IMemAllocator::ReleaseBuffer method (strmif.h)

Article
02/22/2024

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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