1typedef unsigned char uint8_t;
2extern uint8_t ff_cropTbl[256 + 2 * 1024];
3
4void ff_pred8x8_plane_c(uint8_t *src, int stride){
5  int j, k;
6  int a;
7  uint8_t *cm = ff_cropTbl + 1024;
8  const uint8_t * const src0 = src+3-stride;
9  const uint8_t *src1 = src+4*stride-1;
10  const uint8_t *src2 = src1-2*stride;
11  int H = src0[1] - src0[-1];
12  int V = src1[0] - src2[ 0];
13  for(k=2; k<=4; ++k) {
14    src1 += stride; src2 -= stride;
15    H += k*(src0[k] - src0[-k]);
16    V += k*(src1[0] - src2[ 0]);
17  }
18  H = ( 17*H+16 ) >> 5;
19  V = ( 17*V+16 ) >> 5;
20
21  a = 16*(src1[0] + src2[8]+1) - 3*(V+H);
22  for(j=8; j>0; --j) {
23    int b = a;
24    a += V;
25    src[0] = cm[ (b ) >> 5 ];
26    src[1] = cm[ (b+ H) >> 5 ];
27    src[2] = cm[ (b+2*H) >> 5 ];
28    src[3] = cm[ (b+3*H) >> 5 ];
29    src[4] = cm[ (b+4*H) >> 5 ];
30    src[5] = cm[ (b+5*H) >> 5 ];
31    src[6] = cm[ (b+6*H) >> 5 ];
32    src[7] = cm[ (b+7*H) >> 5 ];
33    src += stride;
34  }
35}
36