
+ /* Ensure smooth bandwidth transitions */
+ SKP_Silk_LP_variable_cutoff( &psEnc->sCmn.sLP, pIn_HP, psEnc->sCmn.frame_length );
+
+ /*******************************************/
+ /* Copy new frame to front of input buffer */
+ /*******************************************/
+ SKP_short2float_array( x_frame + LA_SHAPE_MS * psEnc->sCmn.fs_kHz, pIn_HP, psEnc->sCmn.frame_length );
+
+ /* Add tiny signal to avoid high CPU load from denormalized floating point numbers */
+ for( i = 0; i < 8; i++ ) {
+ x_frame[ LA_SHAPE_MS * psEnc->sCmn.fs_kHz + i * ( psEnc->sCmn.frame_length >> 3 ) ] += ( 1 - ( i & 2 ) ) * 1e-6f;
+ }
+
+ /*****************************************/
+ /* Find pitch lags, initial LPC analysis */
+ /*****************************************/
+TIC(FIND_PITCH)
+ SKP_Silk_find_pitch_lags_FLP( psEnc, &sEncCtrl, res_pitch, x_frame );
+TOC(FIND_PITCH)
+
+ /************************/
+ /* Noise shape analysis */
+ /************************/
+TIC(NOISE_SHAPE_ANALYSIS)
+ SKP_Silk_noise_shape_analysis_FLP( psEnc, &sEncCtrl, res_pitch_frame, x_frame );
+TOC(NOISE_SHAPE_ANALYSIS)
+
+ /*****************************************/
+ /* Prefiltering for noise shaper */
+ /*****************************************/
+TIC(PREFILTER)
+ SKP_Silk_prefilter_FLP( psEnc, &sEncCtrl, xfw, x_frame );
+TOC(PREFILTER)
+
+ /***************************************************/
+ /* Find linear prediction coefficients (LPC + LTP) */
+ /***************************************************/
+TIC(FIND_PRED_COEF)
+ SKP_Silk_find_pred_coefs_FLP( psEnc, &sEncCtrl, res_pitch, x_frame );
+TOC(FIND_PRED_COEF)
+
+ /****************************************/
+ /* Process gains */
+ /****************************************/
+TIC(PROCESS_GAINS)
+ SKP_Silk_process_gains_FLP( psEnc, &sEncCtrl );
+TOC(PROCESS_GAINS)
+
+ /****************************************/
+ /* Low Bitrate Redundant Encoding */
+ /****************************************/
+TIC(LBRR)
+ SKP_Silk_LBRR_encode_FLP( psEnc, &sEncCtrl, xfw );
+TOC(LBRR)
+
+ /*****************************************/
+ /* Noise shaping quantization */
+ /*****************************************/
+TIC(NSQ)
+ SKP_Silk_NSQ_wrapper_FLP( psEnc, &sEncCtrl, &psEnc->sCmn.indices, &psEnc->sCmn.sNSQ, psEnc->sCmn.pulses, xfw );
+TOC(NSQ)
+
+ /* Update input buffer */
+ SKP_memmove( psEnc->x_buf, &psEnc->x_buf[ psEnc->sCmn.frame_length ],
+ ( psEnc->sCmn.ltp_mem_length + LA_SHAPE_MS * psEnc->sCmn.fs_kHz ) * sizeof( SKP_float ) );
+
+ /* Parameters needed for next frame */
+ psEnc->sCmn.prevLag = sEncCtrl.pitchL[ psEnc->sCmn.nb_subfr - 1 ];
+ psEnc->sCmn.prevSignalType = psEnc->sCmn.indices.signalType;
+
+ /* Exit without entropy coding */
+ if( psEnc->sCmn.prefillFlag ) {
+ /* No payload */
+ *pnBytesOut = 0;
+ return ret;
+ }
+
+ /****************************************/
+ /* Encode Parameters */
+ /****************************************/
+TIC(ENCODE_PARAMS)
+ SKP_Silk_encode_indices( &psEnc->sCmn, psRangeEnc, psEnc->sCmn.nFramesAnalyzed, 0 );
+TOC(ENCODE_PARAMS)
+
+ /****************************************/
+ /* Encode Excitation Signal */
+ /****************************************/
+TIC(ENCODE_PULSES)
+ SKP_Silk_encode_pulses( psRangeEnc, psEnc->sCmn.indices.signalType, psEnc->sCmn.indices.quantOffsetType,
+ psEnc->sCmn.pulses, psEnc->sCmn.frame_length );
+TOC(ENCODE_PULSES)
+
+ /****************************************/
+ /* Finalize payload */
+ /****************************************/
+ psEnc->sCmn.first_frame_after_reset = 0;
+ if( ++psEnc->sCmn.nFramesAnalyzed >= psEnc->sCmn.nFramesPerPacket ) {
+ /* Payload size */
+ *pnBytesOut = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
+
+ /* Reset the number of frames in payload buffer */
+ psEnc->sCmn.nFramesAnalyzed = 0;
+ } else {
+ /* No payload this time */
+ *pnBytesOut = 0;
+ }
+TOC(ENCODE_FRAME)
+
+#ifdef SAVE_ALL_INTERNAL_DATA
+ //DEBUG_STORE_DATA( xf.dat, pIn_HP_LP, psEnc->sCmn.frame_length * sizeof( SKP_int16 ) );
+ //DEBUG_STORE_DATA( xfw.dat, xfw, psEnc->sCmn.frame_length * sizeof( SKP_float ) );
+ DEBUG_STORE_DATA( pitchL.dat, sEncCtrl.pitchL, MAX_NB_SUBFR * sizeof( SKP_int ) );
+ DEBUG_STORE_DATA( pitchG_quantized.dat, sEncCtrl.LTPCoef, psEnc->sCmn.nb_subfr * LTP_ORDER * sizeof( SKP_float ) );
+ DEBUG_STORE_DATA( LTPcorr.dat, &psEnc->LTPCorr, sizeof( SKP_float ) );
+ DEBUG_STORE_DATA( gains.dat, sEncCtrl.Gains, psEnc->sCmn.nb_subfr * sizeof( SKP_float ) );
+ DEBUG_STORE_DATA( gains_indices.dat, &psEnc->sCmn.indices.GainsIndices, psEnc->sCmn.nb_subfr * sizeof( SKP_int8 ) );
+ DEBUG_STORE_DATA( quantOffsetType.dat, &psEnc->sCmn.indices.quantOffsetType, sizeof( SKP_int8 ) );
+ DEBUG_STORE_DATA( speech_activity_q8.dat, &psEnc->sCmn.speech_activity_Q8, sizeof( SKP_int ) );
+ DEBUG_STORE_DATA( signalType.dat, &psEnc->sCmn.indices.signalType, sizeof( SKP_int8 ) );
+ DEBUG_STORE_DATA( lag_index.dat, &psEnc->sCmn.indices.lagIndex, sizeof( SKP_int16 ) );
+ DEBUG_STORE_DATA( contour_index.dat, &psEnc->sCmn.indices.contourIndex, sizeof( SKP_int8 ) );
+ DEBUG_STORE_DATA( per_index.dat, &psEnc->sCmn.indices.PERIndex, sizeof( SKP_int8 ) );
+ DEBUG_STORE_DATA( PredCoef.dat, &sEncCtrl.PredCoef[ 1 ], psEnc->sCmn.predictLPCOrder * sizeof( SKP_float ) );
+ DEBUG_STORE_DATA( ltp_scale_idx.dat, &psEnc->sCmn.indices.LTP_scaleIndex, sizeof( SKP_int8 ) );
+// DEBUG_STORE_DATA( xq.dat, psEnc->sCmn.sNSQ.xqBuf, psEnc->sCmn.frame_length * sizeof( SKP_float ) );
+#endif
+ return ret;
+}
+
+/* Low-Bitrate Redundancy (LBRR) encoding. Reuse all parameters but encode excitation at lower bitrate */
+void SKP_Silk_LBRR_encode_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
+ const SKP_float xfw[] /* I Input signal */
+)
+{
+ SKP_int k;
+ SKP_int32 Gains_Q16[ MAX_NB_SUBFR ];
+ SKP_float TempGains[ MAX_NB_SUBFR ];
+ SideInfoIndices *psIndices_LBRR = &psEnc->sCmn.indices_LBRR[ psEnc->sCmn.nFramesAnalyzed ];
+ SKP_Silk_nsq_state sNSQ_LBRR;
+
+ /*******************************************/
+ /* Control use of inband LBRR */
+ /*******************************************/
+ if( psEnc->sCmn.LBRR_enabled && psEnc->sCmn.speech_activity_Q8 > SKP_FIX_CONST( LBRR_SPEECH_ACTIVITY_THRES, 8 ) ) {
+ psEnc->sCmn.LBRR_flags[ psEnc->sCmn.nFramesAnalyzed ] = 1;
+
+ /* Copy noise shaping quantizer state and quantization indices from regular encoding */
+ SKP_memcpy( &sNSQ_LBRR, &psEnc->sCmn.sNSQ, sizeof( SKP_Silk_nsq_state ) );
+ SKP_memcpy( psIndices_LBRR, &psEnc->sCmn.indices, sizeof( SideInfoIndices ) );
+
+ /* Save original gains */
+ SKP_memcpy( TempGains, psEncCtrl->Gains, psEnc->sCmn.nb_subfr * sizeof( SKP_float ) );
+
+ if( psEnc->sCmn.nFramesAnalyzed == 0 || psEnc->sCmn.LBRR_flags[ psEnc->sCmn.nFramesAnalyzed - 1 ] == 0 ) {
+ /* First frame in packet or previous frame not LBRR coded */
+ psEnc->sCmn.LBRRprevLastGainIndex = psEnc->sShape.LastGainIndex;
+
+ /* Increase Gains to get target LBRR rate */
+ psIndices_LBRR->GainsIndices[ 0 ] += psEnc->sCmn.LBRR_GainIncreases;
+ psIndices_LBRR->GainsIndices[ 0 ] = SKP_min_int( psIndices_LBRR->GainsIndices[ 0 ], N_LEVELS_QGAIN - 1 );
+ }
+
+ /* Decode to get gains in sync with decoder */
+ SKP_Silk_gains_dequant( Gains_Q16, psIndices_LBRR->GainsIndices,
+ &psEnc->sCmn.LBRRprevLastGainIndex, psEnc->sCmn.nFramesAnalyzed, psEnc->sCmn.nb_subfr );
+
+ /* Overwrite unquantized gains with quantized gains and convert back to Q0 from Q16 */
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ psEncCtrl->Gains[ k ] = Gains_Q16[ k ] / 65536.0f;
+ }
+
+ /*****************************************/
+ /* Noise shaping quantization */
+ /*****************************************/
+ SKP_Silk_NSQ_wrapper_FLP( psEnc, psEncCtrl, psIndices_LBRR, &sNSQ_LBRR,
+ psEnc->sCmn.pulses_LBRR[ psEnc->sCmn.nFramesAnalyzed ], xfw );
+
+ /* Restore original gains */
+ SKP_memcpy( psEncCtrl->Gains, TempGains, psEnc->sCmn.nb_subfr * sizeof( SKP_float ) );
+ }
+}
--- /dev/null
+++ b/src_FLP/SKP_Silk_find_LPC_FLP.c
@@ -1,0 +1,109 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FLP.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+void SKP_Silk_find_LPC_FLP(
+ SKP_int16 NLSF_Q15[], /* O NLSFs */
+ SKP_int8 *interpIndex, /* O NLSF interp. index for NLSF interp. */
+ const SKP_int16 prev_NLSFq_Q15[], /* I Previous NLSFs, for NLSF interpolation */
+ const SKP_int useInterpNLSFs, /* I Flag */
+ const SKP_int firstFrameAfterReset, /* I Flag */
+ const SKP_int LPC_order, /* I LPC order */
+ const SKP_float x[], /* I Input signal */
+ const SKP_int subfr_length, /* I Subframe length incl preceeding samples */
+ const SKP_int nb_subfr /* I: Number of subframes */
+)
+{
+ SKP_int k;
+ SKP_float a[ MAX_LPC_ORDER ];
+
+ /* Used only for NLSF interpolation */
+ double res_nrg, res_nrg_2nd, res_nrg_interp;
+ SKP_int16 NLSF0_Q15[ MAX_LPC_ORDER ];
+ SKP_float a_tmp[ MAX_LPC_ORDER ];
+ SKP_float LPC_res[ ( MAX_FRAME_LENGTH + MAX_NB_SUBFR * MAX_LPC_ORDER ) / 2 ];
+
+ /* Default: No interpolation */
+ *interpIndex = 4;
+
+ /* Burg AR analysis for the full frame */
+ res_nrg = SKP_Silk_burg_modified_FLP( a, x, subfr_length, nb_subfr, FIND_LPC_COND_FAC, LPC_order );
+
+ if( firstFrameAfterReset ) {
+ SKP_Silk_bwexpander_FLP( a, LPC_order, FIND_LPC_CHIRP_FIRST_FRAME );
+ } else {
+ SKP_Silk_bwexpander_FLP( a_tmp, LPC_order, FIND_LPC_CHIRP );
+ }
+
+ if( useInterpNLSFs && !firstFrameAfterReset && nb_subfr == MAX_NB_SUBFR ) {
+ /* Optimal solution for last 10 ms; subtract residual energy here, as that's easier than */
+ /* adding it to the residual energy of the first 10 ms in each iteration of the search below */
+ res_nrg -= SKP_Silk_burg_modified_FLP( a_tmp, x + ( MAX_NB_SUBFR / 2 ) * subfr_length,
+ subfr_length, MAX_NB_SUBFR / 2, FIND_LPC_COND_FAC, LPC_order );
+
+ SKP_Silk_bwexpander_FLP( a_tmp, LPC_order, FIND_LPC_CHIRP );
+
+ /* Convert to NLSFs */
+ SKP_Silk_A2NLSF_FLP( NLSF_Q15, a_tmp, LPC_order );
+
+ /* Search over interpolation indices to find the one with lowest residual energy */
+ res_nrg_2nd = SKP_float_MAX;
+ for( k = 3; k >= 0; k-- ) {
+ /* Interpolate NLSFs for first half */
+ SKP_Silk_interpolate( NLSF0_Q15, prev_NLSFq_Q15, NLSF_Q15, k, LPC_order );
+
+ /* Convert to LPC for residual energy evaluation */
+ SKP_Silk_NLSF2A_stable_FLP( a_tmp, NLSF0_Q15, LPC_order );
+
+ /* Calculate residual energy with LSF interpolation */
+ SKP_Silk_LPC_analysis_filter_FLP( LPC_res, a_tmp, x, 2 * subfr_length, LPC_order );
+ res_nrg_interp =
+ SKP_Silk_energy_FLP( LPC_res + LPC_order, subfr_length - LPC_order ) +
+ SKP_Silk_energy_FLP( LPC_res + LPC_order + subfr_length, subfr_length - LPC_order );
+
+ /* Determine whether current interpolated NLSFs are best so far */
+ if( res_nrg_interp < res_nrg ) {
+ /* Interpolation has lower residual energy */
+ res_nrg = res_nrg_interp;
+ *interpIndex = (SKP_int8)k;
+ } else if( res_nrg_interp > res_nrg_2nd ) {
+ /* No reason to continue iterating - residual energies will continue to climb */
+ break;
+ }
+ res_nrg_2nd = res_nrg_interp;
+ }
+ }
+
+ if( *interpIndex == 4 ) {
+ /* NLSF interpolation is currently inactive, calculate NLSFs from full frame AR coefficients */
+ SKP_Silk_A2NLSF_FLP( NLSF_Q15, a, LPC_order );
+ }
+
+ SKP_assert( *interpIndex == 4 || ( useInterpNLSFs && !firstFrameAfterReset && nb_subfr == MAX_NB_SUBFR ) );
+}
--- /dev/null
+++ b/src_FLP/SKP_Silk_find_LTP_FLP.c
@@ -1,0 +1,128 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FLP.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+void SKP_Silk_find_LTP_FLP(
+ SKP_float b[ MAX_NB_SUBFR * LTP_ORDER ], /* O LTP coefs */
+ SKP_float WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */
+ SKP_float *LTPredCodGain, /* O LTP coding gain */
+ const SKP_float r_lpc[], /* I LPC residual */
+ const SKP_int lag[ MAX_NB_SUBFR ], /* I LTP lags */
+ const SKP_float Wght[ MAX_NB_SUBFR ], /* I Weights */
+ const SKP_int subfr_length, /* I Subframe length */
+ const SKP_int nb_subfr, /* I number of subframes */
+ const SKP_int mem_offset /* I Number of samples in LTP memory */
+)
+{
+ SKP_int i, k;
+ SKP_float *b_ptr, temp, *WLTP_ptr;
+ SKP_float LPC_res_nrg, LPC_LTP_res_nrg;
+ SKP_float d[ MAX_NB_SUBFR ], m, g, delta_b[ LTP_ORDER ];
+ SKP_float w[ MAX_NB_SUBFR ], nrg[ MAX_NB_SUBFR ], regu;
+ SKP_float Rr[ LTP_ORDER ], rr[ MAX_NB_SUBFR ];
+ const SKP_float *r_ptr, *lag_ptr;
+
+ b_ptr = b;
+ WLTP_ptr = WLTP;
+ r_ptr = &r_lpc[ mem_offset ];
+ for( k = 0; k < nb_subfr; k++ ) {
+ lag_ptr = r_ptr - ( lag[ k ] + LTP_ORDER / 2 );
+
+ SKP_Silk_corrMatrix_FLP( lag_ptr, subfr_length, LTP_ORDER, WLTP_ptr );
+ SKP_Silk_corrVector_FLP( lag_ptr, r_ptr, subfr_length, LTP_ORDER, Rr );
+
+ rr[ k ] = ( SKP_float )SKP_Silk_energy_FLP( r_ptr, subfr_length );
+ regu = 1.0f + rr[ k ] +
+ matrix_ptr( WLTP_ptr, 0, 0, LTP_ORDER ) +
+ matrix_ptr( WLTP_ptr, LTP_ORDER-1, LTP_ORDER-1, LTP_ORDER );
+ regu *= LTP_DAMPING / 3;
+ SKP_Silk_regularize_correlations_FLP( WLTP_ptr, &rr[ k ], regu, LTP_ORDER );
+ SKP_Silk_solve_LDL_FLP( WLTP_ptr, LTP_ORDER, Rr, b_ptr );
+
+ /* Calculate residual energy */
+ nrg[ k ] = SKP_Silk_residual_energy_covar_FLP( b_ptr, WLTP_ptr, Rr, rr[ k ], LTP_ORDER );
+
+ temp = Wght[ k ] / ( nrg[ k ] * Wght[ k ] + 0.01f * subfr_length );
+ SKP_Silk_scale_vector_FLP( WLTP_ptr, temp, LTP_ORDER * LTP_ORDER );
+ w[ k ] = matrix_ptr( WLTP_ptr, LTP_ORDER / 2, LTP_ORDER / 2, LTP_ORDER );
+
+ r_ptr += subfr_length;
+ b_ptr += LTP_ORDER;
+ WLTP_ptr += LTP_ORDER * LTP_ORDER;
+ }
+
+ /* Compute LTP coding gain */
+ if( LTPredCodGain != NULL ) {
+ LPC_LTP_res_nrg = 1e-6f;
+ LPC_res_nrg = 0.0f;
+ for( k = 0; k < nb_subfr; k++ ) {
+ LPC_res_nrg += rr[ k ] * Wght[ k ];
+ LPC_LTP_res_nrg += nrg[ k ] * Wght[ k ];
+ }
+
+ SKP_assert( LPC_LTP_res_nrg > 0 );
+ *LTPredCodGain = 3.0f * SKP_Silk_log2( LPC_res_nrg / LPC_LTP_res_nrg );
+ }
+
+ /* Smoothing */
+ /* d = sum( B, 1 ); */
+ b_ptr = b;
+ for( k = 0; k < nb_subfr; k++ ) {
+ d[ k ] = 0;
+ for( i = 0; i < LTP_ORDER; i++ ) {
+ d[ k ] += b_ptr[ i ];
+ }
+ b_ptr += LTP_ORDER;
+ }
+ /* m = ( w * d' ) / ( sum( w ) + 1e-3 ); */
+ temp = 1e-3f;
+ for( k = 0; k < nb_subfr; k++ ) {
+ temp += w[ k ];
+ }
+ m = 0;
+ for( k = 0; k < nb_subfr; k++ ) {
+ m += d[ k ] * w[ k ];
+ }
+ m = m / temp;
+
+ b_ptr = b;
+ for( k = 0; k < nb_subfr; k++ ) {
+ g = LTP_SMOOTHING / ( LTP_SMOOTHING + w[ k ] ) * ( m - d[ k ] );
+ temp = 0;
+ for( i = 0; i < LTP_ORDER; i++ ) {
+ delta_b[ i ] = SKP_max_float( b_ptr[ i ], 0.1f );
+ temp += delta_b[ i ];
+ }
+ temp = g / temp;
+ for( i = 0; i < LTP_ORDER; i++ ) {
+ b_ptr[ i ] = b_ptr[ i ] + delta_b[ i ] * temp;
+ }
+ b_ptr += LTP_ORDER;
+ }
+}
--- /dev/null
+++ b/src_FLP/SKP_Silk_find_pitch_lags_FLP.c
@@ -1,0 +1,127 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include <stdlib.h>
+#include "SKP_Silk_main_FLP.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+void SKP_Silk_find_pitch_lags_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
+ SKP_float res[], /* O Residual */
+ const SKP_float x[] /* I Speech signal */
+)
+{
+ SKP_int buf_len;
+ SKP_float thrhld, res_nrg;
+ const SKP_float *x_buf_ptr, *x_buf;
+ SKP_float auto_corr[ MAX_FIND_PITCH_LPC_ORDER + 1 ];
+ SKP_float A[ MAX_FIND_PITCH_LPC_ORDER ];
+ SKP_float refl_coef[ MAX_FIND_PITCH_LPC_ORDER ];
+ SKP_float Wsig[ FIND_PITCH_LPC_WIN_MAX ];
+ SKP_float *Wsig_ptr;
+
+ /******************************************/
+ /* Setup buffer lengths etc based on Fs */
+ /******************************************/
+ buf_len = psEnc->sCmn.la_pitch + psEnc->sCmn.frame_length + psEnc->sCmn.ltp_mem_length;
+
+ /* Safty check */
+ SKP_assert( buf_len >= psEnc->sCmn.pitch_LPC_win_length );
+
+ x_buf = x - psEnc->sCmn.ltp_mem_length;
+
+ /******************************************/
+ /* Estimate LPC AR coeficients */
+ /******************************************/
+
+ /* Calculate windowed signal */
+
+ /* First LA_LTP samples */
+ x_buf_ptr = x_buf + buf_len - psEnc->sCmn.pitch_LPC_win_length;
+ Wsig_ptr = Wsig;
+ SKP_Silk_apply_sine_window_FLP( Wsig_ptr, x_buf_ptr, 1, psEnc->sCmn.la_pitch );
+
+ /* Middle non-windowed samples */
+ Wsig_ptr += psEnc->sCmn.la_pitch;
+ x_buf_ptr += psEnc->sCmn.la_pitch;
+ SKP_memcpy( Wsig_ptr, x_buf_ptr, ( psEnc->sCmn.pitch_LPC_win_length - ( psEnc->sCmn.la_pitch << 1 ) ) * sizeof( SKP_float ) );
+
+ /* Last LA_LTP samples */
+ Wsig_ptr += psEnc->sCmn.pitch_LPC_win_length - ( psEnc->sCmn.la_pitch << 1 );
+ x_buf_ptr += psEnc->sCmn.pitch_LPC_win_length - ( psEnc->sCmn.la_pitch << 1 );
+ SKP_Silk_apply_sine_window_FLP( Wsig_ptr, x_buf_ptr, 2, psEnc->sCmn.la_pitch );
+
+ /* Calculate autocorrelation sequence */
+ SKP_Silk_autocorrelation_FLP( auto_corr, Wsig, psEnc->sCmn.pitch_LPC_win_length, psEnc->sCmn.pitchEstimationLPCOrder + 1 );
+
+ /* Add white noise, as a fraction of the energy */
+ auto_corr[ 0 ] += auto_corr[ 0 ] * FIND_PITCH_WHITE_NOISE_FRACTION + 1;
+
+ /* Calculate the reflection coefficients using Schur */
+ res_nrg = SKP_Silk_schur_FLP( refl_coef, auto_corr, psEnc->sCmn.pitchEstimationLPCOrder );
+
+ /* Prediction gain */
+ psEncCtrl->predGain = auto_corr[ 0 ] / SKP_max_float( res_nrg, 1.0f );
+
+ /* Convert reflection coefficients to prediction coefficients */
+ SKP_Silk_k2a_FLP( A, refl_coef, psEnc->sCmn.pitchEstimationLPCOrder );
+
+ /* Bandwidth expansion */
+ SKP_Silk_bwexpander_FLP( A, psEnc->sCmn.pitchEstimationLPCOrder, FIND_PITCH_BANDWITH_EXPANSION );
+
+ /*****************************************/
+ /* LPC analysis filtering */
+ /*****************************************/
+ SKP_Silk_LPC_analysis_filter_FLP( res, A, x_buf, buf_len, psEnc->sCmn.pitchEstimationLPCOrder );
+
+ if( psEnc->sCmn.indices.signalType != TYPE_NO_VOICE_ACTIVITY && psEnc->sCmn.first_frame_after_reset == 0 ) {
+ /* Threshold for pitch estimator */
+ thrhld = 0.6f;
+ thrhld -= 0.004f * psEnc->sCmn.pitchEstimationLPCOrder;
+ thrhld -= 0.1f * psEnc->sCmn.speech_activity_Q8 * ( 1.0f / 256.0f );
+ thrhld -= 0.15f * (psEnc->sCmn.prevSignalType >> 1);
+ thrhld -= 0.1f * psEnc->sCmn.input_tilt_Q15 * ( 1.0f / 32768.0f );
+
+ /*****************************************/
+ /* Call Pitch estimator */
+ /*****************************************/
+ if( SKP_Silk_pitch_analysis_core_FLP( res, psEncCtrl->pitchL, &psEnc->sCmn.indices.lagIndex,
+ &psEnc->sCmn.indices.contourIndex, &psEnc->LTPCorr, psEnc->sCmn.prevLag, psEnc->sCmn.pitchEstimationThreshold_Q16 / 65536.0f,
+ thrhld, psEnc->sCmn.fs_kHz, psEnc->sCmn.pitchEstimationComplexity, psEnc->sCmn.nb_subfr ) == 0 )
+ {
+ psEnc->sCmn.indices.signalType = TYPE_VOICED;
+ } else {
+ psEnc->sCmn.indices.signalType = TYPE_UNVOICED;
+ }
+ } else {
+ SKP_memset( psEncCtrl->pitchL, 0, sizeof( psEncCtrl->pitchL ) );
+ psEnc->sCmn.indices.lagIndex = 0;
+ psEnc->sCmn.indices.contourIndex = 0;
+ psEnc->LTPCorr = 0;
+ }
+}
--- /dev/null
+++ b/src_FLP/SKP_Silk_find_pred_coefs_FLP.c
@@ -1,0 +1,114 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FLP.h"
+
+
+void SKP_Silk_find_pred_coefs_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
+ const SKP_float res_pitch[], /* I Residual from pitch analysis */
+ const SKP_float x[] /* I Speech signal */
+)
+{
+ SKP_int i;
+ SKP_float WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ];
+ SKP_float invGains[ MAX_NB_SUBFR ], Wght[ MAX_NB_SUBFR ];
+ SKP_int16 NLSF_Q15[ MAX_LPC_ORDER ];
+ const SKP_float *x_ptr;
+ SKP_float *x_pre_ptr, LPC_in_pre[ MAX_NB_SUBFR * MAX_LPC_ORDER + MAX_FRAME_LENGTH ];
+
+ /* Weighting for weighted least squares */
+ for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
+ SKP_assert( psEncCtrl->Gains[ i ] > 0.0f );
+ invGains[ i ] = 1.0f / psEncCtrl->Gains[ i ];
+ Wght[ i ] = invGains[ i ] * invGains[ i ];
+ }
+
+ if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
+ /**********/
+ /* VOICED */
+ /**********/
+ SKP_assert( psEnc->sCmn.ltp_mem_length - psEnc->sCmn.predictLPCOrder >= psEncCtrl->pitchL[ 0 ] + LTP_ORDER / 2 );
+
+ /* LTP analysis */
+ SKP_Silk_find_LTP_FLP( psEncCtrl->LTPCoef, WLTP, &psEncCtrl->LTPredCodGain, res_pitch,
+ psEncCtrl->pitchL, Wght, psEnc->sCmn.subfr_length, psEnc->sCmn.nb_subfr, psEnc->sCmn.ltp_mem_length );
+
+#ifdef SAVE_ALL_INTERNAL_DATA
+ DEBUG_STORE_DATA( ltp_gains.dat, psEncCtrl->LTPCoef, sizeof( psEncCtrl->LTPCoef ) );
+ DEBUG_STORE_DATA( ltp_weights.dat, WLTP, sizeof( WLTP ) );
+#endif
+
+ /* Quantize LTP gain parameters */
+ SKP_Silk_quant_LTP_gains_FLP( psEncCtrl->LTPCoef, psEnc->sCmn.indices.LTPIndex, &psEnc->sCmn.indices.PERIndex,
+ WLTP, psEnc->sCmn.mu_LTP_Q9, psEnc->sCmn.LTPQuantLowComplexity , psEnc->sCmn.nb_subfr );
+
+ /* Control LTP scaling */
+ SKP_Silk_LTP_scale_ctrl_FLP( psEnc, psEncCtrl );
+
+ /* Create LTP residual */
+ SKP_Silk_LTP_analysis_filter_FLP( LPC_in_pre, psEnc->x_buf + psEnc->sCmn.ltp_mem_length - psEnc->sCmn.predictLPCOrder,
+ psEncCtrl->LTPCoef, psEncCtrl->pitchL, invGains, psEnc->sCmn.subfr_length, psEnc->sCmn.nb_subfr, psEnc->sCmn.predictLPCOrder );
+
+ } else {
+ /************/
+ /* UNVOICED */
+ /************/
+ /* Create signal with prepended subframes, scaled by inverse gains */
+ x_ptr = x - psEnc->sCmn.predictLPCOrder;
+ x_pre_ptr = LPC_in_pre;
+ for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
+ SKP_Silk_scale_copy_vector_FLP( x_pre_ptr, x_ptr, invGains[ i ],
+ psEnc->sCmn.subfr_length + psEnc->sCmn.predictLPCOrder );
+ x_pre_ptr += psEnc->sCmn.subfr_length + psEnc->sCmn.predictLPCOrder;
+ x_ptr += psEnc->sCmn.subfr_length;
+ }
+
+ SKP_memset( psEncCtrl->LTPCoef, 0, psEnc->sCmn.nb_subfr * LTP_ORDER * sizeof( SKP_float ) );
+ psEncCtrl->LTPredCodGain = 0.0f;
+ }
+
+ /* LPC_in_pre contains the LTP-filtered input for voiced, and the unfiltered input for unvoiced */
+ SKP_Silk_find_LPC_FLP( NLSF_Q15, &psEnc->sCmn.indices.NLSFInterpCoef_Q2, psEnc->sCmn.prev_NLSFq_Q15,
+ psEnc->sCmn.useInterpolatedNLSFs, psEnc->sCmn.first_frame_after_reset, psEnc->sCmn.predictLPCOrder,
+ LPC_in_pre, psEnc->sCmn.subfr_length + psEnc->sCmn.predictLPCOrder, psEnc->sCmn.nb_subfr );
+
+
+ /* Quantize LSFs */
+TIC(LSF_quant);
+ SKP_Silk_process_NLSFs_FLP( &psEnc->sCmn, psEncCtrl->PredCoef, NLSF_Q15, psEnc->sCmn.prev_NLSFq_Q15 );
+TOC(LSF_quant);
+
+ /* Calculate residual energy using quantized LPC coefficients */
+ SKP_Silk_residual_energy_FLP( psEncCtrl->ResNrg, LPC_in_pre, psEncCtrl->PredCoef, psEncCtrl->Gains,
+ psEnc->sCmn.subfr_length, psEnc->sCmn.nb_subfr, psEnc->sCmn.predictLPCOrder );
+
+ /* Copy to prediction struct for use in next frame for fluctuation reduction */
+ SKP_memcpy( psEnc->sCmn.prev_NLSFq_Q15, NLSF_Q15, sizeof( psEnc->sCmn.prev_NLSFq_Q15 ) );
+}
+
--- /dev/null
+++ b/src_FLP/SKP_Silk_main_FLP.h
@@ -1,0 +1,319 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef SKP_SILK_MAIN_FLP_H
+#define SKP_SILK_MAIN_FLP_H
+
+#include "SKP_Silk_SigProc_FLP.h"
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_structs_FLP.h"
+#include "SKP_Silk_main.h"
+#include "SKP_Silk_define.h"
+#include "SKP_debug.h"
+#include "entenc.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/*********************/
+/* Encoder Functions */
+/*********************/
+
+/* Encoder main function */
+SKP_int SKP_Silk_encode_frame_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ SKP_int32 *pnBytesOut, /* O Number of payload bytes; */
+ ec_enc *psRangeEnc /* I/O compressor data structure */
+);
+
+/* Low Bitrate Redundancy (LBRR) encoding. Reuse all parameters but encode with lower bitrate */
+void SKP_Silk_LBRR_encode_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
+ const SKP_float xfw[] /* I Input signal */
+);
+
+/* Initializes the Silk encoder state */
+SKP_int SKP_Silk_init_encoder(
+ SKP_Silk_encoder_state_FLP *psEnc /* I/O Encoder state FLP */
+);
+
+/* Control the Silk encoder */
+SKP_int SKP_Silk_control_encoder(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Pointer to Silk encoder state FLP */
+ SKP_SILK_SDK_EncControlStruct *encControl, /* I: Control structure */
+ const SKP_int32 TargetRate_bps, /* I Target max bitrate (bps) */
+ const SKP_int allow_bw_switch /* I Flag to allow switching audio bandwidth */
+);
+
+/****************/
+/* Prefiltering */
+/****************/
+void SKP_Silk_prefilter_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ const SKP_Silk_encoder_control_FLP *psEncCtrl, /* I Encoder control FLP */
+ SKP_float xw[], /* O Weighted signal */
+ const SKP_float x[] /* I Speech signal */
+);
+
+/**************************/
+/* Noise shaping analysis */
+/**************************/
+/* Compute noise shaping coefficients and initial gain values */
+void SKP_Silk_noise_shape_analysis_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
+ const SKP_float *pitch_res, /* I LPC residual from pitch analysis */
+ const SKP_float *x /* I Input signal [frame_length + la_shape] */
+);
+
+/* Autocorrelations for a warped frequency axis */
+void SKP_Silk_warped_autocorrelation_FLP(
+ SKP_float *corr, /* O Result [order + 1] */
+ const SKP_float *input, /* I Input data to correlate */
+ const SKP_float warping, /* I Warping coefficient */
+ const SKP_int length, /* I Length of input */
+ const SKP_int order /* I Correlation order (even) */
+);
+
+/* Calculation of LTP state scaling */
+void SKP_Silk_LTP_scale_ctrl_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ SKP_Silk_encoder_control_FLP *psEncCtrl /* I/O Encoder control FLP */
+);
+
+/**********************************************/
+/* Prediction Analysis */
+/**********************************************/
+/* Find pitch lags */
+void SKP_Silk_find_pitch_lags_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
+ SKP_float res[], /* O Residual */
+ const SKP_float x[] /* I Speech signal */
+);
+
+/* Find LPC and LTP coefficients */
+void SKP_Silk_find_pred_coefs_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
+ const SKP_float res_pitch[], /* I Residual from pitch analysis */
+ const SKP_float x[] /* I Speech signal */
+);
+
+/* LPC analysis */
+void SKP_Silk_find_LPC_FLP(
+ SKP_int16 NLSF_Q15[], /* O NLSFs */
+ SKP_int8 *interpIndex, /* O NLSF interp. index for NLSF interp. */
+ const SKP_int16 prev_NLSFq_Q15[], /* I Previous NLSFs, for NLSF interpolation */
+ const SKP_int useInterpNLSFs, /* I Flag */
+ const SKP_int firstFrameAfterReset, /* I Flag */
+ const SKP_int LPC_order, /* I LPC order */
+ const SKP_float x[], /* I Input signal */
+ const SKP_int subfr_length, /* I Subframe length incl preceeding samples */
+ const SKP_int nb_subfr /* I: Number of subframes */
+);
+
+/* LTP analysis */
+void SKP_Silk_find_LTP_FLP(
+ SKP_float b[ MAX_NB_SUBFR * LTP_ORDER ], /* O LTP coefs */
+ SKP_float WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */
+ SKP_float *LTPredCodGain, /* O LTP coding gain */
+ const SKP_float r_lpc[], /* I LPC residual */
+ const SKP_int lag[ MAX_NB_SUBFR ], /* I LTP lags */
+ const SKP_float Wght[ MAX_NB_SUBFR ], /* I Weights */
+ const SKP_int subfr_length, /* I Subframe length */
+ const SKP_int nb_subfr, /* I number of subframes */
+ const SKP_int mem_offset /* I Number of samples in LTP memory */
+);
+
+void SKP_Silk_LTP_analysis_filter_FLP(
+ SKP_float *LTP_res, /* O LTP res MAX_NB_SUBFR*(pre_lgth+subfr_lngth) */
+ const SKP_float *x, /* I Input signal, with preceeding samples */
+ const SKP_float B[ LTP_ORDER * MAX_NB_SUBFR ], /* I LTP coefficients for each subframe */
+ const SKP_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */
+ const SKP_float invGains[ MAX_NB_SUBFR ], /* I Inverse quantization gains */
+ const SKP_int subfr_length, /* I Length of each subframe */
+ const SKP_int nb_subfr, /* I number of subframes */
+ const SKP_int pre_length /* I Preceeding samples for each subframe */
+);
+
+/* Calculates residual energies of input subframes where all subframes have LPC_order */
+/* of preceeding samples */
+void SKP_Silk_residual_energy_FLP(
+ SKP_float nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */
+ const SKP_float x[], /* I Input signal */
+ const SKP_float a[ 2 ][ MAX_LPC_ORDER ],/* I AR coefs for each frame half */
+ const SKP_float gains[], /* I Quantization gains */
+ const SKP_int subfr_length, /* I Subframe length */
+ const SKP_int nb_subfr, /* I number of subframes */
+ const SKP_int LPC_order /* I LPC order */
+);
+
+/* 16th order LPC analysis filter */
+void SKP_Silk_LPC_analysis_filter_FLP(
+ SKP_float r_LPC[], /* O LPC residual signal */
+ const SKP_float PredCoef[], /* I LPC coefficients */
+ const SKP_float s[], /* I Input signal */
+ const SKP_int length, /* I Length of input signal */
+ const SKP_int Order /* I LPC order */
+);
+
+/* LTP tap quantizer */
+void SKP_Silk_quant_LTP_gains_FLP(
+ SKP_float B[ MAX_NB_SUBFR * LTP_ORDER ], /* I/O (Un-)quantized LTP gains */
+ SKP_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook index */
+ SKP_int8 *periodicity_index, /* O Periodicity index */
+ const SKP_float W[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* I Error weights */
+ const SKP_int mu_Q10, /* I Mu value (R/D tradeoff) */
+ const SKP_int lowComplexity, /* I Flag for low complexity */
+ const SKP_int nb_subfr /* I number of subframes */
+);
+
+/******************/
+/* NLSF Quantizer */
+/******************/
+/* Limit, stabilize, and quantize NLSFs */
+void SKP_Silk_process_NLSFs_FLP(
+ SKP_Silk_encoder_state *psEncC, /* I/O Encoder state */
+ SKP_float PredCoef[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */
+ SKP_int16 NLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */
+ const SKP_int16 prev_NLSF_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */
+);
+
+/* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */
+SKP_float SKP_Silk_residual_energy_covar_FLP( /* O Weighted residual energy */
+ const SKP_float *c, /* I Filter coefficients */
+ SKP_float *wXX, /* I/O Weighted correlation matrix, reg. out */
+ const SKP_float *wXx, /* I Weighted correlation vector */
+ const SKP_float wxx, /* I Weighted correlation value */
+ const SKP_int D /* I Dimension */
+);
+
+/* Entropy constrained MATRIX-weighted VQ, for a single input data vector */
+void SKP_Silk_VQ_WMat_EC_FLP(
+ SKP_int *ind, /* O Index of best codebook vector */
+ SKP_float *rate_dist, /* O Best weighted quant. error + mu * rate */
+ const SKP_float *in, /* I Input vector to be quantized */
+ const SKP_float *W, /* I Weighting matrix */
+ const SKP_int16 *cb, /* I Codebook */
+ const SKP_int16 *cl_Q6, /* I Code length for each codebook vector */
+ const SKP_float mu, /* I Tradeoff between WSSE and rate */
+ const SKP_int L /* I Number of vectors in codebook */
+);
+
+/* Processing of gains */
+void SKP_Silk_process_gains_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ SKP_Silk_encoder_control_FLP *psEncCtrl /* I/O Encoder control FLP */
+);
+
+/******************/
+/* Linear Algebra */
+/******************/
+/* Calculates correlation matrix X'*X */
+void SKP_Silk_corrMatrix_FLP(
+ const SKP_float *x, /* I x vector [ L+order-1 ] used to create X */
+ const SKP_int L, /* I Length of vectors */
+ const SKP_int Order, /* I Max lag for correlation */
+ SKP_float *XX /* O X'*X correlation matrix [order x order] */
+);
+
+/* Calculates correlation vector X'*t */
+void SKP_Silk_corrVector_FLP(
+ const SKP_float *x, /* I x vector [L+order-1] used to create X */
+ const SKP_float *t, /* I Target vector [L] */
+ const SKP_int L, /* I Length of vecors */
+ const SKP_int Order, /* I Max lag for correlation */
+ SKP_float *Xt /* O X'*t correlation vector [order] */
+);
+
+/* Add noise to matrix diagonal */
+void SKP_Silk_regularize_correlations_FLP(
+ SKP_float *XX, /* I/O Correlation matrices */
+ SKP_float *xx, /* I/O Correlation values */
+ const SKP_float noise, /* I Noise energy to add */
+ const SKP_int D /* I Dimension of XX */
+);
+
+/* Function to solve linear equation Ax = b, where A is an MxM symmetric matrix */
+void SKP_Silk_solve_LDL_FLP(
+ SKP_float *A, /* I/O Symmetric square matrix, out: reg. */
+ const SKP_int M, /* I Size of matrix */
+ const SKP_float *b, /* I Pointer to b vector */
+ SKP_float *x /* O Pointer to x solution vector */
+);
+
+/* Apply sine window to signal vector. */
+/* Window types: */
+/* 1 -> sine window from 0 to pi/2 */
+/* 2 -> sine window from pi/2 to pi */
+void SKP_Silk_apply_sine_window_FLP(
+ SKP_float px_win[], /* O Pointer to windowed signal */
+ const SKP_float px[], /* I Pointer to input signal */
+ const SKP_int win_type, /* I Selects a window type */
+ const SKP_int length /* I Window length, multiple of 4 */
+);
+
+/* Wrappers. Calls flp / fix code */
+
+/* Convert AR filter coefficients to NLSF parameters */
+void SKP_Silk_A2NLSF_FLP(
+ SKP_int16 *NLSF_Q15, /* O NLSF vector [ LPC_order ] */
+ const SKP_float *pAR, /* I LPC coefficients [ LPC_order ] */
+ const SKP_int LPC_order /* I LPC order */
+);
+
+/* Convert NLSF parameters to AR prediction filter coefficients */
+void SKP_Silk_NLSF2A_stable_FLP(
+ SKP_float *pAR, /* O LPC coefficients [ LPC_order ] */
+ const SKP_int16 *NLSF_Q15, /* I NLSF vector [ LPC_order ] */
+ const SKP_int LPC_order /* I LPC order */
+);
+
+/****************************************/
+/* Floating-point Silk NSQ wrapper */
+/****************************************/
+void SKP_Silk_NSQ_wrapper_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
+ SideInfoIndices *psIndices, /* I/O Quantization indices */
+ SKP_Silk_nsq_state *psNSQ, /* I/O Noise Shaping Quantzation state */
+ SKP_int8 pulses[], /* O Quantized pulse signal */
+ const SKP_float x[] /* I Prefiltered input signal */
+);
+
+/* using log2() helps the fixed-point conversion */
+SKP_INLINE SKP_float SKP_Silk_log2( double x ) { return ( SKP_float )( 3.32192809488736 * log10( x ) ); }
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+++ b/src_FLP/SKP_Silk_noise_shape_analysis_FLP.c
@@ -1,0 +1,359 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FLP.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+/* Compute gain to make warped filter coefficients have a zero mean log frequency response on a */
+/* non-warped frequency scale. (So that it can be implemented with a minimum-phase monic filter.) */
+SKP_INLINE SKP_float warped_gain(
+ const SKP_float *coefs,
+ SKP_float lambda,
+ SKP_int order
+) {
+ SKP_int i;
+ SKP_float gain;
+
+ lambda = -lambda;
+ gain = coefs[ order - 1 ];
+ for( i = order - 2; i >= 0; i-- ) {
+ gain = lambda * gain + coefs[ i ];
+ }
+ return (SKP_float)( 1.0f / ( 1.0f - lambda * gain ) );
+}
+
+/* Convert warped filter coefficients to monic pseudo-warped coefficients and limit maximum */
+/* amplitude of monic warped coefficients by using bandwidth expansion on the true coefficients */
+SKP_INLINE void warped_true2monic_coefs(
+ SKP_float *coefs_syn,
+ SKP_float *coefs_ana,
+ SKP_float lambda,
+ SKP_float limit,
+ SKP_int order
+) {
+ SKP_int i, iter, ind = 0;
+ SKP_float tmp, maxabs, chirp, gain_syn, gain_ana;
+
+ /* Convert to monic coefficients */
+ for( i = order - 1; i > 0; i-- ) {
+ coefs_syn[ i - 1 ] -= lambda * coefs_syn[ i ];
+ coefs_ana[ i - 1 ] -= lambda * coefs_ana[ i ];
+ }
+ gain_syn = ( 1.0f - lambda * lambda ) / ( 1.0f + lambda * coefs_syn[ 0 ] );
+ gain_ana = ( 1.0f - lambda * lambda ) / ( 1.0f + lambda * coefs_ana[ 0 ] );
+ for( i = 0; i < order; i++ ) {
+ coefs_syn[ i ] *= gain_syn;
+ coefs_ana[ i ] *= gain_ana;
+ }
+
+ /* Limit */
+ for( iter = 0; iter < 10; iter++ ) {
+ /* Find maximum absolute value */
+ maxabs = -1.0f;
+ for( i = 0; i < order; i++ ) {
+ tmp = SKP_max( SKP_abs_float( coefs_syn[ i ] ), SKP_abs_float( coefs_ana[ i ] ) );
+ if( tmp > maxabs ) {
+ maxabs = tmp;
+ ind = i;
+ }
+ }
+ if( maxabs <= limit ) {
+ /* Coefficients are within range - done */
+ return;
+ }
+
+ /* Convert back to true warped coefficients */
+ for( i = 1; i < order; i++ ) {
+ coefs_syn[ i - 1 ] += lambda * coefs_syn[ i ];
+ coefs_ana[ i - 1 ] += lambda * coefs_ana[ i ];
+ }
+ gain_syn = 1.0f / gain_syn;
+ gain_ana = 1.0f / gain_ana;
+ for( i = 0; i < order; i++ ) {
+ coefs_syn[ i ] *= gain_syn;
+ coefs_ana[ i ] *= gain_ana;
+ }
+
+ /* Apply bandwidth expansion */
+ chirp = 0.99f - ( 0.8f + 0.1f * iter ) * ( maxabs - limit ) / ( maxabs * ( ind + 1 ) );
+ SKP_Silk_bwexpander_FLP( coefs_syn, order, chirp );
+ SKP_Silk_bwexpander_FLP( coefs_ana, order, chirp );
+
+ /* Convert to monic warped coefficients */
+ for( i = order - 1; i > 0; i-- ) {
+ coefs_syn[ i - 1 ] -= lambda * coefs_syn[ i ];
+ coefs_ana[ i - 1 ] -= lambda * coefs_ana[ i ];
+ }
+ gain_syn = ( 1.0f - lambda * lambda ) / ( 1.0f + lambda * coefs_syn[ 0 ] );
+ gain_ana = ( 1.0f - lambda * lambda ) / ( 1.0f + lambda * coefs_ana[ 0 ] );
+ for( i = 0; i < order; i++ ) {
+ coefs_syn[ i ] *= gain_syn;
+ coefs_ana[ i ] *= gain_ana;
+ }
+ }
+ SKP_assert( 0 );
+}
+
+/* Compute noise shaping coefficients and initial gain values */
+void SKP_Silk_noise_shape_analysis_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
+ const SKP_float *pitch_res, /* I LPC residual from pitch analysis */
+ const SKP_float *x /* I Input signal [frame_length + la_shape] */
+)
+{
+ SKP_Silk_shape_state_FLP *psShapeSt = &psEnc->sShape;
+ SKP_int k, nSamples;
+ SKP_float SNR_adj_dB, HarmBoost, HarmShapeGain, Tilt;
+ SKP_float nrg, pre_nrg, log_energy, log_energy_prev, energy_variation;
+ SKP_float delta, BWExp1, BWExp2, gain_mult, gain_add, strength, b, warping;
+ SKP_float x_windowed[ SHAPE_LPC_WIN_MAX ];
+ SKP_float auto_corr[ MAX_SHAPE_LPC_ORDER + 1 ];
+ const SKP_float *x_ptr, *pitch_res_ptr;
+
+ /* Point to start of first LPC analysis block */
+ x_ptr = x - psEnc->sCmn.la_shape;
+
+ /****************/
+ /* GAIN CONTROL */
+ /****************/
+ SNR_adj_dB = psEnc->sCmn.SNR_dB_Q7 * ( 1 / 128.0f );
+
+ /* Input quality is the average of the quality in the lowest two VAD bands */
+ psEncCtrl->input_quality = 0.5f * ( psEnc->sCmn.input_quality_bands_Q15[ 0 ] + psEnc->sCmn.input_quality_bands_Q15[ 1 ] ) * ( 1.0f / 32768.0f );
+
+ /* Coding quality level, between 0.0 and 1.0 */
+ psEncCtrl->coding_quality = SKP_sigmoid( 0.25f * ( SNR_adj_dB - 18.0f ) );
+
+ if( psEnc->sCmn.useCBR == 0 ) {
+ /* Reduce coding SNR during low speech activity */
+ b = 1.0f - psEnc->sCmn.speech_activity_Q8 * ( 1.0f / 256.0f );
+ SNR_adj_dB -= BG_SNR_DECR_dB * psEncCtrl->coding_quality * ( 0.5f + 0.5f * psEncCtrl->input_quality ) * b * b;
+ }
+
+ if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
+ /* Reduce gains for periodic signals */
+ SNR_adj_dB += HARM_SNR_INCR_dB * psEnc->LTPCorr;
+ } else {
+ /* For unvoiced signals and low-quality input, adjust the quality slower than SNR_dB setting */
+ SNR_adj_dB += ( -0.4f * psEnc->sCmn.SNR_dB_Q7 * ( 1 / 128.0f ) + 6.0f ) * ( 1.0f - psEncCtrl->input_quality );
+ }
+
+ /*************************/
+ /* SPARSENESS PROCESSING */
+ /*************************/
+ /* Set quantizer offset */
+ if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
+ /* Initally set to 0; may be overruled in process_gains(..) */
+ psEnc->sCmn.indices.quantOffsetType = 0;
+ psEncCtrl->sparseness = 0.0f;
+ } else {
+ /* Sparseness measure, based on relative fluctuations of energy per 2 milliseconds */
+ nSamples = 2 * psEnc->sCmn.fs_kHz;
+ energy_variation = 0.0f;
+ log_energy_prev = 0.0f;
+ pitch_res_ptr = pitch_res;
+ for( k = 0; k < SKP_SMULBB( SUB_FRAME_LENGTH_MS, psEnc->sCmn.nb_subfr ) / 2; k++ ) {
+ nrg = ( SKP_float )nSamples + ( SKP_float )SKP_Silk_energy_FLP( pitch_res_ptr, nSamples );
+ log_energy = SKP_Silk_log2( nrg );
+ if( k > 0 ) {
+ energy_variation += SKP_abs_float( log_energy - log_energy_prev );
+ }
+ log_energy_prev = log_energy;
+ pitch_res_ptr += nSamples;
+ }
+ psEncCtrl->sparseness = SKP_sigmoid( 0.4f * ( energy_variation - 5.0f ) );
+
+ /* Set quantization offset depending on sparseness measure */
+ if( psEncCtrl->sparseness > SPARSENESS_THRESHOLD_QNT_OFFSET ) {
+ psEnc->sCmn.indices.quantOffsetType = 0;
+ } else {
+ psEnc->sCmn.indices.quantOffsetType = 1;
+ }
+
+ /* Increase coding SNR for sparse signals */
+ SNR_adj_dB += SPARSE_SNR_INCR_dB * ( psEncCtrl->sparseness - 0.5f );
+ }
+
+ /*******************************/
+ /* Control bandwidth expansion */
+ /*******************************/
+ /* More BWE for signals with high prediction gain */
+ strength = FIND_PITCH_WHITE_NOISE_FRACTION * psEncCtrl->predGain; /* between 0.0 and 1.0 */
+ BWExp1 = BWExp2 = BANDWIDTH_EXPANSION / ( 1.0f + strength * strength );
+ delta = LOW_RATE_BANDWIDTH_EXPANSION_DELTA * ( 1.0f - 0.75f * psEncCtrl->coding_quality );
+ BWExp1 -= delta;
+ BWExp2 += delta;
+ /* BWExp1 will be applied after BWExp2, so make it relative */
+ BWExp1 /= BWExp2;
+
+ if( psEnc->sCmn.warping_Q16 > 0 ) {
+ /* Slightly more warping in analysis will move quantization noise up in frequency, where it's better masked */
+ warping = (SKP_float)psEnc->sCmn.warping_Q16 / 65536.0f + 0.01f * psEncCtrl->coding_quality;
+ } else {
+ warping = 0.0f;
+ }
+
+ /********************************************/
+ /* Compute noise shaping AR coefs and gains */
+ /********************************************/
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ /* Apply window: sine slope followed by flat part followed by cosine slope */
+ SKP_int shift, slope_part, flat_part;
+ flat_part = psEnc->sCmn.fs_kHz * 3;
+ slope_part = ( psEnc->sCmn.shapeWinLength - flat_part ) / 2;
+
+ SKP_Silk_apply_sine_window_FLP( x_windowed, x_ptr, 1, slope_part );
+ shift = slope_part;
+ SKP_memcpy( x_windowed + shift, x_ptr + shift, flat_part * sizeof(SKP_float) );
+ shift += flat_part;
+ SKP_Silk_apply_sine_window_FLP( x_windowed + shift, x_ptr + shift, 2, slope_part );
+
+ /* Update pointer: next LPC analysis block */
+ x_ptr += psEnc->sCmn.subfr_length;
+
+ if( psEnc->sCmn.warping_Q16 > 0 ) {
+ /* Calculate warped auto correlation */
+ SKP_Silk_warped_autocorrelation_FLP( auto_corr, x_windowed, warping,
+ psEnc->sCmn.shapeWinLength, psEnc->sCmn.shapingLPCOrder );
+ } else {
+ /* Calculate regular auto correlation */
+ SKP_Silk_autocorrelation_FLP( auto_corr, x_windowed, psEnc->sCmn.shapeWinLength, psEnc->sCmn.shapingLPCOrder + 1 );
+ }
+
+ /* Add white noise, as a fraction of energy */
+ auto_corr[ 0 ] += auto_corr[ 0 ] * SHAPE_WHITE_NOISE_FRACTION;
+
+ /* Convert correlations to prediction coefficients, and compute residual energy */
+ nrg = SKP_Silk_levinsondurbin_FLP( &psEncCtrl->AR2[ k * MAX_SHAPE_LPC_ORDER ], auto_corr, psEnc->sCmn.shapingLPCOrder );
+ psEncCtrl->Gains[ k ] = ( SKP_float )sqrt( nrg );
+
+ if( psEnc->sCmn.warping_Q16 > 0 ) {
+ /* Adjust gain for warping */
+ psEncCtrl->Gains[ k ] *= warped_gain( &psEncCtrl->AR2[ k * MAX_SHAPE_LPC_ORDER ], warping, psEnc->sCmn.shapingLPCOrder );
+ }
+
+ /* Bandwidth expansion for synthesis filter shaping */
+ SKP_Silk_bwexpander_FLP( &psEncCtrl->AR2[ k * MAX_SHAPE_LPC_ORDER ], psEnc->sCmn.shapingLPCOrder, BWExp2 );
+
+ /* Compute noise shaping filter coefficients */
+ SKP_memcpy(
+ &psEncCtrl->AR1[ k * MAX_SHAPE_LPC_ORDER ],
+ &psEncCtrl->AR2[ k * MAX_SHAPE_LPC_ORDER ],
+ psEnc->sCmn.shapingLPCOrder * sizeof( SKP_float ) );
+
+ /* Bandwidth expansion for analysis filter shaping */
+ SKP_Silk_bwexpander_FLP( &psEncCtrl->AR1[ k * MAX_SHAPE_LPC_ORDER ], psEnc->sCmn.shapingLPCOrder, BWExp1 );
+
+ /* Ratio of prediction gains, in energy domain */
+ SKP_Silk_LPC_inverse_pred_gain_FLP( &pre_nrg, &psEncCtrl->AR2[ k * MAX_SHAPE_LPC_ORDER ], psEnc->sCmn.shapingLPCOrder );
+ SKP_Silk_LPC_inverse_pred_gain_FLP( &nrg, &psEncCtrl->AR1[ k * MAX_SHAPE_LPC_ORDER ], psEnc->sCmn.shapingLPCOrder );
+ psEncCtrl->GainsPre[ k ] = 1.0f - 0.7f * ( 1.0f - pre_nrg / nrg );
+
+ /* Convert to monic warped prediction coefficients and limit absolute values */
+ warped_true2monic_coefs( &psEncCtrl->AR2[ k * MAX_SHAPE_LPC_ORDER ], &psEncCtrl->AR1[ k * MAX_SHAPE_LPC_ORDER ],
+ warping, 3.999f, psEnc->sCmn.shapingLPCOrder );
+ }
+
+ /*****************/
+ /* Gain tweaking */
+ /*****************/
+ /* Increase gains during low speech activity */
+ gain_mult = (SKP_float)pow( 2.0f, -0.16f * SNR_adj_dB );
+ gain_add = (SKP_float)pow( 2.0f, 0.16f * MIN_QGAIN_DB );
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ psEncCtrl->Gains[ k ] *= gain_mult;
+ psEncCtrl->Gains[ k ] += gain_add;
+ }
+
+ gain_mult = 1.0f + INPUT_TILT + psEncCtrl->coding_quality * HIGH_RATE_INPUT_TILT;
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ psEncCtrl->GainsPre[ k ] *= gain_mult;
+ }
+
+ /************************************************/
+ /* Control low-frequency shaping and noise tilt */
+ /************************************************/
+ /* Less low frequency shaping for noisy inputs */
+ strength = LOW_FREQ_SHAPING * ( 1.0f + LOW_QUALITY_LOW_FREQ_SHAPING_DECR * ( psEnc->sCmn.input_quality_bands_Q15[ 0 ] * ( 1.0f / 32768.0f ) - 1.0f ) );
+ strength *= psEnc->sCmn.speech_activity_Q8 * ( 1.0f / 256.0f );
+ if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
+ /* Reduce low frequencies quantization noise for periodic signals, depending on pitch lag */
+ /*f = 400; freqz([1, -0.98 + 2e-4 * f], [1, -0.97 + 7e-4 * f], 2^12, Fs); axis([0, 1000, -10, 1])*/
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ b = 0.2f / psEnc->sCmn.fs_kHz + 3.0f / psEncCtrl->pitchL[ k ];
+ psEncCtrl->LF_MA_shp[ k ] = -1.0f + b;
+ psEncCtrl->LF_AR_shp[ k ] = 1.0f - b - b * strength;
+ }
+ Tilt = - HP_NOISE_COEF -
+ (1 - HP_NOISE_COEF) * HARM_HP_NOISE_COEF * psEnc->sCmn.speech_activity_Q8 * ( 1.0f / 256.0f );
+ } else {
+ b = 1.3f / psEnc->sCmn.fs_kHz;
+ psEncCtrl->LF_MA_shp[ 0 ] = -1.0f + b;
+ psEncCtrl->LF_AR_shp[ 0 ] = 1.0f - b - b * strength * 0.6f;
+ for( k = 1; k < psEnc->sCmn.nb_subfr; k++ ) {
+ psEncCtrl->LF_MA_shp[ k ] = psEncCtrl->LF_MA_shp[ 0 ];
+ psEncCtrl->LF_AR_shp[ k ] = psEncCtrl->LF_AR_shp[ 0 ];
+ }
+ Tilt = -HP_NOISE_COEF;
+ }
+
+ /****************************/
+ /* HARMONIC SHAPING CONTROL */
+ /****************************/
+ /* Control boosting of harmonic frequencies */
+ HarmBoost = LOW_RATE_HARMONIC_BOOST * ( 1.0f - psEncCtrl->coding_quality ) * psEnc->LTPCorr;
+
+ /* More harmonic boost for noisy input signals */
+ HarmBoost += LOW_INPUT_QUALITY_HARMONIC_BOOST * ( 1.0f - psEncCtrl->input_quality );
+
+ if( USE_HARM_SHAPING && psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
+ /* Harmonic noise shaping */
+ HarmShapeGain = HARMONIC_SHAPING;
+
+ /* More harmonic noise shaping for high bitrates or noisy input */
+ HarmShapeGain += HIGH_RATE_OR_LOW_QUALITY_HARMONIC_SHAPING *
+ ( 1.0f - ( 1.0f - psEncCtrl->coding_quality ) * psEncCtrl->input_quality );
+
+ /* Less harmonic noise shaping for less periodic signals */
+ HarmShapeGain *= ( SKP_float )sqrt( psEnc->LTPCorr );
+ } else {
+ HarmShapeGain = 0.0f;
+ }
+
+ /*************************/
+ /* Smooth over subframes */
+ /*************************/
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ psShapeSt->HarmBoost_smth += SUBFR_SMTH_COEF * ( HarmBoost - psShapeSt->HarmBoost_smth );
+ psEncCtrl->HarmBoost[ k ] = psShapeSt->HarmBoost_smth;
+ psShapeSt->HarmShapeGain_smth += SUBFR_SMTH_COEF * ( HarmShapeGain - psShapeSt->HarmShapeGain_smth );
+ psEncCtrl->HarmShapeGain[ k ] = psShapeSt->HarmShapeGain_smth;
+ psShapeSt->Tilt_smth += SUBFR_SMTH_COEF * ( Tilt - psShapeSt->Tilt_smth );
+ psEncCtrl->Tilt[ k ] = psShapeSt->Tilt_smth;
+ }
+}
--- /dev/null
+++ b/src_FLP/SKP_Silk_prefilter_FLP.c
@@ -1,0 +1,202 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FLP.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+/*
+* SKP_Silk_prefilter. Prefilter for finding Quantizer input signal
+*/
+SKP_INLINE void SKP_Silk_prefilt_FLP(
+ SKP_Silk_prefilter_state_FLP *P,/* I/O state */
+ SKP_float st_res[], /* I */
+ SKP_float xw[], /* O */
+ SKP_float *HarmShapeFIR, /* I */
+ SKP_float Tilt, /* I */
+ SKP_float LF_MA_shp, /* I */
+ SKP_float LF_AR_shp, /* I */
+ SKP_int lag, /* I */
+ SKP_int length /* I */
+);
+
+void SKP_Silk_warped_LPC_analysis_filter_FLP(
+ SKP_float state[], /* I/O State [order + 1] */
+ SKP_float res[], /* O Residual signal [length] */
+ const SKP_float coef[], /* I Coefficients [order] */
+ const SKP_float input[], /* I Input signal [length] */
+ const SKP_float lambda, /* I Warping factor */
+ const SKP_int length, /* I Length of input signal */
+ const SKP_int order /* I Filter order (even) */
+)
+{
+ SKP_int n, i;
+ SKP_float acc, tmp1, tmp2;
+
+ /* Order must be even */
+ SKP_assert( ( order & 1 ) == 0 );
+
+ for( n = 0; n < length; n++ ) {
+ /* Output of lowpass section */
+ tmp2 = state[ 0 ] + lambda * state[ 1 ];
+ state[ 0 ] = input[ n ];
+ /* Output of allpass section */
+ tmp1 = state[ 1 ] + lambda * ( state[ 2 ] - tmp2 );
+ state[ 1 ] = tmp2;
+ acc = coef[ 0 ] * tmp2;
+ /* Loop over allpass sections */
+ for( i = 2; i < order; i += 2 ) {
+ /* Output of allpass section */
+ tmp2 = state[ i ] + lambda * ( state[ i + 1 ] - tmp1 );
+ state[ i ] = tmp1;
+ acc += coef[ i - 1 ] * tmp1;
+ /* Output of allpass section */
+ tmp1 = state[ i + 1 ] + lambda * ( state[ i + 2 ] - tmp2 );
+ state[ i + 1 ] = tmp2;
+ acc += coef[ i ] * tmp2;
+ }
+ state[ order ] = tmp1;
+ acc += coef[ order - 1 ] * tmp1;
+ res[ n ] = input[ n ] - acc;
+ }
+}
+
+/*
+* SKP_Silk_prefilter. Main prefilter function
+*/
+void SKP_Silk_prefilter_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ const SKP_Silk_encoder_control_FLP *psEncCtrl, /* I Encoder control FLP */
+ SKP_float xw[], /* O Weighted signal */
+ const SKP_float x[] /* I Speech signal */
+)
+{
+ SKP_Silk_prefilter_state_FLP *P = &psEnc->sPrefilt;
+ SKP_int j, k, lag;
+ SKP_float HarmShapeGain, Tilt, LF_MA_shp, LF_AR_shp;
+ SKP_float B[ 2 ];
+ const SKP_float *AR1_shp;
+ const SKP_float *px;
+ SKP_float *pxw;
+ SKP_float HarmShapeFIR[ 3 ];
+ SKP_float st_res[ MAX_SUB_FRAME_LENGTH + MAX_LPC_ORDER ];
+
+ /* Setup pointers */
+ px = x;
+ pxw = xw;
+ lag = P->lagPrev;
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ /* Update Variables that change per sub frame */
+ if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
+ lag = psEncCtrl->pitchL[ k ];
+ }
+
+ /* Noise shape parameters */
+ HarmShapeGain = psEncCtrl->HarmShapeGain[ k ] * ( 1.0f - psEncCtrl->HarmBoost[ k ] );
+ HarmShapeFIR[ 0 ] = 0.25f * HarmShapeGain;
+ HarmShapeFIR[ 1 ] = 32767.0f / 65536.0f * HarmShapeGain;
+ HarmShapeFIR[ 2 ] = 0.25f * HarmShapeGain;
+ Tilt = psEncCtrl->Tilt[ k ];
+ LF_MA_shp = psEncCtrl->LF_MA_shp[ k ];
+ LF_AR_shp = psEncCtrl->LF_AR_shp[ k ];
+ AR1_shp = &psEncCtrl->AR1[ k * MAX_SHAPE_LPC_ORDER ];
+
+ /* Short term FIR filtering */
+ SKP_Silk_warped_LPC_analysis_filter_FLP( P->sAR_shp, st_res, AR1_shp, px,
+ (SKP_float)psEnc->sCmn.warping_Q16 / 65536.0f, psEnc->sCmn.subfr_length, psEnc->sCmn.shapingLPCOrder );
+
+ /* Reduce (mainly) low frequencies during harmonic emphasis */
+ B[ 0 ] = psEncCtrl->GainsPre[ k ];
+ B[ 1 ] = -psEncCtrl->GainsPre[ k ] *
+ ( psEncCtrl->HarmBoost[ k ] * HarmShapeGain + INPUT_TILT + psEncCtrl->coding_quality * HIGH_RATE_INPUT_TILT );
+ pxw[ 0 ] = B[ 0 ] * st_res[ 0 ] + B[ 1 ] * P->sHarmHP;
+ for( j = 1; j < psEnc->sCmn.subfr_length; j++ ) {
+ pxw[ j ] = B[ 0 ] * st_res[ j ] + B[ 1 ] * st_res[ j - 1 ];
+ }
+ P->sHarmHP = st_res[ psEnc->sCmn.subfr_length - 1 ];
+
+ SKP_Silk_prefilt_FLP( P, pxw, pxw, HarmShapeFIR, Tilt, LF_MA_shp, LF_AR_shp, lag, psEnc->sCmn.subfr_length );
+
+ px += psEnc->sCmn.subfr_length;
+ pxw += psEnc->sCmn.subfr_length;
+ }
+ P->lagPrev = psEncCtrl->pitchL[ psEnc->sCmn.nb_subfr - 1 ];
+}
+
+/*
+* Prefilter for finding Quantizer input signal
+*/
+SKP_INLINE void SKP_Silk_prefilt_FLP(
+ SKP_Silk_prefilter_state_FLP *P,/* I/O state */
+ SKP_float st_res[], /* I */
+ SKP_float xw[], /* O */
+ SKP_float *HarmShapeFIR, /* I */
+ SKP_float Tilt, /* I */
+ SKP_float LF_MA_shp, /* I */
+ SKP_float LF_AR_shp, /* I */
+ SKP_int lag, /* I */
+ SKP_int length /* I */
+)
+{
+ SKP_int i;
+ SKP_int idx, LTP_shp_buf_idx;
+ SKP_float n_Tilt, n_LF, n_LTP;
+ SKP_float sLF_AR_shp, sLF_MA_shp;
+ SKP_float *LTP_shp_buf;
+
+ /* To speed up use temp variables instead of using the struct */
+ LTP_shp_buf = P->sLTP_shp;
+ LTP_shp_buf_idx = P->sLTP_shp_buf_idx;
+ sLF_AR_shp = P->sLF_AR_shp;
+ sLF_MA_shp = P->sLF_MA_shp;
+
+ for( i = 0; i < length; i++ ) {
+ if( lag > 0 ) {
+ SKP_assert( HARM_SHAPE_FIR_TAPS == 3 );
+ idx = lag + LTP_shp_buf_idx;
+ n_LTP = LTP_shp_buf[ ( idx - HARM_SHAPE_FIR_TAPS / 2 - 1) & LTP_MASK ] * HarmShapeFIR[ 0 ];
+ n_LTP += LTP_shp_buf[ ( idx - HARM_SHAPE_FIR_TAPS / 2 ) & LTP_MASK ] * HarmShapeFIR[ 1 ];
+ n_LTP += LTP_shp_buf[ ( idx - HARM_SHAPE_FIR_TAPS / 2 + 1) & LTP_MASK ] * HarmShapeFIR[ 2 ];
+ } else {
+ n_LTP = 0;
+ }
+
+ n_Tilt = sLF_AR_shp * Tilt;
+ n_LF = sLF_AR_shp * LF_AR_shp + sLF_MA_shp * LF_MA_shp;
+
+ sLF_AR_shp = st_res[ i ] - n_Tilt;
+ sLF_MA_shp = sLF_AR_shp - n_LF;
+
+ LTP_shp_buf_idx = ( LTP_shp_buf_idx - 1 ) & LTP_MASK;
+ LTP_shp_buf[ LTP_shp_buf_idx ] = sLF_MA_shp;
+
+ xw[ i ] = sLF_MA_shp - n_LTP;
+ }
+ /* Copy temp variable back to state */
+ P->sLF_AR_shp = sLF_AR_shp;
+ P->sLF_MA_shp = sLF_MA_shp;
+ P->sLTP_shp_buf_idx = LTP_shp_buf_idx;
+}
--- /dev/null
+++ b/src_FLP/SKP_Silk_process_gains_FLP.c
@@ -1,0 +1,94 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FLP.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+/* Processing of gains */
+void SKP_Silk_process_gains_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ SKP_Silk_encoder_control_FLP *psEncCtrl /* I/O Encoder control FLP */
+)
+{
+ SKP_Silk_shape_state_FLP *psShapeSt = &psEnc->sShape;
+ SKP_int k;
+ SKP_int32 pGains_Q16[ MAX_NB_SUBFR ];
+ SKP_float s, InvMaxSqrVal, gain, quant_offset;
+
+ /* Gain reduction when LTP coding gain is high */
+ if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
+ s = 1.0f - 0.5f * SKP_sigmoid( 0.25f * ( psEncCtrl->LTPredCodGain - 12.0f ) );
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ psEncCtrl->Gains[ k ] *= s;
+ }
+ }
+
+ /* Limit the quantized signal */
+ InvMaxSqrVal = ( SKP_float )( pow( 2.0f, 0.33f * ( 21.0f - psEnc->sCmn.SNR_dB_Q7 * ( 1 / 128.0f ) ) ) / psEnc->sCmn.subfr_length );
+
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ /* Soft limit on ratio residual energy and squared gains */
+ gain = psEncCtrl->Gains[ k ];
+ gain = ( SKP_float )sqrt( gain * gain + psEncCtrl->ResNrg[ k ] * InvMaxSqrVal );
+ psEncCtrl->Gains[ k ] = SKP_min_float( gain, 32767.0f );
+ }
+
+ /* Prepare gains for noise shaping quantization */
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ pGains_Q16[ k ] = ( SKP_int32 ) ( psEncCtrl->Gains[ k ] * 65536.0f );
+ }
+
+ /* Noise shaping quantization */
+ SKP_Silk_gains_quant( psEnc->sCmn.indices.GainsIndices, pGains_Q16,
+ &psShapeSt->LastGainIndex, psEnc->sCmn.nFramesAnalyzed, psEnc->sCmn.nb_subfr );
+
+ /* Overwrite unquantized gains with quantized gains and convert back to Q0 from Q16 */
+ for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
+ psEncCtrl->Gains[ k ] = pGains_Q16[ k ] / 65536.0f;
+ }
+
+ /* Set quantizer offset for voiced signals. Larger offset when LTP coding gain is low or tilt is high (ie low-pass) */
+ if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
+ if( psEncCtrl->LTPredCodGain + psEnc->sCmn.input_tilt_Q15 * ( 1.0f / 32768.0f ) > 1.0f ) {
+ psEnc->sCmn.indices.quantOffsetType = 0;
+ } else {
+ psEnc->sCmn.indices.quantOffsetType = 1;
+ }
+ }
+
+ /* Quantizer boundary adjustment */
+ quant_offset = SKP_Silk_Quantization_Offsets_Q10[ psEnc->sCmn.indices.signalType >> 1 ][ psEnc->sCmn.indices.quantOffsetType ] / 1024.0f;
+ psEncCtrl->Lambda = LAMBDA_OFFSET
+ + LAMBDA_DELAYED_DECISIONS * psEnc->sCmn.nStatesDelayedDecision
+ + LAMBDA_SPEECH_ACT * psEnc->sCmn.speech_activity_Q8 * ( 1.0f / 256.0f )
+ + LAMBDA_INPUT_QUALITY * psEncCtrl->input_quality
+ + LAMBDA_CODING_QUALITY * psEncCtrl->coding_quality
+ + LAMBDA_QUANT_OFFSET * quant_offset;
+
+ SKP_assert( psEncCtrl->Lambda > 0.0f );
+ SKP_assert( psEncCtrl->Lambda < 2.0f );
+}
--- /dev/null
+++ b/src_FLP/SKP_Silk_regularize_correlations_FLP.c
@@ -1,0 +1,43 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FLP.h"
+
+void SKP_Silk_regularize_correlations_FLP(
+ SKP_float *XX, /* I/O Correlation matrices */
+ SKP_float *xx, /* I/O Correlation values */
+ const SKP_float noise, /* I Noise energy to add */
+ const SKP_int D /* I Dimension of XX */
+)
+{
+ SKP_int i;
+
+ for( i = 0; i < D; i++ ) {
+ matrix_ptr( &XX[ 0 ], i, i, D ) += noise;
+ }
+ xx[ 0 ] += noise;
+}
--- /dev/null
+++ b/src_FLP/SKP_Silk_residual_energy_FLP.c
@@ -1,0 +1,113 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FLP.h"
+
+#define MAX_ITERATIONS_RESIDUAL_NRG 10
+#define REGULARIZATION_FACTOR 1e-8f
+
+/* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */
+SKP_float SKP_Silk_residual_energy_covar_FLP( /* O Weighted residual energy */
+ const SKP_float *c, /* I Filter coefficients */
+ SKP_float *wXX, /* I/O Weighted correlation matrix, reg. out */
+ const SKP_float *wXx, /* I Weighted correlation vector */
+ const SKP_float wxx, /* I Weighted correlation value */
+ const SKP_int D /* I Dimension */
+)
+{
+ SKP_int i, j, k;
+ SKP_float tmp, nrg, regularization;
+
+ /* Safety checks */
+ SKP_assert( D >= 0 );
+
+ regularization = REGULARIZATION_FACTOR * ( wXX[ 0 ] + wXX[ D * D - 1 ] );
+ for( k = 0; k < MAX_ITERATIONS_RESIDUAL_NRG; k++ ) {
+ nrg = wxx;
+
+ tmp = 0.0f;
+ for( i = 0; i < D; i++ ) {
+ tmp += wXx[ i ] * c[ i ];
+ }
+ nrg -= 2.0f * tmp;
+
+ /* compute c' * wXX * c, assuming wXX is symmetric */
+ for( i = 0; i < D; i++ ) {
+ tmp = 0.0f;
+ for( j = i + 1; j < D; j++ ) {
+ tmp += matrix_c_ptr( wXX, i, j, D ) * c[ j ];
+ }
+ nrg += c[ i ] * ( 2.0f * tmp + matrix_c_ptr( wXX, i, i, D ) * c[ i ] );
+ }
+ if( nrg > 0 ) {
+ break;
+ } else {
+ /* Add white noise */
+ for( i = 0; i < D; i++ ) {
+ matrix_c_ptr( wXX, i, i, D ) += regularization;
+ }
+ /* Increase noise for next run */
+ regularization *= 2.0f;
+ }
+ }
+ if( k == MAX_ITERATIONS_RESIDUAL_NRG ) {
+ SKP_assert( nrg == 0 );
+ nrg = 1.0f;
+ }
+
+ return nrg;
+}
+
+/* Calculates residual energies of input subframes where all subframes have LPC_order */
+/* of preceeding samples */
+void SKP_Silk_residual_energy_FLP(
+ SKP_float nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */
+ const SKP_float x[], /* I Input signal */
+ const SKP_float a[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */
+ const SKP_float gains[], /* I Quantization gains */
+ const SKP_int subfr_length, /* I Subframe length */
+ const SKP_int nb_subfr, /* I number of subframes */
+ const SKP_int LPC_order /* I LPC order */
+)
+{
+ SKP_int shift;
+ SKP_float *LPC_res_ptr, LPC_res[ ( MAX_FRAME_LENGTH + MAX_NB_SUBFR * MAX_LPC_ORDER ) / 2 ];
+
+ LPC_res_ptr = LPC_res + LPC_order;
+ shift = LPC_order + subfr_length;
+
+ /* Filter input to create the LPC residual for each frame half, and measure subframe energies */
+ SKP_Silk_LPC_analysis_filter_FLP( LPC_res, a[ 0 ], x + 0 * shift, 2 * shift, LPC_order );
+ nrgs[ 0 ] = ( SKP_float )( gains[ 0 ] * gains[ 0 ] * SKP_Silk_energy_FLP( LPC_res_ptr + 0 * shift, subfr_length ) );
+ nrgs[ 1 ] = ( SKP_float )( gains[ 1 ] * gains[ 1 ] * SKP_Silk_energy_FLP( LPC_res_ptr + 1 * shift, subfr_length ) );
+
+ if( nb_subfr == MAX_NB_SUBFR ) {
+ SKP_Silk_LPC_analysis_filter_FLP( LPC_res, a[ 1 ], x + 2 * shift, 2 * shift, LPC_order );
+ nrgs[ 2 ] = ( SKP_float )( gains[ 2 ] * gains[ 2 ] * SKP_Silk_energy_FLP( LPC_res_ptr + 0 * shift, subfr_length ) );
+ nrgs[ 3 ] = ( SKP_float )( gains[ 3 ] * gains[ 3 ] * SKP_Silk_energy_FLP( LPC_res_ptr + 1 * shift, subfr_length ) );
+ }
+}
--- /dev/null
+++ b/src_FLP/SKP_Silk_solve_LS_FLP.c
@@ -1,0 +1,203 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FLP.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+/**********************************************************************
+ * LDL Factorisation. Finds the upper triangular matrix L and the diagonal
+ * Matrix D (only the diagonal elements returned in a vector)such that
+ * the symmetric matric A is given by A = L*D*L'.
+ **********************************************************************/
+void SKP_Silk_LDL_FLP(
+ SKP_float *A, /* (I/O) Pointer to Symetric Square Matrix */
+ SKP_int M, /* (I) Size of Matrix */
+ SKP_float *L, /* (I/O) Pointer to Square Upper triangular Matrix */
+ SKP_float *Dinv /* (I/O) Pointer to vector holding the inverse diagonal elements of D */
+);
+
+/**********************************************************************
+ * Function to solve linear equation Ax = b, when A is a MxM lower
+ * triangular matrix, with ones on the diagonal.
+ **********************************************************************/
+void SKP_Silk_SolveWithLowerTriangularWdiagOnes_FLP(
+ const SKP_float *L, /* (I) Pointer to Lower Triangular Matrix */
+ SKP_int M, /* (I) Dim of Matrix equation */
+ const SKP_float *b, /* (I) b Vector */
+ SKP_float *x /* (O) x Vector */
+);
+
+/**********************************************************************
+ * Function to solve linear equation (A^T)x = b, when A is a MxM lower
+ * triangular, with ones on the diagonal. (ie then A^T is upper triangular)
+ **********************************************************************/
+void SKP_Silk_SolveWithUpperTriangularFromLowerWdiagOnes_FLP(
+ const SKP_float *L, /* (I) Pointer to Lower Triangular Matrix */
+ SKP_int M, /* (I) Dim of Matrix equation */
+ const SKP_float *b, /* (I) b Vector */
+ SKP_float *x /* (O) x Vector */
+);
+
+/**********************************************************************
+ * Function to solve linear equation Ax = b, when A is a MxM
+ * symmetric square matrix - using LDL factorisation
+ **********************************************************************/
+void SKP_Silk_solve_LDL_FLP(
+ SKP_float *A, /* I/O Symmetric square matrix, out: reg. */
+ const SKP_int M, /* I Size of matrix */
+ const SKP_float *b, /* I Pointer to b vector */
+ SKP_float *x /* O Pointer to x solution vector */
+)
+{
+ SKP_int i;
+ SKP_float L[ MAX_MATRIX_SIZE ][ MAX_MATRIX_SIZE ];
+ SKP_float T[ MAX_MATRIX_SIZE ];
+ SKP_float Dinv[ MAX_MATRIX_SIZE ]; // inverse diagonal elements of D
+
+ SKP_assert( M <= MAX_MATRIX_SIZE );
+
+ /***************************************************
+ Factorize A by LDL such that A = L*D*(L^T),
+ where L is lower triangular with ones on diagonal
+ ****************************************************/
+ SKP_Silk_LDL_FLP( A, M, &L[ 0 ][ 0 ], Dinv );
+
+ /****************************************************
+ * substitute D*(L^T) = T. ie:
+ L*D*(L^T)*x = b => L*T = b <=> T = inv(L)*b
+ ******************************************************/
+ SKP_Silk_SolveWithLowerTriangularWdiagOnes_FLP( &L[ 0 ][ 0 ], M, b, T );
+
+ /****************************************************
+ D*(L^T)*x = T <=> (L^T)*x = inv(D)*T, because D is
+ diagonal just multiply with 1/d_i
+ ****************************************************/
+ for( i = 0; i < M; i++ ) {
+ T[ i ] = T[ i ] * Dinv[ i ];
+ }
+ /****************************************************
+ x = inv(L') * inv(D) * T
+ *****************************************************/
+ SKP_Silk_SolveWithUpperTriangularFromLowerWdiagOnes_FLP( &L[ 0 ][ 0 ], M, T, x );
+}
+
+void SKP_Silk_SolveWithUpperTriangularFromLowerWdiagOnes_FLP(
+ const SKP_float *L, /* (I) Pointer to Lower Triangular Matrix */
+ SKP_int M, /* (I) Dim of Matrix equation */
+ const SKP_float *b, /* (I) b Vector */
+ SKP_float *x /* (O) x Vector */
+)
+{
+ SKP_int i, j;
+ SKP_float temp;
+ const SKP_float *ptr1;
+
+ for( i = M - 1; i >= 0; i-- ) {
+ ptr1 = matrix_adr( L, 0, i, M );
+ temp = 0;
+ for( j = M - 1; j > i ; j-- ) {
+ temp += ptr1[ j * M ] * x[ j ];
+ }
+ temp = b[ i ] - temp;
+ x[ i ] = temp;
+ }
+}
+
+void SKP_Silk_SolveWithLowerTriangularWdiagOnes_FLP(
+ const SKP_float *L, /* (I) Pointer to Lower Triangular Matrix */
+ SKP_int M, /* (I) Dim of Matrix equation */
+ const SKP_float *b, /* (I) b Vector */
+ SKP_float *x /* (O) x Vector */
+)
+{
+ SKP_int i, j;
+ SKP_float temp;
+ const SKP_float *ptr1;
+
+ for( i = 0; i < M; i++ ) {
+ ptr1 = matrix_adr( L, i, 0, M );
+ temp = 0;
+ for( j = 0; j < i; j++ ) {
+ temp += ptr1[ j ] * x[ j ];
+ }
+ temp = b[ i ] - temp;
+ x[ i ] = temp;
+ }
+}
+
+void SKP_Silk_LDL_FLP(
+ SKP_float *A, /* (I/O) Pointer to Symetric Square Matrix */
+ SKP_int M, /* (I) Size of Matrix */
+ SKP_float *L, /* (I/O) Pointer to Square Upper triangular Matrix */
+ SKP_float *Dinv /* (I/O) Pointer to vector holding the inverse diagonal elements of D */
+)
+{
+ SKP_int i, j, k, loop_count, err = 1;
+ SKP_float *ptr1, *ptr2;
+ double temp, diag_min_value;
+ SKP_float v[ MAX_MATRIX_SIZE ], D[ MAX_MATRIX_SIZE ]; // temp arrays
+
+ SKP_assert( M <= MAX_MATRIX_SIZE );
+
+ diag_min_value = FIND_LTP_COND_FAC * 0.5f * ( A[ 0 ] + A[ M * M - 1 ] );
+ for( loop_count = 0; loop_count < M && err == 1; loop_count++ ) {
+ err = 0;
+ for( j = 0; j < M; j++ ) {
+ ptr1 = matrix_adr( L, j, 0, M );
+ temp = matrix_ptr( A, j, j, M ); // element in row j column j
+ for( i = 0; i < j; i++ ) {
+ v[ i ] = ptr1[ i ] * D[ i ];
+ temp -= ptr1[ i ] * v[ i ];
+ }
+ if( temp < diag_min_value ) {
+ /* Badly conditioned matrix: add white noise and run again */
+ temp = ( loop_count + 1 ) * diag_min_value - temp;
+ for( i = 0; i < M; i++ ) {
+ matrix_ptr( A, i, i, M ) += ( SKP_float )temp;
+ }
+ err = 1;
+ break;
+ }
+ D[ j ] = ( SKP_float )temp;
+ Dinv[ j ] = ( SKP_float )( 1.0f / temp );
+ matrix_ptr( L, j, j, M ) = 1.0f;
+
+ ptr1 = matrix_adr( A, j, 0, M );
+ ptr2 = matrix_adr( L, j + 1, 0, M);
+ for( i = j + 1; i < M; i++ ) {
+ temp = 0.0;
+ for( k = 0; k < j; k++ ) {
+ temp += ptr2[ k ] * v[ k ];
+ }
+ matrix_ptr( L, i, j, M ) = ( SKP_float )( ( ptr1[ i ] - temp ) * Dinv[ j ] );
+ ptr2 += M; // go to next column
+ }
+ }
+ }
+ SKP_assert( err == 0 );
+}
+
--- /dev/null
+++ b/src_FLP/SKP_Silk_structs_FLP.h
@@ -1,0 +1,116 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef SKP_SILK_STRUCTS_FLP_H
+#define SKP_SILK_STRUCTS_FLP_H
+
+#include "SKP_Silk_typedef.h"
+#include "SKP_Silk_main.h"
+#include "SKP_Silk_structs.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/********************************/
+/* Noise shaping analysis state */
+/********************************/
+typedef struct {
+ SKP_int8 LastGainIndex;
+ SKP_float HarmBoost_smth;
+ SKP_float HarmShapeGain_smth;
+ SKP_float Tilt_smth;
+} SKP_Silk_shape_state_FLP;
+
+/********************************/
+/* Prefilter state */
+/********************************/
+typedef struct {
+ SKP_float sLTP_shp[ LTP_BUF_LENGTH ];
+ SKP_float sAR_shp[ MAX_SHAPE_LPC_ORDER + 1 ];
+ SKP_int sLTP_shp_buf_idx;
+ SKP_float sLF_AR_shp;
+ SKP_float sLF_MA_shp;
+ SKP_float sHarmHP;
+ SKP_int32 rand_seed;
+ SKP_int lagPrev;
+} SKP_Silk_prefilter_state_FLP;
+
+/********************************/
+/* Encoder state FLP */
+/********************************/
+typedef struct {
+ SKP_Silk_encoder_state sCmn; /* Common struct, shared with fixed-point code */
+ SKP_Silk_shape_state_FLP sShape; /* Noise shaping state */
+ SKP_Silk_prefilter_state_FLP sPrefilt; /* Prefilter State */
+
+ /* Buffer for find pitch and noise shape analysis */
+ SKP_float x_buf[ 2 * MAX_FRAME_LENGTH + LA_SHAPE_MAX ];/* Buffer for find pitch and noise shape analysis */
+ SKP_float LTPCorr; /* Normalized correlation from pitch lag estimator */
+
+ /* Parameters for LTP scaling control */
+ SKP_float prevLTPredCodGain;
+ SKP_float HPLTPredCodGain;
+} SKP_Silk_encoder_state_FLP;
+
+/************************/
+/* Encoder control FLP */
+/************************/
+typedef struct {
+ /* Prediction and coding parameters */
+ SKP_float Gains[MAX_NB_SUBFR];
+ SKP_float PredCoef[ 2 ][ MAX_LPC_ORDER ]; /* holds interpolated and final coefficients */
+ SKP_float LTPCoef[LTP_ORDER * MAX_NB_SUBFR];
+ SKP_float LTP_scale;
+ SKP_int pitchL[ MAX_NB_SUBFR ];
+
+ /* Noise shaping parameters */
+ SKP_float AR1[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ];
+ SKP_float AR2[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ];
+ SKP_float LF_MA_shp[ MAX_NB_SUBFR ];
+ SKP_float LF_AR_shp[ MAX_NB_SUBFR ];
+ SKP_float GainsPre[ MAX_NB_SUBFR ];
+ SKP_float HarmBoost[ MAX_NB_SUBFR ];
+ SKP_float Tilt[ MAX_NB_SUBFR ];
+ SKP_float HarmShapeGain[ MAX_NB_SUBFR ];
+ SKP_float Lambda;
+ SKP_float input_quality;
+ SKP_float coding_quality;
+
+ /* Measures */
+ SKP_float sparseness;
+ SKP_float predGain;
+ SKP_float LTPredCodGain;
+ SKP_float ResNrg[ MAX_NB_SUBFR ]; /* Residual energy per subframe */
+} SKP_Silk_encoder_control_FLP;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+++ b/src_FLP/SKP_Silk_warped_autocorrelation_FLP.c
@@ -1,0 +1,69 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FLP.h"
+
+/* Autocorrelations for a warped frequency axis */
+void SKP_Silk_warped_autocorrelation_FLP(
+ SKP_float *corr, /* O Result [order + 1] */
+ const SKP_float *input, /* I Input data to correlate */
+ const SKP_float warping, /* I Warping coefficient */
+ const SKP_int length, /* I Length of input */
+ const SKP_int order /* I Correlation order (even) */
+)
+{
+ SKP_int n, i;
+ double tmp1, tmp2;
+ double state[ MAX_SHAPE_LPC_ORDER + 1 ] = { 0 };
+ double C[ MAX_SHAPE_LPC_ORDER + 1 ] = { 0 };
+
+ /* Order must be even */
+ SKP_assert( ( order & 1 ) == 0 );
+
+ /* Loop over samples */
+ for( n = 0; n < length; n++ ) {
+ tmp1 = input[ n ];
+ /* Loop over allpass sections */
+ for( i = 0; i < order; i += 2 ) {
+ /* Output of allpass section */
+ tmp2 = state[ i ] + warping * ( state[ i + 1 ] - tmp1 );
+ state[ i ] = tmp1;
+ C[ i ] += state[ 0 ] * tmp1;
+ /* Output of allpass section */
+ tmp1 = state[ i + 1 ] + warping * ( state[ i + 2 ] - tmp2 );
+ state[ i + 1 ] = tmp2;
+ C[ i + 1 ] += state[ 0 ] * tmp2;
+ }
+ state[ order ] = tmp1;
+ C[ order ] += state[ 0 ] * tmp1;
+ }
+
+ /* Copy correlations in SKP_float output format */
+ for( i = 0; i < order + 1; i++ ) {
+ corr[ i ] = ( SKP_float )C[ i ];
+ }
+}
--- /dev/null
+++ b/src_FLP/SKP_Silk_wrappers_FLP.c
@@ -1,0 +1,194 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FLP.h"
+
+/* Wrappers. Calls flp / fix code */
+
+/* Convert AR filter coefficients to NLSF parameters */
+void SKP_Silk_A2NLSF_FLP(
+ SKP_int16 *NLSF_Q15, /* O NLSF vector [ LPC_order ] */
+ const SKP_float *pAR, /* I LPC coefficients [ LPC_order ] */
+ const SKP_int LPC_order /* I LPC order */
+)
+{
+ SKP_int i;
+ SKP_int32 a_fix_Q16[ MAX_LPC_ORDER ];
+
+ for( i = 0; i < LPC_order; i++ ) {
+ a_fix_Q16[ i ] = SKP_float2int( pAR[ i ] * 65536.0f );
+ }
+
+ SKP_Silk_A2NLSF( NLSF_Q15, a_fix_Q16, LPC_order );
+}
+
+/* Convert LSF parameters to AR prediction filter coefficients */
+void SKP_Silk_NLSF2A_stable_FLP(
+ SKP_float *pAR, /* O LPC coefficients [ LPC_order ] */
+ const SKP_int16 *NLSF_Q15, /* I NLSF vector [ LPC_order ] */
+ const SKP_int LPC_order /* I LPC order */
+)
+{
+ SKP_int i;
+ SKP_int16 a_fix_Q12[ MAX_LPC_ORDER ];
+
+ SKP_Silk_NLSF2A_stable( a_fix_Q12, NLSF_Q15, LPC_order );
+
+ for( i = 0; i < LPC_order; i++ ) {
+ pAR[ i ] = ( SKP_float )a_fix_Q12[ i ] * ( 1.0f / 4096.0f );
+ }
+}
+
+/******************************************/
+/* Floating-point NLSF processing wrapper */
+/******************************************/
+void SKP_Silk_process_NLSFs_FLP(
+ SKP_Silk_encoder_state *psEncC, /* I/O Encoder state */
+ SKP_float PredCoef[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */
+ SKP_int16 NLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */
+ const SKP_int16 prev_NLSF_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */
+)
+{
+ SKP_int i, j;
+ SKP_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ];
+
+ SKP_Silk_process_NLSFs( psEncC, PredCoef_Q12, NLSF_Q15, prev_NLSF_Q15);
+
+ for( j = 0; j < 2; j++ ) {
+ for( i = 0; i < psEncC->predictLPCOrder; i++ ) {
+ PredCoef[ j ][ i ] = ( SKP_float )PredCoef_Q12[ j ][ i ] * ( 1.0f / 4096.0f );
+ }
+ }
+}
+
+/****************************************/
+/* Floating-point Silk NSQ wrapper */
+/****************************************/
+void SKP_Silk_NSQ_wrapper_FLP(
+ SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
+ SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
+ SideInfoIndices *psIndices, /* I/O Quantization indices */
+ SKP_Silk_nsq_state *psNSQ, /* I/O Noise Shaping Quantzation state */
+ SKP_int8 pulses[], /* O Quantized pulse signal */
+ const SKP_float x[] /* I Prefiltered input signal */
+)
+{
+ SKP_int i, j;
+ SKP_int16 x_16[ MAX_FRAME_LENGTH ];
+ SKP_int32 Gains_Q16[ MAX_NB_SUBFR ];
+ SKP_DWORD_ALIGN SKP_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ];
+ SKP_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ];
+ SKP_int LTP_scale_Q14;
+
+ /* Noise shaping parameters */
+ SKP_int16 AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ];
+ SKP_int32 LF_shp_Q14[ MAX_NB_SUBFR ]; /* Packs two int16 coefficients per int32 value */
+ SKP_int Lambda_Q10;
+ SKP_int Tilt_Q14[ MAX_NB_SUBFR ];
+ SKP_int HarmShapeGain_Q14[ MAX_NB_SUBFR ];
+
+ /* Convert control struct to fix control struct */
+ /* Noise shape parameters */
+ for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
+ for( j = 0; j < psEnc->sCmn.shapingLPCOrder; j++ ) {
+ AR2_Q13[ i * MAX_SHAPE_LPC_ORDER + j ] = SKP_float2int( psEncCtrl->AR2[ i * MAX_SHAPE_LPC_ORDER + j ] * 8192.0f );
+ }
+ }
+
+ for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
+ LF_shp_Q14[ i ] = SKP_LSHIFT32( SKP_float2int( psEncCtrl->LF_AR_shp[ i ] * 16384.0f ), 16 ) |
+ (SKP_uint16)SKP_float2int( psEncCtrl->LF_MA_shp[ i ] * 16384.0f );
+ Tilt_Q14[ i ] = (SKP_int)SKP_float2int( psEncCtrl->Tilt[ i ] * 16384.0f );
+ HarmShapeGain_Q14[ i ] = (SKP_int)SKP_float2int( psEncCtrl->HarmShapeGain[ i ] * 16384.0f );
+ }
+ Lambda_Q10 = ( SKP_int )SKP_float2int( psEncCtrl->Lambda * 1024.0f );
+
+ /* prediction and coding parameters */
+ for( i = 0; i < psEnc->sCmn.nb_subfr * LTP_ORDER; i++ ) {
+ LTPCoef_Q14[ i ] = ( SKP_int16 )SKP_float2int( psEncCtrl->LTPCoef[ i ] * 16384.0f );
+ }
+
+ for( j = 0; j < 2; j++ ) {
+ for( i = 0; i < psEnc->sCmn.predictLPCOrder; i++ ) {
+ PredCoef_Q12[ j ][ i ] = ( SKP_int16 )SKP_float2int( psEncCtrl->PredCoef[ j ][ i ] * 4096.0f );
+ }
+ }
+
+ for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
+ Gains_Q16[ i ] = SKP_float2int( psEncCtrl->Gains[ i ] * 65536.0f );
+ SKP_assert( Gains_Q16[ i ] > 0 );
+ }
+
+ if( psIndices->signalType == TYPE_VOICED ) {
+ LTP_scale_Q14 = SKP_Silk_LTPScales_table_Q14[ psIndices->LTP_scaleIndex ];
+ } else {
+ LTP_scale_Q14 = 0;
+ }
+
+ /* Convert input to fix */
+ SKP_float2short_array( x_16, x, psEnc->sCmn.frame_length );
+
+ /* Call NSQ */
+ if( psEnc->sCmn.nStatesDelayedDecision > 1 || psEnc->sCmn.warping_Q16 > 0 ) {
+ SKP_Silk_NSQ_del_dec( &psEnc->sCmn, psNSQ, psIndices, x_16, pulses, PredCoef_Q12[ 0 ], LTPCoef_Q14,
+ AR2_Q13, HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, psEncCtrl->pitchL, Lambda_Q10, LTP_scale_Q14 );
+ } else {
+ SKP_Silk_NSQ( &psEnc->sCmn, psNSQ, psIndices, x_16, pulses, PredCoef_Q12[ 0 ], LTPCoef_Q14,
+ AR2_Q13, HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, psEncCtrl->pitchL, Lambda_Q10, LTP_scale_Q14 );
+ }
+}
+
+/***********************************************/
+/* Floating-point Silk LTP quantiation wrapper */
+/***********************************************/
+void SKP_Silk_quant_LTP_gains_FLP(
+ SKP_float B[ MAX_NB_SUBFR * LTP_ORDER ], /* I/O (Un-)quantized LTP gains */
+ SKP_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook index */
+ SKP_int8 *periodicity_index, /* O Periodicity index */
+ const SKP_float W[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* I Error weights */
+ const SKP_int mu_Q10, /* I Mu value (R/D tradeoff) */
+ const SKP_int lowComplexity, /* I Flag for low complexity */
+ const SKP_int nb_subfr /* I number of subframes */
+)
+{
+ SKP_int i;
+ SKP_int16 B_Q14[ MAX_NB_SUBFR * LTP_ORDER ];
+ SKP_int32 W_Q18[ MAX_NB_SUBFR*LTP_ORDER*LTP_ORDER ];
+
+ for( i = 0; i < nb_subfr * LTP_ORDER; i++ ) {
+ B_Q14[ i ] = (SKP_int16)SKP_float2int( B[ i ] * 16384.0f );
+ }
+ for( i = 0; i < nb_subfr * LTP_ORDER * LTP_ORDER; i++ ) {
+ W_Q18[ i ] = (SKP_int32)SKP_float2int( W[ i ] * 262144.0f );
+ }
+
+ SKP_Silk_quant_LTP_gains( B_Q14, cbk_index, periodicity_index, W_Q18, mu_Q10, lowComplexity, nb_subfr );
+
+ for( i = 0; i < nb_subfr * LTP_ORDER; i++ ) {
+ B[ i ] = (SKP_float)B_Q14[ i ] * ( 1.0f / 16384.0f );
+ }
+}
--- /dev/null
+++ b/src_FLP/src_FLP.vcxproj
@@ -1,0 +1,104 @@
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--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_A2NLSF.c
@@ -1,0 +1,279 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* Conversion between prediction filter coefficients and NLSFs */
+/* Requires the order to be an even number */
+/* A piecewise linear approximation maps LSF <-> cos(LSF) */
+/* Therefore the result is not accurate NLSFs, but the two */
+/* function are accurate inverses of each other */
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* Number of binary divisions, when not in low complexity mode */
+#define BIN_DIV_STEPS_A2NLSF_FIX 3 /* must be no higher than 16 - log2( LSF_COS_TAB_SZ_FIX ) */
+#define QPoly 16
+#define MAX_ITERATIONS_A2NLSF_FIX 30
+
+/* Flag for using 2x as many cosine sampling points, reduces the risk of missing a root */
+#define OVERSAMPLE_COSINE_TABLE 0
+
+/* Helper function for A2NLSF(..) */
+/* Transforms polynomials from cos(n*f) to cos(f)^n */
+SKP_INLINE void SKP_Silk_A2NLSF_trans_poly(
+ SKP_int32 *p, /* I/O Polynomial */
+ const SKP_int dd /* I Polynomial order (= filter order / 2 ) */
+)
+{
+ SKP_int k, n;
+
+ for( k = 2; k <= dd; k++ ) {
+ for( n = dd; n > k; n-- ) {
+ p[ n - 2 ] -= p[ n ];
+ }
+ p[ k - 2 ] -= SKP_LSHIFT( p[ k ], 1 );
+ }
+}
+/* Helper function for A2NLSF(..) */
+/* Polynomial evaluation */
+SKP_INLINE SKP_int32 SKP_Silk_A2NLSF_eval_poly( /* return the polynomial evaluation, in QPoly */
+ SKP_int32 *p, /* I Polynomial, QPoly */
+ const SKP_int32 x, /* I Evaluation point, Q12 */
+ const SKP_int dd /* I Order */
+)
+{
+ SKP_int n;
+ SKP_int32 x_Q16, y32;
+
+ y32 = p[ dd ]; /* QPoly */
+ x_Q16 = SKP_LSHIFT( x, 4 );
+ for( n = dd - 1; n >= 0; n-- ) {
+ y32 = SKP_SMLAWW( p[ n ], y32, x_Q16 ); /* QPoly */
+ }
+ return y32;
+}
+
+SKP_INLINE void SKP_Silk_A2NLSF_init(
+ const SKP_int32 *a_Q16,
+ SKP_int32 *P,
+ SKP_int32 *Q,
+ const SKP_int dd
+)
+{
+ SKP_int k;
+
+ /* Convert filter coefs to even and odd polynomials */
+ P[dd] = SKP_LSHIFT( 1, QPoly );
+ Q[dd] = SKP_LSHIFT( 1, QPoly );
+ for( k = 0; k < dd; k++ ) {
+#if( QPoly < 16 )
+ P[ k ] = SKP_RSHIFT_ROUND( -a_Q16[ dd - k - 1 ] - a_Q16[ dd + k ], 16 - QPoly ); /* QPoly */
+ Q[ k ] = SKP_RSHIFT_ROUND( -a_Q16[ dd - k - 1 ] + a_Q16[ dd + k ], 16 - QPoly ); /* QPoly */
+#elif( Qpoly == 16 )
+ P[ k ] = -a_Q16[ dd - k - 1 ] - a_Q16[ dd + k ]; // QPoly
+ Q[ k ] = -a_Q16[ dd - k - 1 ] + a_Q16[ dd + k ]; // QPoly
+#else
+ P[ k ] = SKP_LSHIFT( -a_Q16[ dd - k - 1 ] - a_Q16[ dd + k ], QPoly - 16 ); /* QPoly */
+ Q[ k ] = SKP_LSHIFT( -a_Q16[ dd - k - 1 ] + a_Q16[ dd + k ], QPoly - 16 ); /* QPoly */
+#endif
+ }
+
+ /* Divide out zeros as we have that for even filter orders, */
+ /* z = 1 is always a root in Q, and */
+ /* z = -1 is always a root in P */
+ for( k = dd; k > 0; k-- ) {
+ P[ k - 1 ] -= P[ k ];
+ Q[ k - 1 ] += Q[ k ];
+ }
+
+ /* Transform polynomials from cos(n*f) to cos(f)^n */
+ SKP_Silk_A2NLSF_trans_poly( P, dd );
+ SKP_Silk_A2NLSF_trans_poly( Q, dd );
+}
+
+/* Compute Normalized Line Spectral Frequencies (NLSFs) from whitening filter coefficients */
+/* If not all roots are found, the a_Q16 coefficients are bandwidth expanded until convergence. */
+void SKP_Silk_A2NLSF(
+ SKP_int16 *NLSF, /* O Normalized Line Spectral Frequencies, Q15 (0 - (2^15-1)), [d] */
+ SKP_int32 *a_Q16, /* I/O Monic whitening filter coefficients in Q16 [d] */
+ const SKP_int d /* I Filter order (must be even) */
+)
+{
+ SKP_int i, k, m, dd, root_ix, ffrac;
+ SKP_int32 xlo, xhi, xmid;
+ SKP_int32 ylo, yhi, ymid;
+ SKP_int32 nom, den;
+ SKP_int32 P[ SKP_Silk_MAX_ORDER_LPC / 2 + 1 ];
+ SKP_int32 Q[ SKP_Silk_MAX_ORDER_LPC / 2 + 1 ];
+ SKP_int32 *PQ[ 2 ];
+ SKP_int32 *p;
+
+ /* Store pointers to array */
+ PQ[ 0 ] = P;
+ PQ[ 1 ] = Q;
+
+ dd = SKP_RSHIFT( d, 1 );
+
+ SKP_Silk_A2NLSF_init( a_Q16, P, Q, dd );
+
+ /* Find roots, alternating between P and Q */
+ p = P; /* Pointer to polynomial */
+
+ xlo = SKP_Silk_LSFCosTab_FIX_Q12[ 0 ]; // Q12
+ ylo = SKP_Silk_A2NLSF_eval_poly( p, xlo, dd );
+
+ if( ylo < 0 ) {
+ /* Set the first NLSF to zero and move on to the next */
+ NLSF[ 0 ] = 0;
+ p = Q; /* Pointer to polynomial */
+ ylo = SKP_Silk_A2NLSF_eval_poly( p, xlo, dd );
+ root_ix = 1; /* Index of current root */
+ } else {
+ root_ix = 0; /* Index of current root */
+ }
+ k = 1; /* Loop counter */
+ i = 0; /* Counter for bandwidth expansions applied */
+ while( 1 ) {
+ /* Evaluate polynomial */
+#if OVERSAMPLE_COSINE_TABLE
+ xhi = SKP_Silk_LSFCosTab_FIX_Q12[ k >> 1 ] +
+ ( ( SKP_Silk_LSFCosTab_FIX_Q12[ ( k + 1 ) >> 1 ] -
+ SKP_Silk_LSFCosTab_FIX_Q12[ k >> 1 ] ) >> 1 ); /* Q12 */
+#else
+ xhi = SKP_Silk_LSFCosTab_FIX_Q12[ k ]; /* Q12 */
+#endif
+ yhi = SKP_Silk_A2NLSF_eval_poly( p, xhi, dd );
+
+ /* Detect zero crossing */
+ if( ( ylo <= 0 && yhi >= 0 ) || ( ylo >= 0 && yhi <= 0 ) ) {
+ /* Binary division */
+#if OVERSAMPLE_COSINE_TABLE
+ ffrac = -128;
+#else
+ ffrac = -256;
+#endif
+ for( m = 0; m < BIN_DIV_STEPS_A2NLSF_FIX; m++ ) {
+ /* Evaluate polynomial */
+ xmid = SKP_RSHIFT_ROUND( xlo + xhi, 1 );
+ ymid = SKP_Silk_A2NLSF_eval_poly( p, xmid, dd );
+
+ /* Detect zero crossing */
+ if( ( ylo <= 0 && ymid >= 0 ) || ( ylo >= 0 && ymid <= 0 ) ) {
+ /* Reduce frequency */
+ xhi = xmid;
+ yhi = ymid;
+ } else {
+ /* Increase frequency */
+ xlo = xmid;
+ ylo = ymid;
+#if OVERSAMPLE_COSINE_TABLE
+ ffrac = SKP_ADD_RSHIFT( ffrac, 64, m );
+#else
+ ffrac = SKP_ADD_RSHIFT( ffrac, 128, m );
+#endif
+ }
+ }
+
+ /* Interpolate */
+ if( SKP_abs( ylo ) < 65536 ) {
+ /* Avoid dividing by zero */
+ den = ylo - yhi;
+ nom = SKP_LSHIFT( ylo, 8 - BIN_DIV_STEPS_A2NLSF_FIX ) + SKP_RSHIFT( den, 1 );
+ if( den != 0 ) {
+ ffrac += SKP_DIV32( nom, den );
+ }
+ } else {
+ /* No risk of dividing by zero because abs(ylo - yhi) >= abs(ylo) >= 65536 */
+ ffrac += SKP_DIV32( ylo, SKP_RSHIFT( ylo - yhi, 8 - BIN_DIV_STEPS_A2NLSF_FIX ) );
+ }
+#if OVERSAMPLE_COSINE_TABLE
+ NLSF[ root_ix ] = (SKP_int16)SKP_min_32( SKP_LSHIFT( (SKP_int32)k, 7 ) + ffrac, SKP_int16_MAX );
+#else
+ NLSF[ root_ix ] = (SKP_int16)SKP_min_32( SKP_LSHIFT( (SKP_int32)k, 8 ) + ffrac, SKP_int16_MAX );
+#endif
+
+ SKP_assert( NLSF[ root_ix ] >= 0 );
+ SKP_assert( NLSF[ root_ix ] <= 32767 );
+
+ root_ix++; /* Next root */
+ if( root_ix >= d ) {
+ /* Found all roots */
+ break;
+ }
+ /* Alternate pointer to polynomial */
+ p = PQ[ root_ix & 1 ];
+
+ /* Evaluate polynomial */
+#if OVERSAMPLE_COSINE_TABLE
+ xlo = SKP_Silk_LSFCosTab_FIX_Q12[ ( k - 1 ) >> 1 ] +
+ ( ( SKP_Silk_LSFCosTab_FIX_Q12[ k >> 1 ] -
+ SKP_Silk_LSFCosTab_FIX_Q12[ ( k - 1 ) >> 1 ] ) >> 1 ); // Q12
+#else
+ xlo = SKP_Silk_LSFCosTab_FIX_Q12[ k - 1 ]; // Q12
+#endif
+ ylo = SKP_LSHIFT( 1 - ( root_ix & 2 ), 12 );
+ } else {
+ /* Increment loop counter */
+ k++;
+ xlo = xhi;
+ ylo = yhi;
+
+#if OVERSAMPLE_COSINE_TABLE
+ if( k > 2 * LSF_COS_TAB_SZ_FIX ) {
+#else
+ if( k > LSF_COS_TAB_SZ_FIX ) {
+#endif
+ i++;
+ if( i > MAX_ITERATIONS_A2NLSF_FIX ) {
+ /* Set NLSFs to white spectrum and exit */
+ NLSF[ 0 ] = (SKP_int16)SKP_DIV32_16( 1 << 15, d + 1 );
+ for( k = 1; k < d; k++ ) {
+ NLSF[ k ] = (SKP_int16)SKP_SMULBB( k + 1, NLSF[ 0 ] );
+ }
+ return;
+ }
+
+ /* Error: Apply progressively more bandwidth expansion and run again */
+ SKP_Silk_bwexpander_32( a_Q16, d, 65536 - SKP_SMULBB( 10 + i, i ) ); // 10_Q16 = 0.00015
+
+ SKP_Silk_A2NLSF_init( a_Q16, P, Q, dd );
+ p = P; /* Pointer to polynomial */
+ xlo = SKP_Silk_LSFCosTab_FIX_Q12[ 0 ]; // Q12
+ ylo = SKP_Silk_A2NLSF_eval_poly( p, xlo, dd );
+ if( ylo < 0 ) {
+ /* Set the first NLSF to zero and move on to the next */
+ NLSF[ 0 ] = 0;
+ p = Q; /* Pointer to polynomial */
+ ylo = SKP_Silk_A2NLSF_eval_poly( p, xlo, dd );
+ root_ix = 1; /* Index of current root */
+ } else {
+ root_ix = 0; /* Index of current root */
+ }
+ k = 1; /* Reset loop counter */
+ }
+ }
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_Inlines.h
@@ -1,0 +1,212 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/*! \file SKP_Silk_Inlines.h
+ * \brief SKP_Silk_Inlines.h defines inline signal processing functions.
