30 #define SUBSAMPLE(v, a, s) (v < 0) ? (-((-v + a) >> s)) : ((v + a) >> s)  macro
1742   int src_halfwidth = SUBSAMPLE(src_width, 1, 1);  in I420Scale()
1743   int src_halfheight = SUBSAMPLE(src_height, 1, 1);  in I420Scale()
1744   int dst_halfwidth = SUBSAMPLE(dst_width, 1, 1);  in I420Scale()
1745   int dst_halfheight = SUBSAMPLE(dst_height, 1, 1);  in I420Scale()
1779   int src_halfwidth = SUBSAMPLE(src_width, 1, 1);  in I420Scale_16()
1780   int src_halfheight = SUBSAMPLE(src_height, 1, 1);  in I420Scale_16()
1781   int dst_halfwidth = SUBSAMPLE(dst_width, 1, 1);  in I420Scale_16()
1782   int dst_halfheight = SUBSAMPLE(dst_height, 1, 1);  in I420Scale_16()
1835   int src_halfwidth = SUBSAMPLE(src_width, 1, 1);  in ScaleOffset()
1836   int src_halfheight = SUBSAMPLE(src_height, 1, 1);  in ScaleOffset()
1837   int dst_halfwidth = SUBSAMPLE(dst_width, 1, 1);  in ScaleOffset()
1838   int dst_halfheight = SUBSAMPLE(dst_height, 1, 1);  in ScaleOffset()