Based on kernel version 6.8. Page generated on 2024-03-11 21:26 EST.
| 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 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 |
.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. _codec-stateless-controls:
*********************************
Stateless Codec Control Reference
*********************************
The Stateless Codec control class is intended to support
stateless decoder and encoders (i.e. hardware accelerators).
These drivers are typically supported by the :ref:`stateless_decoder`,
and deal with parsed pixel formats such as V4L2_PIX_FMT_H264_SLICE.
Stateless Codec Control ID
==========================
.. _codec-stateless-control-id:
``V4L2_CID_CODEC_STATELESS_CLASS (class)``
The Stateless Codec class descriptor.
.. _v4l2-codec-stateless-h264:
``V4L2_CID_STATELESS_H264_SPS (struct)``
Specifies the sequence parameter set (as extracted from the
bitstream) for the associated H264 slice data. This includes the
necessary parameters for configuring a stateless hardware decoding
pipeline for H264. The bitstream parameters are defined according
to :ref:`h264`, section 7.4.2.1.1 "Sequence Parameter Set Data
Semantics". For further documentation, refer to the above
specification, unless there is an explicit comment stating
otherwise.
.. c:type:: v4l2_ctrl_h264_sps
.. raw:: latex
\small
.. tabularcolumns:: |p{1.2cm}|p{8.6cm}|p{7.5cm}|
.. flat-table:: struct v4l2_ctrl_h264_sps
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``profile_idc``
-
* - __u8
- ``constraint_set_flags``
- See :ref:`Sequence Parameter Set Constraints Set Flags <h264_sps_constraints_set_flags>`
* - __u8
- ``level_idc``
-
* - __u8
- ``seq_parameter_set_id``
-
* - __u8
- ``chroma_format_idc``
-
* - __u8
- ``bit_depth_luma_minus8``
-
* - __u8
- ``bit_depth_chroma_minus8``
-
* - __u8
- ``log2_max_frame_num_minus4``
-
* - __u8
- ``pic_order_cnt_type``
-
* - __u8
- ``log2_max_pic_order_cnt_lsb_minus4``
-
* - __u8
- ``max_num_ref_frames``
-
* - __u8
- ``num_ref_frames_in_pic_order_cnt_cycle``
-
* - __s32
- ``offset_for_ref_frame[255]``
-
* - __s32
- ``offset_for_non_ref_pic``
-
* - __s32
- ``offset_for_top_to_bottom_field``
-
* - __u16
- ``pic_width_in_mbs_minus1``
-
* - __u16
- ``pic_height_in_map_units_minus1``
-
* - __u32
- ``flags``
- See :ref:`Sequence Parameter Set Flags <h264_sps_flags>`
.. raw:: latex
\normalsize
.. _h264_sps_constraints_set_flags:
``Sequence Parameter Set Constraints Set Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_H264_SPS_CONSTRAINT_SET0_FLAG``
- 0x00000001
-
* - ``V4L2_H264_SPS_CONSTRAINT_SET1_FLAG``
- 0x00000002
-
* - ``V4L2_H264_SPS_CONSTRAINT_SET2_FLAG``
- 0x00000004
-
* - ``V4L2_H264_SPS_CONSTRAINT_SET3_FLAG``
- 0x00000008
-
* - ``V4L2_H264_SPS_CONSTRAINT_SET4_FLAG``
- 0x00000010
-
* - ``V4L2_H264_SPS_CONSTRAINT_SET5_FLAG``
- 0x00000020
-
.. _h264_sps_flags:
``Sequence Parameter Set Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_H264_SPS_FLAG_SEPARATE_COLOUR_PLANE``
- 0x00000001
-
* - ``V4L2_H264_SPS_FLAG_QPPRIME_Y_ZERO_TRANSFORM_BYPASS``
- 0x00000002
-
* - ``V4L2_H264_SPS_FLAG_DELTA_PIC_ORDER_ALWAYS_ZERO``
- 0x00000004
-
* - ``V4L2_H264_SPS_FLAG_GAPS_IN_FRAME_NUM_VALUE_ALLOWED``
- 0x00000008
-
* - ``V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY``
- 0x00000010
-
* - ``V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD``
- 0x00000020
-
* - ``V4L2_H264_SPS_FLAG_DIRECT_8X8_INFERENCE``
- 0x00000040
-
``V4L2_CID_STATELESS_H264_PPS (struct)``
Specifies the picture parameter set (as extracted from the
bitstream) for the associated H264 slice data. This includes the
necessary parameters for configuring a stateless hardware decoding
pipeline for H264. The bitstream parameters are defined according
to :ref:`h264`, section 7.4.2.2 "Picture Parameter Set RBSP
Semantics". For further documentation, refer to the above
specification, unless there is an explicit comment stating
otherwise.
