Lines Matching defs:sum
95 * The total_length is the sum of the lengths of all the data you will be
124 * sum of the lengths from these calls *must* add up to the total_length
2180 * as the "minimum sum of absolute differences" heuristic. Other
2181 * heuristics are the "weighted minimum sum of absolute differences"
2189 * (1) minimum sum of absolute differences from running average (i.e.,
2190 * keep running sum of non-absolute differences & count of bytes)
2192 * (1b) minimum sum of absolute differences from sliding average, probably
2194 * (2) minimum sum of squared differences from zero or running average
2206 png_uint_32 sum = 0;
2213 sum += (v < 128) ? v : 256 - v;
2221 sumlo = sum & PNG_LOMASK;
2222 sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK; /* Gives us some footroom */
2224 /* Reduce the sum if we match any of the previous rows */
2246 sum = PNG_MAXSUM;
2248 sum = (sumhi << PNG_HISHIFT) + sumlo;
2251 mins = sum;
2276 png_uint_32 sum = 0, lmins = mins;
2281 /* We temporarily increase the "minimum sum" by the factor we
2282 * would reduce the sum of this filter, so that we can do the
2283 * early exit comparison without scaling the sum each time.
2320 sum += (v < 128) ? v : 256 - v;
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;
2389 png_uint_32 sum = 0, lmins = mins;
2430 sum += (v < 128) ? v : 256 - v;
2432 if (sum > lmins) /* We are already worse, don't continue. */
2441 sumlo = sum & PNG_LOMASK;
2442 sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
2461 sum = PNG_MAXSUM;
2463 sum = (sumhi << PNG_HISHIFT) + sumlo;
2467 if (sum < mins)
2469 mins = sum;
2495 png_uint_32 sum = 0, lmins = mins;
2535 sum += (v < 128) ? v : 256 - v;
2542 sum += (v < 128) ? v : 256 - v;
2544 if (sum > lmins) /* We are already worse, don't continue. */
2553 sumlo = sum & PNG_LOMASK;
2554 sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
2573 sum = PNG_MAXSUM;
2575 sum = (sumhi << PNG_HISHIFT) + sumlo;
2579 if (sum < mins)
2581 mins = sum;
2628 png_uint_32 sum = 0, lmins = mins;
2668 sum += (v < 128) ? v : 256 - v;
2707 sum += (v < 128) ? v : 256 - v;
2709 if (sum > lmins) /* We are already worse, don't continue. */
2718 sumlo = sum & PNG_LOMASK;
2719 sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
2738 sum = PNG_MAXSUM;
2740 sum = (sumhi << PNG_HISHIFT) + sumlo;
2744 if (sum < mins)