AudioBufferList & AUBufferList::PrepareBuffer(const CAStreamBasicDescription &format, UInt32 nFrames)
{
if (nFrames > mAllocatedFrames)
COMPONENT_THROW(kAudioUnitErr_TooManyFramesToProcess);
UInt32 nStreams;
UInt32 channelsPerStream;
if (format.IsInterleaved()) {
nStreams = 1;
channelsPerStream = format.mChannelsPerFrame;
} else {
nStreams = format.mChannelsPerFrame;
channelsPerStream = 1;
if (nStreams > mAllocatedStreams)
COMPONENT_THROW(kAudioUnitErr_FormatNotSupported);
}
AudioBufferList *abl = mPtrs;
abl->mNumberBuffers = nStreams;
AudioBuffer *buf = abl->mBuffers;
Byte *mem = mMemory;
UInt32 streamInterval = (mAllocatedFrames * format.mBytesPerFrame + 0xF) & ~0xF;
UInt32 bytesPerBuffer = nFrames * format.mBytesPerFrame;
for ( ; nStreams--; ++buf) {
buf->mNumberChannels = channelsPerStream;
buf->mData = mem;
buf->mDataByteSize = bytesPerBuffer;
mem += streamInterval;
}
if (UInt32(mem - mMemory) > mAllocatedBytes)
COMPONENT_THROW(kAudioUnitErr_TooManyFramesToProcess);
mPtrState = kPtrsToMyMemory;
return *mPtrs;
}
//_____________________________________________________________________________
//
UInt32 AUPannerBase::GetAudioChannelLayout( AudioUnitScope inScope,
AudioUnitElement inElement,
AudioChannelLayout * outLayoutPtr,
Boolean & outWritable)
{
SetDefaultChannelLayoutsIfNone();
outWritable = true;
CAAudioChannelLayout* caacl = NULL;
switch (inScope)
{
case kAudioUnitScope_Input:
caacl = &mInputLayout;
break;
case kAudioUnitScope_Output:
caacl = &mOutputLayout;
break;
default:
COMPONENT_THROW(kAudioUnitErr_InvalidScope);
}
if (inElement != 0)
COMPONENT_THROW(kAudioUnitErr_InvalidElement);
UInt32 size = caacl->IsValid() ? caacl->Size() : 0;
if (size > 0 && outLayoutPtr)
memcpy(outLayoutPtr, &caacl->Layout(), size);
return size;
}
UInt32 AUPinkNoise::GetChannelLayoutTags( AudioUnitScope scope,
AudioUnitElement element,
AudioChannelLayoutTag * outLayoutTags)
{
if (scope != kAudioUnitScope_Output) COMPONENT_THROW(kAudioUnitErr_InvalidScope);
if (element != 0) COMPONENT_THROW(kAudioUnitErr_InvalidElement);
if (outLayoutTags)
{
UInt32 numChannels = GetOutput(element)->GetStreamFormat().NumberChannels();
if(numChannels == 1)
outLayoutTags[0] = kAudioChannelLayoutTag_Mono;
else if(numChannels == 2)
outLayoutTags[0] = kAudioChannelLayoutTag_Stereo;
else if(numChannels == 4)
outLayoutTags[0] = kAudioChannelLayoutTag_Quadraphonic;
else if(numChannels == 5)
outLayoutTags[0] = kAudioChannelLayoutTag_Pentagonal;
else if(numChannels == 6)
outLayoutTags[0] = kAudioChannelLayoutTag_Hexagonal;
else if(numChannels == 8)
outLayoutTags[0] = kAudioChannelLayoutTag_Octagonal;
else
COMPONENT_THROW(kAudioUnitErr_InvalidPropertyValue);
}
return 1;
}
UInt32 AUPinkNoise::GetAudioChannelLayout( AudioUnitScope scope,
AudioUnitElement element,
AudioChannelLayout * outLayoutPtr,
Boolean & outWritable)
{
if (scope != kAudioUnitScope_Output) COMPONENT_THROW(kAudioUnitErr_InvalidScope);
if (element != 0) COMPONENT_THROW(kAudioUnitErr_InvalidElement);
UInt32 size = mOutputChannelLayout.IsValid() ? mOutputChannelLayout.Size() : 0;
if (size > 0 && outLayoutPtr)
memcpy(outLayoutPtr, mOutputChannelLayout, size);
outWritable = true;
return size;
}
AudioBufferList & AUBufferList::PrepareNullBuffer(const CAStreamBasicDescription &format, UInt32 nFrames)
{
UInt32 nStreams;
UInt32 channelsPerStream;
if (format.IsInterleaved()) {
nStreams = 1;
channelsPerStream = format.mChannelsPerFrame;
} else {
nStreams = format.mChannelsPerFrame;
channelsPerStream = 1;
if (nStreams > mAllocatedStreams)
COMPONENT_THROW(kAudioUnitErr_FormatNotSupported);
}
AudioBufferList *abl = mPtrs;
abl->mNumberBuffers = nStreams;
AudioBuffer *buf = abl->mBuffers;
UInt32 bytesPerBuffer = nFrames * format.mBytesPerFrame;
for ( ; nStreams--; ++buf) {
buf->mNumberChannels = channelsPerStream;
buf->mData = NULL;
buf->mDataByteSize = bytesPerBuffer;
}
mPtrState = kPtrsToExternalMemory;
return *mPtrs;
}
void AUInlineKernelBase::Process(const Float32 * srcp, Float32 * dstp, UInt32 frames, UInt32 channels, bool & silence)
{
if ((srcp != dstp) || (channels != 1)) {
COMPONENT_THROW(kAudioUnitErr_FormatNotSupported);
}
Process(dstp, frames, silence);
}
//_____________________________________________________________________________
//
// Helper method.
// returns the ParameterMapEvent object associated with the paramID
//
inline ParameterMapEvent& AUElement::GetParamEvent(AudioUnitParameterID paramID)
{
ParameterMapEvent *event;
if(mUseIndexedParameters)
{
if(paramID >= mIndexedParameters.size() )
COMPONENT_THROW(kAudioUnitErr_InvalidParameter);
event = &mIndexedParameters[paramID];
}
else
{
ParameterMap::iterator i = mParameters.find(paramID);
if (i == mParameters.end())
COMPONENT_THROW(kAudioUnitErr_InvalidParameter);
event = &(*i).second;
}
return *event;
}