| typedef unsigned char uint8_t; |
| extern uint8_t ff_cropTbl[256 + 2 * 1024]; |
| |
| void ff_pred8x8_plane_c(uint8_t *src, int stride){ |
| int j, k; |
| int a; |
| uint8_t *cm = ff_cropTbl + 1024; |
| const uint8_t * const src0 = src+3-stride; |
| const uint8_t *src1 = src+4*stride-1; |
| const uint8_t *src2 = src1-2*stride; |
| int H = src0[1] - src0[-1]; |
| int V = src1[0] - src2[ 0]; |
| for(k=2; k<=4; ++k) { |
| src1 += stride; src2 -= stride; |
| H += k*(src0[k] - src0[-k]); |
| V += k*(src1[0] - src2[ 0]); |
| } |
| H = ( 17*H+16 ) >> 5; |
| V = ( 17*V+16 ) >> 5; |
| |
| a = 16*(src1[0] + src2[8]+1) - 3*(V+H); |
| for(j=8; j>0; --j) { |
| int b = a; |
| a += V; |
| src[0] = cm[ (b ) >> 5 ]; |
| src[1] = cm[ (b+ H) >> 5 ]; |
| src[2] = cm[ (b+2*H) >> 5 ]; |
| src[3] = cm[ (b+3*H) >> 5 ]; |
| src[4] = cm[ (b+4*H) >> 5 ]; |
| src[5] = cm[ (b+5*H) >> 5 ]; |
| src[6] = cm[ (b+6*H) >> 5 ]; |
| src[7] = cm[ (b+7*H) >> 5 ]; |
| src += stride; |
| } |
| } |