+ */
+
+#ifndef _SKP_SILK_FIX_INLINES_H_
+#define _SKP_SILK_FIX_INLINES_H_
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/* count leading zeros of SKP_int64 */
+SKP_INLINE SKP_int32 SKP_Silk_CLZ64(SKP_int64 in)
+{
+ SKP_int32 in_upper;
+
+ in_upper = (SKP_int32)SKP_RSHIFT64(in, 32);
+ if (in_upper == 0) {
+ /* Search in the lower 32 bits */
+ return 32 + SKP_Silk_CLZ32( (SKP_int32) in );
+ } else {
+ /* Search in the upper 32 bits */
+ return SKP_Silk_CLZ32( in_upper );
+ }
+}
+
+/* get number of leading zeros and fractional part (the bits right after the leading one */
+SKP_INLINE void SKP_Silk_CLZ_FRAC(SKP_int32 in, /* I: input */
+ SKP_int32 *lz, /* O: number of leading zeros */
+ SKP_int32 *frac_Q7) /* O: the 7 bits right after the leading one */
+{
+ SKP_int32 lzeros = SKP_Silk_CLZ32(in);
+
+ * lz = lzeros;
+ * frac_Q7 = SKP_ROR32(in, 24 - lzeros) & 0x7f;
+}
+
+/* Approximation of square root */
+/* Accuracy: < +/- 10% for output values > 15 */
+/* < +/- 2.5% for output values > 120 */
+SKP_INLINE SKP_int32 SKP_Silk_SQRT_APPROX(SKP_int32 x)
+{
+ SKP_int32 y, lz, frac_Q7;
+
+ if( x <= 0 ) {
+ return 0;
+ }
+
+ SKP_Silk_CLZ_FRAC(x, &lz, &frac_Q7);
+
+ if( lz & 1 ) {
+ y = 32768;
+ } else {
+ y = 46214; /* 46214 = sqrt(2) * 32768 */
+ }
+
+ /* get scaling right */
+ y >>= SKP_RSHIFT(lz, 1);
+
+ /* increment using fractional part of input */
+ y = SKP_SMLAWB(y, y, SKP_SMULBB(213, frac_Q7));
+
+ return y;
+}
+
+/* returns the number of left shifts before overflow for a 16 bit number (ITU definition with norm(0)=0) */
+SKP_INLINE SKP_int32 SKP_Silk_norm16(SKP_int16 a) {
+
+ SKP_int32 a32;
+
+ /* if ((a == 0) || (a == SKP_int16_MIN)) return(0); */
+ if ((a << 1) == 0) return(0);
+
+ a32 = a;
+ /* if (a32 < 0) a32 = -a32 - 1; */
+ a32 ^= SKP_RSHIFT(a32, 31);
+
+ return SKP_Silk_CLZ32(a32) - 17;
+}
+
+/* returns the number of left shifts before overflow for a 32 bit number (ITU definition with norm(0)=0) */
+SKP_INLINE SKP_int32 SKP_Silk_norm32(SKP_int32 a) {
+
+ /* if ((a == 0) || (a == SKP_int32_MIN)) return(0); */
+ if ((a << 1) == 0) return(0);
+
+ /* if (a < 0) a = -a - 1; */
+ a ^= SKP_RSHIFT(a, 31);
+
+ return SKP_Silk_CLZ32(a) - 1;
+}
+
+/* Divide two int32 values and return result as int32 in a given Q-domain */
+SKP_INLINE SKP_int32 SKP_DIV32_varQ( /* O returns a good approximation of "(a32 << Qres) / b32" */
+ const SKP_int32 a32, /* I numerator (Q0) */
+ const SKP_int32 b32, /* I denominator (Q0) */
+ const SKP_int Qres /* I Q-domain of result (>= 0) */
+)
+{
+ SKP_int a_headrm, b_headrm, lshift;
+ SKP_int32 b32_inv, a32_nrm, b32_nrm, result;
+
+ SKP_assert( b32 != 0 );
+ SKP_assert( Qres >= 0 );
+
+ /* Compute number of bits head room and normalize inputs */
+ a_headrm = SKP_Silk_CLZ32( SKP_abs(a32) ) - 1;
+ a32_nrm = SKP_LSHIFT(a32, a_headrm); /* Q: a_headrm */
+ b_headrm = SKP_Silk_CLZ32( SKP_abs(b32) ) - 1;
+ b32_nrm = SKP_LSHIFT(b32, b_headrm); /* Q: b_headrm */
+
+ /* Inverse of b32, with 14 bits of precision */
+ b32_inv = SKP_DIV32_16( SKP_int32_MAX >> 2, SKP_RSHIFT(b32_nrm, 16) ); /* Q: 29 + 16 - b_headrm */
+
+ /* First approximation */
+ result = SKP_SMULWB(a32_nrm, b32_inv); /* Q: 29 + a_headrm - b_headrm */
+
+ /* Compute residual by subtracting product of denominator and first approximation */
+ a32_nrm -= SKP_LSHIFT_ovflw( SKP_SMMUL(b32_nrm, result), 3 ); /* Q: a_headrm */
+
+ /* Refinement */
+ result = SKP_SMLAWB(result, a32_nrm, b32_inv); /* Q: 29 + a_headrm - b_headrm */
+
+ /* Convert to Qres domain */
+ lshift = 29 + a_headrm - b_headrm - Qres;
+ if( lshift <= 0 ) {
+ return SKP_LSHIFT_SAT32(result, -lshift);
+ } else {
+ if( lshift < 32){
+ return SKP_RSHIFT(result, lshift);
+ } else {
+ /* Avoid undefined result */
+ return 0;
+ }
+ }
+}
+
+/* Invert int32 value and return result as int32 in a given Q-domain */
+SKP_INLINE SKP_int32 SKP_INVERSE32_varQ( /* O returns a good approximation of "(1 << Qres) / b32" */
+ const SKP_int32 b32, /* I denominator (Q0) */
+ const SKP_int Qres /* I Q-domain of result (> 0) */
+)
+{
+ SKP_int b_headrm, lshift;
+ SKP_int32 b32_inv, b32_nrm, err_Q32, result;
+
+ SKP_assert( b32 != 0 );
+ SKP_assert( Qres > 0 );
+
+ /* Compute number of bits head room and normalize input */
+ b_headrm = SKP_Silk_CLZ32( SKP_abs(b32) ) - 1;
+ b32_nrm = SKP_LSHIFT(b32, b_headrm); /* Q: b_headrm */
+
+ /* Inverse of b32, with 14 bits of precision */
+ b32_inv = SKP_DIV32_16( SKP_int32_MAX >> 2, SKP_RSHIFT(b32_nrm, 16) ); /* Q: 29 + 16 - b_headrm */
+
+ /* First approximation */
+ result = SKP_LSHIFT(b32_inv, 16); /* Q: 61 - b_headrm */
+
+ /* Compute residual by subtracting product of denominator and first approximation from one */
+ err_Q32 = SKP_LSHIFT_ovflw( -SKP_SMULWB(b32_nrm, b32_inv), 3 ); /* Q32 */
+
+ /* Refinement */
+ result = SKP_SMLAWW(result, err_Q32, b32_inv); /* Q: 61 - b_headrm */
+
+ /* Convert to Qres domain */
+ lshift = 61 - b_headrm - Qres;
+ if( lshift <= 0 ) {
+ return SKP_LSHIFT_SAT32(result, -lshift);
+ } else {
+ if( lshift < 32){
+ return SKP_RSHIFT(result, lshift);
+ }else{
+ /* Avoid undefined result */
+ return 0;
+ }
+ }
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //_SKP_SILK_FIX_INLINES_H_
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_LPC_analysis_filter.c
@@ -1,0 +1,79 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+/*******************************************/
+/* LPC analysis filter */
+/* NB! State is kept internally and the */
+/* filter always starts with zero state */
+/* first Order output samples are not set */
+/*******************************************/
+
+void SKP_Silk_LPC_analysis_filter(
+ SKP_int16 *out, /* O: Output signal */
+ const SKP_int16 *in, /* I: Input signal */
+ const SKP_int16 *B, /* I: MA prediction coefficients, Q12 [order] */
+ const SKP_int32 len, /* I: Signal length */
+ const SKP_int32 d /* I: Filter order */
+)
+{
+ SKP_int ix, j;
+ SKP_int32 out32_Q12, out32;
+ const SKP_int16 *in_ptr;
+
+ SKP_assert( d >= 6 );
+ SKP_assert( (d & 1) == 0 );
+ SKP_assert( d <= len );
+
+ for ( ix = d; ix < len; ix++) {
+ in_ptr = &in[ ix - 1 ];
+
+ out32_Q12 = SKP_SMULBB( in_ptr[ 0 ], B[ 0 ] );
+ out32_Q12 = SKP_SMLABB( out32_Q12, in_ptr[ -1 ], B[ 1 ] );
+ out32_Q12 = SKP_SMLABB( out32_Q12, in_ptr[ -2 ], B[ 2 ] );
+ out32_Q12 = SKP_SMLABB( out32_Q12, in_ptr[ -3 ], B[ 3 ] );
+ out32_Q12 = SKP_SMLABB( out32_Q12, in_ptr[ -4 ], B[ 4 ] );
+ out32_Q12 = SKP_SMLABB( out32_Q12, in_ptr[ -5 ], B[ 5 ] );
+ for( j = 6; j < d; j += 2 ) {
+ out32_Q12 = SKP_SMLABB( out32_Q12, in_ptr[ -j ], B[ j ] );
+ out32_Q12 = SKP_SMLABB( out32_Q12, in_ptr[ -j - 1 ], B[ j + 1 ] );
+ }
+
+ /* Subtract prediction */
+ out32_Q12 = SKP_SUB32( SKP_LSHIFT( (SKP_int32)in_ptr[ 1 ], 12 ), out32_Q12 );
+
+ /* Scale to Q0 */
+ out32 = SKP_RSHIFT_ROUND( out32_Q12, 12 );
+
+ /* Saturate output */
+ out[ ix ] = ( SKP_int16 )SKP_SAT16( out32 );
+ }
+
+ /* Set first LPC d samples to zero instead of undefined */
+ SKP_memset( out, 0, d * sizeof( SKP_int16 ) );
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_LPC_inv_pred_gain.c
@@ -1,0 +1,175 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_LPC_inverse_pred_gain.c *
+ * *
+ * Compute inverse of LPC prediction gain, and *
+ * test if LPC coefficients are stable (all poles within unit circle) *
+ * *
+ * Copyright 2008 (c), Skype Limited *
+ * */
+#include "SKP_Silk_SigProc_FIX.h"
+
+#define QA 16
+#define A_LIMIT SKP_FIX_CONST( 0.99975, QA )
+
+/* Compute inverse of LPC prediction gain, and */
+/* test if LPC coefficients are stable (all poles within unit circle) */
+static SKP_int LPC_inverse_pred_gain_QA( /* O: Returns 1 if unstable, otherwise 0 */
+ SKP_int32 *invGain_Q30, /* O: Inverse prediction gain, Q30 energy domain */
+ SKP_int32 A_QA[ 2 ][ SKP_Silk_MAX_ORDER_LPC ],
+ /* I: Prediction coefficients */
+ const SKP_int order /* I: Prediction order */
+)
+{
+ SKP_int k, n, headrm;
+ SKP_int32 rc_Q31, rc_mult1_Q30, rc_mult2_Q16, tmp_QA;
+ SKP_int32 *Aold_QA, *Anew_QA;
+
+ Anew_QA = A_QA[ order & 1 ];
+
+ *invGain_Q30 = ( 1 << 30 );
+ for( k = order - 1; k > 0; k-- ) {
+ /* Check for stability */
+ if( ( Anew_QA[ k ] > A_LIMIT ) || ( Anew_QA[ k ] < -A_LIMIT ) ) {
+ return 1;
+ }
+
+ /* Set RC equal to negated AR coef */
+ rc_Q31 = -SKP_LSHIFT( Anew_QA[ k ], 31 - QA );
+
+ /* rc_mult1_Q30 range: [ 1 : 2^30-1 ] */
+ rc_mult1_Q30 = ( SKP_int32_MAX >> 1 ) - SKP_SMMUL( rc_Q31, rc_Q31 );
+ SKP_assert( rc_mult1_Q30 > ( 1 << 15 ) ); /* reduce A_LIMIT if fails */
+ SKP_assert( rc_mult1_Q30 < ( 1 << 30 ) );
+
+ /* rc_mult2_Q16 range: [ 2^16 : SKP_int32_MAX ] */
+ rc_mult2_Q16 = SKP_INVERSE32_varQ( rc_mult1_Q30, 46 ); /* 16 = 46 - 30 */
+
+ /* Update inverse gain */
+ /* invGain_Q30 range: [ 0 : 2^30 ] */
+ *invGain_Q30 = SKP_LSHIFT( SKP_SMMUL( *invGain_Q30, rc_mult1_Q30 ), 2 );
+ SKP_assert( *invGain_Q30 >= 0 );
+ SKP_assert( *invGain_Q30 <= ( 1 << 30 ) );
+
+ /* Swap pointers */
+ Aold_QA = Anew_QA;
+ Anew_QA = A_QA[ k & 1 ];
+
+ /* Update AR coefficient */
+ headrm = SKP_Silk_CLZ32( rc_mult2_Q16 ) - 1;
+ rc_mult2_Q16 = SKP_LSHIFT( rc_mult2_Q16, headrm ); /* Q: 16 + headrm */
+ for( n = 0; n < k; n++ ) {
+ tmp_QA = Aold_QA[ n ] - SKP_LSHIFT( SKP_SMMUL( Aold_QA[ k - n - 1 ], rc_Q31 ), 1 );
+ Anew_QA[ n ] = SKP_LSHIFT( SKP_SMMUL( tmp_QA, rc_mult2_Q16 ), 16 - headrm );
+ }
+ }
+
+ /* Check for stability */
+ if( ( Anew_QA[ 0 ] > A_LIMIT ) || ( Anew_QA[ 0 ] < -A_LIMIT ) ) {
+ return 1;
+ }
+
+ /* Set RC equal to negated AR coef */
+ rc_Q31 = -SKP_LSHIFT( Anew_QA[ 0 ], 31 - QA );
+
+ /* Range: [ 1 : 2^30 ] */
+ rc_mult1_Q30 = ( SKP_int32_MAX >> 1 ) - SKP_SMMUL( rc_Q31, rc_Q31 );
+
+ /* Update inverse gain */
+ /* Range: [ 0 : 2^30 ] */
+ *invGain_Q30 = SKP_LSHIFT( SKP_SMMUL( *invGain_Q30, rc_mult1_Q30 ), 2 );
+ SKP_assert( *invGain_Q30 >= 0 );
+ SKP_assert( *invGain_Q30 <= 1<<30 );
+
+ return 0;
+}
+
+/* For input in Q12 domain */
+SKP_int SKP_Silk_LPC_inverse_pred_gain( /* O: Returns 1 if unstable, otherwise 0 */
+ SKP_int32 *invGain_Q30, /* O: Inverse prediction gain, Q30 energy domain */
+ const SKP_int16 *A_Q12, /* I: Prediction coefficients, Q12 [order] */
+ const SKP_int order /* I: Prediction order */
+)
+{
+ SKP_int k;
+ SKP_int32 Atmp_QA[ 2 ][ SKP_Silk_MAX_ORDER_LPC ];
+ SKP_int32 *Anew_QA;
+
+ Anew_QA = Atmp_QA[ order & 1 ];
+
+ /* Increase Q domain of the AR coefficients */
+ for( k = 0; k < order; k++ ) {
+ Anew_QA[ k ] = SKP_LSHIFT( (SKP_int32)A_Q12[ k ], QA - 12 );
+ }
+
+ return LPC_inverse_pred_gain_QA( invGain_Q30, Atmp_QA, order );
+}
+
+/* For input in Q13 domain */
+SKP_int SKP_Silk_LPC_inverse_pred_gain_Q13( /* O: Returns 1 if unstable, otherwise 0 */
+ SKP_int32 *invGain_Q30, /* O: Inverse prediction gain, Q30 energy domain */
+ const SKP_int16 *A_Q13, /* I: Prediction coefficients, Q13 [order] */
+ const SKP_int order /* I: Prediction order */
+)
+{
+ SKP_int k;
+ SKP_int32 Atmp_QA[ 2 ][ SKP_Silk_MAX_ORDER_LPC ];
+ SKP_int32 *Anew_QA;
+
+ Anew_QA = Atmp_QA[ order & 1 ];
+
+ /* Increase Q domain of the AR coefficients */
+ for( k = 0; k < order; k++ ) {
+ Anew_QA[ k ] = SKP_LSHIFT( (SKP_int32)A_Q13[ k ], QA - 13 );
+ }
+
+ return LPC_inverse_pred_gain_QA( invGain_Q30, Atmp_QA, order );
+}
+
+/* For input in Q24 domain */
+SKP_int SKP_Silk_LPC_inverse_pred_gain_Q24( /* O: Returns 1 if unstable, otherwise 0 */
+ SKP_int32 *invGain_Q30, /* O: Inverse prediction gain, Q30 energy domain */
+ const SKP_int32 *A_Q24, /* I: Prediction coefficients, Q24 [order] */
+ const SKP_int order /* I: Prediction order */
+)
+{
+ SKP_int k;
+ SKP_int32 Atmp_QA[ 2 ][ SKP_Silk_MAX_ORDER_LPC ];
+ SKP_int32 *Anew_QA;
+
+ Anew_QA = Atmp_QA[ order & 1 ];
+
+ /* Increase Q domain of the AR coefficients */
+ for( k = 0; k < order; k++ ) {
+ Anew_QA[ k ] = SKP_RSHIFT_ROUND( A_Q24[ k ], 24 - QA );
+ }
+
+ return LPC_inverse_pred_gain_QA( invGain_Q30, Atmp_QA, order );
+}
+
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_LPC_stabilize.c
@@ -1,0 +1,134 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_typedef.h"
+#include "SKP_Silk_SigProc_FIX.h"
+
+#define LPC_STABILIZE_LPC_MAX_ABS_VALUE_Q16 ( ( (SKP_int32)SKP_int16_MAX ) << 4 )
+
+/* LPC stabilizer, for a single input data vector */
+void SKP_Silk_LPC_stabilize(
+ SKP_int16 *a_Q12, /* O stabilized LPC vector [L] */
+ SKP_int32 *a_Q16, /* I LPC vector [L] */
+ const SKP_int32 bwe_Q16, /* I Bandwidth expansion factor */
+ const SKP_int L /* I Number of LPC parameters in the input vector */
+)
+{
+ SKP_int32 maxabs, absval, sc_Q16;
+ SKP_int i, idx = 0;
+ SKP_int32 invGain_Q30;
+
+ SKP_Silk_bwexpander_32( a_Q16, L, bwe_Q16 );
+
+ /***************************/
+ /* Limit range of the LPCs */
+ /***************************/
+ /* Limit the maximum absolute value of the prediction coefficients */
+ while( SKP_TRUE ) {
+ /* Find maximum absolute value and its index */
+ maxabs = SKP_int32_MIN;
+ for( i = 0; i < L; i++ ) {
+ absval = SKP_abs( a_Q16[ i ] );
+ if( absval > maxabs ) {
+ maxabs = absval;
+ idx = i;
+ }
+ }
+
+ if( maxabs >= LPC_STABILIZE_LPC_MAX_ABS_VALUE_Q16 ) {
+ /* Reduce magnitude of prediction coefficients */
+ sc_Q16 = SKP_DIV32( SKP_int32_MAX, SKP_RSHIFT( maxabs, 4 ) );
+ sc_Q16 = 65536 - sc_Q16;
+ sc_Q16 = SKP_DIV32( sc_Q16, idx + 1 );
+ sc_Q16 = 65536 - sc_Q16;
+ sc_Q16 = SKP_LSHIFT( SKP_SMULWB( sc_Q16, 32604 ), 1 ); // 0.995 in Q16
+ SKP_Silk_bwexpander_32( a_Q16, L, sc_Q16 );
+ } else {
+ break;
+ }
+ }
+
+ /* Convert to 16 bit Q12 */
+ for( i = 0; i < L; i++ ) {
+ a_Q12[ i ] = (SKP_int16)SKP_RSHIFT_ROUND( a_Q16[ i ], 4 );
+ }
+
+ /**********************/
+ /* Ensure stable LPCs */
+ /**********************/
+ while( SKP_Silk_LPC_inverse_pred_gain( &invGain_Q30, a_Q12, L ) == 1 ) {
+ SKP_Silk_bwexpander( a_Q12, L, 65339 ); // 0.997 in Q16
+ }
+}
+
+void SKP_Silk_LPC_fit(
+ SKP_int16 *a_QQ, /* O Stabilized LPC vector, Q(24-rshift) [L] */
+ SKP_int32 *a_Q24, /* I LPC vector [L] */
+ const SKP_int QQ, /* I Q domain of output LPC vector */
+ const SKP_int L /* I Number of LPC parameters in the input vector */
+)
+{
+ SKP_int i, rshift, idx = 0;
+ SKP_int32 maxabs, absval, sc_Q16;
+
+ rshift = 24 - QQ;
+
+ /***************************/
+ /* Limit range of the LPCs */
+ /***************************/
+ /* Limit the maximum absolute value of the prediction coefficients */
+ while( SKP_TRUE ) {
+ /* Find maximum absolute value and its index; assumes stable coefficients */
+ /* so that only the first half need to be tested */
+ maxabs = SKP_int32_MIN;
+ for( i = 1; i < L / 2; i++ ) {
+ absval = SKP_abs( a_Q24[ i ] );
+ if( absval > maxabs ) {
+ maxabs = absval;
+ idx = i;
+ }
+ }
+
+ maxabs = SKP_RSHIFT( maxabs, rshift );
+ if( maxabs >= SKP_int16_MAX ) {
+ /* Reduce magnitude of prediction coefficients */
+ maxabs = SKP_min( maxabs, 98369 ); // ( SKP_int32_MAX / ( 65470 >> 2 ) ) + SKP_int16_MAX = 98369
+ sc_Q16 = 65470 - SKP_DIV32( SKP_MUL( 65470 >> 2, maxabs - SKP_int16_MAX ),
+ SKP_RSHIFT32( SKP_MUL( maxabs, idx + 1), 2 ) );
+ SKP_Silk_bwexpander_32( a_Q24, L, sc_Q16 );
+ } else {
+ break;
+ }
+ }
+
+ /* Convert to 16 bit Q(24-rshift) */
+ SKP_assert( rshift > 0 );
+ SKP_assert( rshift < 31 );
+ for( i = 0; i < L; i++ ) {
+ a_QQ[ i ] = (SKP_int16)SKP_RSHIFT_ROUND( a_Q24[ i ], rshift );
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_LPC_synthesis_filter.c
@@ -1,0 +1,84 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_LPC_synthesis_filter.c *
+ * Coefficients are in Q12 *
+ * *
+ * even order AR filter *
+ * */
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* even order AR filter */
+void SKP_Silk_LPC_synthesis_filter(
+ const SKP_int16 *in, /* I: excitation signal */
+ const SKP_int16 *A_Q12, /* I: AR coefficients [Order], between -8_Q0 and 8_Q0 */
+ const SKP_int32 Gain_Q26, /* I: gain */
+ SKP_int32 *S, /* I/O: state vector [Order] */
+ SKP_int16 *out, /* O: output signal */
+ const SKP_int32 len, /* I: signal length */
+ const SKP_int Order /* I: filter order, must be even */
+)
+{
+ SKP_int k, j, idx, Order_half = SKP_RSHIFT( Order, 1 );
+ SKP_int32 SA, SB, out32_Q10, out32;
+
+ /* Order must be even */
+ SKP_assert( 2 * Order_half == Order );
+
+ /* S[] values are in Q14 */
+ for( k = 0; k < len; k++ ) {
+ SA = S[ Order - 1 ];
+ out32_Q10 = 0;
+ for( j = 0; j < ( Order_half - 1 ); j++ ) {
+ idx = SKP_SMULBB( 2, j ) + 1;
+ SB = S[ Order - 1 - idx ];
+ S[ Order - 1 - idx ] = SA;
+ out32_Q10 = SKP_SMLAWB( out32_Q10, SA, A_Q12[ ( j << 1 ) ] );
+ out32_Q10 = SKP_SMLAWB( out32_Q10, SB, A_Q12[ ( j << 1 ) + 1 ] );
+ SA = S[ Order - 2 - idx ];
+ S[ Order - 2 - idx ] = SB;
+ }
+
+ /* unrolled loop: epilog */
+ SB = S[ 0 ];
+ S[ 0 ] = SA;
+ out32_Q10 = SKP_SMLAWB( out32_Q10, SA, A_Q12[ Order - 2 ] );
+ out32_Q10 = SKP_SMLAWB( out32_Q10, SB, A_Q12[ Order - 1 ] );
+ /* apply gain to excitation signal and add to prediction */
+ out32_Q10 = SKP_ADD_SAT32( out32_Q10, SKP_SMULWB( Gain_Q26, in[ k ] ) );
+
+ /* scale to Q0 */
+ out32 = SKP_RSHIFT_ROUND( out32_Q10, 10 );
+
+ /* saturate output */
+ out[ k ] = ( SKP_int16 )SKP_SAT16( out32 );
+
+ /* move result into delay line */
+ S[ Order - 1 ] = SKP_LSHIFT_SAT32( out32_Q10, 4 );
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_LPC_synthesis_order16.c
@@ -1,0 +1,122 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_LPC_synthesis_order16.c *
+ * Coefficients are in Q12 *
+ * *
+ * 16th order AR filter *
+ * */
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* 16th order AR filter */
+void SKP_Silk_LPC_synthesis_order16(const SKP_int16 *in, /* I: excitation signal */
+ const SKP_int16 *A_Q12, /* I: AR coefficients [16], between -8_Q0 and 8_Q0 */
+ const SKP_int32 Gain_Q26, /* I: gain */
+ SKP_int32 *S, /* I/O: state vector [16] */
+ SKP_int16 *out, /* O: output signal */
+ const SKP_int32 len /* I: signal length, must be multiple of 16 */
+)
+{
+ SKP_int k;
+ SKP_int32 SA, SB, out32_Q10, out32;
+ for( k = 0; k < len; k++ ) {
+ /* unrolled loop: prolog */
+ /* multiply-add two prediction coefficients per iteration */
+ SA = S[ 15 ];
+ SB = S[ 14 ];
+ S[ 14 ] = SA;
+ out32_Q10 = SKP_SMULWB( SA, A_Q12[ 0 ] );
+ out32_Q10 = SKP_SMLAWB_ovflw( out32_Q10, SB, A_Q12[ 1 ] );
+ SA = S[ 13 ];
+ S[ 13 ] = SB;
+
+ /* unrolled loop: main loop */
+ SB = S[ 12 ];
+ S[ 12 ] = SA;
+ out32_Q10 = SKP_SMLAWB_ovflw( out32_Q10, SA, A_Q12[ 2 ] );
+ out32_Q10 = SKP_SMLAWB_ovflw( out32_Q10, SB, A_Q12[ 3 ] );
+ SA = S[ 11 ];
+ S[ 11 ] = SB;
+
+ SB = S[ 10 ];
+ S[ 10 ] = SA;
+ out32_Q10 = SKP_SMLAWB_ovflw( out32_Q10, SA, A_Q12[ 4 ] );
+ out32_Q10 = SKP_SMLAWB_ovflw( out32_Q10, SB, A_Q12[ 5 ] );
+ SA = S[ 9 ];
+ S[ 9 ] = SB;
+
+ SB = S[ 8 ];
+ S[ 8 ] = SA;
+ out32_Q10 = SKP_SMLAWB_ovflw( out32_Q10, SA, A_Q12[ 6 ] );
+ out32_Q10 = SKP_SMLAWB_ovflw( out32_Q10, SB, A_Q12[ 7 ] );
+ SA = S[ 7 ];
+ S[ 7 ] = SB;
+
+ SB = S[ 6 ];
+ S[ 6 ] = SA;
+ out32_Q10 = SKP_SMLAWB_ovflw( out32_Q10, SA, A_Q12[ 8 ] );
+ out32_Q10 = SKP_SMLAWB_ovflw( out32_Q10, SB, A_Q12[ 9 ] );
+ SA = S[ 5 ];
+ S[ 5 ] = SB;
+
+ SB = S[ 4 ];
+ S[ 4 ] = SA;
+ out32_Q10 = SKP_SMLAWB_ovflw( out32_Q10, SA, A_Q12[ 10 ] );
+ out32_Q10 = SKP_SMLAWB_ovflw( out32_Q10, SB, A_Q12[ 11 ] );
+ SA = S[ 3 ];
+ S[ 3 ] = SB;
+
+ SB = S[ 2 ];
+ S[ 2 ] = SA;
+ out32_Q10 = SKP_SMLAWB_ovflw( out32_Q10, SA, A_Q12[ 12 ] );
+ out32_Q10 = SKP_SMLAWB_ovflw( out32_Q10, SB, A_Q12[ 13 ] );
+ SA = S[ 1 ];
+ S[ 1 ] = SB;
+
+ /* unrolled loop: epilog */
+ SB = S[ 0 ];
+ S[ 0 ] = SA;
+ out32_Q10 = SKP_SMLAWB_ovflw( out32_Q10, SA, A_Q12[ 14 ] );
+ out32_Q10 = SKP_SMLAWB_ovflw( out32_Q10, SB, A_Q12[ 15 ] );
+
+ /* unrolled loop: end */
+ /* apply gain to excitation signal and add to prediction */
+ out32_Q10 = SKP_ADD_SAT32( out32_Q10, SKP_SMULWB( Gain_Q26, in[ k ] ) );
+
+ /* scale to Q0 */
+ out32 = SKP_RSHIFT_ROUND( out32_Q10, 10 );
+
+ /* saturate output */
+ out[ k ] = ( SKP_int16 )SKP_SAT16( out32 );
+
+ /* move result into delay line */
+ S[ 15 ] = SKP_LSHIFT_SAT32( out32_Q10, 4 );
+ }
+}
+
+
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_LSF_cos_table.c
@@ -1,0 +1,65 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+// Q12 values (even)
+const SKP_int SKP_Silk_LSFCosTab_FIX_Q12[LSF_COS_TAB_SZ_FIX + 1] = {
+ 8192, 8190, 8182, 8170,
+ 8152, 8130, 8104, 8072,
+ 8034, 7994, 7946, 7896,
+ 7840, 7778, 7714, 7644,
+ 7568, 7490, 7406, 7318,
+ 7226, 7128, 7026, 6922,
+ 6812, 6698, 6580, 6458,
+ 6332, 6204, 6070, 5934,
+ 5792, 5648, 5502, 5352,
+ 5198, 5040, 4880, 4718,
+ 4552, 4382, 4212, 4038,
+ 3862, 3684, 3502, 3320,
+ 3136, 2948, 2760, 2570,
+ 2378, 2186, 1990, 1794,
+ 1598, 1400, 1202, 1002,
+ 802, 602, 402, 202,
+ 0, -202, -402, -602,
+ -802, -1002, -1202, -1400,
+ -1598, -1794, -1990, -2186,
+ -2378, -2570, -2760, -2948,
+ -3136, -3320, -3502, -3684,
+ -3862, -4038, -4212, -4382,
+ -4552, -4718, -4880, -5040,
+ -5198, -5352, -5502, -5648,
+ -5792, -5934, -6070, -6204,
+ -6332, -6458, -6580, -6698,
+ -6812, -6922, -7026, -7128,
+ -7226, -7318, -7406, -7490,
+ -7568, -7644, -7714, -7778,
+ -7840, -7896, -7946, -7994,
+ -8034, -8072, -8104, -8130,
+ -8152, -8170, -8182, -8190,
+ -8192
+};
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_MacroCount.h
@@ -1,0 +1,719 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef _SIGPROCFIX_API_MACROCOUNT_H_
+#define _SIGPROCFIX_API_MACROCOUNT_H_
+#include <stdio.h>
+
+#ifdef SKP_MACRO_COUNT
+#define varDefine SKP_int64 ops_count = 0;
+
+extern SKP_int64 ops_count;
+
+SKP_INLINE SKP_int64 SKP_SaveCount(){
+ return(ops_count);
+}
+
+SKP_INLINE SKP_int64 SKP_SaveResetCount(){
+ SKP_int64 ret;
+
+ ret = ops_count;
+ ops_count = 0;
+ return(ret);
+}
+
+SKP_INLINE SKP_PrintCount(){
+ printf("ops_count = %d \n ", (SKP_int32)ops_count);
+}
+
+#undef SKP_MUL
+SKP_INLINE SKP_int32 SKP_MUL(SKP_int32 a32, SKP_int32 b32){
+ SKP_int32 ret;
+ ops_count += 4;
+ ret = a32 * b32;
+ return ret;
+}
+
+#undef SKP_MUL_uint
+SKP_INLINE SKP_uint32 SKP_MUL_uint(SKP_uint32 a32, SKP_uint32 b32){
+ SKP_uint32 ret;
+ ops_count += 4;
+ ret = a32 * b32;
+ return ret;
+}
+#undef SKP_MLA
+SKP_INLINE SKP_int32 SKP_MLA(SKP_int32 a32, SKP_int32 b32, SKP_int32 c32){
+ SKP_int32 ret;
+ ops_count += 4;
+ ret = a32 + b32 * c32;
+ return ret;
+}
+
+#undef SKP_MLA_uint
+SKP_INLINE SKP_int32 SKP_MLA_uint(SKP_uint32 a32, SKP_uint32 b32, SKP_uint32 c32){
+ SKP_uint32 ret;
+ ops_count += 4;
+ ret = a32 + b32 * c32;
+ return ret;
+}
+
+#undef SKP_SMULWB
+SKP_INLINE SKP_int32 SKP_SMULWB(SKP_int32 a32, SKP_int32 b32){
+ SKP_int32 ret;
+ ops_count += 5;
+ ret = (a32 >> 16) * (SKP_int32)((SKP_int16)b32) + (((a32 & 0x0000FFFF) * (SKP_int32)((SKP_int16)b32)) >> 16);
+ return ret;
+}
+#undef SKP_SMLAWB
+SKP_INLINE SKP_int32 SKP_SMLAWB(SKP_int32 a32, SKP_int32 b32, SKP_int32 c32){
+ SKP_int32 ret;
+ ops_count += 5;
+ ret = ((a32) + ((((b32) >> 16) * (SKP_int32)((SKP_int16)(c32))) + ((((b32) & 0x0000FFFF) * (SKP_int32)((SKP_int16)(c32))) >> 16)));
+ return ret;
+}
+
+#undef SKP_SMULWT
+SKP_INLINE SKP_int32 SKP_SMULWT(SKP_int32 a32, SKP_int32 b32){
+ SKP_int32 ret;
+ ops_count += 4;
+ ret = (a32 >> 16) * (b32 >> 16) + (((a32 & 0x0000FFFF) * (b32 >> 16)) >> 16);
+ return ret;
+}
+#undef SKP_SMLAWT
+SKP_INLINE SKP_int32 SKP_SMLAWT(SKP_int32 a32, SKP_int32 b32, SKP_int32 c32){
+ SKP_int32 ret;
+ ops_count += 4;
+ ret = a32 + ((b32 >> 16) * (c32 >> 16)) + (((b32 & 0x0000FFFF) * ((c32 >> 16)) >> 16));
+ return ret;
+}
+
+#undef SKP_SMULBB
+SKP_INLINE SKP_int32 SKP_SMULBB(SKP_int32 a32, SKP_int32 b32){
+ SKP_int32 ret;
+ ops_count += 1;
+ ret = (SKP_int32)((SKP_int16)a32) * (SKP_int32)((SKP_int16)b32);
+ return ret;
+}
+#undef SKP_SMLABB
+SKP_INLINE SKP_int32 SKP_SMLABB(SKP_int32 a32, SKP_int32 b32, SKP_int32 c32){
+ SKP_int32 ret;
+ ops_count += 1;
+ ret = a32 + (SKP_int32)((SKP_int16)b32) * (SKP_int32)((SKP_int16)c32);
+ return ret;
+}
+
+#undef SKP_SMULBT
+SKP_INLINE SKP_int32 SKP_SMULBT(SKP_int32 a32, SKP_int32 b32 ){
+ SKP_int32 ret;
+ ops_count += 4;
+ ret = ((SKP_int32)((SKP_int16)a32)) * (b32 >> 16);
+ return ret;
+}
+
+#undef SKP_SMLABT
+SKP_INLINE SKP_int32 SKP_SMLABT(SKP_int32 a32, SKP_int32 b32, SKP_int32 c32){
+ SKP_int32 ret;
+ ops_count += 1;
+ ret = a32 + ((SKP_int32)((SKP_int16)b32)) * (c32 >> 16);
+ return ret;
+}
+
+#undef SKP_SMULTT
+SKP_INLINE SKP_int32 SKP_SMULTT(SKP_int32 a32, SKP_int32 b32){
+ SKP_int32 ret;
+ ops_count += 1;
+ ret = (a32 >> 16) * (b32 >> 16);
+ return ret;
+}
+
+#undef SKP_SMLATT
+SKP_INLINE SKP_int32 SKP_SMLATT(SKP_int32 a32, SKP_int32 b32, SKP_int32 c32){
+ SKP_int32 ret;
+ ops_count += 1;
+ ret = a32 + (b32 >> 16) * (c32 >> 16);
+ return ret;
+}
+
+
+// multiply-accumulate macros that allow overflow in the addition (ie, no asserts in debug mode)
+#undef SKP_MLA_ovflw
+#define SKP_MLA_ovflw SKP_MLA
+
+#undef SKP_SMLABB_ovflw
+#define SKP_SMLABB_ovflw SKP_SMLABB
+
+#undef SKP_SMLABT_ovflw
+#define SKP_SMLABT_ovflw SKP_SMLABT
+
+#undef SKP_SMLATT_ovflw
+#define SKP_SMLATT_ovflw SKP_SMLATT
+
+#undef SKP_SMLAWB_ovflw
+#define SKP_SMLAWB_ovflw SKP_SMLAWB
+
+#undef SKP_SMLAWT_ovflw
+#define SKP_SMLAWT_ovflw SKP_SMLAWT
+
+#undef SKP_SMULL
+SKP_INLINE SKP_int64 SKP_SMULL(SKP_int32 a32, SKP_int32 b32){
+ SKP_int64 ret;
+ ops_count += 8;
+ ret = ((SKP_int64)(a32) * /*(SKP_int64)*/(b32));
+ return ret;
+}
+
+#undef SKP_SMLAL
+SKP_INLINE SKP_int64 SKP_SMLAL(SKP_int64 a64, SKP_int32 b32, SKP_int32 c32){
+ SKP_int64 ret;
+ ops_count += 8;
+ ret = a64 + ((SKP_int64)(b32) * /*(SKP_int64)*/(c32));
+ return ret;
+}
+#undef SKP_SMLALBB
+SKP_INLINE SKP_int64 SKP_SMLALBB(SKP_int64 a64, SKP_int16 b16, SKP_int16 c16){
+ SKP_int64 ret;
+ ops_count += 4;
+ ret = a64 + ((SKP_int64)(b16) * /*(SKP_int64)*/(c16));
+ return ret;
+}
+
+#undef SigProcFIX_CLZ16
+SKP_INLINE SKP_int32 SigProcFIX_CLZ16(SKP_int16 in16)
+{
+ SKP_int32 out32 = 0;
+ ops_count += 10;
+ if( in16 == 0 ) {
+ return 16;
+ }
+ /* test nibbles */
+ if( in16 & 0xFF00 ) {
+ if( in16 & 0xF000 ) {
+ in16 >>= 12;
+ } else {
+ out32 += 4;
+ in16 >>= 8;
+ }
+ } else {
+ if( in16 & 0xFFF0 ) {
+ out32 += 8;
+ in16 >>= 4;
+ } else {
+ out32 += 12;
+ }
+ }
+ /* test bits and return */
+ if( in16 & 0xC ) {
+ if( in16 & 0x8 )
+ return out32 + 0;
+ else
+ return out32 + 1;
+ } else {
+ if( in16 & 0xE )
+ return out32 + 2;
+ else
+ return out32 + 3;
+ }
+}
+
+#undef SigProcFIX_CLZ32
+SKP_INLINE SKP_int32 SigProcFIX_CLZ32(SKP_int32 in32)
+{
+ /* test highest 16 bits and convert to SKP_int16 */
+ ops_count += 2;
+ if( in32 & 0xFFFF0000 ) {
+ return SigProcFIX_CLZ16((SKP_int16)(in32 >> 16));
+ } else {
+ return SigProcFIX_CLZ16((SKP_int16)in32) + 16;
+ }
+}
+
+#undef SKP_DIV32
+SKP_INLINE SKP_int32 SKP_DIV32(SKP_int32 a32, SKP_int32 b32){
+ ops_count += 64;
+ return a32 / b32;
+}
+
+#undef SKP_DIV32_16
+SKP_INLINE SKP_int32 SKP_DIV32_16(SKP_int32 a32, SKP_int32 b32){
+ ops_count += 32;
+ return a32 / b32;
+}
+
+#undef SKP_SAT8
+SKP_INLINE SKP_int8 SKP_SAT8(SKP_int64 a){
+ SKP_int8 tmp;
+ ops_count += 1;
+ tmp = (SKP_int8)((a) > SKP_int8_MAX ? SKP_int8_MAX : \
+ ((a) < SKP_int8_MIN ? SKP_int8_MIN : (a)));
+ return(tmp);
+}
+
+#undef SKP_SAT16
+SKP_INLINE SKP_int16 SKP_SAT16(SKP_int64 a){
+ SKP_int16 tmp;
+ ops_count += 1;
+ tmp = (SKP_int16)((a) > SKP_int16_MAX ? SKP_int16_MAX : \
+ ((a) < SKP_int16_MIN ? SKP_int16_MIN : (a)));
+ return(tmp);
+}
+#undef SKP_SAT32
+SKP_INLINE SKP_int32 SKP_SAT32(SKP_int64 a){
+ SKP_int32 tmp;
+ ops_count += 1;
+ tmp = (SKP_int32)((a) > SKP_int32_MAX ? SKP_int32_MAX : \
+ ((a) < SKP_int32_MIN ? SKP_int32_MIN : (a)));
+ return(tmp);
+}
+#undef SKP_POS_SAT32
+SKP_INLINE SKP_int32 SKP_POS_SAT32(SKP_int64 a){
+ SKP_int32 tmp;
+ ops_count += 1;
+ tmp = (SKP_int32)((a) > SKP_int32_MAX ? SKP_int32_MAX : (a));
+ return(tmp);
+}
+
+#undef SKP_ADD_POS_SAT8
+SKP_INLINE SKP_int8 SKP_ADD_POS_SAT8(SKP_int64 a, SKP_int64 b){
+ SKP_int8 tmp;
+ ops_count += 1;
+ tmp = (SKP_int8)((((a)+(b)) & 0x80) ? SKP_int8_MAX : ((a)+(b)));
+ return(tmp);
+}
+#undef SKP_ADD_POS_SAT16
+SKP_INLINE SKP_int16 SKP_ADD_POS_SAT16(SKP_int64 a, SKP_int64 b){
+ SKP_int16 tmp;
+ ops_count += 1;
+ tmp = (SKP_int16)((((a)+(b)) & 0x8000) ? SKP_int16_MAX : ((a)+(b)));
+ return(tmp);
+}
+
+#undef SKP_ADD_POS_SAT32
+SKP_INLINE SKP_int32 SKP_ADD_POS_SAT32(SKP_int64 a, SKP_int64 b){
+ SKP_int32 tmp;
+ ops_count += 1;
+ tmp = (SKP_int32)((((a)+(b)) & 0x80000000) ? SKP_int32_MAX : ((a)+(b)));
+ return(tmp);
+}
+
+#undef SKP_ADD_POS_SAT64
+SKP_INLINE SKP_int64 SKP_ADD_POS_SAT64(SKP_int64 a, SKP_int64 b){
+ SKP_int64 tmp;
+ ops_count += 1;
+ tmp = ((((a)+(b)) & 0x8000000000000000LL) ? SKP_int64_MAX : ((a)+(b)));
+ return(tmp);
+}
+
+#undef SKP_LSHIFT8
+SKP_INLINE SKP_int8 SKP_LSHIFT8(SKP_int8 a, SKP_int32 shift){
+ SKP_int8 ret;
+ ops_count += 1;
+ ret = a << shift;
+ return ret;
+}
+#undef SKP_LSHIFT16
+SKP_INLINE SKP_int16 SKP_LSHIFT16(SKP_int16 a, SKP_int32 shift){
+ SKP_int16 ret;
+ ops_count += 1;
+ ret = a << shift;
+ return ret;
+}
+#undef SKP_LSHIFT32
+SKP_INLINE SKP_int32 SKP_LSHIFT32(SKP_int32 a, SKP_int32 shift){
+ SKP_int32 ret;
+ ops_count += 1;
+ ret = a << shift;
+ return ret;
+}
+#undef SKP_LSHIFT64
+SKP_INLINE SKP_int64 SKP_LSHIFT64(SKP_int64 a, SKP_int shift){
+ ops_count += 1;
+ return a << shift;
+}
+
+#undef SKP_LSHIFT_ovflw
+SKP_INLINE SKP_int32 SKP_LSHIFT_ovflw(SKP_int32 a, SKP_int32 shift){
+ ops_count += 1;
+ return a << shift;
+}
+
+#undef SKP_LSHIFT_uint
+SKP_INLINE SKP_uint32 SKP_LSHIFT_uint(SKP_uint32 a, SKP_int32 shift){
+ SKP_uint32 ret;
+ ops_count += 1;
+ ret = a << shift;
+ return ret;
+}
+
+#undef SKP_RSHIFT8
+SKP_INLINE SKP_int8 SKP_RSHIFT8(SKP_int8 a, SKP_int32 shift){
+ ops_count += 1;
+ return a >> shift;
+}
+#undef SKP_RSHIFT16
+SKP_INLINE SKP_int16 SKP_RSHIFT16(SKP_int16 a, SKP_int32 shift){
+ ops_count += 1;
+ return a >> shift;
+}
+#undef SKP_RSHIFT32
+SKP_INLINE SKP_int32 SKP_RSHIFT32(SKP_int32 a, SKP_int32 shift){
+ ops_count += 1;
+ return a >> shift;
+}
+#undef SKP_RSHIFT64
+SKP_INLINE SKP_int64 SKP_RSHIFT64(SKP_int64 a, SKP_int64 shift){
+ ops_count += 1;
+ return a >> shift;
+}
+
+#undef SKP_RSHIFT_uint
+SKP_INLINE SKP_uint32 SKP_RSHIFT_uint(SKP_uint32 a, SKP_int32 shift){
+ ops_count += 1;
+ return a >> shift;
+}
+
+#undef SKP_ADD_LSHIFT
+SKP_INLINE SKP_int32 SKP_ADD_LSHIFT(SKP_int32 a, SKP_int32 b, SKP_int32 shift){
+ SKP_int32 ret;
+ ops_count += 1;
+ ret = a + (b << shift);
+ return ret; // shift >= 0
+}
+#undef SKP_ADD_LSHIFT32
+SKP_INLINE SKP_int32 SKP_ADD_LSHIFT32(SKP_int32 a, SKP_int32 b, SKP_int32 shift){
+ SKP_int32 ret;
+ ops_count += 1;
+ ret = a + (b << shift);
+ return ret; // shift >= 0
+}
+#undef SKP_ADD_LSHIFT_uint
+SKP_INLINE SKP_uint32 SKP_ADD_LSHIFT_uint(SKP_uint32 a, SKP_uint32 b, SKP_int32 shift){
+ SKP_uint32 ret;
+ ops_count += 1;
+ ret = a + (b << shift);
+ return ret; // shift >= 0
+}
+#undef SKP_ADD_RSHIFT
+SKP_INLINE SKP_int32 SKP_ADD_RSHIFT(SKP_int32 a, SKP_int32 b, SKP_int32 shift){
+ SKP_int32 ret;
+ ops_count += 1;
+ ret = a + (b >> shift);
+ return ret; // shift > 0
+}
+#undef SKP_ADD_RSHIFT32
+SKP_INLINE SKP_int32 SKP_ADD_RSHIFT32(SKP_int32 a, SKP_int32 b, SKP_int32 shift){
+ SKP_int32 ret;
+ ops_count += 1;
+ ret = a + (b >> shift);
+ return ret; // shift > 0
+}
+#undef SKP_ADD_RSHIFT_uint
+SKP_INLINE SKP_uint32 SKP_ADD_RSHIFT_uint(SKP_uint32 a, SKP_uint32 b, SKP_int32 shift){
+ SKP_uint32 ret;
+ ops_count += 1;
+ ret = a + (b >> shift);
+ return ret; // shift > 0
+}
+#undef SKP_SUB_LSHIFT32
+SKP_INLINE SKP_int32 SKP_SUB_LSHIFT32(SKP_int32 a, SKP_int32 b, SKP_int32 shift){
+ SKP_int32 ret;
+ ops_count += 1;
+ ret = a - (b << shift);
+ return ret; // shift >= 0
+}
+#undef SKP_SUB_RSHIFT32
+SKP_INLINE SKP_int32 SKP_SUB_RSHIFT32(SKP_int32 a, SKP_int32 b, SKP_int32 shift){
+ SKP_int32 ret;
+ ops_count += 1;
+ ret = a - (b >> shift);
+ return ret; // shift > 0
+}
+
+#undef SKP_RSHIFT_ROUND
+SKP_INLINE SKP_int32 SKP_RSHIFT_ROUND(SKP_int32 a, SKP_int32 shift){
+ SKP_int32 ret;
+ ops_count += 3;
+ ret = shift == 1 ? (a >> 1) + (a & 1) : ((a >> (shift - 1)) + 1) >> 1;
+ return ret;
+}
+
+#undef SKP_RSHIFT_ROUND64
+SKP_INLINE SKP_int64 SKP_RSHIFT_ROUND64(SKP_int64 a, SKP_int32 shift){
+ SKP_int64 ret;
+ ops_count += 6;
+ ret = shift == 1 ? (a >> 1) + (a & 1) : ((a >> (shift - 1)) + 1) >> 1;
+ return ret;
+}
+
+#undef SKP_abs_int64
+SKP_INLINE SKP_int64 SKP_abs_int64(SKP_int64 a){
+ ops_count += 1;
+ return (((a) > 0) ? (a) : -(a)); // Be careful, SKP_abs returns wrong when input equals to SKP_intXX_MIN
+}
+
+#undef SKP_abs_int32
+SKP_INLINE SKP_int32 SKP_abs_int32(SKP_int32 a){
+ ops_count += 1;
+ return abs(a);
+}
+
+
+#undef SKP_min
+static SKP_min(a, b){
+ ops_count += 1;
+ return (((a) < (b)) ? (a) : (b));
+}
+#undef SKP_max
+static SKP_max(a, b){
+ ops_count += 1;
+ return (((a) > (b)) ? (a) : (b));
+}
+#undef SKP_sign
+static SKP_sign(a){
+ ops_count += 1;
+ return ((a) > 0 ? 1 : ( (a) < 0 ? -1 : 0 ));
+}
+
+#undef SKP_ADD16
+SKP_INLINE SKP_int16 SKP_ADD16(SKP_int16 a, SKP_int16 b){
+ SKP_int16 ret;
+ ops_count += 1;
+ ret = a + b;
+ return ret;
+}
+
+#undef SKP_ADD32
+SKP_INLINE SKP_int32 SKP_ADD32(SKP_int32 a, SKP_int32 b){
+ SKP_int32 ret;
+ ops_count += 1;
+ ret = a + b;
+ return ret;
+}
+
+#undef SKP_ADD64
+SKP_INLINE SKP_int64 SKP_ADD64(SKP_int64 a, SKP_int64 b){
+ SKP_int64 ret;
+ ops_count += 2;
+ ret = a + b;
+ return ret;
+}
+
+#undef SKP_SUB16
+SKP_INLINE SKP_int16 SKP_SUB16(SKP_int16 a, SKP_int16 b){
+ SKP_int16 ret;
+ ops_count += 1;
+ ret = a - b;
+ return ret;
+}
+
+#undef SKP_SUB32
+SKP_INLINE SKP_int32 SKP_SUB32(SKP_int32 a, SKP_int32 b){
+ SKP_int32 ret;
+ ops_count += 1;
+ ret = a - b;
+ return ret;
+}
+
+#undef SKP_SUB64
+SKP_INLINE SKP_int64 SKP_SUB64(SKP_int64 a, SKP_int64 b){
+ SKP_int64 ret;
+ ops_count += 2;
+ ret = a - b;
+ return ret;
+}
+
+#undef SKP_ADD_SAT16
+SKP_INLINE SKP_int16 SKP_ADD_SAT16( SKP_int16 a16, SKP_int16 b16 ) {
+ SKP_int16 res;
+ // Nb will be counted in AKP_add32 and SKP_SAT16
+ res = (SKP_int16)SKP_SAT16( SKP_ADD32( (SKP_int32)(a16), (b16) ) );
+ return res;
+}
+
+#undef SKP_ADD_SAT32
+SKP_INLINE SKP_int32 SKP_ADD_SAT32(SKP_int32 a32, SKP_int32 b32){
+ SKP_int32 res;
+ ops_count += 1;
+ res = ((((a32) + (b32)) & 0x80000000) == 0 ? \
+ ((((a32) & (b32)) & 0x80000000) != 0 ? SKP_int32_MIN : (a32)+(b32)) : \
+ ((((a32) | (b32)) & 0x80000000) == 0 ? SKP_int32_MAX : (a32)+(b32)) );
+ return res;
+}
+
+#undef SKP_ADD_SAT64
+SKP_INLINE SKP_int64 SKP_ADD_SAT64( SKP_int64 a64, SKP_int64 b64 ) {
+ SKP_int64 res;
+ ops_count += 1;
+ res = ((((a64) + (b64)) & 0x8000000000000000LL) == 0 ? \
+ ((((a64) & (b64)) & 0x8000000000000000LL) != 0 ? SKP_int64_MIN : (a64)+(b64)) : \
+ ((((a64) | (b64)) & 0x8000000000000000LL) == 0 ? SKP_int64_MAX : (a64)+(b64)) );
+ return res;
+}
+
+#undef SKP_SUB_SAT16
+SKP_INLINE SKP_int16 SKP_SUB_SAT16( SKP_int16 a16, SKP_int16 b16 ) {
+ SKP_int16 res;
+ SKP_assert(0);
+ // Nb will be counted in sub-macros
+ res = (SKP_int16)SKP_SAT16( SKP_SUB32( (SKP_int32)(a16), (b16) ) );
+ return res;
+}
+
+#undef SKP_SUB_SAT32
+SKP_INLINE SKP_int32 SKP_SUB_SAT32( SKP_int32 a32, SKP_int32 b32 ) {
+ SKP_int32 res;
+ ops_count += 1;
+ res = ((((a32)-(b32)) & 0x80000000) == 0 ? \
+ (( (a32) & ((b32)^0x80000000) & 0x80000000) ? SKP_int32_MIN : (a32)-(b32)) : \
+ ((((a32)^0x80000000) & (b32) & 0x80000000) ? SKP_int32_MAX : (a32)-(b32)) );
+ return res;
+}
+
+#undef SKP_SUB_SAT64
+SKP_INLINE SKP_int64 SKP_SUB_SAT64( SKP_int64 a64, SKP_int64 b64 ) {
+ SKP_int64 res;
+ ops_count += 1;
+ res = ((((a64)-(b64)) & 0x8000000000000000LL) == 0 ? \
+ (( (a64) & ((b64)^0x8000000000000000LL) & 0x8000000000000000LL) ? SKP_int64_MIN : (a64)-(b64)) : \
+ ((((a64)^0x8000000000000000LL) & (b64) & 0x8000000000000000LL) ? SKP_int64_MAX : (a64)-(b64)) );
+
+ return res;
+}
+
+#undef SKP_SMULWW
+SKP_INLINE SKP_int32 SKP_SMULWW(SKP_int32 a32, SKP_int32 b32){
+ SKP_int32 ret;
+ // Nb will be counted in sub-macros
+ ret = SKP_MLA(SKP_SMULWB((a32), (b32)), (a32), SKP_RSHIFT_ROUND((b32), 16));
+ return ret;
+}
+
+#undef SKP_SMLAWW
+SKP_INLINE SKP_int32 SKP_SMLAWW(SKP_int32 a32, SKP_int32 b32, SKP_int32 c32){
+ SKP_int32 ret;
+ // Nb will be counted in sub-macros
+ ret = SKP_MLA(SKP_SMLAWB((a32), (b32), (c32)), (b32), SKP_RSHIFT_ROUND((c32), 16));
+ return ret;
+}
+
+#undef SKP_min_int
+SKP_INLINE SKP_int SKP_min_int(SKP_int a, SKP_int b)
+{
+ ops_count += 1;
+ return (((a) < (b)) ? (a) : (b));
+}
+
+#undef SKP_min_16
+SKP_INLINE SKP_int16 SKP_min_16(SKP_int16 a, SKP_int16 b)
+{
+ ops_count += 1;
+ return (((a) < (b)) ? (a) : (b));
+}
+#undef SKP_min_32
+SKP_INLINE SKP_int32 SKP_min_32(SKP_int32 a, SKP_int32 b)
+{
+ ops_count += 1;
+ return (((a) < (b)) ? (a) : (b));
+}
+#undef SKP_min_64
+SKP_INLINE SKP_int64 SKP_min_64(SKP_int64 a, SKP_int64 b)
+{
+ ops_count += 1;
+ return (((a) < (b)) ? (a) : (b));
+}
+
+/* SKP_min() versions with typecast in the function call */
+#undef SKP_max_int
+SKP_INLINE SKP_int SKP_max_int(SKP_int a, SKP_int b)
+{
+ ops_count += 1;
+ return (((a) > (b)) ? (a) : (b));
+}
+#undef SKP_max_16
+SKP_INLINE SKP_int16 SKP_max_16(SKP_int16 a, SKP_int16 b)
+{
+ ops_count += 1;
+ return (((a) > (b)) ? (a) : (b));
+}
+#undef SKP_max_32
+SKP_INLINE SKP_int32 SKP_max_32(SKP_int32 a, SKP_int32 b)
+{
+ ops_count += 1;
+ return (((a) > (b)) ? (a) : (b));
+}
+
+#undef SKP_max_64
+SKP_INLINE SKP_int64 SKP_max_64(SKP_int64 a, SKP_int64 b)
+{
+ ops_count += 1;
+ return (((a) > (b)) ? (a) : (b));
+}
+
+
+#undef SKP_LIMIT_int
+SKP_INLINE SKP_int SKP_LIMIT_int(SKP_int a, SKP_int limit1, SKP_int limit2)
+{
+ SKP_int ret;
+ ops_count += 6;
+
+ ret = ((limit1) > (limit2) ? ((a) > (limit1) ? (limit1) : ((a) < (limit2) ? (limit2) : (a))) \
+ : ((a) > (limit2) ? (limit2) : ((a) < (limit1) ? (limit1) : (a))));
+
+ return(ret);
+}
+
+#undef SKP_LIMIT_16
+SKP_INLINE SKP_int16 SKP_LIMIT_16(SKP_int16 a, SKP_int16 limit1, SKP_int16 limit2)
+{
+ SKP_int16 ret;
+ ops_count += 6;
+
+ ret = ((limit1) > (limit2) ? ((a) > (limit1) ? (limit1) : ((a) < (limit2) ? (limit2) : (a))) \
+ : ((a) > (limit2) ? (limit2) : ((a) < (limit1) ? (limit1) : (a))));
+
+return(ret);
+}
+
+
+#undef SKP_LIMIT_32
+SKP_INLINE SKP_int SKP_LIMIT_32(SKP_int32 a, SKP_int32 limit1, SKP_int32 limit2)
+{
+ SKP_int32 ret;
+ ops_count += 6;
+
+ ret = ((limit1) > (limit2) ? ((a) > (limit1) ? (limit1) : ((a) < (limit2) ? (limit2) : (a))) \
+ : ((a) > (limit2) ? (limit2) : ((a) < (limit1) ? (limit1) : (a))));
+ return(ret);
+}
+
+#else
+#define exVarDefine
+#define varDefine
+#define SKP_SaveCount()
+
+#endif
+#endif
+
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_MacroDebug.h
@@ -1,0 +1,559 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef _SIGPROCFIX_API_DEBUG_H_
+#define _SIGPROCFIX_API_DEBUG_H_
+
+// Redefine macro functions with extensive assertion in Win32_DEBUG mode.
+// As function can't be undefined, this file can't work with SigProcFIX_MacroCount.h
+
+#if 0 && defined (_WIN32) && defined (_DEBUG) && !defined (SKP_MACRO_COUNT)
+
+#undef SKP_ADD16
+SKP_INLINE SKP_int16 SKP_ADD16(SKP_int16 a, SKP_int16 b){
+ SKP_int16 ret;
+
+ ret = a + b;
+ SKP_assert( ret == SKP_ADD_SAT16( a, b ));
+ return ret;
+}
+
+#undef SKP_ADD32
+SKP_INLINE SKP_int32 SKP_ADD32(SKP_int32 a, SKP_int32 b){
+ SKP_int32 ret;
+
+ ret = a + b;
+ SKP_assert( ret == SKP_ADD_SAT32( a, b ));
+ return ret;
+}
+
+#undef SKP_ADD64
+SKP_INLINE SKP_int64 SKP_ADD64(SKP_int64 a, SKP_int64 b){
+ SKP_int64 ret;
+
+ ret = a + b;
+ SKP_assert( ret == SKP_ADD_SAT64( a, b ));
+ return ret;
+}
+
+#undef SKP_SUB16
+SKP_INLINE SKP_int16 SKP_SUB16(SKP_int16 a, SKP_int16 b){
+ SKP_int16 ret;
+
+ ret = a - b;
+ SKP_assert( ret == SKP_SUB_SAT16( a, b ));
+ return ret;
+}
+
+#undef SKP_SUB32
+SKP_INLINE SKP_int32 SKP_SUB32(SKP_int32 a, SKP_int32 b){
+ SKP_int32 ret;
+
+ ret = a - b;
+ SKP_assert( ret == SKP_SUB_SAT32( a, b ));
+ return ret;
+}
+
+#undef SKP_SUB64
+SKP_INLINE SKP_int64 SKP_SUB64(SKP_int64 a, SKP_int64 b){
+ SKP_int64 ret;
+
+ ret = a - b;
+ SKP_assert( ret == SKP_SUB_SAT64( a, b ));
+ return ret;
+}
+
+#undef SKP_ADD_SAT16
+SKP_INLINE SKP_int16 SKP_ADD_SAT16( SKP_int16 a16, SKP_int16 b16 ) {
+ SKP_int16 res;
+ res = (SKP_int16)SKP_SAT16( SKP_ADD32( (SKP_int32)(a16), (b16) ) );
+ SKP_assert( res == SKP_SAT16( ( SKP_int32 )a16 + ( SKP_int32 )b16 ) );
+ return res;
+}
+
+#undef SKP_ADD_SAT32
+SKP_INLINE SKP_int32 SKP_ADD_SAT32(SKP_int32 a32, SKP_int32 b32){
+ SKP_int32 res;
+ res = ((((a32) + (b32)) & 0x80000000) == 0 ? \
+ ((((a32) & (b32)) & 0x80000000) != 0 ? SKP_int32_MIN : (a32)+(b32)) : \
+ ((((a32) | (b32)) & 0x80000000) == 0 ? SKP_int32_MAX : (a32)+(b32)) );
+ SKP_assert( res == SKP_SAT32( ( SKP_int64 )a32 + ( SKP_int64 )b32 ) );
+ return res;
+}
+
+#undef SKP_ADD_SAT64
+SKP_INLINE SKP_int64 SKP_ADD_SAT64( SKP_int64 a64, SKP_int64 b64 ) {
+ SKP_int64 res;
+ res = ((((a64) + (b64)) & 0x8000000000000000LL) == 0 ? \
+ ((((a64) & (b64)) & 0x8000000000000000LL) != 0 ? SKP_int64_MIN : (a64)+(b64)) : \
+ ((((a64) | (b64)) & 0x8000000000000000LL) == 0 ? SKP_int64_MAX : (a64)+(b64)) );
+ if( res != a64 + b64 ) {
+ // Check that we saturated to the correct extreme value
+ SKP_assert( ( res == SKP_int64_MAX && ( ( a64 >> 1 ) + ( b64 >> 1 ) > ( SKP_int64_MAX >> 3 ) ) ) ||
+ ( res == SKP_int64_MIN && ( ( a64 >> 1 ) + ( b64 >> 1 ) < ( SKP_int64_MIN >> 3 ) ) ) );
+ } else {
+ // Saturation not necessary
+ SKP_assert( res == a64 + b64 );
+ }
+ return res;
+}
+
+#undef SKP_SUB_SAT16
+SKP_INLINE SKP_int16 SKP_SUB_SAT16( SKP_int16 a16, SKP_int16 b16 ) {
+ SKP_int16 res;
+ res = (SKP_int16)SKP_SAT16( SKP_SUB32( (SKP_int32)(a16), (b16) ) );
+ SKP_assert( res == SKP_SAT16( ( SKP_int32 )a16 - ( SKP_int32 )b16 ) );
+ return res;
+}
+
+#undef SKP_SUB_SAT32
+SKP_INLINE SKP_int32 SKP_SUB_SAT32( SKP_int32 a32, SKP_int32 b32 ) {
+ SKP_int32 res;
+ res = ((((a32)-(b32)) & 0x80000000) == 0 ? \
+ (( (a32) & ((b32)^0x80000000) & 0x80000000) ? SKP_int32_MIN : (a32)-(b32)) : \
+ ((((a32)^0x80000000) & (b32) & 0x80000000) ? SKP_int32_MAX : (a32)-(b32)) );
+ SKP_assert( res == SKP_SAT32( ( SKP_int64 )a32 - ( SKP_int64 )b32 ) );
+ return res;
+}
+
+#undef SKP_SUB_SAT64
+SKP_INLINE SKP_int64 SKP_SUB_SAT64( SKP_int64 a64, SKP_int64 b64 ) {
+ SKP_int64 res;
+ res = ((((a64)-(b64)) & 0x8000000000000000LL) == 0 ? \
+ (( (a64) & ((b64)^0x8000000000000000LL) & 0x8000000000000000LL) ? SKP_int64_MIN : (a64)-(b64)) : \
+ ((((a64)^0x8000000000000000LL) & (b64) & 0x8000000000000000LL) ? SKP_int64_MAX : (a64)-(b64)) );
+
+ if( res != a64 - b64 ) {
+ // Check that we saturated to the correct extreme value
+ SKP_assert( ( res == SKP_int64_MAX && ( ( a64 >> 1 ) + ( b64 >> 1 ) > ( SKP_int64_MAX >> 3 ) ) ) ||
+ ( res == SKP_int64_MIN && ( ( a64 >> 1 ) + ( b64 >> 1 ) < ( SKP_int64_MIN >> 3 ) ) ) );
+ } else {
+ // Saturation not necessary
+ SKP_assert( res == a64 - b64 );
+ }
+ return res;
+}
+
+#undef SKP_MUL
+SKP_INLINE SKP_int32 SKP_MUL(SKP_int32 a32, SKP_int32 b32){
+ SKP_int32 ret;
+ SKP_int64 ret64; // Will easily show how many bits that are needed
+ ret = a32 * b32;
+ ret64 = (SKP_int64)a32 * (SKP_int64)b32;
+ SKP_assert((SKP_int64)ret == ret64 ); //Check output overflow
+ return ret;
+}
+
+#undef SKP_MUL_uint
+SKP_INLINE SKP_uint32 SKP_MUL_uint(SKP_uint32 a32, SKP_uint32 b32){
+ SKP_uint32 ret;
+ ret = a32 * b32;
+ SKP_assert((SKP_uint64)ret == (SKP_uint64)a32 * (SKP_uint64)b32); //Check output overflow
+ return ret;
+}
+#undef SKP_MLA
+SKP_INLINE SKP_int32 SKP_MLA(SKP_int32 a32, SKP_int32 b32, SKP_int32 c32){
+ SKP_int32 ret;
+ ret = a32 + b32 * c32;
+ SKP_assert((SKP_int64)ret == (SKP_int64)a32 + (SKP_int64)b32 * (SKP_int64)c32); //Check output overflow
+ return ret;
+}
+
+#undef SKP_MLA_uint
+SKP_INLINE SKP_int32 SKP_MLA_uint(SKP_uint32 a32, SKP_uint32 b32, SKP_uint32 c32){
+ SKP_uint32 ret;
+ ret = a32 + b32 * c32;
+ SKP_assert((SKP_int64)ret == (SKP_int64)a32 + (SKP_int64)b32 * (SKP_int64)c32); //Check output overflow
+ return ret;
+}
+
+#undef SKP_SMULWB
+SKP_INLINE SKP_int32 SKP_SMULWB(SKP_int32 a32, SKP_int32 b32){
+ SKP_int32 ret;
+ ret = (a32 >> 16) * (SKP_int32)((SKP_int16)b32) + (((a32 & 0x0000FFFF) * (SKP_int32)((SKP_int16)b32)) >> 16);
+ SKP_assert((SKP_int64)ret == ((SKP_int64)a32 * (SKP_int16)b32) >> 16);
+ return ret;
+}
+#undef SKP_SMLAWB
+SKP_INLINE SKP_int32 SKP_SMLAWB(SKP_int32 a32, SKP_int32 b32, SKP_int32 c32){
+ SKP_int32 ret;
+ ret = SKP_ADD32( a32, SKP_SMULWB( b32, c32 ) );
+ SKP_assert(SKP_ADD32( a32, SKP_SMULWB( b32, c32 ) ) == SKP_ADD_SAT32( a32, SKP_SMULWB( b32, c32 ) ));
+ return ret;
+}
+
+#undef SKP_SMULWT
+SKP_INLINE SKP_int32 SKP_SMULWT(SKP_int32 a32, SKP_int32 b32){
+ SKP_int32 ret;
+ ret = (a32 >> 16) * (b32 >> 16) + (((a32 & 0x0000FFFF) * (b32 >> 16)) >> 16);
+ SKP_assert((SKP_int64)ret == ((SKP_int64)a32 * (b32 >> 16)) >> 16);
+ return ret;
+}
+#undef SKP_SMLAWT
+SKP_INLINE SKP_int32 SKP_SMLAWT(SKP_int32 a32, SKP_int32 b32, SKP_int32 c32){
+ SKP_int32 ret;
+ ret = a32 + ((b32 >> 16) * (c32 >> 16)) + (((b32 & 0x0000FFFF) * ((c32 >> 16)) >> 16));
+ SKP_assert((SKP_int64)ret == (SKP_int64)a32 + (((SKP_int64)b32 * (c32 >> 16)) >> 16));
+ return ret;
+}
+
+#undef SKP_SMULL
+SKP_INLINE SKP_int64 SKP_SMULL(SKP_int64 a64, SKP_int64 b64){
+ SKP_int64 ret64;
+ ret64 = a64 * b64;
+ if( b64 != 0 ) {
+ SKP_assert( a64 == (ret64 / b64) );
+ } else if( a64 != 0 ) {
+ SKP_assert( b64 == (ret64 / a64) );
+ }
+ return ret64;
+}
+
+// no checking needed for SKP_SMULBB
+#undef SKP_SMLABB
+SKP_INLINE SKP_int32 SKP_SMLABB(SKP_int32 a32, SKP_int32 b32, SKP_int32 c32){
+ SKP_int32 ret;
+ ret = a32 + (SKP_int32)((SKP_int16)b32) * (SKP_int32)((SKP_int16)c32);
+ SKP_assert((SKP_int64)ret == (SKP_int64)a32 + (SKP_int64)b32 * (SKP_int16)c32);
+ return ret;
+}
+
+// no checking needed for SKP_SMULBT
+#undef SKP_SMLABT
+SKP_INLINE SKP_int32 SKP_SMLABT(SKP_int32 a32, SKP_int32 b32, SKP_int32 c32){
+ SKP_int32 ret;
+ ret = a32 + ((SKP_int32)((SKP_int16)b32)) * (c32 >> 16);
+ SKP_assert((SKP_int64)ret == (SKP_int64)a32 + (SKP_int64)b32 * (c32 >> 16));
+ return ret;
+}
+
+// no checking needed for SKP_SMULTT
+#undef SKP_SMLATT
+SKP_INLINE SKP_int32 SKP_SMLATT(SKP_int32 a32, SKP_int32 b32, SKP_int32 c32){
+ SKP_int32 ret;
+ ret = a32 + (b32 >> 16) * (c32 >> 16);
+ SKP_assert((SKP_int64)ret == (SKP_int64)a32 + (b32 >> 16) * (c32 >> 16));
+ return ret;
+}
+
+#undef SKP_SMULWW
+SKP_INLINE SKP_int32 SKP_SMULWW(SKP_int32 a32, SKP_int32 b32){
+ SKP_int32 ret, tmp1, tmp2;
+ SKP_int64 ret64;
+
+ ret = SKP_SMULWB( a32, b32 );
+ tmp1 = SKP_RSHIFT_ROUND( b32, 16 );
+ tmp2 = SKP_MUL( a32, tmp1 );
+
+ SKP_assert( (SKP_int64)tmp2 == (SKP_int64) a32 * (SKP_int64) tmp1 );
+
+ tmp1 = ret;
+ ret = SKP_ADD32( tmp1, tmp2 );
+ SKP_assert( SKP_ADD32( tmp1, tmp2 ) == SKP_ADD_SAT32( tmp1, tmp2 ) );
+
+ ret64 = SKP_RSHIFT64( SKP_SMULL( a32, b32 ), 16 );
+ SKP_assert( (SKP_int64)ret == ret64 );
+
+ return ret;
+}
+
+#undef SKP_SMLAWW
+SKP_INLINE SKP_int32 SKP_SMLAWW(SKP_int32 a32, SKP_int32 b32, SKP_int32 c32){
+ SKP_int32 ret, tmp;
+
+ tmp = SKP_SMULWW( b32, c32 );
+ ret = SKP_ADD32( a32, tmp );
+ SKP_assert( ret == SKP_ADD_SAT32( a32, tmp ) );
+ return ret;
+}
+
+// multiply-accumulate macros that allow overflow in the addition (ie, no asserts in debug mode)
+#undef SKP_MLA_ovflw
+#define SKP_MLA_ovflw(a32, b32, c32) ((a32) + ((b32) * (c32)))
+#undef SKP_SMLABB_ovflw
+#define SKP_SMLABB_ovflw(a32, b32, c32) ((a32) + ((SKP_int32)((SKP_int16)(b32))) * (SKP_int32)((SKP_int16)(c32)))
+#undef SKP_SMLABT_ovflw
+#define SKP_SMLABT_ovflw(a32, b32, c32) ((a32) + ((SKP_int32)((SKP_int16)(b32))) * ((c32) >> 16))
+#undef SKP_SMLATT_ovflw
+#define SKP_SMLATT_ovflw(a32, b32, c32) ((a32) + ((b32) >> 16) * ((c32) >> 16))
+#undef SKP_SMLAWB_ovflw
+#define SKP_SMLAWB_ovflw(a32, b32, c32) ((a32) + ((((b32) >> 16) * (SKP_int32)((SKP_int16)(c32))) + ((((b32) & 0x0000FFFF) * (SKP_int32)((SKP_int16)(c32))) >> 16)))
+#undef SKP_SMLAWT_ovflw
+#define SKP_SMLAWT_ovflw(a32, b32, c32) ((a32) + (((b32) >> 16) * ((c32) >> 16)) + ((((b32) & 0x0000FFFF) * ((c32) >> 16)) >> 16))
+
+// no checking needed for SKP_SMULL
+// no checking needed for SKP_SMLAL
+// no checking needed for SKP_SMLALBB
+// no checking needed for SigProcFIX_CLZ16
+// no checking needed for SigProcFIX_CLZ32
+
+#undef SKP_DIV32
+SKP_INLINE SKP_int32 SKP_DIV32(SKP_int32 a32, SKP_int32 b32){
+ SKP_assert( b32 != 0 );
+ return a32 / b32;
+}
+
+#undef SKP_DIV32_16
+SKP_INLINE SKP_int32 SKP_DIV32_16(SKP_int32 a32, SKP_int32 b32){
+ SKP_assert( b32 != 0 );
+ SKP_assert( b32 <= SKP_int16_MAX );
+ SKP_assert( b32 >= SKP_int16_MIN );
+ return a32 / b32;
+}
+
+// no checking needed for SKP_SAT8
+// no checking needed for SKP_SAT16
+// no checking needed for SKP_SAT32
+// no checking needed for SKP_POS_SAT32
+// no checking needed for SKP_ADD_POS_SAT8
+// no checking needed for SKP_ADD_POS_SAT16
+// no checking needed for SKP_ADD_POS_SAT32
+// no checking needed for SKP_ADD_POS_SAT64
+#undef SKP_LSHIFT8
+SKP_INLINE SKP_int8 SKP_LSHIFT8(SKP_int8 a, SKP_int32 shift){
+ SKP_int8 ret;
+ ret = a << shift;
+ SKP_assert(shift >= 0);
+ SKP_assert(shift < 8);
+ SKP_assert((SKP_int64)ret == ((SKP_int64)a) << shift);
+ return ret;
+}
+#undef SKP_LSHIFT16
+SKP_INLINE SKP_int16 SKP_LSHIFT16(SKP_int16 a, SKP_int32 shift){
+ SKP_int16 ret;
+ ret = a << shift;
+ SKP_assert(shift >= 0);
+ SKP_assert(shift < 16);
+ SKP_assert((SKP_int64)ret == ((SKP_int64)a) << shift);
+ return ret;
+}
+#undef SKP_LSHIFT32
+SKP_INLINE SKP_int32 SKP_LSHIFT32(SKP_int32 a, SKP_int32 shift){
+ SKP_int32 ret;
+ ret = a << shift;
+ SKP_assert(shift >= 0);
+ SKP_assert(shift < 32);
+ SKP_assert((SKP_int64)ret == ((SKP_int64)a) << shift);
+ return ret;
+}
+#undef SKP_LSHIFT64
+SKP_INLINE SKP_int64 SKP_LSHIFT64(SKP_int64 a, SKP_int shift){
+ SKP_assert(shift >= 0);
+ SKP_assert(shift < 64);
+ return a << shift;
+}
+
+#undef SKP_LSHIFT_ovflw
+SKP_INLINE SKP_int32 SKP_LSHIFT_ovflw(SKP_int32 a, SKP_int32 shift){
+ SKP_assert(shift >= 0); /* no check for overflow */
+ return a << shift;
+}
+
+#undef SKP_LSHIFT_uint
+SKP_INLINE SKP_uint32 SKP_LSHIFT_uint(SKP_uint32 a, SKP_int32 shift){
+ SKP_uint32 ret;
+ ret = a << shift;
+ SKP_assert(shift >= 0);
+ SKP_assert((SKP_int64)ret == ((SKP_int64)a) << shift);
+ return ret;
+}
+
+#undef SKP_RSHIFT8
+SKP_INLINE SKP_int8 SKP_RSHIFT8(SKP_int8 a, SKP_int32 shift){
+ SKP_assert(shift >= 0);
+ SKP_assert(shift < 8);
+ return a >> shift;
+}
+#undef SKP_RSHIFT16
+SKP_INLINE SKP_int16 SKP_RSHIFT16(SKP_int16 a, SKP_int32 shift){
+ SKP_assert(shift >= 0);
+ SKP_assert(shift < 16);
+ return a >> shift;
+}
+#undef SKP_RSHIFT32
+SKP_INLINE SKP_int32 SKP_RSHIFT32(SKP_int32 a, SKP_int32 shift){
+ SKP_assert(shift >= 0);
+ SKP_assert(shift < 32);
+ return a >> shift;
+}
+#undef SKP_RSHIFT64
+SKP_INLINE SKP_int64 SKP_RSHIFT64(SKP_int64 a, SKP_int64 shift){
+ SKP_assert(shift >= 0);
+ SKP_assert(shift <= 63);
+ return a >> shift;
+}
+
+#undef SKP_RSHIFT_uint
+SKP_INLINE SKP_uint32 SKP_RSHIFT_uint(SKP_uint32 a, SKP_int32 shift){
+ SKP_assert(shift >= 0);
+ SKP_assert(shift <= 32);
+ return a >> shift;
+}
+
+#undef SKP_ADD_LSHIFT
+SKP_INLINE SKP_int32 SKP_ADD_LSHIFT(SKP_int32 a, SKP_int32 b, SKP_int32 shift){
+ SKP_int32 ret;
+ SKP_assert(shift >= 0);
+ SKP_assert(shift <= 31);
+ ret = a + (b << shift);
+ SKP_assert((SKP_int64)ret == (SKP_int64)a + (((SKP_int64)b) << shift));
+ return ret; // shift >= 0
+}
+#undef SKP_ADD_LSHIFT32
+SKP_INLINE SKP_int32 SKP_ADD_LSHIFT32(SKP_int32 a, SKP_int32 b, SKP_int32 shift){
+ SKP_int32 ret;
+ SKP_assert(shift >= 0);
+ SKP_assert(shift <= 31);
+ ret = a + (b << shift);
+ SKP_assert((SKP_int64)ret == (SKP_int64)a + (((SKP_int64)b) << shift));
+ return ret; // shift >= 0
+}
+#undef SKP_ADD_LSHIFT_uint
+SKP_INLINE SKP_uint32 SKP_ADD_LSHIFT_uint(SKP_uint32 a, SKP_uint32 b, SKP_int32 shift){
+ SKP_uint32 ret;
+ SKP_assert(shift >= 0);
+ SKP_assert(shift <= 32);
+ ret = a + (b << shift);
+ SKP_assert((SKP_int64)ret == (SKP_int64)a + (((SKP_int64)b) << shift));
+ return ret; // shift >= 0
+}
+#undef SKP_ADD_RSHIFT
+SKP_INLINE SKP_int32 SKP_ADD_RSHIFT(SKP_int32 a, SKP_int32 b, SKP_int32 shift){
+ SKP_int32 ret;
+ SKP_assert(shift >= 0);
+ SKP_assert(shift <= 31);
+ ret = a + (b >> shift);
+ SKP_assert((SKP_int64)ret == (SKP_int64)a + (((SKP_int64)b) >> shift));
+ return ret; // shift > 0
+}
+#undef SKP_ADD_RSHIFT32
+SKP_INLINE SKP_int32 SKP_ADD_RSHIFT32(SKP_int32 a, SKP_int32 b, SKP_int32 shift){
+ SKP_int32 ret;
+ SKP_assert(shift >= 0);
+ SKP_assert(shift <= 31);
+ ret = a + (b >> shift);
+ SKP_assert((SKP_int64)ret == (SKP_int64)a + (((SKP_int64)b) >> shift));
+ return ret; // shift > 0
+}
+#undef SKP_ADD_RSHIFT_uint
+SKP_INLINE SKP_uint32 SKP_ADD_RSHIFT_uint(SKP_uint32 a, SKP_uint32 b, SKP_int32 shift){
+ SKP_uint32 ret;
+ SKP_assert(shift >= 0);
+ SKP_assert(shift <= 32);
+ ret = a + (b >> shift);
+ SKP_assert((SKP_int64)ret == (SKP_int64)a + (((SKP_int64)b) >> shift));
+ return ret; // shift > 0
+}
+#undef SKP_SUB_LSHIFT32
+SKP_INLINE SKP_int32 SKP_SUB_LSHIFT32(SKP_int32 a, SKP_int32 b, SKP_int32 shift){
+ SKP_int32 ret;
+ SKP_assert(shift >= 0);
+ SKP_assert(shift <= 31);
+ ret = a - (b << shift);
+ SKP_assert((SKP_int64)ret == (SKP_int64)a - (((SKP_int64)b) << shift));
+ return ret; // shift >= 0
+}
+#undef SKP_SUB_RSHIFT32
+SKP_INLINE SKP_int32 SKP_SUB_RSHIFT32(SKP_int32 a, SKP_int32 b, SKP_int32 shift){
+ SKP_int32 ret;
+ SKP_assert(shift >= 0);
+ SKP_assert(shift <= 31);
+ ret = a - (b >> shift);
+ SKP_assert((SKP_int64)ret == (SKP_int64)a - (((SKP_int64)b) >> shift));
+ return ret; // shift > 0
+}
+
+#undef SKP_RSHIFT_ROUND
+SKP_INLINE SKP_int32 SKP_RSHIFT_ROUND(SKP_int32 a, SKP_int32 shift){
+ SKP_int32 ret;
+ SKP_assert(shift > 0); /* the marco definition can't handle a shift of zero */
+ SKP_assert(shift < 32);
+ ret = shift == 1 ? (a >> 1) + (a & 1) : ((a >> (shift - 1)) + 1) >> 1;
+ SKP_assert((SKP_int64)ret == ((SKP_int64)a + ((SKP_int64)1 << (shift - 1))) >> shift);
+ return ret;
+}
+
+#undef SKP_RSHIFT_ROUND64
+SKP_INLINE SKP_int64 SKP_RSHIFT_ROUND64(SKP_int64 a, SKP_int32 shift){
+ SKP_int64 ret;
+ SKP_assert(shift > 0); /* the marco definition can't handle a shift of zero */
+ SKP_assert(shift < 64);
+ ret = shift == 1 ? (a >> 1) + (a & 1) : ((a >> (shift - 1)) + 1) >> 1;
+ return ret;
+}
+
+// SKP_abs is used on floats also, so doesn't work...
+//#undef SKP_abs
+//SKP_INLINE SKP_int32 SKP_abs(SKP_int32 a){
+// SKP_assert(a != 0x80000000);
+// return (((a) > 0) ? (a) : -(a)); // Be careful, SKP_abs returns wrong when input equals to SKP_intXX_MIN
+//}
+
+#undef SKP_abs_int64
+SKP_INLINE SKP_int64 SKP_abs_int64(SKP_int64 a){
+ SKP_assert(a != 0x8000000000000000);
+ return (((a) > 0) ? (a) : -(a)); // Be careful, SKP_abs returns wrong when input equals to SKP_intXX_MIN
+}
+
+#undef SKP_abs_int32
+SKP_INLINE SKP_int32 SKP_abs_int32(SKP_int32 a){
+ SKP_assert(a != 0x80000000);
+ return abs(a);
+}
+
+#undef SKP_CHECK_FIT8
+SKP_INLINE SKP_int8 SKP_CHECK_FIT8( SKP_int64 a ){
+ SKP_int8 ret;
+ ret = (SKP_int8)a;
+ SKP_assert( (SKP_int64)ret == a );
+ return( ret );
+}
+
+#undef SKP_CHECK_FIT16
+SKP_INLINE SKP_int16 SKP_CHECK_FIT16( SKP_int64 a ){
+ SKP_int16 ret;
+ ret = (SKP_int16)a;
+ SKP_assert( (SKP_int64)ret == a );
+ return( ret );
+}
+
+#undef SKP_CHECK_FIT32
+SKP_INLINE SKP_int32 SKP_CHECK_FIT32( SKP_int64 a ){
+ SKP_int32 ret;
+ ret = (SKP_int32)a;
+ SKP_assert( (SKP_int64)ret == a );
+ return( ret );
+}
+
+// no checking for SKP_NSHIFT_MUL_32_32
+// no checking for SKP_NSHIFT_MUL_16_16
+// no checking needed for SKP_min
+// no checking needed for SKP_max
+// no checking needed for SKP_sign
+
+#endif
+#endif
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_NLSF2A.c
@@ -1,0 +1,151 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* conversion between prediction filter coefficients and LSFs */
+/* order should be even */
+/* a piecewise linear approximation maps LSF <-> cos(LSF) */
+/* therefore the result is not accurate LSFs, but the two */
+/* function are accurate inverses of each other */
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* helper function for NLSF2A(..) */
+SKP_INLINE void SKP_Silk_NLSF2A_find_poly(
+ SKP_int32 *out, /* o intermediate polynomial, Q20 */
+ const SKP_int32 *cLSF, /* i vector of interleaved 2*cos(LSFs), Q20 */
+ SKP_int dd /* i polynomial order (= 1/2 * filter order) */
+)
+{
+ SKP_int k, n;
+ SKP_int32 ftmp;
+
+ out[0] = SKP_LSHIFT( 1, 20 );
+ out[1] = -cLSF[0];
+ for( k = 1; k < dd; k++ ) {
+ ftmp = cLSF[2*k]; // Q20
+ out[k+1] = SKP_LSHIFT( out[k-1], 1 ) - (SKP_int32)SKP_RSHIFT_ROUND64( SKP_SMULL( ftmp, out[k] ), 20 );
+ for( n = k; n > 1; n-- ) {
+ out[n] += out[n-2] - (SKP_int32)SKP_RSHIFT_ROUND64( SKP_SMULL( ftmp, out[n-1] ), 20 );
+ }
+ out[1] -= ftmp;
+ }
+}
+
+/* compute whitening filter coefficients from normalized line spectral frequencies */
+void SKP_Silk_NLSF2A(
+ SKP_int16 *a, /* o monic whitening filter coefficients in Q12, [d] */
+ const SKP_int16 *NLSF, /* i normalized line spectral frequencies in Q15, [d] */
+ const SKP_int d /* i filter order (should be even) */
+)
+{
+ SKP_int k, i, dd;
+ SKP_int32 cos_LSF_Q20[SKP_Silk_MAX_ORDER_LPC];
+ SKP_int32 P[SKP_Silk_MAX_ORDER_LPC/2+1], Q[SKP_Silk_MAX_ORDER_LPC/2+1];
+ SKP_int32 Ptmp, Qtmp;
+ SKP_int32 f_int;
+ SKP_int32 f_frac;
+ SKP_int32 cos_val, delta;
+ SKP_int32 a_int32[SKP_Silk_MAX_ORDER_LPC];
+ SKP_int32 maxabs, absval, idx=0, sc_Q16;
+
+ SKP_assert( LSF_COS_TAB_SZ_FIX == 128 );
+
+ /* convert LSFs to 2*cos(LSF(i)), using piecewise linear curve from table */
+ for( k = 0; k < d; k++ ) {
+ SKP_assert(NLSF[k] >= 0 );
+ SKP_assert(NLSF[k] <= 32767 );
+
+ /* f_int on a scale 0-127 (rounded down) */
+ f_int = SKP_RSHIFT( NLSF[k], 15 - 7 );
+
+ /* f_frac, range: 0..255 */
+ f_frac = NLSF[k] - SKP_LSHIFT( f_int, 15 - 7 );
+
+ SKP_assert(f_int >= 0);
+ SKP_assert(f_int < LSF_COS_TAB_SZ_FIX );
+
+ /* Read start and end value from table */
+ cos_val = SKP_Silk_LSFCosTab_FIX_Q12[ f_int ]; /* Q12 */
+ delta = SKP_Silk_LSFCosTab_FIX_Q12[ f_int + 1 ] - cos_val; /* Q12, with a range of 0..200 */
+
+ /* Linear interpolation */
+ cos_LSF_Q20[k] = SKP_LSHIFT( cos_val, 8 ) + SKP_MUL( delta, f_frac ); /* Q20 */
+ }
+
+ dd = SKP_RSHIFT( d, 1 );
+
+ /* generate even and odd polynomials using convolution */
+ SKP_Silk_NLSF2A_find_poly( P, &cos_LSF_Q20[0], dd );
+ SKP_Silk_NLSF2A_find_poly( Q, &cos_LSF_Q20[1], dd );
+
+ /* convert even and odd polynomials to SKP_int32 Q12 filter coefs */
+ for( k = 0; k < dd; k++ ) {
+ Ptmp = P[k+1] + P[k];
+ Qtmp = Q[k+1] - Q[k];
+
+ /* the Ptmp and Qtmp values at this stage need to fit in int32 */
+
+ a_int32[k] = -SKP_RSHIFT_ROUND( Ptmp + Qtmp, 9 ); /* Q20 -> Q12 */
+ a_int32[d-k-1] = SKP_RSHIFT_ROUND( Qtmp - Ptmp, 9 ); /* Q20 -> Q12 */
+ }
+
+ /* Limit the maximum absolute value of the prediction coefficients */
+ for( i = 0; i < 10; i++ ) {
+ /* Find maximum absolute value and its index */
+ maxabs = 0;
+ for( k = 0; k < d; k++ ) {
+ absval = SKP_abs( a_int32[k] );
+ if( absval > maxabs ) {
+ maxabs = absval;
+ idx = k;
+ }
+ }
+
+ if( maxabs > SKP_int16_MAX ) {
+ /* Reduce magnitude of prediction coefficients */
+ maxabs = SKP_min( maxabs, 98369 ); // ( SKP_int32_MAX / ( 65470 >> 2 ) ) + SKP_int16_MAX = 98369
+ sc_Q16 = 65470 - SKP_DIV32( SKP_MUL( 65470 >> 2, maxabs - SKP_int16_MAX ),
+ SKP_RSHIFT32( SKP_MUL( maxabs, idx + 1), 2 ) );
+ SKP_Silk_bwexpander_32( a_int32, d, sc_Q16 );
+ } else {
+ break;
+ }
+ }
+
+ /* Reached the last iteration */
+ if( i == 10 ) {
+ SKP_assert(0);
+ for( k = 0; k < d; k++ ) {
+ a_int32[k] = SKP_SAT16( a_int32[k] );
+ }
+ }
+
+ /* Return as SKP_int16 Q12 coefficients */
+ for( k = 0; k < d; k++ ) {
+ a[k] = (SKP_int16)a_int32[k];
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_NLSF_VQ_weights_laroia.c
@@ -1,0 +1,77 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+/*
+R. Laroia, N. Phamdo and N. Farvardin, "Robust and Efficient Quantization of Speech LSP
+Parameters Using Structured Vector Quantization", Proc. IEEE Int. Conf. Acoust., Speech,
+Signal Processing, pp. 641-644, 1991.
+*/
+
+#define Q_OUT 5
+
+/* Laroia low complexity NLSF weights */
+void SKP_Silk_NLSF_VQ_weights_laroia(
+ SKP_int16 *pNLSFW_Q5, /* O: Pointer to input vector weights [D x 1] */
+ const SKP_int16 *pNLSF_Q15, /* I: Pointer to input vector [D x 1] */
+ const SKP_int D /* I: Input vector dimension (even) */
+)
+{
+ SKP_int k;
+ SKP_int32 tmp1_int, tmp2_int;
+
+ SKP_assert( D > 0 );
+ SKP_assert( ( D & 1 ) == 0 );
+
+ /* First value */
+ tmp1_int = SKP_max_int( pNLSF_Q15[ 0 ], 1 );
+ tmp1_int = SKP_DIV32_16( 1 << ( 15 + Q_OUT ), tmp1_int );
+ tmp2_int = SKP_max_int( pNLSF_Q15[ 1 ] - pNLSF_Q15[ 0 ], 1 );
+ tmp2_int = SKP_DIV32_16( 1 << ( 15 + Q_OUT ), tmp2_int );
+ pNLSFW_Q5[ 0 ] = (SKP_int16)SKP_min_int( tmp1_int + tmp2_int, SKP_int16_MAX );
+ SKP_assert( pNLSFW_Q5[ 0 ] > 0 );
+
+ /* Main loop */
+ for( k = 1; k < D - 1; k += 2 ) {
+ tmp1_int = SKP_max_int( pNLSF_Q15[ k + 1 ] - pNLSF_Q15[ k ], 1 );
+ tmp1_int = SKP_DIV32_16( 1 << ( 15 + Q_OUT ), tmp1_int );
+ pNLSFW_Q5[ k ] = (SKP_int16)SKP_min_int( tmp1_int + tmp2_int, SKP_int16_MAX );
+ SKP_assert( pNLSFW_Q5[ k ] > 0 );
+
+ tmp2_int = SKP_max_int( pNLSF_Q15[ k + 2 ] - pNLSF_Q15[ k + 1 ], 1 );
+ tmp2_int = SKP_DIV32_16( 1 << ( 15 + Q_OUT ), tmp2_int );
+ pNLSFW_Q5[ k + 1 ] = (SKP_int16)SKP_min_int( tmp1_int + tmp2_int, SKP_int16_MAX );
+ SKP_assert( pNLSFW_Q5[ k + 1 ] > 0 );
+ }
+
+ /* Last value */
+ tmp1_int = SKP_max_int( ( 1 << 15 ) - pNLSF_Q15[ D - 1 ], 1 );
+ tmp1_int = SKP_DIV32_16( 1 << ( 15 + Q_OUT ), tmp1_int );
+ pNLSFW_Q5[ D - 1 ] = (SKP_int16)SKP_min_int( tmp1_int + tmp2_int, SKP_int16_MAX );
+ SKP_assert( pNLSFW_Q5[ D - 1 ] > 0 );
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_NLSF_stabilize.c
@@ -1,0 +1,138 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* NLSF stabilizer: */
+/* */
+/* - Moves NLSFs futher apart if they are too close */
+/* - Moves NLSFs away from borders if they are too close */
+/* - High effort to achieve a modification with minimum */
+/* Euclidean distance to input vector */
+/* - Output are sorted NLSF coefficients */
+/* */
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* Constant Definitions */
+#define MAX_LOOPS 20
+
+/* NLSF stabilizer, for a single input data vector */
+void SKP_Silk_NLSF_stabilize(
+ SKP_int16 *NLSF_Q15, /* I/O: Unstable/stabilized normalized LSF vector in Q15 [L] */
+ const SKP_int16 *NDeltaMin_Q15, /* I: Normalized delta min vector in Q15, NDeltaMin_Q15[L] must be >= 1 [L+1] */
+ const SKP_int L /* I: Number of NLSF parameters in the input vector */
+)
+{
+ SKP_int16 center_freq_Q15, diff_Q15, min_center_Q15, max_center_Q15;
+ SKP_int32 min_diff_Q15;
+ SKP_int loops;
+ SKP_int i, I=0, k;
+
+ /* This is necessary to ensure an output within range of a SKP_int16 */
+ SKP_assert( NDeltaMin_Q15[L] >= 1 );
+
+ for( loops = 0; loops < MAX_LOOPS; loops++ ) {
+ /**************************/
+ /* Find smallest distance */
+ /**************************/
+ /* First element */
+ min_diff_Q15 = NLSF_Q15[0] - NDeltaMin_Q15[0];
+ I = 0;
+ /* Middle elements */
+ for( i = 1; i <= L-1; i++ ) {
+ diff_Q15 = NLSF_Q15[i] - ( NLSF_Q15[i-1] + NDeltaMin_Q15[i] );
+ if( diff_Q15 < min_diff_Q15 ) {
+ min_diff_Q15 = diff_Q15;
+ I = i;
+ }
+ }
+ /* Last element */
+ diff_Q15 = (1<<15) - ( NLSF_Q15[L-1] + NDeltaMin_Q15[L] );
+ if( diff_Q15 < min_diff_Q15 ) {
+ min_diff_Q15 = diff_Q15;
+ I = L;
+ }
+
+ /***************************************************/
+ /* Now check if the smallest distance non-negative */
+ /***************************************************/
+ if (min_diff_Q15 >= 0) {
+ return;
+ }
+
+ if( I == 0 ) {
+ /* Move away from lower limit */
+ NLSF_Q15[0] = NDeltaMin_Q15[0];
+
+ } else if( I == L) {
+ /* Move away from higher limit */
+ NLSF_Q15[L-1] = (1<<15) - NDeltaMin_Q15[L];
+
+ } else {
+ /* Find the lower extreme for the location of the current center frequency */
+ min_center_Q15 = 0;
+ for( k = 0; k < I; k++ ) {
+ min_center_Q15 += NDeltaMin_Q15[k];
+ }
+ min_center_Q15 += SKP_RSHIFT( NDeltaMin_Q15[I], 1 );
+
+ /* Find the upper extreme for the location of the current center frequency */
+ max_center_Q15 = (1<<15);
+ for( k = L; k > I; k-- ) {
+ max_center_Q15 -= NDeltaMin_Q15[k];
+ }
+ max_center_Q15 -= ( NDeltaMin_Q15[I] - SKP_RSHIFT( NDeltaMin_Q15[I], 1 ) );
+
+ /* Move apart, sorted by value, keeping the same center frequency */
+ center_freq_Q15 = (SKP_int16)SKP_LIMIT_32( SKP_RSHIFT_ROUND( (SKP_int32)NLSF_Q15[I-1] + (SKP_int32)NLSF_Q15[I], 1 ),
+ min_center_Q15, max_center_Q15 );
+ NLSF_Q15[I-1] = center_freq_Q15 - SKP_RSHIFT( NDeltaMin_Q15[I], 1 );
+ NLSF_Q15[I] = NLSF_Q15[I-1] + NDeltaMin_Q15[I];
+ }
+ }
+
+ /* Safe and simple fall back method, which is less ideal than the above */
+ if( loops == MAX_LOOPS )
+ {
+ /* Insertion sort (fast for already almost sorted arrays): */
+ /* Best case: O(n) for an already sorted array */
+ /* Worst case: O(n^2) for an inversely sorted array */
+ SKP_Silk_insertion_sort_increasing_all_values_int16( &NLSF_Q15[0], L );
+
+ /* First NLSF should be no less than NDeltaMin[0] */
+ NLSF_Q15[0] = SKP_max_int( NLSF_Q15[0], NDeltaMin_Q15[0] );
+
+ /* Keep delta_min distance between the NLSFs */
+ for( i = 1; i < L; i++ )
+ NLSF_Q15[i] = SKP_max_int( NLSF_Q15[i], NLSF_Q15[i-1] + NDeltaMin_Q15[i] );
+
+ /* Last NLSF should be no higher than 1 - NDeltaMin[L] */
+ NLSF_Q15[L-1] = SKP_min_int( NLSF_Q15[L-1], (1<<15) - NDeltaMin_Q15[L] );
+
+ /* Keep NDeltaMin distance between the NLSFs */
+ for( i = L-2; i >= 0; i-- )
+ NLSF_Q15[i] = SKP_min_int( NLSF_Q15[i], NLSF_Q15[i+1] - NDeltaMin_Q15[i+1] );
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_SigProc_FIX.h
@@ -1,0 +1,671 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+
+#ifndef _SKP_SILK_SIGPROC_FIX_H_
+#define _SKP_SILK_SIGPROC_FIX_H_
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+//#define SKP_MACRO_COUNT /* Used to enable WMOPS counting */
+
+#define SKP_Silk_MAX_ORDER_LPC 16 /* max order of the LPC analysis in schur() and k2a() */
+#define SKP_Silk_MAX_CORRELATION_LENGTH 640 /* max input length to the correlation */
+#include "SKP_Silk_typedef.h"
+#include <string.h>
+#include <stdlib.h> /* for abs() */
+#include "SKP_Silk_resampler_structs.h"
+
+# include "SKP_Silk_macros.h"
+
+
+
+/********************************************************************/
+/* SIGNAL PROCESSING FUNCTIONS */
+/********************************************************************/
+
+/*!
+ * Initialize/reset the resampler state for a given pair of input/output sampling rates
+*/
+SKP_int SKP_Silk_resampler_init(
+ SKP_Silk_resampler_state_struct *S, /* I/O: Resampler state */
+ SKP_int32 Fs_Hz_in, /* I: Input sampling rate (Hz) */
+ SKP_int32 Fs_Hz_out /* I: Output sampling rate (Hz) */
+);
+
+
+/*!
+ * Clear the states of all resampling filters, without resetting sampling rate ratio
+ */
+SKP_int SKP_Silk_resampler_clear(
+ SKP_Silk_resampler_state_struct *S /* I/O: Resampler state */
+);
+
+/*!
+ * Resampler: convert from one sampling rate to another
+ */
+SKP_int SKP_Silk_resampler(
+ SKP_Silk_resampler_state_struct *S, /* I/O: Resampler state */
+ SKP_int16 out[], /* O: Output signal */
+ const SKP_int16 in[], /* I: Input signal */
+ SKP_int32 inLen /* I: Number of input samples */
+);
+
+/*!
+ Upsample 2x, low quality
+ */
+void SKP_Silk_resampler_up2(
+ SKP_int32 *S, /* I/O: State vector [ 2 ] */
+ SKP_int16 *out, /* O: Output signal [ 2 * len ] */
+ const SKP_int16 *in, /* I: Input signal [ len ] */
+ SKP_int32 len /* I: Number of input samples */
+);
+
+/*!
+* Downsample 2x, mediocre quality
+*/
+void SKP_Silk_resampler_down2(
+ SKP_int32 *S, /* I/O: State vector [ 2 ] */
+ SKP_int16 *out, /* O: Output signal [ len ] */
+ const SKP_int16 *in, /* I: Input signal [ floor(len/2) ] */
+ SKP_int32 inLen /* I: Number of input samples */
+);
+
+
+/*!
+ * Downsample by a factor 2/3, low quality
+*/
+void SKP_Silk_resampler_down2_3(
+ SKP_int32 *S, /* I/O: State vector [ 6 ] */
+ SKP_int16 *out, /* O: Output signal [ floor(2*inLen/3) ] */
+ const SKP_int16 *in, /* I: Input signal [ inLen ] */
+ SKP_int32 inLen /* I: Number of input samples */
+);
+
+/*!
+ * Downsample by a factor 3, low quality
+*/
+void SKP_Silk_resampler_down3(
+ SKP_int32 *S, /* I/O: State vector [ 8 ] */
+ SKP_int16 *out, /* O: Output signal [ floor(inLen/3) ] */
+ const SKP_int16 *in, /* I: Input signal [ inLen ] */
+ SKP_int32 inLen /* I: Number of input samples */
+);
+
+/*!
+ * second order ARMA filter;
+ * slower than biquad() but uses more precise coefficients
+ * can handle (slowly) varying coefficients
+ */
+void SKP_Silk_biquad_alt(
+ const SKP_int16 *in, /* I: input signal */
+ const SKP_int32 *B_Q28, /* I: MA coefficients [3] */
+ const SKP_int32 *A_Q28, /* I: AR coefficients [2] */
+ SKP_int32 *S, /* I/O: state vector [2] */
+ SKP_int16 *out, /* O: output signal */
+ const SKP_int32 len /* I: signal length (must be even) */
+);
+
+/*!
+ * variable order MA filter. Prediction error filter implementation. Coeficients negated and starting with coef to x[n - 1]
+ */
+void SKP_Silk_MA_Prediction(
+ const SKP_int16 *in, /* I: Input signal */
+ const SKP_int16 *B, /* I: MA prediction coefficients, Q12 [order] */
+ SKP_int32 *S, /* I/O: State vector [order] */
+ SKP_int16 *out, /* O: Output signal */
+ const SKP_int32 len, /* I: Signal length */
+ const SKP_int32 order /* I: Filter order */
+);
+
+/*!
+ * 16th order AR filter for LPC synthesis, coefficients are in Q12
+ */
+void SKP_Silk_LPC_synthesis_order16(
+ const SKP_int16 *in, /* I: excitation signal */
+ const SKP_int16 *A_Q12, /* I: AR coefficients [16], between -8_Q0 and 8_Q0 */
+ const SKP_int32 Gain_Q26, /* I: gain */
+ SKP_int32 *S, /* I/O: state vector [16] */
+ SKP_int16 *out, /* O: output signal */
+ const SKP_int32 len /* I: signal length, must be multiple of 16 */
+);
+
+/* variable order MA prediction error filter. */
+/* Inverse filter of SKP_Silk_LPC_synthesis_filter */
+void SKP_Silk_LPC_analysis_filter(
+ SKP_int16 *out, /* O: Output signal */
+ const SKP_int16 *in, /* I: Input signal */
+ const SKP_int16 *B, /* I: MA prediction coefficients, Q12 [order] */
+ const SKP_int32 len, /* I: Signal length */
+ const SKP_int32 Order /* I: Filter order */
+);
+
+/* even order AR filter */
+void SKP_Silk_LPC_synthesis_filter(
+ const SKP_int16 *in, /* I: excitation signal */
+ const SKP_int16 *A_Q12, /* I: AR coefficients [Order], between -8_Q0 and 8_Q0 */
+ const SKP_int32 Gain_Q26, /* I: gain */
+ SKP_int32 *S, /* I/O: state vector [Order] */
+ SKP_int16 *out, /* O: output signal */
+ const SKP_int32 len, /* I: signal length */
+ const SKP_int Order /* I: filter order, must be even */
+);
+
+/* Chirp (bandwidth expand) LP AR filter */
+void SKP_Silk_bwexpander(
+ SKP_int16 *ar, /* I/O AR filter to be expanded (without leading 1) */
+ const SKP_int d, /* I Length of ar */
+ SKP_int32 chirp_Q16 /* I Chirp factor (typically in the range 0 to 1) */
+);
+
+/* Chirp (bandwidth expand) LP AR filter */
+void SKP_Silk_bwexpander_32(
+ SKP_int32 *ar, /* I/O AR filter to be expanded (without leading 1) */
+ const SKP_int d, /* I Length of ar */
+ SKP_int32 chirp_Q16 /* I Chirp factor in Q16 */
+);
+
+/* Compute inverse of LPC prediction gain, and */
+/* test if LPC coefficients are stable (all poles within unit circle) */
+SKP_int SKP_Silk_LPC_inverse_pred_gain( /* O: Returns 1 if unstable, otherwise 0 */
+ SKP_int32 *invGain_Q30, /* O: Inverse prediction gain, Q30 energy domain */
+ const SKP_int16 *A_Q12, /* I: Prediction coefficients, Q12 [order] */
+ const SKP_int order /* I: Prediction order */
+);
+
+SKP_int SKP_Silk_LPC_inverse_pred_gain_Q24( /* O: Returns 1 if unstable, otherwise 0 */
+ SKP_int32 *invGain_Q30, /* O: Inverse prediction gain, Q30 energy domain */
+ const SKP_int32 *A_Q24, /* I: Prediction coefficients, Q24 [order] */
+ const SKP_int order /* I: Prediction order */
+);
+
+/* split signal in two decimated bands using first-order allpass filters */
+void SKP_Silk_ana_filt_bank_1(
+ const SKP_int16 *in, /* I: Input signal [N] */
+ SKP_int32 *S, /* I/O: State vector [2] */
+ SKP_int16 *outL, /* O: Low band [N/2] */
+ SKP_int16 *outH, /* O: High band [N/2] */
+ const SKP_int32 N /* I: Number of input samples */
+);
+
+/********************************************************************/
+/* SCALAR FUNCTIONS */
+/********************************************************************/
+
+/* approximation of 128 * log2() (exact inverse of approx 2^() below) */
+/* convert input to a log scale */
+SKP_int32 SKP_Silk_lin2log(const SKP_int32 inLin); /* I: input in linear scale */
+
+/* Approximation of a sigmoid function */
+SKP_int SKP_Silk_sigm_Q15(SKP_int in_Q5);
+
+/* approximation of 2^() (exact inverse of approx log2() above) */
+/* convert input to a linear scale */
+SKP_int32 SKP_Silk_log2lin(const SKP_int32 inLog_Q7); /* I: input on log scale */
+
+/* Function that returns the maximum absolut value of the input vector */
+SKP_int16 SKP_Silk_int16_array_maxabs( /* O Maximum absolute value, max: 2^15-1 */
+ const SKP_int16 *vec, /* I Input vector [len] */
+ const SKP_int32 len /* I Length of input vector */
+);
+
+/* Compute number of bits to right shift the sum of squares of a vector */
+/* of int16s to make it fit in an int32 */
+void SKP_Silk_sum_sqr_shift(
+ SKP_int32 *energy, /* O Energy of x, after shifting to the right */
+ SKP_int *shift, /* O Number of bits right shift applied to energy */
+ const SKP_int16 *x, /* I Input vector */
+ SKP_int len /* I Length of input vector */
+);
+
+/* Calculates the reflection coefficients from the correlation sequence */
+/* Faster than schur64(), but much less accurate. */
+/* uses SMLAWB(), requiring armv5E and higher. */
+SKP_int32 SKP_Silk_schur( /* O: Returns residual energy */
+ SKP_int16 *rc_Q15, /* O: reflection coefficients [order] Q15 */
+ const SKP_int32 *c, /* I: correlations [order+1] */
+ const SKP_int32 order /* I: prediction order */
+);;
+
+/* Calculates the reflection coefficients from the correlation sequence */
+/* Slower than schur(), but more accurate. */
+/* Uses SMULL(), available on armv4 */
+SKP_int32 SKP_Silk_schur64( /* O: returns residual energy */
+ SKP_int32 rc_Q16[], /* O: Reflection coefficients [order] Q16 */
+ const SKP_int32 c[], /* I: Correlations [order+1] */
+ SKP_int32 order /* I: Prediction order */
+);
+
+/* Step up function, converts reflection coefficients to prediction coefficients */
+void SKP_Silk_k2a(
+ SKP_int32 *A_Q24, /* O: Prediction coefficients [order] Q24 */
+ const SKP_int16 *rc_Q15, /* I: Reflection coefficients [order] Q15 */
+ const SKP_int32 order /* I: Prediction order */
+);
+
+/* Step up function, converts reflection coefficients to prediction coefficients */
+void SKP_Silk_k2a_Q16(
+ SKP_int32 *A_Q24, /* O: Prediction coefficients [order] Q24 */
+ const SKP_int32 *rc_Q16, /* I: Reflection coefficients [order] Q16 */
+ const SKP_int32 order /* I: Prediction order */
+);
+
+/* Apply sine window to signal vector. */
+/* Window types: */
+/* 1 -> sine window from 0 to pi/2 */
+/* 2 -> sine window from pi/2 to pi */
+/* every other sample of window is linearly interpolated, for speed */
+void SKP_Silk_apply_sine_window(
+ SKP_int16 px_win[], /* O Pointer to windowed signal */
+ const SKP_int16 px[], /* I Pointer to input signal */
+ const SKP_int win_type, /* I Selects a window type */
+ const SKP_int length /* I Window length, multiple of 4 */
+);
+
+/* Compute autocorrelation */
+void SKP_Silk_autocorr(
+ SKP_int32 *results, /* O Result (length correlationCount) */
+ SKP_int *scale, /* O Scaling of the correlation vector */
+ const SKP_int16 *inputData, /* I Input data to correlate */
+ const SKP_int inputDataSize, /* I Length of input */
+ const SKP_int correlationCount /* I Number of correlation taps to compute */
+);
+
+/* Pitch estimator */
+#define SKP_Silk_PE_MIN_COMPLEX 0
+#define SKP_Silk_PE_MID_COMPLEX 1
+#define SKP_Silk_PE_MAX_COMPLEX 2
+
+void SKP_Silk_decode_pitch(
+ SKP_int16 lagIndex, /* I */
+ SKP_int8 contourIndex, /* O */
+ SKP_int pitch_lags[], /* O 4 pitch values */
+ const SKP_int Fs_kHz, /* I sampling frequency (kHz) */
+ const SKP_int nb_subfr /* I number of sub frames */
+);
+
+SKP_int SKP_Silk_pitch_analysis_core( /* O Voicing estimate: 0 voiced, 1 unvoiced */
+ const SKP_int16 *signal, /* I Signal of length PE_FRAME_LENGTH_MS*Fs_kHz */
+ SKP_int *pitch_out, /* O 4 pitch lag values */
+ SKP_int16 *lagIndex, /* O Lag Index */
+ SKP_int8 *contourIndex, /* O Pitch contour Index */
+ SKP_int *LTPCorr_Q15, /* I/O Normalized correlation; input: value from previous frame */
+ SKP_int prevLag, /* I Last lag of previous frame; set to zero is unvoiced */
+ const SKP_int32 search_thres1_Q16, /* I First stage threshold for lag candidates 0 - 1 */
+ const SKP_int search_thres2_Q15, /* I Final threshold for lag candidates 0 - 1 */
+ const SKP_int Fs_kHz, /* I Sample frequency (kHz) */
+ const SKP_int complexity, /* I Complexity setting, 0-2, where 2 is highest */
+ const SKP_int nb_subfr /* I number of 5 ms subframes */
+);
+
+/* parameter defining the size and accuracy of the piecewise linear */
+/* cosine approximatin table. */
+
+#define LSF_COS_TAB_SZ_FIX 128
+/* rom table with cosine values */
+extern const SKP_int SKP_Silk_LSFCosTab_FIX_Q12[ LSF_COS_TAB_SZ_FIX + 1 ];
+
+void SKP_Silk_LPC_fit(
+ SKP_int16 *a_QQ, /* O stabilized LPC vector, Q(24-rshift) [L] */
+ SKP_int32 *a_Q24, /* I LPC vector [L] */
+ const SKP_int QQ, /* I Q domain of output LPC vector */
+ const SKP_int L /* I Number of LPC parameters in the input vector */
+);
+
+/* Compute Normalized Line Spectral Frequencies (NLSFs) from whitening filter coefficients */
+/* If not all roots are found, the a_Q16 coefficients are bandwidth expanded until convergence. */
+void SKP_Silk_A2NLSF(
+ SKP_int16 *NLSF, /* O Normalized Line Spectral Frequencies, Q15 (0 - (2^15-1)), [d] */
+ SKP_int32 *a_Q16, /* I/O Monic whitening filter coefficients in Q16 [d] */
+ const SKP_int d /* I Filter order (must be even) */
+);
+
+/* compute whitening filter coefficients from normalized line spectral frequencies */
+void SKP_Silk_NLSF2A(
+ SKP_int16 *a, /* o monic whitening filter coefficients in Q12, [d] */
+ const SKP_int16 *NLSF, /* i normalized line spectral frequencies in Q15, [d] */
+ const SKP_int d /* i filter order (should be even) */
+);
+
+void SKP_Silk_insertion_sort_increasing(
+ SKP_int32 *a, /* I/O Unsorted / Sorted vector */
+ SKP_int *index, /* O: Index vector for the sorted elements */
+ const SKP_int L, /* I: Vector length */
+ const SKP_int K /* I: Number of correctly sorted positions */
+);
+
+void SKP_Silk_insertion_sort_decreasing_int16(
+ SKP_int16 *a, /* I/O: Unsorted / Sorted vector */
+ SKP_int *index, /* O: Index vector for the sorted elements */
+ const SKP_int L, /* I: Vector length */
+ const SKP_int K /* I: Number of correctly sorted positions */
+);
+
+void SKP_Silk_insertion_sort_increasing_all_values_int16(
+ SKP_int16 *a, /* I/O: Unsorted / Sorted vector */
+ const SKP_int L /* I: Vector length */
+);
+
+/* NLSF stabilizer, for a single input data vector */
+void SKP_Silk_NLSF_stabilize(
+ SKP_int16 *NLSF_Q15, /* I/O: Unstable/stabilized normalized LSF vector in Q15 [L] */
+ const SKP_int16 *NDeltaMin_Q15, /* I: Normalized delta min vector in Q15, NDeltaMin_Q15[L] must be >= 1 [L+1] */
+ const SKP_int L /* I: Number of NLSF parameters in the input vector */
+);
+
+/* Laroia low complexity NLSF weights */
+void SKP_Silk_NLSF_VQ_weights_laroia(
+ SKP_int16 *pNLSFW_Q5, /* O: Pointer to input vector weights [D x 1] */
+ const SKP_int16 *pNLSF_Q15, /* I: Pointer to input vector [D x 1] */
+ const SKP_int D /* I: Input vector dimension (even) */
+);
+
+/* Compute reflection coefficients from input signal */
+void SKP_Silk_burg_modified(
+ SKP_int32 *res_nrg, /* O residual energy */
+ SKP_int *res_nrgQ, /* O residual energy Q value */
+ SKP_int32 A_Q16[], /* O prediction coefficients (length order) */
+ const SKP_int16 x[], /* I input signal, length: nb_subfr * ( D + subfr_length ) */
+ const SKP_int subfr_length, /* I input signal subframe length (including D preceeding samples) */
+ const SKP_int nb_subfr, /* I number of subframes stacked in x */
+ const SKP_int32 WhiteNoiseFrac_Q32, /* I fraction added to zero-lag autocorrelation */
+ const SKP_int D /* I order */
+);
+
+/* Copy and multiply a vector by a constant */
+void SKP_Silk_scale_copy_vector16(
+ SKP_int16 *data_out,
+ const SKP_int16 *data_in,
+ SKP_int32 gain_Q16, /* I: gain in Q16 */
+ const SKP_int dataSize /* I: length */
+);
+
+/* Some for the LTP related function requires Q26 to work.*/
+void SKP_Silk_scale_vector32_Q26_lshift_18(
+ SKP_int32 *data1, /* I/O: Q0/Q18 */
+ SKP_int32 gain_Q26, /* I: Q26 */
+ SKP_int dataSize /* I: length */
+);
+
+/********************************************************************/
+/* INLINE ARM MATH */
+/********************************************************************/
+
+/* return sum(inVec1[i]*inVec2[i]) */
+SKP_int32 SKP_Silk_inner_prod_aligned(
+ const SKP_int16 *const inVec1, /* I input vector 1 */
+ const SKP_int16 *const inVec2, /* I input vector 2 */
+ const SKP_int len /* I vector lengths */
+);
+
+SKP_int32 SKP_Silk_inner_prod_aligned_scale(
+ const SKP_int16 *const inVec1, /* I input vector 1 */
+ const SKP_int16 *const inVec2, /* I input vector 2 */
+ const SKP_int scale, /* I number of bits to shift */
+ const SKP_int len /* I vector lengths */
+);
+
+SKP_int64 SKP_Silk_inner_prod16_aligned_64(
+ const SKP_int16 *inVec1, /* I input vector 1 */
+ const SKP_int16 *inVec2, /* I input vector 2 */
+ const SKP_int len /* I vector lengths */
+);
+
+/********************************************************************/
+/* MACROS */
+/********************************************************************/
+
+/* Rotate a32 right by 'rot' bits. Negative rot values result in rotating
+ left. Output is 32bit int.
