//_____________________________________________________________________________
//
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;
}
//=============================================================================
// CAAudioChannelLayout::operator!=
//=============================================================================
bool CAAudioChannelLayout::operator!= (const CAAudioChannelLayout &c) const
{
if (mLayout == c.mLayout)
return false;
return !(Layout() == c.Layout());
}
OSStatus CAAudioUnit::SetChannelLayout (AudioUnitScope inScope,
AudioUnitElement inEl,
CAAudioChannelLayout &inLayout)
{
OSStatus result = AudioUnitSetProperty (AU(),
kAudioUnitProperty_AudioChannelLayout,
inScope, inEl,
inLayout, inLayout.Size());
return result;
}
// _______________________________________________________________________________________
//
void CAAudioFile::SetConverterChannelLayout(bool output, const CAAudioChannelLayout &layout)
{
LOG_FUNCTION("CAAudioFile::SetConverterChannelLayout", "%p", this);
OSStatus err;
if (layout.IsValid()) {
#if VERBOSE_CHANNELMAP
printf("Setting converter's %s channel layout: %s\n", output ? "output" : "input",
CAChannelLayouts::ConstantToString(mFileChannelLayout.Tag()));
#endif
if (output) {
err = AudioConverterSetProperty(mConverter, kAudioConverterOutputChannelLayout,
layout.Size(), &layout.Layout());
XThrowIf(err && err != kAudioConverterErr_OperationNotSupported, err, "couldn't set converter's output channel layout");
} else {
err = AudioConverterSetProperty(mConverter, kAudioConverterInputChannelLayout,
layout.Size(), &layout.Layout());
XThrowIf(err && err != kAudioConverterErr_OperationNotSupported, err, "couldn't set converter's input channel layout");
}
if (mMode == kPreparingToWrite)
FileFormatChanged();
}
}
//=============================================================================
// CAAudioChannelLayout::operator==
//=============================================================================
bool CAAudioChannelLayout::operator== (const CAAudioChannelLayout &c) const
{
if (mLayout == c.mLayout)
return true;
return Layout() == c.Layout();
}
void CAAudioFileConverter::OpenOutputFile(const CAStreamBasicDescription &srcFormat, const CAStreamBasicDescription &destFormat, FSRef &destFSRef, CAAudioChannelLayout &destFileLayout)
{
const ConversionParameters ¶ms = mParams;
// output file
if (params.output.filePath == NULL) {
GenerateOutputFileName(params.input.filePath, srcFormat,
destFormat, params.output.fileType, mOutName);
} else
strcpy(mOutName, params.output.filePath);
// deal with pre-existing output file
if (FSPathMakeRef((UInt8 *)mOutName, &destFSRef, NULL) == noErr) {
XThrowIf(!(params.flags & kOpt_OverwriteOutputFile), 1, "overwrite output file");
// not allowed to overwrite
// output file exists - delete it
XThrowIfError(FSDeleteObject(&destFSRef), "delete output file");
}
// get FSRef/CFStringRef for output file
FSRef outFolderFSRef;
CFStringRef outFileName;
XThrowIfError(PosixPathToParentFSRefAndName(mOutName, outFolderFSRef, outFileName), "locate output audio file");
// create the output file
mDestFile.CreateNew(outFolderFSRef, outFileName, params.output.fileType, destFormat, &destFileLayout.Layout());
CFRelease(outFileName);
}
