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/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
This file is part of Quake III Arena source code.
Quake III Arena source code 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.
Quake III Arena source code 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 Quake III Arena source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
// snd_local.h -- private sound definations
#include "../qcommon/q_shared.h"
#include "../qcommon/qcommon.h"
#include "snd_public.h"
#define PAINTBUFFER_SIZE 4096 // this is in samples
#define SND_CHUNK_SIZE 1024 // samples
#define SND_CHUNK_SIZE_FLOAT (SND_CHUNK_SIZE/2) // floats
#define SND_CHUNK_SIZE_BYTE (SND_CHUNK_SIZE*2) // floats
typedef struct {
int left; // the final values will be clamped to +/- 0x00ffff00 and shifted down
int right;
} portable_samplepair_t;
typedef struct adpcm_state {
short sample; /* Previous output value */
char index; /* Index into stepsize table */
} adpcm_state_t;
typedef struct sndBuffer_s {
short sndChunk[SND_CHUNK_SIZE];
struct sndBuffer_s *next;
int size;
adpcm_state_t adpcm;
} sndBuffer;
typedef struct sfx_s {
sndBuffer *soundData;
qboolean defaultSound; // couldn't be loaded, so use buzz
qboolean inMemory; // not in Memory
qboolean soundCompressed; // not in Memory
int soundCompressionMethod;
int soundLength;
char soundName[MAX_QPATH];
int lastTimeUsed;
struct sfx_s *next;
} sfx_t;
typedef struct {
int channels;
int samples; // mono samples in buffer
int submission_chunk; // don't mix less than this #
int samplebits;
int speed;
byte *buffer;
} dma_t;
#define START_SAMPLE_IMMEDIATE 0x7fffffff
#define MAX_DOPPLER_SCALE 50.0f //arbitrary
typedef struct loopSound_s {
vec3_t origin;
vec3_t velocity;
sfx_t *sfx;
int mergeFrame;
qboolean active;
qboolean kill;
qboolean doppler;
float dopplerScale;
float oldDopplerScale;
int framenum;
} loopSound_t;
typedef struct
{
int allocTime;
int startSample; // START_SAMPLE_IMMEDIATE = set immediately on next mix
int entnum; // to allow overriding a specific sound
int entchannel; // to allow overriding a specific sound
int leftvol; // 0-255 volume after spatialization
int rightvol; // 0-255 volume after spatialization
int master_vol; // 0-255 volume before spatialization
float dopplerScale;
float oldDopplerScale;
vec3_t origin; // only use if fixed_origin is set
qboolean fixed_origin; // use origin instead of fetching entnum's origin
sfx_t *thesfx; // sfx structure
qboolean doppler;
} channel_t;
#define WAV_FORMAT_PCM 1
typedef struct {
int format;
int rate;
int width;
int channels;
int samples;
int dataofs; // chunk starts this many bytes from file start
} wavinfo_t;
/*
====================================================================
SYSTEM SPECIFIC FUNCTIONS
====================================================================
*/
// initializes cycling through a DMA buffer and returns information on it
qboolean SNDDMA_Init(void);
// gets the current DMA position
int SNDDMA_GetDMAPos(void);
// shutdown the DMA xfer.
void SNDDMA_Shutdown(void);
void SNDDMA_BeginPainting (void);
void SNDDMA_Submit(void);
//====================================================================
#define MAX_CHANNELS 96
extern channel_t s_channels[MAX_CHANNELS];
extern channel_t loop_channels[MAX_CHANNELS];
extern int numLoopChannels;
extern int s_paintedtime;
extern int s_rawend;
extern vec3_t listener_forward;
extern vec3_t listener_right;
extern vec3_t listener_up;
extern dma_t dma;
#define MAX_RAW_SAMPLES 16384
extern portable_samplepair_t s_rawsamples[MAX_RAW_SAMPLES];
extern cvar_t *s_volume;
extern cvar_t *s_nosound;
extern cvar_t *s_khz;
extern cvar_t *s_show;
extern cvar_t *s_mixahead;
extern cvar_t *s_testsound;
extern cvar_t *s_separation;
qboolean S_LoadSound( sfx_t *sfx );
void SND_free(sndBuffer *v);
sndBuffer* SND_malloc( void );
void SND_setup( void );
void S_PaintChannels(int endtime);
void S_memoryLoad(sfx_t *sfx);
portable_samplepair_t *S_GetRawSamplePointer( void );
// spatializes a channel
void S_Spatialize(channel_t *ch);
// adpcm functions
int S_AdpcmMemoryNeeded( const wavinfo_t *info );
void S_AdpcmEncodeSound( sfx_t *sfx, short *samples );
void S_AdpcmGetSamples(sndBuffer *chunk, short *to);
// wavelet function
#define SENTINEL_MULAW_ZERO_RUN 127
#define SENTINEL_MULAW_FOUR_BIT_RUN 126
void S_FreeOldestSound( void );
#define NXStream byte
void encodeWavelet(sfx_t *sfx, short *packets);
void decodeWavelet( sndBuffer *stream, short *packets);
void encodeMuLaw( sfx_t *sfx, short *packets);
extern short mulawToShort[256];
extern short *sfxScratchBuffer;
extern sfx_t *sfxScratchPointer;
extern int sfxScratchIndex;
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