ref: 912b2ee70e9087b2e2510db01b4d65806e7c9d78
dir: /libfaad/specrec.c/
/*
** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
** Copyright (C) 2003-2005 M. Bakker, Nero AG, http://www.nero.com
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
**
** Any non-GPL usage of this software or parts of this software is strictly
** forbidden.
**
** The "appropriate copyright message" mentioned in section 2c of the GPLv2
** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"
**
** Commercial non-GPL licensing of this software is possible.
** For more info contact Nero AG through Mpeg4AAClicense@nero.com.
**
** $Id: specrec.c,v 1.63 2010/06/04 20:47:56 menno Exp $
**/
/*
Spectral reconstruction:
- grouping/sectioning
- inverse quantization
- applying scalefactors
*/
#include "common.h"
#include "structs.h"
#include <string.h>
#include <stdlib.h>
#include "specrec.h"
#include "filtbank.h"
#include "syntax.h"
#include "iq_table.h"
#include "ms.h"
#include "is.h"
#include "pns.h"
#include "tns.h"
#include "drc.h"
#include "lt_predict.h"
#include "ic_predict.h"
#ifdef SSR_DEC
#include "ssr.h"
#include "ssr_fb.h"
#endif
/* static function declarations */
static uint8_t quant_to_spec(NeAACDecStruct *hDecoder,
ic_stream *ics, int16_t *quant_data,
real_t *spec_data, uint16_t frame_len);
#ifdef LD_DEC
ALIGN static const uint8_t num_swb_512_window[] =
{
0, 0, 0, 36, 36, 37, 31, 31, 0, 0, 0, 0
};
ALIGN static const uint8_t num_swb_480_window[] =
{
0, 0, 0, 35, 35, 37, 30, 30, 0, 0, 0, 0
};
#endif
ALIGN static const uint8_t num_swb_960_window[] =
{
40, 40, 45, 49, 49, 49, 46, 46, 42, 42, 42, 40
};
ALIGN static const uint8_t num_swb_1024_window[] =
{
41, 41, 47, 49, 49, 51, 47, 47, 43, 43, 43, 40
};
ALIGN static const uint8_t num_swb_128_window[] =
{
12, 12, 12, 14, 14, 14, 15, 15, 15, 15, 15, 15
};
ALIGN static const uint16_t swb_offset_1024_96[] =
{
0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56,
64, 72, 80, 88, 96, 108, 120, 132, 144, 156, 172, 188, 212, 240,
276, 320, 384, 448, 512, 576, 640, 704, 768, 832, 896, 960, 1024
};
ALIGN static const uint16_t swb_offset_128_96[] =
{
0, 4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 92, 128
};
ALIGN static const uint16_t swb_offset_1024_64[] =
{
0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56,
64, 72, 80, 88, 100, 112, 124, 140, 156, 172, 192, 216, 240, 268,
304, 344, 384, 424, 464, 504, 544, 584, 624, 664, 704, 744, 784, 824,
864, 904, 944, 984, 1024
};
ALIGN static const uint16_t swb_offset_128_64[] =
{
0, 4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 92, 128
};
ALIGN static const uint16_t swb_offset_1024_48[] =
{
0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 48, 56, 64, 72,
80, 88, 96, 108, 120, 132, 144, 160, 176, 196, 216, 240, 264, 292,
320, 352, 384, 416, 448, 480, 512, 544, 576, 608, 640, 672, 704, 736,
768, 800, 832, 864, 896, 928, 1024
};
#ifdef LD_DEC
ALIGN static const uint16_t swb_offset_512_48[] =
{
0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 68, 76, 84,
92, 100, 112, 124, 136, 148, 164, 184, 208, 236, 268, 300, 332, 364, 396,
428, 460, 512
};
ALIGN static const uint16_t swb_offset_480_48[] =
{
0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 64, 72 ,80 ,88,
96, 108, 120, 132, 144, 156, 172, 188, 212, 240, 272, 304, 336, 368, 400,
432, 480
};
#endif
ALIGN static const uint16_t swb_offset_128_48[] =
{
0, 4, 8, 12, 16, 20, 28, 36, 44, 56, 68, 80, 96, 112, 128
};
ALIGN static const uint16_t swb_offset_1024_32[] =
{
0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 48, 56, 64, 72,
80, 88, 96, 108, 120, 132, 144, 160, 176, 196, 216, 240, 264, 292,
320, 352, 384, 416, 448, 480, 512, 544, 576, 608, 640, 672, 704, 736,
768, 800, 832, 864, 896, 928, 960, 992, 1024
};
#ifdef LD_DEC
ALIGN static const uint16_t swb_offset_512_32[] =
{
0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 64, 72, 80,
88, 96, 108, 120, 132, 144, 160, 176, 192, 212, 236, 260, 288, 320, 352,
384, 416, 448, 480, 512
};
ALIGN static const uint16_t swb_offset_480_32[] =
{
0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 72, 80,
88, 96, 104, 112, 124, 136, 148, 164, 180, 200, 224, 256, 288, 320, 352,
384, 416, 448, 480
};
#endif
ALIGN static const uint16_t swb_offset_1024_24[] =
{
0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 52, 60, 68,
76, 84, 92, 100, 108, 116, 124, 136, 148, 160, 172, 188, 204, 220,
240, 260, 284, 308, 336, 364, 396, 432, 468, 508, 552, 600, 652, 704,
768, 832, 896, 960, 1024
};
#ifdef LD_DEC
ALIGN static const uint16_t swb_offset_512_24[] =
{
0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 52, 60, 68,
80, 92, 104, 120, 140, 164, 192, 224, 256, 288, 320, 352, 384, 416,
448, 480, 512
};
ALIGN static const uint16_t swb_offset_480_24[] =
{
0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 52, 60, 68, 80, 92, 104, 120,
