CBaseInputPin.GetAllocator method
[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetAllocator method retrieves the memory allocator proposed by this pin. This method implements the IMemInputPin::GetAllocator method.
Syntax
HRESULT GetAllocator(
IMemAllocator **ppAllocator
);
Parameters
-
ppAllocator
-
Address of a variable that receives a pointer to the allocator's IMemAllocator interface.
Return value
Returns S_OK if successful, or an error code from the CoCreateInstance function.
Remarks
This method creates a CMemAllocator object. Override this method if your filter uses an allocator from a downstream pin, or a custom allocator.
If the method succeeds, the IMemAllocator interface has an outstanding reference count. Be sure to release it when you are done.
Requirements
| Requirement | Value |
|---|---|
| Header |
|
| Library |
|
See also
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