protected void ReportSwitchMediaStreamCompleted (MediaStreamDescription mediaStreamDescription)
{
// FIXME: wrong/overzealous validations wrt SL2 (see unit tests)
if (closed || media_element == null || demuxer == IntPtr.Zero)
throw new InvalidOperationException ();
// FIXME: where is the mediaStreamDescription parameter being used ?
NativeMethods.imedia_demuxer_report_get_frame_completed (demuxer, IntPtr.Zero);
}