Function full_search

fn full_search<T: Pixel>(
    fi: &FrameInvariants<T>,
    x_lo: isize,
    x_hi: isize,
    y_lo: isize,
    y_hi: isize,
    w: usize,
    h: usize,
    org_region: &PlaneRegion<'_, T>,
    p_ref: &Plane<T>,
    po: PlaneOffset,
    step: usize,
    lambda: u32,
    pmv: [MotionVector; 2],
) -> MotionSearchResult