encode_plane
encoding = encode_plane(frm->luma, ref_frm->luma, &rlco, rlco_max, cf,
encoding |= encode_plane(frm->cb, ref_frm->cb, &rlco, rlco_max,
encoding |= encode_plane(frm->cr, ref_frm->cr, &rlco, rlco_max,
encoding |= encode_plane(frm->alpha, ref_frm->alpha, &rlco,