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Retrieves the number and size of buffers required for the transfer.
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_PROPERTIES structure.
Return Values
Returns an HRESULT value.
Remarks
The CBaseOutputPin::DecideAllocator member function calls this member function.
You must override this member function in your derived class and call IMemAllocator::SetProperties.
Requirements
DirectShow applications and DirectShow filters have different include file and link library requirements.
For more information, see Setting Up the Build Environment.
OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
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