Exemple #1
0
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;
}
Exemple #2
0
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;
}