IWMReaderAccelerator::Notify method (wmsdkidl.h)

Article
4/26/2023

[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 It has been superseded by Source Reader and Sink Writer.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 Notify method is called by the source filter to pass in the negotiated media type.

Syntax

HRESULT Notify(
  [in] DWORD         dwOutputNum,
  [in] WM_MEDIA_TYPE *pSubtype
);

Parameters

[in] dwOutputNum

DWORD that specifies the stream associated with the notification.

[in] pSubtype

Pointer to a media type that describes the current connection parameters for the stream.

Return value

If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code .

Remarks

This method enables the reader to update its internal variables and commit to the DirectX VA connection. This is the last place the decoder or reader can fail.

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)