1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709
|
/********************************************************************
* *
* THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009 *
* by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function: mode selection code
last mod: $Id$
********************************************************************/
#include <limits.h>
#include <string.h>
#include "encint.h"
#include "modedec.h"
typedef struct oc_fr_state oc_fr_state;
typedef struct oc_qii_state oc_qii_state;
typedef struct oc_enc_pipeline_state oc_enc_pipeline_state;
typedef struct oc_rd_metric oc_rd_metric;
typedef struct oc_mode_choice oc_mode_choice;
/*There are 8 possible schemes used to encode macro block modes.
Schemes 0-6 use a maximally-skewed Huffman code to code each of the modes.
The same set of Huffman codes is used for each of these 7 schemes, but the
mode assigned to each codeword varies.
Scheme 0 writes a custom mapping from codeword to MB mode to the bitstream,
while schemes 1-6 have a fixed mapping.
Scheme 7 just encodes each mode directly in 3 bits.*/
/*The mode orderings for the various mode coding schemes.
Scheme 0 uses a custom alphabet, which is not stored in this table.
This is the inverse of the equivalent table OC_MODE_ALPHABETS in the
decoder.*/
static const unsigned char OC_MODE_RANKS[7][OC_NMODES]={
/*Last MV dominates.*/
/*L P M N I G GM 4*/
{3,4,2,0,1,5,6,7},
/*L P N M I G GM 4*/
{2,4,3,0,1,5,6,7},
/*L M P N I G GM 4*/
{3,4,1,0,2,5,6,7},
/*L M N P I G GM 4*/
{2,4,1,0,3,5,6,7},
/*No MV dominates.*/
/*N L P M I G GM 4*/
{0,4,3,1,2,5,6,7},
/*N G L P M I GM 4*/
{0,5,4,2,3,1,6,7},
/*Default ordering.*/
/*N I M L P G GM 4*/
{0,1,2,3,4,5,6,7}
};
/*Initialize the mode scheme chooser.
This need only be called once per encoder.*/
void oc_mode_scheme_chooser_init(oc_mode_scheme_chooser *_chooser){
int si;
_chooser->mode_ranks[0]=_chooser->scheme0_ranks;
for(si=1;si<8;si++)_chooser->mode_ranks[si]=OC_MODE_RANKS[si-1];
}
/*Reset the mode scheme chooser.
This needs to be called once for each frame, including the first.*/
static void oc_mode_scheme_chooser_reset(oc_mode_scheme_chooser *_chooser){
int si;
memset(_chooser->mode_counts,0,OC_NMODES*sizeof(*_chooser->mode_counts));
/*Scheme 0 starts with 24 bits to store the mode list in.*/
_chooser->scheme_bits[0]=24;
memset(_chooser->scheme_bits+1,0,7*sizeof(*_chooser->scheme_bits));
for(si=0;si<8;si++){
/*Scheme 7 should always start first, and scheme 0 should always start
last.*/
_chooser->scheme_list[si]=7-si;
_chooser->scheme0_list[si]=_chooser->scheme0_ranks[si]=si;
}
}
/*This is the real purpose of this data structure: not actually selecting a
mode scheme, but estimating the cost of coding a given mode given all the
modes selected so far.
This is done via opportunity cost: the cost is defined as the number of bits
required to encode all the modes selected so far including the current one
using the best possible scheme, minus the number of bits required to encode
all the modes selected so far not including the current one using the best
possible scheme.
The computational expense of doing this probably makes it overkill.
Just be happy we take a greedy approach instead of trying to solve the
global mode-selection problem (which is NP-hard).
_mb_mode: The mode to determine the cost of.
Return: The number of bits required to code this mode.*/
static int oc_mode_scheme_chooser_cost(oc_mode_scheme_chooser *_chooser,
int _mb_mode){
int scheme0;
int scheme1;
int best_bits;
int mode_bits;
int si;
int scheme_bits;
scheme0=_chooser->scheme_list[0];
scheme1=_chooser->scheme_list[1];
best_bits=_chooser->scheme_bits[scheme0];
mode_bits=OC_MODE_BITS[scheme0+1>>3][_chooser->mode_ranks[scheme0][_mb_mode]];
/*Typical case: If the difference between the best scheme and the next best
is greater than 6 bits, then adding just one mode cannot change which
scheme we use.*/
if(_chooser->scheme_bits[scheme1]-best_bits>6)return mode_bits;
/*Otherwise, check to see if adding this mode selects a different scheme as
the best.*/
si=1;
best_bits+=mode_bits;
do{
/*For any scheme except 0, we can just use the bit cost of the mode's rank
in that scheme.*/
if(scheme1!=0){
scheme_bits=_chooser->scheme_bits[scheme1]+
OC_MODE_BITS[scheme1+1>>3][_chooser->mode_ranks[scheme1][_mb_mode]];
}
else{
int ri;
/*For scheme 0, incrementing the mode count could potentially change the
mode's rank.
Find the index where the mode would be moved to in the optimal list,
and use its bit cost instead of the one for the mode's current
position in the list.*/
/*We don't recompute scheme bits; this is computing opportunity cost, not
an update.*/
for(ri=_chooser->scheme0_ranks[_mb_mode];ri>0&&
_chooser->mode_counts[_mb_mode]>=
_chooser->mode_counts[_chooser->scheme0_list[ri-1]];ri--);
scheme_bits=_chooser->scheme_bits[0]+OC_MODE_BITS[0][ri];
}
if(scheme_bits<best_bits)best_bits=scheme_bits;
if(++si>=8)break;
scheme1=_chooser->scheme_list[si];
}
while(_chooser->scheme_bits[scheme1]-_chooser->scheme_bits[scheme0]<=6);
return best_bits-_chooser->scheme_bits[scheme0];
}
/*Incrementally update the mode counts and per-scheme bit counts and re-order
the scheme lists once a mode has been selected.
_mb_mode: The mode that was chosen.*/
static void oc_mode_scheme_chooser_update(oc_mode_scheme_chooser *_chooser,
int _mb_mode){
int ri;
int si;
_chooser->mode_counts[_mb_mode]++;
/*Re-order the scheme0 mode list if necessary.*/
for(ri=_chooser->scheme0_ranks[_mb_mode];ri>0;ri--){
int pmode;
pmode=_chooser->scheme0_list[ri-1];
if(_chooser->mode_counts[pmode]>=_chooser->mode_counts[_mb_mode])break;
/*Reorder the mode ranking.*/
_chooser->scheme0_ranks[pmode]++;
_chooser->scheme0_list[ri]=pmode;
}
_chooser->scheme0_ranks[_mb_mode]=ri;
_chooser->scheme0_list[ri]=_mb_mode;
/*Now add the bit cost for the mode to each scheme.*/
for(si=0;si<8;si++){
_chooser->scheme_bits[si]+=
OC_MODE_BITS[si+1>>3][_chooser->mode_ranks[si][_mb_mode]];
}
/*Finally, re-order the list of schemes.*/
for(si=1;si<8;si++){
int sj;
int scheme0;
int bits0;
sj=si;
scheme0=_chooser->scheme_list[si];
bits0=_chooser->scheme_bits[scheme0];
do{
int scheme1;
scheme1=_chooser->scheme_list[sj-1];
if(bits0>=_chooser->scheme_bits[scheme1])break;
_chooser->scheme_list[sj]=scheme1;
}
while(--sj>0);
_chooser->scheme_list[sj]=scheme0;
}
}
/*The number of bits required to encode a super block run.
_run_count: The desired run count; must be positive and less than 4130.*/
static int oc_sb_run_bits(int _run_count){
int i;
for(i=0;_run_count>=OC_SB_RUN_VAL_MIN[i+1];i++);
return OC_SB_RUN_CODE_NBITS[i];
}
/*The number of bits required to encode a block run.
_run_count: The desired run count; must be positive and less than 30.*/
static int oc_block_run_bits(int _run_count){
return OC_BLOCK_RUN_CODE_NBITS[_run_count-1];
}
/*State to track coded block flags and their bit cost.*/
struct oc_fr_state{
ptrdiff_t bits;
unsigned sb_partial_count:16;
unsigned sb_full_count:16;
unsigned b_coded_count_prev:8;
unsigned b_coded_count:8;
unsigned b_count:8;
signed int sb_partial:2;
signed int sb_full:2;
signed int b_coded_prev:2;
signed int b_coded:2;
};
static void oc_fr_state_init(oc_fr_state *_fr){
_fr->bits=0;
_fr->sb_partial_count=0;
_fr->sb_full_count=0;
_fr->b_coded_count_prev=0;
_fr->b_coded_count=0;
_fr->b_count=0;
_fr->sb_partial=-1;
_fr->sb_full=-1;
_fr->b_coded_prev=-1;
_fr->b_coded=-1;
}
static void oc_fr_state_advance_sb(oc_fr_state *_fr,
int _sb_partial,int _sb_full){
ptrdiff_t bits;
int sb_partial_count;
int sb_full_count;
bits=_fr->bits;
/*Extend the sb_partial run, or start a new one.*/
sb_partial_count=_fr->sb_partial;
if(_fr->sb_partial==_sb_partial){
if(sb_partial_count>=4129){
bits++;
sb_partial_count=0;
}
else bits-=oc_sb_run_bits(sb_partial_count);
}
else sb_partial_count=0;
sb_partial_count++;
bits+=oc_sb_run_bits(sb_partial_count);
if(!_sb_partial){
/*Extend the sb_full run, or start a new one.*/
sb_full_count=_fr->sb_full_count;
if(_fr->sb_full==_sb_full){
if(sb_full_count>=4129){
bits++;
sb_full_count=0;
}
else bits-=oc_sb_run_bits(sb_full_count);
}
else sb_full_count=0;
sb_full_count++;
bits+=oc_sb_run_bits(sb_full_count);
_fr->sb_full=_sb_full;
_fr->sb_full_count=sb_full_count;
}
_fr->bits=bits;
_fr->sb_partial=_sb_partial;
_fr->sb_partial_count=sb_partial_count;
}
/*Flush any outstanding block flags for a SB (e.g., one with fewer than 16
blocks).*/
static void oc_fr_state_flush_sb(oc_fr_state *_fr){
ptrdiff_t bits;
int sb_partial;
int sb_full=sb_full;
int b_coded_count;
int b_coded;
int b_count;
b_count=_fr->b_count;
if(b_count>0){
bits=_fr->bits;
b_coded=_fr->b_coded;
b_coded_count=_fr->b_coded_count;
if(b_coded_count>=b_count){
/*This SB was fully coded/uncoded; roll back the partial block flags.*/
bits-=oc_block_run_bits(b_coded_count);
if(b_coded_count>b_count)bits+=oc_block_run_bits(b_coded_count-b_count);
sb_partial=0;
sb_full=b_coded;
b_coded=_fr->b_coded_prev;
b_coded_count=_fr->b_coded_count_prev;
}
else{
/*It was partially coded.*/
sb_partial=1;
/*sb_full is unused.*/
}
_fr->bits=bits;
_fr->b_coded_count=b_coded_count;
_fr->b_coded_count_prev=b_coded_count;
_fr->b_count=0;
_fr->b_coded=b_coded;
_fr->b_coded_prev=b_coded;
oc_fr_state_advance_sb(_fr,sb_partial,sb_full);
}
}
static void oc_fr_state_advance_block(oc_fr_state *_fr,int _b_coded){
ptrdiff_t bits;
int b_coded_count;
int b_count;
int sb_partial;
int sb_full=sb_full;
bits=_fr->bits;
/*Extend the b_coded run, or start a new one.*/
b_coded_count=_fr->b_coded_count;
if(_fr->b_coded==_b_coded)bits-=oc_block_run_bits(b_coded_count);
else b_coded_count=0;
b_coded_count++;
b_count=_fr->b_count+1;
if(b_count>=16){
/*We finished a superblock.*/
if(b_coded_count>=16){
/*It was fully coded/uncoded; roll back the partial block flags.*/
if(b_coded_count>16)bits+=oc_block_run_bits(b_coded_count-16);
sb_partial=0;
sb_full=_b_coded;
_b_coded=_fr->b_coded_prev;
b_coded_count=_fr->b_coded_count_prev;
}
else{
bits+=oc_block_run_bits(b_coded_count);
/*It was partially coded.*/
sb_partial=1;
/*sb_full is unused.*/
}
_fr->bits=bits;
_fr->b_coded_count=b_coded_count;
_fr->b_coded_count_prev=b_coded_count;
_fr->b_count=0;
_fr->b_coded=_b_coded;
_fr->b_coded_prev=_b_coded;
oc_fr_state_advance_sb(_fr,sb_partial,sb_full);
}
else{
bits+=oc_block_run_bits(b_coded_count);
_fr->bits=bits;
_fr->b_coded_count=b_coded_count;
_fr->b_count=b_count;
_fr->b_coded=_b_coded;
}
}
static void oc_fr_skip_block(oc_fr_state *_fr){
oc_fr_state_advance_block(_fr,0);
}
static void oc_fr_code_block(oc_fr_state *_fr){
oc_fr_state_advance_block(_fr,1);
}
static int oc_fr_cost1(const oc_fr_state *_fr){
oc_fr_state tmp;
ptrdiff_t bits;
*&tmp=*_fr;
oc_fr_skip_block(&tmp);
bits=tmp.bits;
*&tmp=*_fr;
oc_fr_code_block(&tmp);
return (int)(tmp.bits-bits);
}
static int oc_fr_cost4(const oc_fr_state *_pre,const oc_fr_state *_post){
oc_fr_state tmp;
*&tmp=*_pre;
oc_fr_skip_block(&tmp);
oc_fr_skip_block(&tmp);
oc_fr_skip_block(&tmp);
oc_fr_skip_block(&tmp);
return (int)(_post->bits-tmp.bits);
}
struct oc_qii_state{
ptrdiff_t bits;
unsigned qi01_count:14;
signed int qi01:2;
unsigned qi12_count:14;
signed int qi12:2;
};
static void oc_qii_state_init(oc_qii_state *_qs){
_qs->bits=0;
_qs->qi01_count=0;
_qs->qi01=-1;
_qs->qi12_count=0;
_qs->qi12=-1;
}
static void oc_qii_state_advance(oc_qii_state *_qd,
const oc_qii_state *_qs,int _qii){
ptrdiff_t bits;
int qi01;
int qi01_count;
int qi12;
int qi12_count;
bits=_qs->bits;
qi01=_qii+1>>1;
qi01_count=_qs->qi01_count;
if(qi01==_qs->qi01){
if(qi01_count>=4129){
bits++;
qi01_count=0;
}
else bits-=oc_sb_run_bits(qi01_count);
}
else qi01_count=0;
qi01_count++;
bits+=oc_sb_run_bits(qi01_count);
qi12_count=_qs->qi12_count;
if(_qii){
qi12=_qii>>1;
if(qi12==_qs->qi12){
if(qi12_count>=4129){
bits++;
qi12_count=0;
}
else bits-=oc_sb_run_bits(qi12_count);
}
else qi12_count=0;
qi12_count++;
bits+=oc_sb_run_bits(qi12_count);
}
else qi12=_qs->qi12;
_qd->bits=bits;
_qd->qi01=qi01;
_qd->qi01_count=qi01_count;
_qd->qi12=qi12;
_qd->qi12_count=qi12_count;
}
/*Temporary encoder state for the analysis pipeline.*/
struct oc_enc_pipeline_state{
int bounding_values[256];
oc_fr_state fr[3];
oc_qii_state qs[3];
/*Condensed dequantization tables.*/
const ogg_uint16_t *dequant[3][3][2];
/*Condensed quantization tables.*/
const oc_iquant *enquant[3][3][2];
/*Skip SSD storage for the current MCU in each plane.*/
unsigned *skip_ssd[3];
/*Coded/uncoded fragment lists for each plane for the current MCU.*/
ptrdiff_t *coded_fragis[3];
ptrdiff_t *uncoded_fragis[3];
ptrdiff_t ncoded_fragis[3];
ptrdiff_t nuncoded_fragis[3];
/*The starting fragment for the current MCU in each plane.*/
ptrdiff_t froffset[3];
/*The starting row for the current MCU in each plane.*/
int fragy0[3];
/*The ending row for the current MCU in each plane.*/
int fragy_end[3];
/*The starting superblock for the current MCU in each plane.*/
unsigned sbi0[3];
/*The ending superblock for the current MCU in each plane.*/
unsigned sbi_end[3];
/*The number of tokens for zzi=1 for each color plane.*/
int ndct_tokens1[3];
/*The outstanding eob_run count for zzi=1 for each color plane.*/
int eob_run1[3];
/*Whether or not the loop filter is enabled.*/
int loop_filter;
};
static void oc_enc_pipeline_init(oc_enc_ctx *_enc,oc_enc_pipeline_state *_pipe){
ptrdiff_t *coded_fragis;
unsigned mcu_nvsbs;
ptrdiff_t mcu_nfrags;
int hdec;
int vdec;
int pli;
int qii;
int qti;
/*Initialize the per-plane coded block flag trackers.