+ Note: contemporary compilers recognize the C expression below and
+ compile it into a 'ror' instruction if available. No need for inline ASM! */
+SKP_INLINE SKP_int32 SKP_ROR32( SKP_int32 a32, SKP_int rot )
+{
+ SKP_uint32 x = (SKP_uint32) a32;
+ SKP_uint32 r = (SKP_uint32) rot;
+ SKP_uint32 m = (SKP_uint32) -rot;
+ if(rot <= 0)
+ return (SKP_int32) ((x << m) | (x >> (32 - m)));
+ else
+ return (SKP_int32) ((x << (32 - r)) | (x >> r));
+}
+
+/* Allocate SKP_int16 alligned to 4-byte memory address */
+#if EMBEDDED_ARM
+#define SKP_DWORD_ALIGN __attribute__((aligned(4)))
+#else
+#define SKP_DWORD_ALIGN
+#endif
+
+/* Useful Macros that can be adjusted to other platforms */
+#define SKP_memcpy(a, b, c) memcpy((a), (b), (c)) /* Dest, Src, ByteCount */
+#define SKP_memset(a, b, c) memset((a), (b), (c)) /* Dest, value, ByteCount */
+#define SKP_memmove(a, b, c) memmove((a), (b), (c)) /* Dest, Src, ByteCount */
+/* fixed point macros */
+
+// (a32 * b32) output have to be 32bit int
+#define SKP_MUL(a32, b32) ((a32) * (b32))
+
+// (a32 * b32) output have to be 32bit uint
+#define SKP_MUL_uint(a32, b32) SKP_MUL(a32, b32)
+
+// a32 + (b32 * c32) output have to be 32bit int
+#define SKP_MLA(a32, b32, c32) SKP_ADD32((a32),((b32) * (c32)))
+
+// a32 + (b32 * c32) output have to be 32bit uint
+#define SKP_MLA_uint(a32, b32, c32) SKP_MLA(a32, b32, c32)
+
+// ((a32 >> 16) * (b32 >> 16)) output have to be 32bit int
+#define SKP_SMULTT(a32, b32) (((a32) >> 16) * ((b32) >> 16))
+
+// a32 + ((a32 >> 16) * (b32 >> 16)) output have to be 32bit int
+#define SKP_SMLATT(a32, b32, c32) SKP_ADD32((a32),((b32) >> 16) * ((c32) >> 16))
+
+#define SKP_SMLALBB(a64, b16, c16) SKP_ADD64((a64),(SKP_int64)((SKP_int32)(b16) * (SKP_int32)(c16)))
+
+// (a32 * b32)
+#define SKP_SMULL(a32, b32) ((SKP_int64)(a32) * /*(SKP_int64)*/(b32))
+
+// multiply-accumulate macros that allow overflow in the addition (ie, no asserts in debug mode)
+#define SKP_MLA_ovflw(a32, b32, c32) SKP_MLA(a32, b32, c32)
+#ifndef SKP_SMLABB_ovflw
+# define SKP_SMLABB_ovflw(a32, b32, c32) SKP_SMLABB(a32, b32, c32)
+#endif
+#define SKP_SMLABT_ovflw(a32, b32, c32) SKP_SMLABT(a32, b32, c32)
+#define SKP_SMLATT_ovflw(a32, b32, c32) SKP_SMLATT(a32, b32, c32)
+#define SKP_SMLAWB_ovflw(a32, b32, c32) SKP_SMLAWB(a32, b32, c32)
+#define SKP_SMLAWT_ovflw(a32, b32, c32) SKP_SMLAWT(a32, b32, c32)
+
+#define SKP_DIV32_16(a32, b16) ((SKP_int32)((a32) / (b16)))
+#define SKP_DIV32(a32, b32) ((SKP_int32)((a32) / (b32)))
+
+// These macros enables checking for overflow in SKP_Silk_API_Debug.h
+#define SKP_ADD16(a, b) ((a) + (b))
+#define SKP_ADD32(a, b) ((a) + (b))
+#define SKP_ADD64(a, b) ((a) + (b))
+
+#define SKP_SUB16(a, b) ((a) - (b))
+#define SKP_SUB32(a, b) ((a) - (b))
+#define SKP_SUB64(a, b) ((a) - (b))
+
+#define SKP_SAT8(a) ((a) > SKP_int8_MAX ? SKP_int8_MAX : \
+ ((a) < SKP_int8_MIN ? SKP_int8_MIN : (a)))
+#define SKP_SAT16(a) ((a) > SKP_int16_MAX ? SKP_int16_MAX : \
+ ((a) < SKP_int16_MIN ? SKP_int16_MIN : (a)))
+#define SKP_SAT32(a) ((a) > SKP_int32_MAX ? SKP_int32_MAX : \
+ ((a) < SKP_int32_MIN ? SKP_int32_MIN : (a)))
+
+#define SKP_CHECK_FIT8(a) (a)
+#define SKP_CHECK_FIT16(a) (a)
+#define SKP_CHECK_FIT32(a) (a)
+
+#define SKP_ADD_SAT16(a, b) (SKP_int16)SKP_SAT16( SKP_ADD32( (SKP_int32)(a), (b) ) )
+#define SKP_ADD_SAT64(a, b) ((((a) + (b)) & 0x8000000000000000LL) == 0 ? \
+ ((((a) & (b)) & 0x8000000000000000LL) != 0 ? SKP_int64_MIN : (a)+(b)) : \
+ ((((a) | (b)) & 0x8000000000000000LL) == 0 ? SKP_int64_MAX : (a)+(b)) )
+
+#define SKP_SUB_SAT16(a, b) (SKP_int16)SKP_SAT16( SKP_SUB32( (SKP_int32)(a), (b) ) )
+#define SKP_SUB_SAT64(a, b) ((((a)-(b)) & 0x8000000000000000LL) == 0 ? \
+ (( (a) & ((b)^0x8000000000000000LL) & 0x8000000000000000LL) ? SKP_int64_MIN : (a)-(b)) : \
+ ((((a)^0x8000000000000000LL) & (b) & 0x8000000000000000LL) ? SKP_int64_MAX : (a)-(b)) )
+
+/* Saturation for positive input values */
+#define SKP_POS_SAT32(a) ((a) > SKP_int32_MAX ? SKP_int32_MAX : (a))
+
+/* Add with saturation for positive input values */
+#define SKP_ADD_POS_SAT8(a, b) ((((a)+(b)) & 0x80) ? SKP_int8_MAX : ((a)+(b)))
+#define SKP_ADD_POS_SAT16(a, b) ((((a)+(b)) & 0x8000) ? SKP_int16_MAX : ((a)+(b)))
+#define SKP_ADD_POS_SAT32(a, b) ((((a)+(b)) & 0x80000000) ? SKP_int32_MAX : ((a)+(b)))
+#define SKP_ADD_POS_SAT64(a, b) ((((a)+(b)) & 0x8000000000000000LL) ? SKP_int64_MAX : ((a)+(b)))
+
+#define SKP_LSHIFT8(a, shift) ((a)<<(shift)) // shift >= 0, shift < 8
+#define SKP_LSHIFT16(a, shift) ((a)<<(shift)) // shift >= 0, shift < 16
+#define SKP_LSHIFT32(a, shift) ((a)<<(shift)) // shift >= 0, shift < 32
+#define SKP_LSHIFT64(a, shift) ((a)<<(shift)) // shift >= 0, shift < 64
+#define SKP_LSHIFT(a, shift) SKP_LSHIFT32(a, shift) // shift >= 0, shift < 32
+
+#define SKP_RSHIFT8(a, shift) ((a)>>(shift)) // shift >= 0, shift < 8
+#define SKP_RSHIFT16(a, shift) ((a)>>(shift)) // shift >= 0, shift < 16
+#define SKP_RSHIFT32(a, shift) ((a)>>(shift)) // shift >= 0, shift < 32
+#define SKP_RSHIFT64(a, shift) ((a)>>(shift)) // shift >= 0, shift < 64
+#define SKP_RSHIFT(a, shift) SKP_RSHIFT32(a, shift) // shift >= 0, shift < 32
+
+/* saturates before shifting */
+#define SKP_LSHIFT_SAT16(a, shift) (SKP_LSHIFT16( SKP_LIMIT( (a), SKP_RSHIFT16( SKP_int16_MIN, (shift) ), \
+ SKP_RSHIFT16( SKP_int16_MAX, (shift) ) ), (shift) ))
+#define SKP_LSHIFT_SAT32(a, shift) (SKP_LSHIFT32( SKP_LIMIT( (a), SKP_RSHIFT32( SKP_int32_MIN, (shift) ), \
+ SKP_RSHIFT32( SKP_int32_MAX, (shift) ) ), (shift) ))
+
+#define SKP_LSHIFT_ovflw(a, shift) ((a)<<(shift)) // shift >= 0, allowed to overflow
+#define SKP_LSHIFT_uint(a, shift) ((a)<<(shift)) // shift >= 0
+#define SKP_RSHIFT_uint(a, shift) ((a)>>(shift)) // shift >= 0
+
+#define SKP_ADD_LSHIFT(a, b, shift) ((a) + SKP_LSHIFT((b), (shift))) // shift >= 0
+#define SKP_ADD_LSHIFT32(a, b, shift) SKP_ADD32((a), SKP_LSHIFT32((b), (shift))) // shift >= 0
+#define SKP_ADD_LSHIFT_uint(a, b, shift) ((a) + SKP_LSHIFT_uint((b), (shift))) // shift >= 0
+#define SKP_ADD_RSHIFT(a, b, shift) ((a) + SKP_RSHIFT((b), (shift))) // shift >= 0
+#define SKP_ADD_RSHIFT32(a, b, shift) SKP_ADD32((a), SKP_RSHIFT32((b), (shift))) // shift >= 0
+#define SKP_ADD_RSHIFT_uint(a, b, shift) ((a) + SKP_RSHIFT_uint((b), (shift))) // shift >= 0
+#define SKP_SUB_LSHIFT32(a, b, shift) SKP_SUB32((a), SKP_LSHIFT32((b), (shift))) // shift >= 0
+#define SKP_SUB_RSHIFT32(a, b, shift) SKP_SUB32((a), SKP_RSHIFT32((b), (shift))) // shift >= 0
+
+/* Requires that shift > 0 */
+#define SKP_RSHIFT_ROUND(a, shift) ((shift) == 1 ? ((a) >> 1) + ((a) & 1) : (((a) >> ((shift) - 1)) + 1) >> 1)
+#define SKP_RSHIFT_ROUND64(a, shift) ((shift) == 1 ? ((a) >> 1) + ((a) & 1) : (((a) >> ((shift) - 1)) + 1) >> 1)
+
+/* Number of rightshift required to fit the multiplication */
+#define SKP_NSHIFT_MUL_32_32(a, b) ( -(31- (32-SKP_Silk_CLZ32(SKP_abs(a)) + (32-SKP_Silk_CLZ32(SKP_abs(b))))) )
+#define SKP_NSHIFT_MUL_16_16(a, b) ( -(15- (16-SKP_Silk_CLZ16(SKP_abs(a)) + (16-SKP_Silk_CLZ16(SKP_abs(b))))) )
+
+
+#define SKP_min(a, b) (((a) < (b)) ? (a) : (b))
+#define SKP_max(a, b) (((a) > (b)) ? (a) : (b))
+
+/* Macro to convert floating-point constants to fixed-point */
+#define SKP_FIX_CONST( C, Q ) ((SKP_int32)((C) * ((SKP_int64)1 << (Q)) + 0.5))
+
+/* SKP_min() versions with typecast in the function call */
+SKP_INLINE SKP_int SKP_min_int(SKP_int a, SKP_int b)
+{
+ return (((a) < (b)) ? (a) : (b));
+}
+SKP_INLINE SKP_int16 SKP_min_16(SKP_int16 a, SKP_int16 b)
+{
+ return (((a) < (b)) ? (a) : (b));
+}
+SKP_INLINE SKP_int32 SKP_min_32(SKP_int32 a, SKP_int32 b)
+{
+ return (((a) < (b)) ? (a) : (b));
+}
+SKP_INLINE SKP_int64 SKP_min_64(SKP_int64 a, SKP_int64 b)
+{
+ return (((a) < (b)) ? (a) : (b));
+}
+
+/* SKP_min() versions with typecast in the function call */
+SKP_INLINE SKP_int SKP_max_int(SKP_int a, SKP_int b)
+{
+ return (((a) > (b)) ? (a) : (b));
+}
+SKP_INLINE SKP_int16 SKP_max_16(SKP_int16 a, SKP_int16 b)
+{
+ return (((a) > (b)) ? (a) : (b));
+}
+SKP_INLINE SKP_int32 SKP_max_32(SKP_int32 a, SKP_int32 b)
+{
+ return (((a) > (b)) ? (a) : (b));
+}
+SKP_INLINE SKP_int64 SKP_max_64(SKP_int64 a, SKP_int64 b)
+{
+ return (((a) > (b)) ? (a) : (b));
+}
+
+#define SKP_LIMIT( a, limit1, limit2) ((limit1) > (limit2) ? ((a) > (limit1) ? (limit1) : ((a) < (limit2) ? (limit2) : (a))) \
+ : ((a) > (limit2) ? (limit2) : ((a) < (limit1) ? (limit1) : (a))))
+
+#define SKP_LIMIT_int SKP_LIMIT
+#define SKP_LIMIT_16 SKP_LIMIT
+#define SKP_LIMIT_32 SKP_LIMIT
+
+//#define SKP_non_neg(a) ((a) & ((-(a)) >> (8 * sizeof(a) - 1))) /* doesn't seem faster than SKP_max(0, a);
+
+#define SKP_abs(a) (((a) > 0) ? (a) : -(a)) // Be careful, SKP_abs returns wrong when input equals to SKP_intXX_MIN
+#define SKP_abs_int(a) (((a) ^ ((a) >> (8 * sizeof(a) - 1))) - ((a) >> (8 * sizeof(a) - 1)))
+#define SKP_abs_int32(a) (((a) ^ ((a) >> 31)) - ((a) >> 31))
+#define SKP_abs_int64(a) (((a) > 0) ? (a) : -(a))
+
+#define SKP_sign(a) ((a) > 0 ? 1 : ( (a) < 0 ? -1 : 0 ))
+
+#define SKP_sqrt(a) (sqrt(a))
+
+/* PSEUDO-RANDOM GENERATOR */
+/* Make sure to store the result as the seed for the next call (also in between */
+/* frames), otherwise result won't be random at all. When only using some of the */
+/* bits, take the most significant bits by right-shifting. */
+#define SKP_RAND(seed) (SKP_MLA_ovflw(907633515, (seed), 196314165))
+
+// Add some multiplication functions that can be easily mapped to ARM.
+
+// SKP_SMMUL: Signed top word multiply.
+// ARMv6 2 instruction cycles.
+// ARMv3M+ 3 instruction cycles. use SMULL and ignore LSB registers.(except xM)
+//#define SKP_SMMUL(a32, b32) (SKP_int32)SKP_RSHIFT(SKP_SMLAL(SKP_SMULWB((a32), (b32)), (a32), SKP_RSHIFT_ROUND((b32), 16)), 16)
+// the following seems faster on x86
+#define SKP_SMMUL(a32, b32) (SKP_int32)SKP_RSHIFT64(SKP_SMULL((a32), (b32)), 32)
+
+#include "SKP_Silk_Inlines.h"
+#include "SKP_Silk_MacroCount.h"
+#include "SKP_Silk_MacroDebug.h"
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_ana_filt_bank_1.c
@@ -1,0 +1,79 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_ana_filt_bank_1.c *
+ * *
+ * Split signal into two decimated bands using first-order allpass filters *
+ * *
+ * Copyright 2006 (c), Skype Limited *
+ * Date: 060221 *
+ * */
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* Coefficients for 2-band filter bank based on first-order allpass filters */
+// old
+static SKP_int16 A_fb1_20[ 1 ] = { 5394 << 1 };
+static SKP_int16 A_fb1_21[ 1 ] = { 20623 << 1 }; /* wrap-around to negative number is intentional */
+
+/* Split signal into two decimated bands using first-order allpass filters */
+void SKP_Silk_ana_filt_bank_1(
+ const SKP_int16 *in, /* I: Input signal [N] */
+ SKP_int32 *S, /* I/O: State vector [2] */
+ SKP_int16 *outL, /* O: Low band [N/2] */
+ SKP_int16 *outH, /* O: High band [N/2] */
+ const SKP_int32 N /* I: Number of input samples */
+)
+{
+ SKP_int k, N2 = SKP_RSHIFT( N, 1 );
+ SKP_int32 in32, X, Y, out_1, out_2;
+
+ /* Internal variables and state are in Q10 format */
+ for( k = 0; k < N2; k++ ) {
+ /* Convert to Q10 */
+ in32 = SKP_LSHIFT( (SKP_int32)in[ 2 * k ], 10 );
+
+ /* All-pass section for even input sample */
+ Y = SKP_SUB32( in32, S[ 0 ] );
+ X = SKP_SMLAWB( Y, Y, A_fb1_21[ 0 ] );
+ out_1 = SKP_ADD32( S[ 0 ], X );
+ S[ 0 ] = SKP_ADD32( in32, X );
+
+ /* Convert to Q10 */
+ in32 = SKP_LSHIFT( (SKP_int32)in[ 2 * k + 1 ], 10 );
+
+ /* All-pass section for odd input sample, and add to output of previous section */
+ Y = SKP_SUB32( in32, S[ 1 ] );
+ X = SKP_SMULWB( Y, A_fb1_20[ 0 ] );
+ out_2 = SKP_ADD32( S[ 1 ], X );
+ S[ 1 ] = SKP_ADD32( in32, X );
+
+ /* Add/subtract, convert back to int16 and store to output */
+ outL[ k ] = (SKP_int16)SKP_SAT16( SKP_RSHIFT_ROUND( SKP_ADD32( out_2, out_1 ), 11 ) );
+ outH[ k ] = (SKP_int16)SKP_SAT16( SKP_RSHIFT_ROUND( SKP_SUB32( out_2, out_1 ), 11 ) );
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_apply_sine_window.c
@@ -1,0 +1,97 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* Apply sine window to signal vector. */
+/* Window types: */
+/* 1 -> sine window from 0 to pi/2 */
+/* 2 -> sine window from pi/2 to pi */
+/* Every other sample is linearly interpolated, for speed. */
+/* Window length must be between 16 and 120 (incl) and a multiple of 4. */
+
+/* Matlab code for table:
+ for k=16:9*4:16+2*9*4, fprintf(' %7.d,', -round(65536*pi ./ (k:4:k+8*4))); fprintf('\n'); end
+*/
+static SKP_int16 freq_table_Q16[ 27 ] = {
+ 12111, 9804, 8235, 7100, 6239, 5565, 5022, 4575, 4202,
+ 3885, 3612, 3375, 3167, 2984, 2820, 2674, 2542, 2422,
+ 2313, 2214, 2123, 2038, 1961, 1889, 1822, 1760, 1702,
+};
+
+void SKP_Silk_apply_sine_window(
+ SKP_int16 px_win[], /* O Pointer to windowed signal */
+ const SKP_int16 px[], /* I Pointer to input signal */
+ const SKP_int win_type, /* I Selects a window type */
+ const SKP_int length /* I Window length, multiple of 4 */
+)
+{
+ SKP_int k, f_Q16, c_Q16;
+ SKP_int32 S0_Q16, S1_Q16;
+
+ SKP_assert( win_type == 1 || win_type == 2 );
+
+ /* Length must be in a range from 16 to 120 and a multiple of 4 */
+ SKP_assert( length >= 16 && length <= 120 );
+ SKP_assert( ( length & 3 ) == 0 );
+
+ /* Frequency */
+ k = ( length >> 2 ) - 4;
+ SKP_assert( k >= 0 && k <= 26 );
+ f_Q16 = (SKP_int)freq_table_Q16[ k ];
+
+ /* Factor used for cosine approximation */
+ c_Q16 = SKP_SMULWB( f_Q16, -f_Q16 );
+ SKP_assert( c_Q16 >= -32768 );
+
+ /* initialize state */
+ if( win_type == 1 ) {
+ /* start from 0 */
+ S0_Q16 = 0;
+ /* approximation of sin(f) */
+ S1_Q16 = f_Q16 + SKP_RSHIFT( length, 3 );
+ } else {
+ /* start from 1 */
+ S0_Q16 = ( 1 << 16 );
+ /* approximation of cos(f) */
+ S1_Q16 = ( 1 << 16 ) + SKP_RSHIFT( c_Q16, 1 ) + SKP_RSHIFT( length, 4 );
+ }
+
+ /* Uses the recursive equation: sin(n*f) = 2 * cos(f) * sin((n-1)*f) - sin((n-2)*f) */
+ /* 4 samples at a time */
+ for( k = 0; k < length; k += 4 ) {
+ px_win[ k ] = (SKP_int16)SKP_SMULWB( SKP_RSHIFT( S0_Q16 + S1_Q16, 1 ), px[ k ] );
+ px_win[ k + 1 ] = (SKP_int16)SKP_SMULWB( S1_Q16, px[ k + 1] );
+ S0_Q16 = SKP_SMULWB( S1_Q16, c_Q16 ) + SKP_LSHIFT( S1_Q16, 1 ) - S0_Q16 + 1;
+ S0_Q16 = SKP_min( S0_Q16, ( 1 << 16 ) );
+
+ px_win[ k + 2 ] = (SKP_int16)SKP_SMULWB( SKP_RSHIFT( S0_Q16 + S1_Q16, 1 ), px[ k + 2] );
+ px_win[ k + 3 ] = (SKP_int16)SKP_SMULWB( S0_Q16, px[ k + 3 ] );
+ S1_Q16 = SKP_SMULWB( S0_Q16, c_Q16 ) + SKP_LSHIFT( S0_Q16, 1 ) - S1_Q16;
+ S1_Q16 = SKP_min( S1_Q16, ( 1 << 16 ) );
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_array_maxabs.c
@@ -1,0 +1,69 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_int16_array_maxabs.c *
+ * *
+ * Function that returns the maximum absolut value of *
+ * the input vector *
+ * *
+ * Copyright 2006 (c), Skype Limited *
+ * Date: 060221 *
+ * */
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* Function that returns the maximum absolut value of the input vector */
+SKP_int16 SKP_Silk_int16_array_maxabs( /* O Maximum absolute value, max: 2^15-1 */
+ const SKP_int16 *vec, /* I Input vector [len] */
+ const SKP_int32 len /* I Length of input vector */
+)
+{
+ SKP_int32 max = 0, i, lvl = 0, ind;
+ if( len == 0 ) return 0;
+
+ ind = len - 1;
+ max = SKP_SMULBB( vec[ ind ], vec[ ind ] );
+ for( i = len - 2; i >= 0; i-- ) {
+ lvl = SKP_SMULBB( vec[ i ], vec[ i ] );
+ if( lvl > max ) {
+ max = lvl;
+ ind = i;
+ }
+ }
+
+ /* Do not return 32768, as it will not fit in an int16 so may lead to problems later on */
+ if( max >= 1073676289 ) { // (2^15-1)^2 = 1073676289
+ return( SKP_int16_MAX );
+ } else {
+ if( vec[ ind ] < 0 ) {
+ return( -vec[ ind ] );
+ } else {
+ return( vec[ ind ] );
+ }
+ }
+}
+
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_autocorr.c
@@ -1,0 +1,72 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* Compute autocorrelation */
+void SKP_Silk_autocorr(
+ SKP_int32 *results, /* O Result (length correlationCount) */
+ SKP_int *scale, /* O Scaling of the correlation vector */
+ const SKP_int16 *inputData, /* I Input data to correlate */
+ const SKP_int inputDataSize, /* I Length of input */
+ const SKP_int correlationCount /* I Number of correlation taps to compute */
+)
+{
+ SKP_int i, lz, nRightShifts, corrCount;
+ SKP_int64 corr64;
+
+ corrCount = SKP_min_int( inputDataSize, correlationCount );
+
+ /* compute energy (zero-lag correlation) */
+ corr64 = SKP_Silk_inner_prod16_aligned_64( inputData, inputData, inputDataSize );
+
+ /* deal with all-zero input data */
+ corr64 += 1;
+
+ /* number of leading zeros */
+ lz = SKP_Silk_CLZ64( corr64 );
+
+ /* scaling: number of right shifts applied to correlations */
+ nRightShifts = 35 - lz;
+ *scale = nRightShifts;
+
+ if( nRightShifts <= 0 ) {
+ results[ 0 ] = SKP_LSHIFT( (SKP_int32)SKP_CHECK_FIT32( corr64 ), -nRightShifts );
+
+ /* compute remaining correlations based on int32 inner product */
+ for( i = 1; i < corrCount; i++ ) {
+ results[ i ] = SKP_LSHIFT( SKP_Silk_inner_prod_aligned( inputData, inputData + i, inputDataSize - i ), -nRightShifts );
+ }
+ } else {
+ results[ 0 ] = (SKP_int32)SKP_CHECK_FIT32( SKP_RSHIFT64( corr64, nRightShifts ) );
+
+ /* compute remaining correlations based on int64 inner product */
+ for( i = 1; i < corrCount; i++ ) {
+ results[ i ] = (SKP_int32)SKP_CHECK_FIT32( SKP_RSHIFT64( SKP_Silk_inner_prod16_aligned_64( inputData, inputData + i, inputDataSize - i ), nRightShifts ) );
+ }
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_biquad_alt.c
@@ -1,0 +1,73 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_biquad_alt.c *
+ * *
+ * Second order ARMA filter *
+ * Can handle slowly varying filter coefficients *
+ * */
+#include "SKP_Silk_SigProc_FIX.h"
+
+
+/* Second order ARMA filter, alternative implementation */
+void SKP_Silk_biquad_alt(
+ const SKP_int16 *in, /* I: Input signal */
+ const SKP_int32 *B_Q28, /* I: MA coefficients [3] */
+ const SKP_int32 *A_Q28, /* I: AR coefficients [2] */
+ SKP_int32 *S, /* I/O: State vector [2] */
+ SKP_int16 *out, /* O: Output signal */
+ const SKP_int32 len /* I: Signal length (must be even) */
+)
+{
+ /* DIRECT FORM II TRANSPOSED (uses 2 element state vector) */
+ SKP_int k;
+ SKP_int32 inval, A0_U_Q28, A0_L_Q28, A1_U_Q28, A1_L_Q28, out32_Q14;
+
+ /* Negate A_Q28 values and split in two parts */
+ A0_L_Q28 = ( -A_Q28[ 0 ] ) & 0x00003FFF; /* lower part */
+ A0_U_Q28 = SKP_RSHIFT( -A_Q28[ 0 ], 14 ); /* upper part */
+ A1_L_Q28 = ( -A_Q28[ 1 ] ) & 0x00003FFF; /* lower part */
+ A1_U_Q28 = SKP_RSHIFT( -A_Q28[ 1 ], 14 ); /* upper part */
+
+ for( k = 0; k < len; k++ ) {
+ /* S[ 0 ], S[ 1 ]: Q12 */
+ inval = in[ k ];
+ out32_Q14 = SKP_LSHIFT( SKP_SMLAWB( S[ 0 ], B_Q28[ 0 ], inval ), 2 );
+
+ S[ 0 ] = S[1] + SKP_RSHIFT_ROUND( SKP_SMULWB( out32_Q14, A0_L_Q28 ), 14 );
+ S[ 0 ] = SKP_SMLAWB( S[ 0 ], out32_Q14, A0_U_Q28 );
+ S[ 0 ] = SKP_SMLAWB( S[ 0 ], B_Q28[ 1 ], inval);
+
+ S[ 1 ] = SKP_RSHIFT_ROUND( SKP_SMULWB( out32_Q14, A1_L_Q28 ), 14 );
+ S[ 1 ] = SKP_SMLAWB( S[ 1 ], out32_Q14, A1_U_Q28 );
+ S[ 1 ] = SKP_SMLAWB( S[ 1 ], B_Q28[ 2 ], inval );
+
+ /* Scale back to Q0 and saturate */
+ out[ k ] = (SKP_int16)SKP_SAT16( SKP_RSHIFT( out32_Q14 + (1<<14) - 1, 14 ) );
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_burg_modified.c
@@ -1,0 +1,228 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_burg_modified.c *
+ * *
+ * Calculates the reflection coefficients from the input vector *
+ * Input vector contains nb_subfr sub vectors of length L_sub + D *
+ * *
+ * Copyright 2009 (c), Skype Limited *
+ * Date: 100105 *
+ */
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+#define MAX_FRAME_SIZE 384 // subfr_length * nb_subfr = ( 0.005 * 16000 + 16 ) * 4 = 384
+#define MAX_NB_SUBFR 4
+
+#define QA 25
+#define N_BITS_HEAD_ROOM 2
+#define MIN_RSHIFTS -16
+#define MAX_RSHIFTS (32 - QA)
+
+/* Compute reflection coefficients from input signal */
+void SKP_Silk_burg_modified(
+ SKP_int32 *res_nrg, /* O residual energy */
+ SKP_int *res_nrg_Q, /* O residual energy Q value */
+ SKP_int32 A_Q16[], /* O prediction coefficients (length order) */
+ const SKP_int16 x[], /* I input signal, length: nb_subfr * ( D + subfr_length ) */
+ const SKP_int subfr_length, /* I input signal subframe length (including D preceeding samples) */
+ const SKP_int nb_subfr, /* I number of subframes stacked in x */
+ const SKP_int32 WhiteNoiseFrac_Q32, /* I fraction added to zero-lag autocorrelation */
+ const SKP_int D /* I order */
+)
+{
+ SKP_int k, n, s, lz, rshifts, rshifts_extra;
+ SKP_int32 C0, num, nrg, rc_Q31, Atmp_QA, Atmp1, tmp1, tmp2, x1, x2;
+ const SKP_int16 *x_ptr;
+
+ SKP_int32 C_first_row[ SKP_Silk_MAX_ORDER_LPC ];
+ SKP_int32 C_last_row[ SKP_Silk_MAX_ORDER_LPC ];
+ SKP_int32 Af_QA[ SKP_Silk_MAX_ORDER_LPC ];
+
+ SKP_int32 CAf[ SKP_Silk_MAX_ORDER_LPC + 1 ];
+ SKP_int32 CAb[ SKP_Silk_MAX_ORDER_LPC + 1 ];
+
+ SKP_assert( subfr_length * nb_subfr <= MAX_FRAME_SIZE );
+ SKP_assert( nb_subfr <= MAX_NB_SUBFR );
+
+
+ /* Compute autocorrelations, added over subframes */
+ SKP_Silk_sum_sqr_shift( &C0, &rshifts, x, nb_subfr * subfr_length );
+ if( rshifts > MAX_RSHIFTS ) {
+ C0 = SKP_LSHIFT32( C0, rshifts - MAX_RSHIFTS );
+ SKP_assert( C0 > 0 );
+ rshifts = MAX_RSHIFTS;
+ } else {
+ lz = SKP_Silk_CLZ32( C0 ) - 1;
+ rshifts_extra = N_BITS_HEAD_ROOM - lz;
+ if( rshifts_extra > 0 ) {
+ rshifts_extra = SKP_min( rshifts_extra, MAX_RSHIFTS - rshifts );
+ C0 = SKP_RSHIFT32( C0, rshifts_extra );
+ } else {
+ rshifts_extra = SKP_max( rshifts_extra, MIN_RSHIFTS - rshifts );
+ C0 = SKP_LSHIFT32( C0, -rshifts_extra );
+ }
+ rshifts += rshifts_extra;
+ }
+ SKP_memset( C_first_row, 0, SKP_Silk_MAX_ORDER_LPC * sizeof( SKP_int32 ) );
+ if( rshifts > 0 ) {
+ for( s = 0; s < nb_subfr; s++ ) {
+ x_ptr = x + s * subfr_length;
+ for( n = 1; n < D + 1; n++ ) {
+ C_first_row[ n - 1 ] += (SKP_int32)SKP_RSHIFT64(
+ SKP_Silk_inner_prod16_aligned_64( x_ptr, x_ptr + n, subfr_length - n ), rshifts );
+ }
+ }
+ } else {
+ for( s = 0; s < nb_subfr; s++ ) {
+ x_ptr = x + s * subfr_length;
+ for( n = 1; n < D + 1; n++ ) {
+ C_first_row[ n - 1 ] += SKP_LSHIFT32(
+ SKP_Silk_inner_prod_aligned( x_ptr, x_ptr + n, subfr_length - n ), -rshifts );
+ }
+ }
+ }
+ SKP_memcpy( C_last_row, C_first_row, SKP_Silk_MAX_ORDER_LPC * sizeof( SKP_int32 ) );
+
+ /* Initialize */
+ CAb[ 0 ] = CAf[ 0 ] = C0 + SKP_SMMUL( WhiteNoiseFrac_Q32, C0 ) + 1; // Q(-rshifts)
+
+ for( n = 0; n < D; n++ ) {
+ /* Update first row of correlation matrix (without first element) */
+ /* Update last row of correlation matrix (without last element, stored in reversed order) */
+ /* Update C * Af */
+ /* Update C * flipud(Af) (stored in reversed order) */
+ if( rshifts > -2 ) {
+ for( s = 0; s < nb_subfr; s++ ) {
+ x_ptr = x + s * subfr_length;
+ x1 = -SKP_LSHIFT32( (SKP_int32)x_ptr[ n ], 16 - rshifts ); // Q(16-rshifts)
+ x2 = -SKP_LSHIFT32( (SKP_int32)x_ptr[ subfr_length - n - 1 ], 16 - rshifts ); // Q(16-rshifts)
+ tmp1 = SKP_LSHIFT32( (SKP_int32)x_ptr[ n ], QA - 16 ); // Q(QA-16)
+ tmp2 = SKP_LSHIFT32( (SKP_int32)x_ptr[ subfr_length - n - 1 ], QA - 16 ); // Q(QA-16)
+ for( k = 0; k < n; k++ ) {
+ C_first_row[ k ] = SKP_SMLAWB( C_first_row[ k ], x1, x_ptr[ n - k - 1 ] ); // Q( -rshifts )
+ C_last_row[ k ] = SKP_SMLAWB( C_last_row[ k ], x2, x_ptr[ subfr_length - n + k ] ); // Q( -rshifts )
+ Atmp_QA = Af_QA[ k ];
+ tmp1 = SKP_SMLAWB( tmp1, Atmp_QA, x_ptr[ n - k - 1 ] ); // Q(QA-16)
+ tmp2 = SKP_SMLAWB( tmp2, Atmp_QA, x_ptr[ subfr_length - n + k ] ); // Q(QA-16)
+ }
+ tmp1 = SKP_LSHIFT32( -tmp1, 32 - QA - rshifts ); // Q(16-rshifts)
+ tmp2 = SKP_LSHIFT32( -tmp2, 32 - QA - rshifts ); // Q(16-rshifts)
+ for( k = 0; k <= n; k++ ) {
+ CAf[ k ] = SKP_SMLAWB( CAf[ k ], tmp1, x_ptr[ n - k ] ); // Q( -rshift )
+ CAb[ k ] = SKP_SMLAWB( CAb[ k ], tmp2, x_ptr[ subfr_length - n + k - 1 ] ); // Q( -rshift )
+ }
+ }
+ } else {
+ for( s = 0; s < nb_subfr; s++ ) {
+ x_ptr = x + s * subfr_length;
+ x1 = -SKP_LSHIFT32( (SKP_int32)x_ptr[ n ], -rshifts ); // Q( -rshifts )
+ x2 = -SKP_LSHIFT32( (SKP_int32)x_ptr[ subfr_length - n - 1 ], -rshifts ); // Q( -rshifts )
+ tmp1 = SKP_LSHIFT32( (SKP_int32)x_ptr[ n ], 17 ); // Q17
+ tmp2 = SKP_LSHIFT32( (SKP_int32)x_ptr[ subfr_length - n - 1 ], 17 ); // Q17
+ for( k = 0; k < n; k++ ) {
+ C_first_row[ k ] = SKP_MLA( C_first_row[ k ], x1, x_ptr[ n - k - 1 ] ); // Q( -rshifts )
+ C_last_row[ k ] = SKP_MLA( C_last_row[ k ], x2, x_ptr[ subfr_length - n + k ] ); // Q( -rshifts )
+ Atmp1 = SKP_RSHIFT_ROUND( Af_QA[ k ], QA - 17 ); // Q17
+ tmp1 = SKP_MLA( tmp1, x_ptr[ n - k - 1 ], Atmp1 ); // Q17
+ tmp2 = SKP_MLA( tmp2, x_ptr[ subfr_length - n + k ], Atmp1 ); // Q17
+ }
+ tmp1 = -tmp1; // Q17
+ tmp2 = -tmp2; // Q17
+ for( k = 0; k <= n; k++ ) {
+ CAf[ k ] = SKP_SMLAWW( CAf[ k ], tmp1,
+ SKP_LSHIFT32( (SKP_int32)x_ptr[ n - k ], -rshifts - 1 ) ); // Q( -rshift )
+ CAb[ k ] = SKP_SMLAWW( CAb[ k ], tmp2,
+ SKP_LSHIFT32( (SKP_int32)x_ptr[ subfr_length - n + k - 1 ], -rshifts - 1 ) );// Q( -rshift )
+ }
+ }
+ }
+
+ /* Calculate nominator and denominator for the next order reflection (parcor) coefficient */
+ tmp1 = C_first_row[ n ]; // Q( -rshifts )
+ tmp2 = C_last_row[ n ]; // Q( -rshifts )
+ num = 0; // Q( -rshifts )
+ nrg = SKP_ADD32( CAb[ 0 ], CAf[ 0 ] ); // Q( 1-rshifts )
+ for( k = 0; k < n; k++ ) {
+ Atmp_QA = Af_QA[ k ];
+ lz = SKP_Silk_CLZ32( SKP_abs( Atmp_QA ) ) - 1;
+ lz = SKP_min( 32 - QA, lz );
+ Atmp1 = SKP_LSHIFT32( Atmp_QA, lz ); // Q( QA + lz )
+
+ tmp1 = SKP_ADD_LSHIFT32( tmp1, SKP_SMMUL( C_last_row[ n - k - 1 ], Atmp1 ), 32 - QA - lz ); // Q( -rshifts )
+ tmp2 = SKP_ADD_LSHIFT32( tmp2, SKP_SMMUL( C_first_row[ n - k - 1 ], Atmp1 ), 32 - QA - lz ); // Q( -rshifts )
+ num = SKP_ADD_LSHIFT32( num, SKP_SMMUL( CAb[ n - k ], Atmp1 ), 32 - QA - lz ); // Q( -rshifts )
+ nrg = SKP_ADD_LSHIFT32( nrg, SKP_SMMUL( SKP_ADD32( CAb[ k + 1 ], CAf[ k + 1 ] ),
+ Atmp1 ), 32 - QA - lz ); // Q( 1-rshifts )
+ }
+ CAf[ n + 1 ] = tmp1; // Q( -rshifts )
+ CAb[ n + 1 ] = tmp2; // Q( -rshifts )
+ num = SKP_ADD32( num, tmp2 ); // Q( -rshifts )
+ num = SKP_LSHIFT32( -num, 1 ); // Q( 1-rshifts )
+
+ /* Calculate the next order reflection (parcor) coefficient */
+ if( SKP_abs( num ) < nrg ) {
+ rc_Q31 = SKP_DIV32_varQ( num, nrg, 31 );
+ } else {
+ /* Negative energy or ratio too high; set remaining coefficients to zero and exit loop */
+ SKP_memset( &Af_QA[ n ], 0, ( D - n ) * sizeof( SKP_int32 ) );
+ SKP_assert( 0 );
+ break;
+ }
+
+ /* Update the AR coefficients */
+ for( k = 0; k < (n + 1) >> 1; k++ ) {
+ tmp1 = Af_QA[ k ]; // QA
+ tmp2 = Af_QA[ n - k - 1 ]; // QA
+ Af_QA[ k ] = SKP_ADD_LSHIFT32( tmp1, SKP_SMMUL( tmp2, rc_Q31 ), 1 ); // QA
+ Af_QA[ n - k - 1 ] = SKP_ADD_LSHIFT32( tmp2, SKP_SMMUL( tmp1, rc_Q31 ), 1 ); // QA
+ }
+ Af_QA[ n ] = SKP_RSHIFT32( rc_Q31, 31 - QA ); // QA
+
+ /* Update C * Af and C * Ab */
+ for( k = 0; k <= n + 1; k++ ) {
+ tmp1 = CAf[ k ]; // Q( -rshifts )
+ tmp2 = CAb[ n - k + 1 ]; // Q( -rshifts )
+ CAf[ k ] = SKP_ADD_LSHIFT32( tmp1, SKP_SMMUL( tmp2, rc_Q31 ), 1 ); // Q( -rshifts )
+ CAb[ n - k + 1 ] = SKP_ADD_LSHIFT32( tmp2, SKP_SMMUL( tmp1, rc_Q31 ), 1 ); // Q( -rshifts )
+ }
+ }
+
+ /* Return residual energy */
+ nrg = CAf[ 0 ]; // Q( -rshifts )
+ tmp1 = 1 << 16; // Q16
+ for( k = 0; k < D; k++ ) {
+ Atmp1 = SKP_RSHIFT_ROUND( Af_QA[ k ], QA - 16 ); // Q16
+ nrg = SKP_SMLAWW( nrg, CAf[ k + 1 ], Atmp1 ); // Q( -rshifts )
+ tmp1 = SKP_SMLAWW( tmp1, Atmp1, Atmp1 ); // Q16
+ A_Q16[ k ] = -Atmp1;
+ }
+ *res_nrg = SKP_SMLAWW( nrg, SKP_SMMUL( WhiteNoiseFrac_Q32, C0 ), -tmp1 ); // Q( -rshifts )
+ *res_nrg_Q = -rshifts;
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_bwexpander.c
@@ -1,0 +1,49 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* Chirp (bandwidth expand) LP AR filter */
+void SKP_Silk_bwexpander(
+ SKP_int16 *ar, /* I/O AR filter to be expanded (without leading 1) */
+ const SKP_int d, /* I Length of ar */
+ SKP_int32 chirp_Q16 /* I Chirp factor (typically in the range 0 to 1) */
+)
+{
+ SKP_int i;
+ SKP_int32 chirp_minus_one_Q16;
+
+ chirp_minus_one_Q16 = chirp_Q16 - 65536;
+
+ /* NB: Dont use SKP_SMULWB, instead of SKP_RSHIFT_ROUND( SKP_MUL() , 16 ), below. */
+ /* Bias in SKP_SMULWB can lead to unstable filters */
+ for( i = 0; i < d - 1; i++ ) {
+ ar[ i ] = (SKP_int16)SKP_RSHIFT_ROUND( SKP_MUL( chirp_Q16, ar[ i ] ), 16 );
+ chirp_Q16 += SKP_RSHIFT_ROUND( SKP_MUL( chirp_Q16, chirp_minus_one_Q16 ), 16 );
+ }
+ ar[ d - 1 ] = (SKP_int16)SKP_RSHIFT_ROUND( SKP_MUL( chirp_Q16, ar[ d - 1 ] ), 16 );
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_bwexpander_32.c
@@ -1,0 +1,46 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* Chirp (bandwidth expand) LP AR filter */
+void SKP_Silk_bwexpander_32(
+ SKP_int32 *ar, /* I/O AR filter to be expanded (without leading 1) */
+ const SKP_int d, /* I Length of ar */
+ SKP_int32 chirp_Q16 /* I Chirp factor in Q16 */
+)
+{
+ SKP_int i;
+ SKP_int32 tmp_chirp_Q16;
+
+ tmp_chirp_Q16 = chirp_Q16;
+ for( i = 0; i < d - 1; i++ ) {
+ ar[ i ] = SKP_SMULWW( ar[ i ], tmp_chirp_Q16 );
+ tmp_chirp_Q16 = SKP_SMULWW( chirp_Q16, tmp_chirp_Q16 );
+ }
+ ar[ d - 1 ] = SKP_SMULWW( ar[ d - 1 ], tmp_chirp_Q16 );
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_debug.c
@@ -1,0 +1,175 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_debug.c *
+ * *
+ * This contains code to help debugging *
+ * *
+ * Copyright 2009 (c), Skype Limited *
+ * Date: 090629 *
+ * */
+
+#include "SKP_debug.h"
+#include "../src_SigProc_FIX/SKP_Silk_SigProc_FIX.h"
+
+#if SKP_TIC_TOC
+
+#ifdef _WIN32
+
+#if (defined(_WIN32) || defined(_WINCE))
+#include <windows.h> /* timer */
+#else // Linux or Mac
+#include <sys/time.h>
+#endif
+
+unsigned long GetHighResolutionTime(void) /* O: time in usec*/
+{
+ /* Returns a time counter in microsec */
+ /* the resolution is platform dependent */
+ /* but is typically 1.62 us resolution */
+ LARGE_INTEGER lpPerformanceCount;
+ LARGE_INTEGER lpFrequency;
+ QueryPerformanceCounter(&lpPerformanceCount);
+ QueryPerformanceFrequency(&lpFrequency);
+ return (unsigned long)((1000000*(lpPerformanceCount.QuadPart)) / lpFrequency.QuadPart);
+}
+#else // Linux or Mac
+unsigned long GetHighResolutionTime(void) /* O: time in usec*/
+{
+ struct timeval tv;
+ gettimeofday(&tv, 0);
+ return((tv.tv_sec*1000000)+(tv.tv_usec));
+}
+#endif
+
+int SKP_Timer_nTimers = 0;
+int SKP_Timer_depth_ctr = 0;
+char SKP_Timer_tags[SKP_NUM_TIMERS_MAX][SKP_NUM_TIMERS_MAX_TAG_LEN];
+#ifdef WIN32
+LARGE_INTEGER SKP_Timer_start[SKP_NUM_TIMERS_MAX];
+#else
+unsigned long SKP_Timer_start[SKP_NUM_TIMERS_MAX];
+#endif
+unsigned int SKP_Timer_cnt[SKP_NUM_TIMERS_MAX];
+SKP_int64 SKP_Timer_min[SKP_NUM_TIMERS_MAX];
+SKP_int64 SKP_Timer_sum[SKP_NUM_TIMERS_MAX];
+SKP_int64 SKP_Timer_max[SKP_NUM_TIMERS_MAX];
+SKP_int64 SKP_Timer_depth[SKP_NUM_TIMERS_MAX];
+
+#ifdef WIN32
+void SKP_TimerSave(char *file_name)
+{
+ if( SKP_Timer_nTimers > 0 )
+ {
+ int k;
+ FILE *fp;
+ LARGE_INTEGER lpFrequency;
+ LARGE_INTEGER lpPerformanceCount1, lpPerformanceCount2;
+ int del = 0x7FFFFFFF;
+ double avg, sum_avg;
+ /* estimate overhead of calling performance counters */
+ for( k = 0; k < 1000; k++ ) {
+ QueryPerformanceCounter(&lpPerformanceCount1);
+ QueryPerformanceCounter(&lpPerformanceCount2);
+ lpPerformanceCount2.QuadPart -= lpPerformanceCount1.QuadPart;
+ if( (int)lpPerformanceCount2.LowPart < del )
+ del = lpPerformanceCount2.LowPart;
+ }
+ QueryPerformanceFrequency(&lpFrequency);
+ /* print results to file */
+ sum_avg = 0.0f;
+ for( k = 0; k < SKP_Timer_nTimers; k++ ) {
+ if (SKP_Timer_depth[k] == 0) {
+ sum_avg += (1e6 * SKP_Timer_sum[k] / SKP_Timer_cnt[k] - del) / lpFrequency.QuadPart * SKP_Timer_cnt[k];
+ }
+ }
+ fp = fopen(file_name, "w");
+ fprintf(fp, " min avg %% max count\n");
+ for( k = 0; k < SKP_Timer_nTimers; k++ ) {
+ if (SKP_Timer_depth[k] == 0) {
+ fprintf(fp, "%-28s", SKP_Timer_tags[k]);
+ } else if (SKP_Timer_depth[k] == 1) {
+ fprintf(fp, " %-27s", SKP_Timer_tags[k]);
+ } else if (SKP_Timer_depth[k] == 2) {
+ fprintf(fp, " %-26s", SKP_Timer_tags[k]);
+ } else if (SKP_Timer_depth[k] == 3) {
+ fprintf(fp, " %-25s", SKP_Timer_tags[k]);
+ } else {
+ fprintf(fp, " %-24s", SKP_Timer_tags[k]);
+ }
+ avg = (1e6 * SKP_Timer_sum[k] / SKP_Timer_cnt[k] - del) / lpFrequency.QuadPart;
+ fprintf(fp, "%8.2f", (1e6 * (SKP_max_64(SKP_Timer_min[k] - del, 0))) / lpFrequency.QuadPart);
+ fprintf(fp, "%12.2f %6.2f", avg, 100.0 * avg / sum_avg * SKP_Timer_cnt[k]);
+ fprintf(fp, "%12.2f", (1e6 * (SKP_max_64(SKP_Timer_max[k] - del, 0))) / lpFrequency.QuadPart);
+ fprintf(fp, "%10d\n", SKP_Timer_cnt[k]);
+ }
+ fprintf(fp, " microseconds\n");
+ fclose(fp);
+ }
+}
+#else
+void SKP_TimerSave(char *file_name)
+{
+ if( SKP_Timer_nTimers > 0 )
+ {
+ int k;
+ FILE *fp;
+ /* print results to file */
+ fp = fopen(file_name, "w");
+ fprintf(fp, " min avg max count\n");
+ for( k = 0; k < SKP_Timer_nTimers; k++ )
+ {
+ if (SKP_Timer_depth[k] == 0) {
+ fprintf(fp, "%-28s", SKP_Timer_tags[k]);
+ } else if (SKP_Timer_depth[k] == 1) {
+ fprintf(fp, " %-27s", SKP_Timer_tags[k]);
+ } else if (SKP_Timer_depth[k] == 2) {
+ fprintf(fp, " %-26s", SKP_Timer_tags[k]);
+ } else if (SKP_Timer_depth[k] == 3) {
+ fprintf(fp, " %-25s", SKP_Timer_tags[k]);
+ } else {
+ fprintf(fp, " %-24s", SKP_Timer_tags[k]);
+ }
+ fprintf(fp, "%d ", SKP_Timer_min[k]);
+ fprintf(fp, "%f ", (double)SKP_Timer_sum[k] / (double)SKP_Timer_cnt[k]);
+ fprintf(fp, "%d ", SKP_Timer_max[k]);
+ fprintf(fp, "%10d\n", SKP_Timer_cnt[k]);
+ }
+ fprintf(fp, " microseconds\n");
+ fclose(fp);
+ }
+}
+#endif
+
+#endif /* SKP_TIC_TOC */
+
+#if SKP_DEBUG
+FILE *SKP_debug_store_fp[ SKP_NUM_STORES_MAX ];
+int SKP_debug_store_count = 0;
+#endif /* SKP_DEBUG */
+
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_decode_pitch.c
@@ -1,0 +1,71 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/***********************************************************
+* Pitch analyser function
+********************************************************** */
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_pitch_est_defines.h"
+
+void SKP_Silk_decode_pitch(
+ SKP_int16 lagIndex, /* I */
+ SKP_int8 contourIndex, /* O */
+ SKP_int pitch_lags[], /* O pitch values */
+ const SKP_int Fs_kHz, /* I sampling frequency (kHz) */
+ const SKP_int nb_subfr /* I number of sub frames */
+)
+{
+ SKP_int lag, k, min_lag, cbk_size;
+ const SKP_int8 *Lag_CB_ptr;
+
+ if( Fs_kHz == 8 ) {
+ if( nb_subfr == PE_MAX_NB_SUBFR ) {
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage2[ 0 ][ 0 ];
+ cbk_size = PE_NB_CBKS_STAGE2_EXT;
+ } else {
+ SKP_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage2_10_ms[ 0 ][ 0 ];
+ cbk_size = PE_NB_CBKS_STAGE2_10MS;
+ }
+ } else {
+ if( nb_subfr == PE_MAX_NB_SUBFR ) {
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage3[ 0 ][ 0 ];
+ cbk_size = PE_NB_CBKS_STAGE3_MAX;
+ } else {
+ SKP_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 );
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage3_10_ms[ 0 ][ 0 ];
+ cbk_size = PE_NB_CBKS_STAGE3_10MS;
+ }
+ }
+
+ min_lag = SKP_SMULBB( PE_MIN_LAG_MS, Fs_kHz );
+ lag = min_lag + lagIndex;
+
+ for( k = 0; k < nb_subfr; k++ ) {
+ pitch_lags[ k ] = lag + matrix_ptr( Lag_CB_ptr, k, contourIndex, cbk_size );
+ }
+}
\ No newline at end of file
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_inner_prod_aligned.c
@@ -1,0 +1,77 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* sum= for(i=0;i<len;i++)inVec1[i]*inVec2[i]; --- inner product */
+/* Note for ARM asm: */
+/* * inVec1 and inVec2 should be at least 2 byte aligned. (Or defined as short/int16) */
+/* * len should be positive 16bit integer. */
+/* * only when len>6, memory access can be reduced by half. */
+
+SKP_int32 SKP_Silk_inner_prod_aligned(
+ const SKP_int16 *const inVec1, /* I input vector 1 */
+ const SKP_int16 *const inVec2, /* I input vector 2 */
+ const SKP_int len /* I vector lengths */
+)
+{
+ SKP_int i;
+ SKP_int32 sum = 0;
+ for( i = 0; i < len; i++ ) {
+ sum = SKP_SMLABB( sum, inVec1[ i ], inVec2[ i ] );
+ }
+ return sum;
+}
+
+SKP_int32 SKP_Silk_inner_prod_aligned_scale(
+ const SKP_int16 *const inVec1, /* I input vector 1 */
+ const SKP_int16 *const inVec2, /* I input vector 2 */
+ const SKP_int scale, /* I number of bits to shift */
+ const SKP_int len /* I vector lengths */
+)
+{
+ SKP_int i;
+ SKP_int32 sum = 0;
+ for( i = 0; i < len; i++ ) {
+ sum = SKP_ADD_RSHIFT32( sum, SKP_SMULBB( inVec1[ i ], inVec2[ i ] ), scale );
+ }
+ return sum;
+}
+
+SKP_int64 SKP_Silk_inner_prod16_aligned_64(
+ const SKP_int16 *inVec1, /* I input vector 1 */
+ const SKP_int16 *inVec2, /* I input vector 2 */
+ const SKP_int len /* I vector lengths */
+)
+{
+ SKP_int i;
+ SKP_int64 sum = 0;
+ for( i = 0; i < len; i++ ) {
+ sum = SKP_SMLALBB( sum, inVec1[ i ], inVec2[ i ] );
+ }
+ return sum;
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_k2a.c
@@ -1,0 +1,49 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* Step up function, converts reflection coefficients to prediction coefficients */
+void SKP_Silk_k2a(
+ SKP_int32 *A_Q24, /* O: Prediction coefficients [order] Q24 */
+ const SKP_int16 *rc_Q15, /* I: Reflection coefficients [order] Q15 */
+ const SKP_int32 order /* I: Prediction order */
+)
+{
+ SKP_int k, n;
+ SKP_int32 Atmp[ SKP_Silk_MAX_ORDER_LPC ];
+
+ for( k = 0; k < order; k++ ) {
+ for( n = 0; n < k; n++ ) {
+ Atmp[ n ] = A_Q24[ n ];
+ }
+ for( n = 0; n < k; n++ ) {
+ A_Q24[ n ] = SKP_SMLAWB( A_Q24[ n ], SKP_LSHIFT( Atmp[ k - n - 1 ], 1 ), rc_Q15[ k ] );
+ }
+ A_Q24[ k ] = -SKP_LSHIFT( (SKP_int32)rc_Q15[ k ], 9 );
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_k2a_Q16.c
@@ -1,0 +1,49 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* Step up function, converts reflection coefficients to prediction coefficients */
+void SKP_Silk_k2a_Q16(
+ SKP_int32 *A_Q24, /* O: Prediction coefficients [order] Q24 */
+ const SKP_int32 *rc_Q16, /* I: Reflection coefficients [order] Q16 */
+ const SKP_int32 order /* I: Prediction order */
+)
+{
+ SKP_int k, n;
+ SKP_int32 Atmp[ SKP_Silk_MAX_ORDER_LPC ];
+
+ for( k = 0; k < order; k++ ) {
+ for( n = 0; n < k; n++ ) {
+ Atmp[ n ] = A_Q24[ n ];
+ }
+ for( n = 0; n < k; n++ ) {
+ A_Q24[ n ] = SKP_SMLAWW( A_Q24[ n ], Atmp[ k - n - 1 ], rc_Q16[ k ] );
+ }
+ A_Q24[ k ] = -SKP_LSHIFT( rc_Q16[ k ], 8 );
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_lin2log.c
@@ -1,0 +1,40 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+/* Approximation of 128 * log2() (very close inverse of approx 2^() below) */
+/* Convert input to a log scale */
+SKP_int32 SKP_Silk_lin2log( const SKP_int32 inLin ) /* I: Input in linear scale */
+{
+ SKP_int32 lz, frac_Q7;
+
+ SKP_Silk_CLZ_FRAC( inLin, &lz, &frac_Q7 );
+
+ /* Piece-wise parabolic approximation */
+ return( SKP_LSHIFT( 31 - lz, 7 ) + SKP_SMLAWB( frac_Q7, SKP_MUL( frac_Q7, 128 - frac_Q7 ), 179 ) );
+}
+
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_log2lin.c
@@ -1,0 +1,50 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* Approximation of 2^() (very close inverse of SKP_Silk_lin2log()) */
+/* Convert input to a linear scale */
+SKP_int32 SKP_Silk_log2lin( const SKP_int32 inLog_Q7 ) /* I: Input on log scale */
+{
+ SKP_int32 out, frac_Q7;
+
+ if( inLog_Q7 < 0 ) {
+ return 0;
+ }
+
+ out = SKP_LSHIFT( 1, SKP_RSHIFT( inLog_Q7, 7 ) );
+ frac_Q7 = inLog_Q7 & 0x7F;
+ if( inLog_Q7 < 2048 ) {
+ /* Piece-wise parabolic approximation */
+ out = SKP_ADD_RSHIFT( out, SKP_MUL( out, SKP_SMLAWB( frac_Q7, SKP_MUL( frac_Q7, 128 - frac_Q7 ), -174 ) ), 7 );
+ } else {
+ /* Piece-wise parabolic approximation */
+ out = SKP_MLA( out, SKP_RSHIFT( out, 7 ), SKP_SMLAWB( frac_Q7, SKP_MUL( frac_Q7, 128 - frac_Q7 ), -174 ) );
+ }
+ return out;
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_macros.h
@@ -1,0 +1,132 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef _SKP_SILK_API_C_H_
+#define _SKP_SILK_API_C_H_
+
+// This is an inline header file for general platform.
+
+// (a32 * (SKP_int32)((SKP_int16)(b32))) >> 16 output have to be 32bit int
+#define SKP_SMULWB(a32, b32) ((((a32) >> 16) * (SKP_int32)((SKP_int16)(b32))) + ((((a32) & 0x0000FFFF) * (SKP_int32)((SKP_int16)(b32))) >> 16))
+
+// a32 + (b32 * (SKP_int32)((SKP_int16)(c32))) >> 16 output have to be 32bit int
+#define SKP_SMLAWB(a32, b32, c32) ((a32) + ((((b32) >> 16) * (SKP_int32)((SKP_int16)(c32))) + ((((b32) & 0x0000FFFF) * (SKP_int32)((SKP_int16)(c32))) >> 16)))
+
+// (a32 * (b32 >> 16)) >> 16
+#define SKP_SMULWT(a32, b32) (((a32) >> 16) * ((b32) >> 16) + ((((a32) & 0x0000FFFF) * ((b32) >> 16)) >> 16))
+
+// a32 + (b32 * (c32 >> 16)) >> 16
+#define SKP_SMLAWT(a32, b32, c32) ((a32) + (((b32) >> 16) * ((c32) >> 16)) + ((((b32) & 0x0000FFFF) * ((c32) >> 16)) >> 16))
+
+// (SKP_int32)((SKP_int16)(a3))) * (SKP_int32)((SKP_int16)(b32)) output have to be 32bit int
+#define SKP_SMULBB(a32, b32) ((SKP_int32)((SKP_int16)(a32)) * (SKP_int32)((SKP_int16)(b32)))
+
+// a32 + (SKP_int32)((SKP_int16)(b32)) * (SKP_int32)((SKP_int16)(c32)) output have to be 32bit int
+#define SKP_SMLABB(a32, b32, c32) ((a32) + ((SKP_int32)((SKP_int16)(b32))) * (SKP_int32)((SKP_int16)(c32)))
+
+// (SKP_int32)((SKP_int16)(a32)) * (b32 >> 16)
+#define SKP_SMULBT(a32, b32) ((SKP_int32)((SKP_int16)(a32)) * ((b32) >> 16))
+
+// a32 + (SKP_int32)((SKP_int16)(b32)) * (c32 >> 16)
+#define SKP_SMLABT(a32, b32, c32) ((a32) + ((SKP_int32)((SKP_int16)(b32))) * ((c32) >> 16))
+
+// a64 + (b32 * c32)
+#define SKP_SMLAL(a64, b32, c32) (SKP_ADD64((a64), ((SKP_int64)(b32) * (SKP_int64)(c32))))
+
+// (a32 * b32) >> 16
+#define SKP_SMULWW(a32, b32) SKP_MLA(SKP_SMULWB((a32), (b32)), (a32), SKP_RSHIFT_ROUND((b32), 16))
+
+// a32 + ((b32 * c32) >> 16)
+#define SKP_SMLAWW(a32, b32, c32) SKP_MLA(SKP_SMLAWB((a32), (b32), (c32)), (b32), SKP_RSHIFT_ROUND((c32), 16))
+
+/* add/subtract with output saturated */
+#define SKP_ADD_SAT32(a, b) ((((a) + (b)) & 0x80000000) == 0 ? \
+ ((((a) & (b)) & 0x80000000) != 0 ? SKP_int32_MIN : (a)+(b)) : \
+ ((((a) | (b)) & 0x80000000) == 0 ? SKP_int32_MAX : (a)+(b)) )
+
+#define SKP_SUB_SAT32(a, b) ((((a)-(b)) & 0x80000000) == 0 ? \
+ (( (a) & ((b)^0x80000000) & 0x80000000) ? SKP_int32_MIN : (a)-(b)) : \
+ ((((a)^0x80000000) & (b) & 0x80000000) ? SKP_int32_MAX : (a)-(b)) )
+
+SKP_INLINE SKP_int32 SKP_Silk_CLZ16(SKP_int16 in16)
+{
+ SKP_int32 out32 = 0;
+ if( in16 == 0 ) {
+ return 16;
+ }
+ /* test nibbles */
+ if( in16 & 0xFF00 ) {
+ if( in16 & 0xF000 ) {
+ in16 >>= 12;
+ } else {
+ out32 += 4;
+ in16 >>= 8;
+ }
+ } else {
+ if( in16 & 0xFFF0 ) {
+ out32 += 8;
+ in16 >>= 4;
+ } else {
+ out32 += 12;
+ }
+ }
+ /* test bits and return */
+ if( in16 & 0xC ) {
+ if( in16 & 0x8 )
+ return out32 + 0;
+ else
+ return out32 + 1;
+ } else {
+ if( in16 & 0xE )
+ return out32 + 2;
+ else
+ return out32 + 3;
+ }
+}
+
+SKP_INLINE SKP_int32 SKP_Silk_CLZ32(SKP_int32 in32)
+{
+ /* test highest 16 bits and convert to SKP_int16 */
+ if( in32 & 0xFFFF0000 ) {
+ return SKP_Silk_CLZ16((SKP_int16)(in32 >> 16));
+ } else {
+ return SKP_Silk_CLZ16((SKP_int16)in32) + 16;
+ }
+}
+
+/* Row based */
+#define matrix_ptr(Matrix_base_adr, row, column, N) *(Matrix_base_adr + ((row)*(N)+(column)))
+#define matrix_adr(Matrix_base_adr, row, column, N) (Matrix_base_adr + ((row)*(N)+(column)))
+
+/* Column based */
+#ifndef matrix_c_ptr
+# define matrix_c_ptr(Matrix_base_adr, row, column, M) *(Matrix_base_adr + ((row)+(M)*(column)))
+#endif
+#define matrix_c_adr(Matrix_base_adr, row, column, M) (Matrix_base_adr + ((row)+(M)*(column)))
+
+#endif //_SKP_SILK_API_C_H_
+
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_pitch_analysis_core.c
@@ -1,0 +1,744 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/***********************************************************
+* Pitch analyser function
+********************************************************** */
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_pitch_est_defines.h"
+#include "SKP_debug.h"
+
+#define SCRATCH_SIZE 22
+
+/************************************************************/
+/* Internally used functions */
+/************************************************************/
+void SKP_FIX_P_Ana_calc_corr_st3(
+ SKP_int32 cross_corr_st3[ PE_MAX_NB_SUBFR ][ PE_NB_CBKS_STAGE3_MAX ][ PE_NB_STAGE3_LAGS ],/* (O) 3 DIM correlation array */
+ const SKP_int16 signal[], /* I vector to correlate */
+ SKP_int start_lag, /* I lag offset to search around */
+ SKP_int sf_length, /* I length of a 5 ms subframe */
+ SKP_int nb_subfr, /* I number of subframes */
+ SKP_int complexity /* I Complexity setting */
+);
+
+void SKP_FIX_P_Ana_calc_energy_st3(
+ SKP_int32 energies_st3[ PE_MAX_NB_SUBFR ][ PE_NB_CBKS_STAGE3_MAX ][ PE_NB_STAGE3_LAGS ],/* (O) 3 DIM energy array */
+ const SKP_int16 signal[], /* I vector to calc energy in */
+ SKP_int start_lag, /* I lag offset to search around */
+ SKP_int sf_length, /* I length of one 5 ms subframe */
+ SKP_int nb_subfr, /* I number of subframes */
+ SKP_int complexity /* I Complexity setting */
+);
+
+SKP_int32 SKP_FIX_P_Ana_find_scaling(
+ const SKP_int16 *signal,
+ const SKP_int signal_length,
+ const SKP_int sum_sqr_len
+);
+
+/*************************************************************/
+/* FIXED POINT CORE PITCH ANALYSIS FUNCTION */
+/*************************************************************/
+SKP_int SKP_Silk_pitch_analysis_core( /* O Voicing estimate: 0 voiced, 1 unvoiced */
+ const SKP_int16 *signal, /* I Signal of length PE_FRAME_LENGTH_MS*Fs_kHz */
+ SKP_int *pitch_out, /* O 4 pitch lag values */
+ SKP_int16 *lagIndex, /* O Lag Index */
+ SKP_int8 *contourIndex, /* O Pitch contour Index */
+ SKP_int *LTPCorr_Q15, /* I/O Normalized correlation; input: value from previous frame */
+ SKP_int prevLag, /* I Last lag of previous frame; set to zero is unvoiced */
+ const SKP_int32 search_thres1_Q16, /* I First stage threshold for lag candidates 0 - 1 */
+ const SKP_int search_thres2_Q15, /* I Final threshold for lag candidates 0 - 1 */
+ const SKP_int Fs_kHz, /* I Sample frequency (kHz) */
+ const SKP_int complexity, /* I Complexity setting, 0-2, where 2 is highest */
+ const SKP_int nb_subfr /* I number of 5 ms subframes */
+)
+{
+ SKP_int16 signal_8kHz[ PE_MAX_FRAME_LENGTH_ST_2 ];
+ SKP_int16 signal_4kHz[ PE_MAX_FRAME_LENGTH_ST_1 ];
+ SKP_int32 filt_state[ 6 ];
+ SKP_int32 scratch_mem[ 3 * PE_MAX_FRAME_LENGTH ];
+ SKP_int16 *input_signal_ptr;
+ SKP_int i, k, d, j;
+ SKP_int16 C[ PE_MAX_NB_SUBFR ][ ( PE_MAX_LAG >> 1 ) + 5 ];
+ const SKP_int16 *target_ptr, *basis_ptr;
+ SKP_int32 cross_corr, normalizer, energy, shift, energy_basis, energy_target;
+ SKP_int d_srch[ PE_D_SRCH_LENGTH ], Cmax, length_d_srch, length_d_comp;
+ SKP_int16 d_comp[ ( PE_MAX_LAG >> 1 ) + 5 ];
+ SKP_int32 sum, threshold, temp32, lag_counter;
+ SKP_int CBimax, CBimax_new, CBimax_old, lag, start_lag, end_lag, lag_new;
+ SKP_int32 CC[ PE_NB_CBKS_STAGE2_EXT ], CCmax, CCmax_b, CCmax_new_b, CCmax_new;
+ SKP_int32 energies_st3[ PE_MAX_NB_SUBFR ][ PE_NB_CBKS_STAGE3_MAX ][ PE_NB_STAGE3_LAGS ];
+ SKP_int32 crosscorr_st3[ PE_MAX_NB_SUBFR ][ PE_NB_CBKS_STAGE3_MAX ][ PE_NB_STAGE3_LAGS ];
+ SKP_int frame_length, frame_length_8kHz, frame_length_4kHz, max_sum_sq_length;
+ SKP_int sf_length, sf_length_8kHz, sf_length_4kHz;
+ SKP_int min_lag, min_lag_8kHz, min_lag_4kHz;
+ SKP_int max_lag, max_lag_8kHz, max_lag_4kHz;
+ SKP_int32 contour_bias_Q20, diff, lz, lshift;
+ SKP_int nb_cbk_search, cbk_size;
+ SKP_int32 delta_lag_log2_sqr_Q7, lag_log2_Q7, prevLag_log2_Q7, prev_lag_bias_Q15, corr_thres_Q15;
+ const SKP_int8 *Lag_CB_ptr;
+ /* Check for valid sampling frequency */
+ SKP_assert( Fs_kHz == 8 || Fs_kHz == 12 || Fs_kHz == 16 );
+
+ /* Check for valid complexity setting */
+ SKP_assert( complexity >= SKP_Silk_PE_MIN_COMPLEX );
+ SKP_assert( complexity <= SKP_Silk_PE_MAX_COMPLEX );
+
+ SKP_assert( search_thres1_Q16 >= 0 && search_thres1_Q16 <= (1<<16) );
+ SKP_assert( search_thres2_Q15 >= 0 && search_thres2_Q15 <= (1<<15) );
+
+ /* Setup frame lengths max / min lag for the sampling frequency */
+ frame_length = ( PE_LTP_MEM_LENGTH_MS + nb_subfr * PE_SUBFR_LENGTH_MS ) * Fs_kHz;
+ frame_length_4kHz = ( PE_LTP_MEM_LENGTH_MS + nb_subfr * PE_SUBFR_LENGTH_MS ) * 4;
+ frame_length_8kHz = ( PE_LTP_MEM_LENGTH_MS + nb_subfr * PE_SUBFR_LENGTH_MS ) * 8;
+ sf_length = PE_SUBFR_LENGTH_MS * Fs_kHz;
+ sf_length_4kHz = PE_SUBFR_LENGTH_MS * 4;
+ sf_length_8kHz = PE_SUBFR_LENGTH_MS * 8;
+ min_lag = PE_MIN_LAG_MS * Fs_kHz;
+ min_lag_4kHz = PE_MIN_LAG_MS * 4;
+ min_lag_8kHz = PE_MIN_LAG_MS * 8;
+ max_lag = PE_MAX_LAG_MS * Fs_kHz - 1;
+ max_lag_4kHz = PE_MAX_LAG_MS * 4;
+ max_lag_8kHz = PE_MAX_LAG_MS * 8 - 1;
+
+ SKP_memset( C, 0, sizeof( SKP_int16 ) * nb_subfr * ( ( PE_MAX_LAG >> 1 ) + 5) );
+
+ /* Resample from input sampled at Fs_kHz to 8 kHz */
+ if( Fs_kHz == 16 ) {
+ SKP_memset( filt_state, 0, 2 * sizeof( SKP_int32 ) );
+ SKP_Silk_resampler_down2( filt_state, signal_8kHz, signal, frame_length );
+ } else if ( Fs_kHz == 12 ) {
+ SKP_memset( filt_state, 0, 6 * sizeof( SKP_int32 ) );
+ SKP_Silk_resampler_down2_3( filt_state, signal_8kHz, signal, frame_length );
+ } else {
+ SKP_assert( Fs_kHz == 8 );
+ SKP_memcpy( signal_8kHz, signal, frame_length_8kHz * sizeof(SKP_int16) );
+ }
+
+ /* Decimate again to 4 kHz */
+ SKP_memset( filt_state, 0, 2 * sizeof( SKP_int32 ) );/* Set state to zero */
+ SKP_Silk_resampler_down2( filt_state, signal_4kHz, signal_8kHz, frame_length_8kHz );
+
+ /* Low-pass filter */
+ for( i = frame_length_4kHz - 1; i > 0; i-- ) {
+ signal_4kHz[ i ] = SKP_ADD_SAT16( signal_4kHz[ i ], signal_4kHz[ i - 1 ] );
+ }
+
+ /*******************************************************************************
+ ** Scale 4 kHz signal down to prevent correlations measures from overflowing
+ ** find scaling as max scaling for each 8kHz(?) subframe
+ *******************************************************************************/
+
+ /* Inner product is calculated with different lengths, so scale for the worst case */
+ max_sum_sq_length = SKP_max_32( sf_length_8kHz, SKP_LSHIFT( sf_length_4kHz, 2 ) );
+ shift = SKP_FIX_P_Ana_find_scaling( signal_4kHz, frame_length_4kHz, max_sum_sq_length );
+ if( shift > 0 ) {
+ for( i = 0; i < frame_length_4kHz; i++ ) {
+ signal_4kHz[ i ] = SKP_RSHIFT( signal_4kHz[ i ], shift );
+ }
+ }
+
+ /******************************************************************************
+ * FIRST STAGE, operating in 4 khz
+ ******************************************************************************/
+ target_ptr = &signal_4kHz[ SKP_LSHIFT( sf_length_4kHz, 2 ) ];
+ for( k = 0; k < nb_subfr >> 1; k++ ) {
+ /* Check that we are within range of the array */
+ SKP_assert( target_ptr >= signal_4kHz );
+ SKP_assert( target_ptr + sf_length_8kHz <= signal_4kHz + frame_length_4kHz );
+
+ basis_ptr = target_ptr - min_lag_4kHz;
+
+ /* Check that we are within range of the array */
+ SKP_assert( basis_ptr >= signal_4kHz );
+ SKP_assert( basis_ptr + sf_length_8kHz <= signal_4kHz + frame_length_4kHz );
+
+ normalizer = 0;
+ cross_corr = 0;
+ /* Calculate first vector products before loop */
+ cross_corr = SKP_Silk_inner_prod_aligned( target_ptr, basis_ptr, sf_length_8kHz );
+ normalizer = SKP_Silk_inner_prod_aligned( basis_ptr, basis_ptr, sf_length_8kHz );
+ normalizer = SKP_ADD_SAT32( normalizer, SKP_SMULBB( sf_length_8kHz, 4000 ) );
+
+ temp32 = SKP_DIV32( cross_corr, SKP_Silk_SQRT_APPROX( normalizer ) + 1 );
+ C[ k ][ min_lag_4kHz ] = (SKP_int16)SKP_SAT16( temp32 ); /* Q0 */
+
+ /* From now on normalizer is computed recursively */
+ for( d = min_lag_4kHz + 1; d <= max_lag_4kHz; d++ ) {
+ basis_ptr--;
+
+ /* Check that we are within range of the array */
+ SKP_assert( basis_ptr >= signal_4kHz );
+ SKP_assert( basis_ptr + sf_length_8kHz <= signal_4kHz + frame_length_4kHz );
+
+ cross_corr = SKP_Silk_inner_prod_aligned( target_ptr, basis_ptr, sf_length_8kHz );
+
+ /* Add contribution of new sample and remove contribution from oldest sample */
+ normalizer +=
+ SKP_SMULBB( basis_ptr[ 0 ], basis_ptr[ 0 ] ) -
+ SKP_SMULBB( basis_ptr[ sf_length_8kHz ], basis_ptr[ sf_length_8kHz ] );
+
+ temp32 = SKP_DIV32( cross_corr, SKP_Silk_SQRT_APPROX( normalizer ) + 1 );
+ C[ k ][ d ] = (SKP_int16)SKP_SAT16( temp32 ); /* Q0 */
+ }
+ /* Update target pointer */
+ target_ptr += sf_length_8kHz;
+ }
+
+ /* Combine two subframes into single correlation measure and apply short-lag bias */
+ if( nb_subfr == PE_MAX_NB_SUBFR ) {
+ for( i = max_lag_4kHz; i >= min_lag_4kHz; i-- ) {
+ sum = (SKP_int32)C[ 0 ][ i ] + (SKP_int32)C[ 1 ][ i ]; /* Q0 */
+ SKP_assert( SKP_RSHIFT( sum, 1 ) == SKP_SAT16( SKP_RSHIFT( sum, 1 ) ) );
+ sum = SKP_RSHIFT( sum, 1 ); /* Q-1 */
+ SKP_assert( SKP_LSHIFT( (SKP_int32)-i, 4 ) == SKP_SAT16( SKP_LSHIFT( (SKP_int32)-i, 4 ) ) );
+ sum = SKP_SMLAWB( sum, sum, SKP_LSHIFT( -i, 4 ) ); /* Q-1 */
+ SKP_assert( sum == SKP_SAT16( sum ) );
+ C[ 0 ][ i ] = (SKP_int16)sum; /* Q-1 */
+ }
+ } else {
+ /* Only short-lag bias */
+ for( i = max_lag_4kHz; i >= min_lag_4kHz; i-- ) {
+ sum = (SKP_int32)C[ 0 ][ i ];
+ sum = SKP_SMLAWB( sum, sum, SKP_LSHIFT( -i, 4 ) ); /* Q-1 */
+ C[ 0 ][ i ] = (SKP_int16)sum; /* Q-1 */
+ }
+ }
+
+ /* Sort */
+ length_d_srch = SKP_ADD_LSHIFT32( 4, complexity, 1 );
+ SKP_assert( 3 * length_d_srch <= PE_D_SRCH_LENGTH );
+ SKP_Silk_insertion_sort_decreasing_int16( &C[ 0 ][ min_lag_4kHz ], d_srch, max_lag_4kHz - min_lag_4kHz + 1, length_d_srch );
+
+ /* Escape if correlation is very low already here */
+ target_ptr = &signal_4kHz[ SKP_SMULBB( sf_length_4kHz, nb_subfr ) ];
+ energy = SKP_Silk_inner_prod_aligned( target_ptr, target_ptr, SKP_LSHIFT( sf_length_4kHz, 2 ) );
+ energy = SKP_ADD_SAT32( energy, 1000 ); /* Q0 */
+ Cmax = (SKP_int)C[ 0 ][ min_lag_4kHz ]; /* Q-1 */
+ threshold = SKP_SMULBB( Cmax, Cmax ); /* Q-2 */
+
+ /* Compare in Q-2 domain */
+ if( SKP_RSHIFT( energy, 4 + 2 ) > threshold ) {
+ SKP_memset( pitch_out, 0, nb_subfr * sizeof( SKP_int ) );
+ *LTPCorr_Q15 = 0;
+ *lagIndex = 0;
+ *contourIndex = 0;
+ return 1;
+ }
+
+ threshold = SKP_SMULWB( search_thres1_Q16, Cmax );
+ for( i = 0; i < length_d_srch; i++ ) {
+ /* Convert to 8 kHz indices for the sorted correlation that exceeds the threshold */
+ if( C[ 0 ][ min_lag_4kHz + i ] > threshold ) {
+ d_srch[ i ] = SKP_LSHIFT( d_srch[ i ] + min_lag_4kHz, 1 );
+ } else {
+ length_d_srch = i;
+ break;
+ }
+ }
+ SKP_assert( length_d_srch > 0 );
+
+ for( i = min_lag_8kHz - 5; i < max_lag_8kHz + 5; i++ ) {
+ d_comp[ i ] = 0;
+ }
+ for( i = 0; i < length_d_srch; i++ ) {
+ d_comp[ d_srch[ i ] ] = 1;
+ }
+
+ /* Convolution */
+ for( i = max_lag_8kHz + 3; i >= min_lag_8kHz; i-- ) {
+ d_comp[ i ] += d_comp[ i - 1 ] + d_comp[ i - 2 ];
+ }
+
+ length_d_srch = 0;
+ for( i = min_lag_8kHz; i < max_lag_8kHz + 1; i++ ) {
+ if( d_comp[ i + 1 ] > 0 ) {
+ d_srch[ length_d_srch ] = i;
+ length_d_srch++;
+ }
+ }
+
+ /* Convolution */
+ for( i = max_lag_8kHz + 3; i >= min_lag_8kHz; i-- ) {
+ d_comp[ i ] += d_comp[ i - 1 ] + d_comp[ i - 2 ] + d_comp[ i - 3 ];
+ }
+
+ length_d_comp = 0;
+ for( i = min_lag_8kHz; i < max_lag_8kHz + 4; i++ ) {
+ if( d_comp[ i ] > 0 ) {
+ d_comp[ length_d_comp ] = i - 2;
+ length_d_comp++;
+ }
+ }
+
+ /**********************************************************************************
+ ** SECOND STAGE, operating at 8 kHz, on lag sections with high correlation
+ *************************************************************************************/
+
+ /******************************************************************************
+ ** Scale signal down to avoid correlations measures from overflowing
+ *******************************************************************************/
+ /* find scaling as max scaling for each subframe */
+ shift = SKP_FIX_P_Ana_find_scaling( signal_8kHz, frame_length_8kHz, sf_length_8kHz );
+ if( shift > 0 ) {
+ for( i = 0; i < frame_length_8kHz; i++ ) {
+ signal_8kHz[ i ] = SKP_RSHIFT( signal_8kHz[ i ], shift );
+ }
+ }
+
+ /*********************************************************************************
+ * Find energy of each subframe projected onto its history, for a range of delays
+ *********************************************************************************/
+ SKP_memset( C, 0, PE_MAX_NB_SUBFR * ( ( PE_MAX_LAG >> 1 ) + 5 ) * sizeof( SKP_int16 ) );
+
+ target_ptr = &signal_8kHz[ PE_LTP_MEM_LENGTH_MS * 8 ];
+ for( k = 0; k < nb_subfr; k++ ) {
+
+ /* Check that we are within range of the array */
+ SKP_assert( target_ptr >= signal_8kHz );
+ SKP_assert( target_ptr + sf_length_8kHz <= signal_8kHz + frame_length_8kHz );
+
+ energy_target = SKP_Silk_inner_prod_aligned( target_ptr, target_ptr, sf_length_8kHz );
+ // ToDo: Calculate 1 / energy_target here and save one division inside next for loop
+ for( j = 0; j < length_d_comp; j++ ) {
+ d = d_comp[ j ];
+ basis_ptr = target_ptr - d;
+
+ /* Check that we are within range of the array */
+ SKP_assert( basis_ptr >= signal_8kHz );
+ SKP_assert( basis_ptr + sf_length_8kHz <= signal_8kHz + frame_length_8kHz );
+
+ cross_corr = SKP_Silk_inner_prod_aligned( target_ptr, basis_ptr, sf_length_8kHz );
+ energy_basis = SKP_Silk_inner_prod_aligned( basis_ptr, basis_ptr, sf_length_8kHz );
+ if( cross_corr > 0 ) {
+ energy = SKP_max( energy_target, energy_basis ); /* Find max to make sure first division < 1.0 */
+ lz = SKP_Silk_CLZ32( cross_corr );
+ lshift = SKP_LIMIT_32( lz - 1, 0, 15 );
+ temp32 = SKP_DIV32( SKP_LSHIFT( cross_corr, lshift ), SKP_RSHIFT( energy, 15 - lshift ) + 1 ); /* Q15 */
+ SKP_assert( temp32 == SKP_SAT16( temp32 ) );
+ temp32 = SKP_SMULWB( cross_corr, temp32 ); /* Q(-1), cc * ( cc / max(b, t) ) */
+ temp32 = SKP_ADD_SAT32( temp32, temp32 ); /* Q(0) */
+ lz = SKP_Silk_CLZ32( temp32 );
+ lshift = SKP_LIMIT_32( lz - 1, 0, 15 );
+ energy = SKP_min( energy_target, energy_basis );
+ C[ k ][ d ] = SKP_DIV32( SKP_LSHIFT( temp32, lshift ), SKP_RSHIFT( energy, 15 - lshift ) + 1 ); // Q15
+ } else {
+ C[ k ][ d ] = 0;
+ }
+ }
+ target_ptr += sf_length_8kHz;
+ }
+
+ /* search over lag range and lags codebook */
+ /* scale factor for lag codebook, as a function of center lag */
+
+ CCmax = SKP_int32_MIN;
+ CCmax_b = SKP_int32_MIN;
+
+ CBimax = 0; /* To avoid returning undefined lag values */
+ lag = -1; /* To check if lag with strong enough correlation has been found */
+
+ if( prevLag > 0 ) {
+ if( Fs_kHz == 12 ) {
+ prevLag = SKP_DIV32_16( SKP_LSHIFT( prevLag, 1 ), 3 );
+ } else if( Fs_kHz == 16 ) {
+ prevLag = SKP_RSHIFT( prevLag, 1 );
+ }
+ prevLag_log2_Q7 = SKP_Silk_lin2log( (SKP_int32)prevLag );
+ } else {
+ prevLag_log2_Q7 = 0;
+ }
+ SKP_assert( search_thres2_Q15 == SKP_SAT16( search_thres2_Q15 ) );
+ /* Setup stage 2 codebook based on number of subframes */
+ if( nb_subfr == PE_MAX_NB_SUBFR ) {
+ cbk_size = PE_NB_CBKS_STAGE2_EXT;
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage2[ 0 ][ 0 ];
+ if( Fs_kHz == 8 && complexity > SKP_Silk_PE_MIN_COMPLEX ) {
+ /* If input is 8 khz use a larger codebook here because it is last stage */
+ nb_cbk_search = PE_NB_CBKS_STAGE2_EXT;
+ } else {
+ nb_cbk_search = PE_NB_CBKS_STAGE2;
+ }
+ corr_thres_Q15 = SKP_RSHIFT( SKP_SMULBB( search_thres2_Q15, search_thres2_Q15 ), 13 );
+ } else {
+ cbk_size = PE_NB_CBKS_STAGE2_10MS;
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage2_10_ms[ 0 ][ 0 ];
+ nb_cbk_search = PE_NB_CBKS_STAGE2_10MS;
+ corr_thres_Q15 = SKP_RSHIFT( SKP_SMULBB( search_thres2_Q15, search_thres2_Q15 ), 14 );
+ }
+
+ for( k = 0; k < length_d_srch; k++ ) {
+ d = d_srch[ k ];
+ for( j = 0; j < nb_cbk_search; j++ ) {
+ CC[ j ] = 0;
+ for( i = 0; i < nb_subfr; i++ ) {
+ /* Try all codebooks */
+ CC[ j ] = CC[ j ] + (SKP_int32)C[ i ][ d + matrix_ptr( Lag_CB_ptr, i, j, cbk_size )];
+ }
+ }
+ /* Find best codebook */
+ CCmax_new = SKP_int32_MIN;
+ CBimax_new = 0;
+ for( i = 0; i < nb_cbk_search; i++ ) {
+ if( CC[ i ] > CCmax_new ) {
+ CCmax_new = CC[ i ];
+ CBimax_new = i;
+ }
+ }
+
+ /* Bias towards shorter lags */
+ lag_log2_Q7 = SKP_Silk_lin2log( (SKP_int32)d ); /* Q7 */
+ SKP_assert( lag_log2_Q7 == SKP_SAT16( lag_log2_Q7 ) );
+ SKP_assert( nb_subfr * SKP_FIX_CONST( PE_SHORTLAG_BIAS, 15 ) == SKP_SAT16( nb_subfr * SKP_FIX_CONST( PE_SHORTLAG_BIAS, 15 ) ) );
+ CCmax_new_b = CCmax_new - SKP_RSHIFT( SKP_SMULBB( nb_subfr * SKP_FIX_CONST( PE_SHORTLAG_BIAS, 15 ), lag_log2_Q7 ), 7 ); /* Q15 */
+
+ /* Bias towards previous lag */
+ SKP_assert( nb_subfr * SKP_FIX_CONST( PE_PREVLAG_BIAS, 15 ) == SKP_SAT16( nb_subfr * SKP_FIX_CONST( PE_PREVLAG_BIAS, 15 ) ) );
+ if( prevLag > 0 ) {
+ delta_lag_log2_sqr_Q7 = lag_log2_Q7 - prevLag_log2_Q7;
+ SKP_assert( delta_lag_log2_sqr_Q7 == SKP_SAT16( delta_lag_log2_sqr_Q7 ) );
+ delta_lag_log2_sqr_Q7 = SKP_RSHIFT( SKP_SMULBB( delta_lag_log2_sqr_Q7, delta_lag_log2_sqr_Q7 ), 7 );
+ prev_lag_bias_Q15 = SKP_RSHIFT( SKP_SMULBB( nb_subfr * SKP_FIX_CONST( PE_PREVLAG_BIAS, 15 ), *LTPCorr_Q15 ), 15 ); /* Q15 */
+ prev_lag_bias_Q15 = SKP_DIV32( SKP_MUL( prev_lag_bias_Q15, delta_lag_log2_sqr_Q7 ), delta_lag_log2_sqr_Q7 + ( 1 << 6 ) );
+ CCmax_new_b -= prev_lag_bias_Q15; /* Q15 */
+ }
+
+ if ( CCmax_new_b > CCmax_b && /* Find maximum biased correlation */
+ CCmax_new > corr_thres_Q15 && /* Correlation needs to be high enough to be voiced */
+ SKP_Silk_CB_lags_stage2[ 0 ][ CBimax_new ] <= min_lag_8kHz /* Lag must be in range */
+ ) {
+ CCmax_b = CCmax_new_b;
+ CCmax = CCmax_new;
+ lag = d;
+ CBimax = CBimax_new;
+ }
+ }
+
+ if( lag == -1 ) {
+ /* No suitable candidate found */
+ SKP_memset( pitch_out, 0, nb_subfr * sizeof( SKP_int ) );
+ *LTPCorr_Q15 = 0;
+ *lagIndex = 0;
+ *contourIndex = 0;
+ return 1;
+ }
+
+ if( Fs_kHz > 8 ) {
+
+ /******************************************************************************
+ ** Scale input signal down to avoid correlations measures from overflowing
+ *******************************************************************************/
+ /* find scaling as max scaling for each subframe */
+ shift = SKP_FIX_P_Ana_find_scaling( signal, frame_length, sf_length );
+ if( shift > 0 ) {
+ /* Move signal to scratch mem because the input signal should be unchanged */
+ /* Reuse the 32 bit scratch mem vector, use a 16 bit pointer from now */
+ input_signal_ptr = (SKP_int16*)scratch_mem;
+ for( i = 0; i < frame_length; i++ ) {
+ input_signal_ptr[ i ] = SKP_RSHIFT( signal[ i ], shift );
+ }
+ } else {
+ input_signal_ptr = (SKP_int16*)signal;
+ }
+ /*********************************************************************************/
+
+ /* Search in original signal */
+
+ CBimax_old = CBimax;
+ /* Compensate for decimation */
+ SKP_assert( lag == SKP_SAT16( lag ) );
+ if( Fs_kHz == 12 ) {
+ lag = SKP_RSHIFT( SKP_SMULBB( lag, 3 ), 1 );
+ } else if( Fs_kHz == 16 ) {
+ lag = SKP_LSHIFT( lag, 1 );
+ } else {
+ lag = SKP_SMULBB( lag, 3 );
+ }
+
+ lag = SKP_LIMIT_int( lag, min_lag, max_lag );
+ start_lag = SKP_max_int( lag - 2, min_lag );
+ end_lag = SKP_min_int( lag + 2, max_lag );
+ lag_new = lag; /* to avoid undefined lag */
+ CBimax = 0; /* to avoid undefined lag */
+ SKP_assert( SKP_LSHIFT( CCmax, 13 ) >= 0 );
+ *LTPCorr_Q15 = (SKP_int)SKP_Silk_SQRT_APPROX( SKP_LSHIFT( CCmax, 13 ) ); /* Output normalized correlation */
+
+ CCmax = SKP_int32_MIN;
+ /* pitch lags according to second stage */
+ for( k = 0; k < nb_subfr; k++ ) {
+ pitch_out[ k ] = lag + 2 * SKP_Silk_CB_lags_stage2[ k ][ CBimax_old ];
+ }
+ /* Calculate the correlations and energies needed in stage 3 */
+ SKP_FIX_P_Ana_calc_corr_st3( crosscorr_st3, input_signal_ptr, start_lag, sf_length, nb_subfr, complexity );
+ SKP_FIX_P_Ana_calc_energy_st3( energies_st3, input_signal_ptr, start_lag, sf_length, nb_subfr, complexity );
+
+ lag_counter = 0;
+ SKP_assert( lag == SKP_SAT16( lag ) );
+ contour_bias_Q20 = SKP_DIV32_16( SKP_FIX_CONST( PE_FLATCONTOUR_BIAS, 20 ), lag );
+
+ /* Setup cbk parameters acording to complexity setting and frame length */
+ if( nb_subfr == PE_MAX_NB_SUBFR ) {
+ nb_cbk_search = (SKP_int)SKP_Silk_nb_cbk_searchs_stage3[ complexity ];
+ cbk_size = PE_NB_CBKS_STAGE3_MAX;
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage3[ 0 ][ 0 ];
+ } else {
+ nb_cbk_search = PE_NB_CBKS_STAGE3_10MS;
+ cbk_size = PE_NB_CBKS_STAGE3_10MS;
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage3_10_ms[ 0 ][ 0 ];
+ }
+ for( d = start_lag; d <= end_lag; d++ ) {
+ for( j = 0; j < nb_cbk_search; j++ ) {
+ cross_corr = 0;
+ energy = 0;
+ for( k = 0; k < nb_subfr; k++ ) {
+ SKP_assert( PE_MAX_NB_SUBFR == 4 );
+ energy += SKP_RSHIFT( energies_st3[ k ][ j ][ lag_counter ], 2 ); /* use mean, to avoid overflow */
+ SKP_assert( energy >= 0 );
+ cross_corr += SKP_RSHIFT( crosscorr_st3[ k ][ j ][ lag_counter ], 2 ); /* use mean, to avoid overflow */
+ }
+ if( cross_corr > 0 ) {
+ /* Divide cross_corr / energy and get result in Q15 */
+ lz = SKP_Silk_CLZ32( cross_corr );
+ /* Divide with result in Q13, cross_corr could be larger than energy */
+ lshift = SKP_LIMIT_32( lz - 1, 0, 13 );
+ CCmax_new = SKP_DIV32( SKP_LSHIFT( cross_corr, lshift ), SKP_RSHIFT( energy, 13 - lshift ) + 1 );
+ CCmax_new = SKP_SAT16( CCmax_new );
+ CCmax_new = SKP_SMULWB( cross_corr, CCmax_new );
+ /* Saturate */
+ if( CCmax_new > SKP_RSHIFT( SKP_int32_MAX, 3 ) ) {
+ CCmax_new = SKP_int32_MAX;
+ } else {
+ CCmax_new = SKP_LSHIFT( CCmax_new, 3 );
+ }
+ /* Reduce depending on flatness of contour */
+ diff = SKP_int16_MAX - SKP_RSHIFT( SKP_MUL( contour_bias_Q20, j ), 5 ); /* Q20 -> Q15 */
+ SKP_assert( diff == SKP_SAT16( diff ) );
+ CCmax_new = SKP_LSHIFT( SKP_SMULWB( CCmax_new, diff ), 1 );
+ } else {
+ CCmax_new = 0;
+ }
+
+ if( CCmax_new > CCmax &&
+ ( d + SKP_Silk_CB_lags_stage3[ 0 ][ j ] ) <= max_lag
+ ) {
+ CCmax = CCmax_new;
+ lag_new = d;
+ CBimax = j;
+ }
+ }
+ lag_counter++;
+ }
+
+ for( k = 0; k < nb_subfr; k++ ) {
+ pitch_out[ k ] = lag_new + matrix_ptr( Lag_CB_ptr, k, CBimax, cbk_size );
+ }
+ *lagIndex = (SKP_int16)( lag_new - min_lag);
+ *contourIndex = (SKP_int8)CBimax;
+ } else {
+ /* Save Lags and correlation */
+ CCmax = SKP_max( CCmax, 0 );
+ *LTPCorr_Q15 = (SKP_int)SKP_Silk_SQRT_APPROX( SKP_LSHIFT( CCmax, 13 ) ); /* Output normalized correlation */
+ for( k = 0; k < nb_subfr; k++ ) {
+ pitch_out[ k ] = lag + matrix_ptr( Lag_CB_ptr, k, CBimax, cbk_size );
+ }
+ *lagIndex = (SKP_int16)( lag - min_lag_8kHz );
+ *contourIndex = (SKP_int8)CBimax;
+ }
+ SKP_assert( *lagIndex >= 0 );
+ /* return as voiced */
+ return 0;
+}
+
+/*************************************************************************/
+/* Calculates the correlations used in stage 3 search. In order to cover */
+/* the whole lag codebook for all the searched offset lags (lag +- 2), */
+/*************************************************************************/
+void SKP_FIX_P_Ana_calc_corr_st3(
+ SKP_int32 cross_corr_st3[ PE_MAX_NB_SUBFR ][ PE_NB_CBKS_STAGE3_MAX ][ PE_NB_STAGE3_LAGS ],/* (O) 3 DIM correlation array */
+ const SKP_int16 signal[], /* I vector to correlate */
+ SKP_int start_lag, /* I lag offset to search around */
+ SKP_int sf_length, /* I length of a 5 ms subframe */
+ SKP_int nb_subfr, /* I number of subframes */
+ SKP_int complexity /* I Complexity setting */
+)
+{
+ const SKP_int16 *target_ptr, *basis_ptr;
+ SKP_int32 cross_corr;
+ SKP_int i, j, k, lag_counter, lag_low, lag_high;
+ SKP_int nb_cbk_search, delta, idx, cbk_size;
+ SKP_int32 scratch_mem[ SCRATCH_SIZE ];
+ const SKP_int8 *Lag_range_ptr, *Lag_CB_ptr;
+
+ SKP_assert( complexity >= SKP_Silk_PE_MIN_COMPLEX );
+ SKP_assert( complexity <= SKP_Silk_PE_MAX_COMPLEX );
+
+ if( nb_subfr == PE_MAX_NB_SUBFR ){
+ Lag_range_ptr = &SKP_Silk_Lag_range_stage3[ complexity ][ 0 ][ 0 ];
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage3[ 0 ][ 0 ];
+ nb_cbk_search = SKP_Silk_nb_cbk_searchs_stage3[ complexity ];
+ cbk_size = PE_NB_CBKS_STAGE3_MAX;
+ } else {
+ SKP_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1);
+ Lag_range_ptr = &SKP_Silk_Lag_range_stage3_10_ms[ 0 ][ 0 ];
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage3_10_ms[ 0 ][ 0 ];
+ nb_cbk_search = PE_NB_CBKS_STAGE3_10MS;
+ cbk_size = PE_NB_CBKS_STAGE3_10MS;
+ }
+
+ target_ptr = &signal[ SKP_LSHIFT( sf_length, 2 ) ]; /* Pointer to middle of frame */
+ for( k = 0; k < nb_subfr; k++ ) {
+ lag_counter = 0;
+
+ /* Calculate the correlations for each subframe */
+ lag_low = matrix_ptr( Lag_range_ptr, k, 0, 2 );
+ lag_high = matrix_ptr( Lag_range_ptr, k, 1, 2 );
+ for( j = lag_low; j <= lag_high; j++ ) {
+ basis_ptr = target_ptr - ( start_lag + j );
+ cross_corr = SKP_Silk_inner_prod_aligned( (SKP_int16*)target_ptr, (SKP_int16*)basis_ptr, sf_length );
+ SKP_assert( lag_counter < SCRATCH_SIZE );
+ scratch_mem[ lag_counter ] = cross_corr;
+ lag_counter++;
+ }
+
+ delta = matrix_ptr( Lag_range_ptr, k, 0, 2 );
+ for( i = 0; i < nb_cbk_search; i++ ) {
+ /* Fill out the 3 dim array that stores the correlations for */
+ /* each code_book vector for each start lag */
+ idx = matrix_ptr( Lag_CB_ptr, k, i, cbk_size ) - delta;
+ for( j = 0; j < PE_NB_STAGE3_LAGS; j++ ) {
+ SKP_assert( idx + j < SCRATCH_SIZE );
+ SKP_assert( idx + j < lag_counter );
+ cross_corr_st3[ k ][ i ][ j ] = scratch_mem[ idx + j ];
+ }
+ }
+ target_ptr += sf_length;
+ }
+}
+
+/********************************************************************/
+/* Calculate the energies for first two subframes. The energies are */
+/* calculated recursively. */
+/********************************************************************/
+void SKP_FIX_P_Ana_calc_energy_st3(
+ SKP_int32 energies_st3[ PE_MAX_NB_SUBFR ][ PE_NB_CBKS_STAGE3_MAX ][ PE_NB_STAGE3_LAGS ],/* (O) 3 DIM energy array */
+ const SKP_int16 signal[], /* I vector to calc energy in */
+ SKP_int start_lag, /* I lag offset to search around */
+ SKP_int sf_length, /* I length of one 5 ms subframe */
+ SKP_int nb_subfr, /* I number of subframes */
+ SKP_int complexity /* I Complexity setting */
+)
+{
+ const SKP_int16 *target_ptr, *basis_ptr;
+ SKP_int32 energy;
+ SKP_int k, i, j, lag_counter;
+ SKP_int nb_cbk_search, delta, idx, cbk_size, lag_diff;
+ SKP_int32 scratch_mem[ SCRATCH_SIZE ];
+ const SKP_int8 *Lag_range_ptr, *Lag_CB_ptr;
+
+ SKP_assert( complexity >= SKP_Silk_PE_MIN_COMPLEX );
+ SKP_assert( complexity <= SKP_Silk_PE_MAX_COMPLEX );
+
+ if( nb_subfr == PE_MAX_NB_SUBFR ){
+ Lag_range_ptr = &SKP_Silk_Lag_range_stage3[ complexity ][ 0 ][ 0 ];
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage3[ 0 ][ 0 ];
+ nb_cbk_search = SKP_Silk_nb_cbk_searchs_stage3[ complexity ];
+ cbk_size = PE_NB_CBKS_STAGE3_MAX;
+ } else {
+ SKP_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1);
+ Lag_range_ptr = &SKP_Silk_Lag_range_stage3_10_ms[ 0 ][ 0 ];
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage3_10_ms[ 0 ][ 0 ];
+ nb_cbk_search = PE_NB_CBKS_STAGE3_10MS;
+ cbk_size = PE_NB_CBKS_STAGE3_10MS;
+ }
+ target_ptr = &signal[ SKP_LSHIFT( sf_length, 2 ) ];
+ for( k = 0; k < nb_subfr; k++ ) {
+ lag_counter = 0;
+
+ /* Calculate the energy for first lag */
+ basis_ptr = target_ptr - ( start_lag + matrix_ptr( Lag_range_ptr, k, 0, 2 ) );
+ energy = SKP_Silk_inner_prod_aligned( basis_ptr, basis_ptr, sf_length );
+ SKP_assert( energy >= 0 );
+ scratch_mem[ lag_counter ] = energy;
+ lag_counter++;
+
+ lag_diff = ( matrix_ptr( Lag_range_ptr, k, 1, 2 ) - matrix_ptr( Lag_range_ptr, k, 0, 2 ) + 1 );
+ for( i = 1; i < lag_diff; i++ ) {
+ /* remove part outside new window */
+ energy -= SKP_SMULBB( basis_ptr[ sf_length - i ], basis_ptr[ sf_length - i ] );
+ SKP_assert( energy >= 0 );
+
+ /* add part that comes into window */
+ energy = SKP_ADD_SAT32( energy, SKP_SMULBB( basis_ptr[ -i ], basis_ptr[ -i ] ) );
+ SKP_assert( energy >= 0 );
+ SKP_assert( lag_counter < SCRATCH_SIZE );
+ scratch_mem[ lag_counter ] = energy;
+ lag_counter++;
+ }
+
+ delta = matrix_ptr( Lag_range_ptr, k, 0, 2 );
+ for( i = 0; i < nb_cbk_search; i++ ) {
+ /* Fill out the 3 dim array that stores the correlations for */
+ /* each code_book vector for each start lag */
+ idx = matrix_ptr( Lag_CB_ptr, k, i, cbk_size ) - delta;
+ for( j = 0; j < PE_NB_STAGE3_LAGS; j++ ) {
+ SKP_assert( idx + j < SCRATCH_SIZE );
+ SKP_assert( idx + j < lag_counter );
+ energies_st3[ k ][ i ][ j ] = scratch_mem[ idx + j ];
+ SKP_assert( energies_st3[ k ][ i ][ j ] >= 0 );
+ }
+ }
+ target_ptr += sf_length;
+ }
+}
+
+SKP_int32 SKP_FIX_P_Ana_find_scaling(
+ const SKP_int16 *signal,
+ const SKP_int signal_length,
+ const SKP_int sum_sqr_len
+)
+{
+ SKP_int32 nbits, x_max;
+
+ x_max = SKP_Silk_int16_array_maxabs( signal, signal_length );
+
+ if( x_max < SKP_int16_MAX ) {
+ /* Number of bits needed for the sum of the squares */
+ nbits = 32 - SKP_Silk_CLZ32( SKP_SMULBB( x_max, x_max ) );
+ } else {
+ /* Here we don't know if x_max should have been SKP_int16_MAX + 1, so we expect the worst case */
+ nbits = 30;
+ }
+ nbits += 17 - SKP_Silk_CLZ16( sum_sqr_len );
+
+ /* Without a guarantee of saturation, we need to keep the 31st bit free */
+ if( nbits < 31 ) {
+ return 0;
+ } else {
+ return( nbits - 30 );
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_pitch_est_defines.h
@@ -1,0 +1,87 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef SKP_SILK_PE_DEFINES_H
+#define SKP_SILK_PE_DEFINES_H
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+/************************************************************/
+/* Definitions For Fix pitch estimator */
+/************************************************************/
+
+#define PE_MAX_FS_KHZ 16 /* Maximum sampling frequency used */
+
+#define PE_MAX_NB_SUBFR 4
+#define PE_SUBFR_LENGTH_MS 5 /* 5 ms */
+
+#define PE_LTP_MEM_LENGTH_MS (4 * PE_SUBFR_LENGTH_MS)
+
+#define PE_MAX_FRAME_LENGTH_MS (PE_LTP_MEM_LENGTH_MS + PE_MAX_NB_SUBFR * PE_SUBFR_LENGTH_MS)
+#define PE_MAX_FRAME_LENGTH (PE_MAX_FRAME_LENGTH_MS * PE_MAX_FS_KHZ)
+#define PE_MAX_FRAME_LENGTH_ST_1 (PE_MAX_FRAME_LENGTH >> 2)
+#define PE_MAX_FRAME_LENGTH_ST_2 (PE_MAX_FRAME_LENGTH >> 1)
+#define PE_MAX_SF_FRAME_LENGTH (PE_SUB_FRAME * PE_MAX_FS_KHZ)
+
+#define PE_MAX_LAG_MS 18 /* 18 ms -> 56 Hz */
+#define PE_MIN_LAG_MS 2 /* 2 ms -> 500 Hz */
+#define PE_MAX_LAG (PE_MAX_LAG_MS * PE_MAX_FS_KHZ)
+#define PE_MIN_LAG (PE_MIN_LAG_MS * PE_MAX_FS_KHZ)
+
+#define PE_D_SRCH_LENGTH 24
+
+#define PE_NB_STAGE3_LAGS 5
+
+#define PE_NB_CBKS_STAGE2 3
+#define PE_NB_CBKS_STAGE2_EXT 11
+
+#define PE_CB_mn2 1
+#define PE_CB_mx2 2
+
+#define PE_NB_CBKS_STAGE3_MAX 34
+#define PE_NB_CBKS_STAGE3_MID 24
+#define PE_NB_CBKS_STAGE3_MIN 16
+
+#define PE_NB_CBKS_STAGE3_10MS 12
+#define PE_NB_CBKS_STAGE2_10MS 3
+
+#define PE_SHORTLAG_BIAS 0.2f /* for logarithmic weighting */
+#define PE_PREVLAG_BIAS 0.2f /* for logarithmic weighting */
+#define PE_FLATCONTOUR_BIAS 0.05f
+
+extern const SKP_int8 SKP_Silk_CB_lags_stage2[ PE_MAX_NB_SUBFR ][ PE_NB_CBKS_STAGE2_EXT ];
+extern const SKP_int8 SKP_Silk_CB_lags_stage3[ PE_MAX_NB_SUBFR ][ PE_NB_CBKS_STAGE3_MAX ];
+extern const SKP_int8 SKP_Silk_Lag_range_stage3[ SKP_Silk_PE_MAX_COMPLEX + 1 ] [ PE_MAX_NB_SUBFR ][ 2 ];
+extern const SKP_int8 SKP_Silk_nb_cbk_searchs_stage3[ SKP_Silk_PE_MAX_COMPLEX + 1 ];
+
+/* Tables added for 10 ms frames */
+extern const SKP_int8 SKP_Silk_CB_lags_stage2_10_ms[ PE_MAX_NB_SUBFR >> 1][ 3 ];
+extern const SKP_int8 SKP_Silk_CB_lags_stage3_10_ms[ PE_MAX_NB_SUBFR >> 1 ][ 12 ];
+extern const SKP_int8 SKP_Silk_Lag_range_stage3_10_ms[ PE_MAX_NB_SUBFR >> 1 ][ 2 ];
+
+#endif
+
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_pitch_est_tables.c
@@ -1,0 +1,95 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_typedef.h"
+#include "SKP_Silk_pitch_est_defines.h"
+
+const SKP_int8 SKP_Silk_CB_lags_stage2_10_ms[ PE_MAX_NB_SUBFR >> 1][ PE_NB_CBKS_STAGE2_10MS ] =
+{
+ {0, 1, 0},
+ {0, 0, 1}
+};
+
+const SKP_int8 SKP_Silk_CB_lags_stage3_10_ms[ PE_MAX_NB_SUBFR >> 1 ][ PE_NB_CBKS_STAGE3_10MS ] =
+{
+ { 0, 0, 1,-1, 1,-1, 2,-2, 2,-2, 3,-3},
+ { 0, 1, 0, 1,-1, 2,-1, 2,-2, 3,-2, 3}
+};
+
+const SKP_int8 SKP_Silk_Lag_range_stage3_10_ms[ PE_MAX_NB_SUBFR >> 1 ][ 2 ] =
+{
+ {-3, 7},
+ {-2, 7}
+};
+
+const SKP_int8 SKP_Silk_CB_lags_stage2[ PE_MAX_NB_SUBFR ][ PE_NB_CBKS_STAGE2_EXT ] =
+{
+ {0, 2,-1,-1,-1, 0, 0, 1, 1, 0, 1},
+ {0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0},
+ {0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0},
+ {0,-1, 2, 1, 0, 1, 1, 0, 0,-1,-1}
+};
+
+const SKP_int8 SKP_Silk_CB_lags_stage3[ PE_MAX_NB_SUBFR ][ PE_NB_CBKS_STAGE3_MAX ] =
+{
+ {0, 0, 1,-1, 0, 1,-1, 0,-1, 1,-2, 2,-2,-2, 2,-3, 2, 3,-3,-4, 3,-4, 4, 4,-5, 5,-6,-5, 6,-7, 6, 5, 8,-9},
+ {0, 0, 1, 0, 0, 0, 0, 0, 0, 0,-1, 1, 0, 0, 1,-1, 0, 1,-1,-1, 1,-1, 2, 1,-1, 2,-2,-2, 2,-2, 2, 2, 3,-3},
+ {0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1,-1, 1, 0, 0, 2, 1,-1, 2,-1,-1, 2,-1, 2, 2,-1, 3,-2,-2,-2, 3},
+ {0, 1, 0, 0, 1, 0, 1,-1, 2,-1, 2,-1, 2, 3,-2, 3,-2,-2, 4, 4,-3, 5,-3,-4, 6,-4, 6, 5,-5, 8,-6,-5,-7, 9}
+};
+
+const SKP_int8 SKP_Silk_Lag_range_stage3[ SKP_Silk_PE_MAX_COMPLEX + 1 ] [ PE_MAX_NB_SUBFR ][ 2 ] =
+{
+ /* Lags to search for low number of stage3 cbks */
+ {
+ {-5,8},
+ {-1,6},
+ {-1,6},
+ {-4,10}
+ },
+ /* Lags to search for middle number of stage3 cbks */
+ {
+ {-6,10},
+ {-2,6},
+ {-1,6},
+ {-5,10}
+ },
+ /* Lags to search for max number of stage3 cbks */
+ {
+ {-9,12},
+ {-3,7},
+ {-2,7},
+ {-7,13}
+ }
+};
+
+const SKP_int8 SKP_Silk_nb_cbk_searchs_stage3[ SKP_Silk_PE_MAX_COMPLEX + 1 ] =
+{
+ PE_NB_CBKS_STAGE3_MIN,
+ PE_NB_CBKS_STAGE3_MID,
+ PE_NB_CBKS_STAGE3_MAX
+};
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_resampler.c
@@ -1,0 +1,323 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * File Name: SKP_Silk_resampler.c *
+ * *
+ * Description: Interface to collection of resamplers *
+ * *
+ * Copyright 2010 (c), Skype Limited *
+ * All rights reserved. *
+ * */
+
+/* Matrix of resampling methods used:
+ * Fs_out (kHz)
+ * 8 12 16 24 32 44.1 48
+ *
+ * 8 C UF U UF UF UF UF
+ * 12 AF C UF U UF UF UF
+ * 16 D AF C UF U UF UF
+ * Fs_in (kHz) 24 AIF D AF C UF UF U
+ * 32 UF AF D AF C UF UF
+ * 44.1 AMI AMI AMI AMI AMI C UF
+ * 48 DAF DAF AF D AF UF C
+ *
+ * default method: UF
+ *
+ * C -> Copy (no resampling)
+ * D -> Allpass-based 2x downsampling
+ * U -> Allpass-based 2x upsampling
+ * DAF -> Allpass-based 2x downsampling followed by AR2 filter followed by FIR interpolation
+ * UF -> Allpass-based 2x upsampling followed by FIR interpolation
+ * AMI -> ARMA4 filter followed by FIR interpolation
+ * AF -> AR2 filter followed by FIR interpolation
+ *
+ * Input signals sampled above 48 kHz are first downsampled to at most 48 kHz.
