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GB Audio: Fix NRx2 writes while active (fixes #866)

This commit is contained in:
Vicki Pfau 2017-09-05 23:00:20 -07:00
parent 0a221d038a
commit 3ae911b829
2 changed files with 7 additions and 7 deletions
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1
CHANGES
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@ -35,6 +35,7 @@ Bugfixes:
- GB Memory: Actually load latch time from savestate
- GB Serialize: Fix game title check
- GB, GBA: Fix sync to video with frameskip
- GB Audio: Fix NRx2 writes while active (fixes mgba.io/i/866)
Misc:
- GBA Timer: Use global cycles for timers
- GBA: Extend oddly-sized ROMs to full address space (fixes mgba.io/i/722)

13
src/gb/audio.c
View File

@ -25,7 +25,7 @@ const int GB_AUDIO_VOLUME_MAX = 0x100;
static bool _writeSweep(struct GBAudioSweep* sweep, uint8_t value);
static void _writeDuty(struct GBAudioEnvelope* envelope, uint8_t value);
static bool _writeEnvelope(struct GBAudioEnvelope* envelope, uint8_t value);
static bool _writeEnvelope(struct GBAudioEnvelope* envelope, uint8_t value, enum GBAudioStyle style);
static void _resetSweep(struct GBAudioSweep* sweep);
static bool _resetEnvelope(struct GBAudioEnvelope* sweep);
@ -182,7 +182,7 @@ void GBAudioWriteNR11(struct GBAudio* audio, uint8_t value) {
}
void GBAudioWriteNR12(struct GBAudio* audio, uint8_t value) {
if (!_writeEnvelope(&audio->ch1.envelope, value)) {
if (!_writeEnvelope(&audio->ch1.envelope, value, audio->style)) {
mTimingDeschedule(audio->timing, &audio->ch1Event);
audio->playingCh1 = false;
*audio->nr52 &= ~0x0001;
@ -240,7 +240,7 @@ void GBAudioWriteNR21(struct GBAudio* audio, uint8_t value) {
}
void GBAudioWriteNR22(struct GBAudio* audio, uint8_t value) {
if (!_writeEnvelope(&audio->ch2.envelope, value)) {
if (!_writeEnvelope(&audio->ch2.envelope, value, audio->style)) {
mTimingDeschedule(audio->timing, &audio->ch2Event);
audio->playingCh2 = false;
*audio->nr52 &= ~0x0002;
@ -358,7 +358,7 @@ void GBAudioWriteNR41(struct GBAudio* audio, uint8_t value) {
}
void GBAudioWriteNR42(struct GBAudio* audio, uint8_t value) {
if (!_writeEnvelope(&audio->ch4.envelope, value)) {
if (!_writeEnvelope(&audio->ch4.envelope, value, audio->style)) {
mTimingDeschedule(audio->timing, &audio->ch4Event);
audio->playingCh4 = false;
*audio->nr52 &= ~0x0008;
@ -700,17 +700,16 @@ void _writeDuty(struct GBAudioEnvelope* envelope, uint8_t value) {
envelope->duty = GBAudioRegisterDutyGetDuty(value);
}
bool _writeEnvelope(struct GBAudioEnvelope* envelope, uint8_t value) {
bool _writeEnvelope(struct GBAudioEnvelope* envelope, uint8_t value, enum GBAudioStyle style) {
envelope->stepTime = GBAudioRegisterSweepGetStepTime(value);
envelope->direction = GBAudioRegisterSweepGetDirection(value);
envelope->initialVolume = GBAudioRegisterSweepGetInitialVolume(value);
if (!envelope->stepTime) {
if (style == GB_AUDIO_DMG && !envelope->stepTime) {
// TODO: Improve "zombie" mode
++envelope->currentVolume;
envelope->currentVolume &= 0xF;
}
_updateEnvelopeDead(envelope);
envelope->nextStep = envelope->stepTime;
return (envelope->initialVolume || envelope->direction) && envelope->dead != 2;
}