Subversion Repositories openrisc

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;

  }

}