+ * Output signals sampled above 48 kHz are upsampled from at most 48 kHz.
+ */
+
+#include "SKP_Silk_resampler_private.h"
+
+/* Greatest common divisor */
+static SKP_int32 gcd(
+ SKP_int32 a,
+ SKP_int32 b
+)
+{
+ SKP_int32 tmp;
+ while( b > 0 ) {
+ tmp = a - b * SKP_DIV32( a, b );
+ a = b;
+ b = tmp;
+ }
+ return a;
+}
+
+/* Initialize/reset the resampler state for a given pair of input/output sampling rates */
+SKP_int SKP_Silk_resampler_init(
+ SKP_Silk_resampler_state_struct *S, /* I/O: Resampler state */
+ SKP_int32 Fs_Hz_in, /* I: Input sampling rate (Hz) */
+ SKP_int32 Fs_Hz_out /* I: Output sampling rate (Hz) */
+)
+{
+ SKP_int32 cycleLen, cyclesPerBatch, up2 = 0, down2 = 0;
+
+ /* Clear state */
+ SKP_memset( S, 0, sizeof( SKP_Silk_resampler_state_struct ) );
+
+ /* Input checking */
+#if RESAMPLER_SUPPORT_ABOVE_48KHZ
+ if( Fs_Hz_in < 8000 || Fs_Hz_in > 192000 || Fs_Hz_out < 8000 || Fs_Hz_out > 192000 ) {
+#else
+ if( Fs_Hz_in < 8000 || Fs_Hz_in > 48000 || Fs_Hz_out < 8000 || Fs_Hz_out > 48000 ) {
+#endif
+ SKP_assert( 0 );
+ return -1;
+ }
+
+#if RESAMPLER_SUPPORT_ABOVE_48KHZ
+ /* Determine pre downsampling and post upsampling */
+ if( Fs_Hz_in > 96000 ) {
+ S->nPreDownsamplers = 2;
+ S->down_pre_function = SKP_Silk_resampler_private_down4;
+ } else if( Fs_Hz_in > 48000 ) {
+ S->nPreDownsamplers = 1;
+ S->down_pre_function = SKP_Silk_resampler_down2;
+ } else {
+ S->nPreDownsamplers = 0;
+ S->down_pre_function = NULL;
+ }
+
+ if( Fs_Hz_out > 96000 ) {
+ S->nPostUpsamplers = 2;
+ S->up_post_function = SKP_Silk_resampler_private_up4;
+ } else if( Fs_Hz_out > 48000 ) {
+ S->nPostUpsamplers = 1;
+ S->up_post_function = SKP_Silk_resampler_up2;
+ } else {
+ S->nPostUpsamplers = 0;
+ S->up_post_function = NULL;
+ }
+
+ if( S->nPreDownsamplers + S->nPostUpsamplers > 0 ) {
+ /* Ratio of output/input samples */
+ S->ratio_Q16 = SKP_LSHIFT32( SKP_DIV32( SKP_LSHIFT32( Fs_Hz_out, 13 ), Fs_Hz_in ), 3 );
+ /* Make sure the ratio is rounded up */
+ while( SKP_SMULWW( S->ratio_Q16, Fs_Hz_in ) < Fs_Hz_out ) S->ratio_Q16++;
+
+ /* Batch size is 10 ms */
+ S->batchSizePrePost = SKP_DIV32_16( Fs_Hz_in, 100 );
+
+ /* Convert sampling rate to those after pre-downsampling and before post-upsampling */
+ Fs_Hz_in = SKP_RSHIFT( Fs_Hz_in, S->nPreDownsamplers );
+ Fs_Hz_out = SKP_RSHIFT( Fs_Hz_out, S->nPostUpsamplers );
+ }
+#endif
+
+ /* Number of samples processed per batch */
+ /* First, try 10 ms frames */
+ S->batchSize = SKP_DIV32_16( Fs_Hz_in, 100 );
+ if( ( SKP_MUL( S->batchSize, 100 ) != Fs_Hz_in ) || ( Fs_Hz_in % 100 != 0 ) ) {
+ /* No integer number of input or output samples with 10 ms frames, use greatest common divisor */
+ cycleLen = SKP_DIV32( Fs_Hz_in, gcd( Fs_Hz_in, Fs_Hz_out ) );
+ cyclesPerBatch = SKP_DIV32( RESAMPLER_MAX_BATCH_SIZE_IN, cycleLen );
+ if( cyclesPerBatch == 0 ) {
+ /* cycleLen too big, let's just use the maximum batch size. Some distortion will result. */
+ S->batchSize = RESAMPLER_MAX_BATCH_SIZE_IN;
+ SKP_assert( 0 );
+ } else {
+ S->batchSize = SKP_MUL( cyclesPerBatch, cycleLen );
+ }
+ }
+
+
+ /* Find resampler with the right sampling ratio */
+ if( Fs_Hz_out > Fs_Hz_in ) {
+ /* Upsample */
+ if( Fs_Hz_out == SKP_MUL( Fs_Hz_in, 2 ) ) { /* Fs_out : Fs_in = 2 : 1 */
+ /* Special case: directly use 2x upsampler */
+ S->resampler_function = SKP_Silk_resampler_private_up2_HQ_wrapper;
+ } else {
+ /* Default resampler */
+ S->resampler_function = SKP_Silk_resampler_private_IIR_FIR;
+ up2 = 1;
+ if( Fs_Hz_in > 24000 ) {
+ /* Low-quality all-pass upsampler */
+ S->up2_function = SKP_Silk_resampler_up2;
+ } else {
+ /* High-quality all-pass upsampler */
+ S->up2_function = SKP_Silk_resampler_private_up2_HQ;
+ }
+ }
+ } else if ( Fs_Hz_out < Fs_Hz_in ) {
+ /* Downsample */
+ if( SKP_MUL( Fs_Hz_out, 4 ) == SKP_MUL( Fs_Hz_in, 3 ) ) { /* Fs_out : Fs_in = 3 : 4 */
+ S->FIR_Fracs = 3;
+ S->Coefs = SKP_Silk_Resampler_3_4_COEFS;
+ S->resampler_function = SKP_Silk_resampler_private_down_FIR;
+ } else if( SKP_MUL( Fs_Hz_out, 3 ) == SKP_MUL( Fs_Hz_in, 2 ) ) { /* Fs_out : Fs_in = 2 : 3 */
+ S->FIR_Fracs = 2;
+ S->Coefs = SKP_Silk_Resampler_2_3_COEFS;
+ S->resampler_function = SKP_Silk_resampler_private_down_FIR;
+ } else if( SKP_MUL( Fs_Hz_out, 2 ) == Fs_Hz_in ) { /* Fs_out : Fs_in = 1 : 2 */
+ S->FIR_Fracs = 1;
+ S->Coefs = SKP_Silk_Resampler_1_2_COEFS;
+ S->resampler_function = SKP_Silk_resampler_private_down_FIR;
+ } else if( SKP_MUL( Fs_Hz_out, 8 ) == SKP_MUL( Fs_Hz_in, 3 ) ) { /* Fs_out : Fs_in = 3 : 8 */
+ S->FIR_Fracs = 3;
+ S->Coefs = SKP_Silk_Resampler_3_8_COEFS;
+ S->resampler_function = SKP_Silk_resampler_private_down_FIR;
+ } else if( SKP_MUL( Fs_Hz_out, 3 ) == Fs_Hz_in ) { /* Fs_out : Fs_in = 1 : 3 */
+ S->FIR_Fracs = 1;
+ S->Coefs = SKP_Silk_Resampler_1_3_COEFS;
+ S->resampler_function = SKP_Silk_resampler_private_down_FIR;
+ } else if( SKP_MUL( Fs_Hz_out, 4 ) == Fs_Hz_in ) { /* Fs_out : Fs_in = 1 : 4 */
+ S->FIR_Fracs = 1;
+ down2 = 1;
+ S->Coefs = SKP_Silk_Resampler_1_2_COEFS;
+ S->resampler_function = SKP_Silk_resampler_private_down_FIR;
+ } else if( SKP_MUL( Fs_Hz_out, 6 ) == Fs_Hz_in ) { /* Fs_out : Fs_in = 1 : 6 */
+ S->FIR_Fracs = 1;
+ down2 = 1;
+ S->Coefs = SKP_Silk_Resampler_1_3_COEFS;
+ S->resampler_function = SKP_Silk_resampler_private_down_FIR;
+ } else if( SKP_MUL( Fs_Hz_out, 441 ) == SKP_MUL( Fs_Hz_in, 80 ) ) { /* Fs_out : Fs_in = 80 : 441 */
+ S->Coefs = SKP_Silk_Resampler_80_441_ARMA4_COEFS;
+ S->resampler_function = SKP_Silk_resampler_private_IIR_FIR;
+ } else if( SKP_MUL( Fs_Hz_out, 441 ) == SKP_MUL( Fs_Hz_in, 120 ) ) { /* Fs_out : Fs_in = 120 : 441 */
+ S->Coefs = SKP_Silk_Resampler_120_441_ARMA4_COEFS;
+ S->resampler_function = SKP_Silk_resampler_private_IIR_FIR;
+ } else if( SKP_MUL( Fs_Hz_out, 441 ) == SKP_MUL( Fs_Hz_in, 160 ) ) { /* Fs_out : Fs_in = 160 : 441 */
+ S->Coefs = SKP_Silk_Resampler_160_441_ARMA4_COEFS;
+ S->resampler_function = SKP_Silk_resampler_private_IIR_FIR;
+ } else if( SKP_MUL( Fs_Hz_out, 441 ) == SKP_MUL( Fs_Hz_in, 240 ) ) { /* Fs_out : Fs_in = 240 : 441 */
+ S->Coefs = SKP_Silk_Resampler_240_441_ARMA4_COEFS;
+ S->resampler_function = SKP_Silk_resampler_private_IIR_FIR;
+ } else if( SKP_MUL( Fs_Hz_out, 441 ) == SKP_MUL( Fs_Hz_in, 320 ) ) { /* Fs_out : Fs_in = 320 : 441 */
+ S->Coefs = SKP_Silk_Resampler_320_441_ARMA4_COEFS;
+ S->resampler_function = SKP_Silk_resampler_private_IIR_FIR;
+ } else {
+ /* Default resampler */
+ S->resampler_function = SKP_Silk_resampler_private_IIR_FIR;
+ up2 = 1;
+ if( Fs_Hz_in > 24000 ) {
+ /* Low-quality all-pass upsampler */
+ S->up2_function = SKP_Silk_resampler_up2;
+ } else {
+ /* High-quality all-pass upsampler */
+ S->up2_function = SKP_Silk_resampler_private_up2_HQ;
+ }
+ }
+ } else {
+ /* Input and output sampling rates are equal: copy */
+ S->resampler_function = SKP_Silk_resampler_private_copy;
+ }
+
+ S->input2x = up2 | down2;
+
+ /* Ratio of input/output samples */
+ S->invRatio_Q16 = SKP_LSHIFT32( SKP_DIV32( SKP_LSHIFT32( Fs_Hz_in, 14 + up2 - down2 ), Fs_Hz_out ), 2 );
+ /* Make sure the ratio is rounded up */
+ while( SKP_SMULWW( S->invRatio_Q16, SKP_LSHIFT32( Fs_Hz_out, down2 ) ) < SKP_LSHIFT32( Fs_Hz_in, up2 ) ) {
+ S->invRatio_Q16++;
+ }
+
+ S->magic_number = 123456789;
+
+ return 0;
+}
+
+/* Clear the states of all resampling filters, without resetting sampling rate ratio */
+SKP_int SKP_Silk_resampler_clear(
+ SKP_Silk_resampler_state_struct *S /* I/O: Resampler state */
+)
+{
+ /* Clear state */
+ SKP_memset( S->sDown2, 0, sizeof( S->sDown2 ) );
+ SKP_memset( S->sIIR, 0, sizeof( S->sIIR ) );
+ SKP_memset( S->sFIR, 0, sizeof( S->sFIR ) );
+#if RESAMPLER_SUPPORT_ABOVE_48KHZ
+ SKP_memset( S->sDownPre, 0, sizeof( S->sDownPre ) );
+ SKP_memset( S->sUpPost, 0, sizeof( S->sUpPost ) );
+#endif
+ return 0;
+}
+
+/* Resampler: convert from one sampling rate to another */
+SKP_int SKP_Silk_resampler(
+ SKP_Silk_resampler_state_struct *S, /* I/O: Resampler state */
+ SKP_int16 out[], /* O: Output signal */
+ const SKP_int16 in[], /* I: Input signal */
+ SKP_int32 inLen /* I: Number of input samples */
+)
+{
+ /* Verify that state was initialized and has not been corrupted */
+ if( S->magic_number != 123456789 ) {
+ SKP_assert( 0 );
+ return -1;
+ }
+
+#if RESAMPLER_SUPPORT_ABOVE_48KHZ
+ if( S->nPreDownsamplers + S->nPostUpsamplers > 0 ) {
+ /* The input and/or output sampling rate is above 48000 Hz */
+ SKP_int32 nSamplesIn, nSamplesOut;
+ SKP_int16 in_buf[ 480 ], out_buf[ 480 ];
+
+ while( inLen > 0 ) {
+ /* Number of input and output samples to process */
+ nSamplesIn = SKP_min( inLen, S->batchSizePrePost );
+ nSamplesOut = SKP_SMULWB( S->ratio_Q16, nSamplesIn );
+
+ SKP_assert( SKP_RSHIFT32( nSamplesIn, S->nPreDownsamplers ) <= 480 );
+ SKP_assert( SKP_RSHIFT32( nSamplesOut, S->nPostUpsamplers ) <= 480 );
+
+ if( S->nPreDownsamplers > 0 ) {
+ S->down_pre_function( S->sDownPre, in_buf, in, nSamplesIn );
+ if( S->nPostUpsamplers > 0 ) {
+ S->resampler_function( S, out_buf, in_buf, SKP_RSHIFT32( nSamplesIn, S->nPreDownsamplers ) );
+ S->up_post_function( S->sUpPost, out, out_buf, SKP_RSHIFT32( nSamplesOut, S->nPostUpsamplers ) );
+ } else {
+ S->resampler_function( S, out, in_buf, SKP_RSHIFT32( nSamplesIn, S->nPreDownsamplers ) );
+ }
+ } else {
+ S->resampler_function( S, out_buf, in, SKP_RSHIFT32( nSamplesIn, S->nPreDownsamplers ) );
+ S->up_post_function( S->sUpPost, out, out_buf, SKP_RSHIFT32( nSamplesOut, S->nPostUpsamplers ) );
+ }
+
+ in += nSamplesIn;
+ out += nSamplesOut;
+ inLen -= nSamplesIn;
+ }
+ } else
+#endif
+ {
+ /* Input and output sampling rate are at most 48000 Hz */
+ S->resampler_function( S, out, in, inLen );
+ }
+
+ return 0;
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_resampler_down2.c
@@ -1,0 +1,78 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_resampler_down2.c *
+ * *
+ * Downsample by a factor 2, mediocre quality *
+ * *
+ * Copyright 2010 (c), Skype Limited *
+ * */
+
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_resampler_rom.h"
+
+/* Downsample by a factor 2, mediocre quality */
+void SKP_Silk_resampler_down2(
+ SKP_int32 *S, /* I/O: State vector [ 2 ] */
+ SKP_int16 *out, /* O: Output signal [ len ] */
+ const SKP_int16 *in, /* I: Input signal [ floor(len/2) ] */
+ SKP_int32 inLen /* I: Number of input samples */
+)
+{
+ SKP_int32 k, len2 = SKP_RSHIFT32( inLen, 1 );
+ SKP_int32 in32, out32, Y, X;
+
+ SKP_assert( SKP_Silk_resampler_down2_0 > 0 );
+ SKP_assert( SKP_Silk_resampler_down2_1 < 0 );
+
+ /* Internal variables and state are in Q10 format */
+ for( k = 0; k < len2; k++ ) {
+ /* Convert to Q10 */
+ in32 = SKP_LSHIFT( (SKP_int32)in[ 2 * k ], 10 );
+
+ /* All-pass section for even input sample */
+ Y = SKP_SUB32( in32, S[ 0 ] );
+ X = SKP_SMLAWB( Y, Y, SKP_Silk_resampler_down2_1 );
+ out32 = SKP_ADD32( S[ 0 ], X );
+ S[ 0 ] = SKP_ADD32( in32, X );
+
+ /* Convert to Q10 */
+ in32 = SKP_LSHIFT( (SKP_int32)in[ 2 * k + 1 ], 10 );
+
+ /* All-pass section for odd input sample, and add to output of previous section */
+ Y = SKP_SUB32( in32, S[ 1 ] );
+ X = SKP_SMULWB( Y, SKP_Silk_resampler_down2_0 );
+ out32 = SKP_ADD32( out32, S[ 1 ] );
+ out32 = SKP_ADD32( out32, X );
+ S[ 1 ] = SKP_ADD32( in32, X );
+
+ /* Add, convert back to int16 and store to output */
+ out[ k ] = (SKP_int16)SKP_SAT16( SKP_RSHIFT_ROUND( out32, 11 ) );
+ }
+}
+
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_resampler_down2_3.c
@@ -1,0 +1,102 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_resampler_down2_3.c *
+ * *
+ * Downsample by a factor 2/3, low quality *
+ * *
+ * Copyright 2010 (c), Skype Limited *
+ * */
+
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_resampler_private.h"
+
+#define ORDER_FIR 4
+
+/* Downsample by a factor 2/3, low quality */
+void SKP_Silk_resampler_down2_3(
+ SKP_int32 *S, /* I/O: State vector [ 6 ] */
+ SKP_int16 *out, /* O: Output signal [ floor(2*inLen/3) ] */
+ const SKP_int16 *in, /* I: Input signal [ inLen ] */
+ SKP_int32 inLen /* I: Number of input samples */
+)
+{
+ SKP_int32 nSamplesIn, counter, res_Q6;
+ SKP_int32 buf[ RESAMPLER_MAX_BATCH_SIZE_IN + ORDER_FIR ];
+ SKP_int32 *buf_ptr;
+
+ /* Copy buffered samples to start of buffer */
+ SKP_memcpy( buf, S, ORDER_FIR * sizeof( SKP_int32 ) );
+
+ /* Iterate over blocks of frameSizeIn input samples */
+ while( 1 ) {
+ nSamplesIn = SKP_min( inLen, RESAMPLER_MAX_BATCH_SIZE_IN );
+
+ /* Second-order AR filter (output in Q8) */
+ SKP_Silk_resampler_private_AR2( &S[ ORDER_FIR ], &buf[ ORDER_FIR ], in,
+ SKP_Silk_Resampler_2_3_COEFS_LQ, nSamplesIn );
+
+ /* Interpolate filtered signal */
+ buf_ptr = buf;
+ counter = nSamplesIn;
+ while( counter > 2 ) {
+ /* Inner product */
+ res_Q6 = SKP_SMULWB( buf_ptr[ 0 ], SKP_Silk_Resampler_2_3_COEFS_LQ[ 2 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 1 ], SKP_Silk_Resampler_2_3_COEFS_LQ[ 3 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 2 ], SKP_Silk_Resampler_2_3_COEFS_LQ[ 5 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 3 ], SKP_Silk_Resampler_2_3_COEFS_LQ[ 4 ] );
+
+ /* Scale down, saturate and store in output array */
+ *out++ = (SKP_int16)SKP_SAT16( SKP_RSHIFT_ROUND( res_Q6, 6 ) );
+
+ res_Q6 = SKP_SMULWB( buf_ptr[ 1 ], SKP_Silk_Resampler_2_3_COEFS_LQ[ 4 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 2 ], SKP_Silk_Resampler_2_3_COEFS_LQ[ 5 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 3 ], SKP_Silk_Resampler_2_3_COEFS_LQ[ 3 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 4 ], SKP_Silk_Resampler_2_3_COEFS_LQ[ 2 ] );
+
+ /* Scale down, saturate and store in output array */
+ *out++ = (SKP_int16)SKP_SAT16( SKP_RSHIFT_ROUND( res_Q6, 6 ) );
+
+ buf_ptr += 3;
+ counter -= 3;
+ }
+
+ in += nSamplesIn;
+ inLen -= nSamplesIn;
+
+ if( inLen > 0 ) {
+ /* More iterations to do; copy last part of filtered signal to beginning of buffer */
+ SKP_memcpy( buf, &buf[ nSamplesIn ], ORDER_FIR * sizeof( SKP_int32 ) );
+ } else {
+ break;
+ }
+ }
+
+ /* Copy last part of filtered signal to the state for the next call */
+ SKP_memcpy( S, &buf[ nSamplesIn ], ORDER_FIR * sizeof( SKP_int32 ) );
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_resampler_down3.c
@@ -1,0 +1,93 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_resampler_down3.c *
+ * *
+ * Downsample by a factor 3, low quality *
+ * *
+ * Copyright 2010 (c), Skype Limited *
+ * */
+
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_resampler_private.h"
+
+#define ORDER_FIR 6
+
+/* Downsample by a factor 3, low quality */
+void SKP_Silk_resampler_down3(
+ SKP_int32 *S, /* I/O: State vector [ 8 ] */
+ SKP_int16 *out, /* O: Output signal [ floor(inLen/3) ] */
+ const SKP_int16 *in, /* I: Input signal [ inLen ] */
+ SKP_int32 inLen /* I: Number of input samples */
+)
+{
+ SKP_int32 nSamplesIn, counter, res_Q6;
+ SKP_int32 buf[ RESAMPLER_MAX_BATCH_SIZE_IN + ORDER_FIR ];
+ SKP_int32 *buf_ptr;
+
+ /* Copy buffered samples to start of buffer */
+ SKP_memcpy( buf, S, ORDER_FIR * sizeof( SKP_int32 ) );
+
+ /* Iterate over blocks of frameSizeIn input samples */
+ while( 1 ) {
+ nSamplesIn = SKP_min( inLen, RESAMPLER_MAX_BATCH_SIZE_IN );
+
+ /* Second-order AR filter (output in Q8) */
+ SKP_Silk_resampler_private_AR2( &S[ ORDER_FIR ], &buf[ ORDER_FIR ], in,
+ SKP_Silk_Resampler_1_3_COEFS_LQ, nSamplesIn );
+
+ /* Interpolate filtered signal */
+ buf_ptr = buf;
+ counter = nSamplesIn;
+ while( counter > 2 ) {
+ /* Inner product */
+ res_Q6 = SKP_SMULWB( SKP_ADD32( buf_ptr[ 0 ], buf_ptr[ 5 ] ), SKP_Silk_Resampler_1_3_COEFS_LQ[ 2 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, SKP_ADD32( buf_ptr[ 1 ], buf_ptr[ 4 ] ), SKP_Silk_Resampler_1_3_COEFS_LQ[ 3 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, SKP_ADD32( buf_ptr[ 2 ], buf_ptr[ 3 ] ), SKP_Silk_Resampler_1_3_COEFS_LQ[ 4 ] );
+
+ /* Scale down, saturate and store in output array */
+ *out++ = (SKP_int16)SKP_SAT16( SKP_RSHIFT_ROUND( res_Q6, 6 ) );
+
+ buf_ptr += 3;
+ counter -= 3;
+ }
+
+ in += nSamplesIn;
+ inLen -= nSamplesIn;
+
+ if( inLen > 0 ) {
+ /* More iterations to do; copy last part of filtered signal to beginning of buffer */
+ SKP_memcpy( buf, &buf[ nSamplesIn ], ORDER_FIR * sizeof( SKP_int32 ) );
+ } else {
+ break;
+ }
+ }
+
+ /* Copy last part of filtered signal to the state for the next call */
+ SKP_memcpy( S, &buf[ nSamplesIn ], ORDER_FIR * sizeof( SKP_int32 ) );
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_resampler_private.h
@@ -1,0 +1,131 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * File Name: SKP_Silk_resampler_structs.h *
+ * *
+ * Description: Structs for IIR/FIR resamplers *
+ * *
+ * Copyright 2010 (c), Skype Limited *
+ * All rights reserved. *
+ * *
+ * */
+
+#ifndef SKP_Silk_RESAMPLER_H
+#define SKP_Silk_RESAMPLER_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_resampler_structs.h"
+#include "SKP_Silk_resampler_rom.h"
+
+/* Number of input samples to process in the inner loop */
+#define RESAMPLER_MAX_BATCH_SIZE_IN 480
+
+/* Description: Hybrid IIR/FIR polyphase implementation of resampling */
+void SKP_Silk_resampler_private_IIR_FIR(
+ void *SS, /* I/O: Resampler state */
+ SKP_int16 out[], /* O: Output signal */
+ const SKP_int16 in[], /* I: Input signal */
+ SKP_int32 inLen /* I: Number of input samples */
+);
+
+/* Description: Hybrid IIR/FIR polyphase implementation of resampling */
+void SKP_Silk_resampler_private_down_FIR(
+ void *SS, /* I/O: Resampler state */
+ SKP_int16 out[], /* O: Output signal */
+ const SKP_int16 in[], /* I: Input signal */
+ SKP_int32 inLen /* I: Number of input samples */
+);
+
+/* Copy */
+void SKP_Silk_resampler_private_copy(
+ void *SS, /* I/O: Resampler state (unused) */
+ SKP_int16 out[], /* O: Output signal */
+ const SKP_int16 in[], /* I: Input signal */
+ SKP_int32 inLen /* I: Number of input samples */
+);
+
+/* Upsample by a factor 2, high quality */
+void SKP_Silk_resampler_private_up2_HQ_wrapper(
+ void *SS, /* I/O: Resampler state (unused) */
+ SKP_int16 *out, /* O: Output signal [ 2 * len ] */
+ const SKP_int16 *in, /* I: Input signal [ len ] */
+ SKP_int32 len /* I: Number of input samples */
+);
+
+/* Upsample by a factor 2, high quality */
+void SKP_Silk_resampler_private_up2_HQ(
+ SKP_int32 *S, /* I/O: Resampler state [ 6 ] */
+ SKP_int16 *out, /* O: Output signal [ 2 * len ] */
+ const SKP_int16 *in, /* I: Input signal [ len ] */
+ SKP_int32 len /* I: Number of input samples */
+);
+
+/* Upsample 4x, low quality */
+void SKP_Silk_resampler_private_up4(
+ SKP_int32 *S, /* I/O: State vector [ 2 ] */
+ SKP_int16 *out, /* O: Output signal [ 4 * len ] */
+ const SKP_int16 *in, /* I: Input signal [ len ] */
+ SKP_int32 len /* I: Number of input samples */
+);
+
+/* Downsample 4x, low quality */
+void SKP_Silk_resampler_private_down4(
+ SKP_int32 *S, /* I/O: State vector [ 2 ] */
+ SKP_int16 *out, /* O: Output signal [ floor(len/2) ] */
+ const SKP_int16 *in, /* I: Input signal [ len ] */
+ SKP_int32 inLen /* I: Number of input samples */
+);
+
+/* Second order AR filter */
+void SKP_Silk_resampler_private_AR2(
+ SKP_int32 S[], /* I/O: State vector [ 2 ] */
+ SKP_int32 out_Q8[], /* O: Output signal */
+ const SKP_int16 in[], /* I: Input signal */
+ const SKP_int16 A_Q14[], /* I: AR coefficients, Q14 */
+ SKP_int32 len /* I: Signal length */
+);
+
+/* Fourth order ARMA filter */
+void SKP_Silk_resampler_private_ARMA4(
+ SKP_int32 S[], /* I/O: State vector [ 4 ] */
+ SKP_int16 out[], /* O: Output signal */
+ const SKP_int16 in[], /* I: Input signal */
+ const SKP_int16 Coef[], /* I: ARMA coefficients [ 7 ] */
+ SKP_int32 len /* I: Signal length */
+);
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif // SKP_Silk_RESAMPLER_H
+
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_resampler_private_AR2.c
@@ -1,0 +1,59 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_resampler_private_AR2. c *
+ * *
+ * Second order AR filter with single delay elements *
+ * *
+ * Copyright 2010 (c), Skype Limited *
+ * */
+
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_resampler_private.h"
+
+/* Second order AR filter with single delay elements */
+void SKP_Silk_resampler_private_AR2(
+ SKP_int32 S[], /* I/O: State vector [ 2 ] */
+ SKP_int32 out_Q8[], /* O: Output signal */
+ const SKP_int16 in[], /* I: Input signal */
+ const SKP_int16 A_Q14[], /* I: AR coefficients, Q14 */
+ SKP_int32 len /* I: Signal length */
+)
+{
+ SKP_int32 k;
+ SKP_int32 out32;
+
+ for( k = 0; k < len; k++ ) {
+ out32 = SKP_ADD_LSHIFT32( S[ 0 ], (SKP_int32)in[ k ], 8 );
+ out_Q8[ k ] = out32;
+ out32 = SKP_LSHIFT( out32, 2 );
+ S[ 0 ] = SKP_SMLAWB( S[ 1 ], out32, A_Q14[ 0 ] );
+ S[ 1 ] = SKP_SMULWB( out32, A_Q14[ 1 ] );
+ }
+}
+
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_resampler_private_ARMA4.c
@@ -1,0 +1,78 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_resampler_private_ARMA4.c *
+ * *
+ * Fourth order ARMA filter, applies 64x gain *
+ * *
+ * Copyright 2010 (c), Skype Limited *
+ * */
+
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_resampler_private.h"
+
+/* Fourth order ARMA filter */
+/* Internally operates as two biquad filters in sequence. */
+
+/* Coeffients are stored in a packed format: */
+/* { B1_Q14[1], B2_Q14[1], -A1_Q14[1], -A1_Q14[2], -A2_Q14[1], -A2_Q14[2], gain_Q16 } */
+/* where it is assumed that B*_Q14[0], B*_Q14[2], A*_Q14[0] are all 16384 */
+void SKP_Silk_resampler_private_ARMA4(
+ SKP_int32 S[], /* I/O: State vector [ 4 ] */
+ SKP_int16 out[], /* O: Output signal */
+ const SKP_int16 in[], /* I: Input signal */
+ const SKP_int16 Coef[], /* I: ARMA coefficients [ 7 ] */
+ SKP_int32 len /* I: Signal length */
+)
+{
+ SKP_int32 k;
+ SKP_int32 in_Q8, out1_Q8, out2_Q8, X;
+
+ for( k = 0; k < len; k++ ) {
+ in_Q8 = SKP_LSHIFT32( (SKP_int32)in[ k ], 8 );
+
+ /* Outputs of first and second biquad */
+ out1_Q8 = SKP_ADD_LSHIFT32( in_Q8, S[ 0 ], 2 );
+ out2_Q8 = SKP_ADD_LSHIFT32( out1_Q8, S[ 2 ], 2 );
+
+ /* Update states, which are stored in Q6. Coefficients are in Q14 here */
+ X = SKP_SMLAWB( S[ 1 ], in_Q8, Coef[ 0 ] );
+ S[ 0 ] = SKP_SMLAWB( X, out1_Q8, Coef[ 2 ] );
+
+ X = SKP_SMLAWB( S[ 3 ], out1_Q8, Coef[ 1 ] );
+ S[ 2 ] = SKP_SMLAWB( X, out2_Q8, Coef[ 4 ] );
+
+ S[ 1 ] = SKP_SMLAWB( SKP_RSHIFT32( in_Q8, 2 ), out1_Q8, Coef[ 3 ] );
+ S[ 3 ] = SKP_SMLAWB( SKP_RSHIFT32( out1_Q8, 2 ), out2_Q8, Coef[ 5 ] );
+
+ /* Apply gain and store to output. The coefficient is in Q16 */
+ out[ k ] = (SKP_int16)SKP_SAT16( SKP_RSHIFT32( SKP_SMLAWB( 128, out2_Q8, Coef[ 6 ] ), 8 ) );
+ }
+}
+
+
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_resampler_private_IIR_FIR.c
@@ -1,0 +1,105 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * File Name: SKP_Silk_resampler_private_IIR_FIR.c *
+ * *
+ * Description: Hybrid IIR/FIR polyphase implementation of resampling *
+ * *
+ * Copyright 2010 (c), Skype Limited *
+ * All rights reserved. *
+ * */
+
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_resampler_private.h"
+SKP_INLINE SKP_int16 *SKP_Silk_resampler_private_IIR_FIR_INTERPOL(
+ SKP_int16 * out, SKP_int16 * buf, SKP_int32 max_index_Q16 , SKP_int32 index_increment_Q16 ){
+ SKP_int32 index_Q16, res_Q15;
+ SKP_int16 *buf_ptr;
+ SKP_int32 table_index;
+ /* Interpolate upsampled signal and store in output array */
+ for( index_Q16 = 0; index_Q16 < max_index_Q16; index_Q16 += index_increment_Q16 ) {
+ table_index = SKP_SMULWB( index_Q16 & 0xFFFF, 144 );
+ buf_ptr = &buf[ index_Q16 >> 16 ];
+
+ res_Q15 = SKP_SMULBB( buf_ptr[ 0 ], SKP_Silk_resampler_frac_FIR_144[ table_index ][ 0 ] );
+ res_Q15 = SKP_SMLABB( res_Q15, buf_ptr[ 1 ], SKP_Silk_resampler_frac_FIR_144[ table_index ][ 1 ] );
+ res_Q15 = SKP_SMLABB( res_Q15, buf_ptr[ 2 ], SKP_Silk_resampler_frac_FIR_144[ table_index ][ 2 ] );
+ res_Q15 = SKP_SMLABB( res_Q15, buf_ptr[ 3 ], SKP_Silk_resampler_frac_FIR_144[ 143 - table_index ][ 2 ] );
+ res_Q15 = SKP_SMLABB( res_Q15, buf_ptr[ 4 ], SKP_Silk_resampler_frac_FIR_144[ 143 - table_index ][ 1 ] );
+ res_Q15 = SKP_SMLABB( res_Q15, buf_ptr[ 5 ], SKP_Silk_resampler_frac_FIR_144[ 143 - table_index ][ 0 ] );
+ *out++ = (SKP_int16)SKP_SAT16( SKP_RSHIFT_ROUND( res_Q15, 15 ) );
+ }
+ return out;
+}
+/* Upsample using a combination of allpass-based 2x upsampling and FIR interpolation */
+void SKP_Silk_resampler_private_IIR_FIR(
+ void *SS, /* I/O: Resampler state */
+ SKP_int16 out[], /* O: Output signal */
+ const SKP_int16 in[], /* I: Input signal */
+ SKP_int32 inLen /* I: Number of input samples */
+)
+{
+ SKP_Silk_resampler_state_struct *S = (SKP_Silk_resampler_state_struct *)SS;
+ SKP_int32 nSamplesIn;
+ SKP_int32 max_index_Q16, index_increment_Q16;
+ SKP_int16 buf[ 2 * RESAMPLER_MAX_BATCH_SIZE_IN + RESAMPLER_ORDER_FIR_144 ];
+
+
+ /* Copy buffered samples to start of buffer */
+ SKP_memcpy( buf, S->sFIR, RESAMPLER_ORDER_FIR_144 * sizeof( SKP_int32 ) );
+
+ /* Iterate over blocks of frameSizeIn input samples */
+ index_increment_Q16 = S->invRatio_Q16;
+ while( 1 ) {
+ nSamplesIn = SKP_min( inLen, S->batchSize );
+
+ if( S->input2x == 1 ) {
+ /* Upsample 2x */
+ S->up2_function( S->sIIR, &buf[ RESAMPLER_ORDER_FIR_144 ], in, nSamplesIn );
+ } else {
+ /* Fourth-order ARMA filter */
+ SKP_Silk_resampler_private_ARMA4( S->sIIR, &buf[ RESAMPLER_ORDER_FIR_144 ], in, S->Coefs, nSamplesIn );
+ }
+
+ max_index_Q16 = SKP_LSHIFT32( nSamplesIn, 16 + S->input2x ); /* +1 if 2x upsampling */
+ out = SKP_Silk_resampler_private_IIR_FIR_INTERPOL(out, buf, max_index_Q16, index_increment_Q16);
+ in += nSamplesIn;
+ inLen -= nSamplesIn;
+
+ if( inLen > 0 ) {
+ /* More iterations to do; copy last part of filtered signal to beginning of buffer */
+ SKP_memcpy( buf, &buf[ nSamplesIn << S->input2x ], RESAMPLER_ORDER_FIR_144 * sizeof( SKP_int32 ) );
+ } else {
+ break;
+ }
+ }
+
+ /* Copy last part of filtered signal to the state for the next call */
+ SKP_memcpy( S->sFIR, &buf[nSamplesIn << S->input2x ], RESAMPLER_ORDER_FIR_144 * sizeof( SKP_int32 ) );
+}
+
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_resampler_private_copy.c
@@ -1,0 +1,49 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * File Name: SKP_Silk_resampler_private_copy.c *
+ * *
+ * Description: Copy. *
+ * *
+ * Copyright 2010 (c), Skype Limited *
+ * All rights reserved. *
+ * */
+
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_resampler_private.h"
+
+/* Copy */
+void SKP_Silk_resampler_private_copy(
+ void *SS, /* I/O: Resampler state (unused) */
+ SKP_int16 out[], /* O: Output signal */
+ const SKP_int16 in[], /* I: Input signal */
+ SKP_int32 inLen /* I: Number of input samples */
+)
+{
+ SKP_memcpy( out, in, inLen * sizeof( SKP_int16 ) );
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_resampler_private_down4.c
@@ -1,0 +1,77 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_resampler_private_down4.c *
+ * *
+ * Downsample by a factor 4 *
+ * *
+ * Copyright 2010 (c), Skype Limited *
+ * */
+
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_resampler_private.h"
+
+/* Downsample by a factor 4. Note: very low quality, only use with input sampling rates above 96 kHz. */
+void SKP_Silk_resampler_private_down4(
+ SKP_int32 *S, /* I/O: State vector [ 2 ] */
+ SKP_int16 *out, /* O: Output signal [ floor(len/2) ] */
+ const SKP_int16 *in, /* I: Input signal [ len ] */
+ SKP_int32 inLen /* I: Number of input samples */
+)
+{
+ SKP_int32 k, len4 = SKP_RSHIFT32( inLen, 2 );
+ SKP_int32 in32, out32, Y, X;
+
+ SKP_assert( SKP_Silk_resampler_down2_0 > 0 );
+ SKP_assert( SKP_Silk_resampler_down2_1 < 0 );
+
+ /* Internal variables and state are in Q10 format */
+ for( k = 0; k < len4; k++ ) {
+ /* Add two input samples and convert to Q10 */
+ in32 = SKP_LSHIFT( SKP_ADD32( (SKP_int32)in[ 4 * k ], (SKP_int32)in[ 4 * k + 1 ] ), 9 );
+
+ /* All-pass section for even input sample */
+ Y = SKP_SUB32( in32, S[ 0 ] );
+ X = SKP_SMLAWB( Y, Y, SKP_Silk_resampler_down2_1 );
+ out32 = SKP_ADD32( S[ 0 ], X );
+ S[ 0 ] = SKP_ADD32( in32, X );
+
+ /* Add two input samples and convert to Q10 */
+ in32 = SKP_LSHIFT( SKP_ADD32( (SKP_int32)in[ 4 * k + 2 ], (SKP_int32)in[ 4 * k + 3 ] ), 9 );
+
+ /* All-pass section for odd input sample */
+ Y = SKP_SUB32( in32, S[ 1 ] );
+ X = SKP_SMULWB( Y, SKP_Silk_resampler_down2_0 );
+ out32 = SKP_ADD32( out32, S[ 1 ] );
+ out32 = SKP_ADD32( out32, X );
+ S[ 1 ] = SKP_ADD32( in32, X );
+
+ /* Add, convert back to int16 and store to output */
+ out[ k ] = (SKP_int16)SKP_SAT16( SKP_RSHIFT_ROUND( out32, 11 ) );
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_resampler_private_down_FIR.c
@@ -1,0 +1,166 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * File Name: SKP_Silk_resampler_private_down_FIR.c *
+ * *
+ * Description: Hybrid IIR/FIR polyphase implementation of resampling *
+ * *
+ * Copyright 2010 (c), Skype Limited *
+ * All rights reserved. *
+ * */
+
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_resampler_private.h"
+SKP_INLINE SKP_int16 *SKP_Silk_resampler_private_down_FIR_INTERPOL0(
+ SKP_int16 *out, SKP_int32 *buf2, const SKP_int16 *FIR_Coefs, SKP_int32 max_index_Q16, SKP_int32 index_increment_Q16){
+
+ SKP_int32 index_Q16, res_Q6;
+ SKP_int32 *buf_ptr;
+ for( index_Q16 = 0; index_Q16 < max_index_Q16; index_Q16 += index_increment_Q16 ) {
+ /* Integer part gives pointer to buffered input */
+ buf_ptr = buf2 + SKP_RSHIFT( index_Q16, 16 );
+
+ /* Inner product */
+ res_Q6 = SKP_SMULWB( SKP_ADD32( buf_ptr[ 0 ], buf_ptr[ 15 ] ), FIR_Coefs[ 0 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, SKP_ADD32( buf_ptr[ 1 ], buf_ptr[ 14 ] ), FIR_Coefs[ 1 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, SKP_ADD32( buf_ptr[ 2 ], buf_ptr[ 13 ] ), FIR_Coefs[ 2 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, SKP_ADD32( buf_ptr[ 3 ], buf_ptr[ 12 ] ), FIR_Coefs[ 3 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, SKP_ADD32( buf_ptr[ 4 ], buf_ptr[ 11 ] ), FIR_Coefs[ 4 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, SKP_ADD32( buf_ptr[ 5 ], buf_ptr[ 10 ] ), FIR_Coefs[ 5 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, SKP_ADD32( buf_ptr[ 6 ], buf_ptr[ 9 ] ), FIR_Coefs[ 6 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, SKP_ADD32( buf_ptr[ 7 ], buf_ptr[ 8 ] ), FIR_Coefs[ 7 ] );
+
+ /* Scale down, saturate and store in output array */
+ *out++ = (SKP_int16)SKP_SAT16( SKP_RSHIFT_ROUND( res_Q6, 6 ) );
+ }
+ return out;
+}
+
+SKP_INLINE SKP_int16 *SKP_Silk_resampler_private_down_FIR_INTERPOL1(
+ SKP_int16 *out, SKP_int32 *buf2, const SKP_int16 *FIR_Coefs, SKP_int32 max_index_Q16, SKP_int32 index_increment_Q16, SKP_int32 FIR_Fracs){
+
+ SKP_int32 index_Q16, res_Q6;
+ SKP_int32 *buf_ptr;
+ SKP_int32 interpol_ind;
+ const SKP_int16 *interpol_ptr;
+ for( index_Q16 = 0; index_Q16 < max_index_Q16; index_Q16 += index_increment_Q16 ) {
+ /* Integer part gives pointer to buffered input */
+ buf_ptr = buf2 + SKP_RSHIFT( index_Q16, 16 );
+
+ /* Fractional part gives interpolation coefficients */
+ interpol_ind = SKP_SMULWB( index_Q16 & 0xFFFF, FIR_Fracs );
+
+ /* Inner product */
+ interpol_ptr = &FIR_Coefs[ RESAMPLER_DOWN_ORDER_FIR / 2 * interpol_ind ];
+ res_Q6 = SKP_SMULWB( buf_ptr[ 0 ], interpol_ptr[ 0 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 1 ], interpol_ptr[ 1 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 2 ], interpol_ptr[ 2 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 3 ], interpol_ptr[ 3 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 4 ], interpol_ptr[ 4 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 5 ], interpol_ptr[ 5 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 6 ], interpol_ptr[ 6 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 7 ], interpol_ptr[ 7 ] );
+ interpol_ptr = &FIR_Coefs[ RESAMPLER_DOWN_ORDER_FIR / 2 * ( FIR_Fracs - 1 - interpol_ind ) ];
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 15 ], interpol_ptr[ 0 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 14 ], interpol_ptr[ 1 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 13 ], interpol_ptr[ 2 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 12 ], interpol_ptr[ 3 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 11 ], interpol_ptr[ 4 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 10 ], interpol_ptr[ 5 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 9 ], interpol_ptr[ 6 ] );
+ res_Q6 = SKP_SMLAWB( res_Q6, buf_ptr[ 8 ], interpol_ptr[ 7 ] );
+
+ /* Scale down, saturate and store in output array */
+ *out++ = (SKP_int16)SKP_SAT16( SKP_RSHIFT_ROUND( res_Q6, 6 ) );
+ }
+ return out;
+}
+
+
+/* Resample with a 2x downsampler (optional), a 2nd order AR filter followed by FIR interpolation */
+void SKP_Silk_resampler_private_down_FIR(
+ void *SS, /* I/O: Resampler state */
+ SKP_int16 out[], /* O: Output signal */
+ const SKP_int16 in[], /* I: Input signal */
+ SKP_int32 inLen /* I: Number of input samples */
+)
+{
+ SKP_Silk_resampler_state_struct *S = (SKP_Silk_resampler_state_struct *)SS;
+ SKP_int32 nSamplesIn;
+ SKP_int32 max_index_Q16, index_increment_Q16;
+ SKP_int16 buf1[ RESAMPLER_MAX_BATCH_SIZE_IN / 2 ];
+ SKP_int32 buf2[ RESAMPLER_MAX_BATCH_SIZE_IN + RESAMPLER_DOWN_ORDER_FIR ];
+ const SKP_int16 *FIR_Coefs;
+
+ /* Copy buffered samples to start of buffer */
+ SKP_memcpy( buf2, S->sFIR, RESAMPLER_DOWN_ORDER_FIR * sizeof( SKP_int32 ) );
+
+ FIR_Coefs = &S->Coefs[ 2 ];
+
+ /* Iterate over blocks of frameSizeIn input samples */
+ index_increment_Q16 = S->invRatio_Q16;
+ while( 1 ) {
+ nSamplesIn = SKP_min( inLen, S->batchSize );
+
+ if( S->input2x == 1 ) {
+ /* Downsample 2x */
+ SKP_Silk_resampler_down2( S->sDown2, buf1, in, nSamplesIn );
+
+ nSamplesIn = SKP_RSHIFT32( nSamplesIn, 1 );
+
+ /* Second-order AR filter (output in Q8) */
+ SKP_Silk_resampler_private_AR2( S->sIIR, &buf2[ RESAMPLER_DOWN_ORDER_FIR ], buf1, S->Coefs, nSamplesIn );
+ } else {
+ /* Second-order AR filter (output in Q8) */
+ SKP_Silk_resampler_private_AR2( S->sIIR, &buf2[ RESAMPLER_DOWN_ORDER_FIR ], in, S->Coefs, nSamplesIn );
+ }
+
+ max_index_Q16 = SKP_LSHIFT32( nSamplesIn, 16 );
+
+ /* Interpolate filtered signal */
+ if( S->FIR_Fracs == 1 ) {
+ out = SKP_Silk_resampler_private_down_FIR_INTERPOL0(out, buf2, FIR_Coefs, max_index_Q16, index_increment_Q16);
+ } else {
+ out = SKP_Silk_resampler_private_down_FIR_INTERPOL1(out, buf2, FIR_Coefs, max_index_Q16, index_increment_Q16, S->FIR_Fracs);
+ }
+
+ in += nSamplesIn << S->input2x;
+ inLen -= nSamplesIn << S->input2x;
+
+ if( inLen > S->input2x ) {
+ /* More iterations to do; copy last part of filtered signal to beginning of buffer */
+ SKP_memcpy( buf2, &buf2[ nSamplesIn ], RESAMPLER_DOWN_ORDER_FIR * sizeof( SKP_int32 ) );
+ } else {
+ break;
+ }
+ }
+
+ /* Copy last part of filtered signal to the state for the next call */
+ SKP_memcpy( S->sFIR, &buf2[ nSamplesIn ], RESAMPLER_DOWN_ORDER_FIR * sizeof( SKP_int32 ) );
+}
+
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_resampler_private_up2_HQ.c
@@ -1,0 +1,109 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_resampler_private.h"
+
+/* Upsample by a factor 2, high quality */
+/* Uses 2nd order allpass filters for the 2x upsampling, followed by a */
+/* notch filter just above Nyquist. */
+void SKP_Silk_resampler_private_up2_HQ(
+ SKP_int32 *S, /* I/O: Resampler state [ 6 ] */
+ SKP_int16 *out, /* O: Output signal [ 2 * len ] */
+ const SKP_int16 *in, /* I: Input signal [ len ] */
+ SKP_int32 len /* I: Number of INPUT samples */
+)
+{
+ SKP_int32 k;
+ SKP_int32 in32, out32_1, out32_2, Y, X;
+
+ SKP_assert( SKP_Silk_resampler_up2_hq_0[ 0 ] > 0 );
+ SKP_assert( SKP_Silk_resampler_up2_hq_0[ 1 ] < 0 );
+ SKP_assert( SKP_Silk_resampler_up2_hq_1[ 0 ] > 0 );
+ SKP_assert( SKP_Silk_resampler_up2_hq_1[ 1 ] < 0 );
+
+ /* Internal variables and state are in Q10 format */
+ for( k = 0; k < len; k++ ) {
+ /* Convert to Q10 */
+ in32 = SKP_LSHIFT( (SKP_int32)in[ k ], 10 );
+
+ /* First all-pass section for even output sample */
+ Y = SKP_SUB32( in32, S[ 0 ] );
+ X = SKP_SMULWB( Y, SKP_Silk_resampler_up2_hq_0[ 0 ] );
+ out32_1 = SKP_ADD32( S[ 0 ], X );
+ S[ 0 ] = SKP_ADD32( in32, X );
+
+ /* Second all-pass section for even output sample */
+ Y = SKP_SUB32( out32_1, S[ 1 ] );
+ X = SKP_SMLAWB( Y, Y, SKP_Silk_resampler_up2_hq_0[ 1 ] );
+ out32_2 = SKP_ADD32( S[ 1 ], X );
+ S[ 1 ] = SKP_ADD32( out32_1, X );
+
+ /* Biquad notch filter */
+ out32_2 = SKP_SMLAWB( out32_2, S[ 5 ], SKP_Silk_resampler_up2_hq_notch[ 2 ] );
+ out32_2 = SKP_SMLAWB( out32_2, S[ 4 ], SKP_Silk_resampler_up2_hq_notch[ 1 ] );
+ out32_1 = SKP_SMLAWB( out32_2, S[ 4 ], SKP_Silk_resampler_up2_hq_notch[ 0 ] );
+ S[ 5 ] = SKP_SUB32( out32_2, S[ 5 ] );
+
+ /* Apply gain in Q15, convert back to int16 and store to output */
+ out[ 2 * k ] = (SKP_int16)SKP_SAT16( SKP_RSHIFT32(
+ SKP_SMLAWB( 256, out32_1, SKP_Silk_resampler_up2_hq_notch[ 3 ] ), 9 ) );
+
+ /* First all-pass section for odd output sample */
+ Y = SKP_SUB32( in32, S[ 2 ] );
+ X = SKP_SMULWB( Y, SKP_Silk_resampler_up2_hq_1[ 0 ] );
+ out32_1 = SKP_ADD32( S[ 2 ], X );
+ S[ 2 ] = SKP_ADD32( in32, X );
+
+ /* Second all-pass section for odd output sample */
+ Y = SKP_SUB32( out32_1, S[ 3 ] );
+ X = SKP_SMLAWB( Y, Y, SKP_Silk_resampler_up2_hq_1[ 1 ] );
+ out32_2 = SKP_ADD32( S[ 3 ], X );
+ S[ 3 ] = SKP_ADD32( out32_1, X );
+
+ /* Biquad notch filter */
+ out32_2 = SKP_SMLAWB( out32_2, S[ 4 ], SKP_Silk_resampler_up2_hq_notch[ 2 ] );
+ out32_2 = SKP_SMLAWB( out32_2, S[ 5 ], SKP_Silk_resampler_up2_hq_notch[ 1 ] );
+ out32_1 = SKP_SMLAWB( out32_2, S[ 5 ], SKP_Silk_resampler_up2_hq_notch[ 0 ] );
+ S[ 4 ] = SKP_SUB32( out32_2, S[ 4 ] );
+
+ /* Apply gain in Q15, convert back to int16 and store to output */
+ out[ 2 * k + 1 ] = (SKP_int16)SKP_SAT16( SKP_RSHIFT32(
+ SKP_SMLAWB( 256, out32_1, SKP_Silk_resampler_up2_hq_notch[ 3 ] ), 9 ) );
+ }
+}
+
+void SKP_Silk_resampler_private_up2_HQ_wrapper(
+ void *SS, /* I/O: Resampler state (unused) */
+ SKP_int16 *out, /* O: Output signal [ 2 * len ] */
+ const SKP_int16 *in, /* I: Input signal [ len ] */
+ SKP_int32 len /* I: Number of input samples */
+)
+{
+ SKP_Silk_resampler_state_struct *S = (SKP_Silk_resampler_state_struct *)SS;
+ SKP_Silk_resampler_private_up2_HQ( S->sIIR, out, in, len );
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_resampler_private_up4.c
@@ -1,0 +1,73 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_resampler_private.h"
+
+/* Upsample by a factor 4, Note: low quality, only use with output sampling rates above 96 kHz. */
+void SKP_Silk_resampler_private_up4(
+ SKP_int32 *S, /* I/O: State vector [ 2 ] */
+ SKP_int16 *out, /* O: Output signal [ 4 * len ] */
+ const SKP_int16 *in, /* I: Input signal [ len ] */
+ SKP_int32 len /* I: Number of INPUT samples */
+)
+{
+ SKP_int32 k;
+ SKP_int32 in32, out32, Y, X;
+ SKP_int16 out16;
+
+ SKP_assert( SKP_Silk_resampler_up2_lq_0 > 0 );
+ SKP_assert( SKP_Silk_resampler_up2_lq_1 < 0 );
+
+ /* Internal variables and state are in Q10 format */
+ for( k = 0; k < len; k++ ) {
+ /* Convert to Q10 */
+ in32 = SKP_LSHIFT( (SKP_int32)in[ k ], 10 );
+
+ /* All-pass section for even output sample */
+ Y = SKP_SUB32( in32, S[ 0 ] );
+ X = SKP_SMULWB( Y, SKP_Silk_resampler_up2_lq_0 );
+ out32 = SKP_ADD32( S[ 0 ], X );
+ S[ 0 ] = SKP_ADD32( in32, X );
+
+ /* Convert back to int16 and store to output */
+ out16 = (SKP_int16)SKP_SAT16( SKP_RSHIFT_ROUND( out32, 10 ) );
+ out[ 4 * k ] = out16;
+ out[ 4 * k + 1 ] = out16;
+
+ /* All-pass section for odd output sample */
+ Y = SKP_SUB32( in32, S[ 1 ] );
+ X = SKP_SMLAWB( Y, Y, SKP_Silk_resampler_up2_lq_1 );
+ out32 = SKP_ADD32( S[ 1 ], X );
+ S[ 1 ] = SKP_ADD32( in32, X );
+
+ /* Convert back to int16 and store to output */
+ out16 = (SKP_int16)SKP_SAT16( SKP_RSHIFT_ROUND( out32, 10 ) );
+ out[ 4 * k + 2 ] = out16;
+ out[ 4 * k + 3 ] = out16;
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_resampler_rom.c
@@ -1,0 +1,269 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * File Name: SKP_Silk_resampler_rom.c *
+ * *
+ * Description: Filter coefficients for IIR/FIR polyphase resampling *
+ * Total size: <600 Words (1.2 kB) *
+ * *
+ * Copyright 2010 (c), Skype Limited *
+ * All rights reserved. *
+ * */
+
+#include "SKP_Silk_resampler_private.h"
+
+/* Tables for 2x downsampler */
+const SKP_int16 SKP_Silk_resampler_down2_0 = 9872;
+const SKP_int16 SKP_Silk_resampler_down2_1 = 39809 - 65536;
+
+/* Tables for 2x upsampler, low quality */
+const SKP_int16 SKP_Silk_resampler_up2_lq_0 = 8102;
+const SKP_int16 SKP_Silk_resampler_up2_lq_1 = 36783 - 65536;
+
+/* Tables for 2x upsampler, high quality */
+const SKP_int16 SKP_Silk_resampler_up2_hq_0[ 2 ] = { 4280, 33727 - 65536 };
+const SKP_int16 SKP_Silk_resampler_up2_hq_1[ 2 ] = { 16295, 54015 - 65536 };
+/* Matlab code for the notch filter coefficients: */
+/* B = [1, 0.14, 1]; A = [1, 0.08, 0.84]; G = 0.89; freqz(G * B, A, 2^14, 16e3); axis([0, 8000, -10, 1]); */
+/* fprintf('\t%6d, %6d, %6d, %6d\n', round(B(2)*2^16), round(-A(2)*2^16), round((1-A(3))*2^16), round(G*2^15)) */
+const SKP_int16 SKP_Silk_resampler_up2_hq_notch[ 4 ] = { 9175, -5243, 10486, 29164 };
+//const SKP_int16 SKP_Silk_resampler_up2_hq_notch[ 4 ] = { 6554, -3932, 6554, 30573 }; /* for hybrid mode? */
+
+/* Tables with IIR and FIR coefficients for fractional downsamplers (90 Words) */
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_3_4_COEFS[ 2 + 3 * RESAMPLER_DOWN_ORDER_FIR / 2 ] = {
+ -20253, -13986,
+ 86, 7, -151, 368, -542, 232, 11041, 21904,
+ 39, 90, -181, 216, -17, -877, 6408, 19695,
+ 2, 113, -108, 2, 314, -977, 2665, 15787,
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_2_3_COEFS[ 2 + 2 * RESAMPLER_DOWN_ORDER_FIR / 2 ] = {
+ -13997, -14120,
+ 60, -174, 71, 298, -800, 659, 9238, 17461,
+ 48, -40, -150, 314, -155, -845, 4188, 14293,
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_1_2_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR / 2 ] = {
+ 1233, -14293,
+ -91, 162, 169, -342, -505, 1332, 5281, 8742,
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_3_8_COEFS[ 2 + 3 * RESAMPLER_DOWN_ORDER_FIR / 2 ] = {
+ 12634, -14550,
+ 246, -175, -326, -113, 764, 2209, 3664, 4402,
+ 171, 3, -301, -258, 391, 1693, 3227, 4272,
+ 88, 138, -236, -327, 95, 1203, 2733, 4022,
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_1_3_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR / 2 ] = {
+ 16306, -14409,
+ 99, -201, -220, -16, 572, 1483, 2433, 3043,
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_2_3_COEFS_LQ[ 2 + 2 * 2 ] = {
+ -2797, -6507,
+ 4697, 10739,
+ 1567, 8276,
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_1_3_COEFS_LQ[ 2 + 3 ] = {
+ 16777, -9792,
+ 890, 1614, 2148,
+};
+
+
+/* Tables with coefficients for 4th order ARMA filter (35 Words), in a packed format: */
+/* { B1_Q14[1], B2_Q14[1], -A1_Q14[1], -A1_Q14[2], -A2_Q14[1], -A2_Q14[2], gain_Q16 } */
+/* where it is assumed that B*_Q14[0], B*_Q14[2], A*_Q14[0] are all 16384 */
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_320_441_ARMA4_COEFS[ 7 ] = {
+ 31454, 24746, -9706, -3386, -17911, -13243, 24797
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_240_441_ARMA4_COEFS[ 7 ] = {
+ 28721, 11254, 3189, -2546, -1495, -12618, 11562
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_160_441_ARMA4_COEFS[ 7 ] = {
+ 23492, -6457, 14358, -4856, 14654, -13008, 4456
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_120_441_ARMA4_COEFS[ 7 ] = {
+ 19311, -15569, 19489, -6950, 21441, -13559, 2370
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_80_441_ARMA4_COEFS[ 7 ] = {
+ 13248, -23849, 24126, -9486, 26806, -14286, 1065
+};
+
+/* Table with interplation fractions of 1/288 : 2/288 : 287/288 (432 Words) */
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_resampler_frac_FIR_144[ 144 ][ RESAMPLER_ORDER_FIR_144 / 2 ] = {
+ { -25, 58, 32526},
+ { -8, -69, 32461},
+ { 8, -195, 32393},
+ { 25, -318, 32321},
+ { 41, -439, 32244},
+ { 57, -557, 32163},
+ { 72, -673, 32079},
+ { 88, -787, 31990},
+ { 103, -899, 31897},
+ { 118, -1009, 31801},
+ { 133, -1116, 31700},
+ { 148, -1221, 31596},
+ { 162, -1324, 31488},
+ { 177, -1424, 31376},
+ { 191, -1522, 31260},
+ { 205, -1618, 31140},
+ { 218, -1712, 31017},
+ { 231, -1803, 30890},
+ { 245, -1893, 30759},
+ { 257, -1980, 30625},
+ { 270, -2065, 30487},
+ { 282, -2147, 30346},
+ { 295, -2228, 30201},
+ { 306, -2306, 30052},
+ { 318, -2382, 29900},
+ { 330, -2456, 29745},
+ { 341, -2528, 29586},
+ { 352, -2597, 29424},
+ { 362, -2664, 29259},
+ { 373, -2730, 29090},
+ { 383, -2793, 28918},
+ { 393, -2854, 28743},
+ { 402, -2912, 28565},
+ { 411, -2969, 28384},
+ { 421, -3024, 28199},
+ { 429, -3076, 28012},
+ { 438, -3126, 27822},
+ { 446, -3175, 27628},
+ { 454, -3221, 27432},
+ { 462, -3265, 27233},
+ { 469, -3307, 27031},
+ { 476, -3348, 26826},
+ { 483, -3386, 26619},
+ { 490, -3422, 26409},
+ { 496, -3456, 26196},
+ { 502, -3488, 25981},
+ { 508, -3518, 25763},
+ { 514, -3547, 25543},
+ { 519, -3573, 25320},
+ { 524, -3597, 25095},
+ { 529, -3620, 24867},
+ { 533, -3640, 24637},
+ { 538, -3659, 24405},
+ { 541, -3676, 24171},
+ { 545, -3691, 23934},
+ { 548, -3704, 23696},
+ { 552, -3716, 23455},
+ { 554, -3726, 23212},
+ { 557, -3733, 22967},
+ { 559, -3740, 22721},
+ { 561, -3744, 22472},
+ { 563, -3747, 22222},
+ { 565, -3748, 21970},
+ { 566, -3747, 21716},
+ { 567, -3745, 21460},
+ { 568, -3741, 21203},
+ { 568, -3735, 20944},
+ { 568, -3728, 20684},
+ { 568, -3719, 20422},
+ { 568, -3708, 20159},
+ { 568, -3697, 19894},
+ { 567, -3683, 19628},
+ { 566, -3668, 19361},
+ { 564, -3652, 19093},
+ { 563, -3634, 18823},
+ { 561, -3614, 18552},
+ { 559, -3594, 18280},
+ { 557, -3571, 18008},
+ { 554, -3548, 17734},
+ { 552, -3523, 17459},
+ { 549, -3497, 17183},
+ { 546, -3469, 16907},
+ { 542, -3440, 16630},
+ { 539, -3410, 16352},
+ { 535, -3379, 16074},
+ { 531, -3346, 15794},
+ { 527, -3312, 15515},
+ { 522, -3277, 15235},
+ { 517, -3241, 14954},
+ { 513, -3203, 14673},
+ { 507, -3165, 14392},
+ { 502, -3125, 14110},
+ { 497, -3085, 13828},
+ { 491, -3043, 13546},
+ { 485, -3000, 13264},
+ { 479, -2957, 12982},
+ { 473, -2912, 12699},
+ { 466, -2867, 12417},
+ { 460, -2820, 12135},
+ { 453, -2772, 11853},
+ { 446, -2724, 11571},
+ { 439, -2675, 11289},
+ { 432, -2625, 11008},
+ { 424, -2574, 10727},
+ { 417, -2522, 10446},
+ { 409, -2470, 10166},
+ { 401, -2417, 9886},
+ { 393, -2363, 9607},
+ { 385, -2309, 9328},
+ { 376, -2253, 9050},
+ { 368, -2198, 8773},
+ { 359, -2141, 8497},
+ { 351, -2084, 8221},
+ { 342, -2026, 7946},
+ { 333, -1968, 7672},
+ { 324, -1910, 7399},
+ { 315, -1850, 7127},
+ { 305, -1791, 6856},
+ { 296, -1731, 6586},
+ { 286, -1670, 6317},
+ { 277, -1609, 6049},
+ { 267, -1548, 5783},
+ { 257, -1486, 5517},
+ { 247, -1424, 5254},
+ { 237, -1362, 4991},
+ { 227, -1300, 4730},
+ { 217, -1237, 4470},
+ { 207, -1174, 4212},
+ { 197, -1110, 3956},
+ { 187, -1047, 3701},
+ { 176, -984, 3448},
+ { 166, -920, 3196},
+ { 155, -856, 2946},
+ { 145, -792, 2698},
+ { 134, -728, 2452},
+ { 124, -664, 2207},
+ { 113, -600, 1965},
+ { 102, -536, 1724},
+ { 92, -472, 1486},
+ { 81, -408, 1249},
+ { 70, -345, 1015},
+ { 60, -281, 783},
+ { 49, -217, 553},
+ { 38, -154, 325},
+};
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_resampler_rom.h
@@ -1,0 +1,79 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef _SKP_SILK_FIX_RESAMPLER_ROM_H_
+#define _SKP_SILK_FIX_RESAMPLER_ROM_H_
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include "SKP_Silk_typedef.h"
+#include "SKP_Silk_resampler_structs.h"
+
+#define RESAMPLER_DOWN_ORDER_FIR 16
+#define RESAMPLER_ORDER_FIR_144 6
+
+
+/* Tables for 2x downsampler. Values above 32767 intentionally wrap to a negative value. */
+extern const SKP_int16 SKP_Silk_resampler_down2_0;
+extern const SKP_int16 SKP_Silk_resampler_down2_1;
+
+/* Tables for 2x upsampler, low quality. Values above 32767 intentionally wrap to a negative value. */
+extern const SKP_int16 SKP_Silk_resampler_up2_lq_0;
+extern const SKP_int16 SKP_Silk_resampler_up2_lq_1;
+
+/* Tables for 2x upsampler, high quality. Values above 32767 intentionally wrap to a negative value. */
+extern const SKP_int16 SKP_Silk_resampler_up2_hq_0[ 2 ];
+extern const SKP_int16 SKP_Silk_resampler_up2_hq_1[ 2 ];
+extern const SKP_int16 SKP_Silk_resampler_up2_hq_notch[ 4 ];
+
+/* Tables with IIR and FIR coefficients for fractional downsamplers */
+extern const SKP_int16 SKP_Silk_Resampler_3_4_COEFS[ 2 + 3 * RESAMPLER_DOWN_ORDER_FIR / 2 ];
+extern const SKP_int16 SKP_Silk_Resampler_2_3_COEFS[ 2 + 2 * RESAMPLER_DOWN_ORDER_FIR / 2 ];
+extern const SKP_int16 SKP_Silk_Resampler_1_2_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR / 2 ];
+extern const SKP_int16 SKP_Silk_Resampler_3_8_COEFS[ 2 + 3 * RESAMPLER_DOWN_ORDER_FIR / 2 ];
+extern const SKP_int16 SKP_Silk_Resampler_1_3_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR / 2 ];
+extern const SKP_int16 SKP_Silk_Resampler_2_3_COEFS_LQ[ 2 + 2 * 2 ];
+extern const SKP_int16 SKP_Silk_Resampler_1_3_COEFS_LQ[ 2 + 3 ];
+
+/* Tables with coefficients for 4th order ARMA filter */
+extern const SKP_int16 SKP_Silk_Resampler_320_441_ARMA4_COEFS[ 7 ];
+extern const SKP_int16 SKP_Silk_Resampler_240_441_ARMA4_COEFS[ 7 ];
+extern const SKP_int16 SKP_Silk_Resampler_160_441_ARMA4_COEFS[ 7 ];
+extern const SKP_int16 SKP_Silk_Resampler_120_441_ARMA4_COEFS[ 7 ];
+extern const SKP_int16 SKP_Silk_Resampler_80_441_ARMA4_COEFS[ 7 ];
+
+/* Table with interplation fractions of 1/288 : 2/288 : 287/288 (432 Words) */
+extern const SKP_int16 SKP_Silk_resampler_frac_FIR_144[ 144 ][ RESAMPLER_ORDER_FIR_144 / 2 ];
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _SKP_SILK_FIX_RESAMPLER_ROM_H_
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_resampler_structs.h
@@ -1,0 +1,80 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * File Name: SKP_Silk_resampler_structs.h *
+ * *
+ * Description: Structs for IIR/FIR resamplers *
+ * *
+ * Copyright 2010 (c), Skype Limited *
+ * All rights reserved. *
+ * *
+ * */
+
+#ifndef SKP_Silk_RESAMPLER_STRUCTS_H
+#define SKP_Silk_RESAMPLER_STRUCTS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Flag to enable support for input/output sampling rates above 48 kHz. Turn off for embedded devices */
+#define RESAMPLER_SUPPORT_ABOVE_48KHZ 1
+
+#define SKP_Silk_RESAMPLER_MAX_FIR_ORDER 16
+#define SKP_Silk_RESAMPLER_MAX_IIR_ORDER 6
+
+
+typedef struct _SKP_Silk_resampler_state_struct{
+ SKP_int32 sIIR[ SKP_Silk_RESAMPLER_MAX_IIR_ORDER ]; /* this must be the first element of this struct */
+ SKP_int32 sFIR[ SKP_Silk_RESAMPLER_MAX_FIR_ORDER ];
+ SKP_int32 sDown2[ 2 ];
+ void (*resampler_function)( void *, SKP_int16 *, const SKP_int16 *, SKP_int32 );
+ void (*up2_function)( SKP_int32 *, SKP_int16 *, const SKP_int16 *, SKP_int32 );
+ SKP_int32 batchSize;
+ SKP_int32 invRatio_Q16;
+ SKP_int32 FIR_Fracs;
+ SKP_int32 input2x;
+ const SKP_int16 *Coefs;
+#if RESAMPLER_SUPPORT_ABOVE_48KHZ
+ SKP_int32 sDownPre[ 2 ];
+ SKP_int32 sUpPost[ 2 ];
+ void (*down_pre_function)( SKP_int32 *, SKP_int16 *, const SKP_int16 *, SKP_int32 );
+ void (*up_post_function)( SKP_int32 *, SKP_int16 *, const SKP_int16 *, SKP_int32 );
+ SKP_int32 batchSizePrePost;
+ SKP_int32 ratio_Q16;
+ SKP_int32 nPreDownsamplers;
+ SKP_int32 nPostUpsamplers;
+#endif
+ SKP_int32 magic_number;
+} SKP_Silk_resampler_state_struct;
+
+#ifdef __cplusplus
+}
+#endif
+#endif // SKP_Silk_RESAMPLER_STRUCTS_H
+
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_resampler_up2.c
@@ -1,0 +1,75 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_resampler_up2.c *
+ * *
+ * Upsample by a factor 2, low quality *
+ * *
+ * Copyright 2010 (c), Skype Limited *
+ * */
+
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_resampler_rom.h"
+
+/* Upsample by a factor 2, low quality */
+void SKP_Silk_resampler_up2(
+ SKP_int32 *S, /* I/O: State vector [ 2 ] */
+ SKP_int16 *out, /* O: Output signal [ 2 * len ] */
+ const SKP_int16 *in, /* I: Input signal [ len ] */
+ SKP_int32 len /* I: Number of input samples */
+)
+{
+ SKP_int32 k;
+ SKP_int32 in32, out32, Y, X;
+
+ SKP_assert( SKP_Silk_resampler_up2_lq_0 > 0 );
+ SKP_assert( SKP_Silk_resampler_up2_lq_1 < 0 );
+ /* Internal variables and state are in Q10 format */
+ for( k = 0; k < len; k++ ) {
+ /* Convert to Q10 */
+ in32 = SKP_LSHIFT( (SKP_int32)in[ k ], 10 );
+
+ /* All-pass section for even output sample */
+ Y = SKP_SUB32( in32, S[ 0 ] );
+ X = SKP_SMULWB( Y, SKP_Silk_resampler_up2_lq_0 );
+ out32 = SKP_ADD32( S[ 0 ], X );
+ S[ 0 ] = SKP_ADD32( in32, X );
+
+ /* Convert back to int16 and store to output */
+ out[ 2 * k ] = (SKP_int16)SKP_SAT16( SKP_RSHIFT_ROUND( out32, 10 ) );
+
+ /* All-pass section for odd output sample */
+ Y = SKP_SUB32( in32, S[ 1 ] );
+ X = SKP_SMLAWB( Y, Y, SKP_Silk_resampler_up2_lq_1 );
+ out32 = SKP_ADD32( S[ 1 ], X );
+ S[ 1 ] = SKP_ADD32( in32, X );
+
+ /* Convert back to int16 and store to output */
+ out[ 2 * k + 1 ] = (SKP_int16)SKP_SAT16( SKP_RSHIFT_ROUND( out32, 10 ) );
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_scale_copy_vector16.c
@@ -1,0 +1,45 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* Copy and multiply a vector by a constant */
+void SKP_Silk_scale_copy_vector16(
+ SKP_int16 *data_out,
+ const SKP_int16 *data_in,
+ SKP_int32 gain_Q16, /* (I): gain in Q16 */
+ const SKP_int dataSize /* (I): length */
+)
+{
+ SKP_int i;
+ SKP_int32 tmp32;
+
+ for( i = 0; i < dataSize; i++ ) {
+ tmp32 = SKP_SMULWB( gain_Q16, data_in[ i ] );
+ data_out[ i ] = (SKP_int16)SKP_CHECK_FIT16( tmp32 );
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_scale_vector.c
@@ -1,0 +1,42 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* Multiply a vector by a constant */
+void SKP_Silk_scale_vector32_Q26_lshift_18(
+ SKP_int32 *data1, /* (I/O): Q0/Q18 */
+ SKP_int32 gain_Q26, /* (I): Q26 */
+ SKP_int dataSize /* (I): length */
+)
+{
+ SKP_int i;
+
+ for( i = 0; i < dataSize; i++ ) {
+ data1[ i ] = (SKP_int32)SKP_CHECK_FIT32( SKP_RSHIFT64( SKP_SMULL( data1[ i ], gain_Q26 ), 8 ) );// OUTPUT: Q18
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_schur.c
@@ -1,0 +1,94 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_schur.c *
+ * *
+ * Calculates the reflection coefficients from the correlation sequence *
+ * *
+ * Copyright 2008 (c), Skype Limited *
+ * Date: 080103 *
+ * */
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* Faster than schur64(), but much less accurate. */
+/* uses SMLAWB(), requiring armv5E and higher. */
+SKP_int32 SKP_Silk_schur( /* O: Returns residual energy */
+ SKP_int16 *rc_Q15, /* O: reflection coefficients [order] Q15 */
+ const SKP_int32 *c, /* I: correlations [order+1] */
+ const SKP_int32 order /* I: prediction order */
+)
+{
+ SKP_int k, n, lz;
+ SKP_int32 C[ SKP_Silk_MAX_ORDER_LPC + 1 ][ 2 ];
+ SKP_int32 Ctmp1, Ctmp2, rc_tmp_Q15;
+
+ /* Get number of leading zeros */
+ lz = SKP_Silk_CLZ32( c[ 0 ] );
+
+ /* Copy correlations and adjust level to Q30 */
+ if( lz < 2 ) {
+ /* lz must be 1, so shift one to the right */
+ for( k = 0; k < order + 1; k++ ) {
+ C[ k ][ 0 ] = C[ k ][ 1 ] = SKP_RSHIFT( c[ k ], 1 );
+ }
+ } else if( lz > 2 ) {
+ /* Shift to the left */
+ lz -= 2;
+ for( k = 0; k < order + 1; k++ ) {
+ C[ k ][ 0 ] = C[ k ][ 1 ] = SKP_LSHIFT( c[ k ], lz );
+ }
+ } else {
+ /* No need to shift */
+ for( k = 0; k < order + 1; k++ ) {
+ C[ k ][ 0 ] = C[ k ][ 1 ] = c[ k ];
+ }
+ }
+
+ for( k = 0; k < order; k++ ) {
+
+ /* Get reflection coefficient */
+ rc_tmp_Q15 = -SKP_DIV32_16( C[ k + 1 ][ 0 ], SKP_max_32( SKP_RSHIFT( C[ 0 ][ 1 ], 15 ), 1 ) );
+
+ /* Clip (shouldn't happen for properly conditioned inputs) */
+ rc_tmp_Q15 = SKP_SAT16( rc_tmp_Q15 );
+
+ /* Store */
+ rc_Q15[ k ] = ( SKP_int16 )rc_tmp_Q15;
+
+ /* Update correlations */
+ for( n = 0; n < order - k; n++ ) {
+ Ctmp1 = C[ n + k + 1 ][ 0 ];
+ Ctmp2 = C[ n ][ 1 ];
+ C[ n + k + 1 ][ 0 ] = SKP_SMLAWB( Ctmp1, SKP_LSHIFT( Ctmp2, 1 ), rc_tmp_Q15 );
+ C[ n ][ 1 ] = SKP_SMLAWB( Ctmp2, SKP_LSHIFT( Ctmp1, 1 ), rc_tmp_Q15 );
+ }
+ }
+
+ /* return residual energy */
+ return C[ 0 ][ 1 ];
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_schur64.c
@@ -1,0 +1,71 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* Slower than schur(), but more accurate. */
+/* Uses SMULL(), available on armv4 */
+SKP_int32 SKP_Silk_schur64( /* O: Returns residual energy */
+ SKP_int32 rc_Q16[], /* O: Reflection coefficients [order] Q16 */
+ const SKP_int32 c[], /* I: Correlations [order+1] */
+ SKP_int32 order /* I: Prediction order */
+)
+{
+ SKP_int k, n;
+ SKP_int32 C[ SKP_Silk_MAX_ORDER_LPC + 1 ][ 2 ];
+ SKP_int32 Ctmp1_Q30, Ctmp2_Q30, rc_tmp_Q31;
+
+ /* Check for invalid input */
+ if( c[ 0 ] <= 0 ) {
+ SKP_memset( rc_Q16, 0, order * sizeof( SKP_int32 ) );
+ return 0;
+ }
+
+ for( k = 0; k < order + 1; k++ ) {
+ C[ k ][ 0 ] = C[ k ][ 1 ] = c[ k ];
+ }
+
+ for( k = 0; k < order; k++ ) {
+ /* Get reflection coefficient: divide two Q30 values and get result in Q31 */
+ rc_tmp_Q31 = SKP_DIV32_varQ( -C[ k + 1 ][ 0 ], C[ 0 ][ 1 ], 31 );
+
+ /* Save the output */
+ rc_Q16[ k ] = SKP_RSHIFT_ROUND( rc_tmp_Q31, 15 );
+
+ /* Update correlations */
+ for( n = 0; n < order - k; n++ ) {
+ Ctmp1_Q30 = C[ n + k + 1 ][ 0 ];
+ Ctmp2_Q30 = C[ n ][ 1 ];
+
+ /* Multiply and add the highest int32 */
+ C[ n + k + 1 ][ 0 ] = Ctmp1_Q30 + SKP_SMMUL( SKP_LSHIFT( Ctmp2_Q30, 1 ), rc_tmp_Q31 );
+ C[ n ][ 1 ] = Ctmp2_Q30 + SKP_SMMUL( SKP_LSHIFT( Ctmp1_Q30, 1 ), rc_tmp_Q31 );
+ }
+ }
+
+ return( C[ 0 ][ 1 ] );
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_sigm_Q15.c
@@ -1,0 +1,78 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_sigm_Q15.c *
+ * *
+ * Approximate sigmoid function *
+ * *
+ * Copyright 2006 (c), Skype Limited *
+ * Date: 060221 *
+ * */
+#include "SKP_Silk_SigProc_FIX.h"
+/********************************/
+/* approximate sigmoid function */
+/********************************/
+/* fprintf(1, '%d, ', round(1024 * ([1 ./ (1 + exp(-(1:5))), 1] - 1 ./ (1 + exp(-(0:5)))))); */
+static const SKP_int32 sigm_LUT_slope_Q10[ 6 ] = {
+ 237, 153, 73, 30, 12, 7
+};
+/* fprintf(1, '%d, ', round(32767 * 1 ./ (1 + exp(-(0:5))))); */
+static const SKP_int32 sigm_LUT_pos_Q15[ 6 ] = {
+ 16384, 23955, 28861, 31213, 32178, 32548
+};
+/* fprintf(1, '%d, ', round(32767 * 1 ./ (1 + exp((0:5))))); */
+static const SKP_int32 sigm_LUT_neg_Q15[ 6 ] = {
+ 16384, 8812, 3906, 1554, 589, 219
+};
+
+SKP_int SKP_Silk_sigm_Q15( SKP_int in_Q5 )
+{
+ SKP_int ind;
+
+ if( in_Q5 < 0 ) {
+ /* Negative input */
+ in_Q5 = -in_Q5;
+ if( in_Q5 >= 6 * 32 ) {
+ return 0; /* Clip */
+ } else {
+ /* Linear interpolation of look up table */
+ ind = SKP_RSHIFT( in_Q5, 5 );
+ return( sigm_LUT_neg_Q15[ ind ] - SKP_SMULBB( sigm_LUT_slope_Q10[ ind ], in_Q5 & 0x1F ) );
+ }
+ } else {
+ /* Positive input */
+ if( in_Q5 >= 6 * 32 ) {
+ return 32767; /* clip */
+ } else {
+ /* Linear interpolation of look up table */
+ ind = SKP_RSHIFT( in_Q5, 5 );
+ return( sigm_LUT_pos_Q15[ ind ] + SKP_SMULBB( sigm_LUT_slope_Q10[ ind ], in_Q5 & 0x1F ) );
+ }
+ }
+}
+
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_sort.c
@@ -1,0 +1,147 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* Insertion sort (fast for already almost sorted arrays): */
+/* Best case: O(n) for an already sorted array */
+/* Worst case: O(n^2) for an inversely sorted array */
+/* */
+/* Shell short: http://en.wikipedia.org/wiki/Shell_sort */
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+void SKP_Silk_insertion_sort_increasing(
+ SKP_int32 *a, /* I/O: Unsorted / Sorted vector */
+ SKP_int *index, /* O: Index vector for the sorted elements */
+ const SKP_int L, /* I: Vector length */
+ const SKP_int K /* I: Number of correctly sorted positions */
+)
+{
+ SKP_int32 value;
+ SKP_int i, j;
+
+ /* Safety checks */
+ SKP_assert( K > 0 );
+ SKP_assert( L > 0 );
+ SKP_assert( L >= K );
+
+ /* Write start indices in index vector */
+ for( i = 0; i < K; i++ ) {
+ index[ i ] = i;
+ }
+
+ /* Sort vector elements by value, increasing order */
+ for( i = 1; i < K; i++ ) {
+ value = a[ i ];
+ for( j = i - 1; ( j >= 0 ) && ( value < a[ j ] ); j-- ) {
+ a[ j + 1 ] = a[ j ]; /* Shift value */
+ index[ j + 1 ] = index[ j ]; /* Shift index */
+ }
+ a[ j + 1 ] = value; /* Write value */
+ index[ j + 1 ] = i; /* Write index */
+ }
+
+ /* If less than L values are asked for, check the remaining values, */
+ /* but only spend CPU to ensure that the K first values are correct */
+ for( i = K; i < L; i++ ) {
+ value = a[ i ];
+ if( value < a[ K - 1 ] ) {
+ for( j = K - 2; ( j >= 0 ) && ( value < a[ j ] ); j-- ) {
+ a[ j + 1 ] = a[ j ]; /* Shift value */
+ index[ j + 1 ] = index[ j ]; /* Shift index */
+ }
+ a[ j + 1 ] = value; /* Write value */
+ index[ j + 1 ] = i; /* Write index */
+ }
+ }
+}
+
+void SKP_Silk_insertion_sort_decreasing_int16(
+ SKP_int16 *a, /* I/O: Unsorted / Sorted vector */
+ SKP_int *index, /* O: Index vector for the sorted elements */
+ const SKP_int L, /* I: Vector length */
+ const SKP_int K /* I: Number of correctly sorted positions */
+)
+{
+ SKP_int i, j;
+ SKP_int value;
+
+ /* Safety checks */
+ SKP_assert( K > 0 );
+ SKP_assert( L > 0 );
+ SKP_assert( L >= K );
+
+ /* Write start indices in index vector */
+ for( i = 0; i < K; i++ ) {
+ index[ i ] = i;
+ }
+
+ /* Sort vector elements by value, decreasing order */
+ for( i = 1; i < K; i++ ) {
+ value = a[ i ];
+ for( j = i - 1; ( j >= 0 ) && ( value > a[ j ] ); j-- ) {
+ a[ j + 1 ] = a[ j ]; /* Shift value */
+ index[ j + 1 ] = index[ j ]; /* Shift index */
+ }
+ a[ j + 1 ] = value; /* Write value */
+ index[ j + 1 ] = i; /* Write index */
+ }
+
+ /* If less than L values are asked for, check the remaining values, */
+ /* but only spend CPU to ensure that the K first values are correct */
+ for( i = K; i < L; i++ ) {
+ value = a[ i ];
+ if( value > a[ K - 1 ] ) {
+ for( j = K - 2; ( j >= 0 ) && ( value > a[ j ] ); j-- ) {
+ a[ j + 1 ] = a[ j ]; /* Shift value */
+ index[ j + 1 ] = index[ j ]; /* Shift index */
+ }
+ a[ j + 1 ] = value; /* Write value */
+ index[ j + 1 ] = i; /* Write index */
+ }
+ }
+}
+
+void SKP_Silk_insertion_sort_increasing_all_values_int16(
+ SKP_int16 *a, /* I/O: Unsorted / Sorted vector */
+ const SKP_int L /* I: Vector length */
+)
+{
+ SKP_int value;
+ SKP_int i, j;
+
+ /* Safety checks */
+ SKP_assert( L > 0 );
+
+ /* Sort vector elements by value, increasing order */
+ for( i = 1; i < L; i++ ) {
+ value = a[ i ];
+ for( j = i - 1; ( j >= 0 ) && ( value < a[ j ] ); j-- ) {
+ a[ j + 1 ] = a[ j ]; /* Shift value */
+ }
+ a[ j + 1 ] = value; /* Write value */
+ }
+}
--- /dev/null
+++ b/src_SigProc_FIX/SKP_Silk_sum_sqr_shift.c
@@ -1,0 +1,81 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FIX.h"
+
+/* Compute number of bits to right shift the sum of squares of a vector */
+/* of int16s to make it fit in an int32 */
+void SKP_Silk_sum_sqr_shift(
+ SKP_int32 *energy, /* O Energy of x, after shifting to the right */
+ SKP_int *shift, /* O Number of bits right shift applied to energy */
+ const SKP_int16 *x, /* I Input vector */
+ SKP_int len /* I Length of input vector */
+)
+{
+ SKP_int i, shft;
+ SKP_int32 nrg_tmp, nrg;
+
+ nrg = 0;
+ shft = 0;
+ len--;
+ for( i = 0; i < len; i += 2 ) {
+ nrg = SKP_SMLABB_ovflw( nrg, x[ i ], x[ i ] );
+ nrg = SKP_SMLABB_ovflw( nrg, x[ i + 1 ], x[ i + 1 ] );
+ if( nrg < 0 ) {
+ /* Scale down */
+ nrg = (SKP_int32)SKP_RSHIFT_uint( (SKP_uint32)nrg, 2 );
+ shft = 2;
+ break;
+ }
+ }
+ for( ; i < len; i += 2 ) {
+ nrg_tmp = SKP_SMULBB( x[ i ], x[ i ] );
+ nrg_tmp = SKP_SMLABB_ovflw( nrg_tmp, x[ i + 1 ], x[ i + 1 ] );
+ nrg = (SKP_int32)SKP_ADD_RSHIFT_uint( nrg, (SKP_uint32)nrg_tmp, shft );
+ if( nrg < 0 ) {
+ /* Scale down */
+ nrg = (SKP_int32)SKP_RSHIFT_uint( (SKP_uint32)nrg, 2 );
+ shft += 2;
+ }
+ }
+ if( i == len ) {
+ /* One sample left to process */
+ nrg_tmp = SKP_SMULBB( x[ i ], x[ i ] );
+ nrg = (SKP_int32)SKP_ADD_RSHIFT_uint( nrg, nrg_tmp, shft );
+ }
+
+ /* Make sure to have at least one extra leading zero (two leading zeros in total) */
+ if( nrg & 0xC0000000 ) {
+ nrg = SKP_RSHIFT_uint( (SKP_uint32)nrg, 2 );
+ shft += 2;
+ }
+
+ /* Output arguments */
+ *shift = shft;
+ *energy = nrg;
+}
+
--- /dev/null
+++ b/src_SigProc_FIX/src_SigProc_FIX.vcxproj
@@ -1,0 +1,141 @@
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+ <AdditionalIncludeDirectories>../interface;..\..\celt\libcelt</AdditionalIncludeDirectories>
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+ <Link>
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+ <OptimizeReferences>true</OptimizeReferences>
+ </Link>
+ </ItemDefinitionGroup>
+ <ItemGroup>
+ <None Include="ReadMe.txt" />
+ </ItemGroup>
+ <ItemGroup>
+ <ClInclude Include="..\interface\SKP_debug.h" />
+ <ClInclude Include="SKP_Silk_pitch_est_defines.h" />
+ <ClInclude Include="SKP_Silk_Inlines.h" />
+ <ClInclude Include="SKP_Silk_MacroCount.h" />
+ <ClInclude Include="SKP_Silk_MacroDebug.h" />
+ <ClInclude Include="SKP_Silk_macros.h" />
+ <ClInclude Include="SKP_Silk_resampler_private.h" />
+ <ClInclude Include="SKP_Silk_resampler_rom.h" />
+ <ClInclude Include="SKP_Silk_resampler_structs.h" />
+ <ClInclude Include="SKP_Silk_SigProc_FIX.h" />
+ </ItemGroup>
+ <ItemGroup>
+ <ClCompile Include="SKP_Silk_A2NLSF.c" />
+ <ClCompile Include="SKP_Silk_ana_filt_bank_1.c" />
+ <ClCompile Include="SKP_Silk_apply_sine_window.c" />
+ <ClCompile Include="SKP_Silk_array_maxabs.c" />
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--- /dev/null
+++ b/src_SigProc_FLP/SKP_Silk_LPC_inv_pred_gain_FLP.c
@@ -1,0 +1,81 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_LPC_inverse_pred_gain.c *
+ * *
+ * compute inverse of LPC prediction gain, and *
+ * test if LPC coefficients are stable (all poles within unit circle) *
+ * *
+ * Copyright 2008 (c), Skype Limited *
+ * */
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_SigProc_FLP.h"
+
+#define RC_THRESHOLD 0.9999f
+
+/* compute inverse of LPC prediction gain, and */
+/* test if LPC coefficients are stable (all poles within unit circle) */
+/* this code is based on SKP_Silk_a2k_FLP() */
+SKP_int SKP_Silk_LPC_inverse_pred_gain_FLP( /* O: returns 1 if unstable, otherwise 0 */
+ SKP_float *invGain, /* O: inverse prediction gain, energy domain */
+ const SKP_float *A, /* I: prediction coefficients [order] */
+ SKP_int32 order /* I: prediction order */
+)
+{
+ SKP_int k, n;
+ double rc, rc_mult1, rc_mult2;
+ SKP_float Atmp[ 2 ][ SKP_Silk_MAX_ORDER_LPC ];
+ SKP_float *Aold, *Anew;
+
+ Anew = Atmp[ order & 1 ];
+ SKP_memcpy( Anew, A, order * sizeof(SKP_float) );
+
+ *invGain = 1.0f;
+ for( k = order - 1; k > 0; k-- ) {
+ rc = -Anew[ k ];
+ if (rc > RC_THRESHOLD || rc < -RC_THRESHOLD) {
+ return 1;
+ }
+ rc_mult1 = 1.0f - rc * rc;
+ rc_mult2 = 1.0f / rc_mult1;
+ *invGain *= (SKP_float)rc_mult1;
+ /* swap pointers */
+ Aold = Anew;
+ Anew = Atmp[ k & 1 ];
+ for( n = 0; n < k; n++ ) {
+ Anew[ n ] = (SKP_float)( ( Aold[ n ] - Aold[ k - n - 1 ] * rc ) * rc_mult2 );
+ }
+ }
+ rc = -Anew[ 0 ];
+ if ( rc > RC_THRESHOLD || rc < -RC_THRESHOLD ) {
+ return 1;
+ }
+ rc_mult1 = 1.0f - rc * rc;
+ *invGain *= (SKP_float)rc_mult1;
+ return 0;
+}
--- /dev/null
+++ b/src_SigProc_FLP/SKP_Silk_SigProc_FLP.h
@@ -1,0 +1,215 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+
+#ifndef _SKP_SILK_SIGPROC_FLP_H_
+#define _SKP_SILK_SIGPROC_FLP_H_
+
+#include "SKP_Silk_SigProc_FIX.h"
+#include "float_cast.h"
+#include <math.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/********************************************************************/
+/* SIGNAL PROCESSING FUNCTIONS */
+/********************************************************************/
+
+/* Chirp (bw expand) LP AR filter */
+void SKP_Silk_bwexpander_FLP(
+ SKP_float *ar, /* io AR filter to be expanded (without leading 1) */
+ const SKP_int d, /* i length of ar */
+ const SKP_float chirp /* i chirp factor (typically in range (0..1) ) */
+);
+
+/* compute inverse of LPC prediction gain, and */
+/* test if LPC coefficients are stable (all poles within unit circle) */
+/* this code is based on SKP_Silk_FLP_a2k() */
+SKP_int SKP_Silk_LPC_inverse_pred_gain_FLP( /* O: returns 1 if unstable, otherwise 0 */
+ SKP_float *invGain, /* O: inverse prediction gain, energy domain */
+ const SKP_float *A, /* I: prediction coefficients [order] */
+ SKP_int32 order /* I: prediction order */
+);
+
+SKP_float SKP_Silk_schur_FLP( /* O returns residual energy */
+ SKP_float refl_coef[], /* O reflection coefficients (length order) */
+ const SKP_float auto_corr[], /* I autocorrelation sequence (length order+1) */
+ SKP_int order /* I order */
+);
+
+void SKP_Silk_k2a_FLP(
+ SKP_float *A, /* O: prediction coefficients [order] */
+ const SKP_float *rc, /* I: reflection coefficients [order] */
+ SKP_int32 order /* I: prediction order */
+);
+
+/* Solve the normal equations using the Levinson-Durbin recursion */
+SKP_float SKP_Silk_levinsondurbin_FLP( /* O prediction error energy */
+ SKP_float A[], /* O prediction coefficients [order] */
+ const SKP_float corr[], /* I input auto-correlations [order + 1] */
+ const SKP_int order /* I prediction order */
+);
+
+/* compute autocorrelation */
+void SKP_Silk_autocorrelation_FLP(
+ SKP_float *results, /* o result (length correlationCount) */
+ const SKP_float *inputData, /* i input data to correlate */
+ SKP_int inputDataSize, /* i length of input */
+ SKP_int correlationCount /* i number of correlation taps to compute */
+);
+
+/* Pitch estimator */
+#define SigProc_PE_MIN_COMPLEX 0
+#define SigProc_PE_MID_COMPLEX 1
+#define SigProc_PE_MAX_COMPLEX 2
+
+SKP_int SKP_Silk_pitch_analysis_core_FLP( /* O voicing estimate: 0 voiced, 1 unvoiced */
+ const SKP_float *signal, /* I signal of length PE_FRAME_LENGTH_MS*Fs_kHz */
+ SKP_int *pitch_out, /* O 4 pitch lag values */
+ SKP_int16 *lagIndex, /* O lag Index */
+ SKP_int8 *contourIndex, /* O pitch contour Index */
+ SKP_float *LTPCorr, /* I/O normalized correlation; input: value from previous frame */
+ SKP_int prevLag, /* I last lag of previous frame; set to zero is unvoiced */
+ const SKP_float search_thres1, /* I first stage threshold for lag candidates 0 - 1 */
+ const SKP_float search_thres2, /* I final threshold for lag candidates 0 - 1 */
+ const SKP_int Fs_kHz, /* I sample frequency (kHz) */
+ const SKP_int complexity, /* I Complexity setting, 0-2, where 2 is highest */
+ const SKP_int nb_subfr /* I number of 5 ms subframes */
+);
+
+#define PI (3.1415926536f)
+
+void SKP_Silk_insertion_sort_decreasing_FLP(
+ SKP_float *a, /* I/O: Unsorted / Sorted vector */
+ SKP_int *index, /* O: Index vector for the sorted elements */
+ const SKP_int L, /* I: Vector length */
+ const SKP_int K /* I: Number of correctly sorted positions */
+);
+
+/* Compute reflection coefficients from input signal */
+SKP_float SKP_Silk_burg_modified_FLP( /* O returns residual energy */
+ SKP_float A[], /* O prediction coefficients (length order) */
+ const SKP_float x[], /* I input signal, length: nb_subfr*(D+L_sub) */
+ const SKP_int subfr_length, /* I input signal subframe length (including D preceeding samples) */
+ const SKP_int nb_subfr, /* I number of subframes stacked in x */
+ const SKP_float WhiteNoiseFrac, /* I fraction added to zero-lag autocorrelation */
+ const SKP_int D /* I order */
+);
+
+/* multiply a vector by a constant */
+void SKP_Silk_scale_vector_FLP(
+ SKP_float *data1,
+ SKP_float gain,
+ SKP_int dataSize
+);
+
+/* copy and multiply a vector by a constant */
+void SKP_Silk_scale_copy_vector_FLP(
+ SKP_float *data_out,
+ const SKP_float *data_in,
+ SKP_float gain,
+ SKP_int dataSize
+);
+
+/* inner product of two SKP_float arrays, with result as double */
+double SKP_Silk_inner_product_FLP(
+ const SKP_float *data1,
+ const SKP_float *data2,
+ SKP_int dataSize
+);
+
+/* sum of squares of a SKP_float array, with result as double */
+double SKP_Silk_energy_FLP(
+ const SKP_float *data,
+ SKP_int dataSize
+);
+
+/********************************************************************/
+/* MACROS */
+/********************************************************************/
+
+#define SKP_min_float(a, b) (((a) < (b)) ? (a) : (b))
+#define SKP_max_float(a, b) (((a) > (b)) ? (a) : (b))
+#define SKP_abs_float(a) ((SKP_float)fabs(a))
+
+#define SKP_LIMIT_float( a, limit1, limit2) ((limit1) > (limit2) ? ((a) > (limit1) ? (limit1) : ((a) < (limit2) ? (limit2) : (a))) \
+ : ((a) > (limit2) ? (limit2) : ((a) < (limit1) ? (limit1) : (a))))
+
+/* sigmoid function */
+SKP_INLINE SKP_float SKP_sigmoid(SKP_float x)
+{
+ return (SKP_float)(1.0 / (1.0 + exp(-x)));
+}
+
+/* floating-point to integer conversion (rounding) */
+#if 1
+/* use implementation in float_cast.h */
+#define SKP_float2int(x) float2int(x)
+#else
+SKP_INLINE SKP_int32 SKP_float2int(SKP_float x)
+{
+ double y = x;
+ return (SKP_int32)( ( y > 0 ) ? y + 0.5 : y - 0.5 );
+}
+#endif
+
+/* floating-point to integer conversion (rounding) */
+SKP_INLINE void SKP_float2short_array(
+ SKP_int16 *out,
+ const SKP_float *in,
+ SKP_int32 length
+)
+{
+ SKP_int32 k;
+ for (k = length-1; k >= 0; k--) {
+ out[k] = (SKP_int16)SKP_SAT16( float2int( in[k] ) );
+ }
+}
+
+/* integer to floating-point conversion */
+SKP_INLINE void SKP_short2float_array(
+ SKP_float *out,
+ const SKP_int16 *in,
+ SKP_int32 length
+)
+{
+ SKP_int32 k;
+ for (k = length-1; k >= 0; k--) {
+ out[k] = (SKP_float)in[k];
+ }
+}
+
+#define SKP_round(x) (SKP_float)((x)>=0 ? (SKP_int64)((x)+0.5) : (SKP_int64)((x)-0.5))
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+++ b/src_SigProc_FLP/SKP_Silk_autocorrelation_FLP.c
@@ -1,0 +1,48 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_typedef.h"
+#include "SKP_Silk_SigProc_FLP.h"
+
+/* compute autocorrelation */
+void SKP_Silk_autocorrelation_FLP(
+ SKP_float *results, /* O result (length correlationCount) */
+ const SKP_float *inputData, /* I input data to correlate */
+ SKP_int inputDataSize, /* I length of input */
+ SKP_int correlationCount /* I number of correlation taps to compute */
+)
+{
+ SKP_int i;
+
+ if ( correlationCount > inputDataSize ) {
+ correlationCount = inputDataSize;
+ }
+
+ for( i = 0; i < correlationCount; i++ ) {
+ results[ i ] = (SKP_float)SKP_Silk_inner_product_FLP( inputData, inputData + i, inputDataSize - i );
+ }
+}
--- /dev/null
+++ b/src_SigProc_FLP/SKP_Silk_burg_modified_FLP.c
@@ -1,0 +1,154 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_burg_modified.c *
+ * *
+ * Calculates the reflection coefficients from the input vector *
+ * Input vector contains nb_subfr sub vectors of length L_sub + D *
+ * *
+ * Copyright 2009 (c), Skype Limited *
+ * Date: 091130 *
+ */
+
+#include "SKP_Silk_SigProc_FLP.h"
+
+#define MAX_FRAME_SIZE 384 // subfr_length * nb_subfr = ( 0.005 * 16000 + 16 ) * 4 = 384
+#define MAX_NB_SUBFR 4
+
+/* Compute reflection coefficients from input signal */
+SKP_float SKP_Silk_burg_modified_FLP( /* O returns residual energy */
+ SKP_float A[], /* O prediction coefficients (length order) */
+ const SKP_float x[], /* I input signal, length: nb_subfr*(D+L_sub) */
+ const SKP_int subfr_length, /* I input signal subframe length (including D preceeding samples) */
+ const SKP_int nb_subfr, /* I number of subframes stacked in x */
+ const SKP_float WhiteNoiseFrac, /* I fraction added to zero-lag autocorrelation */
+ const SKP_int D /* I order */
+)
+{
+ SKP_int k, n, s;
+ double C0, num, nrg_f, nrg_b, rc, Atmp, tmp1, tmp2;
+ const SKP_float *x_ptr;
+ double C_first_row[ SKP_Silk_MAX_ORDER_LPC ], C_last_row[ SKP_Silk_MAX_ORDER_LPC ];
+ double CAf[ SKP_Silk_MAX_ORDER_LPC + 1 ], CAb[ SKP_Silk_MAX_ORDER_LPC + 1 ];
+ double Af[ SKP_Silk_MAX_ORDER_LPC ];
+
+ SKP_assert( subfr_length * nb_subfr <= MAX_FRAME_SIZE );
+ SKP_assert( nb_subfr <= MAX_NB_SUBFR );
+
+ /* Compute autocorrelations, added over subframes */
+ C0 = SKP_Silk_energy_FLP( x, nb_subfr * subfr_length );
+ SKP_memset( C_first_row, 0, SKP_Silk_MAX_ORDER_LPC * sizeof( double ) );
+ for( s = 0; s < nb_subfr; s++ ) {
+ x_ptr = x + s * subfr_length;
+ for( n = 1; n < D + 1; n++ ) {
+ C_first_row[ n - 1 ] += SKP_Silk_inner_product_FLP( x_ptr, x_ptr + n, subfr_length - n );
+ }
+ }
+ SKP_memcpy( C_last_row, C_first_row, SKP_Silk_MAX_ORDER_LPC * sizeof( double ) );
+
+ /* Initialize */
+ CAb[ 0 ] = CAf[ 0 ] = C0 + WhiteNoiseFrac * C0 + 1e-9f;
+
+ for( n = 0; n < D; n++ ) {
+ /* Update first row of correlation matrix (without first element) */
+ /* Update last row of correlation matrix (without last element, stored in reversed order) */
+ /* Update C * Af */
+ /* Update C * flipud(Af) (stored in reversed order) */
+ for( s = 0; s < nb_subfr; s++ ) {
+ x_ptr = x + s * subfr_length;
+ tmp1 = x_ptr[ n ];
+ tmp2 = x_ptr[ subfr_length - n - 1 ];
+ for( k = 0; k < n; k++ ) {
+ C_first_row[ k ] -= x_ptr[ n ] * x_ptr[ n - k - 1 ];
+ C_last_row[ k ] -= x_ptr[ subfr_length - n - 1 ] * x_ptr[ subfr_length - n + k ];
+ Atmp = Af[ k ];
+ tmp1 += x_ptr[ n - k - 1 ] * Atmp;
+ tmp2 += x_ptr[ subfr_length - n + k ] * Atmp;
+ }
+ for( k = 0; k <= n; k++ ) {
+ CAf[ k ] -= tmp1 * x_ptr[ n - k ];
+ CAb[ k ] -= tmp2 * x_ptr[ subfr_length - n + k - 1 ];
+ }
+ }
+ tmp1 = C_first_row[ n ];
+ tmp2 = C_last_row[ n ];
+ for( k = 0; k < n; k++ ) {
+ Atmp = Af[ k ];
+ tmp1 += C_last_row[ n - k - 1 ] * Atmp;
+ tmp2 += C_first_row[ n - k - 1 ] * Atmp;
+ }
+ CAf[ n + 1 ] = tmp1;
+ CAb[ n + 1 ] = tmp2;
+
+ /* Calculate nominator and denominator for the next order reflection (parcor) coefficient */
+ num = CAb[ n + 1 ];
+ nrg_b = CAb[ 0 ];
+ nrg_f = CAf[ 0 ];
+ for( k = 0; k < n; k++ ) {
+ Atmp = Af[ k ];
+ num += CAb[ n - k ] * Atmp;
+ nrg_b += CAb[ k + 1 ] * Atmp;
+ nrg_f += CAf[ k + 1 ] * Atmp;
+ }
+ SKP_assert( nrg_f > 0.0 );
+ SKP_assert( nrg_b > 0.0 );
+
+ /* Calculate the next order reflection (parcor) coefficient */
+ rc = -2.0 * num / ( nrg_f + nrg_b );
+ SKP_assert( rc > -1.0 && rc < 1.0 );
+
+ /* Update the AR coefficients */
+ for( k = 0; k < (n + 1) >> 1; k++ ) {
+ tmp1 = Af[ k ];
+ tmp2 = Af[ n - k - 1 ];
+ Af[ k ] = tmp1 + rc * tmp2;
+ Af[ n - k - 1 ] = tmp2 + rc * tmp1;
+ }
+ Af[ n ] = rc;
+
+ /* Update C * Af and C * Ab */
+ for( k = 0; k <= n + 1; k++ ) {
+ tmp1 = CAf[ k ];
+ CAf[ k ] += rc * CAb[ n - k + 1 ];
+ CAb[ n - k + 1 ] += rc * tmp1;
+ }
+ }
+
+ /* Return residual energy */
+ nrg_f = CAf[ 0 ];
+ tmp1 = 1.0;
+ for( k = 0; k < D; k++ ) {
+ Atmp = Af[ k ];
+ nrg_f += CAf[ k + 1 ] * Atmp;
+ tmp1 += Atmp * Atmp;
+ A[ k ] = (SKP_float)(-Atmp);
+ }
+ nrg_f -= WhiteNoiseFrac * C0 * tmp1;
+
+ return (SKP_float)nrg_f;
+}
--- /dev/null
+++ b/src_SigProc_FLP/SKP_Silk_bwexpander_FLP.c
@@ -1,0 +1,47 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+
+#include "SKP_Silk_SigProc_FLP.h"
+
+
+/* Chirp (bw expand) LP AR filter */
+void SKP_Silk_bwexpander_FLP(
+ SKP_float *ar, /* I/O AR filter to be expanded (without leading 1) */
+ const SKP_int d, /* I length of ar */
+ const SKP_float chirp /* I chirp factor (typically in range (0..1) ) */
+)
+{
+ SKP_int i;
+ SKP_float cfac = chirp;
+
+ for( i = 0; i < d - 1; i++ ) {
+ ar[ i ] *= cfac;
+ cfac *= chirp;
+ }
+ ar[ d - 1 ] *= cfac;
+}
--- /dev/null
+++ b/src_SigProc_FLP/SKP_Silk_energy_FLP.c
@@ -1,0 +1,56 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FLP.h"
+
+/* sum of squares of a SKP_float array, with result as double */
+double SKP_Silk_energy_FLP(
+ const SKP_float *data,
+ SKP_int dataSize
+)
+{
+ SKP_int i, dataSize4;
+ double result;
+
+ /* 4x unrolled loop */
+ result = 0.0f;
+ dataSize4 = dataSize & 0xFFFC;
+ for( i = 0; i < dataSize4; i += 4 ) {
+ result += data[ i + 0 ] * data[ i + 0 ] +
+ data[ i + 1 ] * data[ i + 1 ] +
+ data[ i + 2 ] * data[ i + 2 ] +
+ data[ i + 3 ] * data[ i + 3 ];
+ }
+
+ /* add any remaining products */
+ for( ; i < dataSize; i++ ) {
+ result += data[ i ] * data[ i ];
+ }
+
+ SKP_assert( result >= 0.0 );
+ return result;
+}
--- /dev/null
+++ b/src_SigProc_FLP/SKP_Silk_inner_product_FLP.c
@@ -1,0 +1,56 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FLP.h"
+
+/* inner product of two SKP_float arrays, with result as double */
+double SKP_Silk_inner_product_FLP( /* O result */
+ const SKP_float *data1, /* I vector 1 */
+ const SKP_float *data2, /* I vector 2 */
+ SKP_int dataSize /* I length of vectors */
+)
+{
+ SKP_int i, dataSize4;
+ double result;
+
+ /* 4x unrolled loop */
+ result = 0.0f;
+ dataSize4 = dataSize & 0xFFFC;
+ for( i = 0; i < dataSize4; i += 4 ) {
+ result += data1[ i + 0 ] * data2[ i + 0 ] +
+ data1[ i + 1 ] * data2[ i + 1 ] +
+ data1[ i + 2 ] * data2[ i + 2 ] +
+ data1[ i + 3 ] * data2[ i + 3 ];
+ }
+
+ /* add any remaining products */
+ for( ; i < dataSize; i++ ) {
+ result += data1[ i ] * data2[ i ];
+ }
+
+ return result;
+}
--- /dev/null
+++ b/src_SigProc_FLP/SKP_Silk_k2a_FLP.c
@@ -1,0 +1,58 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_k2a.c *
+ * *
+ * step up function, converts reflection coefficients to prediction *
+ * coefficients *
+ * *
+ * Copyright 2008 (c), Skype Limited *
+ * Date: 080103 *
+ * */
+#include "SKP_Silk_SigProc_FLP.h"
+
+/* step up function, converts reflection coefficients to prediction coefficients */
+void SKP_Silk_k2a_FLP(
+ SKP_float *A, /* O: prediction coefficients [order] */
+ const SKP_float *rc, /* I: reflection coefficients [order] */
+ SKP_int32 order /* I: prediction order */
+)
+{
+ SKP_int k, n;
+ SKP_float Atmp[ SKP_Silk_MAX_ORDER_LPC ];
+
+ for( k = 0; k < order; k++ ){
+ for( n = 0; n < k; n++ ){
+ Atmp[ n ] = A[ n ];
+ }
+ for( n = 0; n < k; n++ ) {
+ A[ n ] += Atmp[ k - n - 1 ] * rc[ k ];
+ }
+ A[ k ] = -rc[ k ];
+ }
+}
--- /dev/null
+++ b/src_SigProc_FLP/SKP_Silk_levinsondurbin_FLP.c
@@ -1,0 +1,77 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FLP.h"
+
+/* Solve the normal equations using the Levinson-Durbin recursion */
+SKP_float SKP_Silk_levinsondurbin_FLP( /* O prediction error energy */
+ SKP_float A[], /* O prediction coefficients [order] */
+ const SKP_float corr[], /* I input auto-correlations [order + 1] */
+ const SKP_int order /* I prediction order */
+)
+{
+ SKP_int i, mHalf, m;
+ SKP_float min_nrg, nrg, t, km, Atmp1, Atmp2;
+
+ min_nrg = 1e-12f * corr[ 0 ] + 1e-9f;
+ nrg = corr[ 0 ];
+ nrg = SKP_max_float(min_nrg, nrg);
+ A[ 0 ] = corr[ 1 ] / nrg;
+ nrg -= A[ 0 ] * corr[ 1 ];
+ nrg = SKP_max_float(min_nrg, nrg);
+
+ for( m = 1; m < order; m++ )
+ {
+ t = corr[ m + 1 ];
+ for( i = 0; i < m; i++ ) {
+ t -= A[ i ] * corr[ m - i ];
+ }
+
+ /* reflection coefficient */
+ km = t / nrg;
+
+ /* residual energy */
+ nrg -= km * t;
+ nrg = SKP_max_float(min_nrg, nrg);
+
+ mHalf = m >> 1;
+ for( i = 0; i < mHalf; i++ ) {
+ Atmp1 = A[ i ];
+ Atmp2 = A[ m - i - 1 ];
+ A[ m - i - 1 ] -= km * Atmp1;
+ A[ i ] -= km * Atmp2;
+ }
+ if( m & 1 ) {
+ A[ mHalf ] -= km * A[ mHalf ];
+ }
+ A[ m ] = km;
+ }
+
+ /* return the residual energy */
+ return nrg;
+}
+
--- /dev/null
+++ b/src_SigProc_FLP/SKP_Silk_pitch_analysis_core_FLP.c
@@ -1,0 +1,635 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/*****************************************************************************
+*
+* Pitch analyser function
+*
+******************************************************************************/
+#include "SKP_Silk_SigProc_FLP.h"
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_pitch_est_defines.h"
+
+#define SCRATCH_SIZE 22
+
+/************************************************************/
+/* Definitions */
+/************************************************************/
+#define eps 1.192092896e-07f
+
+/* using log2() helps the fixed-point conversion */
+SKP_INLINE SKP_float SKP_P_log2(double x) { return (SKP_float)(3.32192809488736 * log10(x)); }
+
+/************************************************************/
+/* Internally used functions */
+/************************************************************/
+static void SKP_P_Ana_calc_corr_st3(
+ SKP_float cross_corr_st3[ PE_MAX_NB_SUBFR ][ PE_NB_CBKS_STAGE3_MAX ][ PE_NB_STAGE3_LAGS ], /* O 3 DIM correlation array */
+ const SKP_float signal[], /* I vector to correlate */
+ SKP_int start_lag, /* I start lag */
+ SKP_int sf_length, /* I sub frame length */
+ SKP_int nb_subfr, /* I number of subframes */
+ SKP_int complexity /* I Complexity setting */
+);
+
+static void SKP_P_Ana_calc_energy_st3(
+ SKP_float energies_st3[ PE_MAX_NB_SUBFR ][ PE_NB_CBKS_STAGE3_MAX ][ PE_NB_STAGE3_LAGS ], /* O 3 DIM correlation array */
+ const SKP_float signal[], /* I vector to correlate */
+ SKP_int start_lag, /* I start lag */
+ SKP_int sf_length, /* I sub frame length */
+ SKP_int nb_subfr, /* I number of subframes */
+ SKP_int complexity /* I Complexity setting */
+);
+
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+//% CORE PITCH ANALYSIS FUNCTION %
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+SKP_int SKP_Silk_pitch_analysis_core_FLP( /* O voicing estimate: 0 voiced, 1 unvoiced */
+ const SKP_float *signal, /* I signal of length PE_FRAME_LENGTH_MS*Fs_kHz */
+ SKP_int *pitch_out, /* O 4 pitch lag values */
+ SKP_int16 *lagIndex, /* O lag Index */
+ SKP_int8 *contourIndex, /* O pitch contour Index */
+ SKP_float *LTPCorr, /* I/O normalized correlation; input: value from previous frame */
+ SKP_int prevLag, /* I last lag of previous frame; set to zero is unvoiced */
+ const SKP_float search_thres1, /* I first stage threshold for lag candidates 0 - 1 */
+ const SKP_float search_thres2, /* I final threshold for lag candidates 0 - 1 */
+ const SKP_int Fs_kHz, /* I sample frequency (kHz) */
+ const SKP_int complexity, /* I Complexity setting, 0-2, where 2 is highest */
+ const SKP_int nb_subfr /* I number of 5 ms subframes */
+)
+{
+ SKP_int i, k, d, j;
+ SKP_float signal_8kHz[ PE_MAX_FRAME_LENGTH_MS * 8 ];
+ SKP_float signal_4kHz[ PE_MAX_FRAME_LENGTH_MS * 4 ];
+ SKP_int16 signal_8_FIX[ PE_MAX_FRAME_LENGTH_MS * 8 ];
+ SKP_int16 signal_4_FIX[ PE_MAX_FRAME_LENGTH_MS * 4 ];
+ SKP_int32 filt_state[ 6 ];
+ SKP_float threshold, contour_bias;
+ SKP_float C[ PE_MAX_NB_SUBFR][ (PE_MAX_LAG >> 1) + 5 ];
+ SKP_float CC[ PE_NB_CBKS_STAGE2_EXT ];
+ const SKP_float *target_ptr, *basis_ptr;
+ double cross_corr, normalizer, energy, energy_tmp;
+ SKP_int d_srch[ PE_D_SRCH_LENGTH ];
+ SKP_int16 d_comp[ (PE_MAX_LAG >> 1) + 5 ];
+ SKP_int length_d_srch, length_d_comp;
+ SKP_float Cmax, CCmax, CCmax_b, CCmax_new_b, CCmax_new;
+ SKP_int CBimax, CBimax_new, lag, start_lag, end_lag, lag_new;
+ SKP_int cbk_size;
+ SKP_float lag_log2, prevLag_log2, delta_lag_log2_sqr;
+ SKP_float energies_st3[ PE_MAX_NB_SUBFR ][ PE_NB_CBKS_STAGE3_MAX ][ PE_NB_STAGE3_LAGS ];
+ SKP_float cross_corr_st3[ PE_MAX_NB_SUBFR ][ PE_NB_CBKS_STAGE3_MAX ][ PE_NB_STAGE3_LAGS ];
+ SKP_int lag_counter;
+ SKP_int frame_length, frame_length_8kHz, frame_length_4kHz;
+ SKP_int sf_length, sf_length_8kHz, sf_length_4kHz;
+ SKP_int min_lag, min_lag_8kHz, min_lag_4kHz;
+ SKP_int max_lag, max_lag_8kHz, max_lag_4kHz;
+ SKP_int nb_cbk_search;
+ const SKP_int8 *Lag_CB_ptr;
+
+ /* Check for valid sampling frequency */
+ SKP_assert( Fs_kHz == 8 || Fs_kHz == 12 || Fs_kHz == 16 );
+
+ /* Check for valid complexity setting */
+ SKP_assert( complexity >= SigProc_PE_MIN_COMPLEX );
+ SKP_assert( complexity <= SigProc_PE_MAX_COMPLEX );
+
+ SKP_assert( search_thres1 >= 0.0f && search_thres1 <= 1.0f );
+ SKP_assert( search_thres2 >= 0.0f && search_thres2 <= 1.0f );
+
+ /* Setup frame lengths max / min lag for the sampling frequency */
+ frame_length = ( PE_LTP_MEM_LENGTH_MS + nb_subfr * PE_SUBFR_LENGTH_MS ) * Fs_kHz;
+ frame_length_4kHz = ( PE_LTP_MEM_LENGTH_MS + nb_subfr * PE_SUBFR_LENGTH_MS ) * 4;
+ frame_length_8kHz = ( PE_LTP_MEM_LENGTH_MS + nb_subfr * PE_SUBFR_LENGTH_MS ) * 8;
+ sf_length = PE_SUBFR_LENGTH_MS * Fs_kHz;
+ sf_length_4kHz = PE_SUBFR_LENGTH_MS * 4;
+ sf_length_8kHz = PE_SUBFR_LENGTH_MS * 8;
+ min_lag = PE_MIN_LAG_MS * Fs_kHz;
+ min_lag_4kHz = PE_MIN_LAG_MS * 4;
+ min_lag_8kHz = PE_MIN_LAG_MS * 8;
+ max_lag = PE_MAX_LAG_MS * Fs_kHz - 1;
+ max_lag_4kHz = PE_MAX_LAG_MS * 4;
+ max_lag_8kHz = PE_MAX_LAG_MS * 8 - 1;
+
+ SKP_memset(C, 0, sizeof(SKP_float) * nb_subfr * ((PE_MAX_LAG >> 1) + 5));
+
+ /* Resample from input sampled at Fs_kHz to 8 kHz */
+ if( Fs_kHz == 16 ) {
+ /* Resample to 16 -> 8 khz */
+ SKP_int16 signal_16_FIX[ 16 * PE_MAX_FRAME_LENGTH_MS ];
+ SKP_float2short_array( signal_16_FIX, signal, frame_length );
+ SKP_memset( filt_state, 0, 2 * sizeof( SKP_int32 ) );
+ SKP_Silk_resampler_down2( filt_state, signal_8_FIX, signal_16_FIX, frame_length );
+ SKP_short2float_array( signal_8kHz, signal_8_FIX, frame_length_8kHz );
+ } else if( Fs_kHz == 12 ) {
+ /* Resample to 12 -> 8 khz */
+ SKP_int16 signal_12_FIX[ 12 * PE_MAX_FRAME_LENGTH_MS ];
+ SKP_float2short_array( signal_12_FIX, signal, frame_length );
+ SKP_memset( filt_state, 0, 6 * sizeof( SKP_int32 ) );
+ SKP_Silk_resampler_down2_3( filt_state, signal_8_FIX, signal_12_FIX, frame_length );
+ SKP_short2float_array( signal_8kHz, signal_8_FIX, frame_length_8kHz );
+ } else {
+ SKP_assert( Fs_kHz == 8 );
+ SKP_float2short_array( signal_8_FIX, signal, frame_length_8kHz );
+ }
+
+ /* Decimate again to 4 kHz */
+ SKP_memset( filt_state, 0, 2 * sizeof( SKP_int32 ) );
+ SKP_Silk_resampler_down2( filt_state, signal_4_FIX, signal_8_FIX, frame_length_8kHz );
+ SKP_short2float_array( signal_4kHz, signal_4_FIX, frame_length_4kHz );
+
+ /* Low-pass filter */
+ for( i = frame_length_4kHz - 1; i > 0; i-- ) {
+ signal_4kHz[ i ] += signal_4kHz[ i - 1 ];
+ }
+
+ /******************************************************************************
+ * FIRST STAGE, operating in 4 khz
+ ******************************************************************************/
+ target_ptr = &signal_4kHz[ SKP_LSHIFT( sf_length_4kHz, 2 ) ];
+ for( k = 0; k < nb_subfr >> 1; k++ ) {
+ /* Check that we are within range of the array */
+ SKP_assert( target_ptr >= signal_4kHz );
+ SKP_assert( target_ptr + sf_length_8kHz <= signal_4kHz + frame_length_4kHz );
+
+ basis_ptr = target_ptr - min_lag_4kHz;
+
+ /* Check that we are within range of the array */
+ SKP_assert( basis_ptr >= signal_4kHz );
+ SKP_assert( basis_ptr + sf_length_8kHz <= signal_4kHz + frame_length_4kHz );
+
+ /* Calculate first vector products before loop */
+ cross_corr = SKP_Silk_inner_product_FLP( target_ptr, basis_ptr, sf_length_8kHz );
+ normalizer = SKP_Silk_energy_FLP( basis_ptr, sf_length_8kHz ) + sf_length_8kHz * 4000.0f;
+
+ C[ 0 ][ min_lag_4kHz ] += (SKP_float)(cross_corr / sqrt(normalizer));
+
+ /* From now on normalizer is computed recursively */
+ for(d = min_lag_4kHz + 1; d <= max_lag_4kHz; d++) {
+ basis_ptr--;
+
+ /* Check that we are within range of the array */
+ SKP_assert( basis_ptr >= signal_4kHz );
+ SKP_assert( basis_ptr + sf_length_8kHz <= signal_4kHz + frame_length_4kHz );
+
+ cross_corr = SKP_Silk_inner_product_FLP(target_ptr, basis_ptr, sf_length_8kHz);
+
+ /* Add contribution of new sample and remove contribution from oldest sample */
+ normalizer +=
+ basis_ptr[ 0 ] * basis_ptr[ 0 ] -
+ basis_ptr[ sf_length_8kHz ] * basis_ptr[ sf_length_8kHz ];
+ C[ 0 ][ d ] += (SKP_float)(cross_corr / sqrt( normalizer ));
+ }
+ /* Update target pointer */
+ target_ptr += sf_length_8kHz;
+ }
+
+ /* Apply short-lag bias */
+ for( i = max_lag_4kHz; i >= min_lag_4kHz; i-- ) {
+ C[ 0 ][ i ] -= C[ 0 ][ i ] * i / 4096.0f;
+ }
+
+ /* Sort */
+ length_d_srch = 4 + 2 * complexity;
+ SKP_assert( 3 * length_d_srch <= PE_D_SRCH_LENGTH );
+ SKP_Silk_insertion_sort_decreasing_FLP( &C[ 0 ][ min_lag_4kHz ], d_srch, max_lag_4kHz - min_lag_4kHz + 1, length_d_srch );
+
+ /* Escape if correlation is very low already here */
+ Cmax = C[ 0 ][ min_lag_4kHz ];
+ target_ptr = &signal_4kHz[ SKP_SMULBB( sf_length_4kHz, nb_subfr ) ];
+ energy = 1000.0f;
+ for( i = 0; i < SKP_LSHIFT( sf_length_4kHz, 2 ); i++ ) {
+ energy += target_ptr[i] * target_ptr[i];
+ }
+ threshold = Cmax * Cmax;
+ if( energy / 16.0f > threshold ) {
+ SKP_memset( pitch_out, 0, nb_subfr * sizeof( SKP_int ) );
+ *LTPCorr = 0.0f;
+ *lagIndex = 0;
+ *contourIndex = 0;
+ return 1;
+ }
+
+ threshold = search_thres1 * Cmax;
+ for( i = 0; i < length_d_srch; i++ ) {
+ /* Convert to 8 kHz indices for the sorted correlation that exceeds the threshold */
+ if( C[ 0 ][ min_lag_4kHz + i ] > threshold ) {
+ d_srch[ i ] = SKP_LSHIFT( d_srch[ i ] + min_lag_4kHz, 1 );
+ } else {
+ length_d_srch = i;
+ break;
+ }
+ }
+ SKP_assert( length_d_srch > 0 );
+
+ for( i = min_lag_8kHz - 5; i < max_lag_8kHz + 5; i++ ) {
+ d_comp[ i ] = 0;
+ }
+ for( i = 0; i < length_d_srch; i++ ) {
+ d_comp[ d_srch[ i ] ] = 1;
+ }
+
+ /* Convolution */
+ for( i = max_lag_8kHz + 3; i >= min_lag_8kHz; i-- ) {
+ d_comp[ i ] += d_comp[ i - 1 ] + d_comp[ i - 2 ];
+ }
+
+ length_d_srch = 0;
+ for( i = min_lag_8kHz; i < max_lag_8kHz + 1; i++ ) {
+ if( d_comp[ i + 1 ] > 0 ) {
+ d_srch[ length_d_srch ] = i;
+ length_d_srch++;
+ }
+ }
+
+ /* Convolution */
+ for( i = max_lag_8kHz + 3; i >= min_lag_8kHz; i-- ) {
+ d_comp[ i ] += d_comp[ i - 1 ] + d_comp[ i - 2 ] + d_comp[ i - 3 ];
+ }
+
+ length_d_comp = 0;
+ for( i = min_lag_8kHz; i < max_lag_8kHz + 4; i++ ) {
+ if( d_comp[ i ] > 0 ) {
+ d_comp[ length_d_comp ] = i - 2;
+ length_d_comp++;
+ }
+ }
+
+ /**********************************************************************************
+ ** SECOND STAGE, operating at 8 kHz, on lag sections with high correlation
+ *************************************************************************************/
+ /*********************************************************************************
+ * Find energy of each subframe projected onto its history, for a range of delays
+ *********************************************************************************/
+ SKP_memset( C, 0, PE_MAX_NB_SUBFR*((PE_MAX_LAG >> 1) + 5) * sizeof(SKP_float)); // Is this needed?
