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CBaseMediaFilter::GetState

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Microsoft DirectShow 9.0

CBaseMediaFilter::GetState

The GetState method retrieves the object's state (running, stopped, or paused). This method implements the IMediaFilter::GetState method.

Syntax

  HRESULT GetState(
    DWORD dwMilliSecsTimeout,
    FILTER_STATE *State
);

Parameters

dwMilliSecsTimeout

Time-out interval, in milliseconds.

State

Pointer to a variable that receives a member of the FILTER_STATE enumerated type, indicating the object's state.

Return Value

Returns S_OK or E_POINTER.

Remarks

In the base class, all state transitions are synchronous and the dwMilliSecsTimeout parameter is ignored. If a derived class performs asynchronous state transitions, it should override this method to wait during state transitions, with a time-out of dwMilliSecsTimeout milliseconds.

Requirements

**  Header:** Declared in Amfilter.h; include Streams.h.

**  Library:** Use Strmbase.lib (retail builds) or Strmbasd.lib (debug builds).

See Also