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Retrieves the number and size of buffers required for the transfer.
virtual HRESULT DecideBufferSize( IMemAllocator * pAlloc , ALLOCATOR_PROPERTIES * ppropInputRequest ) PURE;
Parameters
- pAlloc
- Allocator assigned to the transfer.
- ppropInputRequest
- Requested allocator properties for count, size, and alignment,
as specified by the
ALLOCATOR_PROPERTIESstructure.
Return Values
Returns an HRESULTvalue.
Remarks
The CBaseOutputPin::DecideAllocatormember function calls this member function. You must override this member function in your derived class and call IMemAllocator::SetProperties.