.. c:type:: v4l2_ctrl_h264_pps
.. raw:: latex
\small
.. flat-table:: struct v4l2_ctrl_h264_pps
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``pic_parameter_set_id``
-
* - __u8
- ``seq_parameter_set_id``
-
* - __u8
- ``num_slice_groups_minus1``
-
* - __u8
- ``num_ref_idx_l0_default_active_minus1``
-
* - __u8
- ``num_ref_idx_l1_default_active_minus1``
-
* - __u8
- ``weighted_bipred_idc``
-
* - __s8
- ``pic_init_qp_minus26``
-
* - __s8
- ``pic_init_qs_minus26``
-
* - __s8
- ``chroma_qp_index_offset``
-
* - __s8
- ``second_chroma_qp_index_offset``
-
* - __u16
- ``flags``
- See :ref:`Picture Parameter Set Flags <h264_pps_flags>`
.. raw:: latex
\normalsize
.. _h264_pps_flags:
``Picture Parameter Set Flags``
.. raw:: latex
\begingroup
\scriptsize
\setlength{\tabcolsep}{2pt}
.. tabularcolumns:: |p{9.8cm}|p{1.0cm}|p{6.5cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 10 1 4
* - ``V4L2_H264_PPS_FLAG_ENTROPY_CODING_MODE``
- 0x0001
-
* - ``V4L2_H264_PPS_FLAG_BOTTOM_FIELD_PIC_ORDER_IN_FRAME_PRESENT``
- 0x0002
-
* - ``V4L2_H264_PPS_FLAG_WEIGHTED_PRED``
- 0x0004
-
* - ``V4L2_H264_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT``
- 0x0008
-
* - ``V4L2_H264_PPS_FLAG_CONSTRAINED_INTRA_PRED``
- 0x0010
-
* - ``V4L2_H264_PPS_FLAG_REDUNDANT_PIC_CNT_PRESENT``
- 0x0020
-
* - ``V4L2_H264_PPS_FLAG_TRANSFORM_8X8_MODE``
- 0x0040
-
* - ``V4L2_H264_PPS_FLAG_SCALING_MATRIX_PRESENT``
- 0x0080
- ``V4L2_CID_STATELESS_H264_SCALING_MATRIX``
must be used for this picture.
.. raw:: latex
\endgroup
``V4L2_CID_STATELESS_H264_SCALING_MATRIX (struct)``
Specifies the scaling matrix (as extracted from the bitstream) for
the associated H264 slice data. The bitstream parameters are
defined according to :ref:`h264`, section 7.4.2.1.1.1 "Scaling
List Semantics". For further documentation, refer to the above
specification, unless there is an explicit comment stating
otherwise.
.. c:type:: v4l2_ctrl_h264_scaling_matrix
.. raw:: latex
\small
.. tabularcolumns:: |p{0.6cm}|p{4.8cm}|p{11.9cm}|
.. flat-table:: struct v4l2_ctrl_h264_scaling_matrix
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``scaling_list_4x4[6][16]``
- Scaling matrix after applying the inverse scanning process.
Expected list order is Intra Y, Intra Cb, Intra Cr, Inter Y,
Inter Cb, Inter Cr. The values on each scaling list are
expected in raster scan order.
* - __u8
- ``scaling_list_8x8[6][64]``
- Scaling matrix after applying the inverse scanning process.
Expected list order is Intra Y, Inter Y, Intra Cb, Inter Cb,
Intra Cr, Inter Cr. The values on each scaling list are
expected in raster scan order.
``V4L2_CID_STATELESS_H264_SLICE_PARAMS (struct)``
Specifies the slice parameters (as extracted from the bitstream)
for the associated H264 slice data. This includes the necessary
parameters for configuring a stateless hardware decoding pipeline
for H264. The bitstream parameters are defined according to
:ref:`h264`, section 7.4.3 "Slice Header Semantics". For further
documentation, refer to the above specification, unless there is
an explicit comment stating otherwise.
