CTransInPlaceFilter::DecideBufferSize

  • Article

Determines the size of the transport buffer.

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

Parameters

  • pAlloc
    Pointer to the IMemAllocator object used by the output pin.
  • pProperties
    Requested allocator properties for count, size, and alignment, as specified by the ALLOCATOR_PROPERTIES structure.

Return Values

Returns NOERROR if successful; otherwise, returns an HRESULT value indicating the error. HRESULT can be one of the following standard constants, or other values not listed.

Value Description
E_FAIL Failure.
E_POINTER Null pointer argument.
E_INVALIDARG Invalid argument.
E_NOTIMPL Method is not supported.

Remarks

This member function overrides the CTransformFilter::DecideBufferSize member function. It is called when the filter must provide its own allocator. Allocator requirements are obtained from the filter's input pin and passed to the output pin.

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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