+
+ if( Fs_kHz == 8 ) {
+ target_ptr = &signal[ PE_LTP_MEM_LENGTH_MS * 8 ];
+ } else {
+ target_ptr = &signal_8kHz[ PE_LTP_MEM_LENGTH_MS * 8 ];
+ }
+ for( k = 0; k < nb_subfr; k++ ) {
+ energy_tmp = SKP_Silk_energy_FLP( target_ptr, sf_length_8kHz );
+ for( j = 0; j < length_d_comp; j++ ) {
+ d = d_comp[ j ];
+ basis_ptr = target_ptr - d;
+ cross_corr = SKP_Silk_inner_product_FLP( basis_ptr, target_ptr, sf_length_8kHz );
+ energy = SKP_Silk_energy_FLP( basis_ptr, sf_length_8kHz );
+ if (cross_corr > 0.0f) {
+ C[ k ][ d ] = (SKP_float)(cross_corr * cross_corr / (energy * energy_tmp + eps));
+ } else {
+ C[ k ][ d ] = 0.0f;
+ }
+ }
+ target_ptr += sf_length_8kHz;
+ }
+
+ /* search over lag range and lags codebook */
+ /* scale factor for lag codebook, as a function of center lag */
+
+ CCmax = 0.0f; /* This value doesn't matter */
+ CCmax_b = -1000.0f;
+
+ CBimax = 0; /* To avoid returning undefined lag values */
+ lag = -1; /* To check if lag with strong enough correlation has been found */
+
+ if( prevLag > 0 ) {
+ if( Fs_kHz == 12 ) {
+ prevLag = SKP_LSHIFT( prevLag, 1 ) / 3;
+ } else if( Fs_kHz == 16 ) {
+ prevLag = SKP_RSHIFT( prevLag, 1 );
+ }
+ prevLag_log2 = SKP_P_log2((SKP_float)prevLag);
+ } else {
+ prevLag_log2 = 0;
+ }
+
+ /* Setup stage 2 codebook based on number of subframes */
+ if( nb_subfr == PE_MAX_NB_SUBFR ) {
+ cbk_size = PE_NB_CBKS_STAGE2_EXT;
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage2[ 0 ][ 0 ];
+ if( Fs_kHz == 8 && complexity > SigProc_PE_MIN_COMPLEX ) {
+ /* If input is 8 khz use a larger codebook here because it is last stage */
+ nb_cbk_search = PE_NB_CBKS_STAGE2_EXT;
+ } else {
+ nb_cbk_search = PE_NB_CBKS_STAGE2;
+ }
+ } else {
+ cbk_size = PE_NB_CBKS_STAGE2_10MS;
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage2_10_ms[ 0 ][ 0 ];
+ nb_cbk_search = PE_NB_CBKS_STAGE2_10MS;
+ }
+
+ for( k = 0; k < length_d_srch; k++ ) {
+ d = d_srch[ k ];
+ for( j = 0; j < nb_cbk_search; j++ ) {
+ CC[j] = 0.0f;
+ for( i = 0; i < nb_subfr; i++ ) {
+ /* Try all codebooks */
+ CC[ j ] += C[ i ][ d + matrix_ptr( Lag_CB_ptr, i, j, cbk_size )];
+ }
+ }
+ /* Find best codebook */
+ CCmax_new = -1000.0f;
+ CBimax_new = 0;
+ for( i = 0; i < nb_cbk_search; i++ ) {
+ if( CC[ i ] > CCmax_new ) {
+ CCmax_new = CC[ i ];
+ CBimax_new = i;
+ }
+ }
+ CCmax_new = SKP_max_float(CCmax_new, 0.0f); /* To avoid taking square root of negative number later */
+ CCmax_new_b = CCmax_new;
+
+ /* Bias towards shorter lags */
+ lag_log2 = SKP_P_log2((SKP_float)d);
+ CCmax_new_b -= PE_SHORTLAG_BIAS * nb_subfr * lag_log2;
+
+ /* Bias towards previous lag */
+ if ( prevLag > 0 ) {
+ delta_lag_log2_sqr = lag_log2 - prevLag_log2;
+ delta_lag_log2_sqr *= delta_lag_log2_sqr;
+ CCmax_new_b -= PE_PREVLAG_BIAS * nb_subfr * (*LTPCorr) * delta_lag_log2_sqr / (delta_lag_log2_sqr + 0.5f);
+ }
+
+ if ( CCmax_new_b > CCmax_b && /* Find maximum biased correlation */
+ CCmax_new > nb_subfr * search_thres2 * search_thres2 && /* Correlation needs to be high enough to be voiced */
+ SKP_Silk_CB_lags_stage2[ 0 ][ CBimax_new ] <= min_lag_8kHz /* Lag must be in range */
+ ) {
+ CCmax_b = CCmax_new_b;
+ CCmax = CCmax_new;
+ lag = d;
+ CBimax = CBimax_new;
+ }
+ }
+
+ if( lag == -1 ) {
+ /* No suitable candidate found */
+ SKP_memset( pitch_out, 0, PE_MAX_NB_SUBFR * sizeof(SKP_int) );
+ *LTPCorr = 0.0f;
+ *lagIndex = 0;
+ *contourIndex = 0;
+ return 1;
+ }
+
+ if( Fs_kHz > 8 ) {
+ /* Search in original signal */
+
+ /* Compensate for decimation */
+ SKP_assert( lag == SKP_SAT16( lag ) );
+ if( Fs_kHz == 12 ) {
+ lag = SKP_RSHIFT_ROUND( SKP_SMULBB( lag, 3 ), 1 );
+ } else if( Fs_kHz == 16 ) {
+ lag = SKP_LSHIFT( lag, 1 );
+ } else {
+ lag = SKP_SMULBB( lag, 3 );
+ }
+
+ lag = SKP_LIMIT_int( lag, min_lag, max_lag );
+ start_lag = SKP_max_int( lag - 2, min_lag );
+ end_lag = SKP_min_int( lag + 2, max_lag );
+ lag_new = lag; /* to avoid undefined lag */
+ CBimax = 0; /* to avoid undefined lag */
+ SKP_assert( CCmax >= 0.0f );
+ *LTPCorr = (SKP_float)sqrt( CCmax / nb_subfr ); /* Output normalized correlation */
+
+ CCmax = -1000.0f;
+
+ /* Calculate the correlations and energies needed in stage 3 */
+ SKP_P_Ana_calc_corr_st3( cross_corr_st3, signal, start_lag, sf_length, nb_subfr, complexity );
+ SKP_P_Ana_calc_energy_st3( energies_st3, signal, start_lag, sf_length, nb_subfr, complexity );
+
+ lag_counter = 0;
+ SKP_assert( lag == SKP_SAT16( lag ) );
+ contour_bias = PE_FLATCONTOUR_BIAS / lag;
+
+ /* Setup cbk parameters acording to complexity setting and frame length */
+ if( nb_subfr == PE_MAX_NB_SUBFR ) {
+ nb_cbk_search = (SKP_int)SKP_Silk_nb_cbk_searchs_stage3[ complexity ];
+ cbk_size = PE_NB_CBKS_STAGE3_MAX;
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage3[ 0 ][ 0 ];
+ } else {
+ nb_cbk_search = PE_NB_CBKS_STAGE3_10MS;
+ cbk_size = PE_NB_CBKS_STAGE3_10MS;
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage3_10_ms[ 0 ][ 0 ];
+ }
+
+ for( d = start_lag; d <= end_lag; d++ ) {
+ for( j = 0; j < nb_cbk_search; j++ ) {
+ cross_corr = 0.0;
+ energy = eps;
+ for( k = 0; k < nb_subfr; k++ ) {
+ energy += energies_st3[ k ][ j ][ lag_counter ];
+ cross_corr += cross_corr_st3[ k ][ j ][ lag_counter ];
+ }
+ if( cross_corr > 0.0 ) {
+ CCmax_new = (SKP_float)(cross_corr * cross_corr / energy);
+ /* Reduce depending on flatness of contour */
+ CCmax_new *= 1.0f - contour_bias * j;
+ } else {
+ CCmax_new = 0.0f;
+ }
+
+ if( CCmax_new > CCmax &&
+ ( d + (SKP_int)SKP_Silk_CB_lags_stage3[ 0 ][ j ] ) <= max_lag
+ ) {
+ CCmax = CCmax_new;
+ lag_new = d;
+ CBimax = j;
+ }
+ }
+ lag_counter++;
+ }
+
+ for( k = 0; k < nb_subfr; k++ ) {
+ pitch_out[ k ] = lag_new + matrix_ptr( Lag_CB_ptr, k, CBimax, cbk_size );
+ }
+ *lagIndex = (SKP_int16)( lag_new - min_lag );
+ *contourIndex = (SKP_int8)CBimax;
+ } else {
+ /* Save Lags and correlation */
+ SKP_assert( CCmax >= 0.0f );
+ *LTPCorr = (SKP_float)sqrt( CCmax / nb_subfr ); /* Output normalized correlation */
+ for( k = 0; k < nb_subfr; k++ ) {
+ pitch_out[ k ] = lag + matrix_ptr( Lag_CB_ptr, k, CBimax, cbk_size );
+ }
+ *lagIndex = (SKP_int16)( lag - min_lag );
+ *contourIndex = (SKP_int8)CBimax;
+ }
+ SKP_assert( *lagIndex >= 0 );
+ /* return as voiced */
+ return 0;
+}
+
+static void SKP_P_Ana_calc_corr_st3(
+ SKP_float cross_corr_st3[ PE_MAX_NB_SUBFR ][ PE_NB_CBKS_STAGE3_MAX ][ PE_NB_STAGE3_LAGS ], /* O 3 DIM correlation array */
+ const SKP_float signal[], /* I vector to correlate */
+ SKP_int start_lag, /* I start lag */
+ SKP_int sf_length, /* I sub frame length */
+ SKP_int nb_subfr, /* I number of subframes */
+ SKP_int complexity /* I Complexity setting */
+)
+ /***********************************************************************
+ Calculates the correlations used in stage 3 search. In order to cover
+ the whole lag codebook for all the searched offset lags (lag +- 2),
+ the following correlations are needed in each sub frame:
+
+ sf1: lag range [-8,...,7] total 16 correlations
+ sf2: lag range [-4,...,4] total 9 correlations
+ sf3: lag range [-3,....4] total 8 correltions
+ sf4: lag range [-6,....8] total 15 correlations
+
+ In total 48 correlations. The direct implementation computed in worst case
+ 4*12*5 = 240 correlations, but more likely around 120.
+ **********************************************************************/
+{
+ const SKP_float *target_ptr, *basis_ptr;
+ SKP_int i, j, k, lag_counter, lag_low, lag_high;
+ SKP_int nb_cbk_search, delta, idx, cbk_size;
+ SKP_float scratch_mem[ SCRATCH_SIZE ];
+ const SKP_int8 *Lag_range_ptr, *Lag_CB_ptr;
+
+ SKP_assert( complexity >= SigProc_PE_MIN_COMPLEX );
+ SKP_assert( complexity <= SigProc_PE_MAX_COMPLEX );
+
+ if( nb_subfr == PE_MAX_NB_SUBFR ){
+ Lag_range_ptr = &SKP_Silk_Lag_range_stage3[ complexity ][ 0 ][ 0 ];
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage3[ 0 ][ 0 ];
+ nb_cbk_search = SKP_Silk_nb_cbk_searchs_stage3[ complexity ];
+ cbk_size = PE_NB_CBKS_STAGE3_MAX;
+ } else {
+ SKP_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1);
+ Lag_range_ptr = &SKP_Silk_Lag_range_stage3_10_ms[ 0 ][ 0 ];
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage3_10_ms[ 0 ][ 0 ];
+ nb_cbk_search = PE_NB_CBKS_STAGE3_10MS;
+ cbk_size = PE_NB_CBKS_STAGE3_10MS;
+ }
+
+ target_ptr = &signal[ SKP_LSHIFT( sf_length, 2 ) ]; /* Pointer to middle of frame */
+ for( k = 0; k < nb_subfr; k++ ) {
+ lag_counter = 0;
+
+ /* Calculate the correlations for each subframe */
+ lag_low = matrix_ptr( Lag_range_ptr, k, 0, 2 );
+ lag_high = matrix_ptr( Lag_range_ptr, k, 1, 2 );
+ for( j = lag_low; j <= lag_high; j++ ) {
+ basis_ptr = target_ptr - ( start_lag + j );
+ SKP_assert( lag_counter < SCRATCH_SIZE );
+ scratch_mem[ lag_counter ] = (SKP_float)SKP_Silk_inner_product_FLP( target_ptr, basis_ptr, sf_length );
+ lag_counter++;
+ }
+
+ delta = matrix_ptr( Lag_range_ptr, k, 0, 2 );
+ for( i = 0; i < nb_cbk_search; i++ ) {
+ /* Fill out the 3 dim array that stores the correlations for */
+ /* each code_book vector for each start lag */
+ idx = matrix_ptr( Lag_CB_ptr, k, i, cbk_size ) - delta;
+ for( j = 0; j < PE_NB_STAGE3_LAGS; j++ ) {
+ SKP_assert( idx + j < SCRATCH_SIZE );
+ SKP_assert( idx + j < lag_counter );
+ cross_corr_st3[ k ][ i ][ j ] = scratch_mem[ idx + j ];
+ }
+ }
+ target_ptr += sf_length;
+ }
+}
+
+static void SKP_P_Ana_calc_energy_st3(
+ SKP_float energies_st3[ PE_MAX_NB_SUBFR ][ PE_NB_CBKS_STAGE3_MAX ][ PE_NB_STAGE3_LAGS ], /* O 3 DIM correlation array */
+ const SKP_float signal[], /* I vector to correlate */
+ SKP_int start_lag, /* I start lag */
+ SKP_int sf_length, /* I sub frame length */
+ SKP_int nb_subfr, /* I number of subframes */
+ SKP_int complexity /* I Complexity setting */
+)
+/****************************************************************
+Calculate the energies for first two subframes. The energies are
+calculated recursively.
+****************************************************************/
+{
+ const SKP_float *target_ptr, *basis_ptr;
+ double energy;
+ SKP_int k, i, j, lag_counter;
+ SKP_int nb_cbk_search, delta, idx, cbk_size, lag_diff;
+ SKP_float scratch_mem[ SCRATCH_SIZE ];
+ const SKP_int8 *Lag_range_ptr, *Lag_CB_ptr;
+
+ SKP_assert( complexity >= SigProc_PE_MIN_COMPLEX );
+ SKP_assert( complexity <= SigProc_PE_MAX_COMPLEX );
+
+ if( nb_subfr == PE_MAX_NB_SUBFR ){
+ Lag_range_ptr = &SKP_Silk_Lag_range_stage3[ complexity ][ 0 ][ 0 ];
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage3[ 0 ][ 0 ];
+ nb_cbk_search = SKP_Silk_nb_cbk_searchs_stage3[ complexity ];
+ cbk_size = PE_NB_CBKS_STAGE3_MAX;
+ } else {
+ SKP_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1);
+ Lag_range_ptr = &SKP_Silk_Lag_range_stage3_10_ms[ 0 ][ 0 ];
+ Lag_CB_ptr = &SKP_Silk_CB_lags_stage3_10_ms[ 0 ][ 0 ];
+ nb_cbk_search = PE_NB_CBKS_STAGE3_10MS;
+ cbk_size = PE_NB_CBKS_STAGE3_10MS;
+ }
+
+ target_ptr = &signal[ SKP_LSHIFT( sf_length, 2 ) ];
+ for( k = 0; k < nb_subfr; k++ ) {
+ lag_counter = 0;
+
+ /* Calculate the energy for first lag */
+ basis_ptr = target_ptr - ( start_lag + matrix_ptr( Lag_range_ptr, k, 0, 2 ) );
+ energy = SKP_Silk_energy_FLP( basis_ptr, sf_length ) + 1e-3;
+ SKP_assert( energy >= 0.0 );
+ scratch_mem[lag_counter] = (SKP_float)energy;
+ lag_counter++;
+
+ lag_diff = ( matrix_ptr( Lag_range_ptr, k, 1, 2 ) - matrix_ptr( Lag_range_ptr, k, 0, 2 ) + 1 );
+ for( i = 1; i < lag_diff; i++ ) {
+ /* remove part outside new window */
+ energy -= basis_ptr[sf_length - i] * basis_ptr[sf_length - i];
+ SKP_assert( energy >= 0.0 );
+
+ /* add part that comes into window */
+ energy += basis_ptr[ -i ] * basis_ptr[ -i ];
+ SKP_assert( energy >= 0.0 );
+ SKP_assert( lag_counter < SCRATCH_SIZE );
+ scratch_mem[lag_counter] = (SKP_float)energy;
+ lag_counter++;
+ }
+
+ delta = matrix_ptr( Lag_range_ptr, k, 0, 2 );
+ for( i = 0; i < nb_cbk_search; i++ ) {
+ /* Fill out the 3 dim array that stores the correlations for */
+ /* each code_book vector for each start lag */
+ idx = matrix_ptr( Lag_CB_ptr, k, i, cbk_size ) - delta;
+ for( j = 0; j < PE_NB_STAGE3_LAGS; j++ ) {
+ SKP_assert( idx + j < SCRATCH_SIZE );
+ SKP_assert( idx + j < lag_counter );
+ energies_st3[ k ][ i ][ j ] = scratch_mem[ idx + j ];
+ SKP_assert( energies_st3[ k ][ i ][ j ] >= 0.0f );
+ }
+ }
+ target_ptr += sf_length;
+ }
+}
--- /dev/null
+++ b/src_SigProc_FLP/SKP_Silk_scale_copy_vector_FLP.c
@@ -1,0 +1,53 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FLP.h"
+
+/* copy and multiply a vector by a constant */
+void SKP_Silk_scale_copy_vector_FLP(
+ SKP_float *data_out,
+ const SKP_float *data_in,
+ SKP_float gain,
+ SKP_int dataSize
+)
+{
+ SKP_int i, dataSize4;
+
+ /* 4x unrolled loop */
+ dataSize4 = dataSize & 0xFFFC;
+ for( i = 0; i < dataSize4; i += 4 ) {
+ data_out[ i + 0 ] = gain * data_in[ i + 0 ];
+ data_out[ i + 1 ] = gain * data_in[ i + 1 ];
+ data_out[ i + 2 ] = gain * data_in[ i + 2 ];
+ data_out[ i + 3 ] = gain * data_in[ i + 3 ];
+ }
+
+ /* any remaining elements */
+ for( ; i < dataSize; i++ ) {
+ data_out[ i ] = gain * data_in[ i ];
+ }
+}
--- /dev/null
+++ b/src_SigProc_FLP/SKP_Silk_scale_vector_FLP.c
@@ -1,0 +1,52 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_SigProc_FLP.h"
+
+/* multiply a vector by a constant */
+void SKP_Silk_scale_vector_FLP(
+ SKP_float *data1,
+ SKP_float gain,
+ SKP_int dataSize
+)
+{
+ SKP_int i, dataSize4;
+
+ /* 4x unrolled loop */
+ dataSize4 = dataSize & 0xFFFC;
+ for( i = 0; i < dataSize4; i += 4 ) {
+ data1[ i + 0 ] *= gain;
+ data1[ i + 1 ] *= gain;
+ data1[ i + 2 ] *= gain;
+ data1[ i + 3 ] *= gain;
+ }
+
+ /* any remaining elements */
+ for( ; i < dataSize; i++ ) {
+ data1[ i ] *= gain;
+ }
+}
--- /dev/null
+++ b/src_SigProc_FLP/SKP_Silk_schur_FLP.c
@@ -1,0 +1,73 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * SKP_Silk_schur.c *
+ * *
+ * Calculates the reflection coefficients from the correlation sequence *
+ * *
+ * Copyright 2008 (c), Skype Limited *
+ * Date: 080103 *
+ */
+
+#include "SKP_Silk_SigProc_FLP.h"
+
+SKP_float SKP_Silk_schur_FLP( /* O returns residual energy */
+ SKP_float refl_coef[], /* O reflection coefficients (length order) */
+ const SKP_float auto_corr[], /* I autotcorrelation sequence (length order+1) */
+ SKP_int order /* I order */
+)
+{
+ SKP_int k, n;
+ SKP_float C[ SKP_Silk_MAX_ORDER_LPC + 1 ][ 2 ];
+ SKP_float Ctmp1, Ctmp2, rc_tmp;
+
+ /* Copy correlations */
+ for( k = 0; k < order+1; k++ ) {
+ C[ k ][ 0 ] = C[ k ][ 1 ] = auto_corr[ k ];
+ }
+
+ for( k = 0; k < order; k++ ) {
+ /* Get reflection coefficient */
+ rc_tmp = -C[ k + 1 ][ 0 ] / SKP_max_float( C[ 0 ][ 1 ], 1e-9f );
+
+ /* Save the output */
+ refl_coef[ k ] = rc_tmp;
+
+ /* Update correlations */
+ for( n = 0; n < order - k; n++ ){
+ Ctmp1 = C[ n + k + 1 ][ 0 ];
+ Ctmp2 = C[ n ][ 1 ];
+ C[ n + k + 1 ][ 0 ] = Ctmp1 + Ctmp2 * rc_tmp;
+ C[ n ][ 1 ] = Ctmp2 + Ctmp1 * rc_tmp;
+ }
+ }
+
+ /* Return residual energy */
+ return C[ 0 ][ 1 ];
+}
+
--- /dev/null
+++ b/src_SigProc_FLP/SKP_Silk_sort_FLP.c
@@ -1,0 +1,79 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* Insertion sort (fast for already almost sorted arrays): */
+/* Best case: O(n) for an already sorted array */
+/* Worst case: O(n^2) for an inversely sorted array */
+
+#include "SKP_Silk_typedef.h"
+#include "SKP_Silk_SigProc_FLP.h"
+
+void SKP_Silk_insertion_sort_decreasing_FLP(
+ SKP_float *a, /* I/O: Unsorted / Sorted vector */
+ SKP_int *index, /* O: Index vector for the sorted elements */
+ const SKP_int L, /* I: Vector length */
+ const SKP_int K /* I: Number of correctly sorted positions */
+)
+{
+ SKP_float value;
+ SKP_int i, j;
+
+ /* Safety checks */
+ SKP_assert( K > 0 );
+ SKP_assert( L > 0 );
+ SKP_assert( L >= K );
+
+ /* Write start indices in index vector */
+ for( i = 0; i < K; i++ ) {
+ index[ i ] = i;
+ }
+
+ /* Sort vector elements by value, decreasing order */
+ for( i = 1; i < K; i++ ) {
+ value = a[ i ];
+ for( j = i - 1; ( j >= 0 ) && ( value > a[ j ] ); j-- ) {
+ a[ j + 1 ] = a[ j ]; /* Shift value */
+ index[ j + 1 ] = index[ j ]; /* Shift index */
+ }
+ a[ j + 1 ] = value; /* Write value */
+ index[ j + 1 ] = i; /* Write index */
+ }
+
+ /* If less than L values are asked check the remaining values, */
+ /* but only spend CPU to ensure that the K first values are correct */
+ for( i = K; i < L; i++ ) {
+ value = a[ i ];
+ if( value > a[ K - 1 ] ) {
+ for( j = K - 2; ( j >= 0 ) && ( value > a[ j ] ); j-- ) {
+ a[ j + 1 ] = a[ j ]; /* Shift value */
+ index[ j + 1 ] = index[ j ]; /* Shift index */
+ }
+ a[ j + 1 ] = value; /* Write value */
+ index[ j + 1 ] = i; /* Write index */
+ }
+ }
+}
--- /dev/null
+++ b/src_SigProc_FLP/src_SigProc_FLP.vcxproj
@@ -1,0 +1,97 @@
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+ <Link>
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@@ -1,0 +1,66 @@
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--- /dev/null
+++ b/src_common/SKP_Silk_CNG.c
@@ -1,0 +1,149 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/* Generates excitation for CNG LPC synthesis */
+SKP_INLINE void SKP_Silk_CNG_exc(
+ SKP_int16 residual[], /* O CNG residual signal Q0 */
+ SKP_int32 exc_buf_Q10[], /* I Random samples buffer Q10 */
+ SKP_int32 Gain_Q16, /* I Gain to apply */
+ SKP_int length, /* I Length */
+ SKP_int32 *rand_seed /* I/O Seed to random index generator */
+)
+{
+ SKP_int32 seed;
+ SKP_int i, idx, exc_mask;
+
+ exc_mask = CNG_BUF_MASK_MAX;
+ while( exc_mask > length ) {
+ exc_mask = SKP_RSHIFT( exc_mask, 1 );
+ }
+
+ seed = *rand_seed;
+ for( i = 0; i < length; i++ ) {
+ seed = SKP_RAND( seed );
+ idx = ( SKP_int )( SKP_RSHIFT( seed, 24 ) & exc_mask );
+ SKP_assert( idx >= 0 );
+ SKP_assert( idx <= CNG_BUF_MASK_MAX );
+ residual[ i ] = ( SKP_int16 )SKP_SAT16( SKP_RSHIFT_ROUND( SKP_SMULWW( exc_buf_Q10[ idx ], Gain_Q16 ), 10 ) );
+ }
+ *rand_seed = seed;
+}
+
+void SKP_Silk_CNG_Reset(
+ SKP_Silk_decoder_state *psDec /* I/O Decoder state */
+)
+{
+ SKP_int i, NLSF_step_Q15, NLSF_acc_Q15;
+
+ NLSF_step_Q15 = SKP_DIV32_16( SKP_int16_MAX, psDec->LPC_order + 1 );
+ NLSF_acc_Q15 = 0;
+ for( i = 0; i < psDec->LPC_order; i++ ) {
+ NLSF_acc_Q15 += NLSF_step_Q15;
+ psDec->sCNG.CNG_smth_NLSF_Q15[ i ] = NLSF_acc_Q15;
+ }
+ psDec->sCNG.CNG_smth_Gain_Q16 = 0;
+ psDec->sCNG.rand_seed = 3176576;
+}
+
+/* Updates CNG estimate, and applies the CNG when packet was lost */
+void SKP_Silk_CNG(
+ SKP_Silk_decoder_state *psDec, /* I/O Decoder state */
+ SKP_Silk_decoder_control *psDecCtrl, /* I/O Decoder control */
+ SKP_int16 signal[], /* I/O Signal */
+ SKP_int length /* I Length of residual */
+)
+{
+ SKP_int i, subfr;
+ SKP_int32 tmp_32, Gain_Q26, max_Gain_Q16;
+ SKP_int16 LPC_buf[ MAX_LPC_ORDER ];
+ SKP_int16 CNG_sig[ MAX_FRAME_LENGTH ];
+ SKP_Silk_CNG_struct *psCNG;
+ psCNG = &psDec->sCNG;
+
+ if( psDec->fs_kHz != psCNG->fs_kHz ) {
+ /* Reset state */
+ SKP_Silk_CNG_Reset( psDec );
+
+ psCNG->fs_kHz = psDec->fs_kHz;
+ }
+ if( psDec->lossCnt == 0 && psDec->prevSignalType == TYPE_NO_VOICE_ACTIVITY ) {
+ /* Update CNG parameters */
+
+ /* Smoothing of LSF's */
+ for( i = 0; i < psDec->LPC_order; i++ ) {
+ psCNG->CNG_smth_NLSF_Q15[ i ] += SKP_SMULWB( psDec->prevNLSF_Q15[ i ] - psCNG->CNG_smth_NLSF_Q15[ i ], CNG_NLSF_SMTH_Q16 );
+ }
+ /* Find the subframe with the highest gain */
+ max_Gain_Q16 = 0;
+ subfr = 0;
+ for( i = 0; i < psDec->nb_subfr; i++ ) {
+ if( psDecCtrl->Gains_Q16[ i ] > max_Gain_Q16 ) {
+ max_Gain_Q16 = psDecCtrl->Gains_Q16[ i ];
+ subfr = i;
+ }
+ }
+ /* Update CNG excitation buffer with excitation from this subframe */
+ SKP_memmove( &psCNG->CNG_exc_buf_Q10[ psDec->subfr_length ], psCNG->CNG_exc_buf_Q10, ( psDec->nb_subfr - 1 ) * psDec->subfr_length * sizeof( SKP_int32 ) );
+ SKP_memcpy( psCNG->CNG_exc_buf_Q10, &psDec->exc_Q10[ subfr * psDec->subfr_length ], psDec->subfr_length * sizeof( SKP_int32 ) );
+
+ /* Smooth gains */
+ for( i = 0; i < psDec->nb_subfr; i++ ) {
+ psCNG->CNG_smth_Gain_Q16 += SKP_SMULWB( psDecCtrl->Gains_Q16[ i ] - psCNG->CNG_smth_Gain_Q16, CNG_GAIN_SMTH_Q16 );
+ }
+ }
+
+ /* Add CNG when packet is lost and / or when low speech activity */
+ if( psDec->lossCnt ) {
+
+ /* Generate CNG excitation */
+ SKP_Silk_CNG_exc( CNG_sig, psCNG->CNG_exc_buf_Q10,
+ psCNG->CNG_smth_Gain_Q16, length, &psCNG->rand_seed );
+
+ /* Convert CNG NLSF to filter representation */
+ SKP_Silk_NLSF2A_stable( LPC_buf, psCNG->CNG_smth_NLSF_Q15, psDec->LPC_order );
+
+ Gain_Q26 = ( SKP_int32 )1 << 26; /* 1.0 */
+
+ /* Generate CNG signal, by synthesis filtering */
+ if( psDec->LPC_order == 16 ) {
+ SKP_Silk_LPC_synthesis_order16( CNG_sig, LPC_buf,
+ Gain_Q26, psCNG->CNG_synth_state, CNG_sig, length );
+ } else {
+ SKP_Silk_LPC_synthesis_filter( CNG_sig, LPC_buf,
+ Gain_Q26, psCNG->CNG_synth_state, CNG_sig, length, psDec->LPC_order );
+ }
+ /* Mix with signal */
+ for( i = 0; i < length; i++ ) {
+ tmp_32 = signal[ i ] + CNG_sig[ i ];
+ signal[ i ] = SKP_SAT16( tmp_32 );
+ }
+ } else {
+ SKP_memset( psCNG->CNG_synth_state, 0, psDec->LPC_order * sizeof( SKP_int32 ) );
+ }
+}
--- /dev/null
+++ b/src_common/SKP_Silk_HP_variable_cutoff.c
@@ -1,0 +1,117 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main_FIX.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+#define SKP_RADIANS_CONSTANT_Q19 1482 // 0.45f * 2.0f * 3.14159265359 / 1000
+#define SKP_LOG2_VARIABLE_HP_MIN_FREQ_Q7 809 // log(80) in Q7
+
+/* High-pass filter with cutoff frequency adaptation based on pitch lag statistics */
+void SKP_Silk_HP_variable_cutoff(
+ SKP_Silk_encoder_state *psEncC, /* I/O Encoder state */
+ SKP_int16 *out, /* O high-pass filtered output signal */
+ const SKP_int16 *in, /* I input signal */
+ const SKP_int frame_length /* I length of input */
+)
+{
+ SKP_int quality_Q15;
+ SKP_float pitch_freq_low_Hz;
+ SKP_int32 B_Q28[ 3 ], A_Q28[ 2 ];
+ SKP_int32 Fc_Q19, r_Q28, r_Q22;
+ SKP_int32 pitch_freq_Hz_Q16, pitch_freq_log_Q7, delta_freq_Q7;
+
+ /*********************************************/
+ /* Estimate Low End of Pitch Frequency Range */
+ /*********************************************/
+ if( psEncC->prevSignalType == TYPE_VOICED ) {
+ /* difference, in log domain */
+ pitch_freq_Hz_Q16 = SKP_DIV32_16( SKP_LSHIFT( SKP_MUL( psEncC->fs_kHz, 1000 ), 16 ), psEncC->prevLag );
+ pitch_freq_log_Q7 = SKP_Silk_lin2log( pitch_freq_Hz_Q16 ) - ( 16 << 7 ); //0x70
+
+ /* adjustment based on quality */
+ quality_Q15 = psEncC->input_quality_bands_Q15[ 0 ];
+ pitch_freq_log_Q7 = SKP_SUB32( pitch_freq_log_Q7, SKP_SMULWB( SKP_SMULWB( SKP_LSHIFT( quality_Q15, 2 ), quality_Q15 ),
+ pitch_freq_log_Q7 - SKP_LOG2_VARIABLE_HP_MIN_FREQ_Q7 ) );
+ pitch_freq_log_Q7 = SKP_ADD32( pitch_freq_log_Q7, SKP_RSHIFT( SKP_FIX_CONST( 0.6, 15 ) - quality_Q15, 9 ) );
+
+ //delta_freq = pitch_freq_log - psEnc->variable_HP_smth1;
+ delta_freq_Q7 = pitch_freq_log_Q7 - SKP_RSHIFT( psEncC->variable_HP_smth1_Q15, 8 );
+ if( delta_freq_Q7 < 0 ) {
+ /* less smoothing for decreasing pitch frequency, to track something close to the minimum */
+ delta_freq_Q7 = SKP_MUL( delta_freq_Q7, 3 );
+ }
+
+ /* limit delta, to reduce impact of outliers */
+ delta_freq_Q7 = SKP_LIMIT_32( delta_freq_Q7, -SKP_FIX_CONST( VARIABLE_HP_MAX_DELTA_FREQ, 7 ), SKP_FIX_CONST( VARIABLE_HP_MAX_DELTA_FREQ, 7 ) );
+
+ /* update smoother */
+ psEncC->variable_HP_smth1_Q15 = SKP_SMLAWB( psEncC->variable_HP_smth1_Q15,
+ SKP_MUL( SKP_LSHIFT( psEncC->speech_activity_Q8, 1 ), delta_freq_Q7 ), SKP_FIX_CONST( VARIABLE_HP_SMTH_COEF1, 16 ) );
+ }
+
+ /* second smoother */
+ psEncC->variable_HP_smth2_Q15 = SKP_SMLAWB( psEncC->variable_HP_smth2_Q15,
+ psEncC->variable_HP_smth1_Q15 - psEncC->variable_HP_smth2_Q15, SKP_FIX_CONST( VARIABLE_HP_SMTH_COEF2, 16 ) );
+
+ /* convert from log scale to Hertz */
+ pitch_freq_low_Hz = SKP_Silk_log2lin( SKP_RSHIFT( psEncC->variable_HP_smth2_Q15, 8 ) );
+
+ /* limit frequency range */
+ pitch_freq_low_Hz = SKP_LIMIT_32( pitch_freq_low_Hz, SKP_FIX_CONST( VARIABLE_HP_MIN_FREQ, 0 ), SKP_FIX_CONST( VARIABLE_HP_MAX_FREQ, 0 ) );
+
+ /********************************/
+ /* Compute Filter Coefficients */
+ /********************************/
+ /* compute cut-off frequency, in radians */
+ //Fc_num = (SKP_float)( 0.45f * 2.0f * 3.14159265359 * pitch_freq_low_Hz );
+ //Fc_denom = (SKP_float)( 1e3f * psEncC->fs_kHz );
+ SKP_assert( pitch_freq_low_Hz <= SKP_int32_MAX / SKP_RADIANS_CONSTANT_Q19 );
+ Fc_Q19 = SKP_DIV32_16( SKP_SMULBB( SKP_RADIANS_CONSTANT_Q19, pitch_freq_low_Hz ), psEncC->fs_kHz ); // range: 3704 - 27787, 11-15 bits
+ SKP_assert( Fc_Q19 >= 3704 );
+ SKP_assert( Fc_Q19 <= 27787 );
+
+ r_Q28 = SKP_FIX_CONST( 1.0, 28 ) - SKP_MUL( SKP_FIX_CONST( 0.92, 9 ), Fc_Q19 );
+ SKP_assert( r_Q28 >= 255347779 );
+ SKP_assert( r_Q28 <= 266690872 );
+
+ /* b = r * [ 1; -2; 1 ]; */
+ /* a = [ 1; -2 * r * ( 1 - 0.5 * Fc^2 ); r^2 ]; */
+ B_Q28[ 0 ] = r_Q28;
+ B_Q28[ 1 ] = SKP_LSHIFT( -r_Q28, 1 );
+ B_Q28[ 2 ] = r_Q28;
+
+ // -r * ( 2 - Fc * Fc );
+ r_Q22 = SKP_RSHIFT( r_Q28, 6 );
+ A_Q28[ 0 ] = SKP_SMULWW( r_Q22, SKP_SMULWW( Fc_Q19, Fc_Q19 ) - SKP_FIX_CONST( 2.0, 22 ) );
+ A_Q28[ 1 ] = SKP_SMULWW( r_Q22, r_Q22 );
+
+ /********************************/
+ /* High-Pass Filter */
+ /********************************/
+ SKP_Silk_biquad_alt( in, B_Q28, A_Q28, psEncC->In_HP_State, out, frame_length );
+}
--- /dev/null
+++ b/src_common/SKP_Silk_LP_variable_cutoff.c
@@ -1,0 +1,133 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/*
+
+ Elliptic/Cauer filters designed with 0.1 dB passband ripple,
+ 80 dB minimum stopband attenuation, and
+ [0.95 : 0.15 : 0.35] normalized cut off frequencies.
+
+*/
+#include "SKP_Silk_main.h"
+
+/* Helper function, interpolates the filter taps */
+SKP_INLINE void SKP_Silk_LP_interpolate_filter_taps(
+ SKP_int32 B_Q28[ TRANSITION_NB ],
+ SKP_int32 A_Q28[ TRANSITION_NA ],
+ const SKP_int ind,
+ const SKP_int32 fac_Q16
+)
+{
+ SKP_int nb, na;
+
+ if( ind < TRANSITION_INT_NUM - 1 ) {
+ if( fac_Q16 > 0 ) {
+ if( fac_Q16 < 32768 ) { /* fac_Q16 is in range of a 16-bit int */
+ /* Piece-wise linear interpolation of B and A */
+ for( nb = 0; nb < TRANSITION_NB; nb++ ) {
+ B_Q28[ nb ] = SKP_SMLAWB(
+ SKP_Silk_Transition_LP_B_Q28[ ind ][ nb ],
+ SKP_Silk_Transition_LP_B_Q28[ ind + 1 ][ nb ] -
+ SKP_Silk_Transition_LP_B_Q28[ ind ][ nb ],
+ fac_Q16 );
+ }
+ for( na = 0; na < TRANSITION_NA; na++ ) {
+ A_Q28[ na ] = SKP_SMLAWB(
+ SKP_Silk_Transition_LP_A_Q28[ ind ][ na ],
+ SKP_Silk_Transition_LP_A_Q28[ ind + 1 ][ na ] -
+ SKP_Silk_Transition_LP_A_Q28[ ind ][ na ],
+ fac_Q16 );
+ }
+ } else { /* ( fac_Q16 - ( 1 << 16 ) ) is in range of a 16-bit int */
+
+ SKP_assert( fac_Q16 - ( 1 << 16 ) == SKP_SAT16( fac_Q16 - ( 1 << 16 ) ) );
+ /* Piece-wise linear interpolation of B and A */
+ for( nb = 0; nb < TRANSITION_NB; nb++ ) {
+ B_Q28[ nb ] = SKP_SMLAWB(
+ SKP_Silk_Transition_LP_B_Q28[ ind + 1 ][ nb ],
+ SKP_Silk_Transition_LP_B_Q28[ ind + 1 ][ nb ] -
+ SKP_Silk_Transition_LP_B_Q28[ ind ][ nb ],
+ fac_Q16 - ( 1 << 16 ) );
+ }
+ for( na = 0; na < TRANSITION_NA; na++ ) {
+ A_Q28[ na ] = SKP_SMLAWB(
+ SKP_Silk_Transition_LP_A_Q28[ ind + 1 ][ na ],
+ SKP_Silk_Transition_LP_A_Q28[ ind + 1 ][ na ] -
+ SKP_Silk_Transition_LP_A_Q28[ ind ][ na ],
+ fac_Q16 - ( 1 << 16 ) );
+ }
+ }
+ } else {
+ SKP_memcpy( B_Q28, SKP_Silk_Transition_LP_B_Q28[ ind ], TRANSITION_NB * sizeof( SKP_int32 ) );
+ SKP_memcpy( A_Q28, SKP_Silk_Transition_LP_A_Q28[ ind ], TRANSITION_NA * sizeof( SKP_int32 ) );
+ }
+ } else {
+ SKP_memcpy( B_Q28, SKP_Silk_Transition_LP_B_Q28[ TRANSITION_INT_NUM - 1 ], TRANSITION_NB * sizeof( SKP_int32 ) );
+ SKP_memcpy( A_Q28, SKP_Silk_Transition_LP_A_Q28[ TRANSITION_INT_NUM - 1 ], TRANSITION_NA * sizeof( SKP_int32 ) );
+ }
+}
+
+/* Low-pass filter with variable cutoff frequency based on */
+/* piece-wise linear interpolation between elliptic filters */
+/* Start by setting psEncC->mode <> 0; */
+/* Deactivate by setting psEncC->mode = 0; */
+void SKP_Silk_LP_variable_cutoff(
+ SKP_Silk_LP_state *psLP, /* I/O LP filter state */
+ SKP_int16 *signal, /* I/O Low-pass filtered output signal */
+ const SKP_int frame_length /* I Frame length */
+)
+{
+ SKP_int32 B_Q28[ TRANSITION_NB ], A_Q28[ TRANSITION_NA ], fac_Q16 = 0;
+ SKP_int ind = 0;
+
+ SKP_assert( psLP->transition_frame_no >= 0 && psLP->transition_frame_no <= TRANSITION_FRAMES );
+
+ /* Interpolate filter coefficients if needed */
+ if( psLP->mode != 0 ) {
+ /* Calculate index and interpolation factor for interpolation */
+#if( TRANSITION_INT_STEPS == 64 )
+ fac_Q16 = SKP_LSHIFT( TRANSITION_FRAMES - psLP->transition_frame_no, 16 - 6 );
+#else
+ fac_Q16 = SKP_DIV32_16( SKP_LSHIFT( TRANSITION_FRAMES - psLP->transition_frame_no, 16 ), TRANSITION_FRAMES );
+#endif
+ ind = SKP_RSHIFT( fac_Q16, 16 );
+ fac_Q16 -= SKP_LSHIFT( ind, 16 );
+
+ SKP_assert( ind >= 0 );
+ SKP_assert( ind < TRANSITION_INT_NUM );
+
+ /* Interpolate filter coefficients */
+ SKP_Silk_LP_interpolate_filter_taps( B_Q28, A_Q28, ind, fac_Q16 );
+
+ /* Update transition frame number for next frame */
+ psLP->transition_frame_no = SKP_LIMIT( psLP->transition_frame_no + psLP->mode, 0, TRANSITION_FRAMES );
+
+ /* ARMA low-pass filtering */
+ SKP_assert( TRANSITION_NB == 3 && TRANSITION_NA == 2 );
+ SKP_Silk_biquad_alt( signal, B_Q28, A_Q28, psLP->In_LP_State, signal, frame_length );
+ }
+}
--- /dev/null
+++ b/src_common/SKP_Silk_NLSF2A_stable.c
@@ -1,0 +1,57 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/* Convert NLSF parameters to stable AR prediction filter coefficients */
+void SKP_Silk_NLSF2A_stable(
+ SKP_int16 pAR_Q12[ MAX_LPC_ORDER ], /* O Stabilized AR coefs [LPC_order] */
+ const SKP_int16 pNLSF[ MAX_LPC_ORDER ], /* I NLSF vector [LPC_order] */
+ const SKP_int LPC_order /* I LPC/LSF order */
+)
+{
+ SKP_int i;
+ SKP_int32 invGain_Q30;
+
+ SKP_Silk_NLSF2A( pAR_Q12, pNLSF, LPC_order );
+
+ /* Ensure stable LPCs */
+ for( i = 0; i < MAX_LPC_STABILIZE_ITERATIONS; i++ ) {
+ if( SKP_Silk_LPC_inverse_pred_gain( &invGain_Q30, pAR_Q12, LPC_order ) == 1 ) {
+ SKP_Silk_bwexpander( pAR_Q12, LPC_order, 65536 - SKP_SMULBB( 10 + i, i ) ); /* 10_Q16 = 0.00015 */
+ } else {
+ break;
+ }
+ }
+
+ /* Reached the last iteration */
+ if( i == MAX_LPC_STABILIZE_ITERATIONS ) {
+ for( i = 0; i < LPC_order; i++ ) {
+ pAR_Q12[ i ] = 0;
+ }
+ }
+}
--- /dev/null
+++ b/src_common/SKP_Silk_NLSF_VQ.c
@@ -1,0 +1,64 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/* Compute quantization errors for an LPC_order element input vector for a VQ codebook */
+void SKP_Silk_NLSF_VQ(
+ SKP_int32 err_Q26[], /* O Quantization errors [K] */
+ const SKP_int16 in_Q15[], /* I Input vectors to be quantized [LPC_order] */
+ const SKP_uint8 pCB_Q8[], /* I Codebook vectors [K*LPC_order] */
+ const SKP_int K, /* I Number of codebook vectors */
+ const SKP_int LPC_order /* I Number of LPCs */
+)
+{
+ SKP_int i, m;
+ SKP_int32 diff_Q15, sum_error_Q30, sum_error_Q26;
+
+ SKP_assert( LPC_order <= 16 );
+ SKP_assert( ( LPC_order & 1 ) == 0 );
+
+ /* Loop over codebook */
+ for( i = 0; i < K; i++ ) {
+ sum_error_Q26 = 0;
+ for( m = 0; m < LPC_order; m += 2 ) {
+ /* Compute weighted squared quantization error for index m */
+ diff_Q15 = SKP_SUB_LSHIFT32( in_Q15[ m ], ( SKP_int32 )*pCB_Q8++, 7 ); // range: [ -32767 : 32767 ]
+ sum_error_Q30 = SKP_SMULBB( diff_Q15, diff_Q15 );
+
+ /* Compute weighted squared quantization error for index m + 1 */
+ diff_Q15 = SKP_SUB_LSHIFT32( in_Q15[m + 1], ( SKP_int32 )*pCB_Q8++, 7 ); // range: [ -32767 : 32767 ]
+ sum_error_Q30 = SKP_SMLABB( sum_error_Q30, diff_Q15, diff_Q15 );
+
+ sum_error_Q26 = SKP_ADD_RSHIFT32( sum_error_Q26, sum_error_Q30, 4 );
+
+ SKP_assert( sum_error_Q26 >= 0 );
+ SKP_assert( sum_error_Q30 >= 0 );
+ }
+ err_Q26[ i ] = sum_error_Q26;
+ }
+}
--- /dev/null
+++ b/src_common/SKP_Silk_NLSF_decode.c
@@ -1,0 +1,96 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/* Predictive dequantizer for NLSF residuals */
+void SKP_Silk_NLSF_residual_dequant( /* O Returns RD value in Q30 */
+ SKP_int16 x_Q10[], /* O Output [ order ] */
+ const SKP_int8 indices[], /* I Quantization indices [ order ] */
+ const SKP_uint8 pred_coef_Q8[], /* I Backward predictor coefs [ order ] */
+ const SKP_int quant_step_size_Q16, /* I Quantization step size */
+ const SKP_int16 order /* I Number of input values */
+)
+{
+ SKP_int i, out_Q10, pred_Q10;
+
+ out_Q10 = 0;
+ for( i = order-1; i >= 0; i-- ) {
+ pred_Q10 = SKP_RSHIFT( SKP_SMULBB( out_Q10, (SKP_int16)pred_coef_Q8[ i ] ), 8 );
+ out_Q10 = SKP_LSHIFT( indices[ i ], 10 );
+ if( out_Q10 > 0 ) {
+ out_Q10 = SKP_SUB16( out_Q10, SKP_FIX_CONST( NLSF_QUANT_LEVEL_ADJ, 10 ) );
+ } else if( out_Q10 < 0 ) {
+ out_Q10 = SKP_ADD16( out_Q10, SKP_FIX_CONST( NLSF_QUANT_LEVEL_ADJ, 10 ) );
+ }
+ out_Q10 = SKP_SMLAWB( pred_Q10, out_Q10, quant_step_size_Q16 );
+ x_Q10[ i ] = out_Q10;
+ }
+}
+
+
+/***********************/
+/* NLSF vector decoder */
+/***********************/
+void SKP_Silk_NLSF_decode(
+ SKP_int16 *pNLSF_Q15, /* O Quantized NLSF vector [ LPC_ORDER ] */
+ SKP_int8 *NLSFIndices, /* I Codebook path vector [ LPC_ORDER + 1 ] */
+ const SKP_Silk_NLSF_CB_struct *psNLSF_CB /* I Codebook object */
+)
+{
+ SKP_int i;
+ SKP_uint8 pred_Q8[ MAX_LPC_ORDER ];
+ SKP_int16 ec_ix[ MAX_LPC_ORDER ];
+ SKP_int16 res_Q10[ MAX_LPC_ORDER ];
+ SKP_int16 W_tmp_Q5[ MAX_LPC_ORDER ];
+ SKP_int32 W_tmp_Q9;
+ const SKP_uint8 *pCB_element;
+
+ /* Decode first stage */
+ pCB_element = &psNLSF_CB->CB1_NLSF_Q8[ NLSFIndices[ 0 ] * psNLSF_CB->order ];
+ for( i = 0; i < psNLSF_CB->order; i++ ) {
+ pNLSF_Q15[ i ] = SKP_LSHIFT( ( SKP_int16 )pCB_element[ i ], 7 );
+ }
+
+ /* Unpack entropy table indices and predictor for current CB1 index */
+ SKP_Silk_NLSF_unpack( ec_ix, pred_Q8, psNLSF_CB, NLSFIndices[ 0 ] );
+
+ /* Trellis dequantizer */
+ SKP_Silk_NLSF_residual_dequant( res_Q10, &NLSFIndices[ 1 ], pred_Q8, psNLSF_CB->quantStepSize_Q16, psNLSF_CB->order );
+
+ /* Weights from codebook vector */
+ SKP_Silk_NLSF_VQ_weights_laroia( W_tmp_Q5, pNLSF_Q15, psNLSF_CB->order );
+
+ /* Apply inverse square-rooted weights and add to output */
+ for( i = 0; i < psNLSF_CB->order; i++ ) {
+ W_tmp_Q9 = SKP_Silk_SQRT_APPROX( SKP_LSHIFT( ( SKP_int32 )W_tmp_Q5[ i ], 13 ) );
+ pNLSF_Q15[ i ] = SKP_ADD16( pNLSF_Q15[ i ], (SKP_int16)SKP_DIV32_16( SKP_LSHIFT( ( SKP_int32 )res_Q10[ i ], 14 ), W_tmp_Q9 ) );
+ }
+
+ /* NLSF stabilization */
+ SKP_Silk_NLSF_stabilize( pNLSF_Q15, psNLSF_CB->deltaMin_Q15, psNLSF_CB->order );
+}
--- /dev/null
+++ b/src_common/SKP_Silk_NLSF_del_dec_quant.c
@@ -1,0 +1,201 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/* Delayed-decision quantizer for NLSF residuals */
+SKP_int32 SKP_Silk_NLSF_del_dec_quant( /* O Returns RD value in Q25 */
+ SKP_int8 indices[], /* O Quantization indices [ order ] */
+ const SKP_int16 x_Q10[], /* I Input [ order ] */
+ const SKP_int16 w_Q5[], /* I Weights [ order ] */
+ const SKP_uint8 pred_coef_Q8[], /* I Backward predictor coefs [ order ] */
+ const SKP_int16 ec_ix[], /* I Indices to entropy coding tables [ order ] */
+ const SKP_uint8 ec_rates_Q5[], /* I Rates [] */
+ const SKP_int quant_step_size_Q16, /* I Quantization step size */
+ const SKP_int16 inv_quant_step_size_Q6, /* I Inverse quantization step size */
+ const SKP_int32 mu_Q20, /* I R/D tradeoff */
+ const SKP_int16 order /* I Number of input values */
+)
+{
+ SKP_int i, j, nStates, ind_tmp, ind_min_max, ind_max_min, in_Q10, res_Q10;
+ SKP_int pred_Q10, diff_Q10, out0_Q10, out1_Q10, rate0_Q5, rate1_Q5;
+ SKP_int32 RD_tmp_Q25, min_Q25, min_max_Q25, max_min_Q25, pred_coef_Q16;
+ SKP_int ind_sort[ NLSF_QUANT_DEL_DEC_STATES ];
+ SKP_int8 ind[ NLSF_QUANT_DEL_DEC_STATES ][ MAX_LPC_ORDER ];
+ SKP_int16 prev_out_Q10[ 2 * NLSF_QUANT_DEL_DEC_STATES ];
+ SKP_int32 RD_Q25[ 2 * NLSF_QUANT_DEL_DEC_STATES ];
+ SKP_int32 RD_min_Q25[ NLSF_QUANT_DEL_DEC_STATES ];
+ SKP_int32 RD_max_Q25[ NLSF_QUANT_DEL_DEC_STATES ];
+ const SKP_uint8 *rates_Q5;
+
+ SKP_assert( (NLSF_QUANT_DEL_DEC_STATES & (NLSF_QUANT_DEL_DEC_STATES-1)) == 0 ); /* must be power of two */
+
+ nStates = 1;
+ RD_Q25[ 0 ] = 0;
+ prev_out_Q10[ 0 ] = 0;
+ for( i = order - 1; ; i-- ) {
+ rates_Q5 = &ec_rates_Q5[ ec_ix[ i ] ];
+ pred_coef_Q16 = SKP_LSHIFT( (SKP_int32)pred_coef_Q8[ i ], 8 );
+ in_Q10 = x_Q10[ i ];
+ for( j = 0; j < nStates; j++ ) {
+ pred_Q10 = SKP_SMULWB( pred_coef_Q16, prev_out_Q10[ j ] );
+ res_Q10 = SKP_SUB16( in_Q10, pred_Q10 );
+ ind_tmp = SKP_SMULWB( inv_quant_step_size_Q6, res_Q10 );
+ ind_tmp = SKP_LIMIT( ind_tmp, -NLSF_QUANT_MAX_AMPLITUDE_EXT, NLSF_QUANT_MAX_AMPLITUDE_EXT-1 );
+ ind[ j ][ i ] = (SKP_int8)ind_tmp;
+
+ /* compute outputs for ind_tmp and ind_tmp + 1 */
+ out0_Q10 = SKP_LSHIFT( ind_tmp, 10 );
+ out1_Q10 = SKP_ADD16( out0_Q10, 1024 );
+ if( ind_tmp > 0 ) {
+ out0_Q10 = SKP_SUB16( out0_Q10, SKP_FIX_CONST( NLSF_QUANT_LEVEL_ADJ, 10 ) );
+ out1_Q10 = SKP_SUB16( out1_Q10, SKP_FIX_CONST( NLSF_QUANT_LEVEL_ADJ, 10 ) );
+ } else if( ind_tmp == 0 ) {
+ out1_Q10 = SKP_SUB16( out1_Q10, SKP_FIX_CONST( NLSF_QUANT_LEVEL_ADJ, 10 ) );
+ } else if( ind_tmp == -1 ) {
+ out0_Q10 = SKP_ADD16( out0_Q10, SKP_FIX_CONST( NLSF_QUANT_LEVEL_ADJ, 10 ) );
+ } else {
+ out0_Q10 = SKP_ADD16( out0_Q10, SKP_FIX_CONST( NLSF_QUANT_LEVEL_ADJ, 10 ) );
+ out1_Q10 = SKP_ADD16( out1_Q10, SKP_FIX_CONST( NLSF_QUANT_LEVEL_ADJ, 10 ) );
+ }
+ out0_Q10 = SKP_SMULWB( out0_Q10, quant_step_size_Q16 );
+ out1_Q10 = SKP_SMULWB( out1_Q10, quant_step_size_Q16 );
+ out0_Q10 = SKP_ADD16( out0_Q10, pred_Q10 );
+ out1_Q10 = SKP_ADD16( out1_Q10, pred_Q10 );
+ prev_out_Q10[ j ] = out0_Q10;
+ prev_out_Q10[ j + nStates ] = out1_Q10;
+
+ /* compute RD for ind_tmp and ind_tmp + 1 */
+ if( ind_tmp + 1 >= NLSF_QUANT_MAX_AMPLITUDE ) {
+ if( ind_tmp + 1 == NLSF_QUANT_MAX_AMPLITUDE ) {
+ rate0_Q5 = rates_Q5[ ind_tmp + NLSF_QUANT_MAX_AMPLITUDE ];
+ rate1_Q5 = 280;
+ } else {
+ rate0_Q5 = SKP_SMLABB( 280 - 43 * NLSF_QUANT_MAX_AMPLITUDE, 43, ind_tmp );
+ rate1_Q5 = SKP_ADD16( rate0_Q5, 43 );
+ }
+ } else if( ind_tmp <= -NLSF_QUANT_MAX_AMPLITUDE ) {
+ if( ind_tmp == -NLSF_QUANT_MAX_AMPLITUDE ) {
+ rate0_Q5 = 280;
+ rate1_Q5 = rates_Q5[ ind_tmp + 1 + NLSF_QUANT_MAX_AMPLITUDE ];
+ } else {
+ rate0_Q5 = SKP_SMLABB( 280 - 43 * NLSF_QUANT_MAX_AMPLITUDE, -43, ind_tmp );
+ rate1_Q5 = SKP_SUB16( rate0_Q5, 43 );
+ }
+ } else {
+ rate0_Q5 = rates_Q5[ ind_tmp + NLSF_QUANT_MAX_AMPLITUDE ];
+ rate1_Q5 = rates_Q5[ ind_tmp + 1 + NLSF_QUANT_MAX_AMPLITUDE ];
+ }
+ RD_tmp_Q25 = RD_Q25[ j ];
+ diff_Q10 = SKP_SUB16( in_Q10, out0_Q10 );
+ RD_Q25[ j ] = SKP_SMLABB( SKP_MLA( RD_tmp_Q25, SKP_SMULBB( diff_Q10, diff_Q10 ), w_Q5[ i ] ), mu_Q20, rate0_Q5 );
+ diff_Q10 = SKP_SUB16( in_Q10, out1_Q10 );
+ RD_Q25[ j + nStates ] = SKP_SMLABB( SKP_MLA( RD_tmp_Q25, SKP_SMULBB( diff_Q10, diff_Q10 ), w_Q5[ i ] ), mu_Q20, rate1_Q5 );
+ }
+
+ if( nStates < NLSF_QUANT_DEL_DEC_STATES ) {
+ /* double number of states and copy */
+ for( j = 0; j < nStates; j++ ) {
+ ind[ j + nStates ][ i ] = ind[ j ][ i ] + 1;
+ }
+ nStates = SKP_LSHIFT( nStates, 1 );
+ for( j = nStates; j < NLSF_QUANT_DEL_DEC_STATES; j++ ) {
+ ind[ j ][ i ] = ind[ j - nStates ][ i ];
+ }
+ } else if( i > 0 ) {
+ /* sort lower and upper half of RD_Q25, pairwise */
+ for( j = 0; j < NLSF_QUANT_DEL_DEC_STATES; j++ ) {
+ if( RD_Q25[ j ] > RD_Q25[ j + NLSF_QUANT_DEL_DEC_STATES ] ) {
+ RD_max_Q25[ j ] = RD_Q25[ j ];
+ RD_min_Q25[ j ] = RD_Q25[ j + NLSF_QUANT_DEL_DEC_STATES ];
+ RD_Q25[ j ] = RD_min_Q25[ j ];
+ RD_Q25[ j + NLSF_QUANT_DEL_DEC_STATES ] = RD_max_Q25[ j ];
+ /* swap prev_out values */
+ out0_Q10 = prev_out_Q10[ j ];
+ prev_out_Q10[ j ] = prev_out_Q10[ j + NLSF_QUANT_DEL_DEC_STATES ];
+ prev_out_Q10[ j + NLSF_QUANT_DEL_DEC_STATES ] = out0_Q10;
+ ind_sort[ j ] = j + NLSF_QUANT_DEL_DEC_STATES;
+ } else {
+ RD_min_Q25[ j ] = RD_Q25[ j ];
+ RD_max_Q25[ j ] = RD_Q25[ j + NLSF_QUANT_DEL_DEC_STATES ];
+ ind_sort[ j ] = j;
+ }
+ }
+ /* compare the highest RD values of the winning half with the lowest one in the losing half, and copy if necessary */
+ /* afterwards ind_sort[] will contain the indices of the NLSF_QUANT_DEL_DEC_STATES winning RD values */
+ while( 1 ) {
+ min_max_Q25 = SKP_int32_MAX;
+ max_min_Q25 = 0;
+ ind_min_max = 0;
+ ind_max_min = 0;
+ for( j = 0; j < NLSF_QUANT_DEL_DEC_STATES; j++ ) {
+ if( min_max_Q25 > RD_max_Q25[ j ] ) {
+ min_max_Q25 = RD_max_Q25[ j ];
+ ind_min_max = j;
+ }
+ if( max_min_Q25 < RD_min_Q25[ j ] ) {
+ max_min_Q25 = RD_min_Q25[ j ];
+ ind_max_min = j;
+ }
+ }
+ if( min_max_Q25 >= max_min_Q25 ) {
+ break;
+ }
+ /* copy ind_min_max to ind_max_min */
+ ind_sort[ ind_max_min ] = ind_sort[ ind_min_max ] ^ NLSF_QUANT_DEL_DEC_STATES;
+ RD_Q25[ ind_max_min ] = RD_Q25[ ind_min_max + NLSF_QUANT_DEL_DEC_STATES ];
+ prev_out_Q10[ ind_max_min ] = prev_out_Q10[ ind_min_max + NLSF_QUANT_DEL_DEC_STATES ];
+ RD_min_Q25[ ind_max_min ] = 0;
+ RD_max_Q25[ ind_min_max ] = SKP_int32_MAX;
+ SKP_memcpy( ind[ ind_max_min ], ind[ ind_min_max ], MAX_LPC_ORDER * sizeof( SKP_int8 ) );
+ }
+ /* increment index if it comes from the upper half */
+ for( j = 0; j < NLSF_QUANT_DEL_DEC_STATES; j++ ) {
+ ind[ j ][ i ] += SKP_RSHIFT( ind_sort[ j ], NLSF_QUANT_DEL_DEC_STATES_LOG2 );
+ }
+ } else { /* i == 0 */
+ /* last sample: find winner, copy indices and return RD value */
+ ind_tmp = 0;
+ min_Q25 = SKP_int32_MAX;
+ for( j = 0; j < 2 * NLSF_QUANT_DEL_DEC_STATES; j++ ) {
+ if( min_Q25 > RD_Q25[ j ] ) {
+ min_Q25 = RD_Q25[ j ];
+ ind_tmp = j;
+ }
+ }
+ for( j = 0; j < order; j++ ) {
+ indices[ j ] = ind[ ind_tmp & ( NLSF_QUANT_DEL_DEC_STATES - 1 ) ][ j ];
+ SKP_assert( indices[ j ] >= -NLSF_QUANT_MAX_AMPLITUDE_EXT );
+ SKP_assert( indices[ j ] <= NLSF_QUANT_MAX_AMPLITUDE_EXT );
+ }
+ indices[ 0 ] += SKP_RSHIFT( ind_tmp, NLSF_QUANT_DEL_DEC_STATES_LOG2 );
+ SKP_assert( indices[ 0 ] <= NLSF_QUANT_MAX_AMPLITUDE_EXT );
+ SKP_assert( min_Q25 >= 0 );
+ return min_Q25;
+ }
+ }
+}
--- /dev/null
+++ b/src_common/SKP_Silk_NLSF_encode.c
@@ -1,0 +1,183 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+#define STORE_LSF_DATA_FOR_TRAINING 0
+
+/***********************/
+/* NLSF vector encoder */
+/***********************/
+SKP_int32 SKP_Silk_NLSF_encode( /* O Returns RD value in Q25 */
+ SKP_int8 *NLSFIndices, /* I Codebook path vector [ LPC_ORDER + 1 ] */
+ SKP_int16 *pNLSF_Q15, /* I/O Quantized NLSF vector [ LPC_ORDER ] */
+ const SKP_Silk_NLSF_CB_struct *psNLSF_CB, /* I Codebook object */
+ const SKP_int16 *pW_Q5, /* I NLSF weight vector [ LPC_ORDER ] */
+ const SKP_int NLSF_mu_Q20, /* I Rate weight for the RD optimization */
+ const SKP_int nSurvivors, /* I Max survivors after first stage */
+ const SKP_int signalType /* I Signal type: 0/1/2 */
+)
+{
+ SKP_int i, s, ind1, bestIndex, prob_Q8, bits_q7;
+ SKP_int32 W_tmp_Q9;
+ SKP_int32 err_Q26[ NLSF_VQ_MAX_VECTORS ];
+ SKP_int32 RD_Q25[ NLSF_VQ_MAX_SURVIVORS ];
+ SKP_int tempIndices1[ NLSF_VQ_MAX_SURVIVORS ];
+ SKP_int8 tempIndices2[ NLSF_VQ_MAX_SURVIVORS * MAX_LPC_ORDER ];
+ SKP_int16 res_Q15[ MAX_LPC_ORDER ];
+ SKP_int16 res_Q10[ MAX_LPC_ORDER ];
+ SKP_int16 NLSF_tmp_Q15[ MAX_LPC_ORDER ];
+ SKP_int16 W_tmp_Q5[ MAX_LPC_ORDER ];
+ SKP_int16 W_adj_Q5[ MAX_LPC_ORDER ];
+ SKP_uint8 pred_Q8[ MAX_LPC_ORDER ];
+ SKP_int16 ec_ix[ MAX_LPC_ORDER ];
+ const SKP_uint8 *pCB_element, *iCDF_ptr;
+
+#if STORE_LSF_DATA_FOR_TRAINING
+ SKP_int16 pNLSF_Q15_orig[MAX_LPC_ORDER ];
+ DEBUG_STORE_DATA( NLSF.dat, pNLSF_Q15, psNLSF_CB->order * sizeof( SKP_int16 ) );
+ DEBUG_STORE_DATA( WNLSF.dat, pW_Q5, psNLSF_CB->order * sizeof( SKP_int16 ) );
+ DEBUG_STORE_DATA( NLSF_mu.dat, &NLSF_mu_Q20, sizeof( SKP_int ) );
+ DEBUG_STORE_DATA( sigType.dat, &signalType, sizeof( SKP_int ) );
+ SKP_memcpy(pNLSF_Q15_orig, pNLSF_Q15, sizeof( pNLSF_Q15_orig ));
+#endif
+
+ SKP_assert( nSurvivors <= NLSF_VQ_MAX_SURVIVORS );
+ SKP_assert( signalType >= 0 && signalType <= 2 );
+ SKP_assert( NLSF_mu_Q20 <= 32767 && NLSF_mu_Q20 >= 0 );
+
+ /* NLSF stabilization */
+ SKP_Silk_NLSF_stabilize( pNLSF_Q15, psNLSF_CB->deltaMin_Q15, psNLSF_CB->order );
+
+ /* First stage: VQ */
+ SKP_Silk_NLSF_VQ( err_Q26, pNLSF_Q15, psNLSF_CB->CB1_NLSF_Q8, psNLSF_CB->nVectors, psNLSF_CB->order );
+
+ /* Sort the quantization errors */
+ SKP_Silk_insertion_sort_increasing( err_Q26, tempIndices1, psNLSF_CB->nVectors, nSurvivors );
+
+ /* Loop over survivors */
+ for( s = 0; s < nSurvivors; s++ ) {
+ ind1 = tempIndices1[ s ];
+
+ /* Residual after first stage */
+ pCB_element = &psNLSF_CB->CB1_NLSF_Q8[ ind1 * psNLSF_CB->order ];
+ for( i = 0; i < psNLSF_CB->order; i++ ) {
+ NLSF_tmp_Q15[ i ] = SKP_LSHIFT16( ( SKP_int16 )pCB_element[ i ], 7 );
+ res_Q15[ i ] = pNLSF_Q15[ i ] - NLSF_tmp_Q15[ i ];
+ }
+
+ /* Weights from codebook vector */
+ SKP_Silk_NLSF_VQ_weights_laroia( W_tmp_Q5, NLSF_tmp_Q15, psNLSF_CB->order );
+
+ /* Apply square-rooted weights */
+ for( i = 0; i < psNLSF_CB->order; i++ ) {
+ W_tmp_Q9 = SKP_Silk_SQRT_APPROX( SKP_LSHIFT( ( SKP_int32 )W_tmp_Q5[ i ], 13 ) );
+ res_Q10[ i ] = ( SKP_int16 )SKP_RSHIFT( SKP_SMULBB( res_Q15[ i ], W_tmp_Q9 ), 14 );
+ }
+
+ /* Modify input weights accordingly */
+ for( i = 0; i < psNLSF_CB->order; i++ ) {
+ W_adj_Q5[ i ] = SKP_DIV32_16( SKP_LSHIFT( ( SKP_int32 )pW_Q5[ i ], 5 ), W_tmp_Q5[ i ] );
+ }
+
+ /* Unpack entropy table indices and predictor for current CB1 index */
+ SKP_Silk_NLSF_unpack( ec_ix, pred_Q8, psNLSF_CB, ind1 );
+
+ /* Trellis quantizer */
+ RD_Q25[ s ] = SKP_Silk_NLSF_del_dec_quant( &tempIndices2[ s * MAX_LPC_ORDER ], res_Q10, W_adj_Q5, pred_Q8, ec_ix,
+ psNLSF_CB->ec_Rates_Q5, psNLSF_CB->quantStepSize_Q16, psNLSF_CB->invQuantStepSize_Q6, NLSF_mu_Q20, psNLSF_CB->order );
+
+ /* Add rate for first stage */
+ iCDF_ptr = &psNLSF_CB->CB1_iCDF[ ( signalType >> 1 ) * psNLSF_CB->nVectors ];
+ if( ind1 == 0 ) {
+ prob_Q8 = 256 - iCDF_ptr[ ind1 ];
+ } else {
+ prob_Q8 = iCDF_ptr[ ind1 - 1 ] - iCDF_ptr[ ind1 ];
+ }
+ bits_q7 = ( 8 << 7 ) - SKP_Silk_lin2log( prob_Q8 );
+ RD_Q25[ s ] = SKP_SMLABB( RD_Q25[ s ], bits_q7, SKP_RSHIFT( NLSF_mu_Q20, 2 ) );
+ }
+
+ /* Find the lowest rate-distortion error */
+ SKP_Silk_insertion_sort_increasing( RD_Q25, &bestIndex, nSurvivors, 1 );
+
+ NLSFIndices[ 0 ] = ( SKP_int8 )tempIndices1[ bestIndex ];
+ SKP_memcpy( &NLSFIndices[ 1 ], &tempIndices2[ bestIndex * MAX_LPC_ORDER ], psNLSF_CB->order * sizeof( SKP_int8 ) );
+
+ /* Decode */
+ SKP_Silk_NLSF_decode( pNLSF_Q15, NLSFIndices, psNLSF_CB );
+
+#if STORE_LSF_DATA_FOR_TRAINING
+ {
+ /* code for training the codebooks */
+ SKP_int32 RD_dec_Q22, Dist_Q22_dec, Rate_Q7, diff_Q15;
+ ind1 = NLSFIndices[ 0 ];
+ SKP_Silk_NLSF_unpack( ec_ix, pred_Q8, psNLSF_CB, ind1 );
+
+ pCB_element = &psNLSF_CB->CB1_NLSF_Q8[ ind1 * psNLSF_CB->order ];
+ for( i = 0; i < psNLSF_CB->order; i++ ) {
+ NLSF_tmp_Q15[ i ] = SKP_LSHIFT16( ( SKP_int16 )pCB_element[ i ], 7 );
+ }
+ SKP_Silk_NLSF_VQ_weights_laroia( W_tmp_Q5, NLSF_tmp_Q15, psNLSF_CB->order );
+ for( i = 0; i < psNLSF_CB->order; i++ ) {
+ W_tmp_Q9 = SKP_Silk_SQRT_APPROX( SKP_LSHIFT( ( SKP_int32 )W_tmp_Q5[ i ], 13 ) );
+ res_Q15[ i ] = pNLSF_Q15_orig[ i ] - NLSF_tmp_Q15[ i ];
+ res_Q10[ i ] = (SKP_int16)SKP_RSHIFT( SKP_SMULBB( res_Q15[ i ], W_tmp_Q9 ), 14 );
+ DEBUG_STORE_DATA( NLSF_res_q10.dat, &res_Q10[ i ], sizeof( SKP_int16 ) );
+ res_Q15[ i ] = pNLSF_Q15[ i ] - NLSF_tmp_Q15[ i ];
+ res_Q10[ i ] = (SKP_int16)SKP_RSHIFT( SKP_SMULBB( res_Q15[ i ], W_tmp_Q9 ), 14 );
+ DEBUG_STORE_DATA( NLSF_resq_q10.dat, &res_Q10[ i ], sizeof( SKP_int16 ) );
+ }
+
+ Dist_Q22_dec = 0;
+ for( i = 0; i < psNLSF_CB->order; i++ ) {
+ diff_Q15 = pNLSF_Q15_orig[ i ] - pNLSF_Q15[ i ];
+ Dist_Q22_dec += ( ( (diff_Q15 >> 5) * (diff_Q15 >> 5) ) * pW_Q5[ i ] ) >> 3;
+ }
+ iCDF_ptr = &psNLSF_CB->CB1_iCDF[ ( signalType >> 1 ) * psNLSF_CB->nVectors ];
+ if( ind1 == 0 ) {
+ prob_Q8 = 256 - iCDF_ptr[ ind1 ];
+ } else {
+ prob_Q8 = iCDF_ptr[ ind1 - 1 ] - iCDF_ptr[ ind1 ];
+ }
+ Rate_Q7 = ( 8 << 7 ) - SKP_Silk_lin2log( prob_Q8 );
+ for( i = 0; i < psNLSF_CB->order; i++ ) {
+ Rate_Q7 += ((int)psNLSF_CB->ec_Rates_Q5[ ec_ix[ i ] + SKP_LIMIT( NLSFIndices[ i + 1 ] + NLSF_QUANT_MAX_AMPLITUDE, 0, 2 * NLSF_QUANT_MAX_AMPLITUDE ) ] ) << 2;
+ if( SKP_abs( NLSFIndices[ i + 1 ] ) >= NLSF_QUANT_MAX_AMPLITUDE ) {
+ Rate_Q7 += 128 << ( SKP_abs( NLSFIndices[ i + 1 ] ) - NLSF_QUANT_MAX_AMPLITUDE );
+ }
+ }
+ RD_dec_Q22 = Dist_Q22_dec + Rate_Q7 * NLSF_mu_Q20 >> 5;
+ DEBUG_STORE_DATA( dec_dist_q22.dat, &Dist_Q22_dec, sizeof( SKP_int32 ) );
+ DEBUG_STORE_DATA( dec_rate_q7.dat, &Rate_Q7, sizeof( SKP_int32 ) );
+ DEBUG_STORE_DATA( dec_rd_q22.dat, &RD_dec_Q22, sizeof( SKP_int32 ) );
+ }
+ DEBUG_STORE_DATA( NLSF_ind.dat, NLSFIndices, (psNLSF_CB->order+1) * sizeof( SKP_int8 ) );
+#endif
+
+ return RD_Q25[ 0 ];
+}
--- /dev/null
+++ b/src_common/SKP_Silk_NLSF_unpack.c
@@ -1,0 +1,51 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/* Unpack predictor values and indices for entropy coding tables */
+void SKP_Silk_NLSF_unpack(
+ SKP_int16 ec_ix[], /* O Indices to entropy tales [ LPC_ORDER ] */
+ SKP_uint8 pred_Q8[], /* O LSF predictor [ LPC_ORDER ] */
+ const SKP_Silk_NLSF_CB_struct *psNLSF_CB, /* I Codebook object */
+ const SKP_int CB1_index /* I Index of vector in first LSF codebook */
+)
+{
+ SKP_int i;
+ SKP_uint8 entry;
+ const SKP_uint8 *ec_sel_ptr;
+
+ ec_sel_ptr = &psNLSF_CB->ec_sel[ CB1_index * psNLSF_CB->order / 2 ];
+ for( i = 0; i < psNLSF_CB->order; i += 2 ) {
+ entry = *ec_sel_ptr++;
+ ec_ix [ i ] = SKP_SMULBB( SKP_RSHIFT( entry, 1 ) & 7, 2 * NLSF_QUANT_MAX_AMPLITUDE + 1 );
+ pred_Q8[ i ] = psNLSF_CB->pred_Q8[ i + ( entry & 1 ) * ( psNLSF_CB->order - 1 ) ];
+ ec_ix [ i + 1 ] = SKP_SMULBB( SKP_RSHIFT( entry, 5 ) & 7, 2 * NLSF_QUANT_MAX_AMPLITUDE + 1 );
+ pred_Q8[ i + 1 ] = psNLSF_CB->pred_Q8[ i + ( SKP_RSHIFT( entry, 4 ) & 1 ) * ( psNLSF_CB->order - 1 ) + 1 ];
+ }
+}
+
--- /dev/null
+++ b/src_common/SKP_Silk_NSQ.c
@@ -1,0 +1,427 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+SKP_INLINE void SKP_Silk_nsq_scale_states(
+ const SKP_Silk_encoder_state *psEncC, /* I Encoder State */
+ SKP_Silk_nsq_state *NSQ, /* I/O NSQ state */
+ const SKP_int16 x[], /* I input in Q0 */
+ SKP_int32 x_sc_Q10[], /* O input scaled with 1/Gain */
+ const SKP_int16 sLTP[], /* I re-whitened LTP state in Q0 */
+ SKP_int32 sLTP_Q16[], /* O LTP state matching scaled input */
+ SKP_int subfr, /* I subframe number */
+ const SKP_int LTP_scale_Q14, /* I */
+ const SKP_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I */
+ const SKP_int pitchL[ MAX_NB_SUBFR ] /* I */
+);
+
+SKP_INLINE void SKP_Silk_noise_shape_quantizer(
+ SKP_Silk_nsq_state *NSQ, /* I/O NSQ state */
+ SKP_int signalType, /* I Signal type */
+ const SKP_int32 x_sc_Q10[], /* I */
+ SKP_int8 pulses[], /* O */
+ SKP_int16 xq[], /* O */
+ SKP_int32 sLTP_Q16[], /* I/O LTP state */
+ const SKP_int16 a_Q12[], /* I Short term prediction coefs */
+ const SKP_int16 b_Q14[], /* I Long term prediction coefs */
+ const SKP_int16 AR_shp_Q13[], /* I Noise shaping AR coefs */
+ SKP_int lag, /* I Pitch lag */
+ SKP_int32 HarmShapeFIRPacked_Q14, /* I */
+ SKP_int Tilt_Q14, /* I Spectral tilt */
+ SKP_int32 LF_shp_Q14, /* I */
+ SKP_int32 Gain_Q16, /* I */
+ SKP_int Lambda_Q10, /* I */
+ SKP_int offset_Q10, /* I */
+ SKP_int length, /* I Input length */
+ SKP_int shapingLPCOrder, /* I Noise shaping AR filter order */
+ SKP_int predictLPCOrder /* I Prediction filter order */
+);
+
+void SKP_Silk_NSQ(
+ const SKP_Silk_encoder_state *psEncC, /* I/O Encoder State */
+ SKP_Silk_nsq_state *NSQ, /* I/O NSQ state */
+ SideInfoIndices *psIndices, /* I/O Quantization Indices */
+ const SKP_int16 x[], /* I prefiltered input signal */
+ SKP_int8 pulses[], /* O quantized qulse signal */
+ const SKP_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I Short term prediction coefficients */
+ const SKP_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I Long term prediction coefficients */
+ const SKP_int16 AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I */
+ const SKP_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I */
+ const SKP_int Tilt_Q14[ MAX_NB_SUBFR ], /* I Spectral tilt */
+ const SKP_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I */
+ const SKP_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I */
+ const SKP_int pitchL[ MAX_NB_SUBFR ], /* I */
+ const SKP_int Lambda_Q10, /* I */
+ const SKP_int LTP_scale_Q14 /* I LTP state scaling */
+)
+{
+ SKP_int k, lag, start_idx, LSF_interpolation_flag;
+ const SKP_int16 *A_Q12, *B_Q14, *AR_shp_Q13;
+ SKP_int16 *pxq;
+ SKP_int32 sLTP_Q16[ 2 * MAX_FRAME_LENGTH ];
+ SKP_int16 sLTP[ 2 * MAX_FRAME_LENGTH ];
+ SKP_int32 HarmShapeFIRPacked_Q14;
+ SKP_int offset_Q10;
+ SKP_int32 x_sc_Q10[ MAX_FRAME_LENGTH / MAX_NB_SUBFR ];
+
+ NSQ->rand_seed = psIndices->Seed;
+
+ /* Set unvoiced lag to the previous one, overwrite later for voiced */
+ lag = NSQ->lagPrev;
+
+ SKP_assert( NSQ->prev_inv_gain_Q16 != 0 );
+
+ offset_Q10 = SKP_Silk_Quantization_Offsets_Q10[ psIndices->signalType >> 1 ][ psIndices->quantOffsetType ];
+
+ if( psIndices->NLSFInterpCoef_Q2 == 4 ) {
+ LSF_interpolation_flag = 0;
+ } else {
+ LSF_interpolation_flag = 1;
+ }
+
+ /* Setup pointers to start of sub frame */
+ NSQ->sLTP_shp_buf_idx = psEncC->ltp_mem_length;
+ NSQ->sLTP_buf_idx = psEncC->ltp_mem_length;
+ pxq = &NSQ->xq[ psEncC->ltp_mem_length ];
+ for( k = 0; k < psEncC->nb_subfr; k++ ) {
+ A_Q12 = &PredCoef_Q12[ (( k >> 1 ) | ( 1 - LSF_interpolation_flag )) * MAX_LPC_ORDER ];
+ B_Q14 = <PCoef_Q14[ k * LTP_ORDER ];
+ AR_shp_Q13 = &AR2_Q13[ k * MAX_SHAPE_LPC_ORDER ];
+
+ /* Noise shape parameters */
+ SKP_assert( HarmShapeGain_Q14[ k ] >= 0 );
+ HarmShapeFIRPacked_Q14 = SKP_RSHIFT( HarmShapeGain_Q14[ k ], 2 );
+ HarmShapeFIRPacked_Q14 |= SKP_LSHIFT( ( SKP_int32 )SKP_RSHIFT( HarmShapeGain_Q14[ k ], 1 ), 16 );
+
+ NSQ->rewhite_flag = 0;
+ if( psIndices->signalType == TYPE_VOICED ) {
+ /* Voiced */
+ lag = pitchL[ k ];
+
+ /* Re-whitening */
+ if( ( k & ( 3 - SKP_LSHIFT( LSF_interpolation_flag, 1 ) ) ) == 0 ) {
+ /* Rewhiten with new A coefs */
+ start_idx = psEncC->ltp_mem_length - lag - psEncC->predictLPCOrder - LTP_ORDER / 2;
+ SKP_assert( start_idx > 0 );
+
+ SKP_Silk_LPC_analysis_filter( &sLTP[ start_idx ], &NSQ->xq[ start_idx + k * psEncC->subfr_length ],
+ A_Q12, psEncC->ltp_mem_length - start_idx, psEncC->predictLPCOrder );
+
+ NSQ->rewhite_flag = 1;
+ NSQ->sLTP_buf_idx = psEncC->ltp_mem_length;
+ }
+ }
+
+ SKP_Silk_nsq_scale_states( psEncC, NSQ, x, x_sc_Q10, sLTP, sLTP_Q16, k, LTP_scale_Q14, Gains_Q16, pitchL );
+
+ SKP_Silk_noise_shape_quantizer( NSQ, psIndices->signalType, x_sc_Q10, pulses, pxq, sLTP_Q16, A_Q12, B_Q14,
+ AR_shp_Q13, lag, HarmShapeFIRPacked_Q14, Tilt_Q14[ k ], LF_shp_Q14[ k ], Gains_Q16[ k ], Lambda_Q10,
+ offset_Q10, psEncC->subfr_length, psEncC->shapingLPCOrder, psEncC->predictLPCOrder );
+
+ x += psEncC->subfr_length;
+ pulses += psEncC->subfr_length;
+ pxq += psEncC->subfr_length;
+ }
+
+ /* Update lagPrev for next frame */
+ NSQ->lagPrev = pitchL[ psEncC->nb_subfr - 1 ];
+
+ /* Save quantized speech and noise shaping signals */
+ SKP_memmove( NSQ->xq, &NSQ->xq[ psEncC->frame_length ], psEncC->ltp_mem_length * sizeof( SKP_int16 ) );
+ SKP_memmove( NSQ->sLTP_shp_Q10, &NSQ->sLTP_shp_Q10[ psEncC->frame_length ], psEncC->ltp_mem_length * sizeof( SKP_int32 ) );
+
+#ifdef SAVE_ALL_INTERNAL_DATA
+ DEBUG_STORE_DATA( xq.dat, &pxq[ -psEncC->frame_length ], psEncC->frame_length * sizeof( SKP_int16 ) );
+ DEBUG_STORE_DATA( q.dat, &pulses[ -psEncC->frame_length ], psEncC->frame_length * sizeof( SKP_int8 ) );
+ DEBUG_STORE_DATA( sLTP_Q16.dat, &sLTP_Q16[ psEncC->ltp_mem_length ], psEncC->frame_length * sizeof( SKP_int32 ) );
+#endif
+}
+
+/***********************************/
+/* SKP_Silk_noise_shape_quantizer */
+/***********************************/
+SKP_INLINE void SKP_Silk_noise_shape_quantizer(
+ SKP_Silk_nsq_state *NSQ, /* I/O NSQ state */
+ SKP_int signalType, /* I Signal type */
+ const SKP_int32 x_sc_Q10[], /* I */
+ SKP_int8 pulses[], /* O */
+ SKP_int16 xq[], /* O */
+ SKP_int32 sLTP_Q16[], /* I/O LTP state */
+ const SKP_int16 a_Q12[], /* I Short term prediction coefs */
+ const SKP_int16 b_Q14[], /* I Long term prediction coefs */
+ const SKP_int16 AR_shp_Q13[], /* I Noise shaping AR coefs */
+ SKP_int lag, /* I Pitch lag */
+ SKP_int32 HarmShapeFIRPacked_Q14, /* I */
+ SKP_int Tilt_Q14, /* I Spectral tilt */
+ SKP_int32 LF_shp_Q14, /* I */
+ SKP_int32 Gain_Q16, /* I */
+ SKP_int Lambda_Q10, /* I */
+ SKP_int offset_Q10, /* I */
+ SKP_int length, /* I Input length */
+ SKP_int shapingLPCOrder, /* I Noise shaping AR filter order */
+ SKP_int predictLPCOrder /* I Prediction filter order */
+)
+{
+ SKP_int i, j;
+ SKP_int32 LTP_pred_Q14, LPC_pred_Q10, n_AR_Q10, n_LTP_Q14;
+ SKP_int32 n_LF_Q10, r_Q10, rr_Q10, q1_Q10, q2_Q10, rd1_Q10, rd2_Q10;
+ SKP_int32 dither, exc_Q10, LPC_exc_Q10, xq_Q10;
+ SKP_int32 tmp1, tmp2, sLF_AR_shp_Q10;
+ SKP_int32 *psLPC_Q14, *shp_lag_ptr, *pred_lag_ptr;
+
+ shp_lag_ptr = &NSQ->sLTP_shp_Q10[ NSQ->sLTP_shp_buf_idx - lag + HARM_SHAPE_FIR_TAPS / 2 ];
+ pred_lag_ptr = &sLTP_Q16[ NSQ->sLTP_buf_idx - lag + LTP_ORDER / 2 ];
+
+ /* Setup short term AR state */
+ psLPC_Q14 = &NSQ->sLPC_Q14[ NSQ_LPC_BUF_LENGTH - 1 ];
+
+ for( i = 0; i < length; i++ ) {
+ /* Generate dither */
+ NSQ->rand_seed = SKP_RAND( NSQ->rand_seed );
+
+ /* dither = rand_seed < 0 ? 0xFFFFFFFF : 0; */
+ dither = SKP_RSHIFT( NSQ->rand_seed, 31 );
+
+ /* Short-term prediction */
+ SKP_assert( ( predictLPCOrder & 1 ) == 0 ); /* check that order is even */
+ SKP_assert( ( (SKP_int64)a_Q12 & 3 ) == 0 ); /* check that array starts at 4-byte aligned address */
+ SKP_assert( predictLPCOrder >= 10 ); /* check that unrolling works */
+
+ /* Partially unrolled */
+ LPC_pred_Q10 = SKP_SMULWB( psLPC_Q14[ 0 ], a_Q12[ 0 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -1 ], a_Q12[ 1 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -2 ], a_Q12[ 2 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -3 ], a_Q12[ 3 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -4 ], a_Q12[ 4 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -5 ], a_Q12[ 5 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -6 ], a_Q12[ 6 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -7 ], a_Q12[ 7 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -8 ], a_Q12[ 8 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -9 ], a_Q12[ 9 ] );
+ for( j = 10; j < predictLPCOrder; j ++ ) {
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -j ], a_Q12[ j ] );
+ }
+
+ /* Long-term prediction */
+ if( signalType == TYPE_VOICED ) {
+ /* Unrolled loop */
+ LTP_pred_Q14 = SKP_SMULWB( pred_lag_ptr[ 0 ], b_Q14[ 0 ] );
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -1 ], b_Q14[ 1 ] );
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -2 ], b_Q14[ 2 ] );
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -3 ], b_Q14[ 3 ] );
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -4 ], b_Q14[ 4 ] );
+ pred_lag_ptr++;
+ } else {
+ LTP_pred_Q14 = 0;
+ }
+
+ /* Noise shape feedback */
+ SKP_assert( ( shapingLPCOrder & 1 ) == 0 ); /* check that order is even */
+ tmp2 = psLPC_Q14[ 0 ];
+ tmp1 = NSQ->sAR2_Q14[ 0 ];
+ NSQ->sAR2_Q14[ 0 ] = tmp2;
+ n_AR_Q10 = SKP_SMULWB( tmp2, AR_shp_Q13[ 0 ] );
+ for( j = 2; j < shapingLPCOrder; j += 2 ) {
+ tmp2 = NSQ->sAR2_Q14[ j - 1 ];
+ NSQ->sAR2_Q14[ j - 1 ] = tmp1;
+ n_AR_Q10 = SKP_SMLAWB( n_AR_Q10, tmp1, AR_shp_Q13[ j - 1 ] );
+ tmp1 = NSQ->sAR2_Q14[ j + 0 ];
+ NSQ->sAR2_Q14[ j + 0 ] = tmp2;
+ n_AR_Q10 = SKP_SMLAWB( n_AR_Q10, tmp2, AR_shp_Q13[ j ] );
+ }
+ NSQ->sAR2_Q14[ shapingLPCOrder - 1 ] = tmp1;
+ n_AR_Q10 = SKP_SMLAWB( n_AR_Q10, tmp1, AR_shp_Q13[ shapingLPCOrder - 1 ] );
+
+ n_AR_Q10 = SKP_RSHIFT( n_AR_Q10, 1 ); /* Q11 -> Q10 */
+ n_AR_Q10 = SKP_SMLAWB( n_AR_Q10, NSQ->sLF_AR_shp_Q12, Tilt_Q14 );
+
+ n_LF_Q10 = SKP_LSHIFT( SKP_SMULWB( NSQ->sLTP_shp_Q10[ NSQ->sLTP_shp_buf_idx - 1 ], LF_shp_Q14 ), 2 );
+ n_LF_Q10 = SKP_SMLAWT( n_LF_Q10, NSQ->sLF_AR_shp_Q12, LF_shp_Q14 );
+
+ SKP_assert( lag > 0 || signalType != TYPE_VOICED );
+
+ /* Long-term shaping */
+ if( lag > 0 ) {
+ /* Symmetric, packed FIR coefficients */
+ n_LTP_Q14 = SKP_SMULWB( SKP_ADD32( shp_lag_ptr[ 0 ], shp_lag_ptr[ -2 ] ), HarmShapeFIRPacked_Q14 );
+ n_LTP_Q14 = SKP_SMLAWT( n_LTP_Q14, shp_lag_ptr[ -1 ], HarmShapeFIRPacked_Q14 );
+ n_LTP_Q14 = SKP_LSHIFT( n_LTP_Q14, 6 );
+ shp_lag_ptr++;
+
+ tmp1 = SKP_SUB32( LTP_pred_Q14, n_LTP_Q14 ); /* Add Q14 stuff */
+ tmp1 = SKP_RSHIFT( tmp1, 4 ); /* convert to Q10 */
+ tmp1 = SKP_ADD32( tmp1, LPC_pred_Q10 ); /* add Q10 stuff */
+ tmp1 = SKP_SUB32( tmp1, n_AR_Q10 ); /* subtract Q10 stuff */
+ } else {
+ tmp1 = SKP_SUB32( LPC_pred_Q10, n_AR_Q10 ); /* subtract Q10 stuff */
+ }
+
+ /* Input minus prediction plus noise feedback */
+ //r = x[ i ] - LTP_pred - LPC_pred + n_AR + n_Tilt + n_LF + n_LTP;
+ tmp1 = SKP_SUB32( tmp1, n_LF_Q10 ); /* subtract Q10 stuff */
+ r_Q10 = SKP_SUB32( x_sc_Q10[ i ], tmp1 );
+
+ /* Flip sign depending on dither */
+ r_Q10 = r_Q10 ^ dither;
+ r_Q10 = SKP_LIMIT_32( r_Q10, -31 << 10, 30 << 10 );
+
+ /* Find two quantization level candidates and measure their rate-distortion */
+ q1_Q10 = SKP_SUB32( r_Q10, offset_Q10 );
+ q1_Q10 = SKP_RSHIFT( q1_Q10, 10 );
+ if( q1_Q10 > 0 ) {
+ q1_Q10 = SKP_SUB32( SKP_LSHIFT( q1_Q10, 10 ), QUANT_LEVEL_ADJUST_Q10 );
+ q1_Q10 = SKP_ADD32( q1_Q10, offset_Q10 );
+ q2_Q10 = SKP_ADD32( q1_Q10, 1024 );
+ rd1_Q10 = SKP_SMULBB( q1_Q10, Lambda_Q10 );
+ rd2_Q10 = SKP_SMULBB( q2_Q10, Lambda_Q10 );
+ } else if( q1_Q10 == 0 ) {
+ q1_Q10 = offset_Q10;
+ q2_Q10 = SKP_ADD32( q1_Q10, 1024 - QUANT_LEVEL_ADJUST_Q10 );
+ rd1_Q10 = SKP_SMULBB( q1_Q10, Lambda_Q10 );
+ rd2_Q10 = SKP_SMULBB( q2_Q10, Lambda_Q10 );
+ } else if( q1_Q10 == -1 ) {
+ q2_Q10 = offset_Q10;
+ q1_Q10 = SKP_SUB32( q2_Q10, 1024 - QUANT_LEVEL_ADJUST_Q10 );
+ rd1_Q10 = SKP_SMULBB( -q1_Q10, Lambda_Q10 );
+ rd2_Q10 = SKP_SMULBB( q2_Q10, Lambda_Q10 );
+ } else { /* Q1_Q10 < -1 */
+ q1_Q10 = SKP_ADD32( SKP_LSHIFT( q1_Q10, 10 ), QUANT_LEVEL_ADJUST_Q10 );
+ q1_Q10 = SKP_ADD32( q1_Q10, offset_Q10 );
+ q2_Q10 = SKP_ADD32( q1_Q10, 1024 );
+ rd1_Q10 = SKP_SMULBB( -q1_Q10, Lambda_Q10 );
+ rd2_Q10 = SKP_SMULBB( -q2_Q10, Lambda_Q10 );
+ }
+ rr_Q10 = SKP_SUB32( r_Q10, q1_Q10 );
+ rd1_Q10 = SKP_RSHIFT( SKP_SMLABB( rd1_Q10, rr_Q10, rr_Q10 ), 10 );
+ rr_Q10 = SKP_SUB32( r_Q10, q2_Q10 );
+ rd2_Q10 = SKP_RSHIFT( SKP_SMLABB( rd2_Q10, rr_Q10, rr_Q10 ), 10 );
+
+ if( rd2_Q10 < rd1_Q10 ) {
+ q1_Q10 = q2_Q10;
+ }
+
+ pulses[ i ] = ( SKP_int8 )SKP_RSHIFT_ROUND( q1_Q10, 10 );
+
+ /* Excitation */
+ exc_Q10 = q1_Q10 ^ dither;
+
+ /* Add predictions */
+ LPC_exc_Q10 = SKP_ADD32( exc_Q10, SKP_RSHIFT_ROUND( LTP_pred_Q14, 4 ) );
+ xq_Q10 = SKP_ADD32( LPC_exc_Q10, LPC_pred_Q10 );
+
+ /* Scale XQ back to normal level before saving */
+ xq[ i ] = ( SKP_int16 )SKP_SAT16( SKP_RSHIFT_ROUND( SKP_SMULWW( xq_Q10, Gain_Q16 ), 10 ) );
+
+ /* Update states */
+ psLPC_Q14++;
+ *psLPC_Q14 = SKP_LSHIFT( xq_Q10, 4 );
+ sLF_AR_shp_Q10 = SKP_SUB32( xq_Q10, n_AR_Q10 );
+ NSQ->sLF_AR_shp_Q12 = SKP_LSHIFT( sLF_AR_shp_Q10, 2 );
+
+ NSQ->sLTP_shp_Q10[ NSQ->sLTP_shp_buf_idx ] = SKP_SUB32( sLF_AR_shp_Q10, n_LF_Q10 );
+ sLTP_Q16[ NSQ->sLTP_buf_idx ] = SKP_LSHIFT( LPC_exc_Q10, 6 );
+ NSQ->sLTP_shp_buf_idx++;
+ NSQ->sLTP_buf_idx++;
+
+ /* Make dither dependent on quantized signal */
+ NSQ->rand_seed += pulses[ i ];
+ }
+
+ /* Update LPC synth buffer */
+ SKP_memcpy( NSQ->sLPC_Q14, &NSQ->sLPC_Q14[ length ], NSQ_LPC_BUF_LENGTH * sizeof( SKP_int32 ) );
+}
+
+SKP_INLINE void SKP_Silk_nsq_scale_states(
+ const SKP_Silk_encoder_state *psEncC, /* I Encoder State */
+ SKP_Silk_nsq_state *NSQ, /* I/O NSQ state */
+ const SKP_int16 x[], /* I input in Q0 */
+ SKP_int32 x_sc_Q10[], /* O input scaled with 1/Gain */
+ const SKP_int16 sLTP[], /* I re-whitened LTP state in Q0 */
+ SKP_int32 sLTP_Q16[], /* O LTP state matching scaled input */
+ SKP_int subfr, /* I subframe number */
+ const SKP_int LTP_scale_Q14, /* I */
+ const SKP_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I */
+ const SKP_int pitchL[ MAX_NB_SUBFR ] /* I */
+)
+{
+ SKP_int i, lag;
+ SKP_int32 inv_gain_Q16, gain_adj_Q16, inv_gain_Q32;
+
+ inv_gain_Q16 = SKP_INVERSE32_varQ( SKP_max( Gains_Q16[ subfr ], 1 ), 32 );
+ inv_gain_Q16 = SKP_min( inv_gain_Q16, SKP_int16_MAX );
+ lag = pitchL[ subfr ];
+
+ /* After rewhitening the LTP state is un-scaled, so scale with inv_gain_Q16 */
+ if( NSQ->rewhite_flag ) {
+ inv_gain_Q32 = SKP_LSHIFT( inv_gain_Q16, 16 );
+ if( subfr == 0 ) {
+ /* Do LTP downscaling */
+ inv_gain_Q32 = SKP_LSHIFT( SKP_SMULWB( inv_gain_Q32, LTP_scale_Q14 ), 2 );
+ }
+ for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx; i++ ) {
+ SKP_assert( i < MAX_FRAME_LENGTH );
+ sLTP_Q16[ i ] = SKP_SMULWB( inv_gain_Q32, sLTP[ i ] );
+ }
+ }
+
+ /* Adjust for changing gain */
+ if( inv_gain_Q16 != NSQ->prev_inv_gain_Q16 ) {
+ gain_adj_Q16 = SKP_DIV32_varQ( inv_gain_Q16, NSQ->prev_inv_gain_Q16, 16 );
+
+ /* Scale long-term shaping state */
+ for( i = NSQ->sLTP_shp_buf_idx - psEncC->ltp_mem_length; i < NSQ->sLTP_shp_buf_idx; i++ ) {
+ NSQ->sLTP_shp_Q10[ i ] = SKP_SMULWW( gain_adj_Q16, NSQ->sLTP_shp_Q10[ i ] );
+ }
+
+ /* Scale long-term prediction state */
+ if( NSQ->rewhite_flag == 0 ) {
+ for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx; i++ ) {
+ sLTP_Q16[ i ] = SKP_SMULWW( gain_adj_Q16, sLTP_Q16[ i ] );
+ }
+ }
+
+ NSQ->sLF_AR_shp_Q12 = SKP_SMULWW( gain_adj_Q16, NSQ->sLF_AR_shp_Q12 );
+
+ /* Scale short-term prediction and shaping states */
+ for( i = 0; i < NSQ_LPC_BUF_LENGTH; i++ ) {
+ NSQ->sLPC_Q14[ i ] = SKP_SMULWW( gain_adj_Q16, NSQ->sLPC_Q14[ i ] );
+ }
+ for( i = 0; i < MAX_SHAPE_LPC_ORDER; i++ ) {
+ NSQ->sAR2_Q14[ i ] = SKP_SMULWW( gain_adj_Q16, NSQ->sAR2_Q14[ i ] );
+ }
+ }
+
+ /* Scale input */
+ for( i = 0; i < psEncC->subfr_length; i++ ) {
+ x_sc_Q10[ i ] = SKP_RSHIFT( SKP_SMULBB( x[ i ], ( SKP_int16 )inv_gain_Q16 ), 6 );
+ }
+
+ /* save inv_gain */
+ SKP_assert( inv_gain_Q16 != 0 );
+ NSQ->prev_inv_gain_Q16 = inv_gain_Q16;
+}
--- /dev/null
+++ b/src_common/SKP_Silk_NSQ_del_dec.c
@@ -1,0 +1,680 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+typedef struct {
+ SKP_int32 sLPC_Q14[ MAX_FRAME_LENGTH / MAX_NB_SUBFR + NSQ_LPC_BUF_LENGTH ];
+ SKP_int32 RandState[ DECISION_DELAY ];
+ SKP_int32 Q_Q10[ DECISION_DELAY ];
+ SKP_int32 Xq_Q10[ DECISION_DELAY ];
+ SKP_int32 Pred_Q16[ DECISION_DELAY ];
+ SKP_int32 Shape_Q10[ DECISION_DELAY ];
+ SKP_int32 sAR2_Q14[ MAX_SHAPE_LPC_ORDER ];
+ SKP_int32 LF_AR_Q12;
+ SKP_int32 Seed;
+ SKP_int32 SeedInit;
+ SKP_int32 RD_Q10;
+} NSQ_del_dec_struct;
+
+typedef struct {
+ SKP_int32 Q_Q10;
+ SKP_int32 RD_Q10;
+ SKP_int32 xq_Q14;
+ SKP_int32 LF_AR_Q12;
+ SKP_int32 sLTP_shp_Q10;
+ SKP_int32 LPC_exc_Q16;
+} NSQ_sample_struct;
+
+SKP_INLINE void SKP_Silk_nsq_del_dec_scale_states(
+ const SKP_Silk_encoder_state *psEncC, /* I Encoder State */
+ SKP_Silk_nsq_state *NSQ, /* I/O NSQ state */
+ NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */
+ const SKP_int16 x[], /* I Input in Q0 */
+ SKP_int32 x_sc_Q10[], /* O Input scaled with 1/Gain in Q10 */
+ const SKP_int16 sLTP[], /* I Re-whitened LTP state in Q0 */
+ SKP_int32 sLTP_Q16[], /* O LTP state matching scaled input */
+ SKP_int subfr, /* I Subframe number */
+ SKP_int nStatesDelayedDecision, /* I Number of del dec states */
+ SKP_int smpl_buf_idx, /* I Index to newest samples in buffers */
+ const SKP_int LTP_scale_Q14, /* I LTP state scaling */
+ const SKP_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I */
+ const SKP_int pitchL[ MAX_NB_SUBFR ] /* I Pitch lag */
+);
+
+/******************************************/
+/* Noise shape quantizer for one subframe */
+/******************************************/
+SKP_INLINE void SKP_Silk_noise_shape_quantizer_del_dec(
+ SKP_Silk_nsq_state *NSQ, /* I/O NSQ state */
+ NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */
+ SKP_int signalType, /* I Signal type */
+ const SKP_int32 x_Q10[], /* I */
+ SKP_int8 pulses[], /* O */
+ SKP_int16 xq[], /* O */
+ SKP_int32 sLTP_Q16[], /* I/O LTP filter state */
+ SKP_int32 delayedGain_Q16[], /* I/O Gain delay buffer */
+ const SKP_int16 a_Q12[], /* I Short term prediction coefs */
+ const SKP_int16 b_Q14[], /* I Long term prediction coefs */
+ const SKP_int16 AR_shp_Q13[], /* I Noise shaping coefs */
+ SKP_int lag, /* I Pitch lag */
+ SKP_int32 HarmShapeFIRPacked_Q14, /* I */
+ SKP_int Tilt_Q14, /* I Spectral tilt */
+ SKP_int32 LF_shp_Q14, /* I */
+ SKP_int32 Gain_Q16, /* I */
+ SKP_int Lambda_Q10, /* I */
+ SKP_int offset_Q10, /* I */
+ SKP_int length, /* I Input length */
+ SKP_int subfr, /* I Subframe number */
+ SKP_int shapingLPCOrder, /* I Shaping LPC filter order */
+ SKP_int predictLPCOrder, /* I Prediction filter order */
+ SKP_int warping_Q16, /* I */
+ SKP_int nStatesDelayedDecision, /* I Number of states in decision tree */
+ SKP_int *smpl_buf_idx, /* I Index to newest samples in buffers */
+ SKP_int decisionDelay /* I */
+);
+
+void SKP_Silk_NSQ_del_dec(
+ const SKP_Silk_encoder_state *psEncC, /* I/O Encoder State */
+ SKP_Silk_nsq_state *NSQ, /* I/O NSQ state */
+ SideInfoIndices *psIndices, /* I/O Quantization Indices */
+ const SKP_int16 x[], /* I Prefiltered input signal */
+ SKP_int8 pulses[], /* O Quantized pulse signal */
+ const SKP_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I Prediction coefs */
+ const SKP_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I LT prediction coefs */
+ const SKP_int16 AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I */
+ const SKP_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I */
+ const SKP_int Tilt_Q14[ MAX_NB_SUBFR ], /* I Spectral tilt */
+ const SKP_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I */
+ const SKP_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I */
+ const SKP_int pitchL[ MAX_NB_SUBFR ], /* I */
+ const SKP_int Lambda_Q10, /* I */
+ const SKP_int LTP_scale_Q14 /* I LTP state scaling */
+)
+{
+ SKP_int i, k, lag, start_idx, LSF_interpolation_flag, Winner_ind, subfr;
+ SKP_int last_smple_idx, smpl_buf_idx, decisionDelay;
+ const SKP_int16 *A_Q12, *B_Q14, *AR_shp_Q13;
+ SKP_int16 *pxq;
+ SKP_int32 sLTP_Q16[ 2 * MAX_FRAME_LENGTH ];
+ SKP_int16 sLTP[ 2 * MAX_FRAME_LENGTH ];
+ SKP_int32 HarmShapeFIRPacked_Q14;
+ SKP_int offset_Q10;
+ SKP_int32 RDmin_Q10;
+ SKP_int32 x_sc_Q10[ MAX_SUB_FRAME_LENGTH ];
+ SKP_int32 delayedGain_Q16[ DECISION_DELAY ];
+ NSQ_del_dec_struct psDelDec[ MAX_DEL_DEC_STATES ];
+ NSQ_del_dec_struct *psDD;
+
+ /* Set unvoiced lag to the previous one, overwrite later for voiced */
+ lag = NSQ->lagPrev;
+
+ SKP_assert( NSQ->prev_inv_gain_Q16 != 0 );
+
+ /* Initialize delayed decision states */
+ SKP_memset( psDelDec, 0, psEncC->nStatesDelayedDecision * sizeof( NSQ_del_dec_struct ) );
+ for( k = 0; k < psEncC->nStatesDelayedDecision; k++ ) {
+ psDD = &psDelDec[ k ];
+ psDD->Seed = ( k + psIndices->Seed ) & 3;
+ psDD->SeedInit = psDD->Seed;
+ psDD->RD_Q10 = 0;
+ psDD->LF_AR_Q12 = NSQ->sLF_AR_shp_Q12;
+ psDD->Shape_Q10[ 0 ] = NSQ->sLTP_shp_Q10[ psEncC->ltp_mem_length - 1 ];
+ SKP_memcpy( psDD->sLPC_Q14, NSQ->sLPC_Q14, NSQ_LPC_BUF_LENGTH * sizeof( SKP_int32 ) );
+ SKP_memcpy( psDD->sAR2_Q14, NSQ->sAR2_Q14, sizeof( NSQ->sAR2_Q14 ) );
+ }
+
+ offset_Q10 = SKP_Silk_Quantization_Offsets_Q10[ psIndices->signalType >> 1 ][ psIndices->quantOffsetType ];
+ smpl_buf_idx = 0; /* index of oldest samples */
+
+ decisionDelay = SKP_min_int( DECISION_DELAY, psEncC->subfr_length );
+
+ /* For voiced frames limit the decision delay to lower than the pitch lag */
+ if( psIndices->signalType == TYPE_VOICED ) {
+ for( k = 0; k < psEncC->nb_subfr; k++ ) {
+ decisionDelay = SKP_min_int( decisionDelay, pitchL[ k ] - LTP_ORDER / 2 - 1 );
+ }
+ } else {
+ if( lag > 0 ) {
+ decisionDelay = SKP_min_int( decisionDelay, lag - LTP_ORDER / 2 - 1 );
+ }
+ }
+
+ if( psIndices->NLSFInterpCoef_Q2 == 4 ) {
+ LSF_interpolation_flag = 0;
+ } else {
+ LSF_interpolation_flag = 1;
+ }
+
+ /* Setup pointers to start of sub frame */
+ pxq = &NSQ->xq[ psEncC->ltp_mem_length ];
+ NSQ->sLTP_shp_buf_idx = psEncC->ltp_mem_length;
+ NSQ->sLTP_buf_idx = psEncC->ltp_mem_length;
+ subfr = 0;
+ for( k = 0; k < psEncC->nb_subfr; k++ ) {
+ A_Q12 = &PredCoef_Q12[ ( ( k >> 1 ) | ( 1 - LSF_interpolation_flag ) ) * MAX_LPC_ORDER ];
+ B_Q14 = <PCoef_Q14[ k * LTP_ORDER ];
+ AR_shp_Q13 = &AR2_Q13[ k * MAX_SHAPE_LPC_ORDER ];
+
+ /* Noise shape parameters */
+ SKP_assert( HarmShapeGain_Q14[ k ] >= 0 );
+ HarmShapeFIRPacked_Q14 = SKP_RSHIFT( HarmShapeGain_Q14[ k ], 2 );
+ HarmShapeFIRPacked_Q14 |= SKP_LSHIFT( ( SKP_int32 )SKP_RSHIFT( HarmShapeGain_Q14[ k ], 1 ), 16 );
+
+ NSQ->rewhite_flag = 0;
+ if( psIndices->signalType == TYPE_VOICED ) {
+ /* Voiced */
+ lag = pitchL[ k ];
+
+ /* Re-whitening */
+ if( ( k & ( 3 - SKP_LSHIFT( LSF_interpolation_flag, 1 ) ) ) == 0 ) {
+ if( k == 2 ) {
+ /* RESET DELAYED DECISIONS */
+ /* Find winner */
+ RDmin_Q10 = psDelDec[ 0 ].RD_Q10;
+ Winner_ind = 0;
+ for( i = 1; i < psEncC->nStatesDelayedDecision; i++ ) {
+ if( psDelDec[ i ].RD_Q10 < RDmin_Q10 ) {
+ RDmin_Q10 = psDelDec[ i ].RD_Q10;
+ Winner_ind = i;
+ }
+ }
+ for( i = 0; i < psEncC->nStatesDelayedDecision; i++ ) {
+ if( i != Winner_ind ) {
+ psDelDec[ i ].RD_Q10 += ( SKP_int32_MAX >> 4 );
+ SKP_assert( psDelDec[ i ].RD_Q10 >= 0 );
+ }
+ }
+
+ /* Copy final part of signals from winner state to output and long-term filter states */
+ psDD = &psDelDec[ Winner_ind ];
+ last_smple_idx = smpl_buf_idx + decisionDelay;
+ for( i = 0; i < decisionDelay; i++ ) {
+ last_smple_idx = ( last_smple_idx - 1 ) & DECISION_DELAY_MASK;
+ pulses[ i - decisionDelay ] = ( SKP_int8 )SKP_RSHIFT_ROUND( psDD->Q_Q10[ last_smple_idx ], 10 );
+ pxq[ i - decisionDelay ] = ( SKP_int16 )SKP_SAT16( SKP_RSHIFT_ROUND(
+ SKP_SMULWW( psDD->Xq_Q10[ last_smple_idx ], Gains_Q16[ 1 ] ), 10 ) );
+ NSQ->sLTP_shp_Q10[ NSQ->sLTP_shp_buf_idx - decisionDelay + i ] = psDD->Shape_Q10[ last_smple_idx ];
+ }
+
+ subfr = 0;
+ }
+
+ /* Rewhiten with new A coefs */
+ start_idx = psEncC->ltp_mem_length - lag - psEncC->predictLPCOrder - LTP_ORDER / 2;
+ SKP_assert( start_idx > 0 );
+
+ SKP_Silk_LPC_analysis_filter( &sLTP[ start_idx ], &NSQ->xq[ start_idx + k * psEncC->subfr_length ],
+ A_Q12, psEncC->ltp_mem_length - start_idx, psEncC->predictLPCOrder );
+
+ NSQ->sLTP_buf_idx = psEncC->ltp_mem_length;
+ NSQ->rewhite_flag = 1;
+ }
+ }
+
+ SKP_Silk_nsq_del_dec_scale_states( psEncC, NSQ, psDelDec, x, x_sc_Q10, sLTP, sLTP_Q16, k,
+ psEncC->nStatesDelayedDecision, smpl_buf_idx, LTP_scale_Q14, Gains_Q16, pitchL );
+
+ SKP_Silk_noise_shape_quantizer_del_dec( NSQ, psDelDec, psIndices->signalType, x_sc_Q10, pulses, pxq, sLTP_Q16,
+ delayedGain_Q16, A_Q12, B_Q14, AR_shp_Q13, lag, HarmShapeFIRPacked_Q14, Tilt_Q14[ k ], LF_shp_Q14[ k ],
+ Gains_Q16[ k ], Lambda_Q10, offset_Q10, psEncC->subfr_length, subfr++, psEncC->shapingLPCOrder,
+ psEncC->predictLPCOrder, psEncC->warping_Q16, psEncC->nStatesDelayedDecision, &smpl_buf_idx, decisionDelay );
+
+ x += psEncC->subfr_length;
+ pulses += psEncC->subfr_length;
+ pxq += psEncC->subfr_length;
+ }
+
+ /* Find winner */
+ RDmin_Q10 = psDelDec[ 0 ].RD_Q10;
+ Winner_ind = 0;
+ for( k = 1; k < psEncC->nStatesDelayedDecision; k++ ) {
+ if( psDelDec[ k ].RD_Q10 < RDmin_Q10 ) {
