block_cmp         100 libavcodec/zmbvenc.c     bv = block_cmp(src, sstride, prev, pstride, bw, bh, xored);
block_cmp         107 libavcodec/zmbvenc.c             tv = block_cmp(src, sstride, prev + dx + dy*pstride, pstride, bw, bh, xored);