IWMWriterPostView::SetAllocateForPostView 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 It has been superseded by Source Reader and Sink Writer.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 SetAllocateForPostView method specifies whether the application, and not the writer, must supply the buffers.

Syntax

HRESULT SetAllocateForPostView(
  [in] WORD wStreamNumber,
  [in] BOOL fAllocate
);

Parameters

[in] wStreamNumber

WORD containing the stream number.

[in] fAllocate

Boolean value. Set to True if the application allocates buffers, and False if this is left to the reader.

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code	Description
S_OK	The method succeeded.
NS_E_INVALID_STREAM	The stream number specified by wStreamNumber is not valid.
E_OUTOFMEMORY	The method was unable to create an internal structure.

Remarks

The application can provide buffers for any of the outputs, rather than use those allocated by the reader. For example, some applications can allocate Microsoft DirectDraw® buffers.

The actual allocation of buffers is handled by the IWMReaderCallbackAdvanced interface.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only],Windows Media Format 7 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)

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