140, 164, 192, 224, 256, 288, 320, 352, 384, 416, 448, 480
};
#endif
ALIGN static const uint16_t swb_offset_128_24[] =
{
0, 4, 8, 12, 16, 20, 24, 28, 36, 44, 52, 64, 76, 92, 108, 128
};
ALIGN static const uint16_t swb_offset_1024_16[] =
{
0, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 100, 112, 124,
136, 148, 160, 172, 184, 196, 212, 228, 244, 260, 280, 300, 320, 344,
368, 396, 424, 456, 492, 532, 572, 616, 664, 716, 772, 832, 896, 960, 1024
};
ALIGN static const uint16_t swb_offset_128_16[] =
{
0, 4, 8, 12, 16, 20, 24, 28, 32, 40, 48, 60, 72, 88, 108, 128
};
ALIGN static const uint16_t swb_offset_1024_8[] =
{
0, 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144, 156, 172,
188, 204, 220, 236, 252, 268, 288, 308, 328, 348, 372, 396, 420, 448,
476, 508, 544, 580, 620, 664, 712, 764, 820, 880, 944, 1024
};
ALIGN static const uint16_t swb_offset_128_8[] =
{
0, 4, 8, 12, 16, 20, 24, 28, 36, 44, 52, 60, 72, 88, 108, 128
};
ALIGN static const uint16_t *swb_offset_1024_window[] =
{
swb_offset_1024_96, /* 96000 */
swb_offset_1024_96, /* 88200 */
swb_offset_1024_64, /* 64000 */
swb_offset_1024_48, /* 48000 */
swb_offset_1024_48, /* 44100 */
swb_offset_1024_32, /* 32000 */
swb_offset_1024_24, /* 24000 */
swb_offset_1024_24, /* 22050 */
swb_offset_1024_16, /* 16000 */
swb_offset_1024_16, /* 12000 */
swb_offset_1024_16, /* 11025 */
swb_offset_1024_8 /* 8000 */
};
#ifdef LD_DEC
ALIGN static const uint16_t *swb_offset_512_window[] =
{
0, /* 96000 */
0, /* 88200 */
0, /* 64000 */
swb_offset_512_48, /* 48000 */
swb_offset_512_48, /* 44100 */
swb_offset_512_32, /* 32000 */
swb_offset_512_24, /* 24000 */
swb_offset_512_24, /* 22050 */
0, /* 16000 */
0, /* 12000 */
0, /* 11025 */
0 /* 8000 */
};
ALIGN static const uint16_t *swb_offset_480_window[] =
{
0, /* 96000 */
0, /* 88200 */
0, /* 64000 */
swb_offset_480_48, /* 48000 */
swb_offset_480_48, /* 44100 */
swb_offset_480_32, /* 32000 */
swb_offset_480_24, /* 24000 */
swb_offset_480_24, /* 22050 */
0, /* 16000 */
0, /* 12000 */
0, /* 11025 */
0 /* 8000 */
};
#endif
ALIGN static const uint16_t *swb_offset_128_window[] =
{
swb_offset_128_96, /* 96000 */
swb_offset_128_96, /* 88200 */
swb_offset_128_64, /* 64000 */
swb_offset_128_48, /* 48000 */
swb_offset_128_48, /* 44100 */
swb_offset_128_48, /* 32000 */
swb_offset_128_24, /* 24000 */
swb_offset_128_24, /* 22050 */
swb_offset_128_16, /* 16000 */
swb_offset_128_16, /* 12000 */
swb_offset_128_16, /* 11025 */
swb_offset_128_8 /* 8000 */
};
#define bit_set(A, B) ((A) & (1<<(B)))
/* 4.5.2.3.4 */
/*
- determine the number of windows in a window_sequence named num_windows
- determine the number of window_groups named num_window_groups
- determine the number of windows in each group named window_group_length[g]
- determine the total number of scalefactor window bands named num_swb for
the actual window type
- determine swb_offset[swb], the offset of the first coefficient in
scalefactor window band named swb of the window actually used
- determine sect_sfb_offset[g][section],the offset of the first coefficient
in section named section. This offset depends on window_sequence and
scale_factor_grouping and is needed to decode the spectral_data().
*/
uint8_t window_grouping_info(NeAACDecStruct *hDecoder, ic_stream *ics)
{
uint8_t i, g;
uint8_t sf_index = hDecoder->sf_index;
switch (ics->window_sequence) {
case ONLY_LONG_SEQUENCE:
case LONG_START_SEQUENCE:
case LONG_STOP_SEQUENCE:
ics->num_windows = 1;
ics->num_window_groups = 1;
ics->window_group_length[ics->num_window_groups-1] = 1;
#ifdef LD_DEC
if (hDecoder->object_type == LD)
{
if (hDecoder->frameLength == 512)
ics->num_swb = num_swb_512_window[sf_index];
else /* if (hDecoder->frameLength == 480) */
ics->num_swb = num_swb_480_window[sf_index];
} else {
#endif
if (hDecoder->frameLength == 1024)
ics->num_swb = num_swb_1024_window[sf_index];
else /* if (hDecoder->frameLength == 960) */
ics->num_swb = num_swb_960_window[sf_index];
#ifdef LD_DEC
}
#endif
if (ics->max_sfb > ics->num_swb)
{
return 32;
}
/* preparation of sect_sfb_offset for long blocks */
/* also copy the last value! */
#ifdef LD_DEC
if (hDecoder->object_type == LD)
{
if (hDecoder->frameLength == 512)
{
for (i = 0; i < ics->num_swb; i++)
{
ics->sect_sfb_offset[0][i] = swb_offset_512_window[sf_index][i];
ics->swb_offset[i] = swb_offset_512_window[sf_index][i];
}
} else /* if (hDecoder->frameLength == 480) */ {
for (i = 0; i < ics->num_swb; i++)
{
ics->sect_sfb_offset[0][i] = swb_offset_480_window[sf_index][i];
ics->swb_offset[i] = swb_offset_480_window[sf_index][i];
}
}
ics->sect_sfb_offset[0][ics->num_swb] = hDecoder->frameLength;
ics->swb_offset[ics->num_swb] = hDecoder->frameLength;
ics->swb_offset_max = hDecoder->frameLength;
} else {
#endif
for (i = 0; i < ics->num_swb; i++)
{
ics->sect_sfb_offset[0][i] = swb_offset_1024_window[sf_index][i];
