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#ifndef AL_MIDI_BASE_H
#define AL_MIDI_BASE_H
#include "alMain.h"
#include "atomic.h"
#include "evtqueue.h"
#ifdef __cplusplus
extern "C" {
#endif
struct ALsoundfont;
typedef size_t (*ReaderCb)(void *ptr, size_t size, void *stream);
typedef struct Reader {
ReaderCb cb;
void *ptr;
int error;
} Reader;
inline size_t Reader_read(Reader *self, void *buf, size_t len)
{
size_t got = (!self->error) ? self->cb(buf, len, self->ptr) : 0;
if(got < len) self->error = 1;
return got;
}
#define READERR(x_) ((x_)->error)
ALboolean loadSf2(Reader *stream, struct ALsoundfont *sfont, ALCcontext *context);
#define MIDI_CLOCK_RES U64(1000000000)
struct MidiSynthVtable;
typedef struct MidiSynth {
EvtQueue EventQueue;
ALuint64 ClockBase;
ALuint SamplesDone;
ALuint SampleRate;
/* NOTE: This rwlock is for the state and soundfont. The EventQueue and
* related must instead use the device lock as they're used in the mixer
* thread.
*/
RWLock Lock;
struct ALsoundfont **Soundfonts;
ALsizei NumSoundfonts;
volatile ALfloat Gain;
volatile ALenum State;
const struct MidiSynthVtable *vtbl;
} MidiSynth;
void MidiSynth_Construct(MidiSynth *self, ALCdevice *device);
void MidiSynth_Destruct(MidiSynth *self);
ALenum MidiSynth_selectSoundfonts(MidiSynth *self, ALCcontext *context, ALsizei count, const ALuint *ids);
inline void MidiSynth_setGain(MidiSynth *self, ALfloat gain) { self->Gain = gain; }
inline ALfloat MidiSynth_getGain(const MidiSynth *self) { return self->Gain; }
inline void MidiSynth_setState(MidiSynth *self, ALenum state) { ExchangeInt(&self->State, state); }
inline ALenum MidiSynth_getState(const MidiSynth *self) { return self->State; }
void MidiSynth_stop(MidiSynth *self);
inline void MidiSynth_reset(MidiSynth *self) { MidiSynth_stop(self); }
inline ALuint64 MidiSynth_getTime(const MidiSynth *self)
{ return self->ClockBase + (self->SamplesDone*MIDI_CLOCK_RES/self->SampleRate); }
inline ALuint64 MidiSynth_getNextEvtTime(const MidiSynth *self)
{
if(self->EventQueue.pos == self->EventQueue.size)
return UINT64_MAX;
return self->EventQueue.events[self->EventQueue.pos].time;
}
void MidiSynth_setSampleRate(MidiSynth *self, ALuint srate);
inline void MidiSynth_update(MidiSynth *self, ALCdevice *device)
{ MidiSynth_setSampleRate(self, device->Frequency); }
ALenum MidiSynth_insertEvent(MidiSynth *self, ALuint64 time, ALuint event, ALsizei param1, ALsizei param2);
ALenum MidiSynth_insertSysExEvent(MidiSynth *self, ALuint64 time, const ALbyte *data, ALsizei size);
struct MidiSynthVtable {
void (*const Destruct)(MidiSynth *self);
ALenum (*const selectSoundfonts)(MidiSynth *self, ALCcontext *context, ALsizei count, const ALuint *ids);
void (*const setGain)(MidiSynth *self, ALfloat gain);
void (*const stop)(MidiSynth *self);
void (*const reset)(MidiSynth *self);
void (*const update)(MidiSynth *self, ALCdevice *device);
void (*const process)(MidiSynth *self, ALuint samples, ALfloat (*restrict DryBuffer)[BUFFERSIZE]);
void (*const Delete)(void *ptr);
};
#define DEFINE_MIDISYNTH_VTABLE(T) \
DECLARE_THUNK(T, MidiSynth, void, Destruct) \
DECLARE_THUNK3(T, MidiSynth, ALenum, selectSoundfonts, ALCcontext*, ALsizei, const ALuint*) \
DECLARE_THUNK1(T, MidiSynth, void, setGain, ALfloat) \
DECLARE_THUNK(T, MidiSynth, void, stop) \
DECLARE_THUNK(T, MidiSynth, void, reset) \
DECLARE_THUNK1(T, MidiSynth, void, update, ALCdevice*) \
DECLARE_THUNK2(T, MidiSynth, void, process, ALuint, ALfloatBUFFERSIZE*restrict) \
static void T##_MidiSynth_Delete(void *ptr) \
{ T##_Delete(STATIC_UPCAST(T, MidiSynth, (MidiSynth*)ptr)); } \
\
static const struct MidiSynthVtable T##_MidiSynth_vtable = { \
T##_MidiSynth_Destruct, \
\
T##_MidiSynth_selectSoundfonts, \
T##_MidiSynth_setGain, \
T##_MidiSynth_stop, \
T##_MidiSynth_reset, \
T##_MidiSynth_update, \
T##_MidiSynth_process, \
\
T##_MidiSynth_Delete, \
}
MidiSynth *SSynth_create(ALCdevice *device);
MidiSynth *FSynth_create(ALCdevice *device);
MidiSynth *DSynth_create(ALCdevice *device);
MidiSynth *SynthCreate(ALCdevice *device);
#ifdef __cplusplus
}
#endif
#endif /* AL_MIDI_BASE_H */
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