1 typedef unsigned char uint8_t; 2 extern uint8_t ff_cropTbl[256 + 2 * 1024]; 3 ff_pred8x8_plane_c(uint8_t * src,int stride)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