These are used for bit-estimation purposes only; the real flag bits span
all three planes, so we can't compute them in parallel.*/
for(pli=0;pli<3;pli++)oc_fr_state_init(_pipe->fr+pli);
for(pli=0;pli<3;pli++)oc_qii_state_init(_pipe->qs+pli);
/*Set up the per-plane skip SSD storage pointers.*/
mcu_nvsbs=_enc->mcu_nvsbs;
mcu_nfrags=mcu_nvsbs*_enc->state.fplanes[0].nhsbs*16;
hdec=!(_enc->state.info.pixel_fmt&1);
vdec=!(_enc->state.info.pixel_fmt&2);
_pipe->skip_ssd[0]=_enc->mcu_skip_ssd;
_pipe->skip_ssd[1]=_pipe->skip_ssd[0]+mcu_nfrags;
_pipe->skip_ssd[2]=_pipe->skip_ssd[1]+(mcu_nfrags>>hdec+vdec);
/*Set up per-plane pointers to the coded and uncoded fragments lists.
Unlike the decoder, each planes' coded and uncoded fragment list is kept
separate during the analysis stage; we only make the coded list for all
three planes contiguous right before the final packet is output
(destroying the uncoded lists, which are no longer needed).*/
coded_fragis=_enc->state.coded_fragis;
for(pli=0;pli<3;pli++){
_pipe->coded_fragis[pli]=coded_fragis;
coded_fragis+=_enc->state.fplanes[pli].nfrags;
_pipe->uncoded_fragis[pli]=coded_fragis;
}
memset(_pipe->ncoded_fragis,0,sizeof(_pipe->ncoded_fragis));
memset(_pipe->nuncoded_fragis,0,sizeof(_pipe->nuncoded_fragis));
/*Set up condensed quantizer tables.*/
for(pli=0;pli<3;pli++){
for(qii=0;qii<_enc->state.nqis;qii++){
int qi;
qi=_enc->state.qis[qii];
for(qti=0;qti<2;qti++){
_pipe->dequant[pli][qii][qti]=_enc->state.dequant_tables[qi][pli][qti];
_pipe->enquant[pli][qii][qti]=_enc->enquant_tables[qi][pli][qti];
}
}
}
/*Initialize the tokenization state.*/
for(pli=0;pli<3;pli++){
_pipe->ndct_tokens1[pli]=0;
_pipe->eob_run1[pli]=0;
}
/*Initialize the bounding value array for the loop filter.*/
_pipe->loop_filter=!oc_state_loop_filter_init(&_enc->state,
_pipe->bounding_values);
}
/*Sets the current MCU stripe to super block row _sby.
Return: A non-zero value if this was the last MCU.*/
static int oc_enc_pipeline_set_stripe(oc_enc_ctx *_enc,
oc_enc_pipeline_state *_pipe,int _sby){
const oc_fragment_plane *fplane;
unsigned mcu_nvsbs;
int sby_end;
int notdone;
int vdec;
int pli;
mcu_nvsbs=_enc->mcu_nvsbs;
sby_end=_enc->state.fplanes[0].nvsbs;
notdone=_sby+mcu_nvsbs<sby_end;
if(notdone)sby_end=_sby+mcu_nvsbs;
vdec=0;
for(pli=0;pli<3;pli++){
fplane=_enc->state.fplanes+pli;
_pipe->sbi0[pli]=fplane->sboffset+(_sby>>vdec)*fplane->nhsbs;
_pipe->fragy0[pli]=_sby<<2-vdec;
_pipe->froffset[pli]=fplane->froffset
+_pipe->fragy0[pli]*(ptrdiff_t)fplane->nhfrags;
if(notdone){
_pipe->sbi_end[pli]=fplane->sboffset+(sby_end>>vdec)*fplane->nhsbs;
_pipe->fragy_end[pli]=sby_end<<2-vdec;
}
else{
_pipe->sbi_end[pli]=fplane->sboffset+fplane->nsbs;
_pipe->fragy_end[pli]=fplane->nvfrags;
}
vdec=!(_enc->state.info.pixel_fmt&2);
}
return notdone;
}
static void oc_enc_pipeline_finish_mcu_plane(oc_enc_ctx *_enc,
oc_enc_pipeline_state *_pipe,int _pli,int _sdelay,int _edelay){
int refi;
/*Copy over all the uncoded fragments from this plane and advance the uncoded
fragment list.*/
_pipe->uncoded_fragis[_pli]-=_pipe->nuncoded_fragis[_pli];
oc_state_frag_copy_list(&_enc->state,_pipe->uncoded_fragis[_pli],
_pipe->nuncoded_fragis[_pli],OC_FRAME_SELF,OC_FRAME_PREV,_pli);
_pipe->nuncoded_fragis[_pli]=0;
/*Perform DC prediction.*/
oc_enc_pred_dc_frag_rows(_enc,_pli,
_pipe->fragy0[_pli],_pipe->fragy_end[_pli]);
/*Finish DC tokenization.*/
oc_enc_tokenize_dc_frag_list(_enc,_pli,
_pipe->coded_fragis[_pli],_pipe->ncoded_fragis[_pli],
_pipe->ndct_tokens1[_pli],_pipe->eob_run1[_pli]);
_pipe->ndct_tokens1[_pli]=_enc->ndct_tokens[_pli][1];
_pipe->eob_run1[_pli]=_enc->eob_run[_pli][1];
/*And advance the coded fragment list.*/
_enc->state.ncoded_fragis[_pli]+=_pipe->ncoded_fragis[_pli];
_pipe->coded_fragis[_pli]+=_pipe->ncoded_fragis[_pli];
_pipe->ncoded_fragis[_pli]=0;
/*Apply the loop filter if necessary.*/
refi=_enc->state.ref_frame_idx[OC_FRAME_SELF];
if(_pipe->loop_filter){
oc_state_loop_filter_frag_rows(&_enc->state,_pipe->bounding_values,
refi,_pli,_pipe->fragy0[_pli]-_sdelay,_pipe->fragy_end[_pli]-_edelay);
}
else _sdelay=_edelay=0;
/*To fill borders, we have an additional two pixel delay, since a fragment
in the next row could filter its top edge, using two pixels from a
fragment in this row.
But there's no reason to delay a full fragment between the two.*/
oc_state_borders_fill_rows(&_enc->state,refi,_pli,
(_pipe->fragy0[_pli]-_sdelay<<3)-(_sdelay<<1),
(_pipe->fragy_end[_pli]-_edelay<<3)-(_edelay<<1));
}
/*Cost information about the coded blocks in a MB.*/
struct oc_rd_metric{
int uncoded_ac_ssd;
int coded_ac_ssd;
int ac_bits;
int dc_flag;
};
static int oc_enc_block_transform_quantize(oc_enc_ctx *_enc,
oc_enc_pipeline_state *_pipe,int _pli,ptrdiff_t _fragi,int _overhead_bits,
oc_rd_metric *_mo,oc_token_checkpoint **_stack){
OC_ALIGN16(ogg_int16_t dct[64]);
OC_ALIGN16(ogg_int16_t data[64]);
ogg_uint16_t dc_dequant;
const ogg_uint16_t *dequant;
const oc_iquant *enquant;
ptrdiff_t frag_offs;
int ystride;
const unsigned char *src;
const unsigned char *ref;
unsigned char *dst;
int frame_type;
int nonzero;
unsigned uncoded_ssd;
unsigned coded_ssd;
int coded_dc;
oc_token_checkpoint *checkpoint;
oc_fragment *frags;
int mb_mode;
int mv_offs[2];
int nmv_offs;
int ac_bits;
int borderi;
int qti;
int qii;
int pi;
int zzi;
int v;
int val;
int d;
int s;
int dc;
frags=_enc->state.frags;
frag_offs=_enc->state.frag_buf_offs[_fragi];
ystride=_enc->state.ref_ystride[_pli];
src=_enc->state.ref_frame_data[OC_FRAME_IO]+frag_offs;
borderi=frags[_fragi].borderi;
qii=frags[_fragi].qii;
if(qii&~3){
#if !defined(OC_COLLECT_METRICS)
if(_enc->sp_level>=OC_SP_LEVEL_EARLY_SKIP){
/*Enable early skip detection.*/
frags[_fragi].coded=0;
return 0;
}
#endif
/*Try and code this block anyway.*/
qii&=3;
frags[_fragi].qii=qii;
}
mb_mode=frags[_fragi].mb_mode;
ref=_enc->state.ref_frame_data[
_enc->state.ref_frame_idx[OC_FRAME_FOR_MODE(mb_mode)]]+frag_offs;
dst=_enc->state.ref_frame_data[_enc->state.ref_frame_idx[OC_FRAME_SELF]]
+frag_offs;
/*Motion compensation:*/
switch(mb_mode){
case OC_MODE_INTRA:{
nmv_offs=0;
oc_enc_frag_sub_128(_enc,data,src,ystride);
}break;
case OC_MODE_GOLDEN_NOMV:
case OC_MODE_INTER_NOMV:{
nmv_offs=1;
mv_offs[0]=0;
oc_enc_frag_sub(_enc,data,src,ref,ystride);
}break;
default:{
const oc_mv *frag_mvs;
frag_mvs=(const oc_mv *)_enc->state.frag_mvs;
nmv_offs=oc_state_get_mv_offsets(&_enc->state,mv_offs,_pli,
frag_mvs[_fragi][0],frag_mvs[_fragi][1]);
if(nmv_offs>1){
oc_enc_frag_copy2(_enc,dst,
ref+mv_offs[0],ref+mv_offs[1],ystride);
oc_enc_frag_sub(_enc,data,src,dst,ystride);
}
else oc_enc_frag_sub(_enc,data,src,ref+mv_offs[0],ystride);
}break;
}
#if defined(OC_COLLECT_METRICS)
{
unsigned satd;
switch(nmv_offs){
case 0:satd=oc_enc_frag_intra_satd(_enc,src,ystride);break;
case 1:{
satd=oc_enc_frag_satd_thresh(_enc,src,ref+mv_offs[0],ystride,UINT_MAX);
}break;
default:{
satd=oc_enc_frag_satd_thresh(_enc,src,dst,ystride,UINT_MAX);
}
}
_enc->frag_satd[_fragi]=satd;
}
#endif
/*Transform:*/
oc_enc_fdct8x8(_enc,dct,data);
/*Quantize the DC coefficient:*/
qti=mb_mode!=OC_MODE_INTRA;
enquant=_pipe->enquant[_pli][0][qti];
dc_dequant=_pipe->dequant[_pli][0][qti][0];
v=dct[0];
val=v<<1;
s=OC_SIGNMASK(val);
val+=dc_dequant+s^s;
val=((enquant[0].m*(ogg_int32_t)val>>16)+val>>enquant[0].l)-s;
dc=OC_CLAMPI(-580,val,580);
nonzero=0;
/*Quantize the AC coefficients:*/
dequant=_pipe->dequant[_pli][qii][qti];
enquant=_pipe->enquant[_pli][qii][qti];
for(zzi=1;zzi<64;zzi++){
v=dct[OC_FZIG_ZAG[zzi]];
d=dequant[zzi];
val=v<<1;
v=abs(val);
if(v>=d){
s=OC_SIGNMASK(val);
/*The bias added here rounds ties away from zero, since token
optimization can only decrease the magnitude of the quantized
value.*/
val+=d+s^s;
/*Note the arithmetic right shift is not guaranteed by ANSI C.
Hopefully no one still uses ones-complement architectures.*/
val=((enquant[zzi].m*(ogg_int32_t)val>>16)+val>>enquant[zzi].l)-s;
data[zzi]=OC_CLAMPI(-580,val,580);
nonzero=zzi;
}
else data[zzi]=0;
}
/*Tokenize.*/
checkpoint=*_stack;
ac_bits=oc_enc_tokenize_ac(_enc,_pli,_fragi,data,dequant,dct,nonzero+1,
_stack,qti?0:3);
/*Reconstruct.
