REminiscence/mixer.h

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/*
* REminiscence - Flashback interpreter
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* Copyright (C) 2005-2019 Gregory Montoir (cyx@users.sourceforge.net)
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*/
#ifndef MIXER_H__
#define MIXER_H__
#include "intern.h"
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#include "cpc_player.h"
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#include "mod_player.h"
#include "ogg_player.h"
#include "sfx_player.h"
struct MixerChunk {
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const uint8_t *data;
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uint32_t len;
MixerChunk()
: data(0), len(0) {
}
int8_t getPCM(int offset) const {
if (offset < 0) {
offset = 0;
} else if (offset >= (int)len) {
offset = len - 1;
}
return (int8_t)data[offset];
}
};
struct MixerChannel {
uint8_t active;
uint8_t volume;
MixerChunk chunk;
uint32_t chunkPos;
uint32_t chunkInc;
};
struct FileSystem;
struct SystemStub;
struct Mixer {
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typedef bool (*PremixHook)(void *userData, int16_t *buf, int len);
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enum MusicType {
MT_NONE,
MT_MOD,
MT_OGG,
MT_SFX,
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MT_CPC,
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};
enum {
MUSIC_TRACK = 1000,
NUM_CHANNELS = 4,
FRAC_BITS = 12,
MAX_VOLUME = 64
};
FileSystem *_fs;
SystemStub *_stub;
MixerChannel _channels[NUM_CHANNELS];
PremixHook _premixHook;
void *_premixHookData;
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MusicType _backgroundMusicType;
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MusicType _musicType;
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CpcPlayer _cpc;
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ModPlayer _mod;
OggPlayer _ogg;
SfxPlayer _sfx;
int _musicTrack;
Mixer(FileSystem *fs, SystemStub *stub);
void init();
void free();
void setPremixHook(PremixHook premixHook, void *userData);
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void play(const uint8_t *data, uint32_t len, uint16_t freq, uint8_t volume);
bool isPlaying(const uint8_t *data) const;
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uint32_t getSampleRate() const;
void stopAll();
void playMusic(int num);
void stopMusic();
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void mix(int16_t *buf, int len);
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static void mixCallback(void *param, int16_t *buf, int len);
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};
#endif // MIXER_H__