INSSBuffer::GetBufferAndLength method (wmsbuffer.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 It has been superseded by Source Reader and Sink Writer.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 GetBufferAndLength method retrieves the location and size of the used portion of the buffer controlled by the buffer object. Buffers are used to store samples. When reading ASF files, you can use the location and length to copy a sample from a buffer delivered by the reader or synchronous reader.
Syntax
HRESULT GetBufferAndLength(
[out] BYTE **ppdwBuffer,
[out] DWORD *pdwLength
);
Parameters
[out] ppdwBuffer
Pointer to a pointer to the buffer.
[out] pdwLength
Pointer to a DWORD containing the length of the buffer, in bytes.
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 ppdwBuffer or pdwLength parameter is NULL. |
Requirements
| 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 | wmsbuffer.h (include Wmsdk.h) |
| Library | Wmvcore.lib; WMStubDRM.lib (if you use DRM) |