mc_subpel        1498 libavcodec/diracdec.c         idx = mc_subpel(s, block, src, dstx, dsty, (block->ref&3)-1, plane);
mc_subpel        1505 libavcodec/diracdec.c         idx = mc_subpel(s, block, src, dstx, dsty, 0, plane);
mc_subpel        1507 libavcodec/diracdec.c         idx = mc_subpel(s, block, src, dstx, dsty, 1, plane);