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CTransformOutputPin::DecideBufferSize

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Determines the number and size of buffers required.

HRESULT DecideBufferSize(
  IMemAllocator* pAlloc,
  ALLOCATOR_PROPERTIES* ppropInputRequest 
);

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 overrides the CBaseOutputPin::DecideBufferSize member function and calls the pure virtual CTransformFilter::DecideBufferSize member function, which your derived class must override and implement. This member function is called from the CBaseOutputPin class during the connection process.

Requirements

DirectShow applications and DirectShow filters have different include file and link library requirements. See Setting Up the Build Environment for more information.

OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
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Last updated on Wednesday, April 13, 2005

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