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Banjo Kazooie
2022-07-15 17:09:41 -05:00
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include/synthInternals.h Executable file
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/*====================================================================
* audioInternals.h
*
* Synopsis:
*
* Copyright 1993, Silicon Graphics, Inc.
* All Rights Reserved.
*
* This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics,
* Inc.; the contents of this file may not be disclosed to third
* parties, copied or duplicated in any form, in whole or in part,
* without the prior written permission of Silicon Graphics, Inc.
*
* RESTRICTED RIGHTS LEGEND:
* Use, duplication or disclosure by the Government is subject to
* restrictions as set forth in subdivision (c)(1)(ii) of the Rights
* in Technical Data and Computer Software clause at DFARS
* 252.227-7013, and/or in similar or successor clauses in the FAR,
* DOD or NASA FAR Supplement. Unpublished - rights reserved under the
* Copyright Laws of the United States.
*====================================================================*/
#ifndef __audioInternals__
#define __audioInternals__
#include <libaudio.h>
/*
* filter message ids
*/
enum {
AL_FILTER_FREE_VOICE,
AL_FILTER_SET_SOURCE,
AL_FILTER_ADD_SOURCE,
AL_FILTER_ADD_UPDATE,
AL_FILTER_RESET,
AL_FILTER_SET_WAVETABLE,
/* AL_FILTER_SET_DMA_PROC,*/
/* AL_FILTER_SKIP_LOOP,*/
AL_FILTER_SET_DRAM,
AL_FILTER_SET_PITCH,
AL_FILTER_SET_UNITY_PITCH,
AL_FILTER_START,
/* AL_FILTER_SET_DECAY,*/
/* AL_FILTER_SET_FC,*/
AL_FILTER_SET_STATE,
AL_FILTER_SET_VOLUME,
AL_FILTER_SET_PAN,
AL_FILTER_START_VOICE_ALT,
AL_FILTER_START_VOICE,
AL_FILTER_STOP_VOICE,
AL_FILTER_SET_FXAMT
};
#define AL_MAX_RSP_SAMPLES 160
/*
* buffer locations based on AL_MAX_RSP_SAMPLES
*/
#define AL_DECODER_IN 0
#define AL_RESAMPLER_OUT 0
#define AL_TEMP_0 0
#define AL_DECODER_OUT 320
#define AL_TEMP_1 320
#define AL_TEMP_2 640
#define AL_MAIN_L_OUT 1088
#define AL_MAIN_R_OUT 1408
#define AL_AUX_L_OUT 1728
#define AL_AUX_R_OUT 2048
/*
* filter types
*/
enum {
AL_ADPCM,
AL_RESAMPLE,
AL_BUFFER,
AL_SAVE,
AL_ENVMIX,
AL_FX,
AL_AUXBUS,
AL_MAINBUS
};
typedef struct ALParam_s {
struct ALParam_s *next;
s32 delta;
s16 type;
union {
f32 f;
s32 i;
} data;
union {
f32 f;
s32 i;
} moredata;
union {
f32 f;
s32 i;
} stillmoredata;
union {
f32 f;
s32 i;
} yetstillmoredata;
} ALParam;
typedef struct {
struct ALParam_s *next;
s32 delta;
s16 type;
s16 unity; /* disable resampler */
f32 pitch;
s16 volume;
ALPan pan;
u8 fxMix;
s32 samples;
struct ALWaveTable_s *wave;
} ALStartParamAlt;
typedef struct {
struct ALParam_s *next;
s32 delta;
s16 type;
s16 unity; /* disable resampler */
struct ALWaveTable_s *wave;
} ALStartParam;
typedef struct {
struct ALParam_s *next;
s32 delta;
s16 type;
struct PVoice_s *pvoice;
} ALFreeParam;
typedef Acmd *(*ALCmdHandler)(void *, s16 *, s32, s32, Acmd *);
typedef s32 (*ALSetParam)(void *, s32, void *);
typedef struct ALFilter_s {
struct ALFilter_s *source;
ALCmdHandler handler;
ALSetParam setParam;
s16 inp;
s16 outp;
s32 type;
} ALFilter;
void alFilterNew(ALFilter *f, ALCmdHandler h, ALSetParam s, s32 type);
#define AL_MAX_ADPCM_STATES 3 /* Depends on number of subframes
* per frame and loop length
*/
typedef struct {
ALFilter filter;
ADPCM_STATE *state;
ADPCM_STATE *lstate;
ALRawLoop loop;
struct ALWaveTable_s *table;
s32 bookSize;
ALDMAproc dma;
void *dmaState;
s32 sample;
s32 lastsam;
s32 first;
s32 memin;
} ALLoadFilter;
void alLoadNew(ALLoadFilter *f, ALDMANew dma, ALHeap *hp);