+ RDmin_Q10 = psDelDec[ k ].RD_Q10;
+ Winner_ind = k;
+ }
+ }
+
+ /* Copy final part of signals from winner state to output and long-term filter states */
+ psDD = &psDelDec[ Winner_ind ];
+ psIndices->Seed = psDD->SeedInit;
+ last_smple_idx = smpl_buf_idx + decisionDelay;
+ for( i = 0; i < decisionDelay; i++ ) {
+ last_smple_idx = ( last_smple_idx - 1 ) & DECISION_DELAY_MASK;
+ pulses[ i - decisionDelay ] = ( SKP_int8 )SKP_RSHIFT_ROUND( psDD->Q_Q10[ last_smple_idx ], 10 );
+ pxq[ i - decisionDelay ] = ( SKP_int16 )SKP_SAT16( SKP_RSHIFT_ROUND(
+ SKP_SMULWW( psDD->Xq_Q10[ last_smple_idx ], Gains_Q16[ psEncC->nb_subfr - 1 ] ), 10 ) );
+ NSQ->sLTP_shp_Q10[ NSQ->sLTP_shp_buf_idx - decisionDelay + i ] = psDD->Shape_Q10[ last_smple_idx ];
+ sLTP_Q16[ NSQ->sLTP_buf_idx - decisionDelay + i ] = psDD->Pred_Q16[ last_smple_idx ];
+ }
+ SKP_memcpy( NSQ->sLPC_Q14, &psDD->sLPC_Q14[ psEncC->subfr_length ], NSQ_LPC_BUF_LENGTH * sizeof( SKP_int32 ) );
+ SKP_memcpy( NSQ->sAR2_Q14, psDD->sAR2_Q14, sizeof( psDD->sAR2_Q14 ) );
+
+ /* Update states */
+ NSQ->sLF_AR_shp_Q12 = psDD->LF_AR_Q12;
+ NSQ->lagPrev = pitchL[ psEncC->nb_subfr - 1 ];
+
+ /* Save quantized speech and noise shaping signals */
+ SKP_memmove( NSQ->xq, &NSQ->xq[ psEncC->frame_length ], psEncC->ltp_mem_length * sizeof( SKP_int16 ) );
+ SKP_memmove( NSQ->sLTP_shp_Q10, &NSQ->sLTP_shp_Q10[ psEncC->frame_length ], psEncC->ltp_mem_length * sizeof( SKP_int32 ) );
+
+#ifdef SAVE_ALL_INTERNAL_DATA
+ DEBUG_STORE_DATA( xq.dat, &pxq[ -psEncC->frame_length ], psEncC->frame_length * sizeof( SKP_int16 ) );
+ DEBUG_STORE_DATA( q.dat, &pulses[ -psEncC->frame_length ], psEncC->frame_length * sizeof( SKP_int8 ) );
+ DEBUG_STORE_DATA( sLTP_Q16.dat, &sLTP_Q16[ psEncC->ltp_mem_length ], psEncC->frame_length * sizeof( SKP_int32 ) );
+#endif
+}
+
+/******************************************/
+/* Noise shape quantizer for one subframe */
+/******************************************/
+SKP_INLINE void SKP_Silk_noise_shape_quantizer_del_dec(
+ SKP_Silk_nsq_state *NSQ, /* I/O NSQ state */
+ NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */
+ SKP_int signalType, /* I Signal type */
+ const SKP_int32 x_Q10[], /* I */
+ SKP_int8 pulses[], /* O */
+ SKP_int16 xq[], /* O */
+ SKP_int32 sLTP_Q16[], /* I/O LTP filter state */
+ SKP_int32 delayedGain_Q16[], /* I/O Gain delay buffer */
+ const SKP_int16 a_Q12[], /* I Short term prediction coefs */
+ const SKP_int16 b_Q14[], /* I Long term prediction coefs */
+ const SKP_int16 AR_shp_Q13[], /* I Noise shaping coefs */
+ SKP_int lag, /* I Pitch lag */
+ SKP_int32 HarmShapeFIRPacked_Q14, /* I */
+ SKP_int Tilt_Q14, /* I Spectral tilt */
+ SKP_int32 LF_shp_Q14, /* I */
+ SKP_int32 Gain_Q16, /* I */
+ SKP_int Lambda_Q10, /* I */
+ SKP_int offset_Q10, /* I */
+ SKP_int length, /* I Input length */
+ SKP_int subfr, /* I Subframe number */
+ SKP_int shapingLPCOrder, /* I Shaping LPC filter order */
+ SKP_int predictLPCOrder, /* I Prediction filter order */
+ SKP_int warping_Q16, /* I */
+ SKP_int nStatesDelayedDecision, /* I Number of states in decision tree */
+ SKP_int *smpl_buf_idx, /* I Index to newest samples in buffers */
+ SKP_int decisionDelay /* I */
+)
+{
+ SKP_int i, j, k, Winner_ind, RDmin_ind, RDmax_ind, last_smple_idx;
+ SKP_int32 Winner_rand_state;
+ SKP_int32 LTP_pred_Q14, LPC_pred_Q10, n_AR_Q10, n_LTP_Q14, LTP_Q10;
+ SKP_int32 n_LF_Q10, r_Q10, rr_Q10, rd1_Q10, rd2_Q10, RDmin_Q10, RDmax_Q10;
+ SKP_int32 q1_Q10, q2_Q10, dither, exc_Q10, LPC_exc_Q10, xq_Q10;
+ SKP_int32 tmp1, tmp2, sLF_AR_shp_Q10;
+ SKP_int32 *pred_lag_ptr, *shp_lag_ptr, *psLPC_Q14;
+ NSQ_sample_struct psSampleState[ MAX_DEL_DEC_STATES ][ 2 ];
+ NSQ_del_dec_struct *psDD;
+ NSQ_sample_struct *psSS;
+
+ shp_lag_ptr = &NSQ->sLTP_shp_Q10[ NSQ->sLTP_shp_buf_idx - lag + HARM_SHAPE_FIR_TAPS / 2 ];
+ pred_lag_ptr = &sLTP_Q16[ NSQ->sLTP_buf_idx - lag + LTP_ORDER / 2 ];
+
+ for( i = 0; i < length; i++ ) {
+ /* Perform common calculations used in all states */
+
+ /* Long-term prediction */
+ if( signalType == TYPE_VOICED ) {
+ /* Unrolled loop */
+ LTP_pred_Q14 = SKP_SMULWB( pred_lag_ptr[ 0 ], b_Q14[ 0 ] );
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -1 ], b_Q14[ 1 ] );
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -2 ], b_Q14[ 2 ] );
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -3 ], b_Q14[ 3 ] );
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -4 ], b_Q14[ 4 ] );
+ pred_lag_ptr++;
+ } else {
+ LTP_pred_Q14 = 0;
+ }
+
+ /* Long-term shaping */
+ if( lag > 0 ) {
+ /* Symmetric, packed FIR coefficients */
+ n_LTP_Q14 = SKP_SMULWB( SKP_ADD32( shp_lag_ptr[ 0 ], shp_lag_ptr[ -2 ] ), HarmShapeFIRPacked_Q14 );
+ n_LTP_Q14 = SKP_SMLAWT( n_LTP_Q14, shp_lag_ptr[ -1 ], HarmShapeFIRPacked_Q14 );
+ n_LTP_Q14 = SKP_LSHIFT( n_LTP_Q14, 6 );
+ shp_lag_ptr++;
+
+ LTP_Q10 = SKP_RSHIFT( SKP_SUB32( LTP_pred_Q14, n_LTP_Q14 ), 4 );
+ } else {
+ LTP_Q10 = 0;
+ }
+
+ for( k = 0; k < nStatesDelayedDecision; k++ ) {
+ /* Delayed decision state */
+ psDD = &psDelDec[ k ];
+
+ /* Sample state */
+ psSS = psSampleState[ k ];
+
+ /* Generate dither */
+ psDD->Seed = SKP_RAND( psDD->Seed );
+
+ /* dither = rand_seed < 0 ? 0xFFFFFFFF : 0; */
+ dither = SKP_RSHIFT( psDD->Seed, 31 );
+
+ /* Pointer used in short term prediction and shaping */
+ psLPC_Q14 = &psDD->sLPC_Q14[ NSQ_LPC_BUF_LENGTH - 1 + i ];
+ /* Short-term prediction */
+ SKP_assert( predictLPCOrder >= 10 ); /* check that unrolling works */
+ SKP_assert( ( predictLPCOrder & 1 ) == 0 ); /* check that order is even */
+ SKP_assert( ( (SKP_int64)a_Q12 & 3 ) == 0 ); /* check that array starts at 4-byte aligned address */
+ /* Partially unrolled */
+ LPC_pred_Q10 = SKP_SMULWB( psLPC_Q14[ 0 ], a_Q12[ 0 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -1 ], a_Q12[ 1 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -2 ], a_Q12[ 2 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -3 ], a_Q12[ 3 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -4 ], a_Q12[ 4 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -5 ], a_Q12[ 5 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -6 ], a_Q12[ 6 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -7 ], a_Q12[ 7 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -8 ], a_Q12[ 8 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -9 ], a_Q12[ 9 ] );
+ for( j = 10; j < predictLPCOrder; j ++ ) {
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -j ], a_Q12[ j ] );
+ }
+
+ /* Noise shape feedback */
+ SKP_assert( ( shapingLPCOrder & 1 ) == 0 ); /* check that order is even */
+ /* Output of lowpass section */
+ tmp2 = SKP_SMLAWB( psLPC_Q14[ 0 ], psDD->sAR2_Q14[ 0 ], warping_Q16 );
+ /* Output of allpass section */
+ tmp1 = SKP_SMLAWB( psDD->sAR2_Q14[ 0 ], psDD->sAR2_Q14[ 1 ] - tmp2, warping_Q16 );
+ psDD->sAR2_Q14[ 0 ] = tmp2;
+ n_AR_Q10 = SKP_SMULWB( tmp2, AR_shp_Q13[ 0 ] );
+ /* Loop over allpass sections */
+ for( j = 2; j < shapingLPCOrder; j += 2 ) {
+ /* Output of allpass section */
+ tmp2 = SKP_SMLAWB( psDD->sAR2_Q14[ j - 1 ], psDD->sAR2_Q14[ j + 0 ] - tmp1, warping_Q16 );
+ psDD->sAR2_Q14[ j - 1 ] = tmp1;
+ n_AR_Q10 = SKP_SMLAWB( n_AR_Q10, tmp1, AR_shp_Q13[ j - 1 ] );
+ /* Output of allpass section */
+ tmp1 = SKP_SMLAWB( psDD->sAR2_Q14[ j + 0 ], psDD->sAR2_Q14[ j + 1 ] - tmp2, warping_Q16 );
+ psDD->sAR2_Q14[ j + 0 ] = tmp2;
+ n_AR_Q10 = SKP_SMLAWB( n_AR_Q10, tmp2, AR_shp_Q13[ j ] );
+ }
+ psDD->sAR2_Q14[ shapingLPCOrder - 1 ] = tmp1;
+ n_AR_Q10 = SKP_SMLAWB( n_AR_Q10, tmp1, AR_shp_Q13[ shapingLPCOrder - 1 ] );
+
+ n_AR_Q10 = SKP_RSHIFT( n_AR_Q10, 1 ); /* Q11 -> Q10 */
+ n_AR_Q10 = SKP_SMLAWB( n_AR_Q10, psDD->LF_AR_Q12, Tilt_Q14 );
+
+ n_LF_Q10 = SKP_LSHIFT( SKP_SMULWB( psDD->Shape_Q10[ *smpl_buf_idx ], LF_shp_Q14 ), 2 );
+ n_LF_Q10 = SKP_SMLAWT( n_LF_Q10, psDD->LF_AR_Q12, LF_shp_Q14 );
+
+ /* Input minus prediction plus noise feedback */
+ /* r = x[ i ] - LTP_pred - LPC_pred + n_AR + n_Tilt + n_LF + n_LTP */
+ tmp1 = SKP_ADD32( LTP_Q10, LPC_pred_Q10 ); /* add Q10 stuff */
+ tmp1 = SKP_SUB32( tmp1, n_AR_Q10 ); /* subtract Q10 stuff */
+ tmp1 = SKP_SUB32( tmp1, n_LF_Q10 ); /* subtract Q10 stuff */
+ r_Q10 = SKP_SUB32( x_Q10[ i ], tmp1 ); /* residual error Q10 */
+
+ /* Flip sign depending on dither */
+ r_Q10 = r_Q10 ^ dither;
+ r_Q10 = SKP_LIMIT_32( r_Q10, -31 << 10, 30 << 10 );
+
+ /* Find two quantization level candidates and measure their rate-distortion */
+ q1_Q10 = SKP_SUB32( r_Q10, offset_Q10 );
+ q1_Q10 = SKP_RSHIFT( q1_Q10, 10 );
+ if( q1_Q10 > 0 ) {
+ q1_Q10 = SKP_SUB32( SKP_LSHIFT( q1_Q10, 10 ), QUANT_LEVEL_ADJUST_Q10 );
+ q1_Q10 = SKP_ADD32( q1_Q10, offset_Q10 );
+ q2_Q10 = SKP_ADD32( q1_Q10, 1024 );
+ rd1_Q10 = SKP_SMULBB( q1_Q10, Lambda_Q10 );
+ rd2_Q10 = SKP_SMULBB( q2_Q10, Lambda_Q10 );
+ } else if( q1_Q10 == 0 ) {
+ q1_Q10 = offset_Q10;
+ q2_Q10 = SKP_ADD32( q1_Q10, 1024 - QUANT_LEVEL_ADJUST_Q10 );
+ rd1_Q10 = SKP_SMULBB( q1_Q10, Lambda_Q10 );
+ rd2_Q10 = SKP_SMULBB( q2_Q10, Lambda_Q10 );
+ } else if( q1_Q10 == -1 ) {
+ q2_Q10 = offset_Q10;
+ q1_Q10 = SKP_SUB32( q2_Q10, 1024 - QUANT_LEVEL_ADJUST_Q10 );
+ rd1_Q10 = SKP_SMULBB( -q1_Q10, Lambda_Q10 );
+ rd2_Q10 = SKP_SMULBB( q2_Q10, Lambda_Q10 );
+ } else { /* Q1_Q10 < -1 */
+ q1_Q10 = SKP_ADD32( SKP_LSHIFT( q1_Q10, 10 ), QUANT_LEVEL_ADJUST_Q10 );
+ q1_Q10 = SKP_ADD32( q1_Q10, offset_Q10 );
+ q2_Q10 = SKP_ADD32( q1_Q10, 1024 );
+ rd1_Q10 = SKP_SMULBB( -q1_Q10, Lambda_Q10 );
+ rd2_Q10 = SKP_SMULBB( -q2_Q10, Lambda_Q10 );
+ }
+ rr_Q10 = SKP_SUB32( r_Q10, q1_Q10 );
+ rd1_Q10 = SKP_RSHIFT( SKP_SMLABB( rd1_Q10, rr_Q10, rr_Q10 ), 10 );
+ rr_Q10 = SKP_SUB32( r_Q10, q2_Q10 );
+ rd2_Q10 = SKP_RSHIFT( SKP_SMLABB( rd2_Q10, rr_Q10, rr_Q10 ), 10 );
+
+ if( rd1_Q10 < rd2_Q10 ) {
+ psSS[ 0 ].RD_Q10 = SKP_ADD32( psDD->RD_Q10, rd1_Q10 );
+ psSS[ 1 ].RD_Q10 = SKP_ADD32( psDD->RD_Q10, rd2_Q10 );
+ psSS[ 0 ].Q_Q10 = q1_Q10;
+ psSS[ 1 ].Q_Q10 = q2_Q10;
+ } else {
+ psSS[ 0 ].RD_Q10 = SKP_ADD32( psDD->RD_Q10, rd2_Q10 );
+ psSS[ 1 ].RD_Q10 = SKP_ADD32( psDD->RD_Q10, rd1_Q10 );
+ psSS[ 0 ].Q_Q10 = q2_Q10;
+ psSS[ 1 ].Q_Q10 = q1_Q10;
+ }
+
+ /* Update states for best quantization */
+
+ /* Quantized excitation */
+ exc_Q10 = psSS[ 0 ].Q_Q10 ^ dither;
+
+ /* Add predictions */
+ LPC_exc_Q10 = exc_Q10 + SKP_RSHIFT_ROUND( LTP_pred_Q14, 4 );
+ xq_Q10 = SKP_ADD32( LPC_exc_Q10, LPC_pred_Q10 );
+
+ /* Update states */
+ sLF_AR_shp_Q10 = SKP_SUB32( xq_Q10, n_AR_Q10 );
+ psSS[ 0 ].sLTP_shp_Q10 = SKP_SUB32( sLF_AR_shp_Q10, n_LF_Q10 );
+ psSS[ 0 ].LF_AR_Q12 = SKP_LSHIFT( sLF_AR_shp_Q10, 2 );
+ psSS[ 0 ].xq_Q14 = SKP_LSHIFT( xq_Q10, 4 );
+ psSS[ 0 ].LPC_exc_Q16 = SKP_LSHIFT( LPC_exc_Q10, 6 );
+
+ /* Update states for second best quantization */
+
+ /* Quantized excitation */
+ exc_Q10 = psSS[ 1 ].Q_Q10 ^ dither;
+
+ /* Add predictions */
+ LPC_exc_Q10 = exc_Q10 + SKP_RSHIFT_ROUND( LTP_pred_Q14, 4 );
+ xq_Q10 = SKP_ADD32( LPC_exc_Q10, LPC_pred_Q10 );
+
+ /* Update states */
+ sLF_AR_shp_Q10 = SKP_SUB32( xq_Q10, n_AR_Q10 );
+ psSS[ 1 ].sLTP_shp_Q10 = SKP_SUB32( sLF_AR_shp_Q10, n_LF_Q10 );
+ psSS[ 1 ].LF_AR_Q12 = SKP_LSHIFT( sLF_AR_shp_Q10, 2 );
+ psSS[ 1 ].xq_Q14 = SKP_LSHIFT( xq_Q10, 4 );
+ psSS[ 1 ].LPC_exc_Q16 = SKP_LSHIFT( LPC_exc_Q10, 6 );
+ }
+
+ *smpl_buf_idx = ( *smpl_buf_idx - 1 ) & DECISION_DELAY_MASK; /* Index to newest samples */
+ last_smple_idx = ( *smpl_buf_idx + decisionDelay ) & DECISION_DELAY_MASK; /* Index to decisionDelay old samples */
+
+ /* Find winner */
+ RDmin_Q10 = psSampleState[ 0 ][ 0 ].RD_Q10;
+ Winner_ind = 0;
+ for( k = 1; k < nStatesDelayedDecision; k++ ) {
+ if( psSampleState[ k ][ 0 ].RD_Q10 < RDmin_Q10 ) {
+ RDmin_Q10 = psSampleState[ k ][ 0 ].RD_Q10;
+ Winner_ind = k;
+ }
+ }
+
+ /* Increase RD values of expired states */
+ Winner_rand_state = psDelDec[ Winner_ind ].RandState[ last_smple_idx ];
+ for( k = 0; k < nStatesDelayedDecision; k++ ) {
+ if( psDelDec[ k ].RandState[ last_smple_idx ] != Winner_rand_state ) {
+ psSampleState[ k ][ 0 ].RD_Q10 = SKP_ADD32( psSampleState[ k ][ 0 ].RD_Q10, ( SKP_int32_MAX >> 4 ) );
+ psSampleState[ k ][ 1 ].RD_Q10 = SKP_ADD32( psSampleState[ k ][ 1 ].RD_Q10, ( SKP_int32_MAX >> 4 ) );
+ SKP_assert( psSampleState[ k ][ 0 ].RD_Q10 >= 0 );
+ }
+ }
+
+ /* Find worst in first set and best in second set */
+ RDmax_Q10 = psSampleState[ 0 ][ 0 ].RD_Q10;
+ RDmin_Q10 = psSampleState[ 0 ][ 1 ].RD_Q10;
+ RDmax_ind = 0;
+ RDmin_ind = 0;
+ for( k = 1; k < nStatesDelayedDecision; k++ ) {
+ /* find worst in first set */
+ if( psSampleState[ k ][ 0 ].RD_Q10 > RDmax_Q10 ) {
+ RDmax_Q10 = psSampleState[ k ][ 0 ].RD_Q10;
+ RDmax_ind = k;
+ }
+ /* find best in second set */
+ if( psSampleState[ k ][ 1 ].RD_Q10 < RDmin_Q10 ) {
+ RDmin_Q10 = psSampleState[ k ][ 1 ].RD_Q10;
+ RDmin_ind = k;
+ }
+ }
+
+ /* Replace a state if best from second set outperforms worst in first set */
+ if( RDmin_Q10 < RDmax_Q10 ) {
+ SKP_memcpy( ((SKP_int32 *)&psDelDec[ RDmax_ind ]) + i,
+ ((SKP_int32 *)&psDelDec[ RDmin_ind ]) + i, sizeof( NSQ_del_dec_struct ) - i * sizeof( SKP_int32) );
+ SKP_memcpy( &psSampleState[ RDmax_ind ][ 0 ], &psSampleState[ RDmin_ind ][ 1 ], sizeof( NSQ_sample_struct ) );
+ }
+
+ /* Write samples from winner to output and long-term filter states */
+ psDD = &psDelDec[ Winner_ind ];
+ if( subfr > 0 || i >= decisionDelay ) {
+ pulses[ i - decisionDelay ] = ( SKP_int8 )SKP_RSHIFT_ROUND( psDD->Q_Q10[ last_smple_idx ], 10 );
+ xq[ i - decisionDelay ] = ( SKP_int16 )SKP_SAT16( SKP_RSHIFT_ROUND(
+ SKP_SMULWW( psDD->Xq_Q10[ last_smple_idx ], delayedGain_Q16[ last_smple_idx ] ), 10 ) );
+ NSQ->sLTP_shp_Q10[ NSQ->sLTP_shp_buf_idx - decisionDelay ] = psDD->Shape_Q10[ last_smple_idx ];
+ sLTP_Q16[ NSQ->sLTP_buf_idx - decisionDelay ] = psDD->Pred_Q16[ last_smple_idx ];
+ }
+ NSQ->sLTP_shp_buf_idx++;
+ NSQ->sLTP_buf_idx++;
+
+ /* Update states */
+ for( k = 0; k < nStatesDelayedDecision; k++ ) {
+ psDD = &psDelDec[ k ];
+ psSS = &psSampleState[ k ][ 0 ];
+ psDD->LF_AR_Q12 = psSS->LF_AR_Q12;
+ psDD->sLPC_Q14[ NSQ_LPC_BUF_LENGTH + i ] = psSS->xq_Q14;
+ psDD->Xq_Q10[ *smpl_buf_idx ] = SKP_RSHIFT( psSS->xq_Q14, 4 );
+ psDD->Q_Q10[ *smpl_buf_idx ] = psSS->Q_Q10;
+ psDD->Pred_Q16[ *smpl_buf_idx ] = psSS->LPC_exc_Q16;
+ psDD->Shape_Q10[ *smpl_buf_idx ] = psSS->sLTP_shp_Q10;
+ psDD->Seed = SKP_ADD32( psDD->Seed, SKP_RSHIFT_ROUND( psSS->Q_Q10, 10 ) );
+ psDD->RandState[ *smpl_buf_idx ] = psDD->Seed;
+ psDD->RD_Q10 = psSS->RD_Q10;
+ }
+ delayedGain_Q16[ *smpl_buf_idx ] = Gain_Q16;
+ }
+ /* Update LPC states */
+ for( k = 0; k < nStatesDelayedDecision; k++ ) {
+ psDD = &psDelDec[ k ];
+ SKP_memcpy( psDD->sLPC_Q14, &psDD->sLPC_Q14[ length ], NSQ_LPC_BUF_LENGTH * sizeof( SKP_int32 ) );
+ }
+}
+
+SKP_INLINE void SKP_Silk_nsq_del_dec_scale_states(
+ const SKP_Silk_encoder_state *psEncC, /* I Encoder State */
+ SKP_Silk_nsq_state *NSQ, /* I/O NSQ state */
+ NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */
+ const SKP_int16 x[], /* I Input in Q0 */
+ SKP_int32 x_sc_Q10[], /* O Input scaled with 1/Gain in Q10 */
+ const SKP_int16 sLTP[], /* I Re-whitened LTP state in Q0 */
+ SKP_int32 sLTP_Q16[], /* O LTP state matching scaled input */
+ SKP_int subfr, /* I Subframe number */
+ SKP_int nStatesDelayedDecision, /* I Number of del dec states */
+ SKP_int smpl_buf_idx, /* I Index to newest samples in buffers */
+ const SKP_int LTP_scale_Q14, /* I LTP state scaling */
+ const SKP_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I */
+ const SKP_int pitchL[ MAX_NB_SUBFR ] /* I Pitch lag */
+)
+{
+ SKP_int i, k, lag;
+ SKP_int32 inv_gain_Q16, gain_adj_Q16, inv_gain_Q32;
+ NSQ_del_dec_struct *psDD;
+
+ inv_gain_Q16 = SKP_INVERSE32_varQ( SKP_max( Gains_Q16[ subfr ], 1 ), 32 );
+ inv_gain_Q16 = SKP_min( inv_gain_Q16, SKP_int16_MAX );
+ lag = pitchL[ subfr ];
+
+ /* After rewhitening the LTP state is un-scaled, so scale with inv_gain_Q16 */
+ if( NSQ->rewhite_flag ) {
+ inv_gain_Q32 = SKP_LSHIFT( inv_gain_Q16, 16 );
+ if( subfr == 0 ) {
+ /* Do LTP downscaling */
+ inv_gain_Q32 = SKP_LSHIFT( SKP_SMULWB( inv_gain_Q32, LTP_scale_Q14 ), 2 );
+ }
+ for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx; i++ ) {
+ SKP_assert( i < MAX_FRAME_LENGTH );
+ sLTP_Q16[ i ] = SKP_SMULWB( inv_gain_Q32, sLTP[ i ] );
+ }
+ }
+
+ /* Adjust for changing gain */
+ if( inv_gain_Q16 != NSQ->prev_inv_gain_Q16 ) {
+ gain_adj_Q16 = SKP_DIV32_varQ( inv_gain_Q16, NSQ->prev_inv_gain_Q16, 16 );
+
+ /* Scale long-term shaping state */
+ for( i = NSQ->sLTP_shp_buf_idx - psEncC->ltp_mem_length; i < NSQ->sLTP_shp_buf_idx; i++ ) {
+ NSQ->sLTP_shp_Q10[ i ] = SKP_SMULWW( gain_adj_Q16, NSQ->sLTP_shp_Q10[ i ] );
+ }
+
+ /* Scale long-term prediction state */
+ if( NSQ->rewhite_flag == 0 ) {
+ for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx; i++ ) {
+ sLTP_Q16[ i ] = SKP_SMULWW( gain_adj_Q16, sLTP_Q16[ i ] );
+ }
+ }
+
+ for( k = 0; k < nStatesDelayedDecision; k++ ) {
+ psDD = &psDelDec[ k ];
+
+ /* Scale scalar states */
+ psDD->LF_AR_Q12 = SKP_SMULWW( gain_adj_Q16, psDD->LF_AR_Q12 );
+
+ /* Scale short-term prediction and shaping states */
+ for( i = 0; i < NSQ_LPC_BUF_LENGTH; i++ ) {
+ psDD->sLPC_Q14[ i ] = SKP_SMULWW( gain_adj_Q16, psDD->sLPC_Q14[ i ] );
+ }
+ for( i = 0; i < MAX_SHAPE_LPC_ORDER; i++ ) {
+ psDD->sAR2_Q14[ i ] = SKP_SMULWW( gain_adj_Q16, psDD->sAR2_Q14[ i ] );
+ }
+ for( i = 0; i < DECISION_DELAY; i++ ) {
+ psDD->Pred_Q16[ i ] = SKP_SMULWW( gain_adj_Q16, psDD->Pred_Q16[ i ] );
+ psDD->Shape_Q10[ i ] = SKP_SMULWW( gain_adj_Q16, psDD->Shape_Q10[ i ] );
+ }
+ }
+ }
+
+ /* Scale input */
+ for( i = 0; i < psEncC->subfr_length; i++ ) {
+ x_sc_Q10[ i ] = SKP_RSHIFT( SKP_SMULBB( x[ i ], ( SKP_int16 )inv_gain_Q16 ), 6 );
+ }
+
+ /* save inv_gain */
+ SKP_assert( inv_gain_Q16 != 0 );
+ NSQ->prev_inv_gain_Q16 = inv_gain_Q16;
+}
--- /dev/null
+++ b/src_common/SKP_Silk_PLC.c
@@ -1,0 +1,388 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+#include "SKP_Silk_PLC.h"
+
+#define NB_ATT 2
+static const SKP_int16 HARM_ATT_Q15[NB_ATT] = { 32440, 31130 }; /* 0.99, 0.95 */
+static const SKP_int16 PLC_RAND_ATTENUATE_V_Q15[NB_ATT] = { 31130, 26214 }; /* 0.95, 0.8 */
+static const SKP_int16 PLC_RAND_ATTENUATE_UV_Q15[NB_ATT] = { 32440, 29491 }; /* 0.99, 0.9 */
+
+void SKP_Silk_PLC_Reset(
+ SKP_Silk_decoder_state *psDec /* I/O Decoder state */
+)
+{
+ psDec->sPLC.pitchL_Q8 = SKP_RSHIFT( psDec->frame_length, 1 );
+}
+
+void SKP_Silk_PLC(
+ SKP_Silk_decoder_state *psDec, /* I Decoder state */
+ SKP_Silk_decoder_control *psDecCtrl, /* I Decoder control */
+ SKP_int16 signal[], /* O Concealed signal */
+ SKP_int length, /* I length of residual */
+ SKP_int lost /* I Loss flag */
+)
+{
+ /* PLC control function */
+ if( psDec->fs_kHz != psDec->sPLC.fs_kHz ) {
+ SKP_Silk_PLC_Reset( psDec );
+ psDec->sPLC.fs_kHz = psDec->fs_kHz;
+ }
+
+ if( lost ) {
+ /****************************/
+ /* Generate Signal */
+ /****************************/
+ SKP_Silk_PLC_conceal( psDec, psDecCtrl, signal, length );
+
+ psDec->lossCnt++;
+ } else {
+ /****************************/
+ /* Update state */
+ /****************************/
+ SKP_Silk_PLC_update( psDec, psDecCtrl, signal, length );
+ }
+}
+
+/**************************************************/
+/* Update state of PLC */
+/**************************************************/
+void SKP_Silk_PLC_update(
+ SKP_Silk_decoder_state *psDec, /* (I/O) Decoder state */
+ SKP_Silk_decoder_control *psDecCtrl, /* (I/O) Decoder control */
+ SKP_int16 signal[],
+ SKP_int length
+)
+{
+ SKP_int32 LTP_Gain_Q14, temp_LTP_Gain_Q14;
+ SKP_int i, j;
+ SKP_Silk_PLC_struct *psPLC;
+
+ psPLC = &psDec->sPLC;
+
+ /* Update parameters used in case of packet loss */
+ psDec->prevSignalType = psDec->indices.signalType;
+ LTP_Gain_Q14 = 0;
+ if( psDec->indices.signalType == TYPE_VOICED ) {
+ /* Find the parameters for the last subframe which contains a pitch pulse */
+ for( j = 0; j * psDec->subfr_length < psDecCtrl->pitchL[ psDec->nb_subfr - 1 ]; j++ ) {
+ if( j == psDec->nb_subfr ){
+ break;
+ }
+ temp_LTP_Gain_Q14 = 0;
+ for( i = 0; i < LTP_ORDER; i++ ) {
+ temp_LTP_Gain_Q14 += psDecCtrl->LTPCoef_Q14[ ( psDec->nb_subfr - 1 - j ) * LTP_ORDER + i ];
+ }
+ if( temp_LTP_Gain_Q14 > LTP_Gain_Q14 ) {
+ LTP_Gain_Q14 = temp_LTP_Gain_Q14;
+ SKP_memcpy( psPLC->LTPCoef_Q14,
+ &psDecCtrl->LTPCoef_Q14[ SKP_SMULBB( psDec->nb_subfr - 1 - j, LTP_ORDER ) ],
+ LTP_ORDER * sizeof( SKP_int16 ) );
+
+ psPLC->pitchL_Q8 = SKP_LSHIFT( psDecCtrl->pitchL[ psDec->nb_subfr - 1 - j ], 8 );
+ }
+ }
+
+#if USE_SINGLE_TAP
+ SKP_memset( psPLC->LTPCoef_Q14, 0, LTP_ORDER * sizeof( SKP_int16 ) );
+ psPLC->LTPCoef_Q14[ LTP_ORDER / 2 ] = LTP_Gain_Q14;
+#endif
+
+ /* Limit LT coefs */
+ if( LTP_Gain_Q14 < V_PITCH_GAIN_START_MIN_Q14 ) {
+ SKP_int scale_Q10;
+ SKP_int32 tmp;
+
+ tmp = SKP_LSHIFT( V_PITCH_GAIN_START_MIN_Q14, 10 );
+ scale_Q10 = SKP_DIV32( tmp, SKP_max( LTP_Gain_Q14, 1 ) );
+ for( i = 0; i < LTP_ORDER; i++ ) {
+ psPLC->LTPCoef_Q14[ i ] = SKP_RSHIFT( SKP_SMULBB( psPLC->LTPCoef_Q14[ i ], scale_Q10 ), 10 );
+ }
+ } else if( LTP_Gain_Q14 > V_PITCH_GAIN_START_MAX_Q14 ) {
+ SKP_int scale_Q14;
+ SKP_int32 tmp;
+
+ tmp = SKP_LSHIFT( V_PITCH_GAIN_START_MAX_Q14, 14 );
+ scale_Q14 = SKP_DIV32( tmp, SKP_max( LTP_Gain_Q14, 1 ) );
+ for( i = 0; i < LTP_ORDER; i++ ) {
+ psPLC->LTPCoef_Q14[ i ] = SKP_RSHIFT( SKP_SMULBB( psPLC->LTPCoef_Q14[ i ], scale_Q14 ), 14 );
+ }
+ }
+ } else {
+ psPLC->pitchL_Q8 = SKP_LSHIFT( SKP_SMULBB( psDec->fs_kHz, 18 ), 8 );
+ SKP_memset( psPLC->LTPCoef_Q14, 0, LTP_ORDER * sizeof( SKP_int16 ));
+ }
+
+ /* Save LPC coeficients */
+ SKP_memcpy( psPLC->prevLPC_Q12, psDecCtrl->PredCoef_Q12[ 1 ], psDec->LPC_order * sizeof( SKP_int16 ) );
+ psPLC->prevLTP_scale_Q14 = psDecCtrl->LTP_scale_Q14;
+
+ /* Save Gains */
+ SKP_memcpy( psPLC->prevGain_Q16, psDecCtrl->Gains_Q16, psDec->nb_subfr * sizeof( SKP_int32 ) );
+}
+
+void SKP_Silk_PLC_conceal(
+ SKP_Silk_decoder_state *psDec, /* I/O Decoder state */
+ SKP_Silk_decoder_control *psDecCtrl, /* I/O Decoder control */
+ SKP_int16 signal[], /* O concealed signal */
+ SKP_int length /* I length of residual */
+)
+{
+ SKP_int i, j, k;
+ SKP_int16 *B_Q14, exc_buf[ MAX_FRAME_LENGTH ], *exc_buf_ptr;
+ SKP_int16 rand_scale_Q14, A_Q12_tmp[ MAX_LPC_ORDER ];
+ SKP_int32 rand_seed, harm_Gain_Q15, rand_Gain_Q15;
+ SKP_int lag, idx, sLTP_buf_idx, shift1, shift2;
+ SKP_int32 energy1, energy2, *rand_ptr, *pred_lag_ptr;
+ SKP_int32 sig_Q10[ MAX_FRAME_LENGTH ], *sig_Q10_ptr, LPC_exc_Q10, LPC_pred_Q10, LTP_pred_Q14;
+ SKP_Silk_PLC_struct *psPLC;
+ psPLC = &psDec->sPLC;
+
+ /* Update LTP buffer */
+ SKP_memmove( psDec->sLTP_Q16, &psDec->sLTP_Q16[ psDec->frame_length ], psDec->ltp_mem_length * sizeof( SKP_int32 ) );
+
+ /* LPC concealment. Apply BWE to previous LPC */
+ SKP_Silk_bwexpander( psPLC->prevLPC_Q12, psDec->LPC_order, SKP_FIX_CONST( BWE_COEF, 16 ) );
+
+ /* Find random noise component */
+ /* Scale previous excitation signal */
+ exc_buf_ptr = exc_buf;
+ for( k = ( psDec->nb_subfr >> 1 ); k < psDec->nb_subfr; k++ ) {
+ for( i = 0; i < psDec->subfr_length; i++ ) {
+ exc_buf_ptr[ i ] = ( SKP_int16 )SKP_RSHIFT(
+ SKP_SMULWW( psDec->exc_Q10[ i + k * psDec->subfr_length ], psPLC->prevGain_Q16[ k ] ), 10 );
+ }
+ exc_buf_ptr += psDec->subfr_length;
+ }
+ /* Find the subframe with lowest energy of the last two and use that as random noise generator */
+ SKP_Silk_sum_sqr_shift( &energy1, &shift1, exc_buf, psDec->subfr_length );
+ SKP_Silk_sum_sqr_shift( &energy2, &shift2, &exc_buf[ psDec->subfr_length ], psDec->subfr_length );
+
+ if( SKP_RSHIFT( energy1, shift2 ) < SKP_RSHIFT( energy2, shift1 ) ) {
+ /* First sub-frame has lowest energy */
+ rand_ptr = &psDec->exc_Q10[ SKP_max_int( 0, 3 * psDec->subfr_length - RAND_BUF_SIZE ) ];
+ } else {
+ /* Second sub-frame has lowest energy */
+ rand_ptr = &psDec->exc_Q10[ SKP_max_int( 0, psDec->frame_length - RAND_BUF_SIZE ) ];
+ }
+
+ /* Setup Gain to random noise component */
+ B_Q14 = psPLC->LTPCoef_Q14;
+ rand_scale_Q14 = psPLC->randScale_Q14;
+
+ /* Setup attenuation gains */
+ harm_Gain_Q15 = HARM_ATT_Q15[ SKP_min_int( NB_ATT - 1, psDec->lossCnt ) ];
+ if( psDec->prevSignalType == TYPE_VOICED ) {
+ rand_Gain_Q15 = PLC_RAND_ATTENUATE_V_Q15[ SKP_min_int( NB_ATT - 1, psDec->lossCnt ) ];
+ } else {
+ rand_Gain_Q15 = PLC_RAND_ATTENUATE_UV_Q15[ SKP_min_int( NB_ATT - 1, psDec->lossCnt ) ];
+ }
+
+ /* First Lost frame */
+ if( psDec->lossCnt == 0 ) {
+ rand_scale_Q14 = 1 << 14;
+
+ /* Reduce random noise Gain for voiced frames */
+ if( psDec->prevSignalType == TYPE_VOICED ) {
+ for( i = 0; i < LTP_ORDER; i++ ) {
+ rand_scale_Q14 -= B_Q14[ i ];
+ }
+ rand_scale_Q14 = SKP_max_16( 3277, rand_scale_Q14 ); /* 0.2 */
+ rand_scale_Q14 = ( SKP_int16 )SKP_RSHIFT( SKP_SMULBB( rand_scale_Q14, psPLC->prevLTP_scale_Q14 ), 14 );
+ } else {
+ /* Reduce random noise for unvoiced frames with high LPC gain */
+ SKP_int32 invGain_Q30, down_scale_Q30;
+
+ SKP_Silk_LPC_inverse_pred_gain( &invGain_Q30, psPLC->prevLPC_Q12, psDec->LPC_order );
+
+ down_scale_Q30 = SKP_min_32( SKP_RSHIFT( 1 << 30, LOG2_INV_LPC_GAIN_HIGH_THRES ), invGain_Q30 );
+ down_scale_Q30 = SKP_max_32( SKP_RSHIFT( 1 << 30, LOG2_INV_LPC_GAIN_LOW_THRES ), down_scale_Q30 );
+ down_scale_Q30 = SKP_LSHIFT( down_scale_Q30, LOG2_INV_LPC_GAIN_HIGH_THRES );
+
+ rand_Gain_Q15 = SKP_RSHIFT( SKP_SMULWB( down_scale_Q30, rand_Gain_Q15 ), 14 );
+ }
+ }
+
+ rand_seed = psPLC->rand_seed;
+ lag = SKP_RSHIFT_ROUND( psPLC->pitchL_Q8, 8 );
+ sLTP_buf_idx = psDec->ltp_mem_length;
+
+ /***************************/
+ /* LTP synthesis filtering */
+ /***************************/
+ sig_Q10_ptr = sig_Q10;
+ for( k = 0; k < psDec->nb_subfr; k++ ) {
+ /* Setup pointer */
+ pred_lag_ptr = &psDec->sLTP_Q16[ sLTP_buf_idx - lag + LTP_ORDER / 2 ];
+ for( i = 0; i < psDec->subfr_length; i++ ) {
+ rand_seed = SKP_RAND( rand_seed );
+ idx = SKP_RSHIFT( rand_seed, 25 ) & RAND_BUF_MASK;
+
+ /* Unrolled loop */
+ LTP_pred_Q14 = SKP_SMULWB( pred_lag_ptr[ 0 ], B_Q14[ 0 ] );
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -1 ], B_Q14[ 1 ] );
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -2 ], B_Q14[ 2 ] );
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -3 ], B_Q14[ 3 ] );
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -4 ], B_Q14[ 4 ] );
+ pred_lag_ptr++;
+
+ /* Generate LPC residual */
+ LPC_exc_Q10 = SKP_LSHIFT( SKP_SMULWB( rand_ptr[ idx ], rand_scale_Q14 ), 2 ); /* Random noise part */
+ LPC_exc_Q10 = SKP_ADD32( LPC_exc_Q10, SKP_RSHIFT_ROUND( LTP_pred_Q14, 4 ) ); /* Harmonic part */
+
+ /* Update states */
+ psDec->sLTP_Q16[ sLTP_buf_idx ] = SKP_LSHIFT( LPC_exc_Q10, 6 );
+ sLTP_buf_idx++;
+
+ /* Save LPC residual */
+ sig_Q10_ptr[ i ] = LPC_exc_Q10;
+ }
+ sig_Q10_ptr += psDec->subfr_length;
+ /* Gradually reduce LTP gain */
+ for( j = 0; j < LTP_ORDER; j++ ) {
+ B_Q14[ j ] = SKP_RSHIFT( SKP_SMULBB( harm_Gain_Q15, B_Q14[ j ] ), 15 );
+ }
+ /* Gradually reduce excitation gain */
+ rand_scale_Q14 = SKP_RSHIFT( SKP_SMULBB( rand_scale_Q14, rand_Gain_Q15 ), 15 );
+
+ /* Slowly increase pitch lag */
+ psPLC->pitchL_Q8 += SKP_SMULWB( psPLC->pitchL_Q8, PITCH_DRIFT_FAC_Q16 );
+ psPLC->pitchL_Q8 = SKP_min_32( psPLC->pitchL_Q8, SKP_LSHIFT( SKP_SMULBB( MAX_PITCH_LAG_MS, psDec->fs_kHz ), 8 ) );
+ lag = SKP_RSHIFT_ROUND( psPLC->pitchL_Q8, 8 );
+ }
+
+ /***************************/
+ /* LPC synthesis filtering */
+ /***************************/
+ sig_Q10_ptr = sig_Q10;
+ /* Preload LPC coeficients to array on stack. Gives small performance gain */
+ SKP_memcpy( A_Q12_tmp, psPLC->prevLPC_Q12, psDec->LPC_order * sizeof( SKP_int16 ) );
+ SKP_assert( psDec->LPC_order >= 10 ); /* check that unrolling works */
+ for( k = 0; k < psDec->nb_subfr; k++ ) {
+ for( i = 0; i < psDec->subfr_length; i++ ){
+ /* partly unrolled */
+ LPC_pred_Q10 = SKP_SMULWB( psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 1 ], A_Q12_tmp[ 0 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 2 ], A_Q12_tmp[ 1 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 3 ], A_Q12_tmp[ 2 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 4 ], A_Q12_tmp[ 3 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 5 ], A_Q12_tmp[ 4 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 6 ], A_Q12_tmp[ 5 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 7 ], A_Q12_tmp[ 6 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 8 ], A_Q12_tmp[ 7 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 9 ], A_Q12_tmp[ 8 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 10 ], A_Q12_tmp[ 9 ] );
+
+ for( j = 10; j < psDec->LPC_order; j++ ) {
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - j - 1 ], A_Q12_tmp[ j ] );
+ }
+
+ /* Add prediction to LPC residual */
+ sig_Q10_ptr[ i ] = SKP_ADD32( sig_Q10_ptr[ i ], LPC_pred_Q10 );
+
+ /* Update states */
+ psDec->sLPC_Q14[ MAX_LPC_ORDER + i ] = SKP_LSHIFT( sig_Q10_ptr[ i ], 4 );
+ }
+ sig_Q10_ptr += psDec->subfr_length;
+ /* Update LPC filter state */
+ SKP_memcpy( psDec->sLPC_Q14, &psDec->sLPC_Q14[ psDec->subfr_length ], MAX_LPC_ORDER * sizeof( SKP_int32 ) );
+ }
+
+ /* Scale with Gain */
+ for( i = 0; i < psDec->frame_length; i++ ) {
+ signal[ i ] = ( SKP_int16 )SKP_SAT16( SKP_RSHIFT_ROUND( SKP_SMULWW( sig_Q10[ i ], psPLC->prevGain_Q16[ psDec->nb_subfr - 1 ] ), 10 ) );
+ }
+
+ /**************************************/
+ /* Update states */
+ /**************************************/
+ psPLC->rand_seed = rand_seed;
+ psPLC->randScale_Q14 = rand_scale_Q14;
+ for( i = 0; i < MAX_NB_SUBFR; i++ ) {
+ psDecCtrl->pitchL[ i ] = lag;
+ }
+}
+
+/* Glues concealed frames with new good recieved frames */
+void SKP_Silk_PLC_glue_frames(
+ SKP_Silk_decoder_state *psDec, /* I/O decoder state */
+ SKP_Silk_decoder_control *psDecCtrl, /* I/O Decoder control */
+ SKP_int16 signal[], /* I/O signal */
+ SKP_int length /* I length of residual */
+)
+{
+ SKP_int i, energy_shift;
+ SKP_int32 energy;
+ SKP_Silk_PLC_struct *psPLC;
+ psPLC = &psDec->sPLC;
+
+ if( psDec->lossCnt ) {
+ /* Calculate energy in concealed residual */
+ SKP_Silk_sum_sqr_shift( &psPLC->conc_energy, &psPLC->conc_energy_shift, signal, length );
+
+ psPLC->last_frame_lost = 1;
+ } else {
+ if( psDec->sPLC.last_frame_lost ) {
+ /* Calculate residual in decoded signal if last frame was lost */
+ SKP_Silk_sum_sqr_shift( &energy, &energy_shift, signal, length );
+
+ /* Normalize energies */
+ if( energy_shift > psPLC->conc_energy_shift ) {
+ psPLC->conc_energy = SKP_RSHIFT( psPLC->conc_energy, energy_shift - psPLC->conc_energy_shift );
+ } else if( energy_shift < psPLC->conc_energy_shift ) {
+ energy = SKP_RSHIFT( energy, psPLC->conc_energy_shift - energy_shift );
+ }
+
+ /* Fade in the energy difference */
+ if( energy > psPLC->conc_energy ) {
+ SKP_int32 frac_Q24, LZ;
+ SKP_int32 gain_Q16, slope_Q16;
+
+ LZ = SKP_Silk_CLZ32( psPLC->conc_energy );
+ LZ = LZ - 1;
+ psPLC->conc_energy = SKP_LSHIFT( psPLC->conc_energy, LZ );
+ energy = SKP_RSHIFT( energy, SKP_max_32( 24 - LZ, 0 ) );
+
+ frac_Q24 = SKP_DIV32( psPLC->conc_energy, SKP_max( energy, 1 ) );
+
+ gain_Q16 = SKP_LSHIFT( SKP_Silk_SQRT_APPROX( frac_Q24 ), 4 );
+ slope_Q16 = SKP_DIV32_16( ( 1 << 16 ) - gain_Q16, length );
+ /* Make slope 4x steeper to avoid missing onsets after DTX */
+ slope_Q16 = SKP_LSHIFT( slope_Q16, 2 );
+
+ for( i = 0; i < length; i++ ) {
+ signal[ i ] = SKP_SMULWB( gain_Q16, signal[ i ] );
+ gain_Q16 += slope_Q16;
+ if( gain_Q16 > 1 << 16 ) {
+ break;
+ }
+ }
+ }
+ }
+ psPLC->last_frame_lost = 0;
+ }
+}
--- /dev/null
+++ b/src_common/SKP_Silk_PLC.h
@@ -1,0 +1,79 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef SKP_SILK_PLC_FIX_H
+#define SKP_SILK_PLC_FIX_H
+
+#include "SKP_Silk_main.h"
+
+#define BWE_COEF 0.99
+#define V_PITCH_GAIN_START_MIN_Q14 11469 /* 0.7 in Q14 */
+#define V_PITCH_GAIN_START_MAX_Q14 15565 /* 0.95 in Q14 */
+#define MAX_PITCH_LAG_MS 18
+#define SA_THRES_Q8 50
+#define USE_SINGLE_TAP 1
+#define RAND_BUF_SIZE 128
+#define RAND_BUF_MASK (RAND_BUF_SIZE - 1)
+#define LOG2_INV_LPC_GAIN_HIGH_THRES 3 /* 2^3 = 8 dB LPC gain */
+#define LOG2_INV_LPC_GAIN_LOW_THRES 8 /* 2^8 = 24 dB LPC gain */
+#define PITCH_DRIFT_FAC_Q16 655 /* 0.01 in Q16 */
+
+void SKP_Silk_PLC_Reset(
+ SKP_Silk_decoder_state *psDec /* I/O Decoder state */
+);
+
+void SKP_Silk_PLC(
+ SKP_Silk_decoder_state *psDec, /* I/O Decoder state */
+ SKP_Silk_decoder_control *psDecCtrl, /* I/O Decoder control */
+ SKP_int16 signal[], /* I/O signal */
+ SKP_int length, /* I length of residual */
+ SKP_int lost /* I Loss flag */
+);
+
+void SKP_Silk_PLC_update(
+ SKP_Silk_decoder_state *psDec, /* I/O Decoder state */
+ SKP_Silk_decoder_control *psDecCtrl, /* I/O Decoder control */
+ SKP_int16 signal[],
+ SKP_int length
+);
+
+void SKP_Silk_PLC_conceal(
+ SKP_Silk_decoder_state *psDec, /* I/O Decoder state */
+ SKP_Silk_decoder_control *psDecCtrl, /* I/O Decoder control */
+ SKP_int16 signal[], /* O LPC residual signal */
+ SKP_int length /* I length of signal */
+);
+
+void SKP_Silk_PLC_glue_frames(
+ SKP_Silk_decoder_state *psDec, /* I/O decoder state */
+ SKP_Silk_decoder_control *psDecCtrl, /* I/O Decoder control */
+ SKP_int16 signal[], /* I/O signal */
+ SKP_int length /* I length of signal */
+);
+
+#endif
+
--- /dev/null
+++ b/src_common/SKP_Silk_VAD.c
@@ -1,0 +1,321 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include <stdlib.h>
+#include "SKP_Silk_main.h"
+
+/**********************************/
+/* Initialization of the Silk VAD */
+/**********************************/
+SKP_int SKP_Silk_VAD_Init( /* O Return value, 0 if success */
+ SKP_Silk_VAD_state *psSilk_VAD /* I/O Pointer to Silk VAD state */
+)
+{
+ SKP_int b, ret = 0;
+
+ /* reset state memory */
+ SKP_memset( psSilk_VAD, 0, sizeof( SKP_Silk_VAD_state ) );
+
+ /* init noise levels */
+ /* Initialize array with approx pink noise levels (psd proportional to inverse of frequency) */
+ for( b = 0; b < VAD_N_BANDS; b++ ) {
+ psSilk_VAD->NoiseLevelBias[ b ] = SKP_max_32( SKP_DIV32_16( VAD_NOISE_LEVELS_BIAS, b + 1 ), 1 );
+ }
+
+ /* Initialize state */
+ for( b = 0; b < VAD_N_BANDS; b++ ) {
+ psSilk_VAD->NL[ b ] = SKP_MUL( 100, psSilk_VAD->NoiseLevelBias[ b ] );
+ psSilk_VAD->inv_NL[ b ] = SKP_DIV32( SKP_int32_MAX, psSilk_VAD->NL[ b ] );
+ }
+ psSilk_VAD->counter = 15;
+
+ /* init smoothed energy-to-noise ratio*/
+ for( b = 0; b < VAD_N_BANDS; b++ ) {
+ psSilk_VAD->NrgRatioSmth_Q8[ b ] = 100 * 256; /* 100 * 256 --> 20 dB SNR */
+ }
+
+ return( ret );
+}
+
+/* Weighting factors for tilt measure */
+const static SKP_int32 tiltWeights[ VAD_N_BANDS ] = { 30000, 6000, -12000, -12000 };
+
+/***************************************/
+/* Get the speech activity level in Q8 */
+/***************************************/
+SKP_int SKP_Silk_VAD_GetSA_Q8( /* O Return value, 0 if success */
+ SKP_Silk_encoder_state *psEncC, /* I/O Encoder state */
+ const SKP_int16 pIn[] /* I PCM input */
+)
+{
+ SKP_int SA_Q15, pSNR_dB_Q7, input_tilt;
+ SKP_int decimated_framelength, dec_subframe_length, dec_subframe_offset, SNR_Q7, i, b, s;
+ SKP_int32 sumSquared, smooth_coef_Q16;
+ SKP_int16 HPstateTmp;
+ SKP_int16 X[ VAD_N_BANDS ][ MAX_FRAME_LENGTH / 2 ];
+ SKP_int32 Xnrg[ VAD_N_BANDS ];
+ SKP_int32 NrgToNoiseRatio_Q8[ VAD_N_BANDS ];
+ SKP_int32 speech_nrg, x_tmp;
+ SKP_int ret = 0;
+ SKP_Silk_VAD_state *psSilk_VAD = &psEncC->sVAD;
+
+ /* Safety checks */
+ SKP_assert( VAD_N_BANDS == 4 );
+ SKP_assert( MAX_FRAME_LENGTH >= psEncC->frame_length );
+ SKP_assert( psEncC->frame_length <= 512 );
+ SKP_assert( psEncC->frame_length == 8 * SKP_RSHIFT( psEncC->frame_length, 3 ) );
+
+ /***********************/
+ /* Filter and Decimate */
+ /***********************/
+ /* 0-8 kHz to 0-4 kHz and 4-8 kHz */
+ SKP_Silk_ana_filt_bank_1( pIn, &psSilk_VAD->AnaState[ 0 ], &X[ 0 ][ 0 ], &X[ 3 ][ 0 ], psEncC->frame_length );
+
+ /* 0-4 kHz to 0-2 kHz and 2-4 kHz */
+ SKP_Silk_ana_filt_bank_1( &X[ 0 ][ 0 ], &psSilk_VAD->AnaState1[ 0 ], &X[ 0 ][ 0 ], &X[ 2 ][ 0 ], SKP_RSHIFT( psEncC->frame_length, 1 ) );
+
+ /* 0-2 kHz to 0-1 kHz and 1-2 kHz */
+ SKP_Silk_ana_filt_bank_1( &X[ 0 ][ 0 ], &psSilk_VAD->AnaState2[ 0 ], &X[ 0 ][ 0 ], &X[ 1 ][ 0 ], SKP_RSHIFT( psEncC->frame_length, 2 ) );
+
+ /*********************************************/
+ /* HP filter on lowest band (differentiator) */
+ /*********************************************/
+ decimated_framelength = SKP_RSHIFT( psEncC->frame_length, 3 );
+ X[ 0 ][ decimated_framelength - 1 ] = SKP_RSHIFT( X[ 0 ][ decimated_framelength - 1 ], 1 );
+ HPstateTmp = X[ 0 ][ decimated_framelength - 1 ];
+ for( i = decimated_framelength - 1; i > 0; i-- ) {
+ X[ 0 ][ i - 1 ] = SKP_RSHIFT( X[ 0 ][ i - 1 ], 1 );
+ X[ 0 ][ i ] -= X[ 0 ][ i - 1 ];
+ }
+ X[ 0 ][ 0 ] -= psSilk_VAD->HPstate;
+ psSilk_VAD->HPstate = HPstateTmp;
+
+ /*************************************/
+ /* Calculate the energy in each band */
+ /*************************************/
+ for( b = 0; b < VAD_N_BANDS; b++ ) {
+ /* Find the decimated framelength in the non-uniformly divided bands */
+ decimated_framelength = SKP_RSHIFT( psEncC->frame_length, SKP_min_int( VAD_N_BANDS - b, VAD_N_BANDS - 1 ) );
+
+ /* Split length into subframe lengths */
+ dec_subframe_length = SKP_RSHIFT( decimated_framelength, VAD_INTERNAL_SUBFRAMES_LOG2 );
+ dec_subframe_offset = 0;
+
+ /* Compute energy per sub-frame */
+ /* initialize with summed energy of last subframe */
+ Xnrg[ b ] = psSilk_VAD->XnrgSubfr[ b ];
+ for( s = 0; s < VAD_INTERNAL_SUBFRAMES; s++ ) {
+ sumSquared = 0;
+ for( i = 0; i < dec_subframe_length; i++ ) {
+ /* The energy will be less than dec_subframe_length * ( SKP_int16_MIN / 8 ) ^ 2. */
+ /* Therefore we can accumulate with no risk of overflow (unless dec_subframe_length > 128) */
+ x_tmp = SKP_RSHIFT( X[ b ][ i + dec_subframe_offset ], 3 );
+ sumSquared = SKP_SMLABB( sumSquared, x_tmp, x_tmp );
+
+ /* Safety check */
+ SKP_assert( sumSquared >= 0 );
+ }
+
+ /* Add/saturate summed energy of current subframe */
+ if( s < VAD_INTERNAL_SUBFRAMES - 1 ) {
+ Xnrg[ b ] = SKP_ADD_POS_SAT32( Xnrg[ b ], sumSquared );
+ } else {
+ /* Look-ahead subframe */
+ Xnrg[ b ] = SKP_ADD_POS_SAT32( Xnrg[ b ], SKP_RSHIFT( sumSquared, 1 ) );
+ }
+
+ dec_subframe_offset += dec_subframe_length;
+ }
+ psSilk_VAD->XnrgSubfr[ b ] = sumSquared;
+ }
+
+ /********************/
+ /* Noise estimation */
+ /********************/
+ SKP_Silk_VAD_GetNoiseLevels( &Xnrg[ 0 ], psSilk_VAD );
+
+ /***********************************************/
+ /* Signal-plus-noise to noise ratio estimation */
+ /***********************************************/
+ sumSquared = 0;
+ input_tilt = 0;
+ for( b = 0; b < VAD_N_BANDS; b++ ) {
+ speech_nrg = Xnrg[ b ] - psSilk_VAD->NL[ b ];
+ if( speech_nrg > 0 ) {
+ /* Divide, with sufficient resolution */
+ if( ( Xnrg[ b ] & 0xFF800000 ) == 0 ) {
+ NrgToNoiseRatio_Q8[ b ] = SKP_DIV32( SKP_LSHIFT( Xnrg[ b ], 8 ), psSilk_VAD->NL[ b ] + 1 );
+ } else {
+ NrgToNoiseRatio_Q8[ b ] = SKP_DIV32( Xnrg[ b ], SKP_RSHIFT( psSilk_VAD->NL[ b ], 8 ) + 1 );
+ }
+
+ /* Convert to log domain */
+ SNR_Q7 = SKP_Silk_lin2log( NrgToNoiseRatio_Q8[ b ] ) - 8 * 128;
+
+ /* Sum-of-squares */
+ sumSquared = SKP_SMLABB( sumSquared, SNR_Q7, SNR_Q7 ); /* Q14 */
+
+ /* Tilt measure */
+ if( speech_nrg < ( 1 << 20 ) ) {
+ /* Scale down SNR value for small subband speech energies */
+ SNR_Q7 = SKP_SMULWB( SKP_LSHIFT( SKP_Silk_SQRT_APPROX( speech_nrg ), 6 ), SNR_Q7 );
+ }
+ input_tilt = SKP_SMLAWB( input_tilt, tiltWeights[ b ], SNR_Q7 );
+ } else {
+ NrgToNoiseRatio_Q8[ b ] = 256;
+ }
+ }
+
+ /* Mean-of-squares */
+ sumSquared = SKP_DIV32_16( sumSquared, VAD_N_BANDS ); /* Q14 */
+
+ /* Root-mean-square approximation, scale to dBs, and write to output pointer */
+ pSNR_dB_Q7 = ( SKP_int16 )( 3 * SKP_Silk_SQRT_APPROX( sumSquared ) ); /* Q7 */
+
+ /*********************************/
+ /* Speech Probability Estimation */
+ /*********************************/
+ SA_Q15 = SKP_Silk_sigm_Q15( SKP_SMULWB( VAD_SNR_FACTOR_Q16, pSNR_dB_Q7 ) - VAD_NEGATIVE_OFFSET_Q5 );
+
+ /**************************/
+ /* Frequency Tilt Measure */
+ /**************************/
+ psEncC->input_tilt_Q15 = SKP_LSHIFT( SKP_Silk_sigm_Q15( input_tilt ) - 16384, 1 );
+
+ /**************************************************/
+ /* Scale the sigmoid output based on power levels */
+ /**************************************************/
+ speech_nrg = 0;
+ for( b = 0; b < VAD_N_BANDS; b++ ) {
+ /* Accumulate signal-without-noise energies, higher frequency bands have more weight */
+ speech_nrg += ( b + 1 ) * SKP_RSHIFT( Xnrg[ b ] - psSilk_VAD->NL[ b ], 4 );
+ }
+
+ /* Power scaling */
+ if( speech_nrg <= 0 ) {
+ SA_Q15 = SKP_RSHIFT( SA_Q15, 1 );
+ } else if( speech_nrg < 32768 ) {
+ if( psEncC->frame_length == 10 * psEncC->fs_kHz ) {
+ speech_nrg = SKP_LSHIFT_SAT32( speech_nrg, 16 );
+ } else {
+ speech_nrg = SKP_LSHIFT_SAT32( speech_nrg, 15 );
+ }
+
+ /* square-root */
+ speech_nrg = SKP_Silk_SQRT_APPROX( speech_nrg );
+ SA_Q15 = SKP_SMULWB( 32768 + speech_nrg, SA_Q15 );
+ }
+
+ /* Copy the resulting speech activity in Q8 */
+ psEncC->speech_activity_Q8 = SKP_min_int( SKP_RSHIFT( SA_Q15, 7 ), SKP_uint8_MAX );
+
+ /***********************************/
+ /* Energy Level and SNR estimation */
+ /***********************************/
+ /* Smoothing coefficient */
+ smooth_coef_Q16 = SKP_SMULWB( VAD_SNR_SMOOTH_COEF_Q18, SKP_SMULWB( SA_Q15, SA_Q15 ) );
+
+ if( psEncC->frame_length == 10 * psEncC->fs_kHz ) {
+ smooth_coef_Q16 >>= 1;
+ }
+
+ for( b = 0; b < VAD_N_BANDS; b++ ) {
+ /* compute smoothed energy-to-noise ratio per band */
+ psSilk_VAD->NrgRatioSmth_Q8[ b ] = SKP_SMLAWB( psSilk_VAD->NrgRatioSmth_Q8[ b ],
+ NrgToNoiseRatio_Q8[ b ] - psSilk_VAD->NrgRatioSmth_Q8[ b ], smooth_coef_Q16 );
+
+ /* signal to noise ratio in dB per band */
+ SNR_Q7 = 3 * ( SKP_Silk_lin2log( psSilk_VAD->NrgRatioSmth_Q8[b] ) - 8 * 128 );
+ /* quality = sigmoid( 0.25 * ( SNR_dB - 16 ) ); */
+ psEncC->input_quality_bands_Q15[ b ] = SKP_Silk_sigm_Q15( SKP_RSHIFT( SNR_Q7 - 16 * 128, 4 ) );
+ }
+
+ return( ret );
+}
+
+/**************************/
+/* Noise level estimation */
+/**************************/
+void SKP_Silk_VAD_GetNoiseLevels(
+ const SKP_int32 pX[ VAD_N_BANDS ], /* I subband energies */
+ SKP_Silk_VAD_state *psSilk_VAD /* I/O Pointer to Silk VAD state */
+)
+{
+ SKP_int k;
+ SKP_int32 nl, nrg, inv_nrg;
+ SKP_int coef, min_coef;
+
+ /* Initially faster smoothing */
+ if( psSilk_VAD->counter < 1000 ) { /* 1000 = 20 sec */
+ min_coef = SKP_DIV32_16( SKP_int16_MAX, SKP_RSHIFT( psSilk_VAD->counter, 4 ) + 1 );
+ } else {
+ min_coef = 0;
+ }
+
+ for( k = 0; k < VAD_N_BANDS; k++ ) {
+ /* Get old noise level estimate for current band */
+ nl = psSilk_VAD->NL[ k ];
+ SKP_assert( nl >= 0 );
+
+ /* Add bias */
+ nrg = SKP_ADD_POS_SAT32( pX[ k ], psSilk_VAD->NoiseLevelBias[ k ] );
+ SKP_assert( nrg > 0 );
+
+ /* Invert energies */
+ inv_nrg = SKP_DIV32( SKP_int32_MAX, nrg );
+ SKP_assert( inv_nrg >= 0 );
+
+ /* Less update when subband energy is high */
+ if( nrg > SKP_LSHIFT( nl, 3 ) ) {
+ coef = VAD_NOISE_LEVEL_SMOOTH_COEF_Q16 >> 3;
+ } else if( nrg < nl ) {
+ coef = VAD_NOISE_LEVEL_SMOOTH_COEF_Q16;
+ } else {
+ coef = SKP_SMULWB( SKP_SMULWW( inv_nrg, nl ), VAD_NOISE_LEVEL_SMOOTH_COEF_Q16 << 1 );
+ }
+
+ /* Initially faster smoothing */
+ coef = SKP_max_int( coef, min_coef );
+
+ /* Smooth inverse energies */
+ psSilk_VAD->inv_NL[ k ] = SKP_SMLAWB( psSilk_VAD->inv_NL[ k ], inv_nrg - psSilk_VAD->inv_NL[ k ], coef );
+ SKP_assert( psSilk_VAD->inv_NL[ k ] >= 0 );
+
+ /* Compute noise level by inverting again */
+ nl = SKP_DIV32( SKP_int32_MAX, psSilk_VAD->inv_NL[ k ] );
+ SKP_assert( nl >= 0 );
+
+ /* Limit noise levels (guarantee 7 bits of head room) */
+ nl = SKP_min( nl, 0x00FFFFFF );
+
+ /* Store as part of state */
+ psSilk_VAD->NL[ k ] = nl;
+ }
+
+ /* Increment frame counter */
+ psSilk_VAD->counter++;
+}
--- /dev/null
+++ b/src_common/SKP_Silk_VQ_WMat_EC.c
@@ -1,0 +1,107 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/* Entropy constrained matrix-weighted VQ, hard-coded to 5-element vectors, for a single input data vector */
+void SKP_Silk_VQ_WMat_EC(
+ SKP_int8 *ind, /* O index of best codebook vector */
+ SKP_int32 *rate_dist_Q14, /* O best weighted quantization error + mu * rate*/
+ const SKP_int16 *in_Q14, /* I input vector to be quantized */
+ const SKP_int32 *W_Q18, /* I weighting matrix */
+ const SKP_int8 *cb_Q7, /* I codebook */
+ const SKP_uint8 *cl_Q5, /* I code length for each codebook vector */
+ const SKP_int mu_Q9, /* I tradeoff between weighted error and rate */
+ SKP_int L /* I number of vectors in codebook */
+)
+{
+ SKP_int k;
+ const SKP_int8 *cb_row_Q7;
+ SKP_int16 diff_Q14[ 5 ];
+ SKP_int32 sum1_Q14, sum2_Q16;
+
+ /* Loop over codebook */
+ *rate_dist_Q14 = SKP_int32_MAX;
+ cb_row_Q7 = cb_Q7;
+ for( k = 0; k < L; k++ ) {
+ diff_Q14[ 0 ] = in_Q14[ 0 ] - SKP_LSHIFT( cb_row_Q7[ 0 ], 7 );
+ diff_Q14[ 1 ] = in_Q14[ 1 ] - SKP_LSHIFT( cb_row_Q7[ 1 ], 7 );
+ diff_Q14[ 2 ] = in_Q14[ 2 ] - SKP_LSHIFT( cb_row_Q7[ 2 ], 7 );
+ diff_Q14[ 3 ] = in_Q14[ 3 ] - SKP_LSHIFT( cb_row_Q7[ 3 ], 7 );
+ diff_Q14[ 4 ] = in_Q14[ 4 ] - SKP_LSHIFT( cb_row_Q7[ 4 ], 7 );
+
+ /* Weighted rate */
+ sum1_Q14 = SKP_SMULBB( mu_Q9, cl_Q5[ k ] );
+
+ SKP_assert( sum1_Q14 >= 0 );
+
+ /* first row of W_Q18 */
+ sum2_Q16 = SKP_SMULWB( W_Q18[ 1 ], diff_Q14[ 1 ] );
+ sum2_Q16 = SKP_SMLAWB( sum2_Q16, W_Q18[ 2 ], diff_Q14[ 2 ] );
+ sum2_Q16 = SKP_SMLAWB( sum2_Q16, W_Q18[ 3 ], diff_Q14[ 3 ] );
+ sum2_Q16 = SKP_SMLAWB( sum2_Q16, W_Q18[ 4 ], diff_Q14[ 4 ] );
+ sum2_Q16 = SKP_LSHIFT( sum2_Q16, 1 );
+ sum2_Q16 = SKP_SMLAWB( sum2_Q16, W_Q18[ 0 ], diff_Q14[ 0 ] );
+ sum1_Q14 = SKP_SMLAWB( sum1_Q14, sum2_Q16, diff_Q14[ 0 ] );
+
+ /* second row of W_Q18 */
+ sum2_Q16 = SKP_SMULWB( W_Q18[ 7 ], diff_Q14[ 2 ] );
+ sum2_Q16 = SKP_SMLAWB( sum2_Q16, W_Q18[ 8 ], diff_Q14[ 3 ] );
+ sum2_Q16 = SKP_SMLAWB( sum2_Q16, W_Q18[ 9 ], diff_Q14[ 4 ] );
+ sum2_Q16 = SKP_LSHIFT( sum2_Q16, 1 );
+ sum2_Q16 = SKP_SMLAWB( sum2_Q16, W_Q18[ 6 ], diff_Q14[ 1 ] );
+ sum1_Q14 = SKP_SMLAWB( sum1_Q14, sum2_Q16, diff_Q14[ 1 ] );
+
+ /* third row of W_Q18 */
+ sum2_Q16 = SKP_SMULWB( W_Q18[ 13 ], diff_Q14[ 3 ] );
+ sum2_Q16 = SKP_SMLAWB( sum2_Q16, W_Q18[ 14 ], diff_Q14[ 4 ] );
+ sum2_Q16 = SKP_LSHIFT( sum2_Q16, 1 );
+ sum2_Q16 = SKP_SMLAWB( sum2_Q16, W_Q18[ 12 ], diff_Q14[ 2 ] );
+ sum1_Q14 = SKP_SMLAWB( sum1_Q14, sum2_Q16, diff_Q14[ 2 ] );
+
+ /* fourth row of W_Q18 */
+ sum2_Q16 = SKP_SMULWB( W_Q18[ 19 ], diff_Q14[ 4 ] );
+ sum2_Q16 = SKP_LSHIFT( sum2_Q16, 1 );
+ sum2_Q16 = SKP_SMLAWB( sum2_Q16, W_Q18[ 18 ], diff_Q14[ 3 ] );
+ sum1_Q14 = SKP_SMLAWB( sum1_Q14, sum2_Q16, diff_Q14[ 3 ] );
+
+ /* last row of W_Q18 */
+ sum2_Q16 = SKP_SMULWB( W_Q18[ 24 ], diff_Q14[ 4 ] );
+ sum1_Q14 = SKP_SMLAWB( sum1_Q14, sum2_Q16, diff_Q14[ 4 ] );
+
+ SKP_assert( sum1_Q14 >= 0 );
+
+ /* find best */
+ if( sum1_Q14 < *rate_dist_Q14 ) {
+ *rate_dist_Q14 = sum1_Q14;
+ *ind = (SKP_int8)k;
+ }
+
+ /* Go to next cbk vector */
+ cb_row_Q7 += LTP_ORDER;
+ }
+}
--- /dev/null
+++ b/src_common/SKP_Silk_check_control_input.c
@@ -1,0 +1,94 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+#include "SKP_Silk_control.h"
+#include "SKP_Silk_errors.h"
+
+/* Check encoder control struct */
+SKP_int check_control_input(
+ SKP_SILK_SDK_EncControlStruct *encControl /* I: Control structure */
+)
+{
+ SKP_assert( encControl != NULL );
+
+ if( ( ( encControl->API_sampleRate != 8000 ) &&
+ ( encControl->API_sampleRate != 12000 ) &&
+ ( encControl->API_sampleRate != 16000 ) &&
+ ( encControl->API_sampleRate != 24000 ) &&
+ ( encControl->API_sampleRate != 32000 ) &&
+ ( encControl->API_sampleRate != 44100 ) &&
+ ( encControl->API_sampleRate != 48000 ) ) ||
+ ( ( encControl->desiredInternalSampleRate != 8000 ) &&
+ ( encControl->desiredInternalSampleRate != 12000 ) &&
+ ( encControl->desiredInternalSampleRate != 16000 ) ) ||
+ ( ( encControl->maxInternalSampleRate != 8000 ) &&
+ ( encControl->maxInternalSampleRate != 12000 ) &&
+ ( encControl->maxInternalSampleRate != 16000 ) ) ||
+ ( ( encControl->minInternalSampleRate != 8000 ) &&
+ ( encControl->minInternalSampleRate != 12000 ) &&
+ ( encControl->minInternalSampleRate != 16000 ) ) ||
+ ( encControl->minInternalSampleRate > encControl->desiredInternalSampleRate ) ||
+ ( encControl->maxInternalSampleRate < encControl->desiredInternalSampleRate ) ||
+ ( encControl->minInternalSampleRate > encControl->maxInternalSampleRate ) ) {
+ SKP_assert( 0 );
+ return SKP_SILK_ENC_FS_NOT_SUPPORTED;
+ }
+ if( encControl->payloadSize_ms != 10 &&
+ encControl->payloadSize_ms != 20 &&
+ encControl->payloadSize_ms != 40 &&
+ encControl->payloadSize_ms != 60 ) {
+ SKP_assert( 0 );
+ return SKP_SILK_ENC_PACKET_SIZE_NOT_SUPPORTED;
+ }
+ if( encControl->packetLossPercentage < 0 || encControl->packetLossPercentage > 100 ) {
+ SKP_assert( 0 );
+ return SKP_SILK_ENC_INVALID_LOSS_RATE;
+ }
+ if( encControl->useDTX < 0 || encControl->useDTX > 1 ) {
+ SKP_assert( 0 );
+ return SKP_SILK_ENC_INVALID_DTX_SETTING;
+ }
+ if( encControl->useCBR < 0 || encControl->useCBR > 1 ) {
+ SKP_assert( 0 );
+ return SKP_SILK_ENC_INVALID_CBR_SETTING;
+ }
+ if( encControl->useInBandFEC < 0 || encControl->useInBandFEC > 1 ) {
+ SKP_assert( 0 );
+ return SKP_SILK_ENC_INVALID_INBAND_FEC_SETTING;
+ }
+ if( encControl->nChannels < 1 || encControl->nChannels > ENCODER_NUM_CHANNELS ) {
+ SKP_assert( 0 );
+ return SKP_SILK_ENC_INVALID_NUMBER_OF_CHANNELS_ERROR;
+ }
+ if( encControl->complexity < 0 || encControl->complexity > 10 ) {
+ SKP_assert( 0 );
+ return SKP_SILK_ENC_INVALID_COMPLEXITY_SETTING;
+ }
+
+ return SKP_SILK_NO_ERROR;
+}
--- /dev/null
+++ b/src_common/SKP_Silk_code_signs.c
@@ -1,0 +1,111 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+//#define SKP_enc_map(a) ((a) > 0 ? 1 : 0)
+//#define SKP_dec_map(a) ((a) > 0 ? 1 : -1)
+/* shifting avoids if-statement */
+#define SKP_enc_map(a) ( SKP_RSHIFT( (a), 15 ) + 1 )
+#define SKP_dec_map(a) ( SKP_LSHIFT( (a), 1 ) - 1 )
+
+/* Encodes signs of excitation */
+void SKP_Silk_encode_signs(
+ ec_enc *psRangeEnc, /* I/O Compressor data structure */
+ const SKP_int8 pulses[], /* I pulse signal */
+ SKP_int length, /* I length of input */
+ const SKP_int signalType, /* I Signal type */
+ const SKP_int quantOffsetType, /* I Quantization offset type */
+ const SKP_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum of absolute pulses per block */
+)
+{
+ SKP_int i, j, p;
+ SKP_uint8 icdf[ 2 ];
+ const SKP_int8 *q_ptr;
+ const SKP_uint8 *icdf_ptr;
+
+ icdf[ 1 ] = 0;
+ q_ptr = pulses;
+ i = SKP_SMULBB( 6, SKP_ADD_LSHIFT( quantOffsetType, signalType, 1 ) );
+ icdf_ptr = &SKP_Silk_sign_iCDF[ i ];
+ length = SKP_RSHIFT( length + SHELL_CODEC_FRAME_LENGTH/2, LOG2_SHELL_CODEC_FRAME_LENGTH );
+ for( i = 0; i < length; i++ ) {
+ p = sum_pulses[ i ];
+ if( p > 0 ) {
+ icdf[ 0 ] = icdf_ptr[ SKP_min( p - 1, 5 ) ];
+ for( j = 0; j < SHELL_CODEC_FRAME_LENGTH; j++ ) {
+ if( q_ptr[ j ] != 0 ) {
+ ec_enc_icdf( psRangeEnc, SKP_enc_map( q_ptr[ j ]), icdf, 8 );
+ }
+ }
+ }
+ q_ptr += SHELL_CODEC_FRAME_LENGTH;
+ }
+}
+
+/* Decodes signs of excitation */
+void SKP_Silk_decode_signs(
+ ec_dec *psRangeDec, /* I/O Compressor data structure */
+ SKP_int pulses[], /* I/O pulse signal */
+ SKP_int length, /* I length of input */
+ const SKP_int signalType, /* I Signal type */
+ const SKP_int quantOffsetType, /* I Quantization offset type */
+ const SKP_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum of absolute pulses per block */
+)
+{
+ SKP_int i, j, p;
+ SKP_uint8 icdf[ 2 ];
+ SKP_int *q_ptr;
+ const SKP_uint8 *icdf_ptr;
+
+ icdf[ 1 ] = 0;
+ q_ptr = pulses;
+ i = SKP_SMULBB( 6, SKP_ADD_LSHIFT( quantOffsetType, signalType, 1 ) );
+ icdf_ptr = &SKP_Silk_sign_iCDF[ i ];
+ length = SKP_RSHIFT( length + SHELL_CODEC_FRAME_LENGTH/2, LOG2_SHELL_CODEC_FRAME_LENGTH );
+ for( i = 0; i < length; i++ ) {
+ p = sum_pulses[ i ];
+ if( p > 0 ) {
+ icdf[ 0 ] = icdf_ptr[ SKP_min( p - 1, 5 ) ];
+ for( j = 0; j < SHELL_CODEC_FRAME_LENGTH; j++ ) {
+ if( q_ptr[ j ] > 0 ) {
+ /* attach sign */
+#if 0
+ /* conditional implementation */
+ if( ec_dec_icdf( psRangeDec, icdf, 8 ) == 0 ) {
+ q_ptr[ j ] = -q_ptr[ j ];
+ }
+#else
+ /* implementation with shift, subtraction, multiplication */
+ q_ptr[ j ] *= SKP_dec_map( ec_dec_icdf( psRangeDec, icdf, 8 ) );
+#endif
+ }
+ }
+ }
+ q_ptr += SHELL_CODEC_FRAME_LENGTH;
+ }
+}
--- /dev/null
+++ b/src_common/SKP_Silk_control_SNR.c
@@ -1,0 +1,74 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+/* Control SNR of redidual quantizer */
+SKP_int SKP_Silk_control_SNR(
+ SKP_Silk_encoder_state *psEncC, /* I/O Pointer to Silk encoder state */
+ SKP_int32 TargetRate_bps /* I Target max bitrate (bps) */
+)
+{
+ SKP_int k, ret = SKP_SILK_NO_ERROR;
+ SKP_int32 frac_Q6;
+ const SKP_int32 *rateTable;
+
+ /* Set bitrate/coding quality */
+ TargetRate_bps = SKP_LIMIT( TargetRate_bps, MIN_TARGET_RATE_BPS, MAX_TARGET_RATE_BPS );
+ if( TargetRate_bps != psEncC->TargetRate_bps ) {
+ psEncC->TargetRate_bps = TargetRate_bps;
+
+ /* If new TargetRate_bps, translate to SNR_dB value */
+ if( psEncC->fs_kHz == 8 ) {
+ rateTable = TargetRate_table_NB;
+ } else if( psEncC->fs_kHz == 12 ) {
+ rateTable = TargetRate_table_MB;
+ } else if( psEncC->fs_kHz == 16 ) {
+ rateTable = TargetRate_table_WB;
+ } else {
+ SKP_assert( 0 );
+ }
+
+ /* Reduce bitrate for 10 ms modes in these calculations */
+ if( psEncC->nb_subfr == 2 ) {
+ TargetRate_bps -= REDUCE_BITRATE_10_MS_BPS;
+ }
+
+ /* Find bitrate interval in table and interpolate */
+ for( k = 1; k < TARGET_RATE_TAB_SZ; k++ ) {
+ if( TargetRate_bps <= rateTable[ k ] ) {
+ frac_Q6 = SKP_DIV32( SKP_LSHIFT( TargetRate_bps - rateTable[ k - 1 ], 6 ),
+ rateTable[ k ] - rateTable[ k - 1 ] );
+ psEncC->SNR_dB_Q7 = SKP_LSHIFT( SNR_table_Q1[ k - 1 ], 6 ) + SKP_MUL( frac_Q6, SNR_table_Q1[ k ] - SNR_table_Q1[ k - 1 ] );
+ break;
+ }
+ }
+ }
+
+ return ret;
+}
--- /dev/null
+++ b/src_common/SKP_Silk_control_audio_bandwidth.c
@@ -1,0 +1,106 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+#include "SKP_Silk_tuning_parameters.h"
+
+/* Control internal sampling rate */
+SKP_int SKP_Silk_control_audio_bandwidth(
+ SKP_Silk_encoder_state *psEncC /* I/O Pointer to Silk encoder state */
+)
+{
+ SKP_int fs_kHz;
+ SKP_int32 fs_Hz;
+
+ fs_kHz = psEncC->fs_kHz;
+ fs_Hz = SKP_SMULBB( fs_kHz, 1000 );
+ if( fs_Hz == 0 ) {
+ /* Encoder has just been initialized */
+ fs_Hz = SKP_min( psEncC->desiredInternal_fs_Hz, psEncC->API_fs_Hz );
+ fs_kHz = SKP_DIV32_16( fs_Hz, 1000 );
+ } else if( fs_Hz > psEncC->API_fs_Hz || fs_Hz > psEncC->maxInternal_fs_Hz || fs_Hz < psEncC->minInternal_fs_Hz ) {
+ /* Make sure internal rate is not higher than external rate or maximum allowed, or lower than minimum allowed */
+ fs_Hz = psEncC->API_fs_Hz;
+ fs_Hz = SKP_min( fs_Hz, psEncC->maxInternal_fs_Hz );
+ fs_Hz = SKP_max( fs_Hz, psEncC->minInternal_fs_Hz );
+ fs_kHz = SKP_DIV32_16( fs_Hz, 1000 );
+ } else {
+ /* State machine for the internal sampling rate switching */
+ if( psEncC->sLP.transition_frame_no >= TRANSITION_FRAMES ) {
+ /* Stop transition phase */
+ psEncC->sLP.mode = 0;
+ }
+ if( psEncC->allow_bandwidth_switch ) {
+ /* Check if we should switch down */
+ if( SKP_SMULBB( psEncC->fs_kHz, 1000 ) > psEncC->desiredInternal_fs_Hz )
+ {
+ /* Switch down */
+ if( psEncC->sLP.mode == 0 ) {
+ /* New transition */
+ psEncC->sLP.transition_frame_no = TRANSITION_FRAMES;
+
+ /* Reset transition filter state */
+ SKP_memset( psEncC->sLP.In_LP_State, 0, sizeof( psEncC->sLP.In_LP_State ) );
+ }
+ if( psEncC->sLP.transition_frame_no <= 0 ) {
+ /* Stop transition phase */
+ psEncC->sLP.mode = 0;
+
+ /* Switch to a lower sample frequency */
+ fs_kHz = psEncC->fs_kHz == 16 ? 12 : 8;
+ } else {
+ /* Direction: down (at double speed) */
+ psEncC->sLP.mode = -2;
+ }
+ }
+ else
+ /* Check if we should switch up */
+ if( SKP_SMULBB( psEncC->fs_kHz, 1000 ) < psEncC->desiredInternal_fs_Hz )
+ {
+ /* Switch up */
+ if( psEncC->sLP.mode == 0 ) {
+ /* Switch to a higher sample frequency */
+ fs_kHz = psEncC->fs_kHz == 8 ? 12 : 16;
+
+ /* New transition */
+ psEncC->sLP.transition_frame_no = 0;
+
+ /* Reset transition filter state */
+ SKP_memset( psEncC->sLP.In_LP_State, 0, sizeof( psEncC->sLP.In_LP_State ) );
+ }
+ /* Direction: up */
+ psEncC->sLP.mode = 1;
+ }
+ }
+ }
+
+#ifdef FORCE_INTERNAL_FS_KHZ
+ fs_kHz = FORCE_INTERNAL_FS_KHZ;
+#endif
+
+ return fs_kHz;
+}
--- /dev/null
+++ b/src_common/SKP_Silk_control_codec.c
@@ -1,0 +1,413 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_tuning_parameters.h"
+#if FIXED_POINT
+#include "SKP_Silk_main_FIX.h"
+#define SKP_Silk_encoder_state_Fxx SKP_Silk_encoder_state_FIX
+#else
+#include "SKP_Silk_main_FLP.h"
+#define SKP_Silk_encoder_state_Fxx SKP_Silk_encoder_state_FLP
+#endif
+
+SKP_int SKP_Silk_setup_resamplers(
+ SKP_Silk_encoder_state_Fxx *psEnc, /* I/O */
+ SKP_int fs_kHz /* I */
+);
+
+SKP_int SKP_Silk_setup_fs(
+ SKP_Silk_encoder_state_Fxx *psEnc, /* I/O */
+ SKP_int fs_kHz, /* I */
+ SKP_int PacketSize_ms /* I */
+);
+
+SKP_int SKP_Silk_setup_complexity(
+ SKP_Silk_encoder_state *psEncC, /* I/O */
+ SKP_int Complexity /* I */
+);
+
+SKP_INLINE SKP_int SKP_Silk_setup_LBRR(
+ SKP_Silk_encoder_state *psEncC, /* I/O */
+ const SKP_int32 TargetRate_bps /* I */
+);
+
+
+/* Control encoder */
+SKP_int SKP_Silk_control_encoder(
+ SKP_Silk_encoder_state_Fxx *psEnc, /* I/O Pointer to Silk encoder state */
+ SKP_SILK_SDK_EncControlStruct *encControl, /* I: Control structure */
+ const SKP_int32 TargetRate_bps, /* I Target max bitrate (bps) */
+ const SKP_int allow_bw_switch /* I Flag to allow switching audio bandwidth */
+)
+{
+ SKP_int fs_kHz, ret = 0;
+
+ psEnc->sCmn.useDTX = encControl->useDTX;
+ psEnc->sCmn.useCBR = encControl->useCBR;
+ psEnc->sCmn.API_fs_Hz = encControl->API_sampleRate;
+ psEnc->sCmn.maxInternal_fs_Hz = encControl->maxInternalSampleRate;
+ psEnc->sCmn.minInternal_fs_Hz = encControl->minInternalSampleRate;
+ psEnc->sCmn.desiredInternal_fs_Hz = encControl->desiredInternalSampleRate;
+ psEnc->sCmn.useInBandFEC = encControl->useInBandFEC;
+ psEnc->sCmn.allow_bandwidth_switch = allow_bw_switch;
+
+ if( psEnc->sCmn.controlled_since_last_payload != 0 && psEnc->sCmn.prefillFlag == 0 ) {
+ if( psEnc->sCmn.API_fs_Hz != psEnc->sCmn.prev_API_fs_Hz && psEnc->sCmn.fs_kHz > 0 ) {
+ /* Change in API sampling rate in the middle of encoding a packet */
+ ret += SKP_Silk_setup_resamplers( psEnc, psEnc->sCmn.fs_kHz );
+ }
+ return ret;
+ }
+
+ /* Beyond this point we know that there are no previously coded frames in the payload buffer */
+
+ /********************************************/
+ /* Determine internal sampling rate */
+ /********************************************/
+ fs_kHz = SKP_Silk_control_audio_bandwidth( &psEnc->sCmn );
+
+ /********************************************/
+ /* Prepare resampler and buffered data */
+ /********************************************/
+ ret += SKP_Silk_setup_resamplers( psEnc, fs_kHz );
+
+ /********************************************/
+ /* Set internal sampling frequency */
+ /********************************************/
+ ret += SKP_Silk_setup_fs( psEnc, fs_kHz, encControl->payloadSize_ms );
+
+ /********************************************/
+ /* Set encoding complexity */
+ /********************************************/
+ ret += SKP_Silk_setup_complexity( &psEnc->sCmn, encControl->complexity );
+
+ /********************************************/
+ /* Set packet loss rate measured by farend */
+ /********************************************/
+ psEnc->sCmn.PacketLoss_perc = encControl->packetLossPercentage;
+
+ /********************************************/
+ /* Set LBRR usage */
+ /********************************************/
+ ret += SKP_Silk_setup_LBRR( &psEnc->sCmn, TargetRate_bps );
+
+ psEnc->sCmn.controlled_since_last_payload = 1;
+
+ return ret;
+}
+
+SKP_int SKP_Silk_setup_resamplers(
+ SKP_Silk_encoder_state_Fxx *psEnc, /* I/O */
+ SKP_int fs_kHz /* I */
+)
+{
+ SKP_int ret = SKP_SILK_NO_ERROR;
+ SKP_int32 nSamples_temp;
+
+ if( psEnc->sCmn.fs_kHz != fs_kHz || psEnc->sCmn.prev_API_fs_Hz != psEnc->sCmn.API_fs_Hz )
+ {
+ if( psEnc->sCmn.fs_kHz == 0 ) {
+ /* Initialize the resampler for enc_API.c preparing resampling from API_fs_Hz to fs_kHz */
+ ret += SKP_Silk_resampler_init( &psEnc->sCmn.resampler_state, psEnc->sCmn.API_fs_Hz, fs_kHz * 1000 );
+ } else {
+ /* Allocate space for worst case temporary upsampling, 8 to 48 kHz, so a factor 6 */
+ SKP_int16 x_buf_API_fs_Hz[ ( 2 * MAX_FRAME_LENGTH + LA_SHAPE_MAX ) * ( MAX_API_FS_KHZ / 8 ) ];
+#if FIXED_POINT
+ SKP_int16 *x_bufFIX = psEnc->x_buf;
+#else
+ SKP_int16 x_bufFIX[ 2 * MAX_FRAME_LENGTH + LA_SHAPE_MAX ];
+#endif
+
+ nSamples_temp = SKP_LSHIFT( psEnc->sCmn.frame_length, 1 ) + LA_SHAPE_MS * psEnc->sCmn.fs_kHz;
+
+#if !FIXED_POINT
+ SKP_float2short_array( x_bufFIX, psEnc->x_buf, nSamples_temp );
+#endif
+
+ if( SKP_SMULBB( fs_kHz, 1000 ) < psEnc->sCmn.API_fs_Hz && psEnc->sCmn.fs_kHz != 0 ) {
+ /* Resample buffered data in x_buf to API_fs_Hz */
+
+ SKP_Silk_resampler_state_struct temp_resampler_state;
+
+ /* Initialize resampler for temporary resampling of x_buf data to API_fs_Hz */
+ ret += SKP_Silk_resampler_init( &temp_resampler_state, SKP_SMULBB( psEnc->sCmn.fs_kHz, 1000 ), psEnc->sCmn.API_fs_Hz );
+
+ /* Temporary resampling of x_buf data to API_fs_Hz */
+ ret += SKP_Silk_resampler( &temp_resampler_state, x_buf_API_fs_Hz, x_bufFIX, nSamples_temp );
+
+ /* Calculate number of samples that has been temporarily upsampled */
+ nSamples_temp = SKP_DIV32_16( nSamples_temp * psEnc->sCmn.API_fs_Hz, SKP_SMULBB( psEnc->sCmn.fs_kHz, 1000 ) );
+
+ /* Initialize the resampler for enc_API.c preparing resampling from API_fs_Hz to fs_kHz */
+ ret += SKP_Silk_resampler_init( &psEnc->sCmn.resampler_state, psEnc->sCmn.API_fs_Hz, SKP_SMULBB( fs_kHz, 1000 ) );
+
+ } else {
+ /* Copy data */
+ SKP_memcpy( x_buf_API_fs_Hz, x_bufFIX, nSamples_temp * sizeof( SKP_int16 ) );
+ }
+
+ if( 1000 * fs_kHz != psEnc->sCmn.API_fs_Hz ) {
+ /* Correct resampler state (unless resampling by a factor 1) by resampling buffered data from API_fs_Hz to fs_kHz */
+ ret += SKP_Silk_resampler( &psEnc->sCmn.resampler_state, x_bufFIX, x_buf_API_fs_Hz, nSamples_temp );
+ }
+#if !FIXED_POINT
+ SKP_short2float_array( psEnc->x_buf, x_bufFIX, ( 2 * MAX_FRAME_LENGTH_MS + LA_SHAPE_MS ) * fs_kHz );
+#endif
+ }
+ }
+
+ psEnc->sCmn.prev_API_fs_Hz = psEnc->sCmn.API_fs_Hz;
+
+ return ret;
+}
+
+SKP_int SKP_Silk_setup_fs(
+ SKP_Silk_encoder_state_Fxx *psEnc, /* I/O */
+ SKP_int fs_kHz, /* I */
+ SKP_int PacketSize_ms /* I */
+)
+{
+ SKP_int ret = SKP_SILK_NO_ERROR;
+
+ /* Set packet size */
+ if( PacketSize_ms != psEnc->sCmn.PacketSize_ms ) {
+ if( ( PacketSize_ms != 10 ) &&
+ ( PacketSize_ms != 20 ) &&
+ ( PacketSize_ms != 40 ) &&
+ ( PacketSize_ms != 60 ) ) {
+ ret = SKP_SILK_ENC_PACKET_SIZE_NOT_SUPPORTED;
+ }
+ if( PacketSize_ms <= 10 ) {
+ psEnc->sCmn.nFramesPerPacket = 1;
+ psEnc->sCmn.nb_subfr = PacketSize_ms == 10 ? 2 : 1;
+ psEnc->sCmn.frame_length = SKP_SMULBB( PacketSize_ms, fs_kHz );
+ psEnc->sCmn.pitch_LPC_win_length = SKP_SMULBB( FIND_PITCH_LPC_WIN_MS_2_SF, fs_kHz );
+ if( psEnc->sCmn.fs_kHz == 8 ) {
+ psEnc->sCmn.pitch_contour_iCDF = SKP_Silk_pitch_contour_10_ms_NB_iCDF;
+ } else {
+ psEnc->sCmn.pitch_contour_iCDF = SKP_Silk_pitch_contour_10_ms_iCDF;
+ }
+ } else {
+ psEnc->sCmn.nFramesPerPacket = SKP_DIV32_16( PacketSize_ms, MAX_FRAME_LENGTH_MS );
+ psEnc->sCmn.nb_subfr = MAX_NB_SUBFR;
+ psEnc->sCmn.frame_length = SKP_SMULBB( 20, fs_kHz );
+ psEnc->sCmn.pitch_LPC_win_length = SKP_SMULBB( FIND_PITCH_LPC_WIN_MS, fs_kHz );
+ if( psEnc->sCmn.fs_kHz == 8 ) {
+ psEnc->sCmn.pitch_contour_iCDF = SKP_Silk_pitch_contour_NB_iCDF;
+ } else {
+ psEnc->sCmn.pitch_contour_iCDF = SKP_Silk_pitch_contour_iCDF;
+ }
+ }
+ psEnc->sCmn.PacketSize_ms = PacketSize_ms;
+ psEnc->sCmn.TargetRate_bps = 0; /* trigger new SNR computation */
+ }
+
+ /* Set internal sampling frequency */
+ SKP_assert( fs_kHz == 8 || fs_kHz == 12 || fs_kHz == 16 );
+ SKP_assert( psEnc->sCmn.nb_subfr == 2 || psEnc->sCmn.nb_subfr == 4 );
+ if( psEnc->sCmn.fs_kHz != fs_kHz ) {
+ /* reset part of the state */
+#if FIXED_POINT
+ SKP_memset( &psEnc->sShape, 0, sizeof( SKP_Silk_shape_state_FIX ) );
+ SKP_memset( &psEnc->sPrefilt, 0, sizeof( SKP_Silk_prefilter_state_FIX ) );
+#else
+ SKP_memset( &psEnc->sShape, 0, sizeof( SKP_Silk_shape_state_FLP ) );
+ SKP_memset( &psEnc->sPrefilt, 0, sizeof( SKP_Silk_prefilter_state_FLP ) );
+#endif
+ SKP_memset( &psEnc->sCmn.sNSQ, 0, sizeof( SKP_Silk_nsq_state ) );
+ SKP_memset( psEnc->sCmn.prev_NLSFq_Q15, 0, sizeof( psEnc->sCmn.prev_NLSFq_Q15 ) );
+ SKP_memset( &psEnc->sCmn.sLP.In_LP_State, 0, sizeof( psEnc->sCmn.sLP.In_LP_State ) );
+ psEnc->sCmn.inputBufIx = 0;
+ psEnc->sCmn.nFramesAnalyzed = 0;
+ psEnc->sCmn.TargetRate_bps = 0; /* trigger new SNR computation */
+
+ /* Initialize non-zero parameters */
+ psEnc->sCmn.prevLag = 100;
+ psEnc->sCmn.first_frame_after_reset = 1;
+ psEnc->sPrefilt.lagPrev = 100;
+ psEnc->sShape.LastGainIndex = 10;
+ psEnc->sCmn.sNSQ.lagPrev = 100;
+ psEnc->sCmn.sNSQ.prev_inv_gain_Q16 = 65536;
+
+ psEnc->sCmn.fs_kHz = fs_kHz;
+ if( psEnc->sCmn.fs_kHz == 8 ) {
+ if( psEnc->sCmn.nb_subfr == MAX_NB_SUBFR ) {
+ psEnc->sCmn.pitch_contour_iCDF = SKP_Silk_pitch_contour_NB_iCDF;
+ } else {
+ psEnc->sCmn.pitch_contour_iCDF = SKP_Silk_pitch_contour_10_ms_NB_iCDF;
+ }
+ } else {
+ if( psEnc->sCmn.nb_subfr == MAX_NB_SUBFR ) {
+ psEnc->sCmn.pitch_contour_iCDF = SKP_Silk_pitch_contour_iCDF;
+ } else {
+ psEnc->sCmn.pitch_contour_iCDF = SKP_Silk_pitch_contour_10_ms_iCDF;
+ }
+ }
+ if( psEnc->sCmn.fs_kHz == 8 || psEnc->sCmn.fs_kHz == 12 ) {
+ psEnc->sCmn.predictLPCOrder = MIN_LPC_ORDER;
+ psEnc->sCmn.psNLSF_CB = &SKP_Silk_NLSF_CB_NB_MB;
+ } else {
+ psEnc->sCmn.predictLPCOrder = MAX_LPC_ORDER;
+ psEnc->sCmn.psNLSF_CB = &SKP_Silk_NLSF_CB_WB;
+ }
+ psEnc->sCmn.subfr_length = SUB_FRAME_LENGTH_MS * fs_kHz;
+ psEnc->sCmn.frame_length = SKP_SMULBB( psEnc->sCmn.subfr_length, psEnc->sCmn.nb_subfr );
+ psEnc->sCmn.ltp_mem_length = SKP_SMULBB( LTP_MEM_LENGTH_MS, fs_kHz );
+ psEnc->sCmn.la_pitch = SKP_SMULBB( LA_PITCH_MS, fs_kHz );
+ psEnc->sCmn.max_pitch_lag = SKP_SMULBB( 18, fs_kHz );
+ if( psEnc->sCmn.nb_subfr == MAX_NB_SUBFR ) {
+ psEnc->sCmn.pitch_LPC_win_length = SKP_SMULBB( FIND_PITCH_LPC_WIN_MS, fs_kHz );
+ } else {
+ psEnc->sCmn.pitch_LPC_win_length = SKP_SMULBB( FIND_PITCH_LPC_WIN_MS_2_SF, fs_kHz );
+ }
+ if( psEnc->sCmn.fs_kHz == 16 ) {
+ psEnc->sCmn.mu_LTP_Q9 = SKP_FIX_CONST( MU_LTP_QUANT_WB, 9 );
+ psEnc->sCmn.pitch_lag_low_bits_iCDF = SKP_Silk_uniform8_iCDF;
+ } else if( psEnc->sCmn.fs_kHz == 12 ) {
+ psEnc->sCmn.mu_LTP_Q9 = SKP_FIX_CONST( MU_LTP_QUANT_MB, 9 );
+ psEnc->sCmn.pitch_lag_low_bits_iCDF = SKP_Silk_uniform6_iCDF;
+ } else {
+ psEnc->sCmn.mu_LTP_Q9 = SKP_FIX_CONST( MU_LTP_QUANT_NB, 9 );
+ psEnc->sCmn.pitch_lag_low_bits_iCDF = SKP_Silk_uniform4_iCDF;
+ }
+ }
+
+ /* Check that settings are valid */
+ SKP_assert( ( psEnc->sCmn.subfr_length * psEnc->sCmn.nb_subfr ) == psEnc->sCmn.frame_length );
+
+ return ret;
+}
+
+SKP_int SKP_Silk_setup_complexity(
+ SKP_Silk_encoder_state *psEncC, /* I/O */
+ SKP_int Complexity /* I */
+)
+{
+ SKP_int ret = 0;
+
+ /* Set encoding complexity */
+ SKP_assert( Complexity >= 0 && Complexity <= 10 );
+ if( Complexity < 2 ) {
+ psEncC->pitchEstimationComplexity = SKP_Silk_PE_MIN_COMPLEX;
+ psEncC->pitchEstimationThreshold_Q16 = SKP_FIX_CONST( 0.8, 16 );
+ psEncC->pitchEstimationLPCOrder = 6;
+ psEncC->shapingLPCOrder = 8;
+ psEncC->la_shape = 3 * psEncC->fs_kHz;
+ psEncC->nStatesDelayedDecision = 1;
+ psEncC->useInterpolatedNLSFs = 0;
+ psEncC->LTPQuantLowComplexity = 1;
+ psEncC->NLSF_MSVQ_Survivors = 2;
+ psEncC->warping_Q16 = 0;
+ } else if( Complexity < 4 ) {
+ psEncC->pitchEstimationComplexity = SKP_Silk_PE_MID_COMPLEX;
+ psEncC->pitchEstimationThreshold_Q16 = SKP_FIX_CONST( 0.76, 16 );
+ psEncC->pitchEstimationLPCOrder = 8;
+ psEncC->shapingLPCOrder = 10;
+ psEncC->la_shape = 5 * psEncC->fs_kHz;
+ psEncC->nStatesDelayedDecision = 1;
+ psEncC->useInterpolatedNLSFs = 1;
+ psEncC->LTPQuantLowComplexity = 0;
+ psEncC->NLSF_MSVQ_Survivors = 4;
+ psEncC->warping_Q16 = 0;
+ } else if( Complexity < 6 ) {
+ psEncC->pitchEstimationComplexity = SKP_Silk_PE_MID_COMPLEX;
+ psEncC->pitchEstimationThreshold_Q16 = SKP_FIX_CONST( 0.74, 16 );
+ psEncC->pitchEstimationLPCOrder = 10;
+ psEncC->shapingLPCOrder = 12;
+ psEncC->la_shape = 5 * psEncC->fs_kHz;
+ psEncC->nStatesDelayedDecision = 2;
+ psEncC->useInterpolatedNLSFs = 0;
+ psEncC->LTPQuantLowComplexity = 0;
+ psEncC->NLSF_MSVQ_Survivors = 6;
+ psEncC->warping_Q16 = psEncC->fs_kHz * SKP_FIX_CONST( WARPING_MULTIPLIER, 16 );
+ } else if( Complexity < 8 ) {
+ psEncC->pitchEstimationComplexity = SKP_Silk_PE_MID_COMPLEX;
+ psEncC->pitchEstimationThreshold_Q16 = SKP_FIX_CONST( 0.72, 16 );
+ psEncC->pitchEstimationLPCOrder = 12;
+ psEncC->shapingLPCOrder = 14;
+ psEncC->la_shape = 5 * psEncC->fs_kHz;
+ psEncC->nStatesDelayedDecision = 3;
+ psEncC->useInterpolatedNLSFs = 0;
+ psEncC->LTPQuantLowComplexity = 0;
+ psEncC->NLSF_MSVQ_Survivors = 8;
+ psEncC->warping_Q16 = psEncC->fs_kHz * SKP_FIX_CONST( WARPING_MULTIPLIER, 16 );
+ } else {
+ psEncC->pitchEstimationComplexity = SKP_Silk_PE_MAX_COMPLEX;
+ psEncC->pitchEstimationThreshold_Q16 = SKP_FIX_CONST( 0.7, 16 );
+ psEncC->pitchEstimationLPCOrder = 16;
+ psEncC->shapingLPCOrder = 16;
+ psEncC->la_shape = 5 * psEncC->fs_kHz;
+ psEncC->nStatesDelayedDecision = MAX_DEL_DEC_STATES;
+ psEncC->useInterpolatedNLSFs = 1;
+ psEncC->LTPQuantLowComplexity = 0;
+ psEncC->NLSF_MSVQ_Survivors = 16;
+ psEncC->warping_Q16 = psEncC->fs_kHz * SKP_FIX_CONST( WARPING_MULTIPLIER, 16 );
+ }
+
+ /* Do not allow higher pitch estimation LPC order than predict LPC order */
+ psEncC->pitchEstimationLPCOrder = SKP_min_int( psEncC->pitchEstimationLPCOrder, psEncC->predictLPCOrder );
+ psEncC->shapeWinLength = SUB_FRAME_LENGTH_MS * psEncC->fs_kHz + 2 * psEncC->la_shape;
+
+ SKP_assert( psEncC->pitchEstimationLPCOrder <= MAX_FIND_PITCH_LPC_ORDER );
+ SKP_assert( psEncC->shapingLPCOrder <= MAX_SHAPE_LPC_ORDER );
+ SKP_assert( psEncC->nStatesDelayedDecision <= MAX_DEL_DEC_STATES );
+ SKP_assert( psEncC->warping_Q16 <= 32767 );
+ SKP_assert( psEncC->la_shape <= LA_SHAPE_MAX );
+ SKP_assert( psEncC->shapeWinLength <= SHAPE_LPC_WIN_MAX );
+ SKP_assert( psEncC->NLSF_MSVQ_Survivors <= NLSF_VQ_MAX_SURVIVORS );
+
+ return ret;
+}
+
+SKP_INLINE SKP_int SKP_Silk_setup_LBRR(
+ SKP_Silk_encoder_state *psEncC, /* I/O */
+ const SKP_int32 TargetRate_bps /* I */
+)
+{
+ SKP_int ret = SKP_SILK_NO_ERROR;
+ SKP_int32 LBRRRate_thres_bps;
+
+ SKP_assert( psEncC->fs_kHz == 8 || psEncC->fs_kHz == 12 || psEncC->fs_kHz == 16 );
+ if( psEncC->fs_kHz == 8 ) {
+ LBRRRate_thres_bps = LBRR_NB_MIN_RATE_BPS;
+ } else if( psEncC->fs_kHz == 12 ) {
+ LBRRRate_thres_bps = LBRR_MB_MIN_RATE_BPS;
+ } else {
+ LBRRRate_thres_bps = LBRR_WB_MIN_RATE_BPS;
+ }
+
+ LBRRRate_thres_bps = SKP_RSHIFT( SKP_SMULBB( LBRRRate_thres_bps, 7 - psEncC->PacketLoss_perc ), 2 );
+ if( psEncC->useInBandFEC && TargetRate_bps >= LBRRRate_thres_bps && psEncC->PacketLoss_perc > 0 ) {
+ /* Set gain increase / rate reduction for LBRR usage */
+ psEncC->LBRR_GainIncreases = SKP_max_int( 7 - SKP_SMULWB( psEncC->PacketLoss_perc, SKP_FIX_CONST( 0.4, 16 ) ), 2 );
+ psEncC->LBRR_enabled = 1;
+ } else {
+ psEncC->LBRR_enabled = 0;
+ }
+
+ return ret;
+}
--- /dev/null
+++ b/src_common/SKP_Silk_create_init_destroy.c
@@ -1,0 +1,53 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+
+/************************/
+/* Init Decoder State */
+/************************/
+SKP_int SKP_Silk_init_decoder(
+ SKP_Silk_decoder_state *psDec /* I/O Decoder state pointer */
+)
+{
+ /* Clear the entire encoder state, except anything copied */
+ SKP_memset( psDec, 0, sizeof( SKP_Silk_decoder_state ) );
+
+ /* Used to deactivate e.g. LSF interpolation and fluctuation reduction */
+ psDec->first_frame_after_reset = 1;
+ psDec->prev_inv_gain_Q16 = 65536;
+
+ /* Reset CNG state */
+ SKP_Silk_CNG_Reset( psDec );
+
+ /* Reset PLC state */
+ SKP_Silk_PLC_Reset( psDec );
+
+ return(0);
+}
+
--- /dev/null
+++ b/src_common/SKP_Silk_dec_API.c
@@ -1,0 +1,284 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include "SKP_Silk_SDK_API.h"
+#include "SKP_Silk_main.h"
+
+/* Decoder Super Struct */
+typedef struct {
+ SKP_Silk_decoder_state channel_state[ DECODER_NUM_CHANNELS ];
+ stereo_state sStereo;
+ SKP_int nChannels;
+} SKP_Silk_decoder;
+
+
+/*********************/
+/* Decoder functions */
+/*********************/
+
+SKP_int SKP_Silk_SDK_Get_Decoder_Size( SKP_int32 *decSizeBytes )
+{
+ SKP_int ret = SKP_SILK_NO_ERROR;
+
+ *decSizeBytes = sizeof( SKP_Silk_decoder );
+
+ return ret;
+}
+
+/* Reset decoder state */
+SKP_int SKP_Silk_SDK_InitDecoder(
+ void* decState /* I/O: State */
+)
+{
+ SKP_int n, ret = SKP_SILK_NO_ERROR;
+ SKP_Silk_decoder_state *channel_state = ((SKP_Silk_decoder *)decState)->channel_state;
+
+ for( n = 0; n < DECODER_NUM_CHANNELS; n++ ) {
+ ret = SKP_Silk_init_decoder( &channel_state[ n ] );
+ }
+
+ return ret;
+}
+
+/* Decode a frame */
+SKP_int SKP_Silk_SDK_Decode(
+ void* decState, /* I/O: State */
+ SKP_SILK_SDK_DecControlStruct* decControl, /* I/O: Control Structure */
+ SKP_int lostFlag, /* I: 0: no loss, 1 loss, 2 decode FEC */
+ SKP_int newPacketFlag, /* I: Indicates first decoder call for this packet */
+ ec_dec *psRangeDec, /* I/O Compressor data structure */
+ SKP_int16 *samplesOut, /* O: Decoded output speech vector */
+ SKP_int32 *nSamplesOut /* O: Number of samples decoded */
+)
+{
+ SKP_int i, n, prev_fs_kHz, doResample, flags, nFlags, MS_predictorIx, ret = SKP_SILK_NO_ERROR;
+ SKP_int32 nSamplesOutDec, LBRR_symbol;
+ SKP_int16 samplesOut1_tmp[ 2 * MAX_FS_KHZ * MAX_FRAME_LENGTH_MS ];
+ SKP_int16 samplesOut2_tmp[ MAX_API_FS_KHZ * MAX_FRAME_LENGTH_MS ];
+ SKP_int16 *dec_out_ptr, *resample_out_ptr;
+ SKP_Silk_decoder *psDec = ( SKP_Silk_decoder * )decState;
+ SKP_Silk_decoder_state *channel_state = psDec->channel_state;
+
+ /**********************************/
+ /* Test if first frame in payload */
+ /**********************************/
+ if( newPacketFlag ) {
+ for( n = 0; n < decControl->nChannels; n++ ) {
+ channel_state[ n ].nFramesDecoded = 0; /* Used to count frames in packet */
+ }
+ }
+
+ /* Save previous sample frequency */
+ prev_fs_kHz = channel_state[ 0 ].fs_kHz;
+
+ if( decControl->nChannels > psDec->nChannels ) {
+ /* Mono -> Stereo transition: init state of second channel and stereo state */
+ SKP_memset( &psDec->sStereo, 0, sizeof( psDec->sStereo ) );
+ ret += SKP_Silk_init_decoder( &channel_state[ 1 ] );
+ }
+ psDec->nChannels = decControl->nChannels;
+
+ for( n = 0; n < decControl->nChannels; n++ ) {
+ if( channel_state[ n ].nFramesDecoded == 0 ) {
+ SKP_int fs_kHz_dec;
+ if( decControl->payloadSize_ms == 10 ) {
+ channel_state[ n ].nFramesPerPacket = 1;
+ channel_state[ n ].nb_subfr = 2;
+ } else if( decControl->payloadSize_ms == 20 ) {
+ channel_state[ n ].nFramesPerPacket = 1;
+ channel_state[ n ].nb_subfr = 4;
+ } else if( decControl->payloadSize_ms == 40 ) {
