How to get an AudioUnit property value in Xamarin.iOS

Question

I'm working on an audio debug feature and trying to get the AudioUnit.AudioUnitPropertyIDType.Latency property value of my audio unit using Xamarin.iOS. Unfortunately I don't see related method to retrieve the value property value like audioUnit.GetParameter.

Though I can see and successfully set properties using audioUnit.SetParameter method.

Did I miss something?

Answer 1

Not an answer but AudioUnit has private AudioUnitSetProperty method which is exposed as SetAudioFormat, SetCurrentDevice and a number of other methods, but not for Latency. Looks like it wasn't implemented by Xamarin. But you always can use reflection ;)

public void SetAudioFormat(AudioStreamBasicDescription audioFormat, AudioUnitScopeType scope, uint audioUnitElement = 0U)
{
  int k = AudioUnit.AudioUnitSetProperty(this.handle, AudioUnitPropertyIDType.StreamFormat, scope, audioUnitElement, ref audioFormat, (uint) Marshal.SizeOf<AudioStreamBasicDescription>(audioFormat));
  if (k != 0)
    throw new AudioUnitException(k);
}