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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_PROPERTIES structure.

Return Values

Returns an HRESULT value.

Remarks

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

 Last updated on Tuesday, July 13, 2004

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