static void HP_PreferredChannels_ConstructDictionaryFromLayout(const AudioChannelLayout& inLayout, CACFDictionary& outLayoutDictionary)
{
// stick in the tag
outLayoutDictionary.AddUInt32(CFSTR("channel layout tag"), inLayout.mChannelLayoutTag);
// stick in the bitmap
outLayoutDictionary.AddUInt32(CFSTR("channel bitmap"), inLayout.mChannelBitmap);
// stick in the number channels
outLayoutDictionary.AddUInt32(CFSTR("number channels"), inLayout.mNumberChannelDescriptions);
// add the channel descriptions, if necessary
if(inLayout.mChannelLayoutTag == kAudioChannelLayoutTag_UseChannelDescriptions)
{
// create an array to hold the channel descriptions
CACFArray theChannelDescriptions(true);
if(theChannelDescriptions.IsValid())
{
// iterate through the descriptions and stick them in the array
for(UInt32 theChannelIndex = 0; theChannelIndex < inLayout.mNumberChannelDescriptions; ++theChannelIndex)
{
// create a dictionary to hold the description
CACFDictionary theDescription(true);
if(theDescription.IsValid())
{
// stick in the easy values
theDescription.AddUInt32(CFSTR("channel label"), inLayout.mChannelDescriptions[theChannelIndex].mChannelLabel);
theDescription.AddUInt32(CFSTR("channel flags"), inLayout.mChannelDescriptions[theChannelIndex].mChannelFlags);
// create an array to hold the coordinates
CACFArray theCoordinates(true);
if(theCoordinates.IsValid())
{
// add the coordinates to the array
for(UInt32 theCoordinateIndex = 0; theCoordinateIndex < 3; ++theCoordinateIndex)
{
theCoordinates.AppendFloat32(inLayout.mChannelDescriptions[theChannelIndex].mCoordinates[theCoordinateIndex]);
}
// add the array of coordinates to the description
theDescription.AddArray(CFSTR("coordinates"), theCoordinates.GetCFArray());
}
// add the description to the array of descriptions
theChannelDescriptions.AppendDictionary(theDescription.GetCFDictionary());
}
}
// add the array of descriptions to the layout dictionary
outLayoutDictionary.AddArray(CFSTR("channel descriptions"), theChannelDescriptions.GetCFArray());
}
}
}
OSStatus CAAudioChannelLayout::Save (CFPropertyListRef *outData) const
{
const AudioChannelLayout& layout = Layout();
CACFDictionary dict (false);
if (!dict.AddUInt32 (kACLTagKey, layout.mChannelLayoutTag))
goto badadd;
if (layout.mChannelBitmap && !dict.AddUInt32 (kACLBitmapKey, layout.mChannelBitmap))
goto badadd;
if (layout.mNumberChannelDescriptions)
{
CFMutableArrayRef descs = CFArrayCreateMutable (NULL, layout.mNumberChannelDescriptions, &kCFTypeArrayCallBacks);
const AudioChannelDescription *desc = layout.mChannelDescriptions;
for (unsigned int i = 0; i < layout.mNumberChannelDescriptions; ++i, ++desc)
{
CACFDictionary descDict (true);
if (!descDict.AddUInt32 (kACLLabelKey, desc->mChannelLabel))
{ CFRelease (descs); goto badadd; }
if (!descDict.AddUInt32 (kACLFlagsKey, desc->mChannelFlags))
{ CFRelease (descs); goto badadd; }
if (!descDict.AddFloat32 (kACLCoords0Key, desc->mCoordinates[0]))
{ CFRelease (descs); goto badadd; }
if (!descDict.AddFloat32 (kACLCoords1Key, desc->mCoordinates[1]))
{ CFRelease (descs); goto badadd; }
if (!descDict.AddFloat32 (kACLCoords2Key, desc->mCoordinates[2]))
{ CFRelease (descs); goto badadd; }
CFArrayAppendValue (descs, descDict.AsPropertyList());
}
dict.AddArray (kACLDescsKey, descs);
CFRelease (descs);
}
*outData = dict.GetDict();
return noErr;
badadd:
dict.ShouldRelease(true);
return paramErr;
}
