Microsoft Windows CE 3.0  

CTransformFilter::DecideBufferSize

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Sets 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

This member function is called by the CTransformOutputPin::DecideBufferSizemember function. Override and implement this member function to call the CMemAllocator::SetPropertiesmember function with appropriate values for the output stream. This call might fail if the allocator cannot satisfy the request.