TODO: nonzero may need to be adjusted after tokenization.*/
if(nonzero==0){
ogg_int16_t p;
int ci;
/*We round this dequant product (and not any of the others) because there's
no iDCT rounding.*/
p=(ogg_int16_t)(dc*(ogg_int32_t)dc_dequant+15>>5);
/*LOOP VECTORIZES.*/
for(ci=0;ci<64;ci++)data[ci]=p;
}
else{
data[0]=dc*dc_dequant;
oc_idct8x8(&_enc->state,data,nonzero+1);
}
if(!qti)oc_enc_frag_recon_intra(_enc,dst,ystride,data);
else{
oc_enc_frag_recon_inter(_enc,dst,
nmv_offs==1?ref+mv_offs[0]:dst,ystride,data);
}
frame_type=_enc->state.frame_type;
#if !defined(OC_COLLECT_METRICS)
if(frame_type!=OC_INTRA_FRAME)
#endif
{
/*In retrospect, should we have skipped this block?*/
oc_enc_frag_sub(_enc,data,src,dst,ystride);
coded_ssd=coded_dc=0;
if(borderi<0){
for(pi=0;pi<64;pi++){
coded_ssd+=data[pi]*data[pi];
coded_dc+=data[pi];
}
}
else{
ogg_int64_t mask;
mask=_enc->state.borders[borderi].mask;
for(pi=0;pi<64;pi++,mask>>=1)if(mask&1){
coded_ssd+=data[pi]*data[pi];
coded_dc+=data[pi];
}
}
/*Scale to match DCT domain.*/
coded_ssd<<=4;
/*We actually only want the AC contribution to the SSD.*/
coded_ssd-=coded_dc*coded_dc>>2;
#if defined(OC_COLLECT_METRICS)
_enc->frag_ssd[_fragi]=coded_ssd;
}
if(frame_type!=OC_INTRA_FRAME){
#endif
uncoded_ssd=_pipe->skip_ssd[_pli][_fragi-_pipe->froffset[_pli]];
if(uncoded_ssd<UINT_MAX){
/*Although the fragment coding overhead determination is accurate, it is
greedy, using very coarse-grained local information.
Allowing it to mildly discourage coding turns out to be beneficial, but
it's not clear that allowing it to encourage coding through negative
coding overhead deltas is useful.
For that reason, we disallow negative coding_overheads.*/
if(_overhead_bits<0)_overhead_bits=0;
if(uncoded_ssd<=coded_ssd+(_overhead_bits+ac_bits)*_enc->lambda&&
/*Don't allow luma blocks to be skipped in 4MV mode when VP3
compatibility is enabled.*/
(!_enc->vp3_compatible||mb_mode!=OC_MODE_INTER_MV_FOUR||_pli)){
/*Hm, not worth it; roll back.*/
oc_enc_tokenlog_rollback(_enc,checkpoint,(*_stack)-checkpoint);
*_stack=checkpoint;
frags[_fragi].coded=0;
return 0;
}
}
else _mo->dc_flag=1;
_mo->uncoded_ac_ssd+=uncoded_ssd;
_mo->coded_ac_ssd+=coded_ssd;
_mo->ac_bits+=ac_bits;
}
oc_qii_state_advance(_pipe->qs+_pli,_pipe->qs+_pli,qii);
frags[_fragi].dc=dc;
frags[_fragi].coded=1;
return 1;
}
static int oc_enc_mb_transform_quantize_luma(oc_enc_ctx *_enc,
oc_enc_pipeline_state *_pipe,unsigned _mbi,int _mode_overhead){
/*Worst case token stack usage for 4 fragments.*/
oc_token_checkpoint stack[64*4];
oc_token_checkpoint *stackptr;
const oc_sb_map *sb_maps;
signed char *mb_modes;
oc_fragment *frags;
ptrdiff_t *coded_fragis;
ptrdiff_t ncoded_fragis;
ptrdiff_t *uncoded_fragis;
ptrdiff_t nuncoded_fragis;
oc_rd_metric mo;
oc_fr_state fr_checkpoint;
oc_qii_state qs_checkpoint;
int mb_mode;
int ncoded;
ptrdiff_t fragi;
int bi;
*&fr_checkpoint=*(_pipe->fr+0);
*&qs_checkpoint=*(_pipe->qs+0);
sb_maps=(const oc_sb_map *)_enc->state.sb_maps;
mb_modes=_enc->state.mb_modes;
frags=_enc->state.frags;
coded_fragis=_pipe->coded_fragis[0];
ncoded_fragis=_pipe->ncoded_fragis[0];
uncoded_fragis=_pipe->uncoded_fragis[0];
nuncoded_fragis=_pipe->nuncoded_fragis[0];
mb_mode=mb_modes[_mbi];
ncoded=0;
stackptr=stack;
memset(&mo,0,sizeof(mo));
for(bi=0;bi<4;bi++){
fragi=sb_maps[_mbi>>2][_mbi&3][bi];
frags[fragi].mb_mode=mb_mode;
if(oc_enc_block_transform_quantize(_enc,
_pipe,0,fragi,oc_fr_cost1(_pipe->fr+0),&mo,&stackptr)){
oc_fr_code_block(_pipe->fr+0);
coded_fragis[ncoded_fragis++]=fragi;
ncoded++;
}
else{
*(uncoded_fragis-++nuncoded_fragis)=fragi;
oc_fr_skip_block(_pipe->fr+0);
}
}
if(_enc->state.frame_type!=OC_INTRA_FRAME){
if(ncoded>0&&!mo.dc_flag){
int cost;
/*Some individual blocks were worth coding.
See if that's still true when accounting for mode and MV overhead.*/
cost=mo.coded_ac_ssd+_enc->lambda*(mo.ac_bits
+oc_fr_cost4(&fr_checkpoint,_pipe->fr+0)+_mode_overhead);
if(mo.uncoded_ac_ssd<=cost){
/*Taking macroblock overhead into account, it is not worth coding this
MB.*/
oc_enc_tokenlog_rollback(_enc,stack,stackptr-stack);
*(_pipe->fr+0)=*&fr_checkpoint;
*(_pipe->qs+0)=*&qs_checkpoint;
for(bi=0;bi<4;bi++){
fragi=sb_maps[_mbi>>2][_mbi&3][bi];
if(frags[fragi].coded){
*(uncoded_fragis-++nuncoded_fragis)=fragi;
frags[fragi].coded=0;
}
oc_fr_skip_block(_pipe->fr+0);
}
ncoded_fragis-=ncoded;
ncoded=0;
}
}
/*If no luma blocks coded, the mode is forced.*/
if(ncoded==0)mb_modes[_mbi]=OC_MODE_INTER_NOMV;
/*Assume that a 1MV with a single coded block is always cheaper than a 4MV
with a single coded block.
This may not be strictly true: a 4MV computes chroma MVs using (0,0) for
skipped blocks, while a 1MV does not.*/
else if(ncoded==1&&mb_mode==OC_MODE_INTER_MV_FOUR){
mb_modes[_mbi]=OC_MODE_INTER_MV;
}
}
_pipe->ncoded_fragis[0]=ncoded_fragis;
_pipe->nuncoded_fragis[0]=nuncoded_fragis;
return ncoded;
}
static void oc_enc_sb_transform_quantize_chroma(oc_enc_ctx *_enc,
oc_enc_pipeline_state *_pipe,int _pli,int _sbi_start,int _sbi_end){
const oc_sb_map *sb_maps;
oc_sb_flags *sb_flags;
ptrdiff_t *coded_fragis;
ptrdiff_t ncoded_fragis;
ptrdiff_t *uncoded_fragis;
ptrdiff_t nuncoded_fragis;
int sbi;
sb_maps=(const oc_sb_map *)_enc->state.sb_maps;
sb_flags=_enc->state.sb_flags;
coded_fragis=_pipe->coded_fragis[_pli];
ncoded_fragis=_pipe->ncoded_fragis[_pli];
uncoded_fragis=_pipe->uncoded_fragis[_pli];
nuncoded_fragis=_pipe->nuncoded_fragis[_pli];
for(sbi=_sbi_start;sbi<_sbi_end;sbi++){
/*Worst case token stack usage for 1 fragment.*/
oc_token_checkpoint stack[64];
oc_rd_metric mo;
int quadi;
int bi;
memset(&mo,0,sizeof(mo));
for(quadi=0;quadi<4;quadi++)for(bi=0;bi<4;bi++){
ptrdiff_t fragi;
fragi=sb_maps[sbi][quadi][bi];
if(fragi>=0){
oc_token_checkpoint *stackptr;
stackptr=stack;
if(oc_enc_block_transform_quantize(_enc,
_pipe,_pli,fragi,oc_fr_cost1(_pipe->fr+_pli),&mo,&stackptr)){
coded_fragis[ncoded_fragis++]=fragi;
oc_fr_code_block(_pipe->fr+_pli);
}
else{
*(uncoded_fragis-++nuncoded_fragis)=fragi;
oc_fr_skip_block(_pipe->fr+_pli);
}
}
}
oc_fr_state_flush_sb(_pipe->fr+_pli);
sb_flags[sbi].coded_fully=_pipe->fr[_pli].sb_full;
sb_flags[sbi].coded_partially=_pipe->fr[_pli].sb_partial;
}
_pipe->ncoded_fragis[_pli]=ncoded_fragis;
_pipe->nuncoded_fragis[_pli]=nuncoded_fragis;
}
/*Mode decision is done by exhaustively examining all potential choices.
Obviously, doing the motion compensation, fDCT, tokenization, and then
counting the bits each token uses is computationally expensive.
Theora's EOB runs can also split the cost of these tokens across multiple
fragments, and naturally we don't know what the optimal choice of Huffman
codes will be until we know all the tokens we're going to encode in all the
fragments.
So we use a simple approach to estimating the bit cost and distortion of each
mode based upon the SATD value of the residual before coding.
The mathematics behind the technique are outlined by Kim \cite{Kim03}, but
the process (modified somewhat from that of the paper) is very simple.
We build a non-linear regression of the mappings from
(pre-transform+quantization) SATD to (post-transform+quantization) bits and
SSD for each qi.
A separate set of mappings is kept for each quantization type and color
plane.
The mappings are constructed by partitioning the SATD values into a small
number of bins (currently 24) and using a linear regression in each bin
(as opposed to the 0th-order regression used by Kim).
The bit counts and SSD measurements are obtained by examining actual encoded
frames, with appropriate lambda values and optimal Huffman codes selected.
EOB bits are assigned to the fragment that started the EOB run (as opposed to
dividing them among all the blocks in the run; though the latter approach
seems more theoretically correct, Monty's testing showed a small improvement
with the former, though that may have been merely statistical noise).