ics->swb_offset[i] = swb_offset_1024_window[sf_index][i];
}
ics->sect_sfb_offset[0][ics->num_swb] = hDecoder->frameLength;
ics->swb_offset[ics->num_swb] = hDecoder->frameLength;
ics->swb_offset_max = hDecoder->frameLength;
#ifdef LD_DEC
}
#endif
return 0;
case EIGHT_SHORT_SEQUENCE:
ics->num_windows = 8;
ics->num_window_groups = 1;
ics->window_group_length[ics->num_window_groups-1] = 1;
ics->num_swb = num_swb_128_window[sf_index];
if (ics->max_sfb > ics->num_swb)
{
return 32;
}
for (i = 0; i < ics->num_swb; i++)
ics->swb_offset[i] = swb_offset_128_window[sf_index][i];
ics->swb_offset[ics->num_swb] = hDecoder->frameLength/8;
ics->swb_offset_max = hDecoder->frameLength/8;
for (i = 0; i < ics->num_windows-1; i++) {
if (bit_set(ics->scale_factor_grouping, 6-i) == 0)
{
ics->num_window_groups += 1;
ics->window_group_length[ics->num_window_groups-1] = 1;
} else {
ics->window_group_length[ics->num_window_groups-1] += 1;
}
}
/* preparation of sect_sfb_offset for short blocks */
for (g = 0; g < ics->num_window_groups; g++)
{
uint16_t width;
uint8_t sect_sfb = 0;
uint16_t offset = 0;
for (i = 0; i < ics->num_swb; i++)
{
if (i+1 == ics->num_swb)
{
width = (hDecoder->frameLength/8) - swb_offset_128_window[sf_index][i];
} else {
width = swb_offset_128_window[sf_index][i+1] -
swb_offset_128_window[sf_index][i];
}
width *= ics->window_group_length[g];
ics->sect_sfb_offset[g][sect_sfb++] = offset;
offset += width;
}
ics->sect_sfb_offset[g][sect_sfb] = offset;
}
return 0;
default:
return 32;
}
}
/* iquant() *
/* output = sign(input)*abs(input)^(4/3) */
/**/
static INLINE real_t iquant(int16_t q, const real_t *tab, uint8_t *error)
{
#ifdef FIXED_POINT
/* For FIXED_POINT the iq_table is prescaled by 3 bits (iq_table[]/8) */
/* BIG_IQ_TABLE allows you to use the full 8192 value table, if this is not
* defined a 1026 value table and interpolation will be used
*/
#ifndef BIG_IQ_TABLE
static const real_t errcorr[] = {
REAL_CONST(0), REAL_CONST(1.0/8.0), REAL_CONST(2.0/8.0), REAL_CONST(3.0/8.0),
REAL_CONST(4.0/8.0), REAL_CONST(5.0/8.0), REAL_CONST(6.0/8.0), REAL_CONST(7.0/8.0),
REAL_CONST(0)
};
real_t x1, x2;
#endif
int16_t sgn = 1;
if (q < 0)
{
q = -q;
sgn = -1;
}
if (q < IQ_TABLE_SIZE)
{
//#define IQUANT_PRINT
#ifdef IQUANT_PRINT
//printf("0x%.8X\n", sgn * tab[q]);
printf("%d\n", sgn * tab[q]);
#endif
return sgn * tab[q];
}
#ifndef BIG_IQ_TABLE
if (q >= 8192)
{
*error = 17;
return 0;
}
/* linear interpolation */
x1 = tab[q>>3];
x2 = tab[(q>>3) + 1];
return sgn * 16 * (MUL_R(errcorr[q&7],(x2-x1)) + x1);
#else
*error = 17;
return 0;
#endif
#else
if (q < 0)
{
/* tab contains a value for all possible q [0,8192] */
if (-q < IQ_TABLE_SIZE)
return -tab[-q];
*error = 17;
return 0;
} else {
/* tab contains a value for all possible q [0,8192] */
if (q < IQ_TABLE_SIZE)
return tab[q];
*error = 17;
return 0;
}
#endif
}
#ifndef FIXED_POINT
ALIGN static const real_t pow2sf_tab[] = {
2.9802322387695313E-008, 5.9604644775390625E-008, 1.1920928955078125E-007,
2.384185791015625E-007, 4.76837158203125E-007, 9.5367431640625E-007,
1.9073486328125E-006, 3.814697265625E-006, 7.62939453125E-006,
1.52587890625E-005, 3.0517578125E-005, 6.103515625E-005,
0.0001220703125, 0.000244140625, 0.00048828125,
0.0009765625, 0.001953125, 0.00390625,
0.0078125, 0.015625, 0.03125,
0.0625, 0.125, 0.25,
0.5, 1.0, 2.0,
4.0, 8.0, 16.0, 32.0,
64.0, 128.0, 256.0,
512.0, 1024.0, 2048.0,
4096.0, 8192.0, 16384.0,
32768.0, 65536.0, 131072.0,
262144.0, 524288.0, 1048576.0,
2097152.0, 4194304.0, 8388608.0,
16777216.0, 33554432.0, 67108864.0,
134217728.0, 268435456.0, 536870912.0,
1073741824.0, 2147483648.0, 4294967296.0,
8589934592.0, 17179869184.0, 34359738368.0,
68719476736.0, 137438953472.0, 274877906944.0
};
#endif
/* quant_to_spec: perform dequantisation and scaling
* and in case of short block it also does the deinterleaving
*/
/*
For ONLY_LONG_SEQUENCE windows (num_window_groups = 1,
window_group_length[0] = 1) the spectral data is in ascending spectral
order.
For the EIGHT_SHORT_SEQUENCE window, the spectral order depends on the
grouping in the following manner:
- Groups are ordered sequentially
- Within a group, a scalefactor band consists of the spectral data of all
grouped SHORT_WINDOWs for the associated scalefactor window band. To
clarify via example, the length of a group is in the range of one to eight
SHORT_WINDOWs.
- If there are eight groups each with length one (num_window_groups = 8,
window_group_length[0..7] = 1), the result is a sequence of eight spectra,
each in ascending spectral order.
- If there is only one group with length eight (num_window_groups = 1,
window_group_length[0] = 8), the result is that spectral data of all eight
SHORT_WINDOWs is interleaved by scalefactor window bands.
- Within a scalefactor window band, the coefficients are in ascending
spectral order.
