|Microsoft DirectX 9.0|
The GetAllocatorRequirements method retrieves the allocator properties requested by the input pin.
HRESULT GetAllocatorRequirements( ALLOCATOR_PROPERTIES *pProps );
[in] Pointer to an ALLOCATOR_PROPERTIES, structure which is filled in with the requirements.
Returns an HRESULT value. Possible values include those shown in the following table.
|E_POINTER||NULL pointer argument|
When an output pin initializes a memory allocator, it can call this method to determine whether the input pin has any buffer requirements. The input pin is not required to implement this method. If the filter has specific alignment or prefix requirements, it should implement this method.