+ channel_state[ n ].nFramesPerPacket = 2;
+ channel_state[ n ].nb_subfr = 4;
+ } else if( decControl->payloadSize_ms == 60 ) {
+ channel_state[ n ].nFramesPerPacket = 3;
+ channel_state[ n ].nb_subfr = 4;
+ } else {
+ SKP_assert( 0 );
+ return SKP_SILK_DEC_INVALID_FRAME_SIZE;
+ }
+ fs_kHz_dec = ( decControl->internalSampleRate >> 10 ) + 1;
+ if( fs_kHz_dec != 8 && fs_kHz_dec != 12 && fs_kHz_dec != 16 ) {
+ SKP_assert( 0 );
+ return SKP_SILK_DEC_INVALID_SAMPLING_FREQUENCY;
+ }
+ SKP_Silk_decoder_set_fs( &channel_state[ n ], fs_kHz_dec );
+ }
+ }
+
+ if( decControl->API_sampleRate > MAX_API_FS_KHZ * 1000 || decControl->API_sampleRate < 8000 ) {
+ ret = SKP_SILK_DEC_INVALID_SAMPLING_FREQUENCY;
+ return( ret );
+ }
+
+ doResample = SKP_SMULBB( channel_state[ 0 ].fs_kHz, 1000 ) != decControl->API_sampleRate;
+
+ /* Set up pointers to temp buffers */
+ if( doResample || decControl->nChannels == 2 ) {
+ dec_out_ptr = samplesOut1_tmp;
+ } else {
+ dec_out_ptr = samplesOut;
+ }
+ if( decControl->nChannels == 2 ) {
+ resample_out_ptr = samplesOut2_tmp;
+ } else {
+ resample_out_ptr = samplesOut;
+ }
+
+ if( lostFlag != FLAG_PACKET_LOST && channel_state[ 0 ].nFramesDecoded == 0 ) {
+ /* First decoder call for this payload */
+ nFlags = SKP_SMULBB( decControl->nChannels, channel_state[ 0 ].nFramesPerPacket + 1 );
+ flags = SKP_RSHIFT( psRangeDec->buf[ 0 ], 8 - nFlags ) & ( SKP_LSHIFT( 1, nFlags ) - 1 );
+ for( i = 0; i < nFlags; i++ ) {
+ ec_dec_icdf( psRangeDec, SKP_Silk_uniform2_iCDF, 8 );
+ }
+ /* Decode VAD flags and LBRR flag */
+ for( n = decControl->nChannels - 1; n >= 0; n-- ) {
+ channel_state[ n ].LBRR_flag = flags & 1;
+ flags = SKP_RSHIFT( flags, 1 );
+ for( i = channel_state[ n ].nFramesPerPacket - 1; i >= 0 ; i-- ) {
+ channel_state[ n ].VAD_flags[ i ] = flags & 1;
+ flags = SKP_RSHIFT( flags, 1 );
+ }
+ }
+ /* Decode LBRR flags */
+ for( n = 0; n < decControl->nChannels; n++ ) {
+ SKP_memset( channel_state[ n ].LBRR_flags, 0, sizeof( channel_state[ n ].LBRR_flags ) );
+ if( channel_state[ n ].LBRR_flag ) {
+ if( channel_state[ n ].nFramesPerPacket == 1 ) {
+ channel_state[ n ].LBRR_flags[ 0 ] = 1;
+ } else {
+ LBRR_symbol = ec_dec_icdf( psRangeDec, SKP_Silk_LBRR_flags_iCDF_ptr[ channel_state[ n ].nFramesPerPacket - 2 ], 8 ) + 1;
+ for( i = 0; i < channel_state[ n ].nFramesPerPacket; i++ ) {
+ channel_state[ n ].LBRR_flags[ i ] = SKP_RSHIFT( LBRR_symbol, i ) & 1;
+ }
+ }
+ }
+ }
+
+ if( lostFlag == FLAG_DECODE_NORMAL ) {
+ /* Regular decoding: skip all LBRR data */
+ for( i = 0; i < channel_state[ 0 ].nFramesPerPacket; i++ ) {
+ for( n = 0; n < decControl->nChannels; n++ ) {
+ if( channel_state[ n ].LBRR_flags[ i ] ) {
+ SKP_int pulses[ MAX_FRAME_LENGTH ];
+ SKP_Silk_decode_indices( &channel_state[ n ], psRangeDec, i, 1 );
+ SKP_Silk_decode_pulses( psRangeDec, pulses, channel_state[ n ].indices.signalType,
+ channel_state[ n ].indices.quantOffsetType, channel_state[ n ].frame_length );
+ }
+ }
+ }
+ }
+ }
+
+ /* Get MS predictor index */
+ if( decControl->nChannels == 2 ) {
+ MS_predictorIx = ec_dec_icdf( psRangeDec, SKP_Silk_stereo_predictor_iCDF, 8 );
+ }
+
+ /* Call decoder for one frame */
+ for( n = 0; n < decControl->nChannels; n++ ) {
+ ret += SKP_Silk_decode_frame( &channel_state[ n ], psRangeDec, &dec_out_ptr[ n * MAX_FS_KHZ * MAX_FRAME_LENGTH_MS ], &nSamplesOutDec, lostFlag );
+ }
+
+ /* Convert Mid/Side to Left/Right */
+ if( decControl->nChannels == 2 ) {
+ SKP_Silk_stereo_MS_to_LR( &psDec->sStereo, dec_out_ptr, &dec_out_ptr[ MAX_FS_KHZ * MAX_FRAME_LENGTH_MS ], MS_predictorIx, channel_state[ 0 ].fs_kHz, nSamplesOutDec );
+ }
+
+ /* Number of output samples */
+ if( doResample ) {
+ *nSamplesOut = SKP_DIV32( nSamplesOutDec * decControl->API_sampleRate, SKP_SMULBB( channel_state[ 0 ].fs_kHz, 1000 ) );
+ } else {
+ *nSamplesOut = nSamplesOutDec;
+ }
+
+ for( n = 0; n < decControl->nChannels; n++ ) {
+ /* Resample if needed */
+ if( doResample ) {
+ /* Initialize resampler when switching internal or external sampling frequency */
+ if( prev_fs_kHz != channel_state[ n ].fs_kHz || channel_state[ n ].prev_API_sampleRate != decControl->API_sampleRate ) {
+ ret = SKP_Silk_resampler_init( &channel_state[ n ].resampler_state, SKP_SMULBB( channel_state[ n ].fs_kHz, 1000 ), decControl->API_sampleRate );
+ }
+
+ /* Resample the output to API_sampleRate */
+ ret += SKP_Silk_resampler( &channel_state[ n ].resampler_state, resample_out_ptr, &dec_out_ptr[ n * MAX_FS_KHZ * MAX_FRAME_LENGTH_MS ], nSamplesOutDec );
+ } else {
+ resample_out_ptr = &dec_out_ptr[ n * MAX_FS_KHZ * MAX_FRAME_LENGTH_MS ];
+ }
+
+ /* Interleave if needed */
+ if( decControl->nChannels == 2 ) {
+ for( i = 0; i < *nSamplesOut; i++ ) {
+ samplesOut[ n + 2 * i ] = resample_out_ptr[ i ];
+ }
+ }
+
+ channel_state[ n ].prev_API_sampleRate = decControl->API_sampleRate;
+ }
+
+ /* Copy parameters to control stucture */
+ decControl->frameSize = ( SKP_int )*nSamplesOut;
+ decControl->framesPerPayload = ( SKP_int )channel_state[ n ].nFramesPerPacket;
+
+ return ret;
+}
+
+/* Getting table of contents for a packet */
+SKP_int SKP_Silk_SDK_get_TOC(
+ const SKP_uint8 *payload, /* I Payload data */
+ const SKP_int nBytesIn, /* I: Number of input bytes */
+ const SKP_int nFramesPerPayload, /* I: Number of SILK frames per payload */
+ SKP_Silk_TOC_struct *Silk_TOC /* O: Type of content */
+)
+{
+ SKP_int i, flags, ret = SKP_SILK_NO_ERROR;
+
+ if( nBytesIn < 1 ) {
+ return -1;
+ }
+ if( nFramesPerPayload < 0 || nFramesPerPayload > 3 ) {
+ return -1;
+ }
+
+ SKP_memset( Silk_TOC, 0, sizeof( Silk_TOC ) );
+
+ /* For stereo, extract the flags for the mid channel */
+ flags = SKP_RSHIFT( payload[ 0 ], 7 - nFramesPerPayload ) & ( SKP_LSHIFT( 1, nFramesPerPayload + 1 ) - 1 );
+
+ Silk_TOC->inbandFECFlag = flags & 1;
+ for( i = nFramesPerPayload - 1; i >= 0 ; i-- ) {
+ flags = SKP_RSHIFT( flags, 1 );
+ Silk_TOC->VADFlags[ i ] = flags & 1;
+ Silk_TOC->VADFlag |= flags & 1;
+ }
+
+ return ret;
+}
--- /dev/null
+++ b/src_common/SKP_Silk_decode_core.c
@@ -1,0 +1,224 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/**********************************************************/
+/* Core decoder. Performs inverse NSQ operation LTP + LPC */
+/**********************************************************/
+void SKP_Silk_decode_core(
+ SKP_Silk_decoder_state *psDec, /* I/O Decoder state */
+ SKP_Silk_decoder_control *psDecCtrl, /* I Decoder control */
+ SKP_int16 xq[], /* O Decoded speech */
+ const SKP_int pulses[ MAX_FRAME_LENGTH ] /* I Pulse signal */
+)
+{
+ SKP_int i, j, k, lag = 0, start_idx, sLTP_buf_idx, NLSF_interpolation_flag, signalType;
+ SKP_int16 *A_Q12, *B_Q14, *pxq, A_Q12_tmp[ MAX_LPC_ORDER ];
+ SKP_int16 sLTP[ MAX_FRAME_LENGTH ];
+ SKP_int32 LTP_pred_Q14, LPC_pred_Q10, Gain_Q16, inv_gain_Q16, inv_gain_Q32, gain_adj_Q16, rand_seed, offset_Q10;
+ SKP_int32 *pred_lag_ptr, *pexc_Q10, *pres_Q10;
+ SKP_int32 res_Q10[ MAX_SUB_FRAME_LENGTH ];
+ SKP_int32 vec_Q10[ MAX_SUB_FRAME_LENGTH ];
+
+ SKP_assert( psDec->prev_inv_gain_Q16 != 0 );
+
+ offset_Q10 = SKP_Silk_Quantization_Offsets_Q10[ psDec->indices.signalType >> 1 ][ psDec->indices.quantOffsetType ];
+
+ if( psDec->indices.NLSFInterpCoef_Q2 < 1 << 2 ) {
+ NLSF_interpolation_flag = 1;
+ } else {
+ NLSF_interpolation_flag = 0;
+ }
+
+ /* Decode excitation */
+ rand_seed = psDec->indices.Seed;
+ for( i = 0; i < psDec->frame_length; i++ ) {
+ rand_seed = SKP_RAND( rand_seed );
+ psDec->exc_Q10[ i ] = SKP_LSHIFT( ( SKP_int32 )pulses[ i ], 10 );
+ if( psDec->exc_Q10[ i ] > 0 ) {
+ psDec->exc_Q10[ i ] -= QUANT_LEVEL_ADJUST_Q10;
+ } else
+ if( psDec->exc_Q10[ i ] < 0 ) {
+ psDec->exc_Q10[ i ] += QUANT_LEVEL_ADJUST_Q10;
+ }
+ psDec->exc_Q10[ i ] += offset_Q10;
+ psDec->exc_Q10[ i ] ^= SKP_RSHIFT( rand_seed, 31 );
+
+ rand_seed += pulses[ i ];
+ }
+
+#ifdef SAVE_ALL_INTERNAL_DATA
+ DEBUG_STORE_DATA( dec_q.dat, pulses, psDec->frame_length * sizeof( SKP_int ) );
+#endif
+
+ pexc_Q10 = psDec->exc_Q10;
+ pxq = &psDec->outBuf[ psDec->ltp_mem_length ];
+ sLTP_buf_idx = psDec->ltp_mem_length;
+ /* Loop over subframes */
+ for( k = 0; k < psDec->nb_subfr; k++ ) {
+ pres_Q10 = res_Q10;
+ A_Q12 = psDecCtrl->PredCoef_Q12[ k >> 1 ];
+
+ /* Preload LPC coeficients to array on stack. Gives small performance gain */
+ SKP_memcpy( A_Q12_tmp, A_Q12, psDec->LPC_order * sizeof( SKP_int16 ) );
+ B_Q14 = &psDecCtrl->LTPCoef_Q14[ k * LTP_ORDER ];
+ Gain_Q16 = psDecCtrl->Gains_Q16[ k ];
+ signalType = psDec->indices.signalType;
+
+ inv_gain_Q16 = SKP_INVERSE32_varQ( SKP_max( Gain_Q16, 1 ), 32 );
+ inv_gain_Q16 = SKP_min( inv_gain_Q16, SKP_int16_MAX );
+
+ /* Calculate Gain adjustment factor */
+ gain_adj_Q16 = 1 << 16;
+ if( inv_gain_Q16 != psDec->prev_inv_gain_Q16 ) {
+ gain_adj_Q16 = SKP_DIV32_varQ( inv_gain_Q16, psDec->prev_inv_gain_Q16, 16 );
+
+ /* Scale short term state */
+ for( i = 0; i < MAX_LPC_ORDER; i++ ) {
+ psDec->sLPC_Q14[ i ] = SKP_SMULWW( gain_adj_Q16, psDec->sLPC_Q14[ i ] );
+ }
+ }
+
+ /* Save inv_gain */
+ SKP_assert( inv_gain_Q16 != 0 );
+ psDec->prev_inv_gain_Q16 = inv_gain_Q16;
+
+ /* Avoid abrupt transition from voiced PLC to unvoiced normal decoding */
+ if( psDec->lossCnt && psDec->prevSignalType == TYPE_VOICED &&
+ psDec->indices.signalType != TYPE_VOICED && k < MAX_NB_SUBFR/2 ) {
+
+ SKP_memset( B_Q14, 0, LTP_ORDER * sizeof( SKP_int16 ) );
+ B_Q14[ LTP_ORDER/2 ] = SKP_FIX_CONST( 0.25, 14 );
+
+ signalType = TYPE_VOICED;
+ psDecCtrl->pitchL[ k ] = psDec->lagPrev;
+ }
+
+ if( signalType == TYPE_VOICED ) {
+ /* Voiced */
+ lag = psDecCtrl->pitchL[ k ];
+
+ /* Re-whitening */
+ if( ( k & ( 3 - SKP_LSHIFT( NLSF_interpolation_flag, 1 ) ) ) == 0 ) {
+ /* Rewhiten with new A coefs */
+ start_idx = psDec->ltp_mem_length - lag - psDec->LPC_order - LTP_ORDER / 2;
+ SKP_assert( start_idx > 0 );
+
+ SKP_Silk_LPC_analysis_filter( &sLTP[ start_idx ], &psDec->outBuf[ start_idx + k * psDec->subfr_length ],
+ A_Q12, psDec->ltp_mem_length - start_idx, psDec->LPC_order );
+
+ /* After rewhitening the LTP state is unscaled */
+ inv_gain_Q32 = SKP_LSHIFT( inv_gain_Q16, 16 );
+ if( k == 0 ) {
+ /* Do LTP downscaling */
+ inv_gain_Q32 = SKP_LSHIFT( SKP_SMULWB( inv_gain_Q32, psDecCtrl->LTP_scale_Q14 ), 2 );
+ }
+ for( i = 0; i < lag + LTP_ORDER/2; i++ ) {
+ psDec->sLTP_Q16[ sLTP_buf_idx - i - 1 ] = SKP_SMULWB( inv_gain_Q32, sLTP[ psDec->ltp_mem_length - i - 1 ] );
+ }
+ } else {
+ /* Update LTP state when Gain changes */
+ if( gain_adj_Q16 != 1 << 16 ) {
+ for( i = 0; i < lag + LTP_ORDER/2; i++ ) {
+ psDec->sLTP_Q16[ sLTP_buf_idx - i - 1 ] = SKP_SMULWW( gain_adj_Q16, psDec->sLTP_Q16[ sLTP_buf_idx - i - 1 ] );
+ }
+ }
+ }
+ }
+
+ /* Long-term prediction */
+ if( signalType == TYPE_VOICED ) {
+ /* Setup pointer */
+ pred_lag_ptr = &psDec->sLTP_Q16[ sLTP_buf_idx - lag + LTP_ORDER / 2 ];
+ for( i = 0; i < psDec->subfr_length; i++ ) {
+ /* Unrolled loop */
+ LTP_pred_Q14 = SKP_SMULWB( pred_lag_ptr[ 0 ], B_Q14[ 0 ] );
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -1 ], B_Q14[ 1 ] );
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -2 ], B_Q14[ 2 ] );
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -3 ], B_Q14[ 3 ] );
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -4 ], B_Q14[ 4 ] );
+ pred_lag_ptr++;
+
+ /* Generate LPC residual */
+ pres_Q10[ i ] = SKP_ADD32( pexc_Q10[ i ], SKP_RSHIFT_ROUND( LTP_pred_Q14, 4 ) );
+
+ /* Update states */
+ psDec->sLTP_Q16[ sLTP_buf_idx ] = SKP_LSHIFT( pres_Q10[ i ], 6 );
+ sLTP_buf_idx++;
+ }
+ } else {
+ pres_Q10 = pexc_Q10;
+ }
+
+#ifdef SAVE_ALL_INTERNAL_DATA
+ DEBUG_STORE_DATA( dec_exc_Q10.dat, pexc_Q10, psDec->subfr_length * sizeof( SKP_int32 ) );
+ DEBUG_STORE_DATA( dec_res_Q10.dat, pres_Q10, psDec->subfr_length * sizeof( SKP_int32 ) );
+#endif
+
+ for( i = 0; i < psDec->subfr_length; i++ ) {
+ /* Partially unrolled */
+ LPC_pred_Q10 = SKP_SMULWB( psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 1 ], A_Q12_tmp[ 0 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 2 ], A_Q12_tmp[ 1 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 3 ], A_Q12_tmp[ 2 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 4 ], A_Q12_tmp[ 3 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 5 ], A_Q12_tmp[ 4 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 6 ], A_Q12_tmp[ 5 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 7 ], A_Q12_tmp[ 6 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 8 ], A_Q12_tmp[ 7 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 9 ], A_Q12_tmp[ 8 ] );
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - 10 ], A_Q12_tmp[ 9 ] );
+ for( j = 10; j < psDec->LPC_order; j++ ) {
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psDec->sLPC_Q14[ MAX_LPC_ORDER + i - j - 1 ], A_Q12_tmp[ j ] );
+ }
+
+ /* Add prediction to LPC residual */
+ vec_Q10[ i ] = SKP_ADD32( pres_Q10[ i ], LPC_pred_Q10 );
+
+ /* Update states */
+ psDec->sLPC_Q14[ MAX_LPC_ORDER + i ] = SKP_LSHIFT( vec_Q10[ i ], 4 );
+ }
+
+ /* Scale with Gain */
+ for( i = 0; i < psDec->subfr_length; i++ ) {
+ pxq[ i ] = ( SKP_int16 )SKP_SAT16( SKP_RSHIFT_ROUND( SKP_SMULWW( vec_Q10[ i ], Gain_Q16 ), 10 ) );
+ }
+
+ /* Update LPC filter state */
+ SKP_memcpy( psDec->sLPC_Q14, &psDec->sLPC_Q14[ psDec->subfr_length ], MAX_LPC_ORDER * sizeof( SKP_int32 ) );
+ pexc_Q10 += psDec->subfr_length;
+ pxq += psDec->subfr_length;
+ }
+
+ /* Copy to output */
+ SKP_memcpy( xq, &psDec->outBuf[ psDec->ltp_mem_length ], psDec->frame_length * sizeof( SKP_int16 ) );
+
+#ifdef SAVE_ALL_INTERNAL_DATA
+ DEBUG_STORE_DATA( dec_sLTP_Q16.dat, &psDec->sLTP_Q16[ psDec->ltp_mem_length ], psDec->frame_length * sizeof( SKP_int32 ));
+ DEBUG_STORE_DATA( dec_xq.dat, xq, psDec->frame_length * sizeof( SKP_int16 ) );
+#endif
+}
--- /dev/null
+++ b/src_common/SKP_Silk_decode_frame.c
@@ -1,0 +1,134 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+#include "SKP_Silk_PLC.h"
+
+/****************/
+/* Decode frame */
+/****************/
+SKP_int SKP_Silk_decode_frame(
+ SKP_Silk_decoder_state *psDec, /* I/O Pointer to Silk decoder state */
+ ec_dec *psRangeDec, /* I/O Compressor data structure */
+ SKP_int16 pOut[], /* O Pointer to output speech frame */
+ SKP_int32 *pN, /* O Pointer to size of output frame */
+ SKP_int lostFlag /* I 0: no loss, 1 loss, 2 decode fec */
+)
+{
+ SKP_Silk_decoder_control sDecCtrl;
+ SKP_int L, mv_len, ret = 0;
+ SKP_int pulses[ MAX_FRAME_LENGTH ];
+
+TIC(DECODE_FRAME)
+
+ L = psDec->frame_length;
+ sDecCtrl.LTP_scale_Q14 = 0;
+
+ /* Safety checks */
+ SKP_assert( L > 0 && L <= MAX_FRAME_LENGTH );
+
+ if( lostFlag == FLAG_DECODE_NORMAL ||
+ ( lostFlag == FLAG_DECODE_LBRR && psDec->LBRR_flags[ psDec->nFramesDecoded ] == 1 ) )
+ {
+ /*********************************************/
+ /* Decode quantization indices of side info */
+ /*********************************************/
+TIC(decode_indices)
+ SKP_Silk_decode_indices( psDec, psRangeDec, psDec->nFramesDecoded, lostFlag );
+TOC(decode_indices)
+
+ /*********************************************/
+ /* Decode quantization indices of excitation */
+ /*********************************************/
+TIC(decode_pulses)
+ SKP_Silk_decode_pulses( psRangeDec, pulses, psDec->indices.signalType,
+ psDec->indices.quantOffsetType, psDec->frame_length );
+TOC(decode_pulses)
+
+ /********************************************/
+ /* Decode parameters and pulse signal */
+ /********************************************/
+TIC(decode_params)
+ SKP_Silk_decode_parameters( psDec, &sDecCtrl );
+TOC(decode_params)
+
+ /* Update length. Sampling frequency may have changed */
+ L = psDec->frame_length;
+
+ /********************************************************/
+ /* Run inverse NSQ */
+ /********************************************************/
+TIC(decode_core)
+ SKP_Silk_decode_core( psDec, &sDecCtrl, pOut, pulses );
+TOC(decode_core)
+
+ /********************************************************/
+ /* Update PLC state */
+ /********************************************************/
+ SKP_Silk_PLC( psDec, &sDecCtrl, pOut, L, 0 );
+
+ psDec->lossCnt = 0;
+ psDec->prevSignalType = psDec->indices.signalType;
+ SKP_assert( psDec->prevSignalType >= 0 && psDec->prevSignalType <= 2 );
+
+ /* A frame has been decoded without errors */
+ psDec->first_frame_after_reset = 0;
+ } else {
+ /* Handle packet loss by extrapolation */
+ SKP_Silk_PLC( psDec, &sDecCtrl, pOut, L, 1 );
+ }
+
+ /*************************/
+ /* Update output buffer. */
+ /*************************/
+ SKP_assert( psDec->ltp_mem_length >= psDec->frame_length );
+ mv_len = psDec->ltp_mem_length - psDec->frame_length;
+ SKP_memmove( psDec->outBuf, &psDec->outBuf[ psDec->frame_length ], mv_len * sizeof(SKP_int16) );
+ SKP_memcpy( &psDec->outBuf[ mv_len ], pOut, psDec->frame_length * sizeof( SKP_int16 ) );
+
+ /****************************************************************/
+ /* Ensure smooth connection of extrapolated and good frames */
+ /****************************************************************/
+ SKP_Silk_PLC_glue_frames( psDec, &sDecCtrl, pOut, L );
+
+ /************************************************/
+ /* Comfort noise generation / estimation */
+ /************************************************/
+ SKP_Silk_CNG( psDec, &sDecCtrl, pOut, L );
+
+ /* Update some decoder state variables */
+ psDec->lagPrev = sDecCtrl.pitchL[ psDec->nb_subfr - 1 ];
+ psDec->nFramesDecoded++;
+
+ /* Set output frame length */
+ *pN = L;
+
+TOC(DECODE_FRAME)
+
+ return ret;
+}
+
\ No newline at end of file
--- /dev/null
+++ b/src_common/SKP_Silk_decode_indices.c
@@ -1,0 +1,153 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/* Decode side-information parameters from payload */
+void SKP_Silk_decode_indices(
+ SKP_Silk_decoder_state *psDec, /* I/O State */
+ ec_dec *psRangeDec, /* I/O Compressor data structure */
+ SKP_int FrameIndex, /* I Frame number */
+ SKP_int decode_LBRR /* I Flag indicating LBRR data is being decoded */
+)
+{
+ SKP_int i, k, Ix, condCoding;
+ SKP_int decode_absolute_lagIndex, delta_lagIndex;
+ SKP_int16 ec_ix[ MAX_LPC_ORDER ];
+ SKP_uint8 pred_Q8[ MAX_LPC_ORDER ];
+
+ /* Use conditional coding if previous frame available */
+ if( FrameIndex > 0 && ( decode_LBRR == 0 || psDec->LBRR_flags[ FrameIndex - 1 ] == 1 ) ) {
+ condCoding = 1;
+ } else {
+ condCoding = 0;
+ }
+
+ /*******************************************/
+ /* Decode signal type and quantizer offset */
+ /*******************************************/
+ if( decode_LBRR || psDec->VAD_flags[ FrameIndex ] ) {
+ Ix = ec_dec_icdf( psRangeDec, SKP_Silk_type_offset_VAD_iCDF, 8 ) + 2;
+ } else {
+ Ix = ec_dec_icdf( psRangeDec, SKP_Silk_type_offset_no_VAD_iCDF, 8 );
+ }
+ psDec->indices.signalType = (SKP_int8)SKP_RSHIFT( Ix, 1 );
+ psDec->indices.quantOffsetType = (SKP_int8)( Ix & 1 );
+
+ /****************/
+ /* Decode gains */
+ /****************/
+ /* First subframe */
+ if( condCoding ) {
+ /* Conditional coding */
+ psDec->indices.GainsIndices[ 0 ] = (SKP_int8)ec_dec_icdf( psRangeDec, SKP_Silk_delta_gain_iCDF, 8 );
+ } else {
+ /* Independent coding, in two stages: MSB bits followed by 3 LSBs */
+ psDec->indices.GainsIndices[ 0 ] = (SKP_int8)SKP_LSHIFT( ec_dec_icdf( psRangeDec, SKP_Silk_gain_iCDF[ psDec->indices.signalType ], 8 ), 3 );
+ psDec->indices.GainsIndices[ 0 ] += (SKP_int8)ec_dec_icdf( psRangeDec, SKP_Silk_uniform8_iCDF, 8 );
+ }
+
+ /* Remaining subframes */
+ for( i = 1; i < psDec->nb_subfr; i++ ) {
+ psDec->indices.GainsIndices[ i ] = (SKP_int8)ec_dec_icdf( psRangeDec, SKP_Silk_delta_gain_iCDF, 8 );
+ }
+
+ /**********************/
+ /* Decode LSF Indices */
+ /**********************/
+ psDec->indices.NLSFIndices[ 0 ] = (SKP_int8)ec_dec_icdf( psRangeDec, &psDec->psNLSF_CB->CB1_iCDF[ ( psDec->indices.signalType >> 1 ) * psDec->psNLSF_CB->nVectors ], 8 );
+ SKP_Silk_NLSF_unpack( ec_ix, pred_Q8, psDec->psNLSF_CB, psDec->indices.NLSFIndices[ 0 ] );
+ SKP_assert( psDec->psNLSF_CB->order == psDec->LPC_order );
+ for( i = 0; i < psDec->psNLSF_CB->order; i++ ) {
+ Ix = ec_dec_icdf( psRangeDec, &psDec->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 );
+ if( Ix == 0 ) {
+ Ix -= ec_dec_icdf( psRangeDec, SKP_Silk_NLSF_EXT_iCDF, 8 );
+ } else if( Ix == 2 * NLSF_QUANT_MAX_AMPLITUDE ) {
+ Ix += ec_dec_icdf( psRangeDec, SKP_Silk_NLSF_EXT_iCDF, 8 );
+ }
+ psDec->indices.NLSFIndices[ i+1 ] = (SKP_int8)( Ix - NLSF_QUANT_MAX_AMPLITUDE );
+ }
+
+ /* Decode LSF interpolation factor */
+ if( psDec->nb_subfr == MAX_NB_SUBFR ) {
+ psDec->indices.NLSFInterpCoef_Q2 = (SKP_int8)ec_dec_icdf( psRangeDec, SKP_Silk_NLSF_interpolation_factor_iCDF, 8 );
+ } else {
+ psDec->indices.NLSFInterpCoef_Q2 = 4;
+ }
+
+ if( psDec->indices.signalType == TYPE_VOICED )
+ {
+ /*********************/
+ /* Decode pitch lags */
+ /*********************/
+ /* Get lag index */
+ decode_absolute_lagIndex = 1;
+ if( condCoding && psDec->ec_prevSignalType == TYPE_VOICED ) {
+ /* Decode Delta index */
+ delta_lagIndex = (SKP_int16)ec_dec_icdf( psRangeDec, SKP_Silk_pitch_delta_iCDF, 8 );
+ if( delta_lagIndex > 0 ) {
+ delta_lagIndex = delta_lagIndex - 9;
+ psDec->indices.lagIndex = (SKP_int16)( psDec->ec_prevLagIndex + delta_lagIndex );
+ decode_absolute_lagIndex = 0;
+ }
+ }
+ if( decode_absolute_lagIndex ) {
+ /* Absolute decoding */
+ psDec->indices.lagIndex = (SKP_int16)ec_dec_icdf( psRangeDec, SKP_Silk_pitch_lag_iCDF, 8 ) * SKP_RSHIFT( psDec->fs_kHz, 1 );
+ psDec->indices.lagIndex += (SKP_int16)ec_dec_icdf( psRangeDec, psDec->pitch_lag_low_bits_iCDF, 8 );
+ }
+ psDec->ec_prevLagIndex = psDec->indices.lagIndex;
+
+ /* Get countour index */
+ psDec->indices.contourIndex = (SKP_int8)ec_dec_icdf( psRangeDec, psDec->pitch_contour_iCDF, 8 );
+
+ /********************/
+ /* Decode LTP gains */
+ /********************/
+ /* Decode PERIndex value */
+ psDec->indices.PERIndex = (SKP_int8)ec_dec_icdf( psRangeDec, SKP_Silk_LTP_per_index_iCDF, 8 );
+
+ for( k = 0; k < psDec->nb_subfr; k++ ) {
+ psDec->indices.LTPIndex[ k ] = (SKP_int8)ec_dec_icdf( psRangeDec, SKP_Silk_LTP_gain_iCDF_ptrs[ psDec->indices.PERIndex ], 8 );
+ }
+
+ /**********************/
+ /* Decode LTP scaling */
+ /**********************/
+ if( !condCoding ) {
+ psDec->indices.LTP_scaleIndex = (SKP_int8)ec_dec_icdf( psRangeDec, SKP_Silk_LTPscale_iCDF, 8 );
+ } else {
+ psDec->indices.LTP_scaleIndex = 0;
+ }
+ }
+ psDec->ec_prevSignalType = psDec->indices.signalType;
+
+ /***************/
+ /* Decode seed */
+ /***************/
+ psDec->indices.Seed = (SKP_int8)ec_dec_icdf( psRangeDec, SKP_Silk_uniform4_iCDF, 8 );
+}
--- /dev/null
+++ b/src_common/SKP_Silk_decode_parameters.c
@@ -1,0 +1,111 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/* Decode parameters from payload */
+void SKP_Silk_decode_parameters(
+ SKP_Silk_decoder_state *psDec, /* I/O State */
+ SKP_Silk_decoder_control *psDecCtrl /* I/O Decoder control */
+)
+{
+ SKP_int i, k, Ix;
+ SKP_int16 pNLSF_Q15[ MAX_LPC_ORDER ], pNLSF0_Q15[ MAX_LPC_ORDER ];
+ const SKP_int8 *cbk_ptr_Q7;
+
+ /* Dequant Gains */
+ SKP_Silk_gains_dequant( psDecCtrl->Gains_Q16, psDec->indices.GainsIndices,
+ &psDec->LastGainIndex, psDec->nFramesDecoded, psDec->nb_subfr );
+
+ /****************/
+ /* Decode NLSFs */
+ /****************/
+ SKP_Silk_NLSF_decode( pNLSF_Q15, psDec->indices.NLSFIndices, psDec->psNLSF_CB );
+
+ /* Convert NLSF parameters to AR prediction filter coefficients */
+ SKP_Silk_NLSF2A_stable( psDecCtrl->PredCoef_Q12[ 1 ], pNLSF_Q15, psDec->LPC_order );
+
+ /* If just reset, e.g., because internal Fs changed, do not allow interpolation */
+ /* improves the case of packet loss in the first frame after a switch */
+ if( psDec->first_frame_after_reset == 1 ) {
+ psDec->indices.NLSFInterpCoef_Q2 = 4;
+ }
+
+ if( psDec->indices.NLSFInterpCoef_Q2 < 4 ) {
+ /* Calculation of the interpolated NLSF0 vector from the interpolation factor, */
+ /* the previous NLSF1, and the current NLSF1 */
+ for( i = 0; i < psDec->LPC_order; i++ ) {
+ pNLSF0_Q15[ i ] = psDec->prevNLSF_Q15[ i ] + SKP_RSHIFT( SKP_MUL( psDec->indices.NLSFInterpCoef_Q2,
+ pNLSF_Q15[ i ] - psDec->prevNLSF_Q15[ i ] ), 2 );
+ }
+
+ /* Convert NLSF parameters to AR prediction filter coefficients */
+ SKP_Silk_NLSF2A_stable( psDecCtrl->PredCoef_Q12[ 0 ], pNLSF0_Q15, psDec->LPC_order );
+ } else {
+ /* Copy LPC coefficients for first half from second half */
+ SKP_memcpy( psDecCtrl->PredCoef_Q12[ 0 ], psDecCtrl->PredCoef_Q12[ 1 ],
+ psDec->LPC_order * sizeof( SKP_int16 ) );
+ }
+
+ SKP_memcpy( psDec->prevNLSF_Q15, pNLSF_Q15, psDec->LPC_order * sizeof( SKP_int16 ) );
+
+ /* After a packet loss do BWE of LPC coefs */
+ if( psDec->lossCnt ) {
+ SKP_Silk_bwexpander( psDecCtrl->PredCoef_Q12[ 0 ], psDec->LPC_order, BWE_AFTER_LOSS_Q16 );
+ SKP_Silk_bwexpander( psDecCtrl->PredCoef_Q12[ 1 ], psDec->LPC_order, BWE_AFTER_LOSS_Q16 );
+ }
+
+ if( psDec->indices.signalType == TYPE_VOICED ) {
+ /*********************/
+ /* Decode pitch lags */
+ /*********************/
+
+ /* Decode pitch values */
+ SKP_Silk_decode_pitch( psDec->indices.lagIndex, psDec->indices.contourIndex, psDecCtrl->pitchL, psDec->fs_kHz, psDec->nb_subfr );
+
+ /* Decode Codebook Index */
+ cbk_ptr_Q7 = SKP_Silk_LTP_vq_ptrs_Q7[ psDec->indices.PERIndex ]; /* set pointer to start of codebook */
+
+ for( k = 0; k < psDec->nb_subfr; k++ ) {
+ Ix = psDec->indices.LTPIndex[ k ];
+ for( i = 0; i < LTP_ORDER; i++ ) {
+ psDecCtrl->LTPCoef_Q14[ k * LTP_ORDER + i ] = SKP_LSHIFT( cbk_ptr_Q7[ Ix * LTP_ORDER + i ], 7 );
+ }
+ }
+
+ /**********************/
+ /* Decode LTP scaling */
+ /**********************/
+ Ix = psDec->indices.LTP_scaleIndex;
+ psDecCtrl->LTP_scale_Q14 = SKP_Silk_LTPScales_table_Q14[ Ix ];
+ } else {
+ SKP_memset( psDecCtrl->pitchL, 0, psDec->nb_subfr * sizeof( SKP_int ) );
+ SKP_memset( psDecCtrl->LTPCoef_Q14, 0, LTP_ORDER * psDec->nb_subfr * sizeof( SKP_int16 ) );
+ psDec->indices.PERIndex = 0;
+ psDecCtrl->LTP_scale_Q14 = 0;
+ }
+}
--- /dev/null
+++ b/src_common/SKP_Silk_decode_pulses.c
@@ -1,0 +1,107 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/*********************************************/
+/* Decode quantization indices of excitation */
+/*********************************************/
+void SKP_Silk_decode_pulses(
+ ec_dec *psRangeDec, /* I/O Compressor data structure */
+ SKP_int pulses[], /* O Excitation signal */
+ const SKP_int signalType, /* I Sigtype */
+ const SKP_int quantOffsetType, /* I quantOffsetType */
+ const SKP_int frame_length /* I Frame length */
+)
+{
+ SKP_int i, j, k, iter, abs_q, nLS, RateLevelIndex;
+ SKP_int sum_pulses[ MAX_NB_SHELL_BLOCKS ], nLshifts[ MAX_NB_SHELL_BLOCKS ];
+ SKP_int *pulses_ptr;
+ const SKP_uint8 *cdf_ptr;
+
+ /*********************/
+ /* Decode rate level */
+ /*********************/
+ RateLevelIndex = ec_dec_icdf( psRangeDec, SKP_Silk_rate_levels_iCDF[ signalType >> 1 ], 8 );
+
+ /* Calculate number of shell blocks */
+ SKP_assert( 1 << LOG2_SHELL_CODEC_FRAME_LENGTH == SHELL_CODEC_FRAME_LENGTH );
+ iter = SKP_RSHIFT( frame_length, LOG2_SHELL_CODEC_FRAME_LENGTH );
+ if( iter * SHELL_CODEC_FRAME_LENGTH < frame_length ){
+ SKP_assert( frame_length == 12 * 10 ); /* Make sure only happens for 10 ms @ 12 kHz */
+ iter++;
+ }
+
+ /***************************************************/
+ /* Sum-Weighted-Pulses Decoding */
+ /***************************************************/
+ cdf_ptr = SKP_Silk_pulses_per_block_iCDF[ RateLevelIndex ];
+ for( i = 0; i < iter; i++ ) {
+ nLshifts[ i ] = 0;
+ sum_pulses[ i ] = ec_dec_icdf( psRangeDec, cdf_ptr, 8 );
+
+ /* LSB indication */
+ while( sum_pulses[ i ] == MAX_PULSES + 1 ) {
+ nLshifts[ i ]++;
+ sum_pulses[ i ] = ec_dec_icdf( psRangeDec, SKP_Silk_pulses_per_block_iCDF[ N_RATE_LEVELS - 1 ], 8 );
+ }
+ }
+
+ /***************************************************/
+ /* Shell decoding */
+ /***************************************************/
+ for( i = 0; i < iter; i++ ) {
+ if( sum_pulses[ i ] > 0 ) {
+ SKP_Silk_shell_decoder( &pulses[ SKP_SMULBB( i, SHELL_CODEC_FRAME_LENGTH ) ], psRangeDec, sum_pulses[ i ] );
+ } else {
+ SKP_memset( &pulses[ SKP_SMULBB( i, SHELL_CODEC_FRAME_LENGTH ) ], 0, SHELL_CODEC_FRAME_LENGTH * sizeof( SKP_int ) );
+ }
+ }
+
+ /***************************************************/
+ /* LSB Decoding */
+ /***************************************************/
+ for( i = 0; i < iter; i++ ) {
+ if( nLshifts[ i ] > 0 ) {
+ nLS = nLshifts[ i ];
+ pulses_ptr = &pulses[ SKP_SMULBB( i, SHELL_CODEC_FRAME_LENGTH ) ];
+ for( k = 0; k < SHELL_CODEC_FRAME_LENGTH; k++ ) {
+ abs_q = pulses_ptr[ k ];
+ for( j = 0; j < nLS; j++ ) {
+ abs_q = SKP_LSHIFT( abs_q, 1 );
+ abs_q += ec_dec_icdf( psRangeDec, SKP_Silk_lsb_iCDF, 8 );
+ }
+ pulses_ptr[ k ] = abs_q;
+ }
+ }
+ }
+
+ /****************************************/
+ /* Decode and add signs to pulse signal */
+ /****************************************/
+ SKP_Silk_decode_signs( psRangeDec, pulses, frame_length, signalType, quantOffsetType, sum_pulses );
+}
--- /dev/null
+++ b/src_common/SKP_Silk_decoder_set_fs.c
@@ -1,0 +1,93 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/* Set decoder sampling rate */
+void SKP_Silk_decoder_set_fs(
+ SKP_Silk_decoder_state *psDec, /* I/O Decoder state pointer */
+ SKP_int fs_kHz /* I Sampling frequency (kHz) */
+)
+{
+ SKP_int frame_length;
+
+ SKP_assert( fs_kHz == 8 || fs_kHz == 12 || fs_kHz == 16 );
+ SKP_assert( psDec->nb_subfr == MAX_NB_SUBFR || psDec->nb_subfr == MAX_NB_SUBFR/2 );
+
+ psDec->subfr_length = SKP_SMULBB( SUB_FRAME_LENGTH_MS, fs_kHz );
+ frame_length = SKP_SMULBB( psDec->nb_subfr, psDec->subfr_length );
+ if( psDec->fs_kHz != fs_kHz || frame_length != psDec->frame_length ) {
+ psDec->fs_kHz = fs_kHz;
+ psDec->frame_length = frame_length;
+ psDec->ltp_mem_length = SKP_SMULBB( LTP_MEM_LENGTH_MS, fs_kHz );
+ if( psDec->fs_kHz == 8 ) {
+ if( psDec->nb_subfr == MAX_NB_SUBFR ) {
+ psDec->pitch_contour_iCDF = SKP_Silk_pitch_contour_NB_iCDF;
+ } else {
+ psDec->pitch_contour_iCDF = SKP_Silk_pitch_contour_10_ms_NB_iCDF;
+ }
+ } else {
+ if( psDec->nb_subfr == MAX_NB_SUBFR ) {
+ psDec->pitch_contour_iCDF = SKP_Silk_pitch_contour_iCDF;
+ } else {
+ psDec->pitch_contour_iCDF = SKP_Silk_pitch_contour_10_ms_iCDF;
+ }
+ }
+ if( psDec->fs_kHz == 8 || psDec->fs_kHz == 12 ) {
+ psDec->LPC_order = MIN_LPC_ORDER;
+ psDec->psNLSF_CB = &SKP_Silk_NLSF_CB_NB_MB;
+ } else {
+ psDec->LPC_order = MAX_LPC_ORDER;
+ psDec->psNLSF_CB = &SKP_Silk_NLSF_CB_WB;
+ }
+
+ /* Reset part of the decoder state */
+ SKP_memset( psDec->sLPC_Q14, 0, sizeof( psDec->sLPC_Q14 ) );
+ SKP_memset( psDec->outBuf, 0, MAX_FRAME_LENGTH * sizeof( SKP_int16 ) );
+ SKP_memset( psDec->prevNLSF_Q15, 0, sizeof( psDec->prevNLSF_Q15 ) );
+
+ psDec->lagPrev = 100;
+ psDec->LastGainIndex = 10;
+ psDec->prevSignalType = TYPE_NO_VOICE_ACTIVITY;
+ psDec->first_frame_after_reset = 1;
+
+ if( fs_kHz == 16 ) {
+ psDec->pitch_lag_low_bits_iCDF = SKP_Silk_uniform8_iCDF;
+ } else if( fs_kHz == 12 ) {
+ psDec->pitch_lag_low_bits_iCDF = SKP_Silk_uniform6_iCDF;
+ } else if( fs_kHz == 8 ) {
+ psDec->pitch_lag_low_bits_iCDF = SKP_Silk_uniform4_iCDF;
+ } else {
+ /* unsupported sampling rate */
+ SKP_assert( 0 );
+ }
+ }
+
+ /* Check that settings are valid */
+ SKP_assert( psDec->frame_length > 0 && psDec->frame_length <= MAX_FRAME_LENGTH );
+}
+
--- /dev/null
+++ b/src_common/SKP_Silk_define.h
@@ -1,0 +1,239 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef SKP_SILK_DEFINE_H
+#define SKP_SILK_DEFINE_H
+
+#include "SKP_Silk_errors.h"
+#include "SKP_Silk_typedef.h"
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/* Max number of encoder channels (1/2) */
+#define ENCODER_NUM_CHANNELS 2
+/* Number of decoder channels (1/2) */
+#define DECODER_NUM_CHANNELS 2
+
+#define MAX_FRAMES_PER_PACKET 3
+
+#ifndef FIXED_POINT
+# define FIXED_POINT 0
+#endif
+
+/* Limits on bitrate */
+#define MIN_TARGET_RATE_BPS 5000
+#define MAX_TARGET_RATE_BPS 80000
+#define TARGET_RATE_TAB_SZ 8
+
+/* Decay time for bitreservoir */
+#define BITRESERVOIR_DECAY_TIME_MS 200
+
+/* LBRR thresholds */
+#define LBRR_NB_MIN_RATE_BPS 9000
+#define LBRR_MB_MIN_RATE_BPS 12000
+#define LBRR_WB_MIN_RATE_BPS 15000
+
+/* DTX settings */
+#define NB_SPEECH_FRAMES_BEFORE_DTX 10 /* eq 200 ms */
+#define MAX_CONSECUTIVE_DTX 20 /* eq 400 ms */
+
+/* Maximum sampling frequency, should be 16 for embedded */
+#define MAX_FS_KHZ 16
+#define MAX_API_FS_KHZ 48
+
+/* Signal types */
+#define TYPE_NO_VOICE_ACTIVITY 0
+#define TYPE_UNVOICED 1
+#define TYPE_VOICED 2
+
+/* Setting for stereo processing */
+#define STEREO_QUANT_STEPS 15
+#define STEREO_QUANT_HYSTERESIS 0.25
+#define STEREO_INTERPOL_LENGTH_MS 10
+
+/* Range of pitch lag estimates */
+#define PITCH_EST_MIN_LAG_MS 2 /* 2 ms -> 500 Hz */
+#define PITCH_EST_MAX_LAG_MS 18 /* 18 ms -> 56 Hz */
+
+/* Number of subframes */
+#define MAX_NB_SUBFR 4
+
+/* Number of samples per frame */
+#define LTP_MEM_LENGTH_MS 20
+#define SUB_FRAME_LENGTH_MS 5
+#define MAX_SUB_FRAME_LENGTH ( SUB_FRAME_LENGTH_MS * MAX_FS_KHZ )
+#define MAX_FRAME_LENGTH_MS ( SUB_FRAME_LENGTH_MS * MAX_NB_SUBFR )
+#define MAX_FRAME_LENGTH ( MAX_FRAME_LENGTH_MS * MAX_FS_KHZ )
+
+/* Milliseconds of lookahead for pitch analysis */
+#define LA_PITCH_MS 2
+#define LA_PITCH_MAX ( LA_PITCH_MS * MAX_FS_KHZ )
+
+/* Order of LPC used in find pitch */
+#define MAX_FIND_PITCH_LPC_ORDER 16
+
+/* Length of LPC window used in find pitch */
+#define FIND_PITCH_LPC_WIN_MS ( 20 + (LA_PITCH_MS << 1) )
+#define FIND_PITCH_LPC_WIN_MS_2_SF ( 10 + (LA_PITCH_MS << 1) )
+#define FIND_PITCH_LPC_WIN_MAX ( FIND_PITCH_LPC_WIN_MS * MAX_FS_KHZ )
+
+/* Milliseconds of lookahead for noise shape analysis */
+#define LA_SHAPE_MS 5
+#define LA_SHAPE_MAX ( LA_SHAPE_MS * MAX_FS_KHZ )
+
+/* Maximum length of LPC window used in noise shape analysis */
+#define SHAPE_LPC_WIN_MAX ( 15 * MAX_FS_KHZ )
+
+/* dB level of lowest gain quantization level */
+#define MIN_QGAIN_DB 2
+/* dB level of highest gain quantization level */
+#define MAX_QGAIN_DB 88
+/* Number of gain quantization levels */
+#define N_LEVELS_QGAIN 64
+/* Max increase in gain quantization index */
+#define MAX_DELTA_GAIN_QUANT 36
+/* Max decrease in gain quantization index */
+#define MIN_DELTA_GAIN_QUANT -4
+
+/* Quantization offsets (multiples of 4) */
+#define OFFSET_VL_Q10 32
+#define OFFSET_VH_Q10 100
+#define OFFSET_UVL_Q10 100
+#define OFFSET_UVH_Q10 240
+
+#define QUANT_LEVEL_ADJUST_Q10 80
+
+/* Maximum numbers of iterations used to stabilize a LPC vector */
+#define MAX_LPC_STABILIZE_ITERATIONS 20
+
+#define MAX_LPC_ORDER 16
+#define MIN_LPC_ORDER 10
+
+/* Find Pred Coef defines */
+#define LTP_ORDER 5
+
+/* LTP quantization settings */
+#define NB_LTP_CBKS 3
+
+/* Flag to use harmonic noise shaping */
+#define USE_HARM_SHAPING 1
+
+/* Max LPC order of noise shaping filters */
+#define MAX_SHAPE_LPC_ORDER 16
+
+#define HARM_SHAPE_FIR_TAPS 3
+
+/* Maximum number of delayed decision states */
+#define MAX_DEL_DEC_STATES 4
+
+#define LTP_BUF_LENGTH 512
+#define LTP_MASK ( LTP_BUF_LENGTH - 1 )
+
+#define DECISION_DELAY 32
+#define DECISION_DELAY_MASK ( DECISION_DELAY - 1 )
+
+/* Number of subframes for excitation entropy coding */
+#define SHELL_CODEC_FRAME_LENGTH 16
+#define LOG2_SHELL_CODEC_FRAME_LENGTH 4
+#define MAX_NB_SHELL_BLOCKS ( MAX_FRAME_LENGTH / SHELL_CODEC_FRAME_LENGTH )
+
+/* Number of rate levels, for entropy coding of excitation */
+#define N_RATE_LEVELS 10
+
+/* Maximum sum of pulses per shell coding frame */
+#define MAX_PULSES 16
+
+#define MAX_MATRIX_SIZE MAX_LPC_ORDER /* Max of LPC Order and LTP order */
+
+#if( MAX_LPC_ORDER > DECISION_DELAY )
+# define NSQ_LPC_BUF_LENGTH MAX_LPC_ORDER
+#else
+# define NSQ_LPC_BUF_LENGTH DECISION_DELAY
+#endif
+
+/***********************/
+/* High pass filtering */
+/***********************/
+#define HIGH_PASS_INPUT 1
+
+/***************************/
+/* Voice activity detector */
+/***************************/
+#define VAD_N_BANDS 4
+
+#define VAD_INTERNAL_SUBFRAMES_LOG2 2
+#define VAD_INTERNAL_SUBFRAMES (1 << VAD_INTERNAL_SUBFRAMES_LOG2)
+
+#define VAD_NOISE_LEVEL_SMOOTH_COEF_Q16 1024 /* Must be < 4096 */
+#define VAD_NOISE_LEVELS_BIAS 50
+
+/* Sigmoid settings */
+#define VAD_NEGATIVE_OFFSET_Q5 128 /* sigmoid is 0 at -128 */
+#define VAD_SNR_FACTOR_Q16 45000
+
+/* smoothing for SNR measurement */
+#define VAD_SNR_SMOOTH_COEF_Q18 4096
+
+/******************/
+/* NLSF quantizer */
+/******************/
+#define NLSF_VQ_MAX_VECTORS 32
+#define NLSF_VQ_MAX_SURVIVORS 16
+#define NLSF_QUANT_MAX_AMPLITUDE 4
+#define NLSF_QUANT_MAX_AMPLITUDE_EXT 10
+#define NLSF_QUANT_LEVEL_ADJ 0.1
+#define NLSF_QUANT_DEL_DEC_STATES_LOG2 2
+#define NLSF_QUANT_DEL_DEC_STATES ( 1 << NLSF_QUANT_DEL_DEC_STATES_LOG2 )
+
+/* Transition filtering for mode switching */
+# define TRANSITION_TIME_MS 5120 // 5120 = 64 * FRAME_LENGTH_MS * ( TRANSITION_INT_NUM - 1 ) = 64*(20*4)
+# define TRANSITION_NB 3 /* Hardcoded in tables */
+# define TRANSITION_NA 2 /* Hardcoded in tables */
+# define TRANSITION_INT_NUM 5 /* Hardcoded in tables */
+# define TRANSITION_FRAMES ( TRANSITION_TIME_MS / MAX_FRAME_LENGTH_MS ) // todo: needs to be made flexible for 10 ms frames
+# define TRANSITION_INT_STEPS ( TRANSITION_FRAMES / ( TRANSITION_INT_NUM - 1 ) )
+
+/* BWE factors to apply after packet loss */
+#define BWE_AFTER_LOSS_Q16 63570
+
+/* Defines for CN generation */
+#define CNG_BUF_MASK_MAX 255 /* 2^floor(log2(MAX_FRAME_LENGTH))-1 */
+#define CNG_GAIN_SMTH_Q16 4634 /* 0.25^(1/4) */
+#define CNG_NLSF_SMTH_Q16 16348 /* 0.25 */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+++ b/src_common/SKP_Silk_enc_API.c
@@ -1,0 +1,385 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+
+#include "SKP_Silk_define.h"
+#include "SKP_Silk_SDK_API.h"
+#include "SKP_Silk_control.h"
+#include "SKP_Silk_typedef.h"
+#include "SKP_Silk_structs.h"
+#include "SKP_Silk_tuning_parameters.h"
+#if FIXED_POINT
+#include "SKP_Silk_main_FIX.h"
+#define SKP_Silk_encoder_state_Fxx SKP_Silk_encoder_state_FIX
+#define SKP_Silk_encode_frame_Fxx SKP_Silk_encode_frame_FIX
+#else
+#include "SKP_Silk_main_FLP.h"
+#define SKP_Silk_encoder_state_Fxx SKP_Silk_encoder_state_FLP
+#define SKP_Silk_encode_frame_Fxx SKP_Silk_encode_frame_FLP
+#endif
+
+/* Encoder Super Struct */
+typedef struct {
+ SKP_Silk_encoder_state_Fxx state_Fxx[ ENCODER_NUM_CHANNELS ];
+ stereo_state sStereo;
+ SKP_int32 nBitsExceeded;
+ SKP_int nChannels;
+ SKP_int timeSinceSwitchAllowed_ms;
+ SKP_int allowBandwidthSwitch;
+} SKP_Silk_encoder;
+
+/****************************************/
+/* Encoder functions */
+/****************************************/
+
+SKP_int SKP_Silk_SDK_Get_Encoder_Size( SKP_int32 *encSizeBytes )
+{
+ SKP_int ret = SKP_SILK_NO_ERROR;
+
+ *encSizeBytes = sizeof( SKP_Silk_encoder );
+
+ return ret;
+}
+
+/*************************/
+/* Init or Reset encoder */
+/*************************/
+SKP_int SKP_Silk_SDK_InitEncoder(
+ void *encState, /* I/O: State */
+ SKP_SILK_SDK_EncControlStruct *encStatus /* O: Control structure */
+)
+{
+ SKP_Silk_encoder *psEnc;
+ SKP_int n, ret = SKP_SILK_NO_ERROR;
+
+ psEnc = (SKP_Silk_encoder *)encState;
+
+ /* Reset encoder */
+ for( n = 0; n < ENCODER_NUM_CHANNELS; n++ ) {
+ if( ret += SKP_Silk_init_encoder( &psEnc->state_Fxx[ n ] ) ) {
+ SKP_assert( 0 );
+ }
+ }
+ SKP_memset( &psEnc->sStereo, 0, sizeof( psEnc->sStereo ) );
+
+ psEnc->nBitsExceeded = 0;
+ psEnc->nChannels = 1;
+
+ /* Read control structure */
+ if( ret += SKP_Silk_SDK_QueryEncoder( encState, encStatus ) ) {
+ SKP_assert( 0 );
+ }
+
+ return ret;
+}
+
+/***************************************/
+/* Read control structure from encoder */
+/***************************************/
+SKP_int SKP_Silk_SDK_QueryEncoder(
+ const void *encState, /* I: State Vector */
+ SKP_SILK_SDK_EncControlStruct *encStatus /* O: Control Structure */
+)
+{
+ SKP_Silk_encoder_state_Fxx *state_Fxx;
+ SKP_int ret = SKP_SILK_NO_ERROR;
+
+ state_Fxx = ((SKP_Silk_encoder *)encState)->state_Fxx;
+
+ encStatus->API_sampleRate = state_Fxx->sCmn.API_fs_Hz;
+ encStatus->maxInternalSampleRate = state_Fxx->sCmn.maxInternal_fs_Hz;
+ encStatus->minInternalSampleRate = state_Fxx->sCmn.minInternal_fs_Hz;
+ encStatus->desiredInternalSampleRate = state_Fxx->sCmn.desiredInternal_fs_Hz;
+ encStatus->payloadSize_ms = state_Fxx->sCmn.PacketSize_ms;
+ encStatus->bitRate = state_Fxx->sCmn.TargetRate_bps;
+ encStatus->packetLossPercentage = state_Fxx->sCmn.PacketLoss_perc;
+ encStatus->complexity = state_Fxx->sCmn.Complexity;
+ encStatus->useInBandFEC = state_Fxx->sCmn.useInBandFEC;
+ encStatus->useDTX = state_Fxx->sCmn.useDTX;
+ encStatus->useCBR = state_Fxx->sCmn.useCBR;
+ encStatus->internalSampleRate = SKP_SMULBB( state_Fxx->sCmn.fs_kHz, 1000 );
+
+ return ret;
+}
+
+/**************************/
+/* Encode frame with Silk */
+/**************************/
+SKP_int SKP_Silk_SDK_Encode(
+ void *encState, /* I/O: State */
+ SKP_SILK_SDK_EncControlStruct *encControl, /* I: Control structure */
+ const SKP_int16 *samplesIn, /* I: Speech sample input vector */
+ SKP_int nSamplesIn, /* I: Number of samples in input vector */
+ ec_enc *psRangeEnc, /* I/O Compressor data structure */
+ SKP_int32 *nBytesOut, /* I/O: Number of bytes in payload (input: Max bytes) */
+ const SKP_int prefillFlag /* I: Flag to indicate prefilling buffers; no coding */
+)
+{
+ SKP_int n, i, nBits, flags, tmp_payloadSize_ms, tmp_complexity, MS_predictorIx = 0, ret = 0;
+ SKP_int nSamplesToBuffer, nBlocksOf10ms, nSamplesFromInput = 0;
+ SKP_int speech_act_thr_for_switch_Q8;
+ SKP_int32 TargetRate_bps, channelRate_bps, LBRR_symbol;
+ SKP_Silk_encoder *psEnc = ( SKP_Silk_encoder * )encState;
+ SKP_int16 buf[ MAX_FRAME_LENGTH_MS * MAX_API_FS_KHZ ];
+
+ /* Check values in encoder control structure */
+ if( ( ret = check_control_input( encControl ) != 0 ) ) {
+ SKP_assert( 0 );
+ return ret;
+ }
+
+ if( encControl->nChannels > psEnc->nChannels ) {
+ /* Mono -> Stereo transition: init state of second channel and stereo state */
+ SKP_memset( &psEnc->sStereo, 0, sizeof( psEnc->sStereo ) );
+ ret += SKP_Silk_init_encoder( &psEnc->state_Fxx[ 1 ] );
+ }
+ psEnc->nChannels = encControl->nChannels;
+
+ nBlocksOf10ms = SKP_DIV32( 100 * nSamplesIn, encControl->API_sampleRate );
+ if( prefillFlag ) {
+ /* Only accept input length of 10 ms */
+ if( nBlocksOf10ms != 1 ) {
+ ret = SKP_SILK_ENC_INPUT_INVALID_NO_OF_SAMPLES;
+ SKP_assert( 0 );
+ return ret;
+ }
+ /* Reset Encoder */
+ for( n = 0; n < encControl->nChannels; n++ ) {
+ if( ret = SKP_Silk_init_encoder( &psEnc->state_Fxx[ n ] ) ) {
+ SKP_assert( 0 );
+ }
+ }
+ tmp_payloadSize_ms = encControl->payloadSize_ms;
+ encControl->payloadSize_ms = 10;
+ tmp_complexity = encControl->complexity;
+ encControl->complexity = 0;
+ for( n = 0; n < encControl->nChannels; n++ ) {
+ psEnc->state_Fxx[ n ].sCmn.controlled_since_last_payload = 0;
+ psEnc->state_Fxx[ n ].sCmn.prefillFlag = 1;
+ }
+ } else {
+ /* Only accept input lengths that are a multiple of 10 ms */
+ if( nBlocksOf10ms * encControl->API_sampleRate != 100 * nSamplesIn || nSamplesIn < 0 ) {
+ ret = SKP_SILK_ENC_INPUT_INVALID_NO_OF_SAMPLES;
+ SKP_assert( 0 );
+ return ret;
+ }
+ /* Make sure no more than one packet can be produced */
+ if( 1000 * (SKP_int32)nSamplesIn > encControl->payloadSize_ms * encControl->API_sampleRate ) {
+ ret = SKP_SILK_ENC_INPUT_INVALID_NO_OF_SAMPLES;
+ SKP_assert( 0 );
+ return ret;
+ }
+ }
+
+ TargetRate_bps = SKP_RSHIFT32( encControl->bitRate, encControl->nChannels - 1 );
+ for( n = 0; n < encControl->nChannels; n++ ) {
+ if( ( ret = SKP_Silk_control_encoder( &psEnc->state_Fxx[ n ], encControl, TargetRate_bps, psEnc->allowBandwidthSwitch ) ) != 0 ) {
+ SKP_assert( 0 );
+ return ret;
+ }
+ }
+ SKP_assert( encControl->nChannels == 1 || psEnc->state_Fxx[ 0 ].sCmn.fs_kHz == psEnc->state_Fxx[ 1 ].sCmn.fs_kHz );
+
+ /* Input buffering/resampling and encoding */
+ while( 1 ) {
+ nSamplesToBuffer = psEnc->state_Fxx[ 0 ].sCmn.frame_length - psEnc->state_Fxx[ 0 ].sCmn.inputBufIx;
+ nSamplesToBuffer = SKP_min( nSamplesToBuffer, 10 * nBlocksOf10ms * psEnc->state_Fxx[ 0 ].sCmn.fs_kHz );
+ nSamplesFromInput = SKP_DIV32_16( nSamplesToBuffer * psEnc->state_Fxx[ 0 ].sCmn.API_fs_Hz, psEnc->state_Fxx[ 0 ].sCmn.fs_kHz * 1000 );
+ /* Resample and write to buffer */
+ if( encControl->nChannels == 2 ) {
+ for( n = 0; n < nSamplesFromInput; n++ ) {
+ buf[ n ] = samplesIn[ 2 * n ];
+ }
+ ret += SKP_Silk_resampler( &psEnc->state_Fxx[ 0 ].sCmn.resampler_state,
+ &psEnc->state_Fxx[ 0 ].sCmn.inputBuf[ psEnc->state_Fxx[ 0 ].sCmn.inputBufIx ], buf, nSamplesFromInput );
+ psEnc->state_Fxx[ 0 ].sCmn.inputBufIx += nSamplesToBuffer;
+
+ nSamplesToBuffer = psEnc->state_Fxx[ 1 ].sCmn.frame_length - psEnc->state_Fxx[ 1 ].sCmn.inputBufIx;
+ nSamplesToBuffer = SKP_min( nSamplesToBuffer, 10 * nBlocksOf10ms * psEnc->state_Fxx[ 1 ].sCmn.fs_kHz );
+ for( n = 0; n < nSamplesFromInput; n++ ) {
+ buf[ n ] = samplesIn[ 2 * n + 1 ];
+ }
+ ret += SKP_Silk_resampler( &psEnc->state_Fxx[ 1 ].sCmn.resampler_state,
+ &psEnc->state_Fxx[ 1 ].sCmn.inputBuf[ psEnc->state_Fxx[ 1 ].sCmn.inputBufIx ], buf, nSamplesFromInput );
+ psEnc->state_Fxx[ 1 ].sCmn.inputBufIx += nSamplesToBuffer;
+ } else {
+ SKP_assert( encControl->nChannels == 1 );
+ ret += SKP_Silk_resampler( &psEnc->state_Fxx[ 0 ].sCmn.resampler_state,
+ &psEnc->state_Fxx[ 0 ].sCmn.inputBuf[ psEnc->state_Fxx[ 0 ].sCmn.inputBufIx ], samplesIn, nSamplesFromInput );
+ psEnc->state_Fxx[ 0 ].sCmn.inputBufIx += nSamplesToBuffer;
+ }
+ samplesIn += nSamplesFromInput * encControl->nChannels;
+ nSamplesIn -= nSamplesFromInput;
+
+ /* Default */
+ psEnc->allowBandwidthSwitch = 0;
+
+ /* Silk encoder */
+ if( psEnc->state_Fxx[ 0 ].sCmn.inputBufIx >= psEnc->state_Fxx[ 0 ].sCmn.frame_length ) {
+ /* Enough data in input buffer, so encode */
+ SKP_assert( psEnc->state_Fxx[ 0 ].sCmn.inputBufIx == psEnc->state_Fxx[ 0 ].sCmn.frame_length );
+ SKP_assert( encControl->nChannels == 1 || psEnc->state_Fxx[ 1 ].sCmn.inputBufIx == psEnc->state_Fxx[ 1 ].sCmn.frame_length );
+
+ /* Deal with LBRR data */
+ if( psEnc->state_Fxx[ 0 ].sCmn.nFramesAnalyzed == 0 && !prefillFlag ) {
+ /* Create space at start of payload for VAD and FEC flags */
+ SKP_uint8 iCDF[ 2 ] = { 0, 0 };
+ iCDF[ 0 ] = 256 - SKP_RSHIFT( 256, ( psEnc->state_Fxx[ 0 ].sCmn.nFramesPerPacket + 1 ) * encControl->nChannels );
+ ec_enc_icdf( psRangeEnc, 0, iCDF, 8 );
+
+ /* Encode any LBRR data from previous packet */
+ /* Encode LBRR flags */
+ for( n = 0; n < encControl->nChannels; n++ ) {
+ LBRR_symbol = 0;
+ for( i = 0; i < psEnc->state_Fxx[ n ].sCmn.nFramesPerPacket; i++ ) {
+ LBRR_symbol |= SKP_LSHIFT( psEnc->state_Fxx[ n ].sCmn.LBRR_flags[ i ], i );
+ }
+ psEnc->state_Fxx[ n ].sCmn.LBRR_flag = LBRR_symbol > 0 ? 1 : 0;
+ if( LBRR_symbol && psEnc->state_Fxx[ n ].sCmn.nFramesPerPacket > 1 ) {
+ ec_enc_icdf( psRangeEnc, LBRR_symbol - 1, SKP_Silk_LBRR_flags_iCDF_ptr[ psEnc->state_Fxx[ n ].sCmn.nFramesPerPacket - 2 ], 8 );
+ }
+ }
+
+ /* Code LBRR indices and excitation signals */
+ for( i = 0; i < psEnc->state_Fxx[ 0 ].sCmn.nFramesPerPacket; i++ ) {
+ for( n = 0; n < encControl->nChannels; n++ ) {
+ if( psEnc->state_Fxx[ n ].sCmn.LBRR_flags[ i ] ) {
+ SKP_Silk_encode_indices( &psEnc->state_Fxx[ n ].sCmn, psRangeEnc, i, 1 );
+ SKP_Silk_encode_pulses( psRangeEnc, psEnc->state_Fxx[ n ].sCmn.indices_LBRR[i].signalType, psEnc->state_Fxx[ n ].sCmn.indices_LBRR[i].quantOffsetType,
+ psEnc->state_Fxx[ n ].sCmn.pulses_LBRR[ i ], psEnc->state_Fxx[ n ].sCmn.frame_length );
+ }
+ }
+ }
+
+ /* Reset LBRR flags */
+ for( n = 0; n < encControl->nChannels; n++ ) {
+ SKP_memset( psEnc->state_Fxx[ n ].sCmn.LBRR_flags, 0, sizeof( psEnc->state_Fxx[ n ].sCmn.LBRR_flags ) );
+ }
+ }
+
+ /* Convert Left/Right to Mid/Side */
+ if( encControl->nChannels == 2 ) {
+ SKP_Silk_stereo_LR_to_MS( &psEnc->sStereo, psEnc->state_Fxx[ 0 ].sCmn.inputBuf, psEnc->state_Fxx[ 1 ].sCmn.inputBuf,
+ &MS_predictorIx, psEnc->state_Fxx[ 0 ].sCmn.fs_kHz, psEnc->state_Fxx[ 0 ].sCmn.frame_length );
+ ec_enc_icdf( psRangeEnc, MS_predictorIx, SKP_Silk_stereo_predictor_iCDF, 8 );
+ }
+
+
+ /* Total target bits for packet */
+ nBits = SKP_DIV32_16( SKP_MUL( encControl->bitRate, encControl->payloadSize_ms ), 1000 );
+ /* Subtract bits already used */
+ nBits -= ec_tell( psRangeEnc );
+ /* Divide by number of uncoded frames left in packet */
+ nBits = SKP_DIV32_16( nBits, psEnc->state_Fxx[ 0 ].sCmn.nFramesPerPacket - psEnc->state_Fxx[ 0 ].sCmn.nFramesAnalyzed );
+ /* Convert to bits/second */
+ if( encControl->payloadSize_ms == 10 ) {
+ TargetRate_bps = SKP_SMULBB( nBits, 100 );
+ } else {
+ TargetRate_bps = SKP_SMULBB( nBits, 50 );
+ }
+ /* Subtract fraction of bits in excess of target in previous packets */
+ TargetRate_bps -= SKP_DIV32_16( SKP_MUL( psEnc->nBitsExceeded, 1000 ), BITRESERVOIR_DECAY_TIME_MS );
+ /* Don't exceed input bitrate */
+ TargetRate_bps = SKP_min( TargetRate_bps, encControl->bitRate );
+
+ /* Encode */
+ for( n = 0; n < encControl->nChannels; n++ ) {
+ /* For stereo coding, allocate 60% of the bitrate to mid and 40% to side */
+ if( encControl->nChannels == 1 ) {
+ channelRate_bps = TargetRate_bps;
+ } else if( n == 0 ) {
+ channelRate_bps = SKP_SMULWW( TargetRate_bps, SKP_FIX_CONST( 0.6, 16 ) );
+ } else {
+ channelRate_bps = SKP_SMULWB( TargetRate_bps, SKP_FIX_CONST( 0.4, 16 ) );
+ }
+ SKP_Silk_control_SNR( &psEnc->state_Fxx[ n ].sCmn, channelRate_bps );
+ //SKP_Silk_control_SNR( &psEnc->state_Fxx[ n ].sCmn, TargetRate_bps / 2 );
+ if( ( ret = SKP_Silk_encode_frame_Fxx( &psEnc->state_Fxx[ n ], nBytesOut, psRangeEnc ) ) != 0 ) {
+ SKP_assert( 0 );
+ }
+ psEnc->state_Fxx[ n ].sCmn.controlled_since_last_payload = 0;
+ psEnc->state_Fxx[ n ].sCmn.inputBufIx = 0;
+ }
+
+ /* Insert VAD and FEC flags at beginning of bitstream */
+ if( *nBytesOut > 0 ) {
+ flags = 0;
+ for( n = 0; n < encControl->nChannels; n++ ) {
+ for( i = 0; i < psEnc->state_Fxx[ n ].sCmn.nFramesPerPacket; i++ ) {
+ flags = SKP_LSHIFT( flags, 1 );
+ flags |= psEnc->state_Fxx[ n ].sCmn.VAD_flags[ i ];
+ }
+ flags = SKP_LSHIFT( flags, 1 );
+ flags |= psEnc->state_Fxx[ n ].sCmn.LBRR_flag;
+ }
+ ec_enc_patch_initial_bits( psRangeEnc, flags, ( psEnc->state_Fxx[ 0 ].sCmn.nFramesPerPacket + 1 ) * encControl->nChannels );
+
+ /* Return zero bytes if DTXed */
+ if( psEnc->state_Fxx[ 0 ].sCmn.inDTX && ( encControl->nChannels == 1 || psEnc->state_Fxx[ 1 ].sCmn.inDTX ) ) {
+ *nBytesOut = 0;
+ }
+
+ psEnc->nBitsExceeded += *nBytesOut * 8;
+ psEnc->nBitsExceeded -= SKP_DIV32_16( SKP_MUL( encControl->bitRate, encControl->payloadSize_ms ), 1000 );
+ psEnc->nBitsExceeded = SKP_LIMIT( psEnc->nBitsExceeded, 0, 10000 );
+
+ /* Update flag indicating if bandwidth switching is allowed */
+ speech_act_thr_for_switch_Q8 = SKP_SMLAWB( SKP_FIX_CONST( SPEECH_ACTIVITY_DTX_THRES, 8 ),
+ SKP_FIX_CONST( ( 1 - SPEECH_ACTIVITY_DTX_THRES ) / MAX_BANDWIDTH_SWITCH_DELAY_MS, 16 + 8 ), psEnc->timeSinceSwitchAllowed_ms );
+ if( psEnc->state_Fxx[ 0 ].sCmn.speech_activity_Q8 < speech_act_thr_for_switch_Q8 ) {
+ psEnc->allowBandwidthSwitch = 1;
+ psEnc->timeSinceSwitchAllowed_ms = 0;
+ } else {
+ psEnc->allowBandwidthSwitch = 0;
+ psEnc->timeSinceSwitchAllowed_ms += encControl->payloadSize_ms;
+ }
+ }
+
+ if( nSamplesIn == 0 ) {
+ break;
+ }
+ } else {
+ break;
+ }
+ }
+
+ encControl->allowBandwidthSwitch = psEnc->allowBandwidthSwitch;
+ encControl->inWBmodeWithoutVariableLP = ( psEnc->state_Fxx[ 0 ].sCmn.fs_kHz == 16 ) && ( psEnc->state_Fxx[ 0 ].sCmn.sLP.mode == 0 );
+ encControl->internalSampleRate = SKP_SMULBB( psEnc->state_Fxx[ 0 ].sCmn.fs_kHz, 1000 );
+ if( prefillFlag ) {
+ encControl->payloadSize_ms = tmp_payloadSize_ms;
+ encControl->complexity = tmp_complexity;
+ for( n = 0; n < encControl->nChannels; n++ ) {
+ psEnc->state_Fxx[ n ].sCmn.controlled_since_last_payload = 0;
+ psEnc->state_Fxx[ n ].sCmn.prefillFlag = 0;
+ }
+ }
+
+ return ret;
+}
+
--- /dev/null
+++ b/src_common/SKP_Silk_encode_indices.c
@@ -1,0 +1,246 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/* Encode side-information parameters to payload */
+void SKP_Silk_encode_indices(
+ SKP_Silk_encoder_state *psEncC, /* I/O Encoder state */
+ ec_enc *psRangeEnc, /* I/O Compressor data structure */
+ SKP_int FrameIndex, /* I Frame number */
+ SKP_int encode_LBRR /* I Flag indicating LBRR data is being encoded */
+)
+{
+ SKP_int i, k, condCoding, typeOffset;
+ SKP_int encode_absolute_lagIndex, delta_lagIndex;
+ SKP_int16 ec_ix[ MAX_LPC_ORDER ];
+ SKP_uint8 pred_Q8[ MAX_LPC_ORDER ];
+ const SideInfoIndices *psIndices;
+#if SAVE_ALL_INTERNAL_DATA
+ SKP_int nBytes_lagIndex, nBytes_contourIndex, nBytes_LTP;
+ SKP_int nBytes_after, nBytes_before;
+#endif
+
+ /* Use conditional coding if previous frame available */
+ if( FrameIndex > 0 && ( encode_LBRR == 0 || psEncC->LBRR_flags[ FrameIndex - 1 ] == 1 ) ) {
+ condCoding = 1;
+ } else {
+ condCoding = 0;
+ }
+
+ if( encode_LBRR ) {
+ psIndices = &psEncC->indices_LBRR[ FrameIndex ];
+ } else {
+ psIndices = &psEncC->indices;
+ }
+
+ /*******************************************/
+ /* Encode signal type and quantizer offset */
+ /*******************************************/
+ typeOffset = 2 * psIndices->signalType + psIndices->quantOffsetType;
+ SKP_assert( typeOffset >= 0 && typeOffset < 6 );
+ SKP_assert( encode_LBRR == 0 || typeOffset >= 2 );
+ if( encode_LBRR || typeOffset >= 2 ) {
+ ec_enc_icdf( psRangeEnc, typeOffset - 2, SKP_Silk_type_offset_VAD_iCDF, 8 );
+ } else {
+ ec_enc_icdf( psRangeEnc, typeOffset, SKP_Silk_type_offset_no_VAD_iCDF, 8 );
+ }
+
+ /****************/
+ /* Encode gains */
+ /****************/
+#ifdef SAVE_ALL_INTERNAL_DATA
+ nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
+#endif
+ /* first subframe */
+ if( condCoding ) {
+ /* conditional coding */
+ SKP_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 );
+ ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ], SKP_Silk_delta_gain_iCDF, 8 );
+ } else {
+ /* independent coding, in two stages: MSB bits followed by 3 LSBs */
+ SKP_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < N_LEVELS_QGAIN );
+ ec_enc_icdf( psRangeEnc, SKP_RSHIFT( psIndices->GainsIndices[ 0 ], 3 ), SKP_Silk_gain_iCDF[ psIndices->signalType ], 8 );
+ ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ] & 7, SKP_Silk_uniform8_iCDF, 8 );
+ }
+
+ /* remaining subframes */
+ for( i = 1; i < psEncC->nb_subfr; i++ ) {
+ SKP_assert( psIndices->GainsIndices[ i ] >= 0 && psIndices->GainsIndices[ i ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 );
+ ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ i ], SKP_Silk_delta_gain_iCDF, 8 );
+ }
+
+#ifdef SAVE_ALL_INTERNAL_DATA
+ nBytes_after = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
+ nBytes_after -= nBytes_before; // bytes just added
+ DEBUG_STORE_DATA( nBytes_gains.dat, &nBytes_after, sizeof( SKP_int ) );
+#endif
+
+ /****************/
+ /* Encode NLSFs */
+ /****************/
+#ifdef SAVE_ALL_INTERNAL_DATA
+ nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
+#endif
+ ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ 0 ], &psEncC->psNLSF_CB->CB1_iCDF[ ( psIndices->signalType >> 1 ) * psEncC->psNLSF_CB->nVectors ], 8 );
+ SKP_Silk_NLSF_unpack( ec_ix, pred_Q8, psEncC->psNLSF_CB, psIndices->NLSFIndices[ 0 ] );
+ SKP_assert( psEncC->psNLSF_CB->order == psEncC->predictLPCOrder );
+ for( i = 0; i < psEncC->psNLSF_CB->order; i++ ) {
+ if( psIndices->NLSFIndices[ i+1 ] >= NLSF_QUANT_MAX_AMPLITUDE ) {
+ ec_enc_icdf( psRangeEnc, 2 * NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 );
+ ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, SKP_Silk_NLSF_EXT_iCDF, 8 );
+ } else if( psIndices->NLSFIndices[ i+1 ] <= -NLSF_QUANT_MAX_AMPLITUDE ) {
+ ec_enc_icdf( psRangeEnc, 0, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 );
+ ec_enc_icdf( psRangeEnc, -psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, SKP_Silk_NLSF_EXT_iCDF, 8 );
+ } else {
+ ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] + NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 );
+ }
+ }
+
+ /* Encode NLSF interpolation factor */
+ if( psEncC->nb_subfr == MAX_NB_SUBFR ) {
+ SKP_assert( psEncC->useInterpolatedNLSFs == 1 || psIndices->NLSFInterpCoef_Q2 == ( 1 << 2 ) );
+ SKP_assert( psIndices->NLSFInterpCoef_Q2 >= 0 && psIndices->NLSFInterpCoef_Q2 < 5 );
+ ec_enc_icdf( psRangeEnc, psIndices->NLSFInterpCoef_Q2, SKP_Silk_NLSF_interpolation_factor_iCDF, 8 );
+ }
+
+#ifdef SAVE_ALL_INTERNAL_DATA
+ DEBUG_STORE_DATA( lsf_interpol.dat, &psIndices->NLSFInterpCoef_Q2, sizeof(int) );
+ nBytes_after = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
+ nBytes_after -= nBytes_before; // bytes just added
+ DEBUG_STORE_DATA( nBytes_LSF.dat, &nBytes_after, sizeof( SKP_int ) );
+#endif
+
+ if( psIndices->signalType == TYPE_VOICED )
+ {
+ /*********************/
+ /* Encode pitch lags */
+ /*********************/
+#ifdef SAVE_ALL_INTERNAL_DATA
+ nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
+#endif
+ /* lag index */
+ encode_absolute_lagIndex = 1;
+ if( condCoding && psEncC->ec_prevSignalType == TYPE_VOICED ) {
+ /* Delta Encoding */
+ delta_lagIndex = psIndices->lagIndex - psEncC->ec_prevLagIndex;
+ if( delta_lagIndex < -8 || delta_lagIndex > 11 ) {
+ delta_lagIndex = 0;
+ } else {
+ delta_lagIndex = delta_lagIndex + 9;
+ encode_absolute_lagIndex = 0; /* Only use delta */
+ }
+ SKP_assert( delta_lagIndex >= 0 && delta_lagIndex < 21 );
+ ec_enc_icdf( psRangeEnc, delta_lagIndex, SKP_Silk_pitch_delta_iCDF, 8 );
+ }
+ if( encode_absolute_lagIndex ) {
+ /* Absolute encoding */
+ SKP_int32 pitch_high_bits, pitch_low_bits;
+ pitch_high_bits = SKP_DIV32_16( psIndices->lagIndex, SKP_RSHIFT( psEncC->fs_kHz, 1 ) );
+ pitch_low_bits = psIndices->lagIndex - SKP_SMULBB( pitch_high_bits, SKP_RSHIFT( psEncC->fs_kHz, 1 ) );
+ SKP_assert( pitch_low_bits < psEncC->fs_kHz / 2 );
+ SKP_assert( pitch_high_bits < 32 );
+ ec_enc_icdf( psRangeEnc, pitch_high_bits, SKP_Silk_pitch_lag_iCDF, 8 );
+ ec_enc_icdf( psRangeEnc, pitch_low_bits, psEncC->pitch_lag_low_bits_iCDF, 8 );
+ }
+ psEncC->ec_prevLagIndex = psIndices->lagIndex;
+
+#ifdef SAVE_ALL_INTERNAL_DATA
+ nBytes_after = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
+ nBytes_lagIndex = nBytes_after - nBytes_before; // bytes just added
+#endif
+
+#ifdef SAVE_ALL_INTERNAL_DATA
+ nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
+#endif
+ /* Countour index */
+ SKP_assert( psIndices->contourIndex >= 0 );
+ SKP_assert( ( psIndices->contourIndex < 34 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 4 ) ||
+ ( psIndices->contourIndex < 11 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 4 ) ||
+ ( psIndices->contourIndex < 12 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 2 ) ||
+ ( psIndices->contourIndex < 3 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 2 ) );
+ ec_enc_icdf( psRangeEnc, psIndices->contourIndex, psEncC->pitch_contour_iCDF, 8 );
+#ifdef SAVE_ALL_INTERNAL_DATA
+ nBytes_after = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
+ nBytes_contourIndex = nBytes_after - nBytes_before; // bytes just added
+#endif
+
+ /********************/
+ /* Encode LTP gains */
+ /********************/
+#ifdef SAVE_ALL_INTERNAL_DATA
+ nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
+#endif
+
+ /* PERIndex value */
+ SKP_assert( psIndices->PERIndex >= 0 && psIndices->PERIndex < 3 );
+ ec_enc_icdf( psRangeEnc, psIndices->PERIndex, SKP_Silk_LTP_per_index_iCDF, 8 );
+
+ /* Codebook Indices */
+ for( k = 0; k < psEncC->nb_subfr; k++ ) {
+ SKP_assert( psIndices->LTPIndex[ k ] >= 0 && psIndices->LTPIndex[ k ] < ( 8 << psIndices->PERIndex ) );
+ ec_enc_icdf( psRangeEnc, psIndices->LTPIndex[ k ], SKP_Silk_LTP_gain_iCDF_ptrs[ psIndices->PERIndex ], 8 );
+ }
+
+ /**********************/
+ /* Encode LTP scaling */
+ /**********************/
+ if( !condCoding ) {
+ SKP_assert( psIndices->LTP_scaleIndex >= 0 && psIndices->LTP_scaleIndex < 3 );
+ ec_enc_icdf( psRangeEnc, psIndices->LTP_scaleIndex, SKP_Silk_LTPscale_iCDF, 8 );
+ }
+ SKP_assert( !condCoding || psIndices->LTP_scaleIndex == 0 );
+
+#ifdef SAVE_ALL_INTERNAL_DATA
+ nBytes_after = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
+ nBytes_LTP = nBytes_after - nBytes_before; // bytes just added
+#endif
+ }
+#ifdef SAVE_ALL_INTERNAL_DATA
+ else {
+ // Unvoiced speech
+ nBytes_lagIndex = 0;
+ nBytes_contourIndex = 0;
+ nBytes_LTP = 0;
+ }
+ DEBUG_STORE_DATA( nBytes_lagIndex.dat, &nBytes_lagIndex, sizeof( SKP_int ) );
+ DEBUG_STORE_DATA( nBytes_contourIndex.dat, &nBytes_contourIndex, sizeof( SKP_int ) );
+ DEBUG_STORE_DATA( nBytes_LTP.dat, &nBytes_LTP, sizeof( SKP_int ) );
+#endif
+
+ psEncC->ec_prevSignalType = psIndices->signalType;
+
+#ifdef SAVE_ALL_INTERNAL_DATA
+ nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
+#endif
+
+ /***************/
+ /* Encode seed */
+ /***************/
+ SKP_assert( psIndices->Seed >= 0 && psIndices->Seed < 4 );
+ ec_enc_icdf( psRangeEnc, psIndices->Seed, SKP_Silk_uniform4_iCDF, 8 );
+}
--- /dev/null
+++ b/src_common/SKP_Silk_encode_pulses.c
@@ -1,0 +1,197 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/*********************************************/
+/* Encode quantization indices of excitation */
+/*********************************************/
+
+SKP_INLINE SKP_int combine_and_check( /* return ok */
+ SKP_int *pulses_comb, /* O */
+ const SKP_int *pulses_in, /* I */
+ SKP_int max_pulses, /* I max value for sum of pulses */
+ SKP_int len /* I number of output values */
+)
+{
+ SKP_int k, sum;
+
+ for( k = 0; k < len; k++ ) {
+ sum = pulses_in[ 2 * k ] + pulses_in[ 2 * k + 1 ];
+ if( sum > max_pulses ) {
+ return 1;
+ }
+ pulses_comb[ k ] = sum;
+ }
+
+ return 0;
+}
+
+/* Encode quantization indices of excitation */
+void SKP_Silk_encode_pulses(
+ ec_enc *psRangeEnc, /* I/O compressor data structure */
+ const SKP_int signalType, /* I Sigtype */
+ const SKP_int quantOffsetType, /* I quantOffsetType */
+ SKP_int8 pulses[], /* I quantization indices */
+ const SKP_int frame_length /* I Frame length */
+)
+{
+ SKP_int i, k, j, iter, bit, nLS, scale_down, RateLevelIndex = 0;
+ SKP_int32 abs_q, minSumBits_Q5, sumBits_Q5;
+ SKP_int abs_pulses[ MAX_FRAME_LENGTH ];
+ SKP_int sum_pulses[ MAX_NB_SHELL_BLOCKS ];
+ SKP_int nRshifts[ MAX_NB_SHELL_BLOCKS ];
+ SKP_int pulses_comb[ 8 ];
+ SKP_int *abs_pulses_ptr;
+ const SKP_int8 *pulses_ptr;
+ const SKP_uint8 *cdf_ptr;
+ const SKP_uint8 *nBits_ptr;
+
+ SKP_memset( pulses_comb, 0, 8 * sizeof( SKP_int ) ); // Fixing Valgrind reported problem
+
+ /****************************/
+ /* Prepare for shell coding */
+ /****************************/
+ /* Calculate number of shell blocks */
+ SKP_assert( 1 << LOG2_SHELL_CODEC_FRAME_LENGTH == SHELL_CODEC_FRAME_LENGTH );
+ iter = SKP_RSHIFT( frame_length, LOG2_SHELL_CODEC_FRAME_LENGTH );
+ if( iter * SHELL_CODEC_FRAME_LENGTH < frame_length ){
+ SKP_assert( frame_length == 12 * 10 ); /* Make sure only happens for 10 ms @ 12 kHz */
+ iter++;
+ SKP_memset( &pulses[ frame_length ], 0, SHELL_CODEC_FRAME_LENGTH * sizeof(SKP_int8));
+ }
+
+ /* Take the absolute value of the pulses */
+ for( i = 0; i < iter * SHELL_CODEC_FRAME_LENGTH; i+=4 ) {
+ abs_pulses[i+0] = ( SKP_int )SKP_abs( pulses[ i + 0 ] );
+ abs_pulses[i+1] = ( SKP_int )SKP_abs( pulses[ i + 1 ] );
+ abs_pulses[i+2] = ( SKP_int )SKP_abs( pulses[ i + 2 ] );
+ abs_pulses[i+3] = ( SKP_int )SKP_abs( pulses[ i + 3 ] );
+ }
+
+ /* Calc sum pulses per shell code frame */
+ abs_pulses_ptr = abs_pulses;
+ for( i = 0; i < iter; i++ ) {
+ nRshifts[ i ] = 0;
+
+ while( 1 ) {
+ /* 1+1 -> 2 */
+ scale_down = combine_and_check( pulses_comb, abs_pulses_ptr, SKP_Silk_max_pulses_table[ 0 ], 8 );
+ /* 2+2 -> 4 */
+ scale_down += combine_and_check( pulses_comb, pulses_comb, SKP_Silk_max_pulses_table[ 1 ], 4 );
+ /* 4+4 -> 8 */
+ scale_down += combine_and_check( pulses_comb, pulses_comb, SKP_Silk_max_pulses_table[ 2 ], 2 );
+ /* 8+8 -> 16 */
+ scale_down += combine_and_check( &sum_pulses[ i ], pulses_comb, SKP_Silk_max_pulses_table[ 3 ], 1 );
+
+ if( scale_down ) {
+ /* We need to downscale the quantization signal */
+ nRshifts[ i ]++;
+ for( k = 0; k < SHELL_CODEC_FRAME_LENGTH; k++ ) {
+ abs_pulses_ptr[ k ] = SKP_RSHIFT( abs_pulses_ptr[ k ], 1 );
+ }
+ } else {
+ /* Jump out of while(1) loop and go to next shell coding frame */
+ break;
+ }
+ }
+ abs_pulses_ptr += SHELL_CODEC_FRAME_LENGTH;
+ }
+
+ /**************/
+ /* Rate level */
+ /**************/
+ /* find rate level that leads to fewest bits for coding of pulses per block info */
+ minSumBits_Q5 = SKP_int32_MAX;
+ for( k = 0; k < N_RATE_LEVELS - 1; k++ ) {
+ nBits_ptr = SKP_Silk_pulses_per_block_BITS_Q5[ k ];
+ sumBits_Q5 = SKP_Silk_rate_levels_BITS_Q5[ signalType >> 1 ][ k ];
+ for( i = 0; i < iter; i++ ) {
+ if( nRshifts[ i ] > 0 ) {
+ sumBits_Q5 += nBits_ptr[ MAX_PULSES + 1 ];
+ } else {
+ sumBits_Q5 += nBits_ptr[ sum_pulses[ i ] ];
+ }
+ }
+ if( sumBits_Q5 < minSumBits_Q5 ) {
+ minSumBits_Q5 = sumBits_Q5;
+ RateLevelIndex = k;
+ }
+ }
+ ec_enc_icdf( psRangeEnc, RateLevelIndex, SKP_Silk_rate_levels_iCDF[ signalType >> 1 ], 8 );
+
+ /***************************************************/
+ /* Sum-Weighted-Pulses Encoding */
+ /***************************************************/
+ cdf_ptr = SKP_Silk_pulses_per_block_iCDF[ RateLevelIndex ];
+ for( i = 0; i < iter; i++ ) {
+ if( nRshifts[ i ] == 0 ) {
+ ec_enc_icdf( psRangeEnc, sum_pulses[ i ], cdf_ptr, 8 );
+ } else {
+ ec_enc_icdf( psRangeEnc, MAX_PULSES + 1, cdf_ptr, 8 );
+ for( k = 0; k < nRshifts[ i ] - 1; k++ ) {
+ ec_enc_icdf( psRangeEnc, MAX_PULSES + 1, SKP_Silk_pulses_per_block_iCDF[ N_RATE_LEVELS - 1 ], 8 );
+ }
+ ec_enc_icdf( psRangeEnc, sum_pulses[ i ], SKP_Silk_pulses_per_block_iCDF[ N_RATE_LEVELS - 1 ], 8 );
+ }
+ }
+
+ /******************/
+ /* Shell Encoding */
+ /******************/
+ for( i = 0; i < iter; i++ ) {
+ if( sum_pulses[ i ] > 0 ) {
+ SKP_Silk_shell_encoder( psRangeEnc, &abs_pulses[ i * SHELL_CODEC_FRAME_LENGTH ] );
+ }
+ }
+
+ /****************/
+ /* LSB Encoding */
+ /****************/
+ for( i = 0; i < iter; i++ ) {
+ if( nRshifts[ i ] > 0 ) {
+ pulses_ptr = &pulses[ i * SHELL_CODEC_FRAME_LENGTH ];
+ nLS = nRshifts[ i ] - 1;
+ for( k = 0; k < SHELL_CODEC_FRAME_LENGTH; k++ ) {
+ abs_q = (SKP_int8)SKP_abs( pulses_ptr[ k ] );
+ for( j = nLS; j > 0; j-- ) {
+ bit = SKP_RSHIFT( abs_q, j ) & 1;
+ ec_enc_icdf( psRangeEnc, bit, SKP_Silk_lsb_iCDF, 8 );
+ }
+ bit = abs_q & 1;
+ ec_enc_icdf( psRangeEnc, bit, SKP_Silk_lsb_iCDF, 8 );
+ }
+ }
+ }
+
+#if! USE_CELT_PVQ
+ /****************/
+ /* Encode signs */
+ /****************/
+ SKP_Silk_encode_signs( psRangeEnc, pulses, frame_length, signalType, quantOffsetType, sum_pulses );
+#endif
+}
--- /dev/null
+++ b/src_common/SKP_Silk_gain_quant.c
@@ -1,0 +1,118 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+#define OFFSET ( ( MIN_QGAIN_DB * 128 ) / 6 + 16 * 128 )
+#define SCALE_Q16 ( ( 65536 * ( N_LEVELS_QGAIN - 1 ) ) / ( ( ( MAX_QGAIN_DB - MIN_QGAIN_DB ) * 128 ) / 6 ) )
+#define INV_SCALE_Q16 ( ( 65536 * ( ( ( MAX_QGAIN_DB - MIN_QGAIN_DB ) * 128 ) / 6 ) ) / ( N_LEVELS_QGAIN - 1 ) )
+
+/* Gain scalar quantization with hysteresis, uniform on log scale */
+void SKP_Silk_gains_quant(
+ SKP_int8 ind[ MAX_NB_SUBFR ], /* O gain indices */
+ SKP_int32 gain_Q16[ MAX_NB_SUBFR ], /* I/O gains (quantized out) */
+ SKP_int8 *prev_ind, /* I/O last index in previous frame */
+ const SKP_int conditional, /* I first gain is delta coded if 1 */
+ const SKP_int nb_subfr /* I number of subframes */
+)
+{
+ SKP_int k, double_step_size_threshold;
+
+ for( k = 0; k < nb_subfr; k++ ) {
+ /* Add half of previous quantization error, convert to log scale, scale, floor() */
+ ind[ k ] = SKP_SMULWB( SCALE_Q16, SKP_Silk_lin2log( gain_Q16[ k ] ) - OFFSET );
+
+ /* Round towards previous quantized gain (hysteresis) */
+ if( ind[ k ] < *prev_ind ) {
+ ind[ k ]++;
+ }
+ ind[ k ] = SKP_max_int( ind[ k ], 0 );
+
+ /* Compute delta indices and limit */
+ if( k == 0 && conditional == 0 ) {
+ /* Full index */
+ ind[ k ] = SKP_LIMIT_int( ind[ k ], *prev_ind + MIN_DELTA_GAIN_QUANT, N_LEVELS_QGAIN - 1 );
+ *prev_ind = ind[ k ];
+ } else {
+ /* Delta index */
+ ind[ k ] = ind[ k ] - *prev_ind;
+
+ /* Double the quantization step size for large gain increases, so that the max gain level can be reached */
+ double_step_size_threshold = 2 * MAX_DELTA_GAIN_QUANT - N_LEVELS_QGAIN + *prev_ind;
+ if( ind[ k ] > double_step_size_threshold ) {
+ ind[ k ] = double_step_size_threshold + SKP_RSHIFT( ind[ k ] - double_step_size_threshold + 1, 1 );
+ }
+
+ ind[ k ] = SKP_LIMIT_int( ind[ k ], MIN_DELTA_GAIN_QUANT, MAX_DELTA_GAIN_QUANT );
+
+ /* Accumulate deltas */
+ if( ind[ k ] > double_step_size_threshold ) {
+ *prev_ind += SKP_LSHIFT( ind[ k ], 1 ) - double_step_size_threshold;
+ } else {
+ *prev_ind += ind[ k ];
+ }
+
+ /* Shift to make non-negative */
+ ind[ k ] -= MIN_DELTA_GAIN_QUANT;
+ }
+
+ /* Convert to linear scale and scale */
+ gain_Q16[ k ] = SKP_Silk_log2lin( SKP_min_32( SKP_SMULWB( INV_SCALE_Q16, *prev_ind ) + OFFSET, 3967 ) ); /* 3967 = 31 in Q7 */
+ }
+}
+
+/* Gains scalar dequantization, uniform on log scale */
+void SKP_Silk_gains_dequant(
+ SKP_int32 gain_Q16[ MAX_NB_SUBFR ], /* O quantized gains */
+ const SKP_int8 ind[ MAX_NB_SUBFR ], /* I gain indices */
+ SKP_int8 *prev_ind, /* I/O last index in previous frame */
+ const SKP_int conditional, /* I first gain is delta coded if 1 */
+ const SKP_int nb_subfr /* I number of subframes */
+)
+{
+ SKP_int k, ind_tmp, double_step_size_threshold;
+
+ for( k = 0; k < nb_subfr; k++ ) {
+ if( k == 0 && conditional == 0 ) {
+ *prev_ind = ind[ k ];
+ } else {
+ /* Delta index */
+ ind_tmp = ind[ k ] + MIN_DELTA_GAIN_QUANT;
+
+ /* Accumulate deltas */
+ double_step_size_threshold = 2 * MAX_DELTA_GAIN_QUANT - N_LEVELS_QGAIN + *prev_ind;
+ if( ind_tmp > double_step_size_threshold ) {
+ *prev_ind += SKP_LSHIFT( ind_tmp, 1 ) - double_step_size_threshold;
+ } else {
+ *prev_ind += ind_tmp;
+ }
+ }
+
+ /* Convert to linear scale and scale */
+ gain_Q16[ k ] = SKP_Silk_log2lin( SKP_min_32( SKP_SMULWB( INV_SCALE_Q16, *prev_ind ) + OFFSET, 3967 ) ); /* 3967 = 31 in Q7 */
+ }
+}
--- /dev/null
+++ b/src_common/SKP_Silk_init_encoder.c
@@ -1,0 +1,57 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#if FIXED_POINT
+#include "SKP_Silk_main_FIX.h"
+#define SKP_Silk_encoder_state_Fxx SKP_Silk_encoder_state_FIX
+#else
+#include "SKP_Silk_main_FLP.h"
+#define SKP_Silk_encoder_state_Fxx SKP_Silk_encoder_state_FLP
+#endif
+
+/*********************************/
+/* Initialize Silk Encoder state */
+/*********************************/
+SKP_int SKP_Silk_init_encoder(
+ SKP_Silk_encoder_state_Fxx *psEnc /* I/O Pointer to Silk encoder state */
+) {
+ SKP_int ret = 0;
+
+ /* Clear the entire encoder state */
+ SKP_memset( psEnc, 0, sizeof( SKP_Silk_encoder_state_Fxx ) );
+
+ psEnc->sCmn.variable_HP_smth1_Q15 = 200844; /* = SKP_Silk_log2(70)_Q0; */
+ psEnc->sCmn.variable_HP_smth2_Q15 = 200844; /* = SKP_Silk_log2(70)_Q0; */
+
+ /* Used to deactivate LSF interpolation, fluctuation reduction, pitch prediction */
+ psEnc->sCmn.first_frame_after_reset = 1;
+
+ /* Initialize Silk VAD */
+ ret += SKP_Silk_VAD_Init( &psEnc->sCmn.sVAD );
+
+ return( ret );
+}
--- /dev/null
+++ b/src_common/SKP_Silk_interpolate.c
@@ -1,0 +1,47 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/* Interpolate two vectors */
+void SKP_Silk_interpolate(
+ SKP_int16 xi[ MAX_LPC_ORDER ], /* O interpolated vector */
+ const SKP_int16 x0[ MAX_LPC_ORDER ], /* I first vector */
+ const SKP_int16 x1[ MAX_LPC_ORDER ], /* I second vector */
+ const SKP_int ifact_Q2, /* I interp. factor, weight on 2nd vector */
+ const SKP_int d /* I number of parameters */
+)
+{
+ SKP_int i;
+
+ SKP_assert( ifact_Q2 >= 0 );
+ SKP_assert( ifact_Q2 <= 4 );
+
+ for( i = 0; i < d; i++ ) {
+ xi[ i ] = ( SKP_int16 )SKP_ADD_RSHIFT( x0[ i ], SKP_SMULBB( x1[ i ] - x0[ i ], ifact_Q2 ), 2 );
+ }
+}
--- /dev/null
+++ b/src_common/SKP_Silk_main.h
@@ -1,0 +1,428 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef SKP_SILK_MAIN_H
+#define SKP_SILK_MAIN_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_define.h"
+#include "SKP_Silk_structs.h"
+#include "SKP_Silk_tables.h"
+#include "SKP_Silk_PLC.h"
+#include "SKP_Silk_control.h"
+#include "SKP_debug.h"
+#include "entenc.h"
+#include "entdec.h"
+
+
+/* Uncomment the next line to store intermadiate data to files */
+//#define SAVE_ALL_INTERNAL_DATA 1
+/* Uncomment the next line to force a fixed internal sampling rate (independent of what bitrate is used */
+//#define FORCE_INTERNAL_FS_KHZ 16
+
+
+/* Convert Left/Right stereo signal to adaptive Mid/Side representation */
+void SKP_Silk_stereo_LR_to_MS(
+ stereo_state *state, /* I/O State */
+ SKP_int16 x1[], /* I/O Left input signal, becomes mid signal */
+ SKP_int16 x2[], /* I/O Right input signal, becomes side signal */
+ SKP_int *predictorIx, /* O Index for predictor filter */
+ SKP_int fs_kHz, /* I Samples rate (kHz) */
+ SKP_int frame_length /* I Number of samples */
+);
+
+/* Convert adaptive Mid/Side representation to Left/Right stereo signal */
+void SKP_Silk_stereo_MS_to_LR(
+ stereo_state *state, /* I/O State */
+ SKP_int16 x1[], /* I/O Left input signal, becomes mid signal */
+ SKP_int16 x2[], /* I/O Right input signal, becomes side signal */
+ SKP_int predictorIx, /* I Index for predictor filter */
+ SKP_int fs_kHz, /* I Samples rate (kHz) */
+ SKP_int frame_length /* I Number of samples */
+);
+
+/* Encodes signs of excitation */
+void SKP_Silk_encode_signs(
+ ec_enc *psRangeEnc, /* I/O Compressor data structure */
+ const SKP_int8 pulses[], /* I pulse signal */
+ SKP_int length, /* I length of input */
+ const SKP_int signalType, /* I Signal type */
+ const SKP_int quantOffsetType, /* I Quantization offset type */
+ const SKP_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum of absolute pulses per block */
+);
+
+/* Decodes signs of excitation */
+void SKP_Silk_decode_signs(
+ ec_dec *psRangeDec, /* I/O Compressor data structure */
+ SKP_int pulses[], /* I/O pulse signal */
+ SKP_int length, /* I length of input */
+ const SKP_int signalType, /* I Signal type */
+ const SKP_int quantOffsetType, /* I Quantization offset type */
+ const SKP_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum of absolute pulses per block */
+);
+
+/* Check encoder control struct */
+SKP_int check_control_input(
+ SKP_SILK_SDK_EncControlStruct *encControl /* I: Control structure */
+);
+
+/* Control internal sampling rate */
+SKP_int SKP_Silk_control_audio_bandwidth(
+ SKP_Silk_encoder_state *psEncC /* I/O Pointer to Silk encoder state */
+);
+
+/* Control SNR of redidual quantizer */
+SKP_int SKP_Silk_control_SNR(
+ SKP_Silk_encoder_state *psEncC, /* I/O Pointer to Silk encoder state */
+ SKP_int32 TargetRate_bps /* I Target max bitrate (bps) */
+);
+
+/***************/
+/* Shell coder */
+/***************/
+
+/* Encode quantization indices of excitation */
+void SKP_Silk_encode_pulses(
+ ec_enc *psRangeEnc, /* I/O compressor data structure */
+ const SKP_int signalType, /* I Signal type */
