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Enabled backfilling quiet samples for stereo

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- This is a bit of a hack that fixes mockingboard glitching
This commit is contained in:
Aaron Culliney 2015-07-08 20:14:16 -07:00
parent 66978056c9
commit 1b4962169a
1 changed files with 23 additions and 3 deletions
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26
src/audio/soundcore-opensles.c
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@ -41,7 +41,8 @@ typedef struct SLVoice {
SLVolumeItf bqPlayerVolume;
// working data buffer
uint8_t *ringBuffer; // ringBuffer of total size : bufferSize+idealBufSize
uint8_t *ringBuffer; // ringBuffer of total size : bufferSize+submitSize
uint8_t *submitBuf; // submitBuffer
unsigned long bufferSize; // ringBuffer non-overflow size
unsigned long submitSize; // buffer size OpenSLES expects/wants
unsigned long writeHead; // head of the writer of ringBuffer (speaker, mockingboard)
@ -55,6 +56,7 @@ typedef struct SLVoice {
// misc
unsigned long numChannels;
bool backfillQuiet
} SLVoice;
typedef struct SLVoices {
@ -124,7 +126,14 @@ static void bqPlayerCallback(SLAndroidSimpleBufferQueueItf bq, void *context) {
// enqueue next buffer of correct size to OpenSLES
// invariant : we can always read submitSize amount from the position of readHead
SLresult result = (*bq)->Enqueue(bq, voice->ringBuffer+voice->readHead, voice->submitSize);
SLresult result = SL_RESULT_SUCCESS;
if (voice->backfillQuiet) {
memcpy(voice->submitBuf, voice->ringBuffer+voice->readHead, voice->submitSize);
result = (*bq)->Enqueue(bq, voice->submitBuf, voice->submitSize);
memset(voice->ringBuffer+voice->readHead, 0x0, voice->submitSize);
} else {
result = (*bq)->Enqueue(bq, voice->ringBuffer+voice->readHead, voice->submitSize);
}
// now manage overflow/wrapping ... (it's easier to ask for buffer overflow forgiveness than permission ;-)
@ -133,6 +142,10 @@ static void bqPlayerCallback(SLAndroidSimpleBufferQueueItf bq, void *context) {
if (newReadHead >= voice->bufferSize) {
newReadHead = newReadHead - voice->bufferSize;
if (voice->backfillQuiet) {
memset(voice->ringBuffer+voice->bufferSize, 0x0, voice->submitSize);
memset(voice->ringBuffer, 0x0, newReadHead);
}
++newReadWrapCount;
}
@ -347,6 +360,7 @@ static SLVoice *_opensl_createVoice(unsigned long numChannels, const EngineConte
channelMask = SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT;
voice->submitSize = android_stereoBufferSubmitSizeSamples * opensles_audio_backend.systemSettings.bytesPerSample * numChannels;
voice->bufferSize = opensles_audio_backend.systemSettings.stereoBufferSizeSamples * opensles_audio_backend.systemSettings.bytesPerSample * numChannels;
voice->backfillQuiet = true;
LOG("ideal stereo submission bufsize is %lu (bytes:%lu)", (unsigned long)android_stereoBufferSubmitSizeSamples, (unsigned long)voice->submitSize);
} else {
channelMask = SL_SPEAKER_FRONT_CENTER;
@ -358,7 +372,13 @@ static SLVoice *_opensl_createVoice(unsigned long numChannels, const EngineConte
// Allocate enough space for the temp buffer (including a maximum allowed overflow)
voice->ringBuffer = malloc(voice->bufferSize + voice->submitSize/*max overflow*/);
if (voice->ringBuffer == NULL) {
ERRLOG("OOPS, Error allocating %d bytes", voice->bufferSize);
ERRLOG("OOPS, Error allocating %lu bytes", (unsigned long)voice->bufferSize+voice->submitSize);
break;
}
voice->submitBuf = malloc(voice->submitSize);
if (voice->submitBuf == NULL) {
ERRLOG("OOPS, Error allocating %lu bytes", (unsigned long)voice->submitSize);
break;
}