.. c:type:: v4l2_ctrl_h264_slice_params
.. raw:: latex
\small
.. tabularcolumns:: |p{4.0cm}|p{5.9cm}|p{7.4cm}|
.. flat-table:: struct v4l2_ctrl_h264_slice_params
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u32
- ``header_bit_size``
- Offset in bits to slice_data() from the beginning of this slice.
* - __u32
- ``first_mb_in_slice``
-
* - __u8
- ``slice_type``
-
* - __u8
- ``colour_plane_id``
-
* - __u8
- ``redundant_pic_cnt``
-
* - __u8
- ``cabac_init_idc``
-
* - __s8
- ``slice_qp_delta``
-
* - __s8
- ``slice_qs_delta``
-
* - __u8
- ``disable_deblocking_filter_idc``
-
* - __s8
- ``slice_alpha_c0_offset_div2``
-
* - __s8
- ``slice_beta_offset_div2``
-
* - __u8
- ``num_ref_idx_l0_active_minus1``
- If num_ref_idx_active_override_flag is not set, this field must be
set to the value of num_ref_idx_l0_default_active_minus1
* - __u8
- ``num_ref_idx_l1_active_minus1``
- If num_ref_idx_active_override_flag is not set, this field must be
set to the value of num_ref_idx_l1_default_active_minus1
* - __u8
- ``reserved``
- Applications and drivers must set this to zero.
* - struct :c:type:`v4l2_h264_reference`
- ``ref_pic_list0[32]``
- Reference picture list after applying the per-slice modifications
* - struct :c:type:`v4l2_h264_reference`
- ``ref_pic_list1[32]``
- Reference picture list after applying the per-slice modifications
* - __u32
- ``flags``
- See :ref:`Slice Parameter Flags <h264_slice_flags>`
.. raw:: latex
\normalsize
.. _h264_slice_flags:
``Slice Parameter Set Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED``
- 0x00000001
-
* - ``V4L2_H264_SLICE_FLAG_SP_FOR_SWITCH``
- 0x00000002
-
``V4L2_CID_STATELESS_H264_PRED_WEIGHTS (struct)``
Prediction weight table defined according to :ref:`h264`,
section 7.4.3.2 "Prediction Weight Table Semantics".
The prediction weight table must be passed by applications
under the conditions explained in section 7.3.3 "Slice header
syntax".
.. c:type:: v4l2_ctrl_h264_pred_weights
.. raw:: latex
\small
.. tabularcolumns:: |p{4.9cm}|p{4.9cm}|p{7.5cm}|
.. flat-table:: struct v4l2_ctrl_h264_pred_weights
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u16
- ``luma_log2_weight_denom``
-
* - __u16
- ``chroma_log2_weight_denom``
-
* - struct :c:type:`v4l2_h264_weight_factors`
- ``weight_factors[2]``
- The weight factors at index 0 are the weight factors for the reference
list 0, the one at index 1 for the reference list 1.
.. raw:: latex
\normalsize
.. c:type:: v4l2_h264_weight_factors
.. raw:: latex
\small
.. tabularcolumns:: |p{1.0cm}|p{4.5cm}|p{11.8cm}|
.. flat-table:: struct v4l2_h264_weight_factors
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __s16
- ``luma_weight[32]``
-
* - __s16
- ``luma_offset[32]``
-
* - __s16
- ``chroma_weight[32][2]``
-
* - __s16
- ``chroma_offset[32][2]``
-
.. raw:: latex
\normalsize
``Picture Reference``
.. c:type:: v4l2_h264_reference
.. cssclass:: longtable
.. flat-table:: struct v4l2_h264_reference
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``fields``
- Specifies how the picture is referenced. See :ref:`Reference Fields <h264_ref_fields>`
* - __u8
- ``index``
- Index into the :c:type:`v4l2_ctrl_h264_decode_params`.dpb array.
.. _h264_ref_fields:
``Reference Fields``
.. raw:: latex
\small
.. tabularcolumns:: |p{5.4cm}|p{0.8cm}|p{11.1cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_H264_TOP_FIELD_REF``
- 0x1
- The top field in field pair is used for short-term reference.
* - ``V4L2_H264_BOTTOM_FIELD_REF``
- 0x2
- The bottom field in field pair is used for short-term reference.
* - ``V4L2_H264_FRAME_REF``
- 0x3
- The frame (or the top/bottom fields, if it's a field pair)
is used for short-term reference.
