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
|
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include "alMain.h"
#include "alError.h"
#include "evtqueue.h"
#include "rwlock.h"
#include "alu.h"
#include "midi/base.h"
typedef struct DSynth {
DERIVE_FROM_TYPE(MidiSynth);
} DSynth;
static void DSynth_Construct(DSynth *self, ALCdevice *device);
static DECLARE_FORWARD(DSynth, MidiSynth, void, Destruct)
static DECLARE_FORWARD3(DSynth, MidiSynth, ALenum, selectSoundfonts, ALCcontext*, ALsizei, const ALuint*)
static DECLARE_FORWARD1(DSynth, MidiSynth, void, setGain, ALfloat)
static DECLARE_FORWARD(DSynth, MidiSynth, void, stop)
static DECLARE_FORWARD(DSynth, MidiSynth, void, reset)
static DECLARE_FORWARD1(DSynth, MidiSynth, void, update, ALCdevice*)
static void DSynth_process(DSynth *self, ALuint SamplesToDo, ALfloat (*restrict DryBuffer)[BUFFERSIZE]);
DECLARE_DEFAULT_ALLOCATORS(DSynth)
DEFINE_MIDISYNTH_VTABLE(DSynth);
static void DSynth_Construct(DSynth *self, ALCdevice *device)
{
MidiSynth_Construct(STATIC_CAST(MidiSynth, self), device);
SET_VTABLE2(DSynth, MidiSynth, self);
}
static void DSynth_processQueue(DSynth *self, ALuint64 time)
{
EvtQueue *queue = &STATIC_CAST(MidiSynth, self)->EventQueue;
while(queue->pos < queue->size && queue->events[queue->pos].time <= time)
queue->pos++;
}
static void DSynth_process(DSynth *self, ALuint SamplesToDo, ALfloatBUFFERSIZE*restrict UNUSED(DryBuffer))
{
MidiSynth *synth = STATIC_CAST(MidiSynth, self);
ALuint64 curtime;
if(synth->State != AL_PLAYING)
return;
synth->SamplesDone += SamplesToDo;
synth->ClockBase += (synth->SamplesDone/synth->SampleRate) * MIDI_CLOCK_RES;
synth->SamplesDone %= synth->SampleRate;
curtime = MidiSynth_getTime(synth);
DSynth_processQueue(self, maxi64(curtime-1, 0));
}
MidiSynth *DSynth_create(ALCdevice *device)
{
DSynth *synth = DSynth_New(sizeof(*synth));
if(!synth)
{
ERR("Failed to allocate DSynth\n");
return NULL;
}
memset(synth, 0, sizeof(*synth));
DSynth_Construct(synth, device);
return STATIC_CAST(MidiSynth, synth);
}
|
