void TPCircularBufferDequeueBufferListFrames(TPCircularBuffer *buffer, UInt32 *ioLengthInFrames, AudioBufferList *outputBufferList, AudioTimeStamp *outTimestamp, const AudioStreamBasicDescription *audioFormat) {
bool hasTimestamp = false;
UInt32 bytesToGo = *ioLengthInFrames * audioFormat->mBytesPerFrame;
UInt32 bytesCopied = 0;
while ( bytesToGo > 0 ) {
AudioBufferList *bufferList = TPCircularBufferNextBufferList(buffer, !hasTimestamp ? outTimestamp : NULL);
if ( !bufferList ) break;
hasTimestamp = true;
long bytesToCopy = min(bytesToGo, bufferList->mBuffers[0].mDataByteSize);
if ( outputBufferList ) {
for ( int i=0; i<outputBufferList->mNumberBuffers; i++ ) {
assert(bytesCopied + bytesToCopy <= outputBufferList->mBuffers[i].mDataByteSize);
memcpy((char*)outputBufferList->mBuffers[i].mData + bytesCopied, bufferList->mBuffers[i].mData, bytesToCopy);
}
}
TPCircularBufferConsumeNextBufferListPartial(buffer, (int)bytesToCopy/audioFormat->mBytesPerFrame, audioFormat);
bytesToGo -= bytesToCopy;
bytesCopied += bytesToCopy;
}
*ioLengthInFrames -= bytesToGo / audioFormat->mBytesPerFrame;
}
void TPCircularBufferConsumeBufferListFrames(TPCircularBuffer *buffer, UInt32 *ioLengthInFrames, AudioBufferList *outputBufferList, AudioTimeStamp *outTimestamp, AudioStreamBasicDescription *audioFormat) {
// We'll advance the buffer list pointers as we add audio - save the originals to restore later
void *savedmData[2] = { outputBufferList ? outputBufferList->mBuffers[0].mData : NULL, outputBufferList && outputBufferList->mNumberBuffers == 2 ? outputBufferList->mBuffers[1].mData : NULL };
bool hasTimestamp = false;
UInt32 bytesToGo = *ioLengthInFrames * audioFormat->mBytesPerFrame;
while ( bytesToGo > 0 ) {
AudioBufferList *bufferList = TPCircularBufferNextBufferList(buffer, hasTimestamp ? outTimestamp : NULL);
hasTimestamp = true;
if ( !bufferList ) break;
UInt32 bytesToCopy = min(bytesToGo, bufferList->mBuffers[0].mDataByteSize);
if ( outputBufferList ) {
for ( int i=0; i<outputBufferList->mNumberBuffers; i++ ) {
memcpy(outputBufferList->mBuffers[i].mData, bufferList->mBuffers[i].mData, bytesToCopy);
outputBufferList->mBuffers[i].mData = (char*)outputBufferList->mBuffers[i].mData + bytesToCopy;
}
}
if ( bytesToCopy == bufferList->mBuffers[0].mDataByteSize ) {
TPCircularBufferConsumeNextBufferList(buffer);
} else {
for ( int i=0; i<bufferList->mNumberBuffers; i++ ) {
bufferList->mBuffers[i].mData = (char*)bufferList->mBuffers[i].mData + bytesToCopy;
bufferList->mBuffers[i].mDataByteSize -= bytesToCopy;
}
}
bytesToGo -= bytesToCopy;
}
*ioLengthInFrames -= bytesToGo / audioFormat->mBytesPerFrame;
// Restore buffers
if ( outputBufferList ) {
for ( int i=0; i<outputBufferList->mNumberBuffers; i++ ) {
outputBufferList->mBuffers[i].mData = savedmData[i];
outputBufferList->mBuffers[i].mDataByteSize = *ioLengthInFrames * audioFormat->mBytesPerFrame;
}
}
}
