public IXAudio2VoiceCallbackWrapper(IXAudio2VoiceCallback callback)
{
if (callback == null)
{
return;
}
_callback = callback;
// Store callbacks to prevent them from being garbage collected
_startCallback = (_, bytesRequired) => _callback.OnVoiceProcessingPassStart(bytesRequired);
_endCallback = _ => _callback.OnVoiceProcessingPassEnd();
_streamEndCallback = _ => _callback.OnStreamEnd();
_bufferStartCallback = (_, context) => _callback.OnBufferStart(context);
_bufferEndCallback = (_, context) => _callback.OnBufferEnd(context);
_loopEndCallback = (_, context) => _callback.OnLoopEnd(context);
_voiceErrorCallback = (_, context, error) => _callback.OnVoiceError(context, error);
// Allocate memory for the C++ interface
_nativePointer = Marshal.AllocHGlobal(IntPtr.Size * 8); // 7 methods + vtbl
// Write pointer to vtbl
Marshal.WriteIntPtr(_nativePointer, IntPtr.Add(_nativePointer, IntPtr.Size));
// Write the functions to the vtable
WriteFunctionPointer(1, _startCallback);
WriteFunctionPointer(2, _endCallback);
WriteFunctionPointer(3, _streamEndCallback);
WriteFunctionPointer(4, _bufferStartCallback);
WriteFunctionPointer(5, _bufferEndCallback);
WriteFunctionPointer(6, _loopEndCallback);
WriteFunctionPointer(7, _voiceErrorCallback);
}