.. raw:: latex
\normalsize
``V4L2_CID_STATELESS_H264_DECODE_PARAMS (struct)``
Specifies the decode parameters (as extracted from the bitstream)
for the associated H264 slice data. This includes the necessary
parameters for configuring a stateless hardware decoding pipeline
for H264. The bitstream parameters are defined according to
:ref:`h264`. For further documentation, refer to the above
specification, unless there is an explicit comment stating
otherwise.
.. c:type:: v4l2_ctrl_h264_decode_params
.. raw:: latex
\small
.. tabularcolumns:: |p{4.0cm}|p{5.9cm}|p{7.4cm}|
.. flat-table:: struct v4l2_ctrl_h264_decode_params
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - struct :c:type:`v4l2_h264_dpb_entry`
- ``dpb[16]``
-
* - __u16
- ``nal_ref_idc``
- NAL reference ID value coming from the NAL Unit header
* - __u16
- ``frame_num``
-
* - __s32
- ``top_field_order_cnt``
- Picture Order Count for the coded top field
* - __s32
- ``bottom_field_order_cnt``
- Picture Order Count for the coded bottom field
* - __u16
- ``idr_pic_id``
-
* - __u16
- ``pic_order_cnt_lsb``
-
* - __s32
- ``delta_pic_order_cnt_bottom``
-
* - __s32
- ``delta_pic_order_cnt0``
-
* - __s32
- ``delta_pic_order_cnt1``
-
* - __u32
- ``dec_ref_pic_marking_bit_size``
- Size in bits of the dec_ref_pic_marking() syntax element.
* - __u32
- ``pic_order_cnt_bit_size``
- Combined size in bits of the picture order count related syntax
elements: pic_order_cnt_lsb, delta_pic_order_cnt_bottom,
delta_pic_order_cnt0, and delta_pic_order_cnt1.
* - __u32
- ``slice_group_change_cycle``
-
* - __u32
- ``reserved``
- Applications and drivers must set this to zero.
* - __u32
- ``flags``
- See :ref:`Decode Parameters Flags <h264_decode_params_flags>`
.. raw:: latex
\normalsize
.. _h264_decode_params_flags:
``Decode Parameters Flags``
.. raw:: latex
\small
.. tabularcolumns:: |p{8.3cm}|p{2.1cm}|p{6.9cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_H264_DECODE_PARAM_FLAG_IDR_PIC``
- 0x00000001
- That picture is an IDR picture
* - ``V4L2_H264_DECODE_PARAM_FLAG_FIELD_PIC``
- 0x00000002
-
* - ``V4L2_H264_DECODE_PARAM_FLAG_BOTTOM_FIELD``
- 0x00000004
-
* - ``V4L2_H264_DECODE_PARAM_FLAG_PFRAME``
- 0x00000008
-
* - ``V4L2_H264_DECODE_PARAM_FLAG_BFRAME``
- 0x00000010
-
.. raw:: latex
\normalsize
.. c:type:: v4l2_h264_dpb_entry
.. raw:: latex
\small
.. tabularcolumns:: |p{1.0cm}|p{4.9cm}|p{11.4cm}|
.. flat-table:: struct v4l2_h264_dpb_entry
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u64
- ``reference_ts``
- Timestamp of the V4L2 capture buffer to use as reference, used
with B-coded and P-coded frames. The timestamp refers to the
``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the
:c:func:`v4l2_timeval_to_ns()` function to convert the struct
:c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64.
* - __u32
- ``pic_num``
- For short term references, this must match the derived value PicNum
(8-28) and for long term references it must match the derived value
LongTermPicNum (8-29). When decoding frames (as opposed to fields)
pic_num is the same as FrameNumWrap.
* - __u16
- ``frame_num``
- For short term references, this must match the frame_num value from
the slice header syntax (the driver will wrap the value if needed). For
long term references, this must be set to the value of
long_term_frame_idx described in the dec_ref_pic_marking() syntax.
* - __u8
- ``fields``
- Specifies how the DPB entry is referenced. See :ref:`Reference Fields <h264_ref_fields>`
* - __u8
- ``reserved[5]``
- Applications and drivers must set this to zero.
* - __s32
- ``top_field_order_cnt``
-
* - __s32
- ``bottom_field_order_cnt``
-
* - __u32
- ``flags``
- See :ref:`DPB Entry Flags <h264_dpb_flags>`
.. raw:: latex
\normalsize
.. _h264_dpb_flags:
``DPB Entries Flags``
.. raw:: latex
\small
.. tabularcolumns:: |p{7.7cm}|p{2.1cm}|p{7.5cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_H264_DPB_ENTRY_FLAG_VALID``
- 0x00000001
- The DPB entry is valid (non-empty) and should be considered.
