func: static void render_line(int x0, uint8_t y0, int x1, int y1, float *buf)
  
  {
  
      int dy  = y1 - y0;
  
      int adx = x1 - x0;
  
      int ady = FFABS(dy);
  
      int sy  = dy < 0 ? -1 : 1;
  
      buf[x0] = ff_vorbis_floor1_inverse_db_table[y0];
  
      if (ady*2 <= adx) { // optimized common case
  
          render_line_unrolled(x0, y0, x1, sy, ady, adx, buf);
  
      } else {
  
          int base  = dy / adx;
  
          int x     = x0;
  
          uint8_t y = y0;
  
          int err   = -adx;
  
          ady -= FFABS(base) * adx;
  
          while (++x < x1) {
  
              y += base;
  
              err += ady;
  
              if (err >= 0) {
  
                  err -= adx;
  
                  y   += sy;
  
              }
  
              buf[x] = ff_vorbis_floor1_inverse_db_table[y];
  
          }
  
      }
  
  }
  