Lines Matching defs:sum
73 * The total_length is the sum of the lengths of all the data you will be
96 * sum of the lengths from these calls *must* add up to the total_length
2077 * as the "minimum sum of absolute differences" heuristic. Other
2078 * heuristics are the "weighted minimum sum of absolute differences"
2086 * (1) minimum sum of absolute differences from running average (i.e.,
2087 * keep running sum of non-absolute differences & count of bytes)
2089 * (1b) minimum sum of absolute differences from sliding average, probably
2091 * (2) minimum sum of squared differences from zero or running average
2103 png_uint_32 sum = 0;
2110 sum += (v < 128) ? v : 256 - v;
2118 sumlo = sum & PNG_LOMASK;
2119 sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK; /* Gives us some footroom */
2121 /* Reduce the sum if we match any of the previous rows */
2143 sum = PNG_MAXSUM;
2145 sum = (sumhi << PNG_HISHIFT) + sumlo;
2148 mins = sum;
2173 png_uint_32 sum = 0, lmins = mins;
2178 /* We temporarily increase the "minimum sum" by the factor we
2179 * would reduce the sum of this filter, so that we can do the
2180 * early exit comparison without scaling the sum each time.
2217 sum += (v < 128) ? v : 256 - v;
2224 sum += (v < 128) ? v : 256 - v;
2226 if (sum > lmins) /* We are already worse, don't continue. */
2235 sumlo = sum & PNG_LOMASK;
2236 sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
2255 sum = PNG_MAXSUM;
2257 sum = (sumhi << PNG_HISHIFT) + sumlo;
2261 if (sum < mins)
2263 mins = sum;
2286 png_uint_32 sum = 0, lmins = mins;
2327 sum += (v < 128) ? v : 256 - v;
2329 if (sum > lmins) /* We are already worse, don't continue. */
2338 sumlo = sum & PNG_LOMASK;
2339 sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
2358 sum = PNG_MAXSUM;
2360 sum = (sumhi << PNG_HISHIFT) + sumlo;
2364 if (sum < mins)
2366 mins = sum;
2392 png_uint_32 sum = 0, lmins = mins;
2432 sum += (v < 128) ? v : 256 - v;
2439 sum += (v < 128) ? v : 256 - v;
2441 if (sum > lmins) /* We are already worse, don't continue. */
2450 sumlo = sum & PNG_LOMASK;
2451 sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
2470 sum = PNG_MAXSUM;
2472 sum = (sumhi << PNG_HISHIFT) + sumlo;
2476 if (sum < mins)
2478 mins = sum;
2525 png_uint_32 sum = 0, lmins = mins;
2565 sum += (v < 128) ? v : 256 - v;
2604 sum += (v < 128) ? v : 256 - v;
2606 if (sum > lmins) /* We are already worse, don't continue. */
2615 sumlo = sum & PNG_LOMASK;
2616 sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
2635 sum = PNG_MAXSUM;
2637 sum = (sumhi << PNG_HISHIFT) + sumlo;
2641 if (sum < mins)