* - ``V4L2_H264_DPB_ENTRY_FLAG_ACTIVE``
- 0x00000002
- The DPB entry is used for reference.
* - ``V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM``
- 0x00000004
- The DPB entry is used for long-term reference.
* - ``V4L2_H264_DPB_ENTRY_FLAG_FIELD``
- 0x00000008
- The DPB entry is a single field or a complementary field pair.
.. raw:: latex
\normalsize
``V4L2_CID_STATELESS_H264_DECODE_MODE (enum)``
Specifies the decoding mode to use. Currently exposes slice-based and
frame-based decoding but new modes might be added later on.
This control is used as a modifier for V4L2_PIX_FMT_H264_SLICE
pixel format. Applications that support V4L2_PIX_FMT_H264_SLICE
are required to set this control in order to specify the decoding mode
that is expected for the buffer.
Drivers may expose a single or multiple decoding modes, depending
on what they can support.
.. c:type:: v4l2_stateless_h264_decode_mode
.. raw:: latex
\scriptsize
.. tabularcolumns:: |p{7.4cm}|p{0.3cm}|p{9.6cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_STATELESS_H264_DECODE_MODE_SLICE_BASED``
- 0
- Decoding is done at the slice granularity.
The OUTPUT buffer must contain a single slice.
When this mode is selected, the ``V4L2_CID_STATELESS_H264_SLICE_PARAMS``
control shall be set. When multiple slices compose a frame,
use of ``V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF`` flag
is required.
* - ``V4L2_STATELESS_H264_DECODE_MODE_FRAME_BASED``
- 1
- Decoding is done at the frame granularity,
The OUTPUT buffer must contain all slices needed to decode the
frame. The OUTPUT buffer must also contain both fields.
This mode will be supported by devices that
parse the slice(s) header(s) in hardware. When this mode is
selected, the ``V4L2_CID_STATELESS_H264_SLICE_PARAMS``
control shall not be set.
.. raw:: latex
\normalsize
``V4L2_CID_STATELESS_H264_START_CODE (enum)``
Specifies the H264 slice start code expected for each slice.
This control is used as a modifier for V4L2_PIX_FMT_H264_SLICE
pixel format. Applications that support V4L2_PIX_FMT_H264_SLICE
are required to set this control in order to specify the start code
that is expected for the buffer.
Drivers may expose a single or multiple start codes, depending
on what they can support.
.. c:type:: v4l2_stateless_h264_start_code
.. raw:: latex
\small
.. tabularcolumns:: |p{7.9cm}|p{0.4cm}|p{9.0cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 4 1 4
* - ``V4L2_STATELESS_H264_START_CODE_NONE``
- 0
- Selecting this value specifies that H264 slices are passed
to the driver without any start code. The bitstream data should be
according to :ref:`h264` 7.3.1 NAL unit syntax, hence contains
emulation prevention bytes when required.
* - ``V4L2_STATELESS_H264_START_CODE_ANNEX_B``
- 1
- Selecting this value specifies that H264 slices are expected
to be prefixed by Annex B start codes. According to :ref:`h264`
valid start codes can be 3-bytes 0x000001 or 4-bytes 0x00000001.
.. raw:: latex
\normalsize
.. _codec-stateless-fwht:
``V4L2_CID_STATELESS_FWHT_PARAMS (struct)``
Specifies the FWHT (Fast Walsh Hadamard Transform) parameters (as extracted
from the bitstream) for the associated FWHT data. This includes the necessary
parameters for configuring a stateless hardware decoding pipeline for FWHT.
This codec is specific to the vicodec test driver.
.. c:type:: v4l2_ctrl_fwht_params
.. raw:: latex
\small
.. tabularcolumns:: |p{1.4cm}|p{3.9cm}|p{12.0cm}|
.. flat-table:: struct v4l2_ctrl_fwht_params
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u64
- ``backward_ref_ts``
- Timestamp of the V4L2 capture buffer to use as backward reference, used
with P-coded frames. The timestamp refers to the
``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the
:c:func:`v4l2_timeval_to_ns()` function to convert the struct
:c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64.
* - __u32
- ``version``
- The version of the codec. Set to ``V4L2_FWHT_VERSION``.