@ARTICLE{Kim03,
author="Hyun Mun Kim",
title="Adaptive Rate Control Using Nonlinear Regression",
journal="IEEE Transactions on Circuits and Systems for Video Technology",
volume=13,
number=5,
pages="432--439",
month=May,
year=2003
}*/
/*Computes (_ssd+_lambda*_rate)/(1<<OC_BIT_SCALE) with rounding, avoiding
overflow for large lambda values.*/
#define OC_MODE_RD_COST(_ssd,_rate,_lambda) \
((_ssd)>>OC_BIT_SCALE)+((_rate)>>OC_BIT_SCALE)*(_lambda) \
+(((_ssd)&(1<<OC_BIT_SCALE)-1)+((_rate)&(1<<OC_BIT_SCALE)-1)*(_lambda) \
+((1<<OC_BIT_SCALE)>>1)>>OC_BIT_SCALE)
/*Estimate the R-D cost of the DCT coefficients given the SATD of a block after
prediction.*/
static unsigned oc_dct_cost2(unsigned *_ssd,
int _qi,int _pli,int _qti,int _satd){
unsigned rmse;
int bin;
int dx;
int y0;
int z0;
int dy;
int dz;
/*SATD metrics for chroma planes vary much less than luma, so we scale them
by 4 to distribute them into the mode decision bins more evenly.*/
_satd<<=_pli+1&2;
bin=OC_MINI(_satd>>OC_SAD_SHIFT,OC_SAD_BINS-2);
dx=_satd-(bin<<OC_SAD_SHIFT);
y0=OC_MODE_RD[_qi][_pli][_qti][bin].rate;
z0=OC_MODE_RD[_qi][_pli][_qti][bin].rmse;
dy=OC_MODE_RD[_qi][_pli][_qti][bin+1].rate-y0;
dz=OC_MODE_RD[_qi][_pli][_qti][bin+1].rmse-z0;
rmse=OC_MAXI(z0+(dz*dx>>OC_SAD_SHIFT),0);
*_ssd=rmse*rmse>>2*OC_RMSE_SCALE-OC_BIT_SCALE;
return OC_MAXI(y0+(dy*dx>>OC_SAD_SHIFT),0);
}
/*Select luma block-level quantizers for a MB in an INTRA frame.*/
static unsigned oc_analyze_intra_mb_luma(oc_enc_ctx *_enc,
const oc_qii_state *_qs,unsigned _mbi){
const unsigned char *src;
const ptrdiff_t *frag_buf_offs;
const oc_sb_map *sb_maps;
oc_fragment *frags;
ptrdiff_t frag_offs;
ptrdiff_t fragi;
oc_qii_state qs[4][3];
unsigned cost[4][3];
unsigned ssd[4][3];
unsigned rate[4][3];
int prev[3][3];
unsigned satd;
unsigned best_cost;
unsigned best_ssd;
unsigned best_rate;
int best_qii;
int qii;
int lambda;
int ystride;
int nqis;
int bi;
frag_buf_offs=_enc->state.frag_buf_offs;
sb_maps=(const oc_sb_map *)_enc->state.sb_maps;
src=_enc->state.ref_frame_data[OC_FRAME_IO];
ystride=_enc->state.ref_ystride[0];
fragi=sb_maps[_mbi>>2][_mbi&3][0];
frag_offs=frag_buf_offs[fragi];
satd=oc_enc_frag_intra_satd(_enc,src+frag_offs,ystride);
nqis=_enc->state.nqis;
lambda=_enc->lambda;
for(qii=0;qii<nqis;qii++){
oc_qii_state_advance(qs[0]+qii,_qs,qii);
rate[0][qii]=oc_dct_cost2(ssd[0]+qii,_enc->state.qis[qii],0,0,satd)
+(qs[0][qii].bits-_qs->bits<<OC_BIT_SCALE);
cost[0][qii]=OC_MODE_RD_COST(ssd[0][qii],rate[0][qii],lambda);
}
for(bi=1;bi<4;bi++){
fragi=sb_maps[_mbi>>2][_mbi&3][bi];
frag_offs=frag_buf_offs[fragi];
satd=oc_enc_frag_intra_satd(_enc,src+frag_offs,ystride);
for(qii=0;qii<nqis;qii++){
oc_qii_state qt[3];
unsigned cur_ssd;
unsigned cur_rate;
int best_qij;
int qij;
oc_qii_state_advance(qt+0,qs[bi-1]+0,qii);
cur_rate=oc_dct_cost2(&cur_ssd,_enc->state.qis[qii],0,0,satd);
best_ssd=ssd[bi-1][0]+cur_ssd;
best_rate=rate[bi-1][0]+cur_rate
+(qt[0].bits-qs[bi-1][0].bits<<OC_BIT_SCALE);
best_cost=OC_MODE_RD_COST(best_ssd,best_rate,lambda);
best_qij=0;
for(qij=1;qij<nqis;qij++){
unsigned chain_ssd;
unsigned chain_rate;
unsigned chain_cost;
oc_qii_state_advance(qt+qij,qs[bi-1]+qij,qii);
chain_ssd=ssd[bi-1][qij]+cur_ssd;
chain_rate=rate[bi-1][qij]+cur_rate
+(qt[qij].bits-qs[bi-1][qij].bits<<OC_BIT_SCALE);
chain_cost=OC_MODE_RD_COST(chain_ssd,chain_rate,lambda);
if(chain_cost<best_cost){
best_cost=chain_cost;
best_ssd=chain_ssd;
best_rate=chain_rate;
best_qij=qij;
}
}
*(qs[bi]+qii)=*(qt+best_qij);
cost[bi][qii]=best_cost;
ssd[bi][qii]=best_ssd;
rate[bi][qii]=best_rate;
prev[bi-1][qii]=best_qij;
}
}
best_qii=0;
best_cost=cost[3][0];
for(qii=1;qii<nqis;qii++){
if(cost[3][qii]<best_cost){
best_cost=cost[3][qii];
best_qii=qii;
}
}
frags=_enc->state.frags;
for(bi=3;;){
fragi=sb_maps[_mbi>>2][_mbi&3][bi];
frags[fragi].qii=best_qii;
if(bi--<=0)break;
best_qii=prev[bi][best_qii];
}
return best_cost;
}
/*Select a block-level quantizer for a single chroma block in an INTRA frame.*/
static unsigned oc_analyze_intra_chroma_block(oc_enc_ctx *_enc,
const oc_qii_state *_qs,int _pli,ptrdiff_t _fragi){
const unsigned char *src;
oc_fragment *frags;
ptrdiff_t frag_offs;
oc_qii_state qt[3];
unsigned cost[3];
unsigned satd;
unsigned best_cost;
int best_qii;
int qii;
int lambda;
int ystride;
int nqis;
src=_enc->state.ref_frame_data[OC_FRAME_IO];
ystride=_enc->state.ref_ystride[_pli];
frag_offs=_enc->state.frag_buf_offs[_fragi];
satd=oc_enc_frag_intra_satd(_enc,src+frag_offs,ystride);
nqis=_enc->state.nqis;
lambda=_enc->lambda;
best_qii=0;
for(qii=0;qii<nqis;qii++){
unsigned cur_rate;
unsigned cur_ssd;
oc_qii_state_advance(qt+qii,_qs,qii);
cur_rate=oc_dct_cost2(&cur_ssd,_enc->state.qis[qii],_pli,0,satd)
+(qt[qii].bits-_qs->bits<<OC_BIT_SCALE);
cost[qii]=OC_MODE_RD_COST(cur_ssd,cur_rate,lambda);
}
best_cost=cost[0];
for(qii=1;qii<nqis;qii++){
if(cost[qii]<best_cost){
best_cost=cost[qii];
best_qii=qii;
}
}
frags=_enc->state.frags;
frags[_fragi].qii=best_qii;
return best_cost;
}
static void oc_enc_sb_transform_quantize_intra_chroma(oc_enc_ctx *_enc,
oc_enc_pipeline_state *_pipe,int _pli,int _sbi_start,int _sbi_end){
const oc_sb_map *sb_maps;
oc_sb_flags *sb_flags;
ptrdiff_t *coded_fragis;
ptrdiff_t ncoded_fragis;
int sbi;
sb_maps=(const oc_sb_map *)_enc->state.sb_maps;
sb_flags=_enc->state.sb_flags;
coded_fragis=_pipe->coded_fragis[_pli];
ncoded_fragis=_pipe->ncoded_fragis[_pli];
for(sbi=_sbi_start;sbi<_sbi_end;sbi++){
/*Worst case token stack usage for 1 fragment.*/
oc_token_checkpoint stack[64];
int quadi;
int bi;
for(quadi=0;quadi<4;quadi++)for(bi=0;bi<4;bi++){
ptrdiff_t fragi;
fragi=sb_maps[sbi][quadi][bi];
if(fragi>=0){
oc_token_checkpoint *stackptr;
oc_analyze_intra_chroma_block(_enc,_pipe->qs+_pli,_pli,fragi);
stackptr=stack;
oc_enc_block_transform_quantize(_enc,
_pipe,_pli,fragi,0,NULL,&stackptr);
coded_fragis[ncoded_fragis++]=fragi;
}
}
}
_pipe->ncoded_fragis[_pli]=ncoded_fragis;
}
/*Analysis stage for an INTRA frame.*/
void oc_enc_analyze_intra(oc_enc_ctx *_enc,int _recode){
oc_enc_pipeline_state pipe;
const unsigned char *map_idxs;
int nmap_idxs;
oc_sb_flags *sb_flags;
signed char *mb_modes;
const oc_mb_map *mb_maps;
oc_mb_enc_info *embs;
oc_fragment *frags;
unsigned stripe_sby;
unsigned mcu_nvsbs;
int notstart;
int notdone;
int refi;
int pli;
_enc->state.frame_type=OC_INTRA_FRAME;
oc_enc_tokenize_start(_enc);
oc_enc_pipeline_init(_enc,&pipe);
/*Choose MVs and MB modes and quantize and code luma.
Must be done in Hilbert order.*/
map_idxs=OC_MB_MAP_IDXS[_enc->state.info.pixel_fmt];
nmap_idxs=OC_MB_MAP_NIDXS[_enc->state.info.pixel_fmt];
_enc->state.ncoded_fragis[0]=0;
_enc->state.ncoded_fragis[1]=0;
_enc->state.ncoded_fragis[2]=0;
sb_flags=_enc->state.sb_flags;
mb_modes=_enc->state.mb_modes;
mb_maps=(const oc_mb_map *)_enc->state.mb_maps;
embs=_enc->mb_info;
frags=_enc->state.frags;
notstart=0;
notdone=1;
mcu_nvsbs=_enc->mcu_nvsbs;
for(stripe_sby=0;notdone;stripe_sby+=mcu_nvsbs){
unsigned sbi;
unsigned sbi_end;
notdone=oc_enc_pipeline_set_stripe(_enc,&pipe,stripe_sby);
sbi_end=pipe.sbi_end[0];
for(sbi=pipe.sbi0[0];sbi<sbi_end;sbi++){
int quadi;
/*Mode addressing is through Y plane, always 4 MB per SB.*/
for(quadi=0;quadi<4;quadi++)if(sb_flags[sbi].quad_valid&1<<quadi){
unsigned mbi;
int mapii;
int mapi;
int bi;
ptrdiff_t fragi;
mbi=sbi<<2|quadi;
/*Motion estimation:
We always do a basic 1MV search for all macroblocks, coded or not,
keyframe or not.*/
if(!_recode&&_enc->state.curframe_num>0)oc_mcenc_search(_enc,mbi);
oc_analyze_intra_mb_luma(_enc,pipe.qs+0,mbi);
mb_modes[mbi]=OC_MODE_INTRA;
oc_enc_mb_transform_quantize_luma(_enc,&pipe,mbi,0);
/*Propagate final MB mode and MVs to the chroma blocks.*/
for(mapii=4;mapii<nmap_idxs;mapii++){
mapi=map_idxs[mapii];
pli=mapi>>2;
bi=mapi&3;
fragi=mb_maps[mbi][pli][bi];
frags[fragi].mb_mode=OC_MODE_INTRA;
}
}
}
oc_enc_pipeline_finish_mcu_plane(_enc,&pipe,0,notstart,notdone);
/*Code chroma planes.*/
for(pli=1;pli<3;pli++){
oc_enc_sb_transform_quantize_intra_chroma(_enc,&pipe,
pli,pipe.sbi0[pli],pipe.sbi_end[pli]);
oc_enc_pipeline_finish_mcu_plane(_enc,&pipe,pli,notstart,notdone);
}
notstart=1;
}
/*Finish filling in the reference frame borders.*/
refi=_enc->state.ref_frame_idx[OC_FRAME_SELF];
for(pli=0;pli<3;pli++)oc_state_borders_fill_caps(&_enc->state,refi,pli);
_enc->state.ntotal_coded_fragis=_enc->state.nfrags;
}
/*Cost information about a MB mode.*/
struct oc_mode_choice{
unsigned cost;
unsigned ssd;
unsigned rate;
unsigned overhead;
unsigned char qii[12];
};
static void oc_mode_set_cost(oc_mode_choice *_modec,int _lambda){
_modec->cost=OC_MODE_RD_COST(_modec->ssd,
_modec->rate+_modec->overhead,_lambda);
}
/*A set of skip SSD's to use to disable early skipping.*/
static const unsigned OC_NOSKIP[12]={
UINT_MAX,UINT_MAX,UINT_MAX,UINT_MAX,
UINT_MAX,UINT_MAX,UINT_MAX,UINT_MAX,
UINT_MAX,UINT_MAX,UINT_MAX,UINT_MAX
};
/*The estimated number of bits used by a coded chroma block to specify the AC
quantizer.
TODO: Currently this is just 0.5*log2(3) (estimating about 50% compression);
measurements suggest this is in the right ballpark, but it varies somewhat
with lambda.*/
#define OC_CHROMA_QII_RATE ((0xCAE00D1DU>>31-OC_BIT_SCALE)+1>>1)
static void oc_analyze_mb_mode_luma(oc_enc_ctx *_enc,
oc_mode_choice *_modec,const oc_fr_state *_fr,const oc_qii_state *_qs,
const unsigned _frag_satd[12],const unsigned _skip_ssd[12],int _qti){
oc_fr_state fr;
oc_qii_state qs;
unsigned ssd;
unsigned rate;
int overhead;
unsigned satd;
unsigned best_ssd;
unsigned best_rate;
int best_overhead;
int best_fri;
int best_qii;
unsigned cur_cost;
unsigned cur_ssd;
unsigned cur_rate;
int cur_overhead;
int lambda;
int nqis;
int nskipped;
int bi;
int qii;
lambda=_enc->lambda;
nqis=_enc->state.nqis;
/*We could do a trellis optimization here, but we don't make final skip
decisions until after transform+quantization, so the result wouldn't be
optimal anyway.
