void CAHALAudioDevice::GetAvailableDataDestinations(AudioObjectPropertyScope inScope, UInt32 inChannel, UInt32& ioNumberDestinations, UInt32* outDestinations) const
{
CAPropertyAddress theAddress(kAudioDevicePropertyPlayThruDestinations, inScope, inChannel);
UInt32 theNumberDestinations = std::min(GetNumberAvailableDataDestinations(inScope, inChannel), ioNumberDestinations);
UInt32 theSize = theNumberDestinations * SizeOf32(UInt32);
GetPropertyData(theAddress, 0, NULL, theSize, outDestinations);
ioNumberDestinations = theSize / SizeOf32(UInt32);
}
UInt32 CAHALAudioDevice::GetAvailableDataDestinationByIndex(AudioObjectPropertyScope inScope, UInt32 inChannel, UInt32 inIndex) const
{
AudioStreamID theAnswer = 0;
UInt32 theNumberDestinations = GetNumberAvailableDataDestinations(inScope, inChannel);
if((theNumberDestinations > 0) && (inIndex < theNumberDestinations))
{
CAAutoArrayDelete<UInt32> theDestinationList(theNumberDestinations);
GetAvailableDataDestinations(inScope, inChannel, theNumberDestinations, theDestinationList);
theAnswer = theDestinationList[inIndex];
}
return theAnswer;
}
