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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 |
|
| Library |
|