CTransformFilter::DecideBufferSize (Compact 2013)

3/26/2014

Sets the number and size of buffers required for the transfer.

Syntax

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 Value

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.

Requirements

See Also

Reference

CTransformFilter Class