IMemAllocatorNotifyCallbackTemp::NotifyRelease 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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 NotifyRelease method is called whenever the allocator's IMemAllocator::ReleaseBuffer method is called. The ReleaseBuffer method returns a media sample to the allocator's free list. Samples call this method when their reference counts reach zero.
Syntax
HRESULT NotifyRelease();
Return value
Return S_OK or an error code.
Remarks
In general, this call can occur on any thread, and the caller may be holding critical sections. Therefore, this method should not do anything that could cause a deadlock. Instead, the method should set an event or post a message to another thread, and the other thread should take any required actions.
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 |