IBaseFilter::QueryFilterInfo

  • 项目

This method returns information about the filter.

HRESULT QueryFilterInfo(
  FILTER_INFO* pInfo
);

Parameters

Return Values

Returns an HRESULT value that depends on the implementation. HRESULT can be one of the following standard constants or other values not listed.

Value Description
E_FAIL Failure.
E_POINTER Null pointer argument.
E_INVALIDARG Invalid argument.
E_NOTIMPL Method is not supported.
S_OK or NOERROR Success.

Remarks

The FILTER_INFO structure is defined as follows.

typedef struct _FilterInfo  {
    [string] WCHAR achName[MAX_FILTER_NAME]; // allowed to be null
    IFilterGraph * pGraph;                   // null if not part of graph
    } FILTER_INFO ;

Note that on return, if the pGraph member of the FILTER_INFO structure is non-NULL, it will have an outstanding reference count and should be released when the interface is no longer needed.

Requirements

DirectShow applications and DirectShow filters have different include file and link library requirements. See Setting Up the Build Environment for more information.

OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
Header:

Last updated on Wednesday, April 13, 2005

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