*/
static uint8_t quant_to_spec(NeAACDecStruct *hDecoder,
ic_stream *ics, int16_t *quant_data,
real_t *spec_data, uint16_t frame_len)
{
ALIGN static const real_t pow2_table[] =
{
COEF_CONST(1.0),
COEF_CONST(1.1892071150027210667174999705605), /* 2^0.25 */
COEF_CONST(1.4142135623730950488016887242097), /* 2^0.5 */
COEF_CONST(1.6817928305074290860622509524664) /* 2^0.75 */
};
const real_t *tab = iq_table;
uint8_t g, sfb, win;
uint16_t width, bin, k, gindex, wa, wb;
uint8_t error = 0; /* Init error flag */
#ifndef FIXED_POINT
real_t scf;
#endif
k = 0;
gindex = 0;
for (g = 0; g < ics->num_window_groups; g++)
{
uint16_t j = 0;
uint16_t gincrease = 0;
uint16_t win_inc = ics->swb_offset[ics->num_swb];
for (sfb = 0; sfb < ics->num_swb; sfb++)
{
int32_t exp, frac;
width = ics->swb_offset[sfb+1] - ics->swb_offset[sfb];
/* this could be scalefactor for IS or PNS, those can be negative or bigger then 255 */
/* just ignore them */
if (ics->scale_factors[g][sfb] < 0 || ics->scale_factors[g][sfb] > 255)
{
exp = 0;
frac = 0;
} else {
/* ics->scale_factors[g][sfb] must be between 0 and 255 */
exp = (ics->scale_factors[g][sfb] /* - 100 */) >> 2;
/* frac must always be > 0 */
frac = (ics->scale_factors[g][sfb] /* - 100 */) & 3;
}
#ifdef FIXED_POINT
exp -= 25;
/* IMDCT pre-scaling */
if (hDecoder->object_type == LD)
{
exp -= 6 /*9*/;
} else {
if (ics->window_sequence == EIGHT_SHORT_SEQUENCE)
exp -= 4 /*7*/;
else
exp -= 7 /*10*/;
}
#endif
wa = gindex + j;
#ifndef FIXED_POINT
scf = pow2sf_tab[exp/*+25*/] * pow2_table[frac];
#endif
for (win = 0; win < ics->window_group_length[g]; win++)
{
for (bin = 0; bin < width; bin += 4)
{
#ifndef FIXED_POINT
wb = wa + bin;
spec_data[wb+0] = iquant(quant_data[k+0], tab, &error) * scf;
spec_data[wb+1] = iquant(quant_data[k+1], tab, &error) * scf;
spec_data[wb+2] = iquant(quant_data[k+2], tab, &error) * scf;
spec_data[wb+3] = iquant(quant_data[k+3], tab, &error) * scf;
#else
real_t iq0 = iquant(quant_data[k+0], tab, &error);
real_t iq1 = iquant(quant_data[k+1], tab, &error);
real_t iq2 = iquant(quant_data[k+2], tab, &error);
real_t iq3 = iquant(quant_data[k+3], tab, &error);
wb = wa + bin;
if (exp < 0)
{
spec_data[wb+0] = iq0 >>= -exp;
spec_data[wb+1] = iq1 >>= -exp;
spec_data[wb+2] = iq2 >>= -exp;
spec_data[wb+3] = iq3 >>= -exp;
} else {
spec_data[wb+0] = iq0 <<= exp;
spec_data[wb+1] = iq1 <<= exp;
spec_data[wb+2] = iq2 <<= exp;
spec_data[wb+3] = iq3 <<= exp;
}
if (frac != 0)
{
spec_data[wb+0] = MUL_C(spec_data[wb+0],pow2_table[frac]);
spec_data[wb+1] = MUL_C(spec_data[wb+1],pow2_table[frac]);
spec_data[wb+2] = MUL_C(spec_data[wb+2],pow2_table[frac]);
spec_data[wb+3] = MUL_C(spec_data[wb+3],pow2_table[frac]);
}
//#define SCFS_PRINT
#ifdef SCFS_PRINT
printf("%d\n", spec_data[gindex+(win*win_inc)+j+bin+0]);
printf("%d\n", spec_data[gindex+(win*win_inc)+j+bin+1]);
printf("%d\n", spec_data[gindex+(win*win_inc)+j+bin+2]);
printf("%d\n", spec_data[gindex+(win*win_inc)+j+bin+3]);
//printf("0x%.8X\n", spec_data[gindex+(win*win_inc)+j+bin+0]);
//printf("0x%.8X\n", spec_data[gindex+(win*win_inc)+j+bin+1]);
//printf("0x%.8X\n", spec_data[gindex+(win*win_inc)+j+bin+2]);
//printf("0x%.8X\n", spec_data[gindex+(win*win_inc)+j+bin+3]);
#endif
#endif
gincrease += 4;
k += 4;
}
wa += win_inc;
}
j += width;
}
gindex += gincrease;
}
return error;
}
static uint8_t allocate_single_channel(NeAACDecStruct *hDecoder, uint8_t channel,
uint8_t output_channels)
{
int mul = 1;
#ifdef MAIN_DEC
/* MAIN object type prediction */
if (hDecoder->object_type == MAIN)
{
/* allocate the state only when needed */
if (hDecoder->pred_stat[channel] != NULL)
{
faad_free(hDecoder->pred_stat[channel]);
hDecoder->pred_stat[channel] = NULL;
}
hDecoder->pred_stat[channel] = (pred_state*)faad_malloc(hDecoder->frameLength * sizeof(pred_state));
reset_all_predictors(hDecoder->pred_stat[channel], hDecoder->frameLength);
}
#endif
#ifdef LTP_DEC
if (is_ltp_ot(hDecoder->object_type))
{
/* allocate the state only when needed */
if (hDecoder->lt_pred_stat[channel] != NULL)
{
faad_free(hDecoder->lt_pred_stat[channel]);
hDecoder->lt_pred_stat[channel] = NULL;
}
hDecoder->lt_pred_stat[channel] = (int16_t*)faad_malloc(hDecoder->frameLength*4 * sizeof(int16_t));
memset(hDecoder->lt_pred_stat[channel], 0, hDecoder->frameLength*4 * sizeof(int16_t));
}
#endif
if (hDecoder->time_out[channel] != NULL)
{
faad_free(hDecoder->time_out[channel]);
hDecoder->time_out[channel] = NULL;
}
{
mul = 1;
#ifdef SBR_DEC
hDecoder->sbr_alloced[hDecoder->fr_ch_ele] = 0;
if ((hDecoder->sbr_present_flag == 1) || (hDecoder->forceUpSampling == 1))
