How to create IXAudio2VoiceCallback for source voice in Rust

Question

How do I create a IXAudio2VoiceCallback for a source voice using windows-rs crate for rust.

let mut result: Option<IXAudio2SourceVoice> = None;
xaudio2.CreateSourceVoice(
	&mut result,
	&waveformatex,
	0,
	XAUDIO2_MAX_FREQ_RATIO,
	None,
	None,
	None,
)?;

It is possible to pass a IXAudio2VoiceCallback to CreateSourceVoice but its unclear how I can instantiate this callback.

How do I instantiate a IXAudio2VoiceCallback ?

Answer 1

Hello @Lucas Philippi,

According to How to: Use Source Voice Callbacks, you need to

1. Create a class that inherits from the IXAudio2VoiceCallback interface.
2. Create a source voice with IXAudio2::CreateSourceVoice using an instance of the callback class created previously as the pCallback parameter.