CBasePin.QueryAccept method

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 QueryAccept method determines whether the pin accepts a specified media type. This method implements the IPin::QueryAccept method.

Syntax

HRESULT QueryAccept(
   const AM_MEDIA_TYPE *pmt
);

Parameters

pmt

Pointer to an AM_MEDIA_TYPE structure that specifies the media type.

Return value

Returns S_OK if the media type is acceptable. Otherwise, returns S_FALSE.

Remarks

In the base class, this method delegates to the CBasePin::CheckMediaType method. If CheckMediaType fails, QueryAccept returns S_FALSE.

This method does not hold the pin's critical section (CBasePin::m_pLock). If your derived class dynamically modifies the set of acceptable media types, you should override this method to hold the critical section.

Requirements

See also

CBasePin Class