{
/* SBR requires 2 times as much output data */
mul = 2;
hDecoder->sbr_alloced[hDecoder->fr_ch_ele] = 1;
}
#endif
hDecoder->time_out[channel] = (real_t*)faad_malloc(mul*hDecoder->frameLength*sizeof(real_t));
memset(hDecoder->time_out[channel], 0, mul*hDecoder->frameLength*sizeof(real_t));
}
#if (defined(PS_DEC) || defined(DRM_PS))
if (output_channels == 2)
{
if (hDecoder->time_out[channel+1] != NULL)
{
faad_free(hDecoder->time_out[channel+1]);
hDecoder->time_out[channel+1] = NULL;
}
hDecoder->time_out[channel+1] = (real_t*)faad_malloc(mul*hDecoder->frameLength*sizeof(real_t));
memset(hDecoder->time_out[channel+1], 0, mul*hDecoder->frameLength*sizeof(real_t));
}
#endif
if (hDecoder->fb_intermed[channel] != NULL)
{
faad_free(hDecoder->fb_intermed[channel]);
hDecoder->fb_intermed[channel] = NULL;
}
hDecoder->fb_intermed[channel] = (real_t*)faad_malloc(hDecoder->frameLength*sizeof(real_t));
memset(hDecoder->fb_intermed[channel], 0, hDecoder->frameLength*sizeof(real_t));
#ifdef SSR_DEC
if (hDecoder->object_type == SSR)
{
if (hDecoder->ssr_overlap[channel] == NULL)
{
hDecoder->ssr_overlap[channel] = (real_t*)faad_malloc(2*hDecoder->frameLength*sizeof(real_t));
memset(hDecoder->ssr_overlap[channel], 0, 2*hDecoder->frameLength*sizeof(real_t));
}
if (hDecoder->prev_fmd[channel] == NULL)
{
uint16_t k;
hDecoder->prev_fmd[channel] = (real_t*)faad_malloc(2*hDecoder->frameLength*sizeof(real_t));
for (k = 0; k < 2*hDecoder->frameLength; k++)
hDecoder->prev_fmd[channel][k] = REAL_CONST(-1);
}
}
#endif
return 0;
}
static uint8_t allocate_channel_pair(NeAACDecStruct *hDecoder,
uint8_t channel, uint8_t paired_channel)
{
int mul = 1;
#ifdef MAIN_DEC
/* MAIN object type prediction */
if (hDecoder->object_type == MAIN)
{
/* allocate the state only when needed */
if (hDecoder->pred_stat[channel] == NULL)
{
hDecoder->pred_stat[channel] = (pred_state*)faad_malloc(hDecoder->frameLength * sizeof(pred_state));
reset_all_predictors(hDecoder->pred_stat[channel], hDecoder->frameLength);
}
if (hDecoder->pred_stat[paired_channel] == NULL)
{
hDecoder->pred_stat[paired_channel] = (pred_state*)faad_malloc(hDecoder->frameLength * sizeof(pred_state));
reset_all_predictors(hDecoder->pred_stat[paired_channel], hDecoder->frameLength);
}
}
#endif
#ifdef LTP_DEC
if (is_ltp_ot(hDecoder->object_type))
{
/* allocate the state only when needed */
if (hDecoder->lt_pred_stat[channel] == NULL)
{
hDecoder->lt_pred_stat[channel] = (int16_t*)faad_malloc(hDecoder->frameLength*4 * sizeof(int16_t));
memset(hDecoder->lt_pred_stat[channel], 0, hDecoder->frameLength*4 * sizeof(int16_t));
}
if (hDecoder->lt_pred_stat[paired_channel] == NULL)
{
hDecoder->lt_pred_stat[paired_channel] = (int16_t*)faad_malloc(hDecoder->frameLength*4 * sizeof(int16_t));
memset(hDecoder->lt_pred_stat[paired_channel], 0, hDecoder->frameLength*4 * sizeof(int16_t));
}
}
#endif
if (hDecoder->time_out[channel] == NULL)
{
mul = 1;
#ifdef SBR_DEC
hDecoder->sbr_alloced[hDecoder->fr_ch_ele] = 0;
if ((hDecoder->sbr_present_flag == 1) || (hDecoder->forceUpSampling == 1))
{
/* SBR requires 2 times as much output data */
mul = 2;
hDecoder->sbr_alloced[hDecoder->fr_ch_ele] = 1;
}
#endif
hDecoder->time_out[channel] = (real_t*)faad_malloc(mul*hDecoder->frameLength*sizeof(real_t));
memset(hDecoder->time_out[channel], 0, mul*hDecoder->frameLength*sizeof(real_t));
}
if (hDecoder->time_out[paired_channel] == NULL)
{
hDecoder->time_out[paired_channel] = (real_t*)faad_malloc(mul*hDecoder->frameLength*sizeof(real_t));
memset(hDecoder->time_out[paired_channel], 0, mul*hDecoder->frameLength*sizeof(real_t));
}
if (hDecoder->fb_intermed[channel] == NULL)
{
hDecoder->fb_intermed[channel] = (real_t*)faad_malloc(hDecoder->frameLength*sizeof(real_t));
memset(hDecoder->fb_intermed[channel], 0, hDecoder->frameLength*sizeof(real_t));
}
if (hDecoder->fb_intermed[paired_channel] == NULL)
{
hDecoder->fb_intermed[paired_channel] = (real_t*)faad_malloc(hDecoder->frameLength*sizeof(real_t));
memset(hDecoder->fb_intermed[paired_channel], 0, hDecoder->frameLength*sizeof(real_t));
}
#ifdef SSR_DEC
if (hDecoder->object_type == SSR)
{
if (hDecoder->ssr_overlap[cpe->channel] == NULL)
{
hDecoder->ssr_overlap[cpe->channel] = (real_t*)faad_malloc(2*hDecoder->frameLength*sizeof(real_t));
memset(hDecoder->ssr_overlap[cpe->channel], 0, 2*hDecoder->frameLength*sizeof(real_t));
}
if (hDecoder->ssr_overlap[cpe->paired_channel] == NULL)
{
hDecoder->ssr_overlap[cpe->paired_channel] = (real_t*)faad_malloc(2*hDecoder->frameLength*sizeof(real_t));