Instead we just use a greedy approach; for most SATD values, the
differences between the qiis are large enough to drown out the cost to
code the flags, anyway.*/
*&fr=*_fr;
*&qs=*_qs;
ssd=rate=overhead=nskipped=0;
for(bi=0;bi<4;bi++){
oc_fr_state ft[2];
oc_qii_state qt[3];
unsigned best_cost;
satd=_frag_satd[bi];
*(ft+0)=*&fr;
oc_fr_code_block(ft+0);
oc_qii_state_advance(qt+0,&qs,0);
best_overhead=(ft[0].bits-fr.bits<<OC_BIT_SCALE);
best_rate=oc_dct_cost2(&best_ssd,_enc->state.qis[0],0,_qti,satd)
+(qt[0].bits-qs.bits<<OC_BIT_SCALE);
best_cost=OC_MODE_RD_COST(ssd+best_ssd,rate+best_rate+best_overhead,lambda);
best_fri=0;
best_qii=0;
for(qii=1;qii<nqis;qii++){
oc_qii_state_advance(qt+qii,&qs,qii);
cur_rate=oc_dct_cost2(&cur_ssd,_enc->state.qis[qii],0,_qti,satd)
+(qt[qii].bits-qs.bits<<OC_BIT_SCALE);
cur_cost=OC_MODE_RD_COST(ssd+cur_ssd,rate+cur_rate+best_overhead,lambda);
if(cur_cost<best_cost){
best_cost=cur_cost;
best_ssd=cur_ssd;
best_rate=cur_rate;
best_qii=qii;
}
}
if(_skip_ssd[bi]<UINT_MAX&&nskipped<3){
*(ft+1)=*&fr;
oc_fr_skip_block(ft+1);
cur_overhead=ft[1].bits-fr.bits<<OC_BIT_SCALE;
cur_ssd=_skip_ssd[bi]<<OC_BIT_SCALE;
cur_cost=OC_MODE_RD_COST(ssd+cur_ssd,rate+cur_overhead,lambda);
if(cur_cost<=best_cost){
best_ssd=cur_ssd;
best_rate=0;
best_overhead=cur_overhead;
best_fri=1;
best_qii+=4;
}
}
rate+=best_rate;
ssd+=best_ssd;
overhead+=best_overhead;
*&fr=*(ft+best_fri);
if(best_fri==0)*&qs=*(qt+best_qii);
else nskipped++;
_modec->qii[bi]=best_qii;
}
_modec->ssd=ssd;
_modec->rate=rate;
_modec->overhead=OC_MAXI(overhead,0);
}
static void oc_analyze_mb_mode_chroma(oc_enc_ctx *_enc,
oc_mode_choice *_modec,const oc_fr_state *_fr,const oc_qii_state *_qs,
const unsigned _frag_satd[12],const unsigned _skip_ssd[12],int _qti){
unsigned ssd;
unsigned rate;
unsigned satd;
unsigned best_ssd;
unsigned best_rate;
int best_qii;
unsigned cur_cost;
unsigned cur_ssd;
unsigned cur_rate;
int lambda;
int nblocks;
int nqis;
int pli;
int bi;
int qii;
lambda=_enc->lambda;
nqis=_enc->state.nqis;
ssd=_modec->ssd;
rate=_modec->rate;
/*Because (except in 4:4:4 mode) we aren't considering chroma blocks in coded
order, we assume a constant overhead for coded block and qii flags.*/
nblocks=OC_MB_MAP_NIDXS[_enc->state.info.pixel_fmt];
nblocks=(nblocks-4>>1)+4;
bi=4;
for(pli=1;pli<3;pli++){
for(;bi<nblocks;bi++){
unsigned best_cost;
satd=_frag_satd[bi];
best_rate=oc_dct_cost2(&best_ssd,_enc->state.qis[0],pli,_qti,satd)
+OC_CHROMA_QII_RATE;
best_cost=OC_MODE_RD_COST(ssd+best_ssd,rate+best_rate,lambda);
best_qii=0;
for(qii=1;qii<nqis;qii++){
cur_rate=oc_dct_cost2(&cur_ssd,_enc->state.qis[qii],0,_qti,satd)
+OC_CHROMA_QII_RATE;
cur_cost=OC_MODE_RD_COST(ssd+cur_ssd,rate+cur_rate,lambda);
if(cur_cost<best_cost){
best_cost=cur_cost;
best_ssd=cur_ssd;
best_rate=cur_rate;
best_qii=qii;
}
}
if(_skip_ssd[bi]<UINT_MAX){
cur_ssd=_skip_ssd[bi]<<OC_BIT_SCALE;
cur_cost=OC_MODE_RD_COST(ssd+cur_ssd,rate,lambda);
if(cur_cost<=best_cost){
best_ssd=cur_ssd;
best_rate=0;
best_qii+=4;
}
}
rate+=best_rate;
ssd+=best_ssd;
_modec->qii[bi]=best_qii;
}
nblocks=(nblocks-4<<1)+4;
}
_modec->ssd=ssd;
_modec->rate=rate;
}
static void oc_skip_cost(oc_enc_ctx *_enc,oc_enc_pipeline_state *_pipe,
unsigned _mbi,unsigned _ssd[12]){
OC_ALIGN16(ogg_int16_t buffer[64]);
const unsigned char *src;
const unsigned char *ref;
int ystride;
const oc_fragment *frags;
const ptrdiff_t *frag_buf_offs;
const ptrdiff_t *sb_map;
const oc_mb_map_plane *mb_map;
const unsigned char *map_idxs;
int map_nidxs;
ogg_int64_t mask;
unsigned uncoded_ssd;
int uncoded_dc;
unsigned dc_dequant;
int dc_flag;
int mapii;
int mapi;
int pli;
int bi;
ptrdiff_t fragi;
ptrdiff_t frag_offs;
int borderi;
int pi;
src=_enc->state.ref_frame_data[OC_FRAME_IO];
ref=_enc->state.ref_frame_data[_enc->state.ref_frame_idx[OC_FRAME_PREV]];
ystride=_enc->state.ref_ystride[0];
frags=_enc->state.frags;
frag_buf_offs=_enc->state.frag_buf_offs;
sb_map=_enc->state.sb_maps[_mbi>>2][_mbi&3];
dc_dequant=_enc->state.dequant_tables[_enc->state.qis[0]][0][1][0];
for(bi=0;bi<4;bi++){
fragi=sb_map[bi];
frag_offs=frag_buf_offs[fragi];
oc_enc_frag_sub(_enc,buffer,src+frag_offs,ref+frag_offs,ystride);
borderi=frags[fragi].borderi;
uncoded_ssd=uncoded_dc=0;
if(borderi<0){
for(pi=0;pi<64;pi++){
uncoded_ssd+=buffer[pi]*buffer[pi];
uncoded_dc+=buffer[pi];
}
}
else{
ogg_int64_t mask;
mask=_enc->state.borders[borderi].mask;
for(pi=0;pi<64;pi++,mask>>=1)if(mask&1){
uncoded_ssd+=buffer[pi]*buffer[pi];
uncoded_dc+=buffer[pi];
}
}
/*Scale to match DCT domain.*/
uncoded_ssd<<=4;
/*We actually only want the AC contribution to the SSD.*/
uncoded_ssd-=uncoded_dc*uncoded_dc>>2;
/*DC is a special case; if there's more than a full-quantizer improvement
in the effective DC component, always force-code the block.*/
dc_flag=abs(uncoded_dc)>dc_dequant<<1;
uncoded_ssd|=-dc_flag;
_pipe->skip_ssd[0][fragi-_pipe->froffset[0]]=_ssd[bi]=uncoded_ssd;
}
mb_map=(const oc_mb_map_plane *)_enc->state.mb_maps[_mbi];
map_nidxs=OC_MB_MAP_NIDXS[_enc->state.info.pixel_fmt];
map_idxs=OC_MB_MAP_IDXS[_enc->state.info.pixel_fmt];
map_nidxs=(map_nidxs-4>>1)+4;
mapii=4;
for(pli=1;pli<3;pli++){
ystride=_enc->state.ref_ystride[pli];
dc_dequant=_enc->state.dequant_tables[_enc->state.qis[0]][pli][1][0];
for(;mapii<map_nidxs;mapii++){
mapi=map_idxs[mapii];
bi=mapi&3;
fragi=mb_map[pli][bi];
frag_offs=frag_buf_offs[fragi];
oc_enc_frag_sub(_enc,buffer,src+frag_offs,ref+frag_offs,ystride);
borderi=frags[fragi].borderi;
uncoded_ssd=uncoded_dc=0;
if(borderi<0){
for(pi=0;pi<64;pi++){
uncoded_ssd+=buffer[pi]*buffer[pi];
uncoded_dc+=buffer[pi];
}
}
else{
mask=_enc->state.borders[borderi].mask;
for(pi=0;pi<64;pi++,mask>>=1)if(mask&1){
uncoded_ssd+=buffer[pi]*buffer[pi];
uncoded_dc+=buffer[pi];
}
}
/*Scale to match DCT domain.*/
uncoded_ssd<<=4;
/*We actually only want the AC contribution to the SSD.*/
uncoded_ssd-=uncoded_dc*uncoded_dc>>2;
/*DC is a special case; if there's more than a full-quantizer improvement
in the effective DC component, always force-code the block.*/
dc_flag=abs(uncoded_dc)>dc_dequant<<1;
uncoded_ssd|=-dc_flag;
_pipe->skip_ssd[pli][fragi-_pipe->froffset[pli]]=_ssd[mapii]=uncoded_ssd;
}
map_nidxs=(map_nidxs-4<<1)+4;
}
}
static void oc_mb_intra_satd(oc_enc_ctx *_enc,unsigned _mbi,
unsigned _frag_satd[12]){
const unsigned char *src;
const ptrdiff_t *frag_buf_offs;
const ptrdiff_t *sb_map;
const oc_mb_map_plane *mb_map;
const unsigned char *map_idxs;
int map_nidxs;
int mapii;
int mapi;
int ystride;
int pli;
int bi;
ptrdiff_t fragi;
ptrdiff_t frag_offs;
frag_buf_offs=_enc->state.frag_buf_offs;
sb_map=_enc->state.sb_maps[_mbi>>2][_mbi&3];
src=_enc->state.ref_frame_data[OC_FRAME_IO];
ystride=_enc->state.ref_ystride[0];
for(bi=0;bi<4;bi++){
fragi=sb_map[bi];
frag_offs=frag_buf_offs[fragi];
_frag_satd[bi]=oc_enc_frag_intra_satd(_enc,src+frag_offs,ystride);
}
mb_map=(const oc_mb_map_plane *)_enc->state.mb_maps[_mbi];
map_idxs=OC_MB_MAP_IDXS[_enc->state.info.pixel_fmt];
map_nidxs=OC_MB_MAP_NIDXS[_enc->state.info.pixel_fmt];
/*Note: This assumes ref_ystride[1]==ref_ystride[2].*/
ystride=_enc->state.ref_ystride[1];
for(mapii=4;mapii<map_nidxs;mapii++){
mapi=map_idxs[mapii];
pli=mapi>>2;
bi=mapi&3;
fragi=mb_map[pli][bi];
frag_offs=frag_buf_offs[fragi];
_frag_satd[mapii]=oc_enc_frag_intra_satd(_enc,src+frag_offs,ystride);
}
}
static void oc_cost_intra(oc_enc_ctx *_enc,oc_mode_choice *_modec,
unsigned _mbi,const oc_fr_state *_fr,const oc_qii_state *_qs,
const unsigned _frag_satd[12],const unsigned _skip_ssd[12]){
oc_analyze_mb_mode_luma(_enc,_modec,_fr,_qs,_frag_satd,_skip_ssd,0);
oc_analyze_mb_mode_chroma(_enc,_modec,_fr,_qs,_frag_satd,_skip_ssd,0);
_modec->overhead+=
oc_mode_scheme_chooser_cost(&_enc->chooser,OC_MODE_INTRA)<<OC_BIT_SCALE;
oc_mode_set_cost(_modec,_enc->lambda);
}
static void oc_cost_inter(oc_enc_ctx *_enc,oc_mode_choice *_modec,
unsigned _mbi,int _mb_mode,const signed char *_mv,
const oc_fr_state *_fr,const oc_qii_state *_qs,const unsigned _skip_ssd[12]){
unsigned frag_satd[12];
const unsigned char *src;
const unsigned char *ref;
int ystride;
const ptrdiff_t *frag_buf_offs;
const ptrdiff_t *sb_map;
const oc_mb_map_plane *mb_map;
const unsigned char *map_idxs;
int map_nidxs;
int mapii;
int mapi;
int mv_offs[2];
int dx;
int dy;
int pli;
int bi;
ptrdiff_t fragi;
ptrdiff_t frag_offs;
src=_enc->state.ref_frame_data[OC_FRAME_IO];
ref=_enc->state.ref_frame_data[
_enc->state.ref_frame_idx[OC_FRAME_FOR_MODE(_mb_mode)]];
ystride=_enc->state.ref_ystride[0];
frag_buf_offs=_enc->state.frag_buf_offs;
sb_map=_enc->state.sb_maps[_mbi>>2][_mbi&3];
dx=_mv[0];
dy=_mv[1];
_modec->rate=_modec->ssd=0;
if(oc_state_get_mv_offsets(&_enc->state,mv_offs,0,dx,dy)>1){
for(bi=0;bi<4;bi++){
fragi=sb_map[bi];
frag_offs=frag_buf_offs[fragi];
frag_satd[bi]=oc_enc_frag_satd2_thresh(_enc,src+frag_offs,
ref+frag_offs+mv_offs[0],ref+frag_offs+mv_offs[1],ystride,UINT_MAX);
}
}
else{
for(bi=0;bi<4;bi++){
fragi=sb_map[bi];
frag_offs=frag_buf_offs[fragi];
frag_satd[bi]=oc_enc_frag_satd_thresh(_enc,src+frag_offs,
ref+frag_offs+mv_offs[0],ystride,UINT_MAX);
}
}
mb_map=(const oc_mb_map_plane *)_enc->state.mb_maps[_mbi];
map_idxs=OC_MB_MAP_IDXS[_enc->state.info.pixel_fmt];
map_nidxs=OC_MB_MAP_NIDXS[_enc->state.info.pixel_fmt];
/*Note: This assumes ref_ystride[1]==ref_ystride[2].*/
ystride=_enc->state.ref_ystride[1];
if(oc_state_get_mv_offsets(&_enc->state,mv_offs,1,dx,dy)>1){
for(mapii=4;mapii<map_nidxs;mapii++){
mapi=map_idxs[mapii];
pli=mapi>>2;
bi=mapi&3;
fragi=mb_map[pli][bi];
