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CBaseFilter.NotifyEvent method

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[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The NotifyEvent method sends an event notification to the filter graph manager.

Syntax

HRESULT NotifyEvent(
   long     EventCode,
   LONG_PTR EventParam1,
   LONG_PTR EventParam2
);

Parameters

EventCode

Event notification code.

EventParam1

First parameter of the event.

EventParam2

Second parameter of the event.

Return value

Returns an HRESULT value. Possible values include those in the following table.

Return code Description
S_FALSE
 The filter graph manager is not accepting event notifications.
S_OK
 Success.
E_NOTIMPL
 Filter does not have a pointer to the IMediaEventSink interface.

Remarks

For a list of notification codes and parameter values, see Event Notification Codes.

In the base class, if the event code is EC_COMPLETE, the method sets the EventParam2 parameter to a pointer to the filter's IBaseFilter interface.

Requirements

Requirement Value
Header
Amfilter.h (include Streams.h)
Library
Strmbase.lib (retail builds);
Strmbasd.lib (debug builds)

See also

CBaseFilter Class