| Microsoft DirectX 9.0 |
The DecideBufferSize method sets the output pin's buffer requirements.
Syntax
virtual HRESULT DecideBufferSize(
IMemAllocator *pAlloc,
ALLOCATOR_PROPERTIES *ppropInputRequest
) PURE;
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.
See Also