func: static av_always_inline void rv40_weak_loop_filter(uint8_t *src,
  
                                                     const int step,
  
                                                     const int stride,
  
                                                     const int filter_p1,
  
                                                     const int filter_q1,
  
                                                     const int alpha,
  
                                                     const int beta,
  
                                                     const int lim_p0q0,
  
                                                     const int lim_q1,
  
                                                     const int lim_p1)
  
  {
  
      uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
  
      int i, t, u, diff;
  
  
  
      for (i = 0; i < 4; i++, src += stride) {
  
          int diff_p1p0 = src[-2*step] - src[-1*step];
  
          int diff_q1q0 = src[ 1*step] - src[ 0*step];
  
          int diff_p1p2 = src[-2*step] - src[-3*step];
  
          int diff_q1q2 = src[ 1*step] - src[ 2*step];
  
  
  
          t = src[0*step] - src[-1*step];
  
          if (!t)
  
              continue;
  
  
  
          u = (alpha * FFABS(t)) >> 7;
  
          if (u > 3 - (filter_p1 && filter_q1))
  
              continue;
  
  
  
          t <<= 2;
  
          if (filter_p1 && filter_q1)
  
              t += src[-2*step] - src[1*step];
  
  
  
          diff = CLIP_SYMM((t + 4) >> 3, lim_p0q0);
  
          src[-1*step] = cm[src[-1*step] + diff];
  
          src[ 0*step] = cm[src[ 0*step] - diff];
  
  
  
          if (filter_p1 && FFABS(diff_p1p2) <= beta) {
  
              t = (diff_p1p0 + diff_p1p2 - diff) >> 1;
  
              src[-2*step] = cm[src[-2*step] - CLIP_SYMM(t, lim_p1)];
  
          }
  
  
  
          if (filter_q1 && FFABS(diff_q1q2) <= beta) {
  
              t = (diff_q1q0 + diff_q1q2 + diff) >> 1;
  
              src[ 1*step] = cm[src[ 1*step] - CLIP_SYMM(t, lim_q1)];
  
          }
  
      }
  
  }
  