memset(hDecoder->ssr_overlap[cpe->paired_channel], 0, 2*hDecoder->frameLength*sizeof(real_t));
}
if (hDecoder->prev_fmd[cpe->channel] == NULL)
{
uint16_t k;
hDecoder->prev_fmd[cpe->channel] = (real_t*)faad_malloc(2*hDecoder->frameLength*sizeof(real_t));
for (k = 0; k < 2*hDecoder->frameLength; k++)
hDecoder->prev_fmd[cpe->channel][k] = REAL_CONST(-1);
}
if (hDecoder->prev_fmd[cpe->paired_channel] == NULL)
{
uint16_t k;
hDecoder->prev_fmd[cpe->paired_channel] = (real_t*)faad_malloc(2*hDecoder->frameLength*sizeof(real_t));
for (k = 0; k < 2*hDecoder->frameLength; k++)
hDecoder->prev_fmd[cpe->paired_channel][k] = REAL_CONST(-1);
}
}
#endif
return 0;
}
uint8_t reconstruct_single_channel(NeAACDecStruct *hDecoder, ic_stream *ics,
element *sce, int16_t *spec_data)
{
uint8_t retval;
int output_channels;
ALIGN real_t spec_coef[1024];
#ifdef PROFILE
int64_t count = faad_get_ts();
#endif
/* always allocate 2 channels, PS can always "suddenly" turn up */
#if ( (defined(DRM) && defined(DRM_PS)) )
output_channels = 2;
#elif defined(PS_DEC)
if (hDecoder->ps_used[hDecoder->fr_ch_ele])
output_channels = 2;
else
output_channels = 1;
#else
output_channels = 1;
#endif
if (hDecoder->element_output_channels[hDecoder->fr_ch_ele] == 0)
{
/* element_output_channels not set yet */
hDecoder->element_output_channels[hDecoder->fr_ch_ele] = output_channels;
} else if (hDecoder->element_output_channels[hDecoder->fr_ch_ele] != output_channels) {
/* element inconsistency */
/* this only happens if PS is actually found but not in the first frame
* this means that there is only 1 bitstream element!
*/
/* reset the allocation */
hDecoder->element_alloced[hDecoder->fr_ch_ele] = 0;
hDecoder->element_output_channels[hDecoder->fr_ch_ele] = output_channels;
//return 21;
}
if (hDecoder->element_alloced[hDecoder->fr_ch_ele] == 0)
{
retval = allocate_single_channel(hDecoder, sce->channel, output_channels);
if (retval > 0)
return retval;
hDecoder->element_alloced[hDecoder->fr_ch_ele] = 1;
}
/* sanity check, CVE-2018-20199, CVE-2018-20360 */
if(!hDecoder->time_out[sce->channel])
return 15;
/* dequantisation and scaling */
retval = quant_to_spec(hDecoder, ics, spec_data, spec_coef, hDecoder->frameLength);
if (retval > 0)
return retval;
#ifdef PROFILE
count = faad_get_ts() - count;
hDecoder->requant_cycles += count;
#endif
/* pns decoding */
pns_decode(ics, NULL, spec_coef, NULL, hDecoder->frameLength, 0, hDecoder->object_type,
&(hDecoder->__r1), &(hDecoder->__r2));
#ifdef MAIN_DEC
/* MAIN object type prediction */
if (hDecoder->object_type == MAIN)
{
if (!hDecoder->pred_stat[sce->channel])
return 33;
/* intra channel prediction */
ic_prediction(ics, spec_coef, hDecoder->pred_stat[sce->channel], hDecoder->frameLength,
hDecoder->sf_index);
/* In addition, for scalefactor bands coded by perceptual
noise substitution the predictors belonging to the
corresponding spectral coefficients are reset.
*/
pns_reset_pred_state(ics, hDecoder->pred_stat[sce->channel]);
}
#endif
#ifdef LTP_DEC
if (is_ltp_ot(hDecoder->object_type))
{
#ifdef LD_DEC
if (hDecoder->object_type == LD)
{
if (ics->ltp.data_present)
{
if (ics->ltp.lag_update)
hDecoder->ltp_lag[sce->channel] = ics->ltp.lag;
}
ics->ltp.lag = hDecoder->ltp_lag[sce->channel];
}
#endif
/* long term prediction */
lt_prediction(ics, &(ics->ltp), spec_coef, hDecoder->lt_pred_stat[sce->channel], hDecoder->fb,
ics->window_shape, hDecoder->window_shape_prev[sce->channel],
hDecoder->sf_index, hDecoder->object_type, hDecoder->frameLength);
}
#endif
/* tns decoding */
tns_decode_frame(ics, &(ics->tns), hDecoder->sf_index, hDecoder->object_type,
spec_coef, hDecoder->frameLength);
/* drc decoding */
if (hDecoder->drc->present)
{
if (!hDecoder->drc->exclude_mask[sce->channel] || !hDecoder->drc->excluded_chns_present)
drc_decode(hDecoder->drc, spec_coef);
}
/* filter bank */
#ifdef SSR_DEC
if (hDecoder->object_type != SSR)
{
#endif
ifilter_bank(hDecoder->fb, ics->window_sequence, ics->window_shape,
hDecoder->window_shape_prev[sce->channel], spec_coef,
hDecoder->time_out[sce->channel], hDecoder->fb_intermed[sce->channel],
hDecoder->object_type, hDecoder->frameLength);
#ifdef SSR_DEC
} else {
ssr_decode(&(ics->ssr), hDecoder->fb, ics->window_sequence, ics->window_shape,
hDecoder->window_shape_prev[sce->channel], spec_coef, hDecoder->time_out[sce->channel],
hDecoder->ssr_overlap[sce->channel], hDecoder->ipqf_buffer[sce->channel], hDecoder->prev_fmd[sce->channel],
hDecoder->frameLength);
}
#endif
/* save window shape for next frame */
hDecoder->window_shape_prev[sce->channel] = ics->window_shape;