* - __u32
- ``width``
- The width of the frame.
* - __u32
- ``height``
- The height of the frame.
* - __u32
- ``flags``
- The flags of the frame, see :ref:`fwht-flags`.
* - __u32
- ``colorspace``
- The colorspace of the frame, from enum :c:type:`v4l2_colorspace`.
* - __u32
- ``xfer_func``
- The transfer function, from enum :c:type:`v4l2_xfer_func`.
* - __u32
- ``ycbcr_enc``
- The Y'CbCr encoding, from enum :c:type:`v4l2_ycbcr_encoding`.
* - __u32
- ``quantization``
- The quantization range, from enum :c:type:`v4l2_quantization`.
.. raw:: latex
\normalsize
.. _fwht-flags:
FWHT Flags
==========
.. raw:: latex
\small
.. tabularcolumns:: |p{7.0cm}|p{2.3cm}|p{8.0cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 3 1 4
* - ``V4L2_FWHT_FL_IS_INTERLACED``
- 0x00000001
- Set if this is an interlaced format.
* - ``V4L2_FWHT_FL_IS_BOTTOM_FIRST``
- 0x00000002
- Set if this is a bottom-first (NTSC) interlaced format.
* - ``V4L2_FWHT_FL_IS_ALTERNATE``
- 0x00000004
- Set if each 'frame' contains just one field.
* - ``V4L2_FWHT_FL_IS_BOTTOM_FIELD``
- 0x00000008
- If V4L2_FWHT_FL_IS_ALTERNATE was set, then this is set if this 'frame' is the
bottom field, else it is the top field.
* - ``V4L2_FWHT_FL_LUMA_IS_UNCOMPRESSED``
- 0x00000010
- Set if the Y' (luma) plane is uncompressed.
* - ``V4L2_FWHT_FL_CB_IS_UNCOMPRESSED``
- 0x00000020
- Set if the Cb plane is uncompressed.
* - ``V4L2_FWHT_FL_CR_IS_UNCOMPRESSED``
- 0x00000040
- Set if the Cr plane is uncompressed.
* - ``V4L2_FWHT_FL_CHROMA_FULL_HEIGHT``
- 0x00000080
- Set if the chroma plane has the same height as the luma plane,
else the chroma plane is half the height of the luma plane.
* - ``V4L2_FWHT_FL_CHROMA_FULL_WIDTH``
- 0x00000100
- Set if the chroma plane has the same width as the luma plane,
else the chroma plane is half the width of the luma plane.
* - ``V4L2_FWHT_FL_ALPHA_IS_UNCOMPRESSED``
- 0x00000200
- Set if the alpha plane is uncompressed.
* - ``V4L2_FWHT_FL_I_FRAME``
- 0x00000400
- Set if this is an I-frame.
* - ``V4L2_FWHT_FL_COMPONENTS_NUM_MSK``
- 0x00070000
- The number of color components minus one.
* - ``V4L2_FWHT_FL_PIXENC_MSK``
- 0x00180000
- The mask for the pixel encoding.
* - ``V4L2_FWHT_FL_PIXENC_YUV``
- 0x00080000
- Set if the pixel encoding is YUV.
* - ``V4L2_FWHT_FL_PIXENC_RGB``
- 0x00100000
- Set if the pixel encoding is RGB.
* - ``V4L2_FWHT_FL_PIXENC_HSV``
- 0x00180000
- Set if the pixel encoding is HSV.
.. raw:: latex
\normalsize
.. _v4l2-codec-stateless-vp8:
``V4L2_CID_STATELESS_VP8_FRAME (struct)``
Specifies the frame parameters for the associated VP8 parsed frame data.
This includes the necessary parameters for
configuring a stateless hardware decoding pipeline for VP8.
The bitstream parameters are defined according to :ref:`vp8`.
.. c:type:: v4l2_ctrl_vp8_frame
.. raw:: latex
\small
.. tabularcolumns:: |p{7.0cm}|p{4.6cm}|p{5.7cm}|
.. cssclass:: longtable
.. flat-table:: struct v4l2_ctrl_vp8_frame
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - struct :c:type:`v4l2_vp8_segment`
- ``segment``
- Structure with segment-based adjustments metadata.
* - struct :c:type:`v4l2_vp8_loop_filter`
- ``lf``
- Structure with loop filter level adjustments metadata.
