This method identifies the reference clock to which the filter should synchronize activity.

HRESULT SetSyncSource(
  IReferenceClock* pClock


Return Values

Returns an HRESULT value that depends on the implementation. HRESULT can be one of the following standard constants, or other values not listed.

Value Description
E_FAIL Failure.
E_POINTER Null pointer argument.
E_INVALIDARG Invalid argument.
E_NOTIMPL Method is not supported.
S_OK or NOERROR Success.


This method is of most importance to rendering filters and might not apply to other filters. The pClock parameter can be NULL, meaning that the filter should run as fast as possible at its current quality settings without any attempt to synchronize. For example, a filter graph that is doing compression probably runs in this mode. Each filter takes as long as it needs.


DirectShow applications and DirectShow filters have different include file and link library requirements. See Setting Up the Build Environment for more information.

OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.

See Also

IMediaFilter Interface

Last updated on Wednesday, April 13, 2005

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