1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
#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;
#define READ(x_, buf_, len_) ((x_)->cb((buf_), (len_), (x_)->ptr))
#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 setState)(MidiSynth *self, ALenum state);
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_THUNK1(T, MidiSynth, void, setState, ALenum) \
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, ptr)); } \
\
static const struct MidiSynthVtable T##_MidiSynth_vtable = { \
T##_MidiSynth_Destruct, \
\
T##_MidiSynth_selectSoundfonts, \
T##_MidiSynth_setGain, \
T##_MidiSynth_setState, \
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 */
|