* - struct :c:type:`v4l2_vp8_quantization`
- ``quant``
- Structure with VP8 dequantization indices metadata.
* - struct :c:type:`v4l2_vp8_entropy`
- ``entropy``
- Structure with VP8 entropy coder probabilities metadata.
* - struct :c:type:`v4l2_vp8_entropy_coder_state`
- ``coder_state``
- Structure with VP8 entropy coder state.
* - __u16
- ``width``
- The width of the frame. Must be set for all frames.
* - __u16
- ``height``
- The height of the frame. Must be set for all frames.
* - __u8
- ``horizontal_scale``
- Horizontal scaling factor.
* - __u8
- ``vertical_scaling factor``
- Vertical scale.
* - __u8
- ``version``
- Bitstream version.
* - __u8
- ``prob_skip_false``
- Indicates the probability that the macroblock is not skipped.
* - __u8
- ``prob_intra``
- Indicates the probability that a macroblock is intra-predicted.
* - __u8
- ``prob_last``
- Indicates the probability that the last reference frame is used
for inter-prediction
* - __u8
- ``prob_gf``
- Indicates the probability that the golden reference frame is used
for inter-prediction
* - __u8
- ``num_dct_parts``
- Number of DCT coefficients partitions. Must be one of: 1, 2, 4, or 8.
* - __u32
- ``first_part_size``
- Size of the first partition, i.e. the control partition.
* - __u32
- ``first_part_header_bits``
- Size in bits of the first partition header portion.
* - __u32
- ``dct_part_sizes[8]``
- DCT coefficients sizes.
* - __u64
- ``last_frame_ts``
- Timestamp for the V4L2 capture buffer to use as last reference frame, used
with inter-coded frames. The timestamp refers to the ``timestamp`` field in
struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
function to convert the struct :c:type:`timeval` in struct
:c:type:`v4l2_buffer` to a __u64.
* - __u64
- ``golden_frame_ts``
- Timestamp for the V4L2 capture buffer to use as last reference frame, used
with inter-coded frames. The timestamp refers to the ``timestamp`` field in
struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
function to convert the struct :c:type:`timeval` in struct
:c:type:`v4l2_buffer` to a __u64.
* - __u64
- ``alt_frame_ts``
- Timestamp for the V4L2 capture buffer to use as alternate reference frame, used
with inter-coded frames. The timestamp refers to the ``timestamp`` field in
struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
function to convert the struct :c:type:`timeval` in struct
:c:type:`v4l2_buffer` to a __u64.
* - __u64
- ``flags``
- See :ref:`Frame Flags <vp8_frame_flags>`
.. raw:: latex
\normalsize
.. _vp8_frame_flags:
``Frame Flags``
.. tabularcolumns:: |p{9.8cm}|p{0.8cm}|p{6.7cm}|
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_VP8_FRAME_FLAG_KEY_FRAME``
- 0x01
- Indicates if the frame is a key frame.
* - ``V4L2_VP8_FRAME_FLAG_EXPERIMENTAL``
- 0x02
- Experimental bitstream.
* - ``V4L2_VP8_FRAME_FLAG_SHOW_FRAME``
- 0x04
- Show frame flag, indicates if the frame is for display.
* - ``V4L2_VP8_FRAME_FLAG_MB_NO_SKIP_COEFF``
- 0x08
- Enable/disable skipping of macroblocks with no non-zero coefficients.
* - ``V4L2_VP8_FRAME_FLAG_SIGN_BIAS_GOLDEN``
- 0x10
- Sign of motion vectors when the golden frame is referenced.
* - ``V4L2_VP8_FRAME_FLAG_SIGN_BIAS_ALT``
- 0x20
- Sign of motion vectors when the alt frame is referenced.
.. c:type:: v4l2_vp8_entropy_coder_state
.. cssclass:: longtable
.. tabularcolumns:: |p{1.0cm}|p{2.0cm}|p{14.3cm}|
.. flat-table:: struct v4l2_vp8_entropy_coder_state
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``range``
- coder state value for "Range"
* - __u8
- ``value``
- coder state value for "Value"-
* - __u8
- ``bit_count``
- number of bits left.
* - __u8
- ``padding``
- Applications and drivers must set this to zero.
.. c:type:: v4l2_vp8_segment
.. cssclass:: longtable
.. tabularcolumns:: |p{1.2cm}|p{4.0cm}|p{12.1cm}|
.. flat-table:: struct v4l2_vp8_segment
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __s8
- ``quant_update[4]``
- Signed quantizer value update.
