//=============================================================================
// CAAudioChannelLayout::CAAudioChannelLayout
//=============================================================================
CAAudioChannelLayout::CAAudioChannelLayout (UInt32 inNumberChannels, bool inChooseSurround)
{
// this chooses default layouts based on the number of channels...
UInt32 theSize = CalculateByteSize (inNumberChannels);
mLayoutHolder = new ACLRefCounter (theSize);
AudioChannelLayout* layout = mLayoutHolder->GetLayout();
layout->mNumberChannelDescriptions = inNumberChannels;
switch (inNumberChannels)
{
case 1:
layout->mChannelLayoutTag = kAudioChannelLayoutTag_Mono;
break;
case 2:
layout->mChannelLayoutTag = inChooseSurround ? kAudioChannelLayoutTag_Binaural : kAudioChannelLayoutTag_Stereo;
break;
case 4:
layout->mChannelLayoutTag = inChooseSurround ? kAudioChannelLayoutTag_Ambisonic_B_Format : kAudioChannelLayoutTag_AudioUnit_4;
break;
case 5:
layout->mChannelLayoutTag = inChooseSurround ? kAudioChannelLayoutTag_AudioUnit_5_0 : kAudioChannelLayoutTag_AudioUnit_5;
break;
case 6:
layout->mChannelLayoutTag = inChooseSurround ? kAudioChannelLayoutTag_AudioUnit_6_0 : kAudioChannelLayoutTag_AudioUnit_6;
break;
case 7:
layout->mChannelLayoutTag = kAudioChannelLayoutTag_AudioUnit_7_0;
break;
case 8:
layout->mChannelLayoutTag = kAudioChannelLayoutTag_AudioUnit_8;
break;
default:
// here we have a "broken" layout, in the sense that we haven't any idea how to lay this out
// the layout itself is all set to zeros
// ### no longer true ###
SetAllToUnknown(*layout, inNumberChannels);
break;
}
}
//=============================================================================
// 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);
}
