Function sgrproj_box_ab_internal

pub(crate) fn sgrproj_box_ab_internal<const BD: usize>(
    r: usize,
    af: &mut [u32],
    bf: &mut [u32],
    iimg: &[u32],
    iimg_sq: &[u32],
    iimg_stride: usize,
    start_x: usize,
    y: usize,
    stripe_w: usize,
    s: u32,
)