Acmd *alAdpcmPull(void *f, s16 *outp, s32 byteCount, s32 sampleOffset, Acmd *p);
Acmd *alRaw16Pull(void *f, s16 *outp, s32 byteCount, s32 sampleOffset, Acmd *p);
s32 alLoadParam(void *filter, s32 paramID, void *param);
typedef struct ALResampler_s {
ALFilter filter;
RESAMPLE_STATE *state;
f32 ratio;
s32 upitch;
f32 delta;
s32 first;
ALParam *ctrlList;
ALParam *ctrlTail;
s32 motion;
} ALResampler;
typedef struct {
s16 fc;
s16 fgain;
union {
s16 fccoef[16];
s64 force_aligned;
} fcvec;
POLEF_STATE *fstate;
s32 first;
} ALLowPass;
typedef struct {
u32 input;
u32 output;
s16 ffcoef;
s16 fbcoef;
s16 gain;
f32 rsinc;
f32 rsval;
s32 rsdelta;
f32 rsgain;
ALLowPass *lp;
ALResampler *rs;
} ALDelay;
typedef s32 (*ALSetFXParam)(void *, s32, void *);
typedef struct {
struct ALFilter_s filter;
s16 *base;
s16 *input;
u32 length;
ALDelay *delay;
u8 section_count;
ALSetFXParam paramHdl;
} ALFx;
void alFxNew(ALFx *r, ALSynConfig *c, ALHeap *hp);
Acmd *alFxPull(void *f, s16 *outp, s32 out, s32 sampleOffset, Acmd *p);
s32 alFxParam(void *filter, s32 paramID, void *param);
s32 alFxParamHdl(void *filter, s32 paramID, void *param);
#define AL_MAX_MAIN_BUS_SOURCES 1
typedef struct ALMainBus_s {
ALFilter filter;
s32 sourceCount;
s32 maxSources;
ALFilter **sources;
} ALMainBus;
void alMainBusNew(ALMainBus *m, void *ptr, s32 len);
Acmd *alMainBusPull(void *f, s16 *outp, s32 outCount, s32 sampleOffset, Acmd *p);
s32 alMainBusParam(void *filter, s32 paramID, void *param);
#define AL_MAX_AUX_BUS_SOURCES 8
#define AL_MAX_AUX_BUS_FX 1
typedef struct ALAuxBus_s {
ALFilter filter;
s32 sourceCount;
s32 maxSources;
ALFilter **sources;
ALFx fx[AL_MAX_AUX_BUS_FX];
} ALAuxBus;
void alAuxBusNew(ALAuxBus *m, void *ptr, s32 len);
Acmd *alAuxBusPull(void *f, s16 *outp, s32 outCount, s32 sampleOffset, Acmd *p);
s32 alAuxBusParam(void *filter, s32 paramID, void *param);
void alResampleNew(ALResampler *r, ALHeap *hp);
Acmd *alResamplePull(void *f, s16 *outp, s32 out, s32 sampleOffset, Acmd *p);
s32 alResampleParam(void *f, s32 paramID, void *param);
typedef struct ALSave_s {
ALFilter filter;
s32 dramout;
s32 first;
} ALSave;
void alSaveNew(ALSave *r);
Acmd *alSavePull(void *f, s16 *outp, s32 outCount, s32 sampleOffset, Acmd *p);
s32 alSaveParam(void *f, s32 paramID, void *param);
typedef struct ALEnvMixer_s {
ALFilter filter;
ENVMIX_STATE *state;
s16 pan;
s16 volume;
s16 cvolL;
s16 cvolR;
s16 dryamt;
s16 wetamt;
u16 lratl;
s16 lratm;
s16 ltgt;
u16 rratl;
s16 rratm;
s16 rtgt;
s32 delta;
s32 segEnd;
s32 first;
ALParam *ctrlList;
ALParam *ctrlTail;
ALFilter **sources;
s32 motion;
} ALEnvMixer;
void alEnvmixerNew(ALEnvMixer *e, ALHeap *hp);
Acmd *alEnvmixerPull(void *f, s16 *outp, s32 out, s32 sampleOffset, Acmd *p);
s32 alEnvmixerParam(void *filter, s32 paramID, void *param);
/*
* heap stuff
*/
typedef struct {
s32 magic; /* check structure integrety */
s32 size; /* size of this allocated block */
u8 *file; /* file that this alloc was called from */
s32 line; /* line that it was called from */
s32 count; /* heap call number */
s32 pad0;
s32 pad1;
s32 pad2; /* Make it 32 bytes */
} HeapInfo;
#define AL_CACHE_ALIGN 15
/*
* synth stuff
*/
typedef struct PVoice_s {
ALLink node;
struct ALVoice_s *vvoice;
ALFilter *channelKnob;
ALLoadFilter decoder;
ALResampler resampler;
ALEnvMixer envmixer;
s32 offset;
} PVoice;
/*
* prototypes for private driver functions
*/
ALParam *__allocParam(void);
void __freeParam(ALParam *param);
void _freePVoice(ALSynth *drvr, PVoice *pvoice);
void _collectPVoices(ALSynth *drvr);
s32 _timeToSamples(ALSynth *drvr, s32 micros);
ALMicroTime _samplesToTime(ALSynth *synth, s32 samples);
#endif