CTransformFilter.DecideBufferSize method
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The DecideBufferSize
method sets the output pin's buffer requirements.
Syntax
virtual HRESULT DecideBufferSize(
IMemAllocator *pAlloc,
ALLOCATOR_PROPERTIES *ppropInputRequest
) = 0;
Parameters
-
pAlloc
-
Pointer to the IMemAllocator interface on the output pin's allocator.
-
ppropInputRequest
-
Pointer to an ALLOCATOR_PROPERTIES structure that contains buffer requirements from the downstream input pin.
Return value
Returns S_OK or another HRESULT value.
Remarks
The output pin's CTransformOutputPin::DecideBufferSize method calls this method. The derived class must implement this method. For more information, see CBaseOutputPin::DecideBufferSize.
Requirements
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