IMFClockStateSink::OnClockRestart method (mfidl.h)

Called when the presentation clock restarts from the same position while paused.


HRESULT OnClockRestart(
  [in] MFTIME hnsSystemTime


[in] hnsSystemTime

The system time when the clock restarted, in 100-nanosecond units.

Return value

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.


This method is called if the presentation clock is paused and the IMFPresentationClock::Start method is called with the value PRESENTATION_CURRENT_POSITION.

The clock notifies the presentation time source by calling the time source's OnClockRestart method. This call occurs synchronously within the Start method. If the time source returns an error from OnClockRestart, the presentation clock's Start method returns an error and the state change does not take place.

For any object that is not the presentation time source, the OnClockRestart method is called asynchronously, after the state change is completed. In that case, the return value from this method is ignored.


Minimum supported client Windows Vista [desktop apps | UWP apps]
Minimum supported server Windows Server 2008 [desktop apps | UWP apps]
Target Platform Windows
Header mfidl.h
Library Mfuuid.lib

See also



Presentation Clock