ref: d7f038fe0566c8239ec0b2ca1e56686476e82e09
dir: /src/audiolib/_multivc.h/
/*
Copyright (C) 1994-1995 Apogee Software, Ltd.
Copyright (C) 2002-2015 icculus.org, GNU/Linux port
Copyright (C) 2017-2018 Steven LeVesque
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.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/**********************************************************************
file: _MULTIVC.H
author: James R. Dose
date: December 20, 1993
Private header for MULTIVOC.C
(c) Copyright 1993 James R. Dose. All Rights Reserved.
**********************************************************************/
#ifndef ___MULTIVC_H
#define ___MULTIVC_H
#define TRUE ( 1 == 1 )
#define FALSE ( !TRUE )
#define VOC_8BIT 0x0
#define VOC_CT4_ADPCM 0x1
#define VOC_CT3_ADPCM 0x2
#define VOC_CT2_ADPCM 0x3
#define VOC_16BIT 0x4
#define VOC_ALAW 0x6
#define VOC_MULAW 0x7
#define VOC_CREATIVE_ADPCM 0x200
#define T_SIXTEENBIT_STEREO 0
#define T_8BITS 1
#define T_MONO 2
#define T_16BITSOURCE 4
#define T_LEFTQUIET 8
#define T_RIGHTQUIET 16
#define T_DEFAULT T_SIXTEENBIT_STEREO
#define MV_MaxPanPosition 31
#define MV_NumPanPositions ( MV_MaxPanPosition + 1 )
#define MV_MaxTotalVolume 255
//#define MV_MaxVolume 63
#define MV_NumVoices 8
#define MIX_VOLUME( volume ) \
( ( max( 0, min( ( volume ), 255 ) ) * ( MV_MaxVolume + 1 ) ) >> 8 )
// ( ( max( 0, min( ( volume ), 255 ) ) ) >> 2 )
//#define SILENCE_16BIT 0x80008000
#define SILENCE_16BIT 0
#define SILENCE_8BIT 0x80808080
//#define SILENCE_16BIT_PAS 0
#define MixBufferSize 256
#define NumberOfBuffers 16
#define TotalBufferSize ( MixBufferSize * NumberOfBuffers )
#ifdef __plan9__
#undef PI
#define PI 3.1415926536
#endif
typedef enum
{
Raw,
VOC,
DemandFeed,
WAV
} wavedata;
typedef enum
{
NoMoreData,
KeepPlaying
} playbackstatus;
typedef struct VoiceNode
{
struct VoiceNode *next;
struct VoiceNode *prev;
wavedata wavetype;
char bits;
playbackstatus ( *GetSound )( struct VoiceNode *voice );
void ( *mix )( unsigned long position, unsigned long rate,
const char *start, unsigned long length );
char *NextBlock;
char *LoopStart;
char *LoopEnd;
unsigned LoopCount;
unsigned long LoopSize;
unsigned long BlockLength;
unsigned long PitchScale;
unsigned long FixedPointBufferSize;
char *sound;
unsigned long length;
unsigned long SamplingRate;
unsigned long RateScale;
unsigned long position;
int Playing;
int handle;
int priority;
void ( *DemandFeed )( char **ptr, unsigned long *length );
short *LeftVolume;
short *RightVolume;
unsigned long callbackval;
} VoiceNode;
typedef struct
{
VoiceNode *start;
VoiceNode *end;
} VList;
typedef struct
{
unsigned char left;
unsigned char right;
} Pan;
typedef signed short MONO16;
typedef signed char MONO8;
typedef struct
{
MONO16 left;
MONO16 right;
// unsigned short left;
// unsigned short right;
} STEREO16;
typedef struct
{
MONO16 left;
MONO16 right;
} SIGNEDSTEREO16;
typedef struct
{
// MONO8 left;
// MONO8 right;
char left;
char right;
} STEREO8;
typedef struct
{
char RIFF[ 4 ];
unsigned long file_size;
char WAVE[ 4 ];
char fmt[ 4 ];
unsigned long format_size;
} riff_header;
typedef struct
{
unsigned short wFormatTag;
unsigned short nChannels;
unsigned long nSamplesPerSec;
unsigned long nAvgBytesPerSec;
unsigned short nBlockAlign;
unsigned short nBitsPerSample;
} format_header;
typedef struct
{
unsigned char DATA[ 4 ];
unsigned long size;
} data_header;
typedef MONO8 VOLUME8[ 256 ];
typedef MONO16 VOLUME16[ 256 ];
typedef char HARSH_CLIP_TABLE_8[ MV_NumVoices * 256 ];
static void MV_Mix( VoiceNode *voice, int buffer );
static void MV_PlayVoice( VoiceNode *voice );
static void MV_StopVoice( VoiceNode *voice );
static void MV_ServiceVoc( void );
static playbackstatus MV_GetNextVOCBlock( VoiceNode *voice );
static playbackstatus MV_GetNextDemandFeedBlock( VoiceNode *voice );
static playbackstatus MV_GetNextRawBlock( VoiceNode *voice );
static playbackstatus MV_GetNextWAVBlock( VoiceNode *voice );
static void MV_ServiceRecord( void );
static VoiceNode *MV_GetVoice( int handle );
static VoiceNode *MV_AllocVoice( int priority );
static short *MV_GetVolumeTable( int vol );
static void MV_SetVoiceMixMode( VoiceNode *voice );
static void MV_SetVoicePitch( VoiceNode *voice, unsigned long rate, int pitchoffset );
static void MV_CalcVolume( int MaxLevel );
static void MV_CalcPanTable( void );
void ClearBuffer_DW( void *ptr, unsigned data, int length );
void MV_Mix8BitMono( unsigned long position, unsigned long rate,
const char *start, unsigned long length );
void MV_Mix8BitStereo( unsigned long position,
unsigned long rate, const char *start, unsigned long length );
void MV_Mix16BitMono( unsigned long position,
unsigned long rate, const char *start, unsigned long length );
void MV_Mix16BitStereo( unsigned long position,
unsigned long rate, const char *start, unsigned long length );
void MV_Mix16BitMono16( unsigned long position,
unsigned long rate, const char *start, unsigned long length );
void MV_Mix8BitMono16( unsigned long position, unsigned long rate,
const char *start, unsigned long length );
void MV_Mix8BitStereo16( unsigned long position,
unsigned long rate, const char *start, unsigned long length );
void MV_Mix16BitStereo16( unsigned long position,
unsigned long rate, const char *start, unsigned long length );
void MV_16BitReverb( const char *src, char *dest, const VOLUME16 *volume, int count );
void MV_8BitReverb( const signed char *src, signed char *dest, const VOLUME16 *volume, int count );
void MV_16BitReverbFast( const char *src, char *dest, int count, int shift );
void MV_8BitReverbFast( const signed char *src, signed char *dest, int count, int shift );
#endif