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4/8/2010

Retrieves 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_PROPERTIESstructure.

Return Value

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.

Requirements

Windows Embedded CE Windows CE 2.12 and later
Windows Mobile Windows Mobile Version 5.0 and later
Note Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements
For more information, see Setting Up the Build Environment,
Version 2.12 requires DXPAK 1.0 or later