clip_interval     365 libavfilter/drawutils.c     clip_interval(dst_w, &x0, &w, NULL);
clip_interval     366 libavfilter/drawutils.c     clip_interval(dst_h, &y0, &h, NULL);
clip_interval     462 libavfilter/drawutils.c     clip_interval(dst_w, &x0, &mask_w, &xm0);
clip_interval     463 libavfilter/drawutils.c     clip_interval(dst_h, &y0, &mask_h, &ym0);