frag_offs=frag_buf_offs[fragi];
frag_satd[mapii]=oc_enc_frag_satd2_thresh(_enc,src+frag_offs,
ref+frag_offs+mv_offs[0],ref+frag_offs+mv_offs[1],ystride,UINT_MAX);
}
}
else{
for(mapii=4;mapii<map_nidxs;mapii++){
mapi=map_idxs[mapii];
pli=mapi>>2;
bi=mapi&3;
fragi=mb_map[pli][bi];
frag_offs=frag_buf_offs[fragi];
frag_satd[mapii]=oc_enc_frag_satd_thresh(_enc,src+frag_offs,
ref+frag_offs+mv_offs[0],ystride,UINT_MAX);
}
}
oc_analyze_mb_mode_luma(_enc,_modec,_fr,_qs,frag_satd,_skip_ssd,1);
oc_analyze_mb_mode_chroma(_enc,_modec,_fr,_qs,frag_satd,_skip_ssd,1);
_modec->overhead+=
oc_mode_scheme_chooser_cost(&_enc->chooser,_mb_mode)<<OC_BIT_SCALE;
oc_mode_set_cost(_modec,_enc->lambda);
}
static void oc_cost_inter_nomv(oc_enc_ctx *_enc,oc_mode_choice *_modec,
unsigned _mbi,int _mb_mode,const oc_fr_state *_fr,const oc_qii_state *_qs,
const unsigned _skip_ssd[12]){
static const oc_mv OC_MV_ZERO;
oc_cost_inter(_enc,_modec,_mbi,_mb_mode,OC_MV_ZERO,_fr,_qs,_skip_ssd);
}
static int oc_cost_inter1mv(oc_enc_ctx *_enc,oc_mode_choice *_modec,
unsigned _mbi,int _mb_mode,const signed char *_mv,
const oc_fr_state *_fr,const oc_qii_state *_qs,const unsigned _skip_ssd[12]){
int bits0;
oc_cost_inter(_enc,_modec,_mbi,_mb_mode,_mv,_fr,_qs,_skip_ssd);
bits0=OC_MV_BITS[0][_mv[0]+31]+OC_MV_BITS[0][_mv[1]+31];
_modec->overhead+=OC_MINI(_enc->mv_bits[0]+bits0,_enc->mv_bits[1]+12)
-OC_MINI(_enc->mv_bits[0],_enc->mv_bits[1])<<OC_BIT_SCALE;
oc_mode_set_cost(_modec,_enc->lambda);
return bits0;
}
/*A mapping from oc_mb_map (raster) ordering to oc_sb_map (Hilbert) ordering.*/
static const unsigned char OC_MB_PHASE[4][4]={
{0,1,3,2},{0,3,1,2},{0,3,1,2},{2,3,1,0}
};
static void oc_cost_inter4mv(oc_enc_ctx *_enc,oc_mode_choice *_modec,
unsigned _mbi,oc_mv _mv[4],const oc_fr_state *_fr,const oc_qii_state *_qs,
const unsigned _skip_ssd[12]){
unsigned frag_satd[12];
oc_mv lbmvs[4];
oc_mv cbmvs[4];
const unsigned char *src;
const unsigned char *ref;
int ystride;
const ptrdiff_t *frag_buf_offs;
oc_mv *frag_mvs;
const oc_mb_map_plane *mb_map;
const unsigned char *map_idxs;
int map_nidxs;
int nqis;
int mapii;
int mapi;
int mv_offs[2];
int dx;
int dy;
int pli;
int bi;
ptrdiff_t fragi;
ptrdiff_t frag_offs;
int bits0;
int bits1;
unsigned satd;
src=_enc->state.ref_frame_data[OC_FRAME_IO];
ref=_enc->state.ref_frame_data[_enc->state.ref_frame_idx[OC_FRAME_PREV]];
ystride=_enc->state.ref_ystride[0];
frag_buf_offs=_enc->state.frag_buf_offs;
frag_mvs=_enc->state.frag_mvs;
mb_map=(const oc_mb_map_plane *)_enc->state.mb_maps[_mbi];
_modec->rate=_modec->ssd=0;
for(bi=0;bi<4;bi++){
fragi=mb_map[0][bi];
dx=_mv[bi][0];
dy=_mv[bi][1];
/*Save the block MVs as the current ones while we're here; we'll replace
them if we don't ultimately choose 4MV mode.*/
frag_mvs[fragi][0]=(signed char)dx;
frag_mvs[fragi][1]=(signed char)dy;
frag_offs=frag_buf_offs[fragi];
if(oc_state_get_mv_offsets(&_enc->state,mv_offs,0,dx,dy)>1){
satd=oc_enc_frag_satd2_thresh(_enc,src+frag_offs,
ref+frag_offs+mv_offs[0],ref+frag_offs+mv_offs[1],ystride,UINT_MAX);
}
else{
satd=oc_enc_frag_satd_thresh(_enc,src+frag_offs,
ref+frag_offs+mv_offs[0],ystride,UINT_MAX);
}
frag_satd[OC_MB_PHASE[_mbi&3][bi]]=satd;
}
oc_analyze_mb_mode_luma(_enc,_modec,_fr,_qs,frag_satd,
_enc->vp3_compatible?OC_NOSKIP:_skip_ssd,1);
/*Figure out which blocks are being skipped and give them (0,0) MVs.*/
bits0=0;
bits1=0;
nqis=_enc->state.nqis;
for(bi=0;bi<4;bi++){
if(_modec->qii[OC_MB_PHASE[_mbi&3][bi]]>=nqis){
memset(lbmvs+bi,0,sizeof(*lbmvs));
}
else{
memcpy(lbmvs+bi,_mv+bi,sizeof(*lbmvs));
bits0+=OC_MV_BITS[0][_mv[bi][0]+31]+OC_MV_BITS[0][_mv[bi][1]+31];
bits1+=12;
}
}
(*OC_SET_CHROMA_MVS_TABLE[_enc->state.info.pixel_fmt])(cbmvs,
(const oc_mv *)lbmvs);
map_idxs=OC_MB_MAP_IDXS[_enc->state.info.pixel_fmt];
map_nidxs=OC_MB_MAP_NIDXS[_enc->state.info.pixel_fmt];
/*Note: This assumes ref_ystride[1]==ref_ystride[2].*/
ystride=_enc->state.ref_ystride[1];
for(mapii=4;mapii<map_nidxs;mapii++){
mapi=map_idxs[mapii];
pli=mapi>>2;
bi=mapi&3;
fragi=mb_map[pli][bi];
dx=cbmvs[bi][0];
dy=cbmvs[bi][1];
frag_offs=frag_buf_offs[fragi];
/*TODO: We could save half these calls by re-using the results for the Cb
and Cr planes; is it worth it?*/
if(oc_state_get_mv_offsets(&_enc->state,mv_offs,pli,dx,dy)>1){
satd=oc_enc_frag_satd2_thresh(_enc,src+frag_offs,
ref+frag_offs+mv_offs[0],ref+frag_offs+mv_offs[1],ystride,UINT_MAX);
}
else{
satd=oc_enc_frag_satd_thresh(_enc,src+frag_offs,
ref+frag_offs+mv_offs[0],ystride,UINT_MAX);
}
frag_satd[mapii]=satd;
}
oc_analyze_mb_mode_chroma(_enc,_modec,_fr,_qs,frag_satd,_skip_ssd,1);
_modec->overhead+=
oc_mode_scheme_chooser_cost(&_enc->chooser,OC_MODE_INTER_MV_FOUR)
+OC_MINI(_enc->mv_bits[0]+bits0,_enc->mv_bits[1]+bits1)
-OC_MINI(_enc->mv_bits[0],_enc->mv_bits[1])<<OC_BIT_SCALE;
oc_mode_set_cost(_modec,_enc->lambda);
}
int oc_enc_analyze_inter(oc_enc_ctx *_enc,int _allow_keyframe,int _recode){
oc_set_chroma_mvs_func set_chroma_mvs;
oc_enc_pipeline_state pipe;
oc_qii_state intra_luma_qs;
oc_mv last_mv;
oc_mv prior_mv;
ogg_int64_t interbits;
ogg_int64_t intrabits;
const unsigned char *map_idxs;
int nmap_idxs;
unsigned *coded_mbis;
unsigned *uncoded_mbis;
size_t ncoded_mbis;
size_t nuncoded_mbis;
oc_sb_flags *sb_flags;
signed char *mb_modes;
const oc_sb_map *sb_maps;
const oc_mb_map *mb_maps;
oc_mb_enc_info *embs;
oc_fragment *frags;
oc_mv *frag_mvs;
int qi;
unsigned stripe_sby;
unsigned mcu_nvsbs;
int notstart;
int notdone;
int vdec;
unsigned sbi;
unsigned sbi_end;
int refi;
int pli;
set_chroma_mvs=OC_SET_CHROMA_MVS_TABLE[_enc->state.info.pixel_fmt];
_enc->state.frame_type=OC_INTER_FRAME;
oc_mode_scheme_chooser_reset(&_enc->chooser);
oc_enc_tokenize_start(_enc);
oc_enc_pipeline_init(_enc,&pipe);
if(_allow_keyframe)oc_qii_state_init(&intra_luma_qs);
_enc->mv_bits[0]=_enc->mv_bits[1]=0;
interbits=intrabits=0;
last_mv[0]=last_mv[1]=prior_mv[0]=prior_mv[1]=0;
/*Choose MVs and MB modes and quantize and code luma.
Must be done in Hilbert order.*/
map_idxs=OC_MB_MAP_IDXS[_enc->state.info.pixel_fmt];
nmap_idxs=OC_MB_MAP_NIDXS[_enc->state.info.pixel_fmt];
qi=_enc->state.qis[0];
coded_mbis=_enc->coded_mbis;
uncoded_mbis=coded_mbis+_enc->state.nmbs;
ncoded_mbis=0;
nuncoded_mbis=0;
_enc->state.ncoded_fragis[0]=0;
_enc->state.ncoded_fragis[1]=0;
_enc->state.ncoded_fragis[2]=0;
sb_flags=_enc->state.sb_flags;
mb_modes=_enc->state.mb_modes;
sb_maps=(const oc_sb_map *)_enc->state.sb_maps;
mb_maps=(const oc_mb_map *)_enc->state.mb_maps;
embs=_enc->mb_info;
frags=_enc->state.frags;
frag_mvs=_enc->state.frag_mvs;
vdec=!(_enc->state.info.pixel_fmt&2);
notstart=0;
notdone=1;
mcu_nvsbs=_enc->mcu_nvsbs;
for(stripe_sby=0;notdone;stripe_sby+=mcu_nvsbs){
notdone=oc_enc_pipeline_set_stripe(_enc,&pipe,stripe_sby);
sbi_end=pipe.sbi_end[0];
for(sbi=pipe.sbi0[0];sbi<sbi_end;sbi++){
int quadi;
/*Mode addressing is through Y plane, always 4 MB per SB.*/
for(quadi=0;quadi<4;quadi++)if(sb_flags[sbi].quad_valid&1<<quadi){
oc_mode_choice modes[8];
unsigned skip_ssd[12];
unsigned intra_satd[12];
int mb_mv_bits_0;
int mb_gmv_bits_0;
int inter_mv_pref;
int mb_mode;
int dx;
int dy;
unsigned mbi;
int mapii;
int mapi;
int bi;
ptrdiff_t fragi;
mbi=sbi<<2|quadi;
/*Motion estimation:
We always do a basic 1MV search for all macroblocks, coded or not,
keyframe or not.*/
if(!_recode&&_enc->sp_level<OC_SP_LEVEL_NOMC)oc_mcenc_search(_enc,mbi);
dx=dy=0;
/*Find the block choice with the lowest estimated coding cost.
If a Cb or Cr block is coded but no Y' block from a macro block then
the mode MUST be OC_MODE_INTER_NOMV.
This is the default state to which the mode data structure is
initialised in encoder and decoder at the start of each frame.*/
/*Block coding cost is estimated from correlated SATD metrics.*/
/*At this point, all blocks that are in frame are still marked coded.*/
if(!_recode){
memcpy(embs[mbi].unref_mv,
embs[mbi].analysis_mv[0],sizeof(embs[mbi].unref_mv));
embs[mbi].refined=0;
}
oc_mb_intra_satd(_enc,mbi,intra_satd);
/*Estimate the cost of coding this MB in a keyframe.*/
if(_allow_keyframe){
oc_cost_intra(_enc,modes+OC_MODE_INTRA,mbi,
pipe.fr+0,&intra_luma_qs,intra_satd,OC_NOSKIP);
intrabits+=modes[OC_MODE_INTRA].rate;
for(bi=0;bi<4;bi++){
oc_qii_state_advance(&intra_luma_qs,&intra_luma_qs,
modes[OC_MODE_INTRA].qii[bi]);
}
}
/*Estimate the cost in a delta frame for various modes.*/
oc_skip_cost(_enc,&pipe,mbi,skip_ssd);
oc_cost_inter_nomv(_enc,modes+OC_MODE_INTER_NOMV,mbi,
OC_MODE_INTER_NOMV,pipe.fr+0,pipe.qs+0,skip_ssd);
if(_enc->sp_level<OC_SP_LEVEL_NOMC){
oc_cost_intra(_enc,modes+OC_MODE_INTRA,mbi,
pipe.fr+0,pipe.qs+0,intra_satd,skip_ssd);
mb_mv_bits_0=oc_cost_inter1mv(_enc,modes+OC_MODE_INTER_MV,mbi,
OC_MODE_INTER_MV,embs[mbi].unref_mv[OC_FRAME_PREV],
pipe.fr+0,pipe.qs+0,skip_ssd);
oc_cost_inter(_enc,modes+OC_MODE_INTER_MV_LAST,mbi,
OC_MODE_INTER_MV_LAST,last_mv,pipe.fr+0,pipe.qs+0,skip_ssd);
oc_cost_inter(_enc,modes+OC_MODE_INTER_MV_LAST2,mbi,
OC_MODE_INTER_MV_LAST2,prior_mv,pipe.fr+0,pipe.qs+0,skip_ssd);
oc_cost_inter4mv(_enc,modes+OC_MODE_INTER_MV_FOUR,mbi,
embs[mbi].block_mv,pipe.fr+0,pipe.qs+0,skip_ssd);
oc_cost_inter_nomv(_enc,modes+OC_MODE_GOLDEN_NOMV,mbi,
OC_MODE_GOLDEN_NOMV,pipe.fr+0,pipe.qs+0,skip_ssd);
mb_gmv_bits_0=oc_cost_inter1mv(_enc,modes+OC_MODE_GOLDEN_MV,mbi,
OC_MODE_GOLDEN_MV,embs[mbi].unref_mv[OC_FRAME_GOLD],
pipe.fr+0,pipe.qs+0,skip_ssd);
/*The explicit MV modes (2,6,7) have not yet gone through halfpel
refinement.
We choose the explicit MV mode that's already furthest ahead on
R-D cost and refine only that one.
