livetrax/libs/appleutility/CoreAudio/PublicUtility/CAAudioChannelLayoutObject.cpp

/*
     File: CAAudioChannelLayoutObject.cpp
 Abstract: CAAudioChannelLayoutObject.h
  Version: 1.1
 
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*/
#include "CAAudioChannelLayout.h"
#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
	#include <AudioToolbox/AudioFormat.h>
#else
	#include <AudioFormat.h>
#endif

CAAudioChannelLayout::CAAudioChannelLayout ()
{
	mLayout = RefCountedLayout::CreateWithNumberChannelDescriptions(0);
}

//=============================================================================
//	CAAudioChannelLayout::CAAudioChannelLayout
//=============================================================================
CAAudioChannelLayout::CAAudioChannelLayout (UInt32 inNumberChannels, bool inChooseSurround)
{		
		// this chooses default layouts based on the number of channels...
	AudioChannelLayoutTag tag;
	
	switch (inNumberChannels) 
	{
		default:
			// here we have a "broken" layout, in the sense that we haven't any idea how to lay this out
			mLayout = RefCountedLayout::CreateWithNumberChannelDescriptions(inNumberChannels);
			SetAllToUnknown(*mLayout->GetLayout(), inNumberChannels);
			return; // don't fall into the tag case
		case 1:
			tag = kAudioChannelLayoutTag_Mono;
			break;
		case 2:
			tag = inChooseSurround ? kAudioChannelLayoutTag_Binaural : kAudioChannelLayoutTag_Stereo;
			break;
		case 4:
			tag = inChooseSurround ? kAudioChannelLayoutTag_Ambisonic_B_Format : kAudioChannelLayoutTag_AudioUnit_4;
			break;
		case 5:
			tag = inChooseSurround ? kAudioChannelLayoutTag_AudioUnit_5_0 : kAudioChannelLayoutTag_AudioUnit_5;
			break;
		case 6:
			tag = inChooseSurround ? kAudioChannelLayoutTag_AudioUnit_6_0 : kAudioChannelLayoutTag_AudioUnit_6;
			break;
		case 7:
			tag = kAudioChannelLayoutTag_AudioUnit_7_0;
			break;
		case 8:
			tag = kAudioChannelLayoutTag_AudioUnit_8;
			break;
	}
	
	mLayout = RefCountedLayout::CreateWithLayoutTag(tag);
}

//=============================================================================
//	CAAudioChannelLayout::CAAudioChannelLayout
//=============================================================================
CAAudioChannelLayout::CAAudioChannelLayout (AudioChannelLayoutTag inLayoutTag)
	: mLayout(NULL)
{
	SetWithTag(inLayoutTag);
}

//=============================================================================
//	CAAudioChannelLayout::CAAudioChannelLayout
//=============================================================================
CAAudioChannelLayout::CAAudioChannelLayout (const CAAudioChannelLayout &c)
	: mLayout(NULL)
{
	*this = c;
}


//=============================================================================
//	CAAudioChannelLayout::AudioChannelLayout
//=============================================================================
CAAudioChannelLayout::CAAudioChannelLayout (const AudioChannelLayout* inChannelLayout)
	: mLayout(NULL)
{
	*this = inChannelLayout;
}

//=============================================================================
//	CAAudioChannelLayout::~CAAudioChannelLayout
//=============================================================================
CAAudioChannelLayout::~CAAudioChannelLayout ()
{
	if (mLayout) {
		mLayout->release();
		mLayout = NULL;
	}
}

//=============================================================================
//	CAAudioChannelLayout::CAAudioChannelLayout
//=============================================================================
CAAudioChannelLayout& CAAudioChannelLayout::operator= (const CAAudioChannelLayout &c)
{
	if (mLayout != c.mLayout) {
		if (mLayout)
			mLayout->release();
	
		if ((mLayout = c.mLayout) != NULL)
			mLayout->retain();
	}
	
	return *this;
}

CAAudioChannelLayout&	CAAudioChannelLayout::operator= (const AudioChannelLayout* inChannelLayout)
{
	if (mLayout && &mLayout->Layout() == inChannelLayout)
		return *this;
		
	if (mLayout)
		mLayout->release();

	if (inChannelLayout == NULL) 
	{
		mLayout = RefCountedLayout::CreateWithNumberChannelDescriptions(0);
	}
	else
	{
		mLayout = RefCountedLayout::CreateWithLayout(inChannelLayout);
	}
	return *this;
}

void	CAAudioChannelLayout::SetWithTag(AudioChannelLayoutTag inTag)
{
	if (mLayout)
		mLayout->release();
	
	mLayout = RefCountedLayout::CreateWithLayoutTag(inTag);
}

//=============================================================================
//	CAAudioChannelLayout::operator==
//=============================================================================
bool		CAAudioChannelLayout::operator== (const CAAudioChannelLayout &c) const
{
	if (mLayout == c.mLayout)
		return true;
	return Layout() == c.Layout();
}

//=============================================================================
//	CAAudioChannelLayout::operator!=
//=============================================================================
bool		CAAudioChannelLayout::operator!= (const CAAudioChannelLayout &c) const
{
	if (mLayout == c.mLayout)
		return false;

	return !(Layout() == c.Layout());
}

//=============================================================================
//	CAAudioChannelLayout::Print
//=============================================================================
void		CAAudioChannelLayout::Print (FILE* file) const
{
	CAShowAudioChannelLayout (file, &Layout());
}