IMemAllocatorCallbackTemp interface (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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 IMemAllocatorCallbackTemp interface enables a filter to receive a callback notification from an allocator whenever a sample is returned to the allocator's free list.
The use of this interface is deprecated.
Inheritance
The IMemAllocatorCallbackTemp interface inherits from IMemAllocator. IMemAllocatorCallbackTemp also has these types of members:
Methods
The IMemAllocatorCallbackTemp interface has these methods.
| IMemAllocatorCallbackTemp::GetFreeCount The GetFreeCount method returns the number of free media samples. This number equals the total number of media samples minus the number of samples that are currently held by filters. |
| IMemAllocatorCallbackTemp::SetNotify The SetNotify method sets or removes a callback on the allocator. The allocator calls the callback method whenever the allocator's IMemAllocator::ReleaseBuffer method is called. |
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) |