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Fix potential issues with sound playing when they shouldn't, or with the wrong volume

This commit is contained in:
Jeffrey Pfau 2013-10-29 02:19:58 -07:00
parent 8902635e3a
commit 9fd181dba9
1 changed files with 13 additions and 1 deletions
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14
src/gba/gba-audio.c
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@ -73,10 +73,12 @@ int32_t GBAAudioProcessEvents(struct GBAAudio* audio, int32_t cycles) {
if (audio->ch1.envelope.nextStep != INT_MAX) {
audio->ch1.envelope.nextStep -= audio->eventDiff;
if (audio->ch1.envelope.nextStep <= 0) {
int8_t sample = audio->ch1.control.hi * 0x10 - 0x8;
_updateEnvelope(&audio->ch1.envelope);
if (audio->ch1.envelope.nextStep < audio->nextEvent) {
audio->nextEvent = audio->ch1.envelope.nextStep;
}
audio->ch1.sample = sample * audio->ch1.envelope.currentVolume;
}
}
@ -110,10 +112,12 @@ int32_t GBAAudioProcessEvents(struct GBAAudio* audio, int32_t cycles) {
if (audio->ch2.envelope.nextStep != INT_MAX) {
audio->ch2.envelope.nextStep -= audio->eventDiff;
if (audio->ch2.envelope.nextStep <= 0) {
int8_t sample = audio->ch2.control.hi * 0x10 - 0x8;
_updateEnvelope(&audio->ch2.envelope);
if (audio->ch2.envelope.nextStep < audio->nextEvent) {
audio->nextEvent = audio->ch2.envelope.nextStep;
}
audio->ch2.sample = sample * audio->ch2.envelope.currentVolume;
}
}
@ -154,10 +158,12 @@ int32_t GBAAudioProcessEvents(struct GBAAudio* audio, int32_t cycles) {
if (audio->ch4.envelope.nextStep != INT_MAX) {
audio->ch4.envelope.nextStep -= audio->eventDiff;
if (audio->ch4.envelope.nextStep <= 0) {
int8_t sample = (audio->ch4.sample >> 31) * 0x8;
_updateEnvelope(&audio->ch4.envelope);
if (audio->ch4.envelope.nextStep < audio->nextEvent) {
audio->nextEvent = audio->ch4.envelope.nextStep;
}
audio->ch4.sample = sample * audio->ch4.envelope.currentVolume;
}
}
@ -224,6 +230,7 @@ void GBAAudioWriteSOUND1CNT_HI(struct GBAAudio* audio, uint16_t value) {
audio->ch1.envelope.nextStep = INT_MAX;
if (audio->ch1.envelope.initialVolume == 0) {
audio->ch1.envelope.dead = 1;
audio->ch1.sample = 0;
}
}
}
@ -264,6 +271,7 @@ void GBAAudioWriteSOUND2CNT_LO(struct GBAAudio* audio, uint16_t value) {
audio->ch2.envelope.nextStep = INT_MAX;
if (audio->ch2.envelope.initialVolume == 0) {
audio->ch2.envelope.dead = 1;
audio->ch2.sample = 0;
}
}
}
@ -285,6 +293,9 @@ void GBAAudioWriteSOUND2CNT_HI(struct GBAAudio* audio, uint16_t value) {
void GBAAudioWriteSOUND3CNT_LO(struct GBAAudio* audio, uint16_t value) {
audio->ch3.bank.packed = value;
if (audio->ch3.control.endTime >= 0) {
audio->playingCh3 = audio->ch3.bank.enable;
}
}
void GBAAudioWriteSOUND3CNT_HI(struct GBAAudio* audio, uint16_t value) {
@ -295,7 +306,7 @@ void GBAAudioWriteSOUND3CNT_X(struct GBAAudio* audio, uint16_t value) {
audio->ch3.control.packed = value;
audio->ch3.control.endTime = (GBA_ARM7TDMI_FREQUENCY * (256 - audio->ch3.wave.length)) >> 8;
if (audio->ch3.control.restart) {
audio->playingCh3 = 1;
audio->playingCh3 = audio->ch3.bank.enable;
}
}
@ -308,6 +319,7 @@ void GBAAudioWriteSOUND4CNT_LO(struct GBAAudio* audio, uint16_t value) {
audio->ch4.envelope.nextStep = INT_MAX;
if (audio->ch4.envelope.initialVolume == 0) {
audio->ch4.envelope.dead = 1;
audio->ch4.sample = 0;
}
}
}