Keep system memory pointer to video frame.

Hi there,
Maybe i`m missing something,

I have a simple case i`m acquire image from camera ( direct show for example).
the image pass thru the system ram to gpu memory ( correct me if i wrong) .

My “CPUMemoryTOP” top solution using only cpu.
( in this case algorithm runs better only on cpu).

There is a way to skip the copy of the frame to the gpu (in the input top) and get the pointer to the frame in system memory and only then send to the gpu ?

( this way we will able to add cpu process and save one copy )

kind of video\file in chop.

thank you !
B.