95 lines
1.7 KiB
C
95 lines
1.7 KiB
C
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/*
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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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*/
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#ifndef MIXER_H__
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#define MIXER_H__
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#include "intern.h"
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#include "cpc_player.h"
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#include "mod_player.h"
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#include "ogg_player.h"
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#include "prf_player.h"
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#include "sfx_player.h"
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struct MixerChunk {
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const uint8_t *data;
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uint32_t len;
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MixerChunk()
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: data(0), len(0) {
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}
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int8_t getPCM(int offset) const {
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if (offset < 0) {
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offset = 0;
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} else if (offset >= (int)len) {
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offset = len - 1;
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}
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return (int8_t)data[offset];
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}
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};
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struct MixerChannel {
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uint8_t active;
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uint8_t volume;
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MixerChunk chunk;
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uint32_t chunkPos;
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uint32_t chunkInc;
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};
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struct FileSystem;
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struct SystemStub;
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struct Mixer {
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typedef bool (*PremixHook)(void *userData, int16_t *buf, int len);
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enum MusicType {
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MT_NONE,
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MT_MOD,
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MT_OGG,
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MT_PRF,
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MT_SFX,
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MT_CPC,
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};
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enum {
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MUSIC_TRACK = 1000,
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NUM_CHANNELS = 4,
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FRAC_BITS = 12,
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MAX_VOLUME = 64
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};
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FileSystem *_fs;
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SystemStub *_stub;
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MixerChannel _channels[NUM_CHANNELS];
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PremixHook _premixHook;
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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;
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OggPlayer _ogg;
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PrfPlayer _prf;
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SfxPlayer _sfx;
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int _musicTrack;
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Mixer(FileSystem *fs, SystemStub *stub, int midiDriver);
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void init();
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void free();
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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);
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bool isPlaying(const uint8_t *data) const;
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uint32_t getSampleRate() const;
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void stopAll();
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void playMusic(int num, int tempo = 0);
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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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};
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#endif // MIXER_H__
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