129 lines
4.9 KiB
C
129 lines
4.9 KiB
C
#ifndef AL_MIDI_BASE_H
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#define AL_MIDI_BASE_H
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#include "alMain.h"
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#include "atomic.h"
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#include "evtqueue.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct ALsoundfont;
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typedef size_t (*ReaderCb)(void *ptr, size_t size, void *stream);
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typedef struct Reader {
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ReaderCb cb;
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void *ptr;
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int error;
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} Reader;
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#define READ(x_, buf_, len_) ((x_)->cb((buf_), (len_), (x_)->ptr))
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#define READERR(x_) ((x_)->error)
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ALboolean loadSf2(Reader *stream, struct ALsoundfont *sfont, ALCcontext *context);
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#define MIDI_CLOCK_RES U64(1000000000)
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struct MidiSynthVtable;
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typedef struct MidiSynth {
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EvtQueue EventQueue;
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ALuint64 ClockBase;
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ALuint SamplesDone;
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ALuint SampleRate;
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/* NOTE: This rwlock is for the state and soundfont. The EventQueue and
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* related must instead use the device lock as they're used in the mixer
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* thread.
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*/
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RWLock Lock;
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struct ALsoundfont **Soundfonts;
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ALsizei NumSoundfonts;
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volatile ALfloat Gain;
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volatile ALenum State;
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const struct MidiSynthVtable *vtbl;
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} MidiSynth;
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void MidiSynth_Construct(MidiSynth *self, ALCdevice *device);
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void MidiSynth_Destruct(MidiSynth *self);
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ALenum MidiSynth_selectSoundfonts(MidiSynth *self, ALCcontext *context, ALsizei count, const ALuint *ids);
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inline void MidiSynth_setGain(MidiSynth *self, ALfloat gain) { self->Gain = gain; }
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inline ALfloat MidiSynth_getGain(const MidiSynth *self) { return self->Gain; }
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inline void MidiSynth_setState(MidiSynth *self, ALenum state) { ExchangeInt(&self->State, state); }
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inline ALenum MidiSynth_getState(const MidiSynth *self) { return self->State; }
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void MidiSynth_stop(MidiSynth *self);
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inline void MidiSynth_reset(MidiSynth *self) { MidiSynth_stop(self); }
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inline ALuint64 MidiSynth_getTime(const MidiSynth *self)
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{ return self->ClockBase + (self->SamplesDone*MIDI_CLOCK_RES/self->SampleRate); }
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inline ALuint64 MidiSynth_getNextEvtTime(const MidiSynth *self)
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{
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if(self->EventQueue.pos == self->EventQueue.size)
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return UINT64_MAX;
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return self->EventQueue.events[self->EventQueue.pos].time;
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}
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void MidiSynth_setSampleRate(MidiSynth *self, ALuint srate);
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inline void MidiSynth_update(MidiSynth *self, ALCdevice *device)
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{ MidiSynth_setSampleRate(self, device->Frequency); }
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ALenum MidiSynth_insertEvent(MidiSynth *self, ALuint64 time, ALuint event, ALsizei param1, ALsizei param2);
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ALenum MidiSynth_insertSysExEvent(MidiSynth *self, ALuint64 time, const ALbyte *data, ALsizei size);
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struct MidiSynthVtable {
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void (*const Destruct)(MidiSynth *self);
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ALenum (*const selectSoundfonts)(MidiSynth *self, ALCcontext *context, ALsizei count, const ALuint *ids);
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void (*const setGain)(MidiSynth *self, ALfloat gain);
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void (*const stop)(MidiSynth *self);
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void (*const reset)(MidiSynth *self);
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void (*const update)(MidiSynth *self, ALCdevice *device);
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void (*const process)(MidiSynth *self, ALuint samples, ALfloat (*restrict DryBuffer)[BUFFERSIZE]);
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void (*const Delete)(void *ptr);
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};
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#define DEFINE_MIDISYNTH_VTABLE(T) \
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DECLARE_THUNK(T, MidiSynth, void, Destruct) \
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DECLARE_THUNK3(T, MidiSynth, ALenum, selectSoundfonts, ALCcontext*, ALsizei, const ALuint*) \
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DECLARE_THUNK1(T, MidiSynth, void, setGain, ALfloat) \
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DECLARE_THUNK(T, MidiSynth, void, stop) \
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DECLARE_THUNK(T, MidiSynth, void, reset) \
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DECLARE_THUNK1(T, MidiSynth, void, update, ALCdevice*) \
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DECLARE_THUNK2(T, MidiSynth, void, process, ALuint, ALfloatBUFFERSIZE*restrict) \
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static void T##_MidiSynth_Delete(void *ptr) \
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{ T##_Delete(STATIC_UPCAST(T, MidiSynth, (MidiSynth*)ptr)); } \
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\
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static const struct MidiSynthVtable T##_MidiSynth_vtable = { \
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T##_MidiSynth_Destruct, \
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\
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T##_MidiSynth_selectSoundfonts, \
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T##_MidiSynth_setGain, \
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T##_MidiSynth_stop, \
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T##_MidiSynth_reset, \
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T##_MidiSynth_update, \
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T##_MidiSynth_process, \
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\
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T##_MidiSynth_Delete, \
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}
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MidiSynth *SSynth_create(ALCdevice *device);
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MidiSynth *FSynth_create(ALCdevice *device);
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MidiSynth *DSynth_create(ALCdevice *device);
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MidiSynth *SynthCreate(ALCdevice *device);
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#ifdef __cplusplus
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}
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#endif
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#endif /* AL_MIDI_BASE_H */
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