IWMReaderAccelerator::GetCodecInterface method (wmsdkidl.h)
[The feature associated with this page, Windows Media Format 11 SDK, is a legacy feature. It has been superseded by Source Reader and Sink Writer. Source Reader and Sink Writer have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Source Reader and Sink Writer instead of Windows Media Format 11 SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The GetCodecInterface method is used to retrieve a pointer to the IWMCodecAMVideoAccelerator interface exposed on the decoder DMO.
Syntax
HRESULT GetCodecInterface(
[in] DWORD dwOutputNum,
[in] REFIID riid,
[out] void **ppvCodecInterface
);
Parameters
[in] dwOutputNum
DWORD containing the output number.
[in] riid
Reference to the IID of the interface to obtain. The value must be IID_IWMCodecAMVideoAccelerator.
[out] ppvCodecInterface
Address of a pointer that receives the interface specified by riid.
Return value
The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.
| Return code | Description |
|---|---|
|
The method succeeded. |
|
The WM Reader has no pointer to the codec. |
Requirements
| Minimum supported client | Windows 2000 Professional [desktop apps only],Windows Media Format 9 Series SDK, or later versions of the SDK |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | wmsdkidl.h (include Wmsdk.h) |
| Library | Wmvcore.lib; WMStubDRM.lib (if you use DRM) |