+ const SKP_int quantOffsetType, /* I quantOffsetType */
+ SKP_int8 pulses[], /* I quantization indices */
+ const SKP_int frame_length /* I Frame length */
+);
+
+/* Shell encoder, operates on one shell code frame of 16 pulses */
+void SKP_Silk_shell_encoder(
+ ec_enc *psRangeEnc, /* I/O compressor data structure */
+ const SKP_int *pulses0 /* I data: nonnegative pulse amplitudes */
+);
+
+/* Shell decoder, operates on one shell code frame of 16 pulses */
+void SKP_Silk_shell_decoder(
+ SKP_int *pulses0, /* O data: nonnegative pulse amplitudes */
+ ec_dec *psRangeDec, /* I/O Compressor data structure */
+ const SKP_int pulses4 /* I number of pulses per pulse-subframe */
+);
+
+/* Gain scalar quantization with hysteresis, uniform on log scale */
+void SKP_Silk_gains_quant(
+ SKP_int8 ind[ MAX_NB_SUBFR ], /* O gain indices */
+ SKP_int32 gain_Q16[ MAX_NB_SUBFR ], /* I/O gains (quantized out) */
+ SKP_int8 *prev_ind, /* I/O last index in previous frame */
+ const SKP_int conditional, /* I first gain is delta coded if 1 */
+ const SKP_int nb_subfr /* I number of subframes */
+);
+
+/* Gains scalar dequantization, uniform on log scale */
+void SKP_Silk_gains_dequant(
+ SKP_int32 gain_Q16[ MAX_NB_SUBFR ], /* O quantized gains */
+ const SKP_int8 ind[ MAX_NB_SUBFR ], /* I gain indices */
+ SKP_int8 *prev_ind, /* I/O last index in previous frame */
+ const SKP_int conditional, /* I first gain is delta coded if 1 */
+ const SKP_int nb_subfr /* I number of subframes */
+);
+
+/* Convert NLSF parameters to stable AR prediction filter coefficients */
+void SKP_Silk_NLSF2A_stable(
+ SKP_int16 pAR_Q12[ MAX_LPC_ORDER ], /* O Stabilized AR coefs [LPC_order] */
+ const SKP_int16 pNLSF[ MAX_LPC_ORDER ], /* I NLSF vector [LPC_order] */
+ const SKP_int LPC_order /* I LPC/LSF order */
+);
+
+/* Interpolate two vectors */
+void SKP_Silk_interpolate(
+ SKP_int16 xi[ MAX_LPC_ORDER ], /* O interpolated vector */
+ const SKP_int16 x0[ MAX_LPC_ORDER ], /* I first vector */
+ const SKP_int16 x1[ MAX_LPC_ORDER ], /* I second vector */
+ const SKP_int ifact_Q2, /* I interp. factor, weight on 2nd vector */
+ const SKP_int d /* I number of parameters */
+);
+
+/* LTP tap quantizer */
+void SKP_Silk_quant_LTP_gains(
+ SKP_int16 B_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* I/O (un)quantized LTP gains */
+ SKP_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook Index */
+ SKP_int8 *periodicity_index, /* O Periodicity Index */
+ const SKP_int32 W_Q18[ MAX_NB_SUBFR*LTP_ORDER*LTP_ORDER ], /* I Error Weights in Q18 */
+ SKP_int mu_Q9, /* I Mu value (R/D tradeoff) */
+ SKP_int lowComplexity, /* I Flag for low complexity */
+ const SKP_int nb_subfr /* I number of subframes */
+);
+
+/* Entropy constrained matrix-weighted VQ, for a single input data vector */
+void SKP_Silk_VQ_WMat_EC(
+ SKP_int8 *ind, /* O index of best codebook vector */
+ SKP_int32 *rate_dist_Q14, /* O best weighted quantization error + mu * rate*/
+ const SKP_int16 *in_Q14, /* I input vector to be quantized */
+ const SKP_int32 *W_Q18, /* I weighting matrix */
+ const SKP_int8 *cb_Q7, /* I codebook */
+ const SKP_uint8 *cl_Q5, /* I code length for each codebook vector */
+ const SKP_int mu_Q9, /* I tradeoff between weighted error and rate */
+ SKP_int L /* I number of vectors in codebook */
+);
+
+/***********************************/
+/* Noise shaping quantization (NSQ)*/
+/***********************************/
+void SKP_Silk_NSQ(
+ const SKP_Silk_encoder_state *psEncC, /* I/O Encoder State */
+ SKP_Silk_nsq_state *NSQ, /* I/O NSQ state */
+ SideInfoIndices *psIndices, /* I/O Quantization Indices */
+ const SKP_int16 x[], /* I prefiltered input signal */
+ SKP_int8 pulses[], /* O quantized qulse signal */
+ const SKP_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I Short term prediction coefficients */
+ const SKP_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I Long term prediction coefficients */
+ const SKP_int16 AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I */
+ const SKP_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I */
+ const SKP_int Tilt_Q14[ MAX_NB_SUBFR ], /* I Spectral tilt */
+ const SKP_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I */
+ const SKP_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I */
+ const SKP_int pitchL[ MAX_NB_SUBFR ], /* I */
+ const SKP_int Lambda_Q10, /* I */
+ const SKP_int LTP_scale_Q14 /* I LTP state scaling */
+);
+
+/* Noise shaping using delayed decision */
+void SKP_Silk_NSQ_del_dec(
+ const SKP_Silk_encoder_state *psEncC, /* I/O Encoder State */
+ SKP_Silk_nsq_state *NSQ, /* I/O NSQ state */
+ SideInfoIndices *psIndices, /* I/O Quantization Indices */
+ const SKP_int16 x[], /* I Prefiltered input signal */
+ SKP_int8 pulses[], /* O Quantized pulse signal */
+ const SKP_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I Prediction coefs */
+ const SKP_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I LT prediction coefs */
+ const SKP_int16 AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I */
+ const SKP_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I */
+ const SKP_int Tilt_Q14[ MAX_NB_SUBFR ], /* I Spectral tilt */
+ const SKP_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I */
+ const SKP_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I */
+ const SKP_int pitchL[ MAX_NB_SUBFR ], /* I */
+ const SKP_int Lambda_Q10, /* I */
+ const SKP_int LTP_scale_Q14 /* I LTP state scaling */
+);
+
+/************/
+/* Silk VAD */
+/************/
+/* Initialize the Silk VAD */
+SKP_int SKP_Silk_VAD_Init( /* O Return value, 0 if success */
+ SKP_Silk_VAD_state *psSilk_VAD /* I/O Pointer to Silk VAD state */
+);
+
+/* Silk VAD noise level estimation */
+void SKP_Silk_VAD_GetNoiseLevels(
+ const SKP_int32 pX[ VAD_N_BANDS ], /* I subband energies */
+ SKP_Silk_VAD_state *psSilk_VAD /* I/O Pointer to Silk VAD state */
+);
+
+/* Get speech activity level in Q8 */
+SKP_int SKP_Silk_VAD_GetSA_Q8( /* O Return value, 0 if success */
+ SKP_Silk_encoder_state *psEncC, /* I/O Encoder state */
+ const SKP_int16 pIn[] /* I PCM input */
+);
+
+/* High-pass filter with cutoff frequency adaptation based on pitch lag statistics */
+void SKP_Silk_HP_variable_cutoff(
+ SKP_Silk_encoder_state *psEncC, /* I/O Encoder state */
+ SKP_int16 *out, /* O high-pass filtered output signal */
+ const SKP_int16 *in, /* I input signal */
+ const SKP_int frame_length /* I length of input */
+);
+
+/* Low-pass filter with variable cutoff frequency based on */
+/* piece-wise linear interpolation between elliptic filters */
+/* Start by setting transition_frame_no = 1; */
+void SKP_Silk_LP_variable_cutoff(
+ SKP_Silk_LP_state *psLP, /* I/O LP filter state */
+ SKP_int16 *signal, /* I/O Low-pass filtered output signal */
+ const SKP_int frame_length /* I Frame length */
+);
+
+/******************/
+/* NLSF Quantizer */
+/******************/
+/* Limit, stabilize, convert and quantize NLSFs */
+void SKP_Silk_process_NLSFs(
+ SKP_Silk_encoder_state *psEncC, /* I/O Encoder state */
+ SKP_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */
+ SKP_int16 pNLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */
+ const SKP_int16 prev_NLSFq_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */
+);
+
+SKP_int32 SKP_Silk_NLSF_encode( /* O Returns RD value in Q25 */
+ SKP_int8 *NLSFIndices, /* I Codebook path vector [ LPC_ORDER + 1 ] */
+ SKP_int16 *pNLSF_Q15, /* I/O Quantized NLSF vector [ LPC_ORDER ] */
+ const SKP_Silk_NLSF_CB_struct *psNLSF_CB, /* I Codebook object */
+ const SKP_int16 *pW_Q5, /* I NLSF weight vector [ LPC_ORDER ] */
+ const SKP_int NLSF_mu_Q20, /* I Rate weight for the RD optimization */
+ const SKP_int nSurvivors, /* I Max survivors after first stage */
+ const SKP_int signalType /* I Signal type: 0/1/2 */
+);
+
+/* Compute quantization errors for an LPC_order element input vector for a VQ codebook */
+void SKP_Silk_NLSF_VQ(
+ SKP_int32 err_Q26[], /* O Quantization errors [K] */
+ const SKP_int16 in_Q15[], /* I Input vectors to be quantized [LPC_order] */
+ const SKP_uint8 pCB_Q8[], /* I Codebook vectors [K*LPC_order] */
+ const SKP_int K, /* I Number of codebook vectors */
+ const SKP_int LPC_order /* I Number of LPCs */
+);
+
+/* Delayed-decision quantizer for NLSF residuals */
+SKP_int32 SKP_Silk_NLSF_del_dec_quant( /* O Returns RD value in Q25 */
+ SKP_int8 indices[], /* O Quantization indices [ order ] */
+ const SKP_int16 x_Q10[], /* I Input [ order ] */
+ const SKP_int16 w_Q5[], /* I Weights [ order ] */
+ const SKP_uint8 pred_coef_Q8[], /* I Backward predictor coefs [ order ] */
+ const SKP_int16 ec_ix[], /* I Indices to entropy coding tables [ order ] */
+ const SKP_uint8 ec_rates_Q5[], /* I Rates [] */
+ const SKP_int quant_step_size_Q16, /* I Quantization step size */
+ const SKP_int16 inv_quant_step_size_Q6, /* I Inverse quantization step size */
+ const SKP_int32 mu_Q20, /* I R/D tradeoff */
+ const SKP_int16 order /* I Number of input values */
+);
+
+/* Unpack predictor values and indices for entropy coding tables */
+void SKP_Silk_NLSF_unpack(
+ SKP_int16 ec_ix[], /* O Indices to entropy tales [ LPC_ORDER ] */
+ SKP_uint8 pred_Q8[], /* O LSF predictor [ LPC_ORDER ] */
+ const SKP_Silk_NLSF_CB_struct *psNLSF_CB, /* I Codebook object */
+ const SKP_int CB1_index /* I Index of vector in first LSF codebook */
+);
+
+/***********************/
+/* NLSF vector decoder */
+/***********************/
+void SKP_Silk_NLSF_decode(
+ SKP_int16 *pNLSF_Q15, /* O Quantized NLSF vector [ LPC_ORDER ] */
+ SKP_int8 *NLSFIndices, /* I Codebook path vector [ LPC_ORDER + 1 ] */
+ const SKP_Silk_NLSF_CB_struct *psNLSF_CB /* I Codebook object */
+);
+
+/****************************************************/
+/* Decoder Functions */
+/****************************************************/
+SKP_int SKP_Silk_create_decoder(
+ SKP_Silk_decoder_state **ppsDec /* I/O Decoder state pointer pointer */
+);
+
+SKP_int SKP_Silk_free_decoder(
+ SKP_Silk_decoder_state *psDec /* I/O Decoder state pointer */
+);
+
+SKP_int SKP_Silk_init_decoder(
+ SKP_Silk_decoder_state *psDec /* I/O Decoder state pointer */
+);
+
+/* Set decoder sampling rate */
+void SKP_Silk_decoder_set_fs(
+ SKP_Silk_decoder_state *psDec, /* I/O Decoder state pointer */
+ SKP_int fs_kHz /* I Sampling frequency (kHz) */
+);
+
+/****************/
+/* Decode frame */
+/****************/
+SKP_int SKP_Silk_decode_frame(
+ SKP_Silk_decoder_state *psDec, /* I/O Pointer to Silk decoder state */
+ ec_dec *psRangeDec, /* I/O Compressor data structure */
+ SKP_int16 pOut[], /* O Pointer to output speech frame */
+ SKP_int32 *pN, /* O Pointer to size of output frame */
+ SKP_int lostFlag /* I 0: no loss, 1 loss, 2 decode fec */
+);
+
+/* Decode LBRR side info and excitation */
+void SKP_Silk_LBRR_extract(
+ SKP_Silk_decoder_state *psDec, /* I/O State */
+ ec_dec *psRangeDec /* I/O Compressor data structure */
+);
+
+/* Decode indices from payload v4 Bitstream */
+void SKP_Silk_decode_indices(
+ SKP_Silk_decoder_state *psDec, /* I/O State */
+ ec_dec *psRangeDec, /* I/O Compressor data structure */
+ SKP_int FrameIndex, /* I Frame number */
+ SKP_int decode_LBRR /* I Flag indicating LBRR data is being decoded */
+);
+
+/* Decode parameters from payload */
+void SKP_Silk_decode_parameters(
+ SKP_Silk_decoder_state *psDec, /* I/O State */
+ SKP_Silk_decoder_control *psDecCtrl /* I/O Decoder control */
+);
+
+/* Core decoder. Performs inverse NSQ operation LTP + LPC */
+void SKP_Silk_decode_core(
+ SKP_Silk_decoder_state *psDec, /* I/O Decoder state */
+ SKP_Silk_decoder_control *psDecCtrl, /* I Decoder control */
+ SKP_int16 xq[], /* O Decoded speech */
+ const SKP_int pulses[ MAX_FRAME_LENGTH ] /* I Pulse signal */
+);
+
+/* Decode quantization indices of excitation (Shell coding) */
+void SKP_Silk_decode_pulses(
+ ec_dec *psRangeDec, /* I/O Compressor data structure */
+ SKP_int pulses[], /* O Excitation signal */
+ const SKP_int signalType, /* I Sigtype */
+ const SKP_int quantOffsetType, /* I quantOffsetType */
+ const SKP_int frame_length /* I Frame length */
+);
+
+/******************/
+/* CNG */
+/******************/
+
+/* Reset CNG */
+void SKP_Silk_CNG_Reset(
+ SKP_Silk_decoder_state *psDec /* I/O Decoder state */
+);
+
+/* Updates CNG estimate, and applies the CNG when packet was lost */
+void SKP_Silk_CNG(
+ SKP_Silk_decoder_state *psDec, /* I/O Decoder state */
+ SKP_Silk_decoder_control *psDecCtrl, /* I/O Decoder control */
+ SKP_int16 signal[], /* I/O Signal */
+ SKP_int length /* I Length of residual */
+);
+
+/* Encoding of various parameters */
+void SKP_Silk_encode_indices(
+ SKP_Silk_encoder_state *psEncC, /* I/O Encoder state */
+ ec_enc *psRangeEnc, /* I/O Compressor data structure */
+ SKP_int FrameIndex, /* I Frame number */
+ SKP_int encode_LBRR /* I Flag indicating LBRR data is being encoded */
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+++ b/src_common/SKP_Silk_process_NLSFs.c
@@ -1,0 +1,103 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/* Limit, stabilize, convert and quantize NLSFs */
+void SKP_Silk_process_NLSFs(
+ SKP_Silk_encoder_state *psEncC, /* I/O Encoder state */
+ SKP_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */
+ SKP_int16 pNLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */
+ const SKP_int16 prev_NLSFq_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */
+)
+{
+ SKP_int i, doInterpolate;
+ SKP_int16 pNLSFW_Q5[ MAX_LPC_ORDER ];
+ SKP_int NLSF_mu_Q20;
+ SKP_int32 i_sqr_Q15;
+ SKP_int16 pNLSF0_temp_Q15[ MAX_LPC_ORDER ];
+ SKP_int16 pNLSFW0_temp_Q5[ MAX_LPC_ORDER ];
+
+ SKP_assert( psEncC->speech_activity_Q8 >= 0 );
+ SKP_assert( psEncC->speech_activity_Q8 <= SKP_FIX_CONST( 1.0, 8 ) );
+
+ /***********************/
+ /* Calculate mu values */
+ /***********************/
+ /* NLSF_mu = 0.003 - 0.0015 * psEnc->speech_activity; */
+ NLSF_mu_Q20 = SKP_SMLAWB( SKP_FIX_CONST( 0.003, 20 ), SKP_FIX_CONST( -0.0015, 28 ), psEncC->speech_activity_Q8 );
+ if( psEncC->nb_subfr == 2 ) {
+ /* Multiply by 1.5 for 10 ms packets */
+ NLSF_mu_Q20 = SKP_ADD_RSHIFT( NLSF_mu_Q20, NLSF_mu_Q20, 1 );
+ }
+
+ SKP_assert( NLSF_mu_Q20 > 0 );
+ SKP_assert( NLSF_mu_Q20 <= SKP_FIX_CONST( 0.0045, 20 ) );
+
+ /* Calculate NLSF weights */
+ SKP_Silk_NLSF_VQ_weights_laroia( pNLSFW_Q5, pNLSF_Q15, psEncC->predictLPCOrder );
+
+ /* Update NLSF weights for interpolated NLSFs */
+ doInterpolate = ( psEncC->useInterpolatedNLSFs == 1 ) && ( psEncC->indices.NLSFInterpCoef_Q2 < 4 );
+ if( doInterpolate ) {
+ /* Calculate the interpolated NLSF vector for the first half */
+ SKP_Silk_interpolate( pNLSF0_temp_Q15, prev_NLSFq_Q15, pNLSF_Q15,
+ psEncC->indices.NLSFInterpCoef_Q2, psEncC->predictLPCOrder );
+
+ /* Calculate first half NLSF weights for the interpolated NLSFs */
+ SKP_Silk_NLSF_VQ_weights_laroia( pNLSFW0_temp_Q5, pNLSF0_temp_Q15, psEncC->predictLPCOrder );
+
+ /* Update NLSF weights with contribution from first half */
+ i_sqr_Q15 = SKP_LSHIFT( SKP_SMULBB( psEncC->indices.NLSFInterpCoef_Q2, psEncC->indices.NLSFInterpCoef_Q2 ), 11 );
+ for( i = 0; i < psEncC->predictLPCOrder; i++ ) {
+ pNLSFW_Q5[ i ] = SKP_SMLAWB( SKP_RSHIFT( pNLSFW_Q5[ i ], 1 ), pNLSFW0_temp_Q5[ i ], i_sqr_Q15 );
+ SKP_assert( pNLSFW_Q5[ i ] <= SKP_int16_MAX );
+ SKP_assert( pNLSFW_Q5[ i ] >= 1 );
+ }
+ }
+
+ TIC(NLSF_encode)
+ SKP_Silk_NLSF_encode( psEncC->indices.NLSFIndices, pNLSF_Q15, psEncC->psNLSF_CB, pNLSFW_Q5,
+ NLSF_mu_Q20, psEncC->NLSF_MSVQ_Survivors, psEncC->indices.signalType );
+ TOC(NLSF_encode)
+
+ /* Convert quantized NLSFs back to LPC coefficients */
+ SKP_Silk_NLSF2A_stable( PredCoef_Q12[ 1 ], pNLSF_Q15, psEncC->predictLPCOrder );
+
+ if( doInterpolate ) {
+ /* Calculate the interpolated, quantized LSF vector for the first half */
+ SKP_Silk_interpolate( pNLSF0_temp_Q15, prev_NLSFq_Q15, pNLSF_Q15,
+ psEncC->indices.NLSFInterpCoef_Q2, psEncC->predictLPCOrder );
+
+ /* Convert back to LPC coefficients */
+ SKP_Silk_NLSF2A_stable( PredCoef_Q12[ 0 ], pNLSF0_temp_Q15, psEncC->predictLPCOrder );
+
+ } else {
+ /* Copy LPC coefficients for first half from second half */
+ SKP_memcpy( PredCoef_Q12[ 0 ], PredCoef_Q12[ 1 ], psEncC->predictLPCOrder * sizeof( SKP_int16 ) );
+ }
+}
--- /dev/null
+++ b/src_common/SKP_Silk_quant_LTP_gains.c
@@ -1,0 +1,107 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+void SKP_Silk_quant_LTP_gains(
+ SKP_int16 B_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* I/O (un)quantized LTP gains */
+ SKP_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook Index */
+ SKP_int8 *periodicity_index, /* O Periodicity Index */
+ const SKP_int32 W_Q18[ MAX_NB_SUBFR*LTP_ORDER*LTP_ORDER ], /* I Error Weights in Q18 */
+ SKP_int mu_Q9, /* I Mu value (R/D tradeoff) */
+ SKP_int lowComplexity, /* I Flag for low complexity */
+ const SKP_int nb_subfr /* I number of subframes */
+)
+{
+ SKP_int j, k, cbk_size;
+ SKP_int8 temp_idx[ MAX_NB_SUBFR ];
+ const SKP_uint8 *cl_ptr_Q5;
+ const SKP_int8 *cbk_ptr_Q7;
+ const SKP_int16 *b_Q14_ptr;
+ const SKP_int32 *W_Q18_ptr;
+ SKP_int32 rate_dist_Q14_subfr, rate_dist_Q14, min_rate_dist_Q14;
+
+TIC(quant_LTP)
+
+ /***************************************************/
+ /* iterate over different codebooks with different */
+ /* rates/distortions, and choose best */
+ /***************************************************/
+ min_rate_dist_Q14 = SKP_int32_MAX;
+ for( k = 0; k < 3; k++ ) {
+ cl_ptr_Q5 = SKP_Silk_LTP_gain_BITS_Q5_ptrs[ k ];
+ cbk_ptr_Q7 = SKP_Silk_LTP_vq_ptrs_Q7[ k ];
+ cbk_size = SKP_Silk_LTP_vq_sizes[ k ];
+
+ /* Setup pointer to first subframe */
+ W_Q18_ptr = W_Q18;
+ b_Q14_ptr = B_Q14;
+
+ rate_dist_Q14 = 0;
+ for( j = 0; j < nb_subfr; j++ ) {
+
+ SKP_Silk_VQ_WMat_EC(
+ &temp_idx[ j ], /* O index of best codebook vector */
+ &rate_dist_Q14_subfr, /* O best weighted quantization error + mu * rate */
+ b_Q14_ptr, /* I input vector to be quantized */
+ W_Q18_ptr, /* I weighting matrix */
+ cbk_ptr_Q7, /* I codebook */
+ cl_ptr_Q5, /* I code length for each codebook vector */
+ mu_Q9, /* I tradeoff between weighted error and rate */
+ cbk_size /* I number of vectors in codebook */
+ );
+
+ rate_dist_Q14 = SKP_ADD_POS_SAT32( rate_dist_Q14, rate_dist_Q14_subfr );
+
+ b_Q14_ptr += LTP_ORDER;
+ W_Q18_ptr += LTP_ORDER * LTP_ORDER;
+ }
+
+ /* Avoid never finding a codebook */
+ rate_dist_Q14 = SKP_min( SKP_int32_MAX - 1, rate_dist_Q14 );
+
+ if( rate_dist_Q14 < min_rate_dist_Q14 ) {
+ min_rate_dist_Q14 = rate_dist_Q14;
+ *periodicity_index = (SKP_int8)k;
+ SKP_memcpy( cbk_index, temp_idx, nb_subfr * sizeof( SKP_int8 ) );
+ }
+
+ /* Break early in low-complexity mode if rate distortion is below threshold */
+ if( lowComplexity && ( rate_dist_Q14 < SKP_Silk_LTP_gain_middle_avg_RD_Q14 ) ) {
+ break;
+ }
+ }
+
+ cbk_ptr_Q7 = SKP_Silk_LTP_vq_ptrs_Q7[ *periodicity_index ];
+ for( j = 0; j < nb_subfr; j++ ) {
+ for( k = 0; k < LTP_ORDER; k++ ) {
+ B_Q14[ j * LTP_ORDER + k ] = SKP_LSHIFT( cbk_ptr_Q7[ cbk_index[ j ] * LTP_ORDER + k ], 7 );
+ }
+ }
+TOC(quant_LTP)
+}
+
--- /dev/null
+++ b/src_common/SKP_Silk_shell_coder.c
@@ -1,0 +1,147 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/* shell coder; pulse-subframe length is hardcoded */
+
+SKP_INLINE void combine_pulses(
+ SKP_int *out, /* O: combined pulses vector [len] */
+ const SKP_int *in, /* I: input vector [2 * len] */
+ const SKP_int len /* I: number of OUTPUT samples */
+)
+{
+ SKP_int k;
+ for( k = 0; k < len; k++ ) {
+ out[ k ] = in[ 2 * k ] + in[ 2 * k + 1 ];
+ }
+}
+
+SKP_INLINE void encode_split(
+ ec_enc *psRangeEnc, /* I/O compressor data structure */
+ const SKP_int p_child1, /* I: pulse amplitude of first child subframe */
+ const SKP_int p, /* I: pulse amplitude of current subframe */
+ const SKP_uint8 *shell_table /* I: table of shell cdfs */
+)
+{
+ if( p > 0 ) {
+ ec_enc_icdf( psRangeEnc, p_child1, &shell_table[ SKP_Silk_shell_code_table_offsets[ p ] ], 8 );
+ }
+}
+
+SKP_INLINE void decode_split(
+ SKP_int *p_child1, /* O: pulse amplitude of first child subframe */
+ SKP_int *p_child2, /* O: pulse amplitude of second child subframe */
+ ec_dec *psRangeDec, /* I/O Compressor data structure */
+ const SKP_int p, /* I: pulse amplitude of current subframe */
+ const SKP_uint8 *shell_table /* I: table of shell cdfs */
+)
+{
+ if( p > 0 ) {
+ p_child1[ 0 ] = ec_dec_icdf( psRangeDec, &shell_table[ SKP_Silk_shell_code_table_offsets[ p ] ], 8 );
+ p_child2[ 0 ] = p - p_child1[ 0 ];
+ } else {
+ p_child1[ 0 ] = 0;
+ p_child2[ 0 ] = 0;
+ }
+}
+
+/* Shell encoder, operates on one shell code frame of 16 pulses */
+void SKP_Silk_shell_encoder(
+ ec_enc *psRangeEnc, /* I/O compressor data structure */
+ const SKP_int *pulses0 /* I data: nonnegative pulse amplitudes */
+)
+{
+ SKP_int pulses1[ 8 ], pulses2[ 4 ], pulses3[ 2 ], pulses4[ 1 ];
+
+ /* this function operates on one shell code frame of 16 pulses */
+ SKP_assert( SHELL_CODEC_FRAME_LENGTH == 16 );
+
+ /* tree representation per pulse-subframe */
+ combine_pulses( pulses1, pulses0, 8 );
+ combine_pulses( pulses2, pulses1, 4 );
+ combine_pulses( pulses3, pulses2, 2 );
+ combine_pulses( pulses4, pulses3, 1 );
+
+ encode_split( psRangeEnc, pulses3[ 0 ], pulses4[ 0 ], SKP_Silk_shell_code_table3 );
+
+ encode_split( psRangeEnc, pulses2[ 0 ], pulses3[ 0 ], SKP_Silk_shell_code_table2 );
+
+ encode_split( psRangeEnc, pulses1[ 0 ], pulses2[ 0 ], SKP_Silk_shell_code_table1 );
+ encode_split( psRangeEnc, pulses0[ 0 ], pulses1[ 0 ], SKP_Silk_shell_code_table0 );
+ encode_split( psRangeEnc, pulses0[ 2 ], pulses1[ 1 ], SKP_Silk_shell_code_table0 );
+
+ encode_split( psRangeEnc, pulses1[ 2 ], pulses2[ 1 ], SKP_Silk_shell_code_table1 );
+ encode_split( psRangeEnc, pulses0[ 4 ], pulses1[ 2 ], SKP_Silk_shell_code_table0 );
+ encode_split( psRangeEnc, pulses0[ 6 ], pulses1[ 3 ], SKP_Silk_shell_code_table0 );
+
+ encode_split( psRangeEnc, pulses2[ 2 ], pulses3[ 1 ], SKP_Silk_shell_code_table2 );
+
+ encode_split( psRangeEnc, pulses1[ 4 ], pulses2[ 2 ], SKP_Silk_shell_code_table1 );
+ encode_split( psRangeEnc, pulses0[ 8 ], pulses1[ 4 ], SKP_Silk_shell_code_table0 );
+ encode_split( psRangeEnc, pulses0[ 10 ], pulses1[ 5 ], SKP_Silk_shell_code_table0 );
+
+ encode_split( psRangeEnc, pulses1[ 6 ], pulses2[ 3 ], SKP_Silk_shell_code_table1 );
+ encode_split( psRangeEnc, pulses0[ 12 ], pulses1[ 6 ], SKP_Silk_shell_code_table0 );
+ encode_split( psRangeEnc, pulses0[ 14 ], pulses1[ 7 ], SKP_Silk_shell_code_table0 );
+}
+
+
+/* Shell decoder, operates on one shell code frame of 16 pulses */
+void SKP_Silk_shell_decoder(
+ SKP_int *pulses0, /* O data: nonnegative pulse amplitudes */
+ ec_dec *psRangeDec, /* I/O Compressor data structure */
+ const SKP_int pulses4 /* I number of pulses per pulse-subframe */
+)
+{
+ SKP_int pulses3[ 2 ], pulses2[ 4 ], pulses1[ 8 ];
+
+ /* this function operates on one shell code frame of 16 pulses */
+ SKP_assert( SHELL_CODEC_FRAME_LENGTH == 16 );
+
+ decode_split( &pulses3[ 0 ], &pulses3[ 1 ], psRangeDec, pulses4, SKP_Silk_shell_code_table3 );
+
+ decode_split( &pulses2[ 0 ], &pulses2[ 1 ], psRangeDec, pulses3[ 0 ], SKP_Silk_shell_code_table2 );
+
+ decode_split( &pulses1[ 0 ], &pulses1[ 1 ], psRangeDec, pulses2[ 0 ], SKP_Silk_shell_code_table1 );
+ decode_split( &pulses0[ 0 ], &pulses0[ 1 ], psRangeDec, pulses1[ 0 ], SKP_Silk_shell_code_table0 );
+ decode_split( &pulses0[ 2 ], &pulses0[ 3 ], psRangeDec, pulses1[ 1 ], SKP_Silk_shell_code_table0 );
+
+ decode_split( &pulses1[ 2 ], &pulses1[ 3 ], psRangeDec, pulses2[ 1 ], SKP_Silk_shell_code_table1 );
+ decode_split( &pulses0[ 4 ], &pulses0[ 5 ], psRangeDec, pulses1[ 2 ], SKP_Silk_shell_code_table0 );
+ decode_split( &pulses0[ 6 ], &pulses0[ 7 ], psRangeDec, pulses1[ 3 ], SKP_Silk_shell_code_table0 );
+
+ decode_split( &pulses2[ 2 ], &pulses2[ 3 ], psRangeDec, pulses3[ 1 ], SKP_Silk_shell_code_table2 );
+
+ decode_split( &pulses1[ 4 ], &pulses1[ 5 ], psRangeDec, pulses2[ 2 ], SKP_Silk_shell_code_table1 );
+ decode_split( &pulses0[ 8 ], &pulses0[ 9 ], psRangeDec, pulses1[ 4 ], SKP_Silk_shell_code_table0 );
+ decode_split( &pulses0[ 10 ], &pulses0[ 11 ], psRangeDec, pulses1[ 5 ], SKP_Silk_shell_code_table0 );
+
+ decode_split( &pulses1[ 6 ], &pulses1[ 7 ], psRangeDec, pulses2[ 3 ], SKP_Silk_shell_code_table1 );
+ decode_split( &pulses0[ 12 ], &pulses0[ 13 ], psRangeDec, pulses1[ 6 ], SKP_Silk_shell_code_table0 );
+ decode_split( &pulses0[ 14 ], &pulses0[ 15 ], psRangeDec, pulses1[ 7 ], SKP_Silk_shell_code_table0 );
+}
--- /dev/null
+++ b/src_common/SKP_Silk_stereo_LR_to_MS.c
@@ -1,0 +1,94 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/* Convert Left/Right stereo signal to adaptive Mid/Side representation */
+void SKP_Silk_stereo_LR_to_MS(
+ stereo_state *state, /* I/O State */
+ SKP_int16 x1[], /* I/O Left input signal, becomes mid signal */
+ SKP_int16 x2[], /* I/O Right input signal, becomes side signal */
+ SKP_int *predictorIx, /* O Index for predictor filter */
+ SKP_int fs_kHz, /* I Samples rate (kHz) */
+ SKP_int frame_length /* I Number of samples */
+)
+{
+ SKP_int n, scale, scale1, scale2;
+ SKP_int32 sum, diff, nrg1, nrg2, corr, predictor_Q16, pred_Q16, delta_Q16;
+
+ /* Convert to basic mid/side signals */
+ for( n = 0; n < frame_length; n++ ) {
+ sum = x1[ n ] + (SKP_int32)x2[ n ];
+ diff = x1[ n ] - (SKP_int32)x2[ n ];
+ x1[ n ] = (SKP_int16)SKP_RSHIFT32( sum + 1, 1 );
+ x2[ n ] = (SKP_int16)SKP_RSHIFT32( diff, 1 );
+ }
+
+ /* Find predictor */
+ SKP_Silk_sum_sqr_shift( &nrg1, &scale1, x1, frame_length );
+ SKP_Silk_sum_sqr_shift( &nrg2, &scale2, x2, frame_length );
+ if( scale1 > scale2 ) {
+ scale = scale1;
+ } else {
+ scale = scale2;
+ nrg1 = SKP_RSHIFT32( nrg1, scale2 - scale1 );
+ }
+ corr = SKP_Silk_inner_prod_aligned_scale( x1, x2, scale, frame_length );
+ predictor_Q16 = SKP_DIV32_varQ( corr, nrg1 + 1, 16 );
+
+ /* Hysteresis */
+ if( predictor_Q16 > state->predictor_prev_Q16 ) {
+ predictor_Q16 -= SKP_FIX_CONST( STEREO_QUANT_HYSTERESIS / STEREO_QUANT_STEPS, 16 );
+ } else {
+ predictor_Q16 += SKP_FIX_CONST( STEREO_QUANT_HYSTERESIS / STEREO_QUANT_STEPS, 16 );
+ }
+
+ /* Quantize */
+ *predictorIx = SKP_RSHIFT_ROUND( SKP_MUL( predictor_Q16 + 65536, STEREO_QUANT_STEPS - 1 ), 17 );
+ *predictorIx = SKP_LIMIT( *predictorIx, 0, STEREO_QUANT_STEPS - 1 );
+
+ predictor_Q16 = SKP_SMLABB( -65536, *predictorIx, ( 1 << 17 ) / ( STEREO_QUANT_STEPS - 1 ) );
+
+ /* Subtract prediction from side channel */
+ if( predictor_Q16 != state->predictor_prev_Q16 ) {
+ /* Interpolate predictor */
+ pred_Q16 = -state->predictor_prev_Q16;
+ delta_Q16 = -SKP_DIV32_16( predictor_Q16 - state->predictor_prev_Q16, STEREO_INTERPOL_LENGTH_MS * fs_kHz );
+ for( n = 0; n < STEREO_INTERPOL_LENGTH_MS * fs_kHz; n++ ) {
+ pred_Q16 += delta_Q16;
+ x2[ n ] = (SKP_int16)SKP_SAT16( SKP_SMLAWB( x2[ n ], pred_Q16, x1[ n ] ) );
+ }
+ } else {
+ n = 0;
+ }
+ pred_Q16 = -predictor_Q16;
+ for( ; n < frame_length; n++ ) {
+ x2[ n ] = (SKP_int16)SKP_SAT16( SKP_SMLAWB( x2[ n ], pred_Q16, x1[ n ] ) );
+ }
+
+ state->predictor_prev_Q16 = predictor_Q16;
+}
--- /dev/null
+++ b/src_common/SKP_Silk_stereo_MS_to_LR.c
@@ -1,0 +1,72 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_main.h"
+
+/* Convert adaptive Mid/Side representation to Left/Right stereo signal */
+void SKP_Silk_stereo_MS_to_LR(
+ stereo_state *state, /* I/O State */
+ SKP_int16 x1[], /* I/O Left input signal, becomes mid signal */
+ SKP_int16 x2[], /* I/O Right input signal, becomes side signal */
+ SKP_int predictorIx, /* I Index for predictor filter */
+ SKP_int fs_kHz, /* I Samples rate (kHz) */
+ SKP_int frame_length /* I Number of samples */
+)
+{
+ SKP_int n;
+ SKP_int32 sum, diff, predictor_Q16, pred_Q16, delta_Q16;
+
+ /* Dequantize */
+ predictor_Q16 = SKP_SMLABB( -65536, predictorIx, ( 1 << 17 ) / ( STEREO_QUANT_STEPS - 1 ) );
+
+ /* Add prediction to side channel */
+ if( predictor_Q16 != state->predictor_prev_Q16 ) {
+ /* Interpolate predictor */
+ pred_Q16 = state->predictor_prev_Q16;
+ delta_Q16 = SKP_DIV32_16( predictor_Q16 - state->predictor_prev_Q16, STEREO_INTERPOL_LENGTH_MS * fs_kHz );
+ for( n = 0; n < STEREO_INTERPOL_LENGTH_MS * fs_kHz; n++ ) {
+ pred_Q16 += delta_Q16;
+ x2[ n ] = (SKP_int16)SKP_SAT16( SKP_SMLAWB( x2[ n ], pred_Q16, x1[ n ] ) );
+ }
+ } else {
+ n = 0;
+ }
+ pred_Q16 = predictor_Q16;
+ for( ; n < frame_length; n++ ) {
+ x2[ n ] = (SKP_int16)SKP_SAT16( SKP_SMLAWB( x2[ n ], pred_Q16, x1[ n ] ) );
+ }
+
+ state->predictor_prev_Q16 = predictor_Q16;
+
+ /* Convert to left/right signals */
+ for( n = 0; n < frame_length; n++ ) {
+ sum = x1[ n ] + (SKP_int32)x2[ n ];
+ diff = x1[ n ] - (SKP_int32)x2[ n ];
+ x1[ n ] = (SKP_int16)SKP_SAT16( sum );
+ x2[ n ] = (SKP_int16)SKP_SAT16( diff );
+ }
+}
--- /dev/null
+++ b/src_common/SKP_Silk_structs.h
@@ -1,0 +1,308 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef SKP_SILK_STRUCTS_H
+#define SKP_SILK_STRUCTS_H
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "SKP_Silk_typedef.h"
+#include "SKP_Silk_SigProc_FIX.h"
+#include "SKP_Silk_define.h"
+#include "entenc.h"
+#include "entdec.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/************************************/
+/* Noise shaping quantization state */
+/************************************/
+typedef struct {
+ SKP_int16 xq[ 2 * MAX_FRAME_LENGTH ]; /* Buffer for quantized output signal */
+ SKP_int32 sLTP_shp_Q10[ 2 * MAX_FRAME_LENGTH ];
+ SKP_int32 sLPC_Q14[ MAX_SUB_FRAME_LENGTH + NSQ_LPC_BUF_LENGTH ];
+ SKP_int32 sAR2_Q14[ MAX_SHAPE_LPC_ORDER ];
+ SKP_int32 sLF_AR_shp_Q12;
+ SKP_int lagPrev;
+ SKP_int sLTP_buf_idx;
+ SKP_int sLTP_shp_buf_idx;
+ SKP_int32 rand_seed;
+ SKP_int32 prev_inv_gain_Q16;
+ SKP_int rewhite_flag;
+} SKP_Silk_nsq_state;
+
+/********************************/
+/* VAD state */
+/********************************/
+typedef struct {
+ SKP_int32 AnaState[ 2 ]; /* Analysis filterbank state: 0-8 kHz */
+ SKP_int32 AnaState1[ 2 ]; /* Analysis filterbank state: 0-4 kHz */
+ SKP_int32 AnaState2[ 2 ]; /* Analysis filterbank state: 0-2 kHz */
+ SKP_int32 XnrgSubfr[ VAD_N_BANDS ]; /* Subframe energies */
+ SKP_int32 NrgRatioSmth_Q8[ VAD_N_BANDS ]; /* Smoothed energy level in each band */
+ SKP_int16 HPstate; /* State of differentiator in the lowest band */
+ SKP_int32 NL[ VAD_N_BANDS ]; /* Noise energy level in each band */
+ SKP_int32 inv_NL[ VAD_N_BANDS ]; /* Inverse noise energy level in each band */
+ SKP_int32 NoiseLevelBias[ VAD_N_BANDS ]; /* Noise level estimator bias/offset */
+ SKP_int32 counter; /* Frame counter used in the initial phase */
+} SKP_Silk_VAD_state;
+
+/* Variable cut-off low-pass filter state */
+typedef struct {
+ SKP_int32 In_LP_State[ 2 ]; /* Low pass filter state */
+ SKP_int32 transition_frame_no; /* Counter which is mapped to a cut-off frequency */
+ SKP_int mode; /* Operating mode, <0: switch down, >0: switch up; 0: do nothing */
+} SKP_Silk_LP_state;
+
+/* Structure containing NLSF codebook */
+typedef struct {
+ const SKP_int16 nVectors;
+ const SKP_int16 order;
+ const SKP_int16 quantStepSize_Q16;
+ const SKP_int16 invQuantStepSize_Q6;
+ const SKP_uint8 *CB1_NLSF_Q8;
+ const SKP_uint8 *CB1_iCDF;
+ const SKP_uint8 *pred_Q8;
+ const SKP_uint8 *ec_sel;
+ const SKP_uint8 *ec_iCDF;
+ const SKP_uint8 *ec_Rates_Q5;
+ const SKP_int16 *deltaMin_Q15;
+} SKP_Silk_NLSF_CB_struct;
+
+typedef struct {
+ SKP_int32 predictor_prev_Q16;
+} stereo_state;
+
+typedef struct {
+ SKP_int8 GainsIndices[ MAX_NB_SUBFR ];
+ SKP_int8 LTPIndex[ MAX_NB_SUBFR ];
+ SKP_int8 NLSFIndices[ MAX_LPC_ORDER + 1 ];
+ SKP_int16 lagIndex;
+ SKP_int8 contourIndex;
+ SKP_int8 signalType;
+ SKP_int8 quantOffsetType;
+ SKP_int8 NLSFInterpCoef_Q2;
+ SKP_int8 PERIndex;
+ SKP_int8 LTP_scaleIndex;
+ SKP_int8 Seed;
+} SideInfoIndices;
+
+/********************************/
+/* Encoder state */
+/********************************/
+typedef struct {
+ SKP_int32 In_HP_State[ 2 ]; /* High pass filter state */
+ SKP_int32 variable_HP_smth1_Q15; /* State of first smoother */
+ SKP_int32 variable_HP_smth2_Q15; /* State of second smoother */
+ SKP_Silk_LP_state sLP; /* Low pass filter state */
+ SKP_Silk_VAD_state sVAD; /* Voice activity detector state */
+ SKP_Silk_nsq_state sNSQ; /* Noise Shape Quantizer State */
+ SKP_int16 prev_NLSFq_Q15[ MAX_LPC_ORDER ];/* Previously quantized NLSF vector */
+ SKP_int speech_activity_Q8; /* Speech activity */
+ SKP_int allow_bandwidth_switch; /* Flag indicating that switching of internal bandwidth is allowed */
+ SKP_int8 LBRRprevLastGainIndex;
+ SKP_int8 prevSignalType;
+ SKP_int prevLag;
+ SKP_int pitch_LPC_win_length;
+ SKP_int max_pitch_lag; /* Highest possible pitch lag (samples) */
+ SKP_int32 API_fs_Hz; /* API sampling frequency (Hz) */
+ SKP_int32 prev_API_fs_Hz; /* Previous API sampling frequency (Hz) */
+ SKP_int maxInternal_fs_Hz; /* Maximum internal sampling frequency (Hz) */
+ SKP_int minInternal_fs_Hz; /* Minimum internal sampling frequency (Hz) */
+ SKP_int desiredInternal_fs_Hz; /* Soft request for internal sampling frequency (Hz) */
+ SKP_int fs_kHz; /* Internal sampling frequency (kHz) */
+ SKP_int nb_subfr; /* Number of 5 ms subframes in a frame */
+ SKP_int frame_length; /* Frame length (samples) */
+ SKP_int subfr_length; /* Subframe length (samples) */
+ SKP_int ltp_mem_length; /* Length of LTP memory */
+ SKP_int la_pitch; /* Look-ahead for pitch analysis (samples) */
+ SKP_int la_shape; /* Look-ahead for noise shape analysis (samples) */
+ SKP_int shapeWinLength; /* Window length for noise shape analysis (samples) */
+ SKP_int32 TargetRate_bps; /* Target bitrate (bps) */
+ SKP_int PacketSize_ms; /* Number of milliseconds to put in each packet */
+ SKP_int PacketLoss_perc; /* Packet loss rate measured by farend */
+ SKP_int32 frameCounter;
+ SKP_int Complexity; /* Complexity setting: 0-> low; 1-> medium; 2->high */
+ SKP_int nStatesDelayedDecision; /* Number of states in delayed decision quantization */
+ SKP_int useInterpolatedNLSFs; /* Flag for using NLSF interpolation */
+ SKP_int shapingLPCOrder; /* Filter order for noise shaping filters */
+ SKP_int predictLPCOrder; /* Filter order for prediction filters */
+ SKP_int pitchEstimationComplexity; /* Complexity level for pitch estimator */
+ SKP_int pitchEstimationLPCOrder; /* Whitening filter order for pitch estimator */
+ SKP_int32 pitchEstimationThreshold_Q16; /* Threshold for pitch estimator */
+ SKP_int LTPQuantLowComplexity; /* Flag for low complexity LTP quantization */
+ SKP_int mu_LTP_Q9; /* Rate-distortion tradeoff in LTP quantization */
+ SKP_int NLSF_MSVQ_Survivors; /* Number of survivors in NLSF MSVQ */
+ SKP_int first_frame_after_reset; /* Flag for deactivating NLSF interp. and fluc. reduction after resets */
+ SKP_int controlled_since_last_payload; /* Flag for ensuring codec_control only runs once per packet */
+ SKP_int warping_Q16; /* Warping parameter for warped noise shaping */
+ SKP_int useCBR; /* Flag to enable constant bitrate */
+ SKP_int prefillFlag; /* Flag to indicate that only buffers are prefilled, no coding */
+ const SKP_uint8 *pitch_lag_low_bits_iCDF; /* Pointer to iCDF table for low bits of pitch lag index */
+ const SKP_uint8 *pitch_contour_iCDF; /* Pointer to iCDF table for pitch contour index */
+ const SKP_Silk_NLSF_CB_struct *psNLSF_CB; /* Pointer to NLSF codebook */
+ SKP_int input_quality_bands_Q15[ VAD_N_BANDS ];
+ SKP_int input_tilt_Q15;
+ SKP_int SNR_dB_Q7; /* Quality setting */
+
+ SKP_int8 VAD_flags[ MAX_FRAMES_PER_PACKET ];
+ SKP_int8 LBRR_flag;
+ SKP_int LBRR_flags[ MAX_FRAMES_PER_PACKET ];
+
+ SideInfoIndices indices;
+ SKP_int8 pulses[ MAX_FRAME_LENGTH ];
+
+ /* Input/output buffering */
+ SKP_int16 inputBuf[ MAX_FRAME_LENGTH ]; /* buffer containing input signal */
+ SKP_int inputBufIx;
+ SKP_int nFramesPerPacket;
+ SKP_int nFramesAnalyzed; /* Number of frames analyzed in current packet */
+
+ /* Parameters For LTP scaling Control */
+ SKP_int frames_since_onset;
+
+ /* Specifically for entropy coding */
+ SKP_int ec_prevSignalType;
+ SKP_int16 ec_prevLagIndex;
+
+ SKP_Silk_resampler_state_struct resampler_state;
+
+ /* DTX */
+ SKP_int useDTX; /* Flag to enable DTX */
+ SKP_int inDTX; /* Flag to signal DTX period */
+ SKP_int noSpeechCounter; /* Counts concecutive nonactive frames, used by DTX */
+
+ /* Inband Low Bitrate Redundancy (LBRR) data */
+ SKP_int useInBandFEC; /* Saves the API setting for query */
+ SKP_int LBRR_enabled; /* Depends on useInBandFRC, bitrate and packet loss rate */
+ SKP_int LBRR_GainIncreases; /* Number of shifts to Gains to get LBRR rate Voiced frames */
+ SideInfoIndices indices_LBRR[ MAX_FRAMES_PER_PACKET ];
+ SKP_int8 pulses_LBRR[ MAX_FRAMES_PER_PACKET ][ MAX_FRAME_LENGTH ];
+} SKP_Silk_encoder_state;
+
+
+/* Struct for Packet Loss Concealment */
+typedef struct {
+ SKP_int32 pitchL_Q8; /* Pitch lag to use for voiced concealment */
+ SKP_int16 LTPCoef_Q14[ LTP_ORDER ]; /* LTP coeficients to use for voiced concealment */
+ SKP_int16 prevLPC_Q12[ MAX_LPC_ORDER ];
+ SKP_int last_frame_lost; /* Was previous frame lost */
+ SKP_int32 rand_seed; /* Seed for unvoiced signal generation */
+ SKP_int16 randScale_Q14; /* Scaling of unvoiced random signal */
+ SKP_int32 conc_energy;
+ SKP_int conc_energy_shift;
+ SKP_int16 prevLTP_scale_Q14;
+ SKP_int32 prevGain_Q16[ MAX_NB_SUBFR ];
+ SKP_int fs_kHz;
+} SKP_Silk_PLC_struct;
+
+/* Struct for CNG */
+typedef struct {
+ SKP_int32 CNG_exc_buf_Q10[ MAX_FRAME_LENGTH ];
+ SKP_int16 CNG_smth_NLSF_Q15[ MAX_LPC_ORDER ];
+ SKP_int32 CNG_synth_state[ MAX_LPC_ORDER ];
+ SKP_int32 CNG_smth_Gain_Q16;
+ SKP_int32 rand_seed;
+ SKP_int fs_kHz;
+} SKP_Silk_CNG_struct;
+
+/********************************/
+/* Decoder state */
+/********************************/
+typedef struct {
+ SKP_int32 prev_inv_gain_Q16;
+ SKP_int32 sLTP_Q16[ 2 * MAX_FRAME_LENGTH ];
+ SKP_int32 sLPC_Q14[ MAX_SUB_FRAME_LENGTH + MAX_LPC_ORDER ];
+ SKP_int32 exc_Q10[ MAX_FRAME_LENGTH ];
+ SKP_int16 outBuf[ 2 * MAX_FRAME_LENGTH ]; /* Buffer for output signal */
+ SKP_int lagPrev; /* Previous Lag */
+ SKP_int8 LastGainIndex; /* Previous gain index */
+ SKP_int fs_kHz; /* Sampling frequency in kHz */
+ SKP_int32 prev_API_sampleRate; /* Previous API sample frequency (Hz) */
+ SKP_int nb_subfr; /* Number of 5 ms subframes in a frame */
+ SKP_int frame_length; /* Frame length (samples) */
+ SKP_int subfr_length; /* Subframe length (samples) */
+ SKP_int ltp_mem_length; /* Length of LTP memory */
+ SKP_int LPC_order; /* LPC order */
+ SKP_int16 prevNLSF_Q15[ MAX_LPC_ORDER ]; /* Used to interpolate LSFs */
+ SKP_int first_frame_after_reset; /* Flag for deactivating NLSF interp. and fluc. reduction after resets */
+ const SKP_uint8 *pitch_lag_low_bits_iCDF; /* Pointer to iCDF table for low bits of pitch lag index */
+ const SKP_uint8 *pitch_contour_iCDF; /* Pointer to iCDF table for pitch contour index */
+
+ /* For buffering payload in case of more frames per packet */
+ SKP_int nFramesDecoded;
+ SKP_int nFramesPerPacket;
+
+ /* Specifically for entropy coding */
+ SKP_int ec_prevSignalType;
+ SKP_int16 ec_prevLagIndex;
+
+ SKP_int VAD_flags[ MAX_FRAMES_PER_PACKET ];
+ SKP_int LBRR_flag;
+ SKP_int LBRR_flags[ MAX_FRAMES_PER_PACKET ];
+
+ SKP_Silk_resampler_state_struct resampler_state;
+
+ const SKP_Silk_NLSF_CB_struct *psNLSF_CB; /* Pointer to NLSF codebook */
+
+ /* Quantization indices */
+ SideInfoIndices indices;
+
+ /* CNG state */
+ SKP_Silk_CNG_struct sCNG;
+
+ /* Stuff used for PLC */
+ SKP_int lossCnt;
+ SKP_int prevSignalType;
+
+ SKP_Silk_PLC_struct sPLC;
+
+} SKP_Silk_decoder_state;
+
+/************************/
+/* Decoder control */
+/************************/
+typedef struct {
+ /* prediction and coding parameters */
+ SKP_int pitchL[ MAX_NB_SUBFR ];
+ SKP_int32 Gains_Q16[ MAX_NB_SUBFR ];
+ /* holds interpolated and final coefficients, 4-byte aligned */
+ SKP_DWORD_ALIGN SKP_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ];
+ SKP_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ];
+ SKP_int LTP_scale_Q14;
+} SKP_Silk_decoder_control;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+++ b/src_common/SKP_Silk_tables.h
@@ -1,0 +1,114 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef SKP_SILK_TABLES_H
+#define SKP_SILK_TABLES_H
+
+#include "SKP_Silk_define.h"
+#include "SKP_Silk_structs.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/* entropy coding tables */
+extern const SKP_uint8 SKP_Silk_gain_iCDF[ 3 ][ N_LEVELS_QGAIN / 8 ]; /* 24 */
+extern const SKP_uint8 SKP_Silk_delta_gain_iCDF[ MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 ]; /* 41 */
+
+extern const SKP_uint8 SKP_Silk_pitch_lag_iCDF[ 2 * ( PITCH_EST_MAX_LAG_MS - PITCH_EST_MIN_LAG_MS ) ]; /* 32 */
+extern const SKP_uint8 SKP_Silk_pitch_delta_iCDF[ 21 ]; /* 21 */
+extern const SKP_uint8 SKP_Silk_pitch_contour_iCDF[ 34 ]; /* 34 */
+extern const SKP_uint8 SKP_Silk_pitch_contour_NB_iCDF[ 11 ]; /* 11 */
+extern const SKP_uint8 SKP_Silk_pitch_contour_10_ms_iCDF[ 12 ]; /* 12 */
+extern const SKP_uint8 SKP_Silk_pitch_contour_10_ms_NB_iCDF[ 3 ]; /* 3 */
+
+extern const SKP_uint8 SKP_Silk_pulses_per_block_iCDF[ N_RATE_LEVELS ][ MAX_PULSES + 2 ]; /* 180 */
+extern const SKP_uint8 SKP_Silk_pulses_per_block_BITS_Q5[ N_RATE_LEVELS - 1 ][ MAX_PULSES + 2 ]; /* 162 */
+
+extern const SKP_uint8 SKP_Silk_rate_levels_iCDF[ 2 ][ N_RATE_LEVELS - 1 ]; /* 18 */
+extern const SKP_uint8 SKP_Silk_rate_levels_BITS_Q5[ 2 ][ N_RATE_LEVELS - 1 ]; /* 18 */
+
+extern const SKP_uint8 SKP_Silk_max_pulses_table[ 4 ]; /* 4 */
+
+extern const SKP_uint8 SKP_Silk_shell_code_table0[ 44 ]; /* 44 */
+extern const SKP_uint8 SKP_Silk_shell_code_table1[ 65 ]; /* 65 */
+extern const SKP_uint8 SKP_Silk_shell_code_table2[ 90 ]; /* 90 */
+extern const SKP_uint8 SKP_Silk_shell_code_table3[ 152 ]; /* 152 */
+extern const SKP_uint8 SKP_Silk_shell_code_table_offsets[ MAX_PULSES + 1 ]; /* 17 */
+
+extern const SKP_uint8 SKP_Silk_lsb_iCDF[ 2 ]; /* 2 */
+
+extern const SKP_uint8 SKP_Silk_sign_iCDF[ 36 ]; /* 36 */
+
+extern const SKP_uint8 SKP_Silk_uniform2_iCDF[ 2 ]; /* 2 */
+extern const SKP_uint8 SKP_Silk_uniform4_iCDF[ 4 ]; /* 4 */
+extern const SKP_uint8 SKP_Silk_uniform6_iCDF[ 6 ]; /* 6 */
+extern const SKP_uint8 SKP_Silk_uniform8_iCDF[ 8 ]; /* 8 */
+
+extern const SKP_uint8 SKP_Silk_NLSF_EXT_iCDF[ 7 ]; /* 7 */
+
+extern const SKP_uint8 SKP_Silk_LTP_per_index_iCDF[ 3 ]; /* 3 */
+extern const SKP_uint8 * const SKP_Silk_LTP_gain_iCDF_ptrs[ NB_LTP_CBKS ]; /* 3 */
+extern const SKP_uint8 * const SKP_Silk_LTP_gain_BITS_Q5_ptrs[ NB_LTP_CBKS ]; /* 3 */
+extern const SKP_int16 SKP_Silk_LTP_gain_middle_avg_RD_Q14;
+extern const SKP_int8 * const SKP_Silk_LTP_vq_ptrs_Q7[ NB_LTP_CBKS ]; /* 168 */
+extern const SKP_int8 SKP_Silk_LTP_vq_sizes[ NB_LTP_CBKS ]; /* 3 */
+
+extern const SKP_uint8 SKP_Silk_LTPscale_iCDF[ 3 ]; /* 4 */
+extern const SKP_int16 SKP_Silk_LTPScales_table_Q14[ 3 ];
+
+extern const SKP_uint8 SKP_Silk_type_offset_VAD_iCDF[ 4 ]; /* 4 */
+extern const SKP_uint8 SKP_Silk_type_offset_no_VAD_iCDF[ 2 ]; /* 2 */
+
+extern const SKP_uint8 SKP_Silk_stereo_predictor_iCDF[ STEREO_QUANT_STEPS + 1 ];
+
+extern const SKP_uint8 * const SKP_Silk_LBRR_flags_iCDF_ptr[ 2 ]; /* 10 */
+
+extern const SKP_uint8 SKP_Silk_NLSF_interpolation_factor_iCDF[ 5 ]; /* 5 */
+
+extern const SKP_Silk_NLSF_CB_struct SKP_Silk_NLSF_CB_WB;
+extern const SKP_Silk_NLSF_CB_struct SKP_Silk_NLSF_CB_NB_MB;
+
+/* Piece-wise linear mapping from bitrate in kbps to coding quality in dB SNR */
+extern const SKP_int32 TargetRate_table_NB[ TARGET_RATE_TAB_SZ ];
+extern const SKP_int32 TargetRate_table_MB[ TARGET_RATE_TAB_SZ ];
+extern const SKP_int32 TargetRate_table_WB[ TARGET_RATE_TAB_SZ ];
+extern const SKP_int16 SNR_table_Q1[ TARGET_RATE_TAB_SZ ];
+
+/* Quantization offsets */
+extern const SKP_int16 SKP_Silk_Quantization_Offsets_Q10[ 2 ][ 2 ];
+
+/* Interpolation points for filter coefficients used in the bandwidth transition smoother */
+extern const SKP_int32 SKP_Silk_Transition_LP_B_Q28[ TRANSITION_INT_NUM ][ TRANSITION_NB ];
+extern const SKP_int32 SKP_Silk_Transition_LP_A_Q28[ TRANSITION_INT_NUM ][ TRANSITION_NA ];
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+++ b/src_common/SKP_Silk_tables_LTP.c
@@ -1,0 +1,268 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_tables.h"
+
+const SKP_uint8 SKP_Silk_LTP_per_index_iCDF[3] = {
+ 179, 99, 0
+};
+
+const SKP_uint8 SKP_Silk_LTP_gain_iCDF_0[8] = {
+ 71, 56, 43, 30, 21, 12, 6, 0
+};
+
+const SKP_uint8 SKP_Silk_LTP_gain_iCDF_1[16] = {
+ 199, 165, 144, 124, 109, 96, 84, 71,
+ 61, 51, 42, 32, 23, 15, 8, 0
+};
+
+const SKP_uint8 SKP_Silk_LTP_gain_iCDF_2[32] = {
+ 241, 225, 211, 199, 187, 175, 164, 153,
+ 142, 132, 123, 114, 105, 96, 88, 80,
+ 72, 64, 57, 50, 44, 38, 33, 29,
+ 24, 20, 16, 12, 9, 5, 2, 0
+};
+
+const SKP_int16 SKP_Silk_LTP_gain_middle_avg_RD_Q14 = 12304;
+
+const SKP_uint8 SKP_Silk_LTP_gain_BITS_Q5_0[8] = {
+ 15, 131, 138, 138, 155, 155, 173, 173
+};
+
+const SKP_uint8 SKP_Silk_LTP_gain_BITS_Q5_1[16] = {
+ 69, 93, 115, 118, 131, 138, 141, 138,
+ 150, 150, 155, 150, 155, 160, 166, 160
+};
+
+const SKP_uint8 SKP_Silk_LTP_gain_BITS_Q5_2[32] = {
+ 131, 128, 134, 141, 141, 141, 145, 145,
+ 145, 150, 155, 155, 155, 155, 160, 160,
+ 160, 160, 166, 166, 173, 173, 182, 192,
+ 182, 192, 192, 192, 205, 192, 205, 224
+};
+
+const SKP_uint8 * const SKP_Silk_LTP_gain_iCDF_ptrs[NB_LTP_CBKS] = {
+ SKP_Silk_LTP_gain_iCDF_0,
+ SKP_Silk_LTP_gain_iCDF_1,
+ SKP_Silk_LTP_gain_iCDF_2
+};
+
+const SKP_uint8 * const SKP_Silk_LTP_gain_BITS_Q5_ptrs[NB_LTP_CBKS] = {
+ SKP_Silk_LTP_gain_BITS_Q5_0,
+ SKP_Silk_LTP_gain_BITS_Q5_1,
+ SKP_Silk_LTP_gain_BITS_Q5_2
+};
+
+const SKP_int8 SKP_Silk_LTP_gain_vq_0[8][5] =
+{
+{
+ 4, 6, 24, 7, 5
+},
+{
+ 0, 0, 2, 0, 0
+},
+{
+ 12, 28, 41, 13, -4
+},
+{
+ -9, 15, 42, 25, 14
+},
+{
+ 1, -2, 62, 41, -9
+},
+{
+ -10, 37, 65, -4, 3
+},
+{
+ -6, 4, 66, 7, -8
+},
+{
+ 16, 14, 38, -3, 33
+}
+};
+
+const SKP_int8 SKP_Silk_LTP_gain_vq_1[16][5] =
+{
+{
+ 13, 22, 39, 23, 12
+},
+{
+ -1, 36, 64, 27, -6
+},
+{
+ -7, 10, 55, 43, 17
+},
+{
+ 1, 1, 8, 1, 1
+},
+{
+ 6, -11, 74, 53, -9
+},
+{
+ -12, 55, 76, -12, 8
+},
+{
+ -3, 3, 93, 27, -4
+},
+{
+ 26, 39, 59, 3, -8
+},
+{
+ 2, 0, 77, 11, 9
+},
+{
+ -8, 22, 44, -6, 7
+},
+{
+ 40, 9, 26, 3, 9
+},
+{
+ -7, 20, 101, -7, 4
+},
+{
+ 3, -8, 42, 26, 0
+},
+{
+ -15, 33, 68, 2, 23
+},
+{
+ -2, 55, 46, -2, 15
+},
+{
+ 3, -1, 21, 16, 41
+}
+};
+
+const SKP_int8 SKP_Silk_LTP_gain_vq_2[32][5] =
+{
+{
+ -6, 27, 61, 39, 5
+},
+{
+ -11, 42, 88, 4, 1
+},
+{
+ -2, 60, 65, 6, -4
+},
+{
+ -1, -5, 73, 56, 1
+},
+{
+ -9, 19, 94, 29, -9
+},
+{
+ 0, 12, 99, 6, 4
+},
+{
+ 8, -19, 102, 46, -13
+},
+{
+ 3, 2, 13, 3, 2
+},
+{
+ 9, -21, 84, 72, -18
+},
+{
+ -11, 46, 104, -22, 8
+},
+{
+ 18, 38, 48, 23, 0
+},
+{
+ -16, 70, 83, -21, 11
+},
+{
+ 5, -11, 117, 22, -8
+},
+{
+ -6, 23, 117, -12, 3
+},
+{
+ 3, -8, 95, 28, 4
+},
+{
+ -10, 15, 77, 60, -15
+},
+{
+ -1, 4, 124, 2, -4
+},
+{
+ 3, 38, 84, 24, -25
+},
+{
+ 2, 13, 42, 13, 31
+},
+{
+ 21, -4, 56, 46, -1
+},
+{
+ -1, 35, 79, -13, 19
+},
+{
+ -7, 65, 88, -9, -14
+},
+{
+ 20, 4, 81, 49, -29
+},
+{
+ 20, 0, 75, 3, -17
+},
+{
+ 5, -9, 44, 92, -8
+},
+{
+ 1, -3, 22, 69, 31
+},
+{
+ -6, 95, 41, -12, 5
+},
+{
+ 39, 67, 16, -4, 1
+},
+{
+ 0, -6, 120, 55, -36
+},
+{
+ -13, 44, 122, 4, -24
+},
+{
+ 81, 5, 11, 3, 7
+},
+{
+ 2, 0, 9, 10, 88
+}
+};
+
+const SKP_int8 * const SKP_Silk_LTP_vq_ptrs_Q7[NB_LTP_CBKS] = {
+ (SKP_int8 *)&SKP_Silk_LTP_gain_vq_0[0][0],
+ (SKP_int8 *)&SKP_Silk_LTP_gain_vq_1[0][0],
+ (SKP_int8 *)&SKP_Silk_LTP_gain_vq_2[0][0]
+};
+
+const SKP_int8 SKP_Silk_LTP_vq_sizes[NB_LTP_CBKS] = {
+ 8, 16, 32
+};
--- /dev/null
+++ b/src_common/SKP_Silk_tables_NLSF_CB_NB_MB.c
@@ -1,0 +1,155 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_structs.h"
+
+const SKP_uint8 SKP_Silk_NLSF_CB1_NB_MB_Q8[ 320 ] = {
+ 12, 35, 60, 83, 108, 132, 157, 180,
+ 206, 228, 15, 32, 55, 77, 101, 125,
+ 151, 175, 201, 225, 19, 42, 66, 89,
+ 114, 137, 162, 184, 209, 230, 12, 25,
+ 50, 72, 97, 120, 147, 172, 200, 223,
+ 26, 44, 69, 90, 114, 135, 159, 180,
+ 205, 225, 13, 22, 53, 80, 106, 130,
+ 156, 180, 205, 228, 15, 25, 44, 64,
+ 90, 115, 142, 168, 196, 222, 19, 24,
+ 62, 82, 100, 120, 145, 168, 190, 214,
+ 22, 31, 50, 79, 103, 120, 151, 170,
+ 203, 227, 21, 29, 45, 65, 106, 124,
+ 150, 171, 196, 224, 30, 49, 75, 97,
+ 121, 142, 165, 186, 209, 229, 19, 25,
+ 52, 70, 93, 116, 143, 166, 192, 219,
+ 26, 34, 62, 75, 97, 118, 145, 167,
+ 194, 217, 25, 33, 56, 70, 91, 113,
+ 143, 165, 196, 223, 21, 34, 51, 72,
+ 97, 117, 145, 171, 196, 222, 20, 29,
+ 50, 67, 90, 117, 144, 168, 197, 221,
+ 22, 31, 48, 66, 95, 117, 146, 168,
+ 196, 222, 24, 33, 51, 77, 116, 134,
+ 158, 180, 200, 224, 21, 28, 70, 87,
+ 106, 124, 149, 170, 194, 217, 26, 33,
+ 53, 64, 83, 117, 152, 173, 204, 225,
+ 27, 34, 65, 95, 108, 129, 155, 174,
+ 210, 225, 20, 26, 72, 99, 113, 131,
+ 154, 176, 200, 219, 34, 43, 61, 78,
+ 93, 114, 155, 177, 205, 229, 23, 29,
+ 54, 97, 124, 138, 163, 179, 209, 229,
+ 30, 38, 56, 89, 118, 129, 158, 178,
+ 200, 231, 21, 29, 49, 63, 85, 111,
+ 142, 163, 193, 222, 27, 48, 77, 103,
+ 133, 158, 179, 196, 215, 232, 29, 47,
+ 74, 99, 124, 151, 176, 198, 220, 237,
+ 33, 42, 61, 76, 93, 121, 155, 174,
+ 207, 225, 29, 53, 87, 112, 136, 154,
+ 170, 188, 208, 227, 24, 30, 52, 84,
+ 131, 150, 166, 186, 203, 229, 37, 48,
+ 64, 84, 104, 118, 156, 177, 201, 230
+};
+
+const SKP_uint8 SKP_Silk_NLSF_CB1_iCDF_NB_MB[ 64 ] = {
+ 212, 178, 148, 129, 108, 96, 85, 82,
+ 79, 77, 61, 59, 57, 56, 51, 49,
+ 48, 45, 42, 41, 40, 38, 36, 34,
+ 31, 30, 21, 12, 10, 3, 1, 0,
+ 255, 245, 244, 236, 233, 225, 217, 203,
+ 190, 176, 175, 161, 149, 136, 125, 114,
+ 102, 91, 81, 71, 60, 52, 43, 35,
+ 28, 20, 19, 18, 12, 11, 5, 0
+};
+
+const SKP_uint8 SKP_Silk_NLSF_CB2_SELECT_NB_MB[ 160 ] = {
+ 16, 0, 0, 0, 0, 99, 66, 36,
+ 36, 34, 36, 34, 34, 34, 34, 83,
+ 69, 36, 52, 34, 116, 102, 70, 68,
+ 68, 176, 102, 68, 68, 34, 65, 85,
+ 68, 84, 36, 116, 141, 152, 139, 170,
+ 132, 187, 184, 216, 137, 132, 249, 168,
+ 185, 139, 104, 102, 100, 68, 68, 178,
+ 218, 185, 185, 170, 244, 216, 187, 187,
+ 170, 244, 187, 187, 219, 138, 103, 155,
+ 184, 185, 137, 116, 183, 155, 152, 136,
+ 132, 217, 184, 184, 170, 164, 217, 171,
+ 155, 139, 244, 169, 184, 185, 170, 164,
+ 216, 223, 218, 138, 214, 143, 188, 218,
+ 168, 244, 141, 136, 155, 170, 168, 138,
+ 220, 219, 139, 164, 219, 202, 216, 137,
+ 168, 186, 246, 185, 139, 116, 185, 219,
+ 185, 138, 100, 100, 134, 100, 102, 34,
+ 68, 68, 100, 68, 168, 203, 221, 218,
+ 168, 167, 154, 136, 104, 70, 164, 246,
+ 171, 137, 139, 137, 155, 218, 219, 139
+};
+
+const SKP_uint8 SKP_Silk_NLSF_CB2_iCDF_NB_MB[ 72 ] = {
+ 255, 254, 253, 238, 14, 3, 2, 1,
+ 0, 255, 254, 252, 218, 35, 3, 2,
+ 1, 0, 255, 254, 250, 208, 59, 4,
+ 2, 1, 0, 255, 254, 246, 194, 71,
+ 10, 2, 1, 0, 255, 252, 236, 183,
+ 82, 8, 2, 1, 0, 255, 252, 235,
+ 180, 90, 17, 2, 1, 0, 255, 248,
+ 224, 171, 97, 30, 4, 1, 0, 255,
+ 254, 236, 173, 95, 37, 7, 1, 0
+};
+
+const SKP_uint8 SKP_Silk_NLSF_CB2_BITS_NB_MB_Q5[ 72 ] = {
+ 255, 255, 255, 131, 6, 145, 255, 255,
+ 255, 255, 255, 236, 93, 15, 96, 255,
+ 255, 255, 255, 255, 194, 83, 25, 71,
+ 221, 255, 255, 255, 255, 162, 73, 34,
+ 66, 162, 255, 255, 255, 210, 126, 73,
+ 43, 57, 173, 255, 255, 255, 201, 125,
+ 71, 48, 58, 130, 255, 255, 255, 166,
+ 110, 73, 57, 62, 104, 210, 255, 255,
+ 251, 123, 65, 55, 68, 100, 171, 255
+};
+
+const SKP_uint8 SKP_Silk_NLSF_PRED_NB_MB_Q8[ 18 ] = {
+ 179, 138, 140, 148, 151, 149, 153, 151,
+ 163, 116, 67, 82, 59, 92, 72, 100,
+ 89, 92
+};
+
+const SKP_int16 SKP_Silk_NLSF_DELTA_MIN_NB_MB_Q15[ 11 ] = {
+ 322, 3, 6, 3, 3, 3, 4, 3,
+ 3, 3, 461
+};
+
+const SKP_Silk_NLSF_CB_struct SKP_Silk_NLSF_CB_NB_MB =
+{
+ 32,
+ 10,
+ SKP_FIX_CONST( 0.18, 16 ),
+ SKP_FIX_CONST( 1.0 / 0.18, 6 ),
+ SKP_Silk_NLSF_CB1_NB_MB_Q8,
+ SKP_Silk_NLSF_CB1_iCDF_NB_MB,
+ SKP_Silk_NLSF_PRED_NB_MB_Q8,
+ SKP_Silk_NLSF_CB2_SELECT_NB_MB,
+ SKP_Silk_NLSF_CB2_iCDF_NB_MB,
+ SKP_Silk_NLSF_CB2_BITS_NB_MB_Q5,
+ SKP_Silk_NLSF_DELTA_MIN_NB_MB_Q15,
+};
--- /dev/null
+++ b/src_common/SKP_Silk_tables_NLSF_CB_WB.c
@@ -1,0 +1,193 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_structs.h"
+
+const SKP_uint8 SKP_Silk_NLSF_CB1_WB_Q8[ 512 ] = {
+ 7, 23, 38, 54, 69, 85, 100, 116,
+ 131, 147, 162, 178, 193, 208, 223, 239,
+ 13, 25, 41, 55, 69, 83, 98, 112,
+ 127, 142, 157, 171, 187, 203, 220, 236,
+ 15, 21, 34, 51, 61, 78, 92, 106,
+ 126, 136, 152, 167, 185, 205, 225, 240,
+ 10, 21, 36, 50, 63, 79, 95, 110,
+ 126, 141, 157, 173, 189, 205, 221, 237,
+ 17, 20, 37, 51, 59, 78, 89, 107,
+ 123, 134, 150, 164, 184, 205, 224, 240,
+ 10, 15, 32, 51, 67, 81, 96, 112,
+ 129, 142, 158, 173, 189, 204, 220, 236,
+ 8, 21, 37, 51, 65, 79, 98, 113,
+ 126, 138, 155, 168, 179, 192, 209, 218,
+ 12, 15, 34, 55, 63, 78, 87, 108,
+ 118, 131, 148, 167, 185, 203, 219, 236,
+ 16, 19, 32, 36, 56, 79, 91, 108,
+ 118, 136, 154, 171, 186, 204, 220, 237,
+ 11, 28, 43, 58, 74, 89, 105, 120,
+ 135, 150, 165, 180, 196, 211, 226, 241,
+ 6, 16, 33, 46, 60, 75, 92, 107,
+ 123, 137, 156, 169, 185, 199, 214, 225,
+ 11, 19, 30, 44, 57, 74, 89, 105,
+ 121, 135, 152, 169, 186, 202, 218, 234,
+ 12, 19, 29, 46, 57, 71, 88, 100,
+ 120, 132, 148, 165, 182, 199, 216, 233,
+ 17, 23, 35, 46, 56, 77, 92, 106,
+ 123, 134, 152, 167, 185, 204, 222, 237,
+ 14, 17, 45, 53, 63, 75, 89, 107,
+ 115, 132, 151, 171, 188, 206, 221, 240,
+ 9, 16, 29, 40, 56, 71, 88, 103,
+ 119, 137, 154, 171, 189, 205, 222, 237,
+ 16, 19, 36, 48, 57, 76, 87, 105,
+ 118, 132, 150, 167, 185, 202, 218, 236,
+ 12, 17, 29, 54, 71, 81, 94, 104,
+ 126, 136, 149, 164, 182, 201, 221, 237,
+ 15, 28, 47, 62, 79, 97, 115, 129,
+ 142, 155, 168, 180, 194, 208, 223, 238,
+ 8, 14, 30, 45, 62, 78, 94, 111,
+ 127, 143, 159, 175, 192, 207, 223, 239,
+ 17, 30, 49, 62, 79, 92, 107, 119,
+ 132, 145, 160, 174, 190, 204, 220, 235,
+ 14, 19, 36, 45, 61, 76, 91, 108,
+ 121, 138, 154, 172, 189, 205, 222, 238,
+ 12, 18, 31, 45, 60, 76, 91, 107,
+ 123, 138, 154, 171, 187, 204, 221, 236,
+ 13, 17, 31, 43, 53, 70, 83, 103,
+ 114, 131, 149, 167, 185, 203, 220, 237,
+ 17, 22, 35, 42, 58, 78, 93, 110,
+ 125, 139, 155, 170, 188, 206, 224, 240,
+ 8, 15, 34, 50, 67, 83, 99, 115,
+ 131, 146, 162, 178, 193, 209, 224, 239,
+ 13, 16, 41, 66, 73, 86, 95, 111,
+ 128, 137, 150, 163, 183, 206, 225, 241,
+ 17, 25, 37, 52, 63, 75, 92, 102,
+ 119, 132, 144, 160, 175, 191, 212, 231,
+ 19, 31, 49, 65, 83, 100, 117, 133,
+ 147, 161, 174, 187, 200, 213, 227, 242,
+ 18, 31, 52, 68, 88, 103, 117, 126,
+ 138, 149, 163, 177, 192, 207, 223, 239,
+ 16, 29, 47, 61, 76, 90, 106, 119,
+ 133, 147, 161, 176, 193, 209, 224, 240,
+ 15, 21, 35, 50, 61, 73, 86, 97,
+ 110, 119, 129, 141, 175, 198, 218, 237
+};
+
+const SKP_uint8 SKP_Silk_NLSF_CB1_iCDF_WB[ 64 ] = {
+ 225, 204, 201, 184, 183, 175, 158, 154,
+ 153, 135, 119, 115, 113, 110, 109, 99,
+ 98, 95, 79, 68, 52, 50, 48, 45,
+ 43, 32, 31, 27, 18, 10, 3, 0,
+ 255, 251, 235, 230, 212, 201, 196, 182,
+ 167, 166, 163, 151, 138, 124, 110, 104,
+ 90, 78, 76, 70, 69, 57, 45, 34,
+ 24, 21, 11, 6, 5, 4, 3, 0
+};
+
+const SKP_uint8 SKP_Silk_NLSF_CB2_SELECT_WB[ 256 ] = {
+ 0, 0, 0, 0, 0, 0, 0, 1,
+ 100, 102, 102, 68, 68, 36, 34, 96,
+ 164, 107, 158, 185, 180, 185, 139, 102,
+ 64, 66, 36, 34, 34, 0, 1, 32,
+ 208, 139, 141, 191, 152, 185, 155, 104,
+ 96, 171, 104, 166, 102, 102, 102, 132,
+ 1, 0, 0, 0, 0, 16, 16, 0,
+ 80, 109, 78, 107, 185, 139, 103, 101,
+ 208, 212, 141, 139, 173, 153, 123, 103,
+ 36, 0, 0, 0, 0, 0, 0, 1,
+ 48, 0, 0, 0, 0, 0, 0, 32,
+ 68, 135, 123, 119, 119, 103, 69, 98,
+ 68, 103, 120, 118, 118, 102, 71, 98,
+ 134, 136, 157, 184, 182, 153, 139, 134,
+ 208, 168, 248, 75, 189, 143, 121, 107,
+ 32, 49, 34, 34, 34, 0, 17, 2,
+ 210, 235, 139, 123, 185, 137, 105, 134,
+ 98, 135, 104, 182, 100, 183, 171, 134,
+ 100, 70, 68, 70, 66, 66, 34, 131,
+ 64, 166, 102, 68, 36, 2, 1, 0,
+ 134, 166, 102, 68, 34, 34, 66, 132,
+ 212, 246, 158, 139, 107, 107, 87, 102,
+ 100, 219, 125, 122, 137, 118, 103, 132,
+ 114, 135, 137, 105, 171, 106, 50, 34,
+ 164, 214, 141, 143, 185, 151, 121, 103,
+ 192, 34, 0, 0, 0, 0, 0, 1,
+ 208, 109, 74, 187, 134, 249, 159, 137,
+ 102, 110, 154, 118, 87, 101, 119, 101,
+ 0, 2, 0, 36, 36, 66, 68, 35,
+ 96, 164, 102, 100, 36, 0, 2, 33,
+ 167, 138, 174, 102, 100, 84, 2, 2,
+ 100, 107, 120, 119, 36, 197, 24, 0
+};
+
+const SKP_uint8 SKP_Silk_NLSF_CB2_iCDF_WB[ 72 ] = {
+ 255, 254, 253, 244, 12, 3, 2, 1,
+ 0, 255, 254, 252, 224, 38, 3, 2,
+ 1, 0, 255, 254, 251, 209, 57, 4,
+ 2, 1, 0, 255, 254, 244, 195, 69,
+ 4, 2, 1, 0, 255, 251, 232, 184,
+ 84, 7, 2, 1, 0, 255, 254, 240,
+ 186, 86, 14, 2, 1, 0, 255, 254,
+ 239, 178, 91, 30, 5, 1, 0, 255,
+ 248, 227, 177, 100, 19, 2, 1, 0
+};
+
+const SKP_uint8 SKP_Silk_NLSF_CB2_BITS_WB_Q5[ 72 ] = {
+ 255, 255, 255, 156, 4, 154, 255, 255,
+ 255, 255, 255, 227, 102, 15, 92, 255,
+ 255, 255, 255, 255, 213, 83, 24, 72,
+ 236, 255, 255, 255, 255, 150, 76, 33,
+ 63, 214, 255, 255, 255, 190, 121, 77,
+ 43, 55, 185, 255, 255, 255, 245, 137,
+ 71, 43, 59, 139, 255, 255, 255, 255,
+ 131, 66, 50, 66, 107, 194, 255, 255,
+ 166, 116, 76, 55, 53, 125, 255, 255
+};
+
+const SKP_uint8 SKP_Silk_NLSF_PRED_WB_Q8[ 30 ] = {
+ 175, 148, 160, 176, 178, 173, 174, 164,
+ 177, 174, 196, 182, 198, 192, 182, 68,
+ 62, 66, 60, 72, 117, 85, 90, 118,
+ 136, 151, 142, 160, 142, 155
+};
+
+const SKP_int16 SKP_Silk_NLSF_DELTA_MIN_WB_Q15[ 17 ] = {
+ 121, 3, 42, 3, 3, 3, 5, 14,
+ 14, 10, 11, 3, 8, 9, 7, 3,
+ 347
+};
+
+const SKP_Silk_NLSF_CB_struct SKP_Silk_NLSF_CB_WB =
+{
+ 32,
+ 16,
+ SKP_FIX_CONST( 0.16, 16 ),
+ SKP_FIX_CONST( 1.0 / 0.16, 6 ),
+ SKP_Silk_NLSF_CB1_WB_Q8,
+ SKP_Silk_NLSF_CB1_iCDF_WB,
+ SKP_Silk_NLSF_PRED_WB_Q8,
+ SKP_Silk_NLSF_CB2_SELECT_WB,
+ SKP_Silk_NLSF_CB2_iCDF_WB,
+ SKP_Silk_NLSF_CB2_BITS_WB_Q5,
+ SKP_Silk_NLSF_DELTA_MIN_WB_Q15,
+};
--- /dev/null
+++ b/src_common/SKP_Silk_tables_gain.c
@@ -1,0 +1,59 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_tables.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+const SKP_uint8 SKP_Silk_gain_iCDF[ 3 ][ N_LEVELS_QGAIN / 8 ] =
+{
+{
+ 224, 112, 44, 15, 3, 2, 1, 0
+},
+{
+ 254, 237, 192, 132, 70, 23, 4, 0
+},
+{
+ 255, 252, 226, 155, 61, 11, 2, 0
+}
+};
+
+const SKP_uint8 SKP_Silk_delta_gain_iCDF[ MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 ] = {
+ 250, 245, 234, 203, 71, 50, 42, 38,
+ 35, 33, 31, 29, 28, 27, 26, 25,
+ 24, 23, 22, 21, 20, 19, 18, 17,
+ 16, 15, 14, 13, 12, 11, 10, 9,
+ 8, 7, 6, 5, 4, 3, 2, 1,
+ 0
+};
+
+#ifdef __cplusplus
+}
+#endif
--- /dev/null
+++ b/src_common/SKP_Silk_tables_other.c
@@ -1,0 +1,123 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_structs.h"
+#include "SKP_Silk_define.h"
+#include "SKP_Silk_tables.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/* Piece-wise linear mapping from bitrate in kbps to coding quality in dB SNR */
+const SKP_int32 TargetRate_table_NB[ TARGET_RATE_TAB_SZ ] = {
+ 0, 8000, 9400, 11500, 13500, 17500, 25000, MAX_TARGET_RATE_BPS
+};
+const SKP_int32 TargetRate_table_MB[ TARGET_RATE_TAB_SZ ] = {
+ 0, 9000, 11800, 14200, 17700, 23700, 34400, MAX_TARGET_RATE_BPS
+};
+const SKP_int32 TargetRate_table_WB[ TARGET_RATE_TAB_SZ ] = {
+ 0, 10500, 14000, 17000, 21300, 28000, 41500, MAX_TARGET_RATE_BPS
+};
+const SKP_int16 SNR_table_Q1[ TARGET_RATE_TAB_SZ ] = {
+ 19, 29, 35, 39, 44, 50, 60, 80
+};
+
+/* Table for stereo predictor coding */
+/* p = [2.^(-7:-1), 1, fliplr(2.^(-7:-1))]+2e-2; p = p/sum(p); fprintf('%d, ', round(256 - 256 * cumsum(p(1:end-1)))) */
+const SKP_uint8 SKP_Silk_stereo_predictor_iCDF[ STEREO_QUANT_STEPS + 1 ] = { 254, 251, 247, 241, 229, 208, 168, 88, 48, 27, 15, 9, 5, 2 };
+
+/* Tables for LBRR flags */
+const SKP_uint8 SKP_Silk_LBRR_flags_2_iCDF[ 3 ] = { 203, 150, 0 };
+const SKP_uint8 SKP_Silk_LBRR_flags_3_iCDF[ 7 ] = { 215, 195, 166, 125, 110, 82, 0 };
+const SKP_uint8 * const SKP_Silk_LBRR_flags_iCDF_ptr[ 2 ] = {
+ SKP_Silk_LBRR_flags_2_iCDF,
+ SKP_Silk_LBRR_flags_3_iCDF
+};
+
+/* Table for LSB coding */
+const SKP_uint8 SKP_Silk_lsb_iCDF[ 2 ] = { 120, 0 };
+
+/* Tables for LTPScale */
+const SKP_uint8 SKP_Silk_LTPscale_iCDF[ 3 ] = { 128, 64, 0 };
+
+/* Tables for signal type and offset coding */
+const SKP_uint8 SKP_Silk_type_offset_VAD_iCDF[ 4 ] = {
+ 232, 158, 10, 0
+};
+const SKP_uint8 SKP_Silk_type_offset_no_VAD_iCDF[ 2 ] = {
+ 230, 0
+};
+
+/* Tables for NLSF interpolation factor */
+const SKP_uint8 SKP_Silk_NLSF_interpolation_factor_iCDF[ 5 ] = { 243, 221, 192, 181, 0 };
+
+/* Quantization offsets */
+const SKP_int16 SKP_Silk_Quantization_Offsets_Q10[ 2 ][ 2 ] = {
+ { OFFSET_UVL_Q10, OFFSET_UVH_Q10 }, { OFFSET_VL_Q10, OFFSET_VH_Q10 }
+};
+
+/* Table for LTPScale */
+const SKP_int16 SKP_Silk_LTPScales_table_Q14[ 3 ] = { 15565, 12288, 8192 };
+
+/* Uniform entropy tables */
+const SKP_uint8 SKP_Silk_uniform2_iCDF[ 2 ] = { 128, 0 };
+const SKP_uint8 SKP_Silk_uniform4_iCDF[ 4 ] = { 192, 128, 64, 0 };
+const SKP_uint8 SKP_Silk_uniform6_iCDF[ 6 ] = { 213, 171, 128, 85, 43, 0 };
+const SKP_uint8 SKP_Silk_uniform8_iCDF[ 8 ] = { 224, 192, 160, 128, 96, 64, 32, 0 };
+
+const SKP_uint8 SKP_Silk_NLSF_EXT_iCDF[ 7 ] = { 100, 40, 16, 7, 3, 1, 0 };
+
+/* Elliptic/Cauer filters designed with 0.1 dB passband ripple,
+ 80 dB minimum stopband attenuation, and
+ [0.95 : 0.15 : 0.35] normalized cut off frequencies. */
+
+/* Interpolation points for filter coefficients used in the bandwidth transition smoother */
+const SKP_int32 SKP_Silk_Transition_LP_B_Q28[ TRANSITION_INT_NUM ][ TRANSITION_NB ] =
+{
+{ 250767114, 501534038, 250767114 },
+{ 209867381, 419732057, 209867381 },
+{ 170987846, 341967853, 170987846 },
+{ 131531482, 263046905, 131531482 },
+{ 89306658, 178584282, 89306658 }
+};
+
+/* Interpolation points for filter coefficients used in the bandwidth transition smoother */
+const SKP_int32 SKP_Silk_Transition_LP_A_Q28[ TRANSITION_INT_NUM ][ TRANSITION_NA ] =
+{
+{ 506393414, 239854379 },
+{ 411067935, 169683996 },
+{ 306733530, 116694253 },
+{ 185807084, 77959395 },
+{ 35497197, 57401098 }
+};
+
+#ifdef __cplusplus
+}
+#endif
+
--- /dev/null
+++ b/src_common/SKP_Silk_tables_pitch_lag.c
@@ -1,0 +1,65 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_tables.h"
+
+const SKP_uint8 SKP_Silk_pitch_lag_iCDF[ 2 * ( PITCH_EST_MAX_LAG_MS - PITCH_EST_MIN_LAG_MS ) ] = {
+ 253, 250, 244, 233, 212, 182, 150, 131,
+ 120, 110, 98, 85, 72, 60, 49, 40,
+ 32, 25, 19, 15, 13, 11, 9, 8,
+ 7, 6, 5, 4, 3, 2, 1, 0
+};
+
+const SKP_uint8 SKP_Silk_pitch_delta_iCDF[21] = {
+ 210, 208, 206, 203, 199, 193, 183, 168,
+ 142, 104, 74, 52, 37, 27, 20, 14,
+ 10, 6, 4, 2, 0
+};
+
+const SKP_uint8 SKP_Silk_pitch_contour_iCDF[34] = {
+ 223, 201, 183, 167, 152, 138, 124, 111,
+ 98, 88, 79, 70, 62, 56, 50, 44,
+ 39, 35, 31, 27, 24, 21, 18, 16,
+ 14, 12, 10, 8, 6, 4, 3, 2,
+ 1, 0
+};
+
+const SKP_uint8 SKP_Silk_pitch_contour_NB_iCDF[11] = {
+ 188, 176, 155, 138, 119, 97, 67, 43,
+ 26, 10, 0
+};
+
+const SKP_uint8 SKP_Silk_pitch_contour_10_ms_iCDF[12] = {
+ 165, 119, 80, 61, 47, 35, 27, 20,
+ 14, 9, 4, 0
+};
+
+const SKP_uint8 SKP_Silk_pitch_contour_10_ms_NB_iCDF[3] = {
+ 113, 63, 0
+};
+
+
--- /dev/null
+++ b/src_common/SKP_Silk_tables_pulses_per_block.c
@@ -1,0 +1,229 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#include "SKP_Silk_tables.h"
+
+const SKP_uint8 SKP_Silk_max_pulses_table[ 4 ] = {
+ 8, 10, 12, 16
+};
+
+const SKP_uint8 SKP_Silk_pulses_per_block_iCDF[ 10 ][ 18 ] = {
+{
+ 125, 51, 26, 18, 15, 12, 11, 10,
+ 9, 8, 7, 6, 5, 4, 3, 2,
+ 1, 0
+},
+{
+ 198, 105, 45, 22, 15, 12, 11, 10,
+ 9, 8, 7, 6, 5, 4, 3, 2,
+ 1, 0
+},
+{
+ 213, 162, 116, 83, 59, 43, 32, 24,
+ 18, 15, 12, 9, 7, 6, 5, 3,
+ 2, 0
+},
+{
+ 239, 187, 116, 59, 28, 16, 11, 10,
+ 9, 8, 7, 6, 5, 4, 3, 2,
+ 1, 0
+},
+{
+ 250, 229, 188, 135, 86, 51, 30, 19,
+ 13, 10, 8, 6, 5, 4, 3, 2,
+ 1, 0
+},
+{
+ 249, 235, 213, 185, 156, 128, 103, 83,
+ 66, 53, 42, 33, 26, 21, 17, 13,
+ 10, 0
+},
+{
+ 254, 249, 235, 206, 164, 118, 77, 46,
+ 27, 16, 10, 7, 5, 4, 3, 2,
+ 1, 0
+},
+{
+ 255, 253, 249, 239, 220, 191, 156, 119,
+ 85, 57, 37, 23, 15, 10, 6, 4,
+ 2, 0
+},
+{
+ 255, 253, 251, 246, 237, 223, 203, 179,
+ 152, 124, 98, 75, 55, 40, 29, 21,
+ 15, 0
+},
+{
+ 255, 254, 253, 247, 220, 162, 106, 67,
+ 42, 28, 18, 12, 9, 6, 4, 3,
+ 2, 0
+}
+};
+
+const SKP_uint8 SKP_Silk_pulses_per_block_BITS_Q5[ 9 ][ 18 ] = {
+{
+ 31, 57, 107, 160, 205, 205, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255
+},
+{
+ 69, 47, 67, 111, 166, 205, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255
+},
+{
+ 82, 74, 79, 95, 109, 128, 145, 160,
+ 173, 205, 205, 205, 224, 255, 255, 224,
+ 255, 224
+},
+{
+ 125, 74, 59, 69, 97, 141, 182, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255
+},
+{
+ 173, 115, 85, 73, 76, 92, 115, 145,
+ 173, 205, 224, 224, 255, 255, 255, 255,
+ 255, 255
+},
+{
+ 166, 134, 113, 102, 101, 102, 107, 118,
+ 125, 138, 145, 155, 166, 182, 192, 192,
+ 205, 150
+},
+{
+ 224, 182, 134, 101, 83, 79, 85, 97,
+ 120, 145, 173, 205, 224, 255, 255, 255,
+ 255, 255
+},
+{
+ 255, 224, 192, 150, 120, 101, 92, 89,
+ 93, 102, 118, 134, 160, 182, 192, 224,
+ 224, 224
+},
+{
+ 255, 224, 224, 182, 155, 134, 118, 109,
+ 104, 102, 106, 111, 118, 131, 145, 160,
+ 173, 131
+}
+};
+
+const SKP_uint8 SKP_Silk_rate_levels_iCDF[ 2 ][ 9 ] =
+{
+{
+ 241, 190, 178, 132, 87, 74, 41, 14,
+ 0
+},
+{
+ 223, 193, 157, 140, 106, 57, 39, 18,
+ 0
+}
+};
+
+const SKP_uint8 SKP_Silk_rate_levels_BITS_Q5[ 2 ][ 9 ] =
+{
+{
+ 131, 74, 141, 79, 80, 138, 95, 104,
+ 134
+},
+{
+ 95, 99, 91, 125, 93, 76, 123, 115,
+ 123
+}
+};
+
+const SKP_uint8 SKP_Silk_shell_code_table0[ 44 ] = {
+ 128, 0, 214, 42, 0, 235, 128, 21,
+ 0, 244, 184, 72, 11, 0, 248, 214,
+ 128, 42, 7, 0, 248, 225, 170, 80,
+ 25, 5, 0, 251, 236, 198, 126, 54,
+ 18, 3, 0, 250, 238, 211, 159, 82,
+ 35, 15, 5, 0
+};
+
+const SKP_uint8 SKP_Silk_shell_code_table1[ 65 ] = {
+ 129, 0, 207, 50, 0, 236, 129, 20,
+ 0, 245, 185, 72, 10, 0, 249, 213,
+ 129, 42, 6, 0, 250, 226, 169, 87,
+ 27, 4, 0, 251, 233, 194, 130, 62,
+ 20, 4, 0, 250, 236, 207, 160, 99,
+ 47, 17, 3, 0, 255, 240, 217, 182,
+ 131, 81, 41, 11, 1, 0, 255, 254,
+ 233, 201, 159, 107, 61, 20, 2, 1,
+ 0
+};
+
+const SKP_uint8 SKP_Silk_shell_code_table2[ 90 ] = {
+ 129, 0, 203, 54, 0, 234, 129, 23,
+ 0, 245, 184, 73, 10, 0, 250, 215,
+ 129, 41, 5, 0, 252, 232, 173, 86,
+ 24, 3, 0, 253, 240, 200, 129, 56,
+ 15, 2, 0, 253, 244, 217, 164, 94,
+ 38, 10, 1, 0, 253, 245, 226, 189,
+ 132, 71, 27, 7, 1, 0, 253, 246,
+ 231, 203, 159, 105, 56, 23, 6, 1,
+ 0, 255, 248, 235, 213, 179, 133, 85,
+ 47, 19, 5, 1, 0, 255, 254, 243,
+ 221, 194, 159, 117, 70, 37, 12, 2,
+ 1, 0
+};
+
+const SKP_uint8 SKP_Silk_shell_code_table3[ 152 ] = {
+ 130, 0, 200, 58, 0, 231, 130, 26,
+ 0, 244, 184, 76, 12, 0, 249, 214,
+ 130, 43, 6, 0, 252, 232, 173, 87,
+ 24, 3, 0, 253, 241, 203, 131, 56,
+ 14, 2, 0, 254, 246, 221, 167, 94,
+ 35, 8, 1, 0, 254, 249, 232, 193,
+ 130, 65, 23, 5, 1, 0, 255, 251,
+ 239, 211, 162, 99, 45, 15, 4, 1,
+ 0, 255, 251, 243, 223, 186, 131, 74,
+ 33, 11, 3, 1, 0, 255, 252, 245,
+ 230, 202, 158, 105, 57, 24, 8, 2,
+ 1, 0, 255, 253, 247, 235, 214, 179,
+ 132, 84, 44, 19, 7, 2, 1, 0,
+ 255, 254, 250, 240, 223, 196, 159, 112,
+ 69, 36, 15, 6, 2, 1, 0, 255,
+ 254, 253, 245, 231, 209, 176, 136, 93,
+ 55, 27, 11, 3, 2, 1, 0, 255,
+ 254, 253, 252, 239, 221, 194, 158, 117,
+ 76, 42, 18, 4, 3, 2, 1, 0
+};
+
+const SKP_uint8 SKP_Silk_shell_code_table_offsets[ 17 ] = {
+ 0, 0, 2, 5, 9, 14, 20, 27,
+ 35, 44, 54, 65, 77, 90, 104, 119,
+ 135
+};
+
+const SKP_uint8 SKP_Silk_sign_iCDF[ 36 ] = {
+ 49, 67, 77, 82, 93, 99, 11, 18,
+ 24, 31, 36, 45, 46, 66, 78, 87,
+ 94, 104, 14, 21, 32, 42, 51, 66,
+ 94, 104, 109, 112, 115, 118, 53, 69,
+ 80, 88, 95, 102
+};
--- /dev/null
+++ b/src_common/SKP_Silk_tuning_parameters.h
@@ -1,0 +1,169 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifndef SKP_SILK_TUNING_PARAMETERS_H
+#define SKP_SILK_TUNING_PARAMETERS_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/*******************/
+/* Pitch estimator */
+/*******************/
+
+/* Level of noise floor for whitening filter LPC analysis in pitch analysis */
+#define FIND_PITCH_WHITE_NOISE_FRACTION 1e-3f
+
+/* Bandwidth expansion for whitening filter in pitch analysis */
+#define FIND_PITCH_BANDWITH_EXPANSION 0.99f
+
+/*********************/
+/* Linear prediction */
+/*********************/
+
+/* LPC analysis defines: regularization and bandwidth expansion */
+#define FIND_LPC_COND_FAC 2.5e-5f
+#define FIND_LPC_CHIRP 0.99995f
+#define FIND_LPC_CHIRP_FIRST_FRAME 0.96f
+
+/* LTP analysis defines */
+#define FIND_LTP_COND_FAC 1e-5f
+#define LTP_DAMPING 0.01f
+#define LTP_SMOOTHING 0.1f
+
+/* LTP quantization settings */
+#define MU_LTP_QUANT_NB 0.03f
+#define MU_LTP_QUANT_MB 0.025f
+#define MU_LTP_QUANT_WB 0.02f
+
+/***********************/
+/* High pass filtering */
+/***********************/
+
+/* Smoothing parameters for low end of pitch frequency range estimation */
+#define VARIABLE_HP_SMTH_COEF1 0.1f
+#define VARIABLE_HP_SMTH_COEF2 0.015f
+
+/* Min and max values for low end of pitch frequency range estimation */
+#define VARIABLE_HP_MIN_FREQ 80.0f
+#define VARIABLE_HP_MAX_FREQ 150.0f
+
+/* Max absolute difference between log2 of pitch frequency and smoother state, to enter the smoother */
+#define VARIABLE_HP_MAX_DELTA_FREQ 0.4f
+
+/***********/
+/* Various */
+/***********/
+
+/* VAD threshold */
+#define SPEECH_ACTIVITY_DTX_THRES 0.05f
+
+/* Speech Activity LBRR enable threshold */
+#define LBRR_SPEECH_ACTIVITY_THRES 0.3f
+
+/*************************/
+/* Perceptual parameters */
+/*************************/
+
+/* reduction in coding SNR during low speech activity */
+#define BG_SNR_DECR_dB 4.0f
+
+/* factor for reducing quantization noise during voiced speech */
+#define HARM_SNR_INCR_dB 2.0f
+
+/* factor for reducing quantization noise for unvoiced sparse signals */
+#define SPARSE_SNR_INCR_dB 2.0f
+
+/* threshold for sparseness measure above which to use lower quantization offset during unvoiced */
+#define SPARSENESS_THRESHOLD_QNT_OFFSET 0.75f
+
+/* warping control */
+#define WARPING_MULTIPLIER 0.015f
+
+/* fraction added to first autocorrelation value */
+#define SHAPE_WHITE_NOISE_FRACTION 1e-5f
+
+/* noise shaping filter chirp factor */
+#define BANDWIDTH_EXPANSION 0.95f
+
+/* difference between chirp factors for analysis and synthesis noise shaping filters at low bitrates */
+#define LOW_RATE_BANDWIDTH_EXPANSION_DELTA 0.01f
+
+/* extra harmonic boosting (signal shaping) at low bitrates */
+#define LOW_RATE_HARMONIC_BOOST 0.1f
+
+/* extra harmonic boosting (signal shaping) for noisy input signals */
+#define LOW_INPUT_QUALITY_HARMONIC_BOOST 0.1f
+
+/* harmonic noise shaping */
+#define HARMONIC_SHAPING 0.3f
+
+/* extra harmonic noise shaping for high bitrates or noisy input */
+#define HIGH_RATE_OR_LOW_QUALITY_HARMONIC_SHAPING 0.2f
+
+/* parameter for shaping noise towards higher frequencies */
+#define HP_NOISE_COEF 0.3f
+
+/* parameter for shaping noise even more towards higher frequencies during voiced speech */
+#define HARM_HP_NOISE_COEF 0.35f
+
+/* parameter for applying a high-pass tilt to the input signal */
+#define INPUT_TILT 0.05f
+
+/* parameter for extra high-pass tilt to the input signal at high rates */
+#define HIGH_RATE_INPUT_TILT 0.1f
+
+/* parameter for reducing noise at the very low frequencies */
+#define LOW_FREQ_SHAPING 4.0f
+
+/* less reduction of noise at the very low frequencies for signals with low SNR at low frequencies */
+#define LOW_QUALITY_LOW_FREQ_SHAPING_DECR 0.5f
+
+/* subframe smoothing coefficient for HarmBoost, HarmShapeGain, Tilt (lower -> more smoothing) */
+#define SUBFR_SMTH_COEF 0.4f
+
+/* parameters defining the R/D tradeoff in the residual quantizer */
+#define LAMBDA_OFFSET 1.3f
+#define LAMBDA_SPEECH_ACT -0.3f
+#define LAMBDA_DELAYED_DECISIONS -0.05f
+#define LAMBDA_INPUT_QUALITY -0.2f
+#define LAMBDA_CODING_QUALITY -0.1f
+#define LAMBDA_QUANT_OFFSET 1.5f
+
+/* Compensation in bitrate calculations for 10 ms modes */
+#define REDUCE_BITRATE_10_MS_BPS 2200
+
+/* Maximum time before allowing a bandwidth transition */
+#define MAX_BANDWIDTH_SWITCH_DELAY_MS 5000
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // SKP_SILK_TUNING_PARAMETERS_H
--- /dev/null
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@@ -1,0 +1,136 @@
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+ </ItemDefinitionGroup>
+ <ItemGroup>
+ <None Include="ReadMe.txt" />
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+ <ItemGroup>
+ <ClInclude Include="..\interface\SKP_Silk_control.h" />
+ <ClInclude Include="..\interface\SKP_Silk_errors.h" />
+ <ClInclude Include="SKP_Silk_define.h" />
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+ <ClInclude Include="SKP_Silk_structs.h" />
+ <ClInclude Include="SKP_Silk_tables.h" />
+ <ClInclude Include="SKP_Silk_tuning_parameters.h" />
+ </ItemGroup>
+ <ItemGroup>
+ <ClCompile Include="SKP_Silk_check_control_input.c" />
+ <ClCompile Include="SKP_Silk_CNG.c" />
+ <ClCompile Include="SKP_Silk_code_signs.c" />
+ <ClCompile Include="SKP_Silk_control_audio_bandwidth.c" />
+ <ClCompile Include="SKP_Silk_control_codec.c" />
+ <ClCompile Include="SKP_Silk_control_SNR.c" />
+ <ClCompile Include="SKP_Silk_create_init_destroy.c" />
+ <ClCompile Include="SKP_Silk_decoder_set_fs.c" />
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+ <ClCompile Include="SKP_Silk_enc_API.c" />
+ <ClCompile Include="SKP_Silk_gain_quant.c" />
+ <ClCompile Include="SKP_Silk_HP_variable_cutoff.c" />
+ <ClCompile Include="SKP_Silk_init_encoder.c" />
+ <ClCompile Include="SKP_Silk_interpolate.c" />
+ <ClCompile Include="SKP_Silk_LP_variable_cutoff.c" />
+ <ClCompile Include="SKP_Silk_NLSF2A_stable.c" />
+ <ClCompile Include="SKP_Silk_NLSF_decode.c" />
+ <ClCompile Include="SKP_Silk_NLSF_del_dec_quant.c" />
+ <ClCompile Include="SKP_Silk_NLSF_encode.c" />
+ <ClCompile Include="SKP_Silk_NLSF_unpack.c" />
+ <ClCompile Include="SKP_Silk_NLSF_VQ.c" />
+ <ClCompile Include="SKP_Silk_NSQ.c" />
+ <ClCompile Include="SKP_Silk_NSQ_del_dec.c" />
+ <ClCompile Include="SKP_Silk_PLC.c" />
+ <ClCompile Include="SKP_Silk_process_NLSFs.c" />
+ <ClCompile Include="SKP_Silk_quant_LTP_gains.c" />
+ <ClCompile Include="SKP_Silk_shell_coder.c" />
+ <ClCompile Include="SKP_Silk_stereo_LR_to_MS.c" />
+ <ClCompile Include="SKP_Silk_stereo_MS_to_LR.c" />
+ <ClCompile Include="SKP_Silk_tables_gain.c" />
+ <ClCompile Include="SKP_Silk_tables_LTP.c" />
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+</Project>
\ No newline at end of file
--- /dev/null
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@@ -1,0 +1,183 @@
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+ <ItemGroup>
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+ <ClInclude Include="SKP_Silk_define.h">
+ <Filter>Header Files</Filter>
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+ <Filter>Source Files</Filter>
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+ <Filter>Source Files</Filter>
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+ <Filter>Source Files</Filter>
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--
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