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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 |