#ifdef LTP_DEC
if (is_ltp_ot(hDecoder->object_type))
{
lt_update_state(hDecoder->lt_pred_stat[sce->channel], hDecoder->time_out[sce->channel],
hDecoder->fb_intermed[sce->channel], hDecoder->frameLength, hDecoder->object_type);
}
#endif
#ifdef SBR_DEC
if (((hDecoder->sbr_present_flag == 1) || (hDecoder->forceUpSampling == 1))
&& hDecoder->sbr_alloced[hDecoder->fr_ch_ele])
{
int ele = hDecoder->fr_ch_ele;
int ch = sce->channel;
/* following case can happen when forceUpSampling == 1 */
if (hDecoder->sbr[ele] == NULL)
{
hDecoder->sbr[ele] = sbrDecodeInit(hDecoder->frameLength,
hDecoder->element_id[ele], 2*get_sample_rate(hDecoder->sf_index),
hDecoder->downSampledSBR
#ifdef DRM
, 0
#endif
);
}
if (sce->ics1.window_sequence == EIGHT_SHORT_SEQUENCE)
hDecoder->sbr[ele]->maxAACLine = 8*min(sce->ics1.swb_offset[max(sce->ics1.max_sfb-1, 0)], sce->ics1.swb_offset_max);
else
hDecoder->sbr[ele]->maxAACLine = min(sce->ics1.swb_offset[max(sce->ics1.max_sfb-1, 0)], sce->ics1.swb_offset_max);
/* check if any of the PS tools is used */
#if (defined(PS_DEC) || defined(DRM_PS))
if (hDecoder->ps_used[ele] == 0)
{
#endif
retval = sbrDecodeSingleFrame(hDecoder->sbr[ele], hDecoder->time_out[ch],
hDecoder->postSeekResetFlag, hDecoder->downSampledSBR);
#if (defined(PS_DEC) || defined(DRM_PS))
} else {
retval = sbrDecodeSingleFramePS(hDecoder->sbr[ele], hDecoder->time_out[ch],
hDecoder->time_out[ch+1], hDecoder->postSeekResetFlag,
hDecoder->downSampledSBR);
}
#endif
if (retval > 0)
return retval;
} else if (((hDecoder->sbr_present_flag == 1) || (hDecoder->forceUpSampling == 1))
&& !hDecoder->sbr_alloced[hDecoder->fr_ch_ele])
{
return 23;
}
#endif
/* copy L to R when no PS is used */
#if (defined(PS_DEC) || defined(DRM_PS))
if ((hDecoder->ps_used[hDecoder->fr_ch_ele] == 0) &&
(hDecoder->element_output_channels[hDecoder->fr_ch_ele] == 2))
{
int ele = hDecoder->fr_ch_ele;
int ch = sce->channel;
int frame_size = (hDecoder->sbr_alloced[ele]) ? 2 : 1;
frame_size *= hDecoder->frameLength*sizeof(real_t);
memcpy(hDecoder->time_out[ch+1], hDecoder->time_out[ch], frame_size);
}
#endif
return 0;
}
uint8_t reconstruct_channel_pair(NeAACDecStruct *hDecoder, ic_stream *ics1, ic_stream *ics2,
element *cpe, int16_t *spec_data1, int16_t *spec_data2)
{
uint8_t retval;
ALIGN real_t spec_coef1[1024];
ALIGN real_t spec_coef2[1024];
#ifdef PROFILE
int64_t count = faad_get_ts();
#endif
if (hDecoder->element_alloced[hDecoder->fr_ch_ele] != 2)
{
retval = allocate_channel_pair(hDecoder, cpe->channel, (uint8_t)cpe->paired_channel);
if (retval > 0)
return retval;
hDecoder->element_alloced[hDecoder->fr_ch_ele] = 2;
}
/* sanity check, CVE-2018-20199, CVE-2018-20360 */
if(!hDecoder->time_out[cpe->channel])
return 15;
/* dequantisation and scaling */
retval = quant_to_spec(hDecoder, ics1, spec_data1, spec_coef1, hDecoder->frameLength);
if (retval > 0)
return retval;
retval = quant_to_spec(hDecoder, ics2, spec_data2, spec_coef2, hDecoder->frameLength);
if (retval > 0)
return retval;
#ifdef PROFILE
count = faad_get_ts() - count;
hDecoder->requant_cycles += count;
#endif
/* pns decoding */
if (ics1->ms_mask_present)
{
pns_decode(ics1, ics2, spec_coef1, spec_coef2, hDecoder->frameLength, 1, hDecoder->object_type,
&(hDecoder->__r1), &(hDecoder->__r2));
} else {
pns_decode(ics1, ics2, spec_coef1, spec_coef2, hDecoder->frameLength, 0, hDecoder->object_type,
&(hDecoder->__r1), &(hDecoder->__r2));
}
/* mid/side decoding */
ms_decode(ics1, ics2, spec_coef1, spec_coef2, hDecoder->frameLength);
#if 0
{
int i;
for (i = 0; i < 1024; i++)
{
//printf("%d\n", spec_coef1[i]);
printf("0x%.8X\n", spec_coef1[i]);
}
for (i = 0; i < 1024; i++)
{
//printf("%d\n", spec_coef2[i]);
printf("0x%.8X\n", spec_coef2[i]);
}
}
#endif
/* intensity stereo decoding */
is_decode(ics1, ics2, spec_coef1, spec_coef2, hDecoder->frameLength);
#if 0
{
int i;
for (i = 0; i < 1024; i++)
{
printf("%d\n", spec_coef1[i]);
//printf("0x%.8X\n", spec_coef1[i]);
}
for (i = 0; i < 1024; i++)
{
printf("%d\n", spec_coef2[i]);
//printf("0x%.8X\n", spec_coef2[i]);
}
}
#endif
#ifdef MAIN_DEC
/* MAIN object type prediction */
if (hDecoder->object_type == MAIN)
{
/* intra channel prediction */
ic_prediction(ics1, spec_coef1, hDecoder->pred_stat[cpe->channel], hDecoder->frameLength,
hDecoder->sf_index);
ic_prediction(ics2, spec_coef2, hDecoder->pred_stat[cpe->paired_channel], hDecoder->frameLength,
hDecoder->sf_index);
/* In addition, for scalefactor bands coded by perceptual
noise substitution the predictors belonging to the
corresponding spectral coefficients are reset.
