public static unsafe extern uint ExternalVideoTrackSource_CompleteFrameRequest(ExternalVideoTrackSourceHandle handle, uint requestId, long timestampMs, in I420AVideoFrame frame);
public static unsafe extern uint ExternalVideoTrackSource_CreateFromArgb32Callback( RequestExternalArgb32VideoFrameCallback callback, IntPtr userData, out ExternalVideoTrackSourceHandle sourceHandle);
public static unsafe extern void ExternalVideoTrackSource_AddRef(ExternalVideoTrackSourceHandle handle);
public static unsafe extern uint ExternalVideoTrackSource_FinishCreation(ExternalVideoTrackSourceHandle sourceHandle);