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PSP2: Fix audio crackling when buffer is full

This commit is contained in:
Vicki Pfau 2018-09-25 11:55:35 -07:00
parent 50622f9e55
commit ec4e2e80d9
2 changed files with 9 additions and 3 deletions
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1
CHANGES
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@ -101,6 +101,7 @@ Misc:
Changes from beta 1:
Bugfixes:
- PSP2: Fix audio crackling after fast forward
- PSP2: Fix audio crackling when buffer is full
0.6 beta 1: (2018-09-24)
- Initial beta for 0.6

11
src/platform/psp2/psp2-context.c
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@ -97,18 +97,23 @@ void mPSP2MapKey(struct mInputMap* map, int pspKey, int key) {
static THREAD_ENTRY _audioThread(void* context) {
struct mPSP2AudioContext* audio = (struct mPSP2AudioContext*) context;
uint32_t zeroBuffer[PSP2_SAMPLES] = {0};
void* buffer = zeroBuffer;
int audioPort = sceAudioOutOpenPort(SCE_AUDIO_OUT_PORT_TYPE_MAIN, PSP2_SAMPLES, 48000, SCE_AUDIO_OUT_MODE_STEREO);
while (audio->running) {
MutexLock(&audio->mutex);
void* buffer;
if (buffer != zeroBuffer) {
// Can only happen in successive iterations
audio->samples -= PSP2_SAMPLES;
ConditionWake(&audio->cond);
}
if (audio->samples >= PSP2_SAMPLES) {
buffer = &audio->buffer[audio->readOffset];
audio->samples -= PSP2_SAMPLES;
audio->readOffset += PSP2_SAMPLES;
if (audio->readOffset >= PSP2_AUDIO_BUFFER_SIZE) {
audio->readOffset = 0;
}
ConditionWake(&audio->cond);
// Don't mark samples as read until the next loop iteration to prevent
// writing to the buffer while being read (see above)
} else {
buffer = zeroBuffer;
}