HOR_DOWN_PRED    1093 libavcodec/h264pred.c         h->pred4x4[HOR_DOWN_PRED       ]= pred4x4_horizontal_down_c;
HOR_DOWN_PRED    1106 libavcodec/h264pred.c         h->pred4x4[HOR_DOWN_PRED       ]= pred4x4_horizontal_down_c;
HOR_DOWN_PRED    1123 libavcodec/h264pred.c     h->pred8x8l[HOR_DOWN_PRED       ]= pred8x8l_horizontal_down_c;
HOR_DOWN_PRED     856 libavcodec/rv34.c  VERT_RIGHT_PRED, VERT_LEFT_PRED, HOR_UP_PRED, HOR_DOWN_PRED,