We have to be careful to remember which ones we've refined so that
we don't refine it again if we re-encode this frame.*/
inter_mv_pref=_enc->lambda*3;
if(modes[OC_MODE_INTER_MV_FOUR].cost<modes[OC_MODE_INTER_MV].cost&&
modes[OC_MODE_INTER_MV_FOUR].cost<modes[OC_MODE_GOLDEN_MV].cost){
if(!(embs[mbi].refined&0x80)){
oc_mcenc_refine4mv(_enc,mbi);
embs[mbi].refined|=0x80;
}
oc_cost_inter4mv(_enc,modes+OC_MODE_INTER_MV_FOUR,mbi,
embs[mbi].ref_mv,pipe.fr+0,pipe.qs+0,skip_ssd);
}
else if(modes[OC_MODE_GOLDEN_MV].cost+inter_mv_pref<
modes[OC_MODE_INTER_MV].cost){
if(!(embs[mbi].refined&0x40)){
oc_mcenc_refine1mv(_enc,mbi,OC_FRAME_GOLD);
embs[mbi].refined|=0x40;
}
mb_gmv_bits_0=oc_cost_inter1mv(_enc,modes+OC_MODE_GOLDEN_MV,mbi,
OC_MODE_GOLDEN_MV,embs[mbi].analysis_mv[0][OC_FRAME_GOLD],
pipe.fr+0,pipe.qs+0,skip_ssd);
}
if(!(embs[mbi].refined&0x04)){
oc_mcenc_refine1mv(_enc,mbi,OC_FRAME_PREV);
embs[mbi].refined|=0x04;
}
mb_mv_bits_0=oc_cost_inter1mv(_enc,modes+OC_MODE_INTER_MV,mbi,
OC_MODE_INTER_MV,embs[mbi].analysis_mv[0][OC_FRAME_PREV],
pipe.fr+0,pipe.qs+0,skip_ssd);
/*Finally, pick the mode with the cheapest estimated R-D cost.*/
mb_mode=OC_MODE_INTER_NOMV;
if(modes[OC_MODE_INTRA].cost<modes[OC_MODE_INTER_NOMV].cost){
mb_mode=OC_MODE_INTRA;
}
if(modes[OC_MODE_INTER_MV_LAST].cost<modes[mb_mode].cost){
mb_mode=OC_MODE_INTER_MV_LAST;
}
if(modes[OC_MODE_INTER_MV_LAST2].cost<modes[mb_mode].cost){
mb_mode=OC_MODE_INTER_MV_LAST2;
}
if(modes[OC_MODE_GOLDEN_NOMV].cost<modes[mb_mode].cost){
mb_mode=OC_MODE_GOLDEN_NOMV;
}
if(modes[OC_MODE_GOLDEN_MV].cost<modes[mb_mode].cost){
mb_mode=OC_MODE_GOLDEN_MV;
}
if(modes[OC_MODE_INTER_MV_FOUR].cost<modes[mb_mode].cost){
mb_mode=OC_MODE_INTER_MV_FOUR;
}
/*We prefer OC_MODE_INTER_MV, but not over LAST and LAST2.*/
if(mb_mode==OC_MODE_INTER_MV_LAST||mb_mode==OC_MODE_INTER_MV_LAST2){
inter_mv_pref=0;
}
if(modes[OC_MODE_INTER_MV].cost<modes[mb_mode].cost+inter_mv_pref){
mb_mode=OC_MODE_INTER_MV;
}
}
else{
oc_cost_inter_nomv(_enc,modes+OC_MODE_GOLDEN_NOMV,mbi,
OC_MODE_GOLDEN_NOMV,pipe.fr+0,pipe.qs+0,skip_ssd);
mb_mode=OC_MODE_INTER_NOMV;
if(modes[OC_MODE_INTRA].cost<modes[OC_MODE_INTER_NOMV].cost){
mb_mode=OC_MODE_INTRA;
}
if(modes[OC_MODE_GOLDEN_NOMV].cost<modes[mb_mode].cost){
mb_mode=OC_MODE_GOLDEN_NOMV;
}
mb_mv_bits_0=mb_gmv_bits_0=0;
}
mb_modes[mbi]=mb_mode;
/*Propagate the MVs to the luma blocks.*/
if(mb_mode!=OC_MODE_INTER_MV_FOUR){
switch(mb_mode){
case OC_MODE_INTER_MV:{
dx=embs[mbi].analysis_mv[0][OC_FRAME_PREV][0];
dy=embs[mbi].analysis_mv[0][OC_FRAME_PREV][1];
}break;
case OC_MODE_INTER_MV_LAST:{
dx=last_mv[0];
dy=last_mv[1];
}break;
case OC_MODE_INTER_MV_LAST2:{
dx=prior_mv[0];
dy=prior_mv[1];
}break;
case OC_MODE_GOLDEN_MV:{
dx=embs[mbi].analysis_mv[0][OC_FRAME_GOLD][0];
dy=embs[mbi].analysis_mv[0][OC_FRAME_GOLD][1];
}break;
}
for(bi=0;bi<4;bi++){
fragi=mb_maps[mbi][0][bi];
frag_mvs[fragi][0]=(signed char)dx;
frag_mvs[fragi][1]=(signed char)dy;
}
}
for(bi=0;bi<4;bi++){
fragi=sb_maps[mbi>>2][mbi&3][bi];
frags[fragi].qii=modes[mb_mode].qii[bi];
}
if(oc_enc_mb_transform_quantize_luma(_enc,&pipe,mbi,
modes[mb_mode].overhead>>OC_BIT_SCALE)>0){
int orig_mb_mode;
orig_mb_mode=mb_mode;
mb_mode=mb_modes[mbi];
switch(mb_mode){
case OC_MODE_INTER_MV:{
memcpy(prior_mv,last_mv,sizeof(prior_mv));
/*If we're backing out from 4MV, find the MV we're actually
using.*/
if(orig_mb_mode==OC_MODE_INTER_MV_FOUR){
for(bi=0;;bi++){
fragi=mb_maps[mbi][0][bi];
if(frags[fragi].coded){
memcpy(last_mv,frag_mvs[fragi],sizeof(last_mv));
dx=frag_mvs[fragi][0];
dy=frag_mvs[fragi][1];
break;
}
}
mb_mv_bits_0=OC_MV_BITS[0][dx+31]+OC_MV_BITS[0][dy+31];
}
/*Otherwise we used the original analysis MV.*/
else{
memcpy(last_mv,
embs[mbi].analysis_mv[0][OC_FRAME_PREV],sizeof(last_mv));
}
_enc->mv_bits[0]+=mb_mv_bits_0;
_enc->mv_bits[1]+=12;
}break;
case OC_MODE_INTER_MV_LAST2:{
oc_mv tmp_mv;
memcpy(tmp_mv,prior_mv,sizeof(tmp_mv));
memcpy(prior_mv,last_mv,sizeof(prior_mv));
memcpy(last_mv,tmp_mv,sizeof(last_mv));
}break;
case OC_MODE_GOLDEN_MV:{
_enc->mv_bits[0]+=mb_gmv_bits_0;
_enc->mv_bits[1]+=12;
}break;
case OC_MODE_INTER_MV_FOUR:{
oc_mv lbmvs[4];
oc_mv cbmvs[4];
memcpy(prior_mv,last_mv,sizeof(prior_mv));
for(bi=0;bi<4;bi++){
fragi=mb_maps[mbi][0][bi];
if(frags[fragi].coded){
memcpy(last_mv,frag_mvs[fragi],sizeof(last_mv));
memcpy(lbmvs[bi],frag_mvs[fragi],sizeof(lbmvs[bi]));
_enc->mv_bits[0]+=OC_MV_BITS[0][frag_mvs[fragi][0]+31]
+OC_MV_BITS[0][frag_mvs[fragi][1]+31];
_enc->mv_bits[1]+=12;
}
/*Replace the block MVs for not-coded blocks with (0,0).*/
else memset(lbmvs[bi],0,sizeof(lbmvs[bi]));
}
(*set_chroma_mvs)(cbmvs,(const oc_mv *)lbmvs);
for(mapii=4;mapii<nmap_idxs;mapii++){
mapi=map_idxs[mapii];
pli=mapi>>2;
bi=mapi&3;
fragi=mb_maps[mbi][pli][bi];
frags[fragi].mb_mode=mb_mode;
frags[fragi].qii=modes[OC_MODE_INTER_MV_FOUR].qii[mapii];
memcpy(frag_mvs[fragi],cbmvs[bi],sizeof(frag_mvs[fragi]));
}
}break;
}
coded_mbis[ncoded_mbis++]=mbi;
oc_mode_scheme_chooser_update(&_enc->chooser,mb_mode);
interbits+=modes[mb_mode].rate+modes[mb_mode].overhead;
}
else{
*(uncoded_mbis-++nuncoded_mbis)=mbi;
mb_mode=OC_MODE_INTER_NOMV;
dx=dy=0;
}
/*Propagate final MB mode and MVs to the chroma blocks.
This has already been done for 4MV mode, since it requires individual
block motion vectors.*/
if(mb_mode!=OC_MODE_INTER_MV_FOUR){
for(mapii=4;mapii<nmap_idxs;mapii++){
mapi=map_idxs[mapii];
pli=mapi>>2;
bi=mapi&3;
fragi=mb_maps[mbi][pli][bi];
frags[fragi].mb_mode=mb_mode;
/*If we switched from 4MV mode to INTER_MV mode, then the qii
values won't have been chosen with the right MV, but it's
probaby not worth re-estimating them.*/
frags[fragi].qii=modes[mb_mode].qii[mapii];
frag_mvs[fragi][0]=(signed char)dx;
frag_mvs[fragi][1]=(signed char)dy;
}
}
}
oc_fr_state_flush_sb(pipe.fr+0);
sb_flags[sbi].coded_fully=pipe.fr[0].sb_full;
sb_flags[sbi].coded_partially=pipe.fr[0].sb_partial;
}
oc_enc_pipeline_finish_mcu_plane(_enc,&pipe,0,notstart,notdone);
/*Code chroma planes.*/
for(pli=1;pli<3;pli++){
oc_enc_sb_transform_quantize_chroma(_enc,&pipe,
pli,pipe.sbi0[pli],pipe.sbi_end[pli]);
oc_enc_pipeline_finish_mcu_plane(_enc,&pipe,pli,notstart,notdone);
}
notstart=1;
}
/*Finish filling in the reference frame borders.*/
refi=_enc->state.ref_frame_idx[OC_FRAME_SELF];
for(pli=0;pli<3;pli++)oc_state_borders_fill_caps(&_enc->state,refi,pli);
/*Finish adding flagging overhead costs to inter bit counts to determine if
we should have coded a key frame instead.*/
if(_allow_keyframe){
if(interbits>intrabits)return 1;
/*Technically the chroma plane counts are over-estimations, because they
don't account for continuing runs from the luma planes, but the
inaccuracy is small.*/
for(pli=0;pli<3;pli++)interbits+=pipe.fr[pli].bits<<OC_BIT_SCALE;
interbits+=OC_MINI(_enc->mv_bits[0],_enc->mv_bits[1])<<OC_BIT_SCALE;
interbits+=
_enc->chooser.scheme_bits[_enc->chooser.scheme_list[0]]<<OC_BIT_SCALE;
if(interbits>intrabits)return 1;
}
_enc->ncoded_mbis=ncoded_mbis;
/*Compact the coded fragment list.*/
{
ptrdiff_t ncoded_fragis;
ncoded_fragis=_enc->state.ncoded_fragis[0];
for(pli=1;pli<3;pli++){
memmove(_enc->state.coded_fragis+ncoded_fragis,
_enc->state.coded_fragis+_enc->state.fplanes[pli].froffset,
_enc->state.ncoded_fragis[pli]*sizeof(*_enc->state.coded_fragis));
ncoded_fragis+=_enc->state.ncoded_fragis[pli];
}
_enc->state.ntotal_coded_fragis=ncoded_fragis;
}
return 0;
}
#if defined(OC_COLLECT_METRICS)
# include <stdio.h>
# include <math.h>
/*TODO: It may be helpful (for block-level quantizers especially) to separate
out the contributions from AC and DC into separate tables.*/
# define OC_ZWEIGHT (0.25)
static void oc_mode_metrics_add(oc_mode_metrics *_metrics,
double _w,int _satd,int _rate,double _rmse){
double rate;
/*Accumulate statistics without the scaling; this lets us change the scale
factor yet still use old data.*/
rate=ldexp(_rate,-OC_BIT_SCALE);
if(_metrics->fragw>0){
double dsatd;
double drate;
double drmse;
double w;
dsatd=_satd-_metrics->satd/_metrics->fragw;
drate=rate-_metrics->rate/_metrics->fragw;
drmse=_rmse-_metrics->rmse/_metrics->fragw;
w=_metrics->fragw*_w/(_metrics->fragw+_w);
_metrics->satd2+=dsatd*dsatd*w;
_metrics->satdrate+=dsatd*drate*w;
_metrics->rate2+=drate*drate*w;
_metrics->satdrmse+=dsatd*drmse*w;
_metrics->rmse2+=drmse*drmse*w;
}
_metrics->fragw+=_w;
_metrics->satd+=_satd*_w;
_metrics->rate+=rate*_w;
_metrics->rmse+=_rmse*_w;
}
static void oc_mode_metrics_merge(oc_mode_metrics *_dst,
const oc_mode_metrics *_src,int _n){
int i;
/*Find a non-empty set of metrics.*/
for(i=0;i<_n&&_src[i].fragw<=0;i++);
if(i>=_n){
memset(_dst,0,sizeof(*_dst));
return;
}
memcpy(_dst,_src+i,sizeof(*_dst));
/*And iterate over the remaining non-empty sets of metrics.*/
for(i++;i<_n;i++)if(_src[i].fragw>0){
double wa;
double wb;
double dsatd;
double drate;
double drmse;
double w;
wa=_dst->fragw;
wb=_src[i].fragw;
dsatd=_src[i].satd/wb-_dst->satd/wa;
drate=_src[i].rate/wb-_dst->rate/wa;
drmse=_src[i].rmse/wb-_dst->rmse/wa;
w=wa*wb/(wa+wb);
_dst->fragw+=_src[i].fragw;
_dst->satd+=_src[i].satd;
_dst->rate+=_src[i].rate;
_dst->rmse+=_src[i].rmse;
_dst->satd2+=_src[i].satd2+dsatd*dsatd*w;
_dst->satdrate+=_src[i].satdrate+dsatd*drate*w;
_dst->rate2+=_src[i].rate2+drate*drate*w;
_dst->satdrmse+=_src[i].satdrmse+dsatd*drmse*w;
_dst->rmse2+=_src[i].rmse2+drmse*drmse*w;
}
}
/*Compile collected SATD/rate/RMSE metrics into a form that's immediately
useful for mode decision.*/
static void oc_enc_mode_metrics_update(oc_enc_ctx *_enc,int _qi){
int pli;
int qti;
oc_restore_fpu(&_enc->state);
/*Convert raw collected data into cleaned up sample points.*/
for(pli=0;pli<3;pli++){
for(qti=0;qti<2;qti++){
double fragw;
int bin0;
int bin1;
int bin;
fragw=0;
bin0=bin1=0;
for(bin=0;bin<OC_SAD_BINS;bin++){
oc_mode_metrics metrics;
OC_MODE_RD[_qi][pli][qti][bin].rate=0;
OC_MODE_RD[_qi][pli][qti][bin].rmse=0;
/*Find some points on either side of the current bin.*/
while((bin1<bin+1||fragw<OC_ZWEIGHT)&&bin1<OC_SAD_BINS-1){
fragw+=OC_MODE_METRICS[_qi][pli][qti][bin1++].fragw;
}
while(bin0+1<bin&&bin0+1<bin1&&
fragw-OC_MODE_METRICS[_qi][pli][qti][bin0].fragw>=OC_ZWEIGHT){
fragw-=OC_MODE_METRICS[_qi][pli][qti][bin0++].fragw;
}
/*Merge statistics and fit lines.*/
oc_mode_metrics_merge(&metrics,
OC_MODE_METRICS[_qi][pli][qti]+bin0,bin1-bin0);
if(metrics.fragw>0&&metrics.satd2>0){
double a;
double b;
double msatd;
double mrate;
double mrmse;
double rate;
double rmse;
msatd=metrics.satd/metrics.fragw;
mrate=metrics.rate/metrics.fragw;
mrmse=metrics.rmse/metrics.fragw;
/*Compute the points on these lines corresponding to the actual bin
value.*/
b=metrics.satdrate/metrics.satd2;
a=mrate-b*msatd;
rate=ldexp(a+b*(bin<<OC_SAD_SHIFT),OC_BIT_SCALE);
OC_MODE_RD[_qi][pli][qti][bin].rate=
(ogg_int16_t)OC_CLAMPI(-32768,(int)(rate+0.5),32767);
b=metrics.satdrmse/metrics.satd2;
a=mrmse-b*msatd;
rmse=ldexp(a+b*(bin<<OC_SAD_SHIFT),OC_RMSE_SCALE);
OC_MODE_RD[_qi][pli][qti][bin].rmse=
(ogg_int16_t)OC_CLAMPI(-32768,(int)(rmse+0.5),32767);
}
}
}
}
}
/*The following token skipping code used to also be used in the decoder (and
even at one point other places in the encoder).
