Reason for the update
Media time requested. If no media time was requested then this is the current media time.
Amount of wall clock time by which this request was actually fulfilled early
size of the structure in bytes
Wall time corresponding to nMediaTimeStamp. A client may compare this value to current media time obtained from the Clock Component to determine the wall time until the media timestamp is really current.
Client private data to disabiguate this media time from others. Copied from the media time request. A value of zero is reserved for time scale updates.
Current media time scale in Q16 format.