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4/8/2010

Negotiates an allocator to use with the asynchronous reader.

Syntax 

virtual HRESULT DecideAllocator(
  ImemAllocator* 
pAlloc,
  ALLOCATOR_PROPERTIES* 
pProps 
);

Parameters

pAlloc

Allocator to propose as the preferred allocator (optional). Pass NULL if you are not proposing an allocator.

pProps

Size, count, and alignment of the allocator (optional). Pass zero if not requesting the allocator properties.

Return Value

Returns S_OK if successful, VFW_E_BADALIGN if ePropscontains an invalid alignment property, E_OUTOFMEMORY if there is not enough memory available to create an allocator, and E_NOINTERFACE if the created IMemAllocatorinterface is invalid.

Remarks

This member function calls the IAsyncReader::RequestAllocatormethod to negotiate an allocator.

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