IMemAllocator::ReleaseBuffer method (strmif.h)
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The ReleaseBuffer method releases a media sample.
Syntax
HRESULT ReleaseBuffer(
[in] IMediaSample *pBuffer
);
Parameters
[in] pBuffer
Pointer to the media sample's IMediaSample interface.
Return value
Returns S_OK if successful, or an HRESULT value indicating the cause of the error.
Remarks
When a media sample's reference count reaches zero, it calls this method with itself as the pBuffer parameter. This method releases the sample back to the allocator's list of available samples.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | strmif.h (include Dshow.h) |
| Library | Strmiids.lib |