*/
pns_reset_pred_state(ics1, hDecoder->pred_stat[cpe->channel]);
pns_reset_pred_state(ics2, hDecoder->pred_stat[cpe->paired_channel]);
}
#endif
#ifdef LTP_DEC
if (is_ltp_ot(hDecoder->object_type))
{
ltp_info *ltp1 = &(ics1->ltp);
ltp_info *ltp2 = (cpe->common_window) ? &(ics2->ltp2) : &(ics2->ltp);
#ifdef LD_DEC
if (hDecoder->object_type == LD)
{
if (ltp1->data_present)
{
if (ltp1->lag_update)
hDecoder->ltp_lag[cpe->channel] = ltp1->lag;
}
ltp1->lag = hDecoder->ltp_lag[cpe->channel];
if (ltp2->data_present)
{
if (ltp2->lag_update)
hDecoder->ltp_lag[cpe->paired_channel] = ltp2->lag;
}
ltp2->lag = hDecoder->ltp_lag[cpe->paired_channel];
}
#endif
/* long term prediction */
lt_prediction(ics1, ltp1, spec_coef1, hDecoder->lt_pred_stat[cpe->channel], hDecoder->fb,
ics1->window_shape, hDecoder->window_shape_prev[cpe->channel],
hDecoder->sf_index, hDecoder->object_type, hDecoder->frameLength);
lt_prediction(ics2, ltp2, spec_coef2, hDecoder->lt_pred_stat[cpe->paired_channel], hDecoder->fb,
ics2->window_shape, hDecoder->window_shape_prev[cpe->paired_channel],
hDecoder->sf_index, hDecoder->object_type, hDecoder->frameLength);
}
#endif
/* tns decoding */
tns_decode_frame(ics1, &(ics1->tns), hDecoder->sf_index, hDecoder->object_type,
spec_coef1, hDecoder->frameLength);
tns_decode_frame(ics2, &(ics2->tns), hDecoder->sf_index, hDecoder->object_type,
spec_coef2, hDecoder->frameLength);
/* drc decoding */
if (hDecoder->drc->present)
{
if (!hDecoder->drc->exclude_mask[cpe->channel] || !hDecoder->drc->excluded_chns_present)
drc_decode(hDecoder->drc, spec_coef1);
if (!hDecoder->drc->exclude_mask[cpe->paired_channel] || !hDecoder->drc->excluded_chns_present)
drc_decode(hDecoder->drc, spec_coef2);
}
/* filter bank */
#ifdef SSR_DEC
if (hDecoder->object_type != SSR)
{
#endif
ifilter_bank(hDecoder->fb, ics1->window_sequence, ics1->window_shape,
hDecoder->window_shape_prev[cpe->channel], spec_coef1,
hDecoder->time_out[cpe->channel], hDecoder->fb_intermed[cpe->channel],
hDecoder->object_type, hDecoder->frameLength);
ifilter_bank(hDecoder->fb, ics2->window_sequence, ics2->window_shape,
hDecoder->window_shape_prev[cpe->paired_channel], spec_coef2,
hDecoder->time_out[cpe->paired_channel], hDecoder->fb_intermed[cpe->paired_channel],
hDecoder->object_type, hDecoder->frameLength);
#ifdef SSR_DEC
} else {
ssr_decode(&(ics1->ssr), hDecoder->fb, ics1->window_sequence, ics1->window_shape,
hDecoder->window_shape_prev[cpe->channel], spec_coef1, hDecoder->time_out[cpe->channel],
hDecoder->ssr_overlap[cpe->channel], hDecoder->ipqf_buffer[cpe->channel],
hDecoder->prev_fmd[cpe->channel], hDecoder->frameLength);
ssr_decode(&(ics2->ssr), hDecoder->fb, ics2->window_sequence, ics2->window_shape,
hDecoder->window_shape_prev[cpe->paired_channel], spec_coef2, hDecoder->time_out[cpe->paired_channel],
hDecoder->ssr_overlap[cpe->paired_channel], hDecoder->ipqf_buffer[cpe->paired_channel],
hDecoder->prev_fmd[cpe->paired_channel], hDecoder->frameLength);
}
#endif
/* save window shape for next frame */
hDecoder->window_shape_prev[cpe->channel] = ics1->window_shape;
hDecoder->window_shape_prev[cpe->paired_channel] = ics2->window_shape;
#ifdef LTP_DEC
if (is_ltp_ot(hDecoder->object_type))
{
lt_update_state(hDecoder->lt_pred_stat[cpe->channel], hDecoder->time_out[cpe->channel],
hDecoder->fb_intermed[cpe->channel], hDecoder->frameLength, hDecoder->object_type);
lt_update_state(hDecoder->lt_pred_stat[cpe->paired_channel], hDecoder->time_out[cpe->paired_channel],
hDecoder->fb_intermed[cpe->paired_channel], hDecoder->frameLength, hDecoder->object_type);
}
#endif
#ifdef SBR_DEC
if (((hDecoder->sbr_present_flag == 1) || (hDecoder->forceUpSampling == 1))
&& hDecoder->sbr_alloced[hDecoder->fr_ch_ele])
{
int ele = hDecoder->fr_ch_ele;
int ch0 = cpe->channel;
int ch1 = cpe->paired_channel;
/* following case can happen when forceUpSampling == 1 */
if (hDecoder->sbr[ele] == NULL)
{
hDecoder->sbr[ele] = sbrDecodeInit(hDecoder->frameLength,
hDecoder->element_id[ele], 2*get_sample_rate(hDecoder->sf_index),
hDecoder->downSampledSBR
#ifdef DRM
, 0
#endif
);
}
if (cpe->ics1.window_sequence == EIGHT_SHORT_SEQUENCE)
hDecoder->sbr[ele]->maxAACLine = 8*min(cpe->ics1.swb_offset[max(cpe->ics1.max_sfb-1, 0)], cpe->ics1.swb_offset_max);
else
hDecoder->sbr[ele]->maxAACLine = min(cpe->ics1.swb_offset[max(cpe->ics1.max_sfb-1, 0)], cpe->ics1.swb_offset_max);
retval = sbrDecodeCoupleFrame(hDecoder->sbr[ele],
hDecoder->time_out[ch0], hDecoder->time_out[ch1],
hDecoder->postSeekResetFlag, hDecoder->downSampledSBR);
if (retval > 0)
return retval;
} else if (((hDecoder->sbr_present_flag == 1) || (hDecoder->forceUpSampling == 1))
&& !hDecoder->sbr_alloced[hDecoder->fr_ch_ele])
{
return 23;
}
#endif
return 0;
}