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Ability to disable sound

This commit is contained in:
Jeffrey Pfau 2013-10-20 02:18:09 -07:00
parent ca80e5f32b
commit 76f02be757
1 changed files with 54 additions and 52 deletions
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106
src/gba/gba-audio.c
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@ -42,6 +42,7 @@ void GBAAudioInit(struct GBAAudio* audio) {
audio->sampleRate = 0x8000;
audio->soundcntLo = 0;
audio->soundcntHi = 0;
audio->soundcntX = 0;
audio->sampleInterval = GBA_ARM7TDMI_FREQUENCY / audio->sampleRate;
CircleBufferInit(&audio->left, GBA_AUDIO_SAMPLES * sizeof(int32_t));
@ -67,77 +68,78 @@ int32_t GBAAudioProcessEvents(struct GBAAudio* audio, int32_t cycles) {
audio->eventDiff += cycles;
while (audio->nextEvent <= 0) {
audio->nextEvent = INT_MAX;
if (audio->enable) {
audio->nextCh1 -= audio->eventDiff;
audio->nextCh2 -= audio->eventDiff;
audio->nextCh3 -= audio->eventDiff;
audio->nextCh4 -= audio->eventDiff;
audio->nextCh1 -= audio->eventDiff;
audio->nextCh2 -= audio->eventDiff;
audio->nextCh3 -= audio->eventDiff;
audio->nextCh4 -= audio->eventDiff;
if (audio->ch1.envelope.nextStep != INT_MAX) {
audio->ch1.envelope.nextStep -= audio->eventDiff;
if (audio->ch1.envelope.nextStep <= 0) {
_updateEnvelope(&audio->ch1.envelope);
if (audio->ch1.envelope.nextStep < audio->nextEvent) {
audio->nextEvent = audio->ch1.envelope.nextStep;
if (audio->ch1.envelope.nextStep != INT_MAX) {
audio->ch1.envelope.nextStep -= audio->eventDiff;
if (audio->ch1.envelope.nextStep <= 0) {
_updateEnvelope(&audio->ch1.envelope);
if (audio->ch1.envelope.nextStep < audio->nextEvent) {
audio->nextEvent = audio->ch1.envelope.nextStep;
}
}
}
}
if (audio->ch1.nextSweep != INT_MAX) {
audio->ch1.nextSweep -= audio->eventDiff;
if (audio->ch1.nextSweep <= 0) {
_updateSweep(&audio->ch1);
if (audio->ch1.nextSweep < audio->nextEvent) {
audio->nextEvent = audio->ch1.nextSweep;
if (audio->ch1.nextSweep != INT_MAX) {
audio->ch1.nextSweep -= audio->eventDiff;
if (audio->ch1.nextSweep <= 0) {
_updateSweep(&audio->ch1);
if (audio->ch1.nextSweep < audio->nextEvent) {
audio->nextEvent = audio->ch1.nextSweep;
}
}
}
}
if (audio->ch2.envelope.nextStep != INT_MAX) {
audio->ch2.envelope.nextStep -= audio->eventDiff;
if (audio->ch2.envelope.nextStep <= 0) {
_updateEnvelope(&audio->ch2.envelope);
if (audio->ch2.envelope.nextStep < audio->nextEvent) {
audio->nextEvent = audio->ch2.envelope.nextStep;
if (audio->ch2.envelope.nextStep != INT_MAX) {
audio->ch2.envelope.nextStep -= audio->eventDiff;
if (audio->ch2.envelope.nextStep <= 0) {
_updateEnvelope(&audio->ch2.envelope);
if (audio->ch2.envelope.nextStep < audio->nextEvent) {
audio->nextEvent = audio->ch2.envelope.nextStep;
}
}
}
}
if (audio->ch4.envelope.nextStep != INT_MAX) {
audio->ch4.envelope.nextStep -= audio->eventDiff;
if (audio->ch4.envelope.nextStep <= 0) {
_updateEnvelope(&audio->ch4.envelope);
if (audio->ch4.envelope.nextStep < audio->nextEvent) {
audio->nextEvent = audio->ch4.envelope.nextStep;
if (audio->ch4.envelope.nextStep != INT_MAX) {
audio->ch4.envelope.nextStep -= audio->eventDiff;
if (audio->ch4.envelope.nextStep <= 0) {
_updateEnvelope(&audio->ch4.envelope);
if (audio->ch4.envelope.nextStep < audio->nextEvent) {
audio->nextEvent = audio->ch4.envelope.nextStep;
}
}
}
}
if ((audio->ch1Right || audio->ch1Left) && audio->nextCh1 <= 0) {
audio->nextCh1 += _updateChannel1(&audio->ch1);
if (audio->nextCh1 < audio->nextEvent) {
audio->nextEvent = audio->nextCh1;
if ((audio->ch1Right || audio->ch1Left) && audio->nextCh1 <= 0) {
audio->nextCh1 += _updateChannel1(&audio->ch1);
if (audio->nextCh1 < audio->nextEvent) {
audio->nextEvent = audio->nextCh1;
}
}
}
if ((audio->ch2Right || audio->ch2Left) && audio->nextCh2 <= 0) {
audio->nextCh2 += _updateChannel2(&audio->ch2);
if (audio->nextCh2 < audio->nextEvent) {
audio->nextEvent = audio->nextCh2;
if ((audio->ch2Right || audio->ch2Left) && audio->nextCh2 <= 0) {
audio->nextCh2 += _updateChannel2(&audio->ch2);
if (audio->nextCh2 < audio->nextEvent) {
audio->nextEvent = audio->nextCh2;
}
}
}
if ((audio->ch3Right || audio->ch3Left) && audio->nextCh3 <= 0) {
audio->nextCh3 += _updateChannel3(&audio->ch3);
if (audio->nextCh3 < audio->nextEvent) {
audio->nextEvent = audio->nextCh3;
if ((audio->ch3Right || audio->ch3Left) && audio->nextCh3 <= 0) {
audio->nextCh3 += _updateChannel3(&audio->ch3);
if (audio->nextCh3 < audio->nextEvent) {
audio->nextEvent = audio->nextCh3;
}
}
}
if ((audio->ch4Right || audio->ch4Left) && audio->nextCh4 <= 0) {
audio->nextCh4 += _updateChannel4(&audio->ch4);
if (audio->nextCh4 < audio->nextEvent) {
audio->nextEvent = audio->nextCh4;
if ((audio->ch4Right || audio->ch4Left) && audio->nextCh4 <= 0) {
audio->nextCh4 += _updateChannel4(&audio->ch4);
if (audio->nextCh4 < audio->nextEvent) {
audio->nextEvent = audio->nextCh4;
}
}
}