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Determines the size of the transport buffer.
HRESULT DecideBufferSize( IMemAllocator * pAlloc, ALLOCATOR_PROPERTIES * pProperties );
Parameters
- pAlloc
- Pointer to the IMemAllocatorobject used by the output pin.
- pProperties
- Requested allocator properties for count, size, and alignment,
as specified by the
ALLOCATOR_PROPERTIESstructure.
Return Values
Returns NOERROR if successful; otherwise, returns an HRESULTvalue indicating the error. HRESULTcan be one of the following standard constants, or other values not listed.
E_FAIL Failure. E_POINTER Null pointer argument. E_INVALIDARG Invalid argument. E_NOTIMPL Method isn't supported. Remarks
This member function overrides the CTransformFilter::DecideBufferSizemember 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.