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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

Header

dshow.h,
Streams.h

Library

ole32.lib,
Ole32auth.lib,
Strmbase.lib,
Strmiids.lib,
uuid.lib

See Also

Reference

CTransformFilter Class