IMFVideoSampleAllocatorCallback::SetCallback method (mfidl.h)
Sets the callback object that receives notification whenever a video sample is returned to the allocator.
Syntax
HRESULT SetCallback(
[in] IMFVideoSampleAllocatorNotify *pNotify
);
Parameters
[in] pNotify
A pointer to the IMFVideoSampleAllocatorNotify interface that receives notification, or NULL to remove the callback.
Return value
If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.
Remarks
To get a video sample from the allocator, call the IMFVideoSampleAllocator::AllocateSample method. When the sample is released, it returns to the pool of available samples. When this happens, the allocator invokes the IMFVideoSampleAllocatorNotify::NotifyRelease callback.
The allocator holds at most one callback pointer. Calling this method again replaces the previous callback pointer.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 7 [desktop apps | UWP apps] |
| Minimum supported server | Windows Server 2008 R2 [desktop apps | UWP apps] |
| Target Platform | Windows |
| Header | mfidl.h |