OpenAL32/Include/alMidi.h

   1 #ifndef ALMIDI_H
   2 #define ALMIDI_H
   3
   4 #include "alMain.h"
   5 #include "evtqueue.h"
   6
   7 #ifdef __cplusplus
   8 extern "C" {
   9 #endif
  10
  11 struct MidiSynthVtable;
  12
  13 typedef struct MidiSynth {
  14     EvtQueue EventQueue;
  15
  16     ALuint64 LastEvtTime;
  17     ALuint64 NextEvtTime;
  18     ALdouble SamplesSinceLast;
  19     ALdouble SamplesToNext;
  20
  21     ALdouble SamplesPerTick;
  22
  23     /* NOTE: This rwlock is for the state and soundfont. The EventQueue and
  24      * related must instead use the device lock as they're used in the mixer
  25      * thread.
  26      */
  27     RWLock Lock;
  28
  29     volatile ALfloat Gain;
  30     volatile ALenum State;
  31
  32     const struct MidiSynthVtable *vtbl;
  33 } MidiSynth;
  34
  35 ALfloat MidiSynth_getGain(const MidiSynth *self);
  36 ALuint64 MidiSynth_getTime(const MidiSynth *self);
  37
  38
  39 struct MidiSynthVtable {
  40     void (*const Destruct)(MidiSynth *self);
  41
  42     ALboolean (*const isSoundfont)(MidiSynth *self, const char *filename);
  43     ALenum (*const loadSoundfont)(MidiSynth *self, const char *filename);
  44
  45     void (*const setGain)(MidiSynth *self, ALfloat gain);
  46     void (*const setState)(MidiSynth *self, ALenum state);
  47
  48     void (*const stop)(MidiSynth *self);
  49     void (*const reset)(MidiSynth *self);
  50
  51     void (*const update)(MidiSynth *self, ALCdevice *device);
  52     void (*const process)(MidiSynth *self, ALuint samples, ALfloat (*restrict DryBuffer)[BUFFERSIZE]);
  53
  54     void (*const Delete)(MidiSynth *self);
  55 };
  56
  57 #define DEFINE_MIDISYNTH_VTABLE(T)                                            \
  58 DECLARE_THUNK(T, MidiSynth, void, Destruct)                                   \
  59 DECLARE_THUNK1(T, MidiSynth, ALboolean, isSoundfont, const char*)             \
  60 DECLARE_THUNK1(T, MidiSynth, ALenum, loadSoundfont, const char*)              \
  61 DECLARE_THUNK1(T, MidiSynth, void, setGain, ALfloat)                          \
  62 DECLARE_THUNK1(T, MidiSynth, void, setState, ALenum)                          \
  63 DECLARE_THUNK(T, MidiSynth, void, stop)                                       \
  64 DECLARE_THUNK(T, MidiSynth, void, reset)                                      \
  65 DECLARE_THUNK1(T, MidiSynth, void, update, ALCdevice*)                        \
  66 DECLARE_THUNK2(T, MidiSynth, void, process, ALuint, ALfloatBUFFERSIZE*restrict) \
  67 DECLARE_THUNK(T, MidiSynth, void, Delete)                                     \
  68                                                                               \
  69 static const struct MidiSynthVtable T##_MidiSynth_vtable = {                  \
  70     T##_MidiSynth_Destruct,                                                   \
  71                                                                               \
  72     T##_MidiSynth_isSoundfont,                                                \
  73     T##_MidiSynth_loadSoundfont,                                              \
  74     T##_MidiSynth_setGain,                                                    \
  75     T##_MidiSynth_setState,                                                   \
  76     T##_MidiSynth_stop,                                                       \
  77     T##_MidiSynth_reset,                                                      \
  78     T##_MidiSynth_update,                                                     \
  79     T##_MidiSynth_process,                                                    \
  80                                                                               \
  81     T##_MidiSynth_Delete,                                                     \
  82 }
  83
  84
  85 MidiSynth *SynthCreate(ALCdevice *device);
  86
  87 #ifdef __cplusplus
  88 }
  89 #endif
  90
  91 #endif /* ALMIDI_H */