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fysx
96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include "alMain.h"
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#include "alError.h"
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#include "evtqueue.h"
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#include "rwlock.h"
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#include "alu.h"
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#include "midi/base.h"
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typedef struct DSynth {
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DERIVE_FROM_TYPE(MidiSynth);
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} DSynth;
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static void DSynth_Construct(DSynth *self, ALCdevice *device);
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static DECLARE_FORWARD(DSynth, MidiSynth, void, Destruct)
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static DECLARE_FORWARD3(DSynth, MidiSynth, ALenum, selectSoundfonts, ALCcontext*, ALsizei, const ALuint*)
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static DECLARE_FORWARD1(DSynth, MidiSynth, void, setGain, ALfloat)
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static DECLARE_FORWARD1(DSynth, MidiSynth, void, setState, ALenum)
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static DECLARE_FORWARD(DSynth, MidiSynth, void, stop)
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static DECLARE_FORWARD(DSynth, MidiSynth, void, reset)
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static DECLARE_FORWARD1(DSynth, MidiSynth, void, update, ALCdevice*)
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static void DSynth_process(DSynth *self, ALuint SamplesToDo, ALfloat (*restrict DryBuffer)[BUFFERSIZE]);
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static void DSynth_Delete(DSynth *self);
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DEFINE_MIDISYNTH_VTABLE(DSynth);
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static void DSynth_Construct(DSynth *self, ALCdevice *device)
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{
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MidiSynth_Construct(STATIC_CAST(MidiSynth, self), device);
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SET_VTABLE2(DSynth, MidiSynth, self);
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}
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static void DSynth_processQueue(DSynth *self, ALuint64 time)
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{
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EvtQueue *queue = &STATIC_CAST(MidiSynth, self)->EventQueue;
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while(queue->pos < queue->size && queue->events[queue->pos].time <= time)
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queue->pos++;
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}
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static void DSynth_process(DSynth *self, ALuint SamplesToDo, ALfloatBUFFERSIZE*restrict UNUSED(DryBuffer))
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{
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MidiSynth *synth = STATIC_CAST(MidiSynth, self);
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if(synth->State != AL_PLAYING)
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return;
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synth->SamplesSinceLast += SamplesToDo;
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synth->SamplesToNext -= SamplesToDo;
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while(synth->SamplesToNext < 1.0f)
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{
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ALuint64 time = synth->NextEvtTime;
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if(time == UINT64_MAX)
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{
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synth->SamplesToNext = 0.0;
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break;
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}
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synth->SamplesSinceLast -= (time - synth->LastEvtTime) * synth->SamplesPerTick;
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synth->SamplesSinceLast = maxd(synth->SamplesSinceLast, 0.0);
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synth->LastEvtTime = time;
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DSynth_processQueue(self, time);
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synth->NextEvtTime = MidiSynth_getNextEvtTime(synth);
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if(synth->NextEvtTime != UINT64_MAX)
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synth->SamplesToNext += (synth->NextEvtTime - synth->LastEvtTime) * synth->SamplesPerTick;
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}
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}
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static void DSynth_Delete(DSynth *self)
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{
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free(self);
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}
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MidiSynth *DSynth_create(ALCdevice *device)
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{
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DSynth *synth = calloc(1, sizeof(*synth));
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if(!synth)
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{
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ERR("Failed to allocate DSynth\n");
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return NULL;
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}
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DSynth_Construct(synth, device);
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return STATIC_CAST(MidiSynth, synth);
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}
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