UInt32 CAAUMIDIMap::NumberOfMaps (const CFDictionaryRef inData)
{
CACFDictionary dict (inData, false);
if (dict.HasKey (kParamMIDIStr))
{
CFArrayRef cfArray;
dict.GetArray (kParamMIDIStr, cfArray);
CACFArray array (cfArray, false);
return array.GetNumberItems();
}
return 0;
}
static void HP_PreferredChannels_ConstructLayoutFromDictionary(const CACFDictionary& inLayoutDictionary, AudioChannelLayout& outLayout)
{
// get the tag, bitmap
inLayoutDictionary.GetUInt32(CFSTR("channel layout tag"), outLayout.mChannelLayoutTag);
inLayoutDictionary.GetUInt32(CFSTR("channel bitmap"), outLayout.mChannelBitmap);
// get the number of channels specified in the dictionary
UInt32 theNumberChannelsInDictionary = 0;
inLayoutDictionary.GetUInt32(CFSTR("number channels"), theNumberChannelsInDictionary);
// get the descriptions if they are present and required
CFArrayRef __theDescriptions;
if((outLayout.mChannelLayoutTag == kAudioChannelLayoutTag_UseChannelDescriptions) && inLayoutDictionary.GetArray(CFSTR("channel descriptions"), __theDescriptions))
{
// don't release this array because it came straight out of the dictionary
CACFArray theDescriptions(__theDescriptions, false);
// get the number of items in the array
UInt32 theNumberItems = theDescriptions.GetNumberItems();
// iterate through the array and fill out the struct
for(UInt32 theItemIndex = 0; (theItemIndex < theNumberItems) && (theItemIndex < outLayout.mNumberChannelDescriptions); ++theItemIndex)
{
// get the description
CFDictionaryRef __theDescription;
if(theDescriptions.GetDictionary(theItemIndex, __theDescription))
{
// don't release this dictionary because it came straight out of the array
CACFDictionary theDescription(__theDescription, false);
// get the channel label and flags
theDescription.GetUInt32(CFSTR("channel label"), outLayout.mChannelDescriptions[theItemIndex].mChannelLabel);
theDescription.GetUInt32(CFSTR("channel flags"), outLayout.mChannelDescriptions[theItemIndex].mChannelFlags);
// get the coordinates
CFArrayRef __theCoordinates;
if(theDescription.GetArray(CFSTR("coordinates"), __theCoordinates))
{
// don't release this array because it came straight out of the dictionary
CACFArray theCoordinates(__theCoordinates, false);
// iterate through the array and get the coordinates
UInt32 theNumberCoordinates = theCoordinates.GetNumberItems();
for(UInt32 theCoordinateIndex = 0; (theCoordinateIndex < 3) && (theCoordinateIndex < theNumberCoordinates); ++theCoordinateIndex)
{
theCoordinates.GetFloat32(theCoordinateIndex, outLayout.mChannelDescriptions[theItemIndex].mCoordinates[theCoordinateIndex]);
}
}
}
}
}
}