CBaseFilter.QueryFilterInfo 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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 QueryFilterInfo method retrieves information about the filter. This method implements the IBaseFilter::QueryFilterInfo method.

Syntax

HRESULT QueryFilterInfo(
   FILTER_INFO *pInfo
);

Parameters

pInfo

Pointer to a FILTER_INFO structure.

Return value

Returns S_OK or E_POINTER.

Remarks

This method copies the filter's name from the CBaseFilter::m_pName member variable into the achName member of the FILTER_INFO structure. If m_pName is NULL, the method sets achName to L'\0'.

The method sets the pGraph member of the FILTER_INFO structure equal to the CBaseFilter::m_pGraph member variable, and increments the reference count. The caller must release the interface.

Requirements

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

See also

CBaseFilter Class