CARingBufferError CARingBuffer::Fetch(AudioBufferList *abl, UInt32 nFrames, SampleTime startRead)
{
SampleTime endRead = startRead + nFrames;
SampleTime startRead0 = startRead;
SampleTime endRead0 = endRead;
CARingBufferError err = ClipTimeBounds(startRead, endRead);
SampleTime readSizeFrames = endRead - startRead;
if (err) {
if ( readSizeFrames <= 0 ) { CARB_DEBUG( "POS1 read size frames too little. (%ld)\n", err ); return err; }
}
SInt32 destStartFrameOffset = startRead - startRead0;
if ( destStartFrameOffset > 0 ) {
CARB_DEBUG( "Fetch - Zeroing start bound\n" );
ZeroABL(abl, 0, destStartFrameOffset * mBytesPerFrame);
}
SInt32 destEndSize = endRead0 - endRead;
if ( destEndSize > 0 ) {
CARB_DEBUG( "Fetch - Zeroing end bound (%ld frames off)\n", destEndSize );
ZeroABL(abl, ( destStartFrameOffset + readSizeFrames ) * mBytesPerFrame, destEndSize * mBytesPerFrame);
}
Byte **buffers = mBuffers;
int offset0 = FrameOffset(startRead);
int offset1 = FrameOffset(endRead);
int destStartByteOffset = destStartFrameOffset * mBytesPerFrame;
int nbytes;
if ( offset0 < offset1 ) {
nbytes = offset1 - offset0;
FetchABL( abl, destStartByteOffset , buffers, offset0, nbytes );
} else {
nbytes = mCapacityBytes - offset0;
FetchABL( abl, destStartByteOffset , buffers, offset0, nbytes );
FetchABL( abl, destStartByteOffset + nbytes, buffers, 0 , offset1 );
nbytes += offset1;
}
int nchannels = abl->mNumberBuffers;
AudioBuffer *dest = abl->mBuffers;
while (--nchannels >= 0) {
dest->mDataByteSize = nbytes;
dest++;
}
OSStatus err2 = ClipTimeBounds( startRead, endRead );
err2 = worse( err, err2 );
readSizeFrames = endRead - startRead;
if ( err2 ) {
if ( readSizeFrames <= 0 ) { CARB_DEBUG( "POS2 read size frames too little. (%ld)\n", err2 ); return err2; }
}
if ( err2 ) {
CARB_DEBUG( "Returning error %ld.\n", err2 );
}
return err2;
}
CARingBufferError CARingBuffer::Fetch(AudioBufferList *abl, UInt32 nFrames, SampleTime startRead)
{
SampleTime endRead = startRead + nFrames;
SampleTime startRead0 = startRead;
SampleTime endRead0 = endRead;
SampleTime size;
CARingBufferError err = ClipTimeBounds(startRead, endRead);
if (err) return err;
size = endRead - startRead;
SInt32 destStartOffset = startRead - startRead0;
if(destStartOffset > nFrames)
return kCARingBufferError_CPUOverload;
if (destStartOffset > 0) {
ZeroABL(abl, 0, destStartOffset * mBytesPerFrame);
}
SInt32 destEndSize = endRead0 - endRead;
if (destEndSize > 0) {
ZeroABL(abl, destStartOffset + size, destEndSize * mBytesPerFrame);
}
Byte **buffers = mBuffers;
int offset0 = FrameOffset(startRead);
int offset1 = FrameOffset(endRead);
int nbytes;
if (offset0 < offset1) {
FetchABL(abl, destStartOffset, buffers, offset0, nbytes = offset1 - offset0);
} else {
nbytes = mCapacityBytes - offset0;
FetchABL(abl, destStartOffset, buffers, offset0, nbytes);
FetchABL(abl, destStartOffset + nbytes, buffers, 0, offset1);
nbytes += offset1;
}
int nchannels = abl->mNumberBuffers;
AudioBuffer *dest = abl->mBuffers;
while (--nchannels >= 0)
{
dest->mDataByteSize = nbytes;
dest++;
}
return noErr;
}
FSTCARingBufferError FSTCARingBuffer::Fetch(AudioBufferList *abl, UInt32 nFrames, SampleTime startRead)
{
SampleTime endRead = startRead + nFrames;
SampleTime startRead0 = startRead;
SampleTime endRead0 = endRead;
SampleTime size;
FSTCARingBufferError err = ClipTimeBounds(startRead, endRead);
if (err) return err;
size = endRead - startRead;
SInt32 idx, destStartOffset = startRead - startRead0;
if(mBufferList)
{
for(idx=0; idx<mBufferList->mNumberBuffers; idx++)
{
AudioBuffer * storeBuf = &mBufferList->mBuffers[idx],
* fetchBuf = &abl->mBuffers[idx];
mCapacityBytes = sizeof(float)*storeBuf->mNumberChannels * mCapacityFrames;
if (destStartOffset > 0)
{
ZeroAB(fetchBuf, 0, destStartOffset * sizeof(float)*fetchBuf->mNumberChannels);
}
SInt32 destEndSize = endRead0 - endRead;
if (destEndSize > 0)
{
ZeroAB(fetchBuf, (destStartOffset + size) * sizeof(float)*fetchBuf->mNumberChannels, destEndSize * sizeof(float)*fetchBuf->mNumberChannels);
}
int offset0 = startRead * sizeof(float) * storeBuf->mNumberChannels;
int offset1 = endRead * sizeof(float) * storeBuf->mNumberChannels;
int nbytes;
if(offset0 == offset1 == 0)
{
nbytes = 0;
}
if (offset0 < offset1)
{
FetchAB(fetchBuf, destStartOffset, storeBuf, offset0, nbytes = offset1 - offset0);
}
else
{
nbytes = mCapacityBytes - offset0;
FetchAB(fetchBuf, destStartOffset, storeBuf, offset0, nbytes);
FetchAB(fetchBuf, destStartOffset + nbytes, storeBuf, 0, offset1);
nbytes += offset1;
}
fetchBuf->mDataByteSize = nbytes;
}
}
else
{
if (destStartOffset > 0)
{
ZeroABL(abl, 0, destStartOffset * mBytesPerFrame);
}
SInt32 destEndSize = endRead0 - endRead;
if (destEndSize > 0)
{
ZeroABL(abl, destStartOffset + size, destEndSize * mBytesPerFrame);
}
Byte **buffers = mBuffers;
int offset0 = FrameOffset(startRead);
int offset1 = FrameOffset(endRead);
int nbytes;
if (offset0 < offset1)
{
FetchBufs(abl, destStartOffset, buffers, offset0, nbytes = offset1 - offset0);
}
else
{
nbytes = mCapacityBytes - offset0;
FetchBufs(abl, destStartOffset, buffers, offset0, nbytes);
FetchBufs(abl, destStartOffset + nbytes, buffers, 0, offset1);
nbytes += offset1;
}
int nchannels = abl->mNumberBuffers;
AudioBuffer *dest = abl->mBuffers;
while (--nchannels >= 0)
{
dest->mDataByteSize = nbytes;
dest++;
}
}
return noErr;
}