However, it was obsoleted by other optimizations, and is now only used here.
It has been moved here to avoid generating the code when it's not needed.*/
/*Determines the number of blocks or coefficients to be skipped for a given
token value.
_token: The token value to skip.
_extra_bits: The extra bits attached to this token.
Return: A positive value indicates that number of coefficients are to be
skipped in the current block.
Otherwise, the negative of the return value indicates that number of
blocks are to be ended.*/
typedef ptrdiff_t (*oc_token_skip_func)(int _token,int _extra_bits);
/*Handles the simple end of block tokens.*/
static ptrdiff_t oc_token_skip_eob(int _token,int _extra_bits){
int nblocks_adjust;
nblocks_adjust=OC_UNIBBLE_TABLE32(0,1,2,3,7,15,0,0,_token)+1;
return -_extra_bits-nblocks_adjust;
}
/*The last EOB token has a special case, where an EOB run of size zero ends all
the remaining blocks in the frame.*/
static ptrdiff_t oc_token_skip_eob6(int _token,int _extra_bits){
/*Note: We want to return -PTRDIFF_MAX, but that requires C99, which is not
yet available everywhere; this should be equivalent.*/
if(!_extra_bits)return -(~(size_t)0>>1);
return -_extra_bits;
}
/*Handles the pure zero run tokens.*/
static ptrdiff_t oc_token_skip_zrl(int _token,int _extra_bits){
return _extra_bits+1;
}
/*Handles a normal coefficient value token.*/
static ptrdiff_t oc_token_skip_val(void){
return 1;
}
/*Handles a category 1A zero run/coefficient value combo token.*/
static ptrdiff_t oc_token_skip_run_cat1a(int _token){
return _token-OC_DCT_RUN_CAT1A+2;
}
/*Handles category 1b, 1c, 2a, and 2b zero run/coefficient value combo tokens.*/
static ptrdiff_t oc_token_skip_run(int _token,int _extra_bits){
int run_cati;
int ncoeffs_mask;
int ncoeffs_adjust;
run_cati=_token-OC_DCT_RUN_CAT1B;
ncoeffs_mask=OC_BYTE_TABLE32(3,7,0,1,run_cati);
ncoeffs_adjust=OC_BYTE_TABLE32(7,11,2,3,run_cati);
return (_extra_bits&ncoeffs_mask)+ncoeffs_adjust;
}
/*A jump table for computing the number of coefficients or blocks to skip for
a given token value.
This reduces all the conditional branches, etc., needed to parse these token
values down to one indirect jump.*/
static const oc_token_skip_func OC_TOKEN_SKIP_TABLE[TH_NDCT_TOKENS]={
oc_token_skip_eob,
oc_token_skip_eob,
oc_token_skip_eob,
oc_token_skip_eob,
oc_token_skip_eob,
oc_token_skip_eob,
oc_token_skip_eob6,
oc_token_skip_zrl,
oc_token_skip_zrl,
(oc_token_skip_func)oc_token_skip_val,
(oc_token_skip_func)oc_token_skip_val,
(oc_token_skip_func)oc_token_skip_val,
(oc_token_skip_func)oc_token_skip_val,
(oc_token_skip_func)oc_token_skip_val,
(oc_token_skip_func)oc_token_skip_val,
(oc_token_skip_func)oc_token_skip_val,
(oc_token_skip_func)oc_token_skip_val,
(oc_token_skip_func)oc_token_skip_val,
(oc_token_skip_func)oc_token_skip_val,
(oc_token_skip_func)oc_token_skip_val,
(oc_token_skip_func)oc_token_skip_val,
(oc_token_skip_func)oc_token_skip_val,
(oc_token_skip_func)oc_token_skip_val,
(oc_token_skip_func)oc_token_skip_run_cat1a,
(oc_token_skip_func)oc_token_skip_run_cat1a,
(oc_token_skip_func)oc_token_skip_run_cat1a,
(oc_token_skip_func)oc_token_skip_run_cat1a,
(oc_token_skip_func)oc_token_skip_run_cat1a,
oc_token_skip_run,
oc_token_skip_run,
oc_token_skip_run,
oc_token_skip_run
};
/*Determines the number of blocks or coefficients to be skipped for a given
token value.
_token: The token value to skip.
_extra_bits: The extra bits attached to this token.
Return: A positive value indicates that number of coefficients are to be
skipped in the current block.
Otherwise, the negative of the return value indicates that number of
blocks are to be ended.
0 will never be returned, so that at least one coefficient in one
block will always be decoded for every token.*/
static ptrdiff_t oc_dct_token_skip(int _token,int _extra_bits){
return (*OC_TOKEN_SKIP_TABLE[_token])(_token,_extra_bits);
}
void oc_enc_mode_metrics_collect(oc_enc_ctx *_enc){
static const unsigned char OC_ZZI_HUFF_OFFSET[64]={
0,16,16,16,16,16,32,32,
32,32,32,32,32,32,32,48,
48,48,48,48,48,48,48,48,
48,48,48,48,64,64,64,64,
64,64,64,64,64,64,64,64,
64,64,64,64,64,64,64,64,
64,64,64,64,64,64,64,64
};
const oc_fragment *frags;
const unsigned *frag_satd;
const unsigned *frag_ssd;
const ptrdiff_t *coded_fragis;
ptrdiff_t ncoded_fragis;
ptrdiff_t fragii;
double fragw;
int qti;
int qii;
int qi;
int pli;
int zzi;
int token;
int eb;
oc_restore_fpu(&_enc->state);
/*Load any existing mode metrics if we haven't already.*/
if(!oc_has_mode_metrics){
FILE *fmetrics;
memset(OC_MODE_METRICS,0,sizeof(OC_MODE_METRICS));
fmetrics=fopen("modedec.stats","rb");
if(fmetrics!=NULL){
fread(OC_MODE_METRICS,sizeof(OC_MODE_METRICS),1,fmetrics);
fclose(fmetrics);
}
for(qi=0;qi<64;qi++)oc_enc_mode_metrics_update(_enc,qi);
oc_has_mode_metrics=1;
}
qti=_enc->state.frame_type;
frags=_enc->state.frags;
frag_satd=_enc->frag_satd;
frag_ssd=_enc->frag_ssd;
coded_fragis=_enc->state.coded_fragis;
ncoded_fragis=fragii=0;
/*Weight the fragments by the inverse frame size; this prevents HD content
from dominating the statistics.*/
fragw=1.0/_enc->state.nfrags;
for(pli=0;pli<3;pli++){
ptrdiff_t ti[64];
int eob_token[64];
int eob_run[64];
/*Set up token indices and eob run counts.
We don't bother trying to figure out the real cost of the runs that span
coefficients; instead we use the costs that were available when R-D
token optimization was done.*/
for(zzi=0;zzi<64;zzi++){
ti[zzi]=_enc->dct_token_offs[pli][zzi];
if(ti[zzi]>0){
token=_enc->dct_tokens[pli][zzi][0];
eb=_enc->extra_bits[pli][zzi][0];
eob_token[zzi]=token;
eob_run[zzi]=-oc_dct_token_skip(token,eb);
}
else{
eob_token[zzi]=OC_NDCT_EOB_TOKEN_MAX;
eob_run[zzi]=0;
}
}
/*Scan the list of coded fragments for this plane.*/
ncoded_fragis+=_enc->state.ncoded_fragis[pli];
for(;fragii<ncoded_fragis;fragii++){
ptrdiff_t fragi;
ogg_uint32_t frag_bits;
int huffi;
int skip;
int mb_mode;
unsigned satd;
int bin;
fragi=coded_fragis[fragii];
frag_bits=0;
for(zzi=0;zzi<64;){
if(eob_run[zzi]>0){
/*We've reached the end of the block.*/
eob_run[zzi]--;
break;
}
huffi=_enc->huff_idxs[qti][zzi>0][pli+1>>1]
+OC_ZZI_HUFF_OFFSET[zzi];
if(eob_token[zzi]<OC_NDCT_EOB_TOKEN_MAX){
/*This token caused an EOB run to be flushed.
Therefore it gets the bits associated with it.*/
frag_bits+=_enc->huff_codes[huffi][eob_token[zzi]].nbits
+OC_DCT_TOKEN_EXTRA_BITS[eob_token[zzi]];
eob_token[zzi]=OC_NDCT_EOB_TOKEN_MAX;
}
token=_enc->dct_tokens[pli][zzi][ti[zzi]];
eb=_enc->extra_bits[pli][zzi][ti[zzi]];
ti[zzi]++;
skip=oc_dct_token_skip(token,eb);
if(skip<0){
eob_token[zzi]=token;
eob_run[zzi]=-skip;
}
else{
/*A regular DCT value token; accumulate the bits for it.*/
frag_bits+=_enc->huff_codes[huffi][token].nbits
+OC_DCT_TOKEN_EXTRA_BITS[token];
zzi+=skip;
}
}
mb_mode=frags[fragi].mb_mode;
qi=_enc->state.qis[frags[fragi].qii];
satd=frag_satd[fragi]<<(pli+1&2);
bin=OC_MINI(satd>>OC_SAD_SHIFT,OC_SAD_BINS-1);
oc_mode_metrics_add(OC_MODE_METRICS[qi][pli][mb_mode!=OC_MODE_INTRA]+bin,
fragw,satd,frag_bits<<OC_BIT_SCALE,sqrt(frag_ssd[fragi]));
}
}
/*Update global SATD/rate/RMSE estimation matrix.*/
for(qii=0;qii<_enc->state.nqis;qii++){
oc_enc_mode_metrics_update(_enc,_enc->state.qis[qii]);
}
}
void oc_enc_mode_metrics_dump(oc_enc_ctx *_enc){
FILE *fmetrics;
int qi;
/*Generate sample points for complete list of QI values.*/
for(qi=0;qi<64;qi++)oc_enc_mode_metrics_update(_enc,qi);
fmetrics=fopen("modedec.stats","wb");
if(fmetrics!=NULL){
fwrite(OC_MODE_METRICS,sizeof(OC_MODE_METRICS),1,fmetrics);
fclose(fmetrics);
}
fprintf(stdout,
"/*File generated by libtheora with OC_COLLECT_METRICS"
" defined at compile time.*/\n"
"#if !defined(_modedec_H)\n"
"# define _modedec_H (1)\n"
"\n"
"\n"
"\n"
"# if defined(OC_COLLECT_METRICS)\n"
"typedef struct oc_mode_metrics oc_mode_metrics;\n"
"# endif\n"
"typedef struct oc_mode_rd oc_mode_rd;\n"
"\n"
"\n"
"\n"
"/*The number of extra bits of precision at which to store rate"
" metrics.*/\n"
"# define OC_BIT_SCALE (%i)\n"
"/*The number of extra bits of precision at which to store RMSE metrics.\n"
" This must be at least half OC_BIT_SCALE (rounded up).*/\n"
"# define OC_RMSE_SCALE (%i)\n"
"/*The number of bins to partition statistics into.*/\n"
"# define OC_SAD_BINS (%i)\n"
"/*The number of bits of precision to drop"
" from SAD scores to assign them to a\n"
" bin.*/\n"
"# define OC_SAD_SHIFT (%i)\n"
"\n"
"\n"
"\n"
"# if defined(OC_COLLECT_METRICS)\n"
"struct oc_mode_metrics{\n"
" double fragw;\n"
" double satd;\n"
" double rate;\n"
" double rmse;\n"
" double satd2;\n"
" double satdrate;\n"
" double rate2;\n"
" double satdrmse;\n"
" double rmse2;\n"
"};\n"
"\n"
"\n"
"int oc_has_mode_metrics;\n"
"oc_mode_metrics OC_MODE_METRICS[64][3][2][OC_SAD_BINS];\n"
"# endif\n"
"\n"
"\n"
"\n"
"struct oc_mode_rd{\n"
" ogg_int16_t rate;\n"
" ogg_int16_t rmse;\n"
"};\n"
"\n"
"\n"
"# if !defined(OC_COLLECT_METRICS)\n"
"static const\n"
"# endif\n"
"oc_mode_rd OC_MODE_RD[64][3][2][OC_SAD_BINS]={\n",
OC_BIT_SCALE,OC_RMSE_SCALE,OC_SAD_BINS,OC_SAD_SHIFT);
for(qi=0;qi<64;qi++){
int pli;
fprintf(stdout," {\n");
for(pli=0;pli<3;pli++){
int qti;
fprintf(stdout," {\n");
for(qti=0;qti<2;qti++){
int bin;
static const char *pl_names[3]={"Y'","Cb","Cr"};
static const char *qti_names[2]={"INTRA","INTER"};
fprintf(stdout," /*%s qi=%i %s*/\n",
pl_names[pli],qi,qti_names[qti]);
fprintf(stdout," {\n");
fprintf(stdout," ");
for(bin=0;bin<OC_SAD_BINS;bin++){
if(bin&&!(bin&0x3))fprintf(stdout,"\n ");
fprintf(stdout,"{%5i,%5i}",
OC_MODE_RD[qi][pli][qti][bin].rate,
OC_MODE_RD[qi][pli][qti][bin].rmse);
if(bin+1<OC_SAD_BINS)fprintf(stdout,",");
}
fprintf(stdout,"\n }");
if(qti<1)fprintf(stdout,",");
fprintf(stdout,"\n");
}
fprintf(stdout," }");
if(pli<2)fprintf(stdout,",");
fprintf(stdout,"\n");
}
fprintf(stdout," }");
if(qi<63)fprintf(stdout,",");
fprintf(stdout,"\n");
}
fprintf(stdout,
"};\n"
"\n"
"#endif\n");
}
#endif
|