* - __s8
- ``lf_update[4]``
- Signed loop filter level value update.
* - __u8
- ``segment_probs[3]``
- Segment probabilities.
* - __u8
- ``padding``
- Applications and drivers must set this to zero.
* - __u32
- ``flags``
- See :ref:`Segment Flags <vp8_segment_flags>`
.. _vp8_segment_flags:
``Segment Flags``
.. raw:: latex
\small
.. tabularcolumns:: |p{10cm}|p{1.0cm}|p{6.3cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_VP8_SEGMENT_FLAG_ENABLED``
- 0x01
- Enable/disable segment-based adjustments.
* - ``V4L2_VP8_SEGMENT_FLAG_UPDATE_MAP``
- 0x02
- Indicates if the macroblock segmentation map is updated in this frame.
* - ``V4L2_VP8_SEGMENT_FLAG_UPDATE_FEATURE_DATA``
- 0x04
- Indicates if the segment feature data is updated in this frame.
* - ``V4L2_VP8_SEGMENT_FLAG_DELTA_VALUE_MODE``
- 0x08
- If is set, the segment feature data mode is delta-value.
If cleared, it's absolute-value.
.. raw:: latex
\normalsize
.. c:type:: v4l2_vp8_loop_filter
.. cssclass:: longtable
.. tabularcolumns:: |p{1.5cm}|p{3.9cm}|p{11.9cm}|
.. flat-table:: struct v4l2_vp8_loop_filter
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __s8
- ``ref_frm_delta[4]``
- Reference adjustment (signed) delta value.
* - __s8
- ``mb_mode_delta[4]``
- Macroblock prediction mode adjustment (signed) delta value.
* - __u8
- ``sharpness_level``
- Sharpness level
* - __u8
- ``level``
- Filter level
* - __u16
- ``padding``
- Applications and drivers must set this to zero.
* - __u32
- ``flags``
- See :ref:`Loop Filter Flags <vp8_loop_filter_flags>`
.. _vp8_loop_filter_flags:
``Loop Filter Flags``
.. tabularcolumns:: |p{7.0cm}|p{1.2cm}|p{9.1cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_VP8_LF_ADJ_ENABLE``
- 0x01
- Enable/disable macroblock-level loop filter adjustment.
* - ``V4L2_VP8_LF_DELTA_UPDATE``
- 0x02
- Indicates if the delta values used in an adjustment are updated.
* - ``V4L2_VP8_LF_FILTER_TYPE_SIMPLE``
- 0x04
- If set, indicates the filter type is simple.
If cleared, the filter type is normal.
.. c:type:: v4l2_vp8_quantization
.. tabularcolumns:: |p{1.5cm}|p{3.5cm}|p{12.3cm}|
.. flat-table:: struct v4l2_vp8_quantization
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``y_ac_qi``
- Luma AC coefficient table index.
* - __s8
- ``y_dc_delta``
- Luma DC delta value.
* - __s8
- ``y2_dc_delta``
- Y2 block DC delta value.
* - __s8
- ``y2_ac_delta``
- Y2 block AC delta value.
* - __s8
- ``uv_dc_delta``
- Chroma DC delta value.
* - __s8
- ``uv_ac_delta``
- Chroma AC delta value.
* - __u16
- ``padding``
- Applications and drivers must set this to zero.
.. c:type:: v4l2_vp8_entropy
.. cssclass:: longtable
.. tabularcolumns:: |p{1.5cm}|p{5.8cm}|p{10.0cm}|
.. flat-table:: struct v4l2_vp8_entropy
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``coeff_probs[4][8][3][11]``
- Coefficient update probabilities.
* - __u8
- ``y_mode_probs[4]``
- Luma mode update probabilities.
* - __u8
- ``uv_mode_probs[3]``
- Chroma mode update probabilities.
* - __u8
- ``mv_probs[2][19]``
- MV decoding update probabilities.
* - __u8
- ``padding[3]``
- Applications and drivers must set this to zero.
.. _v4l2-codec-stateless-mpeg2:
``V4L2_CID_STATELESS_MPEG2_SEQUENCE (struct)``
Specifies the sequence parameters (as extracted from the bitstream) for the
associated MPEG-2 slice data. This includes fields matching the syntax
elements from the sequence header and sequence extension parts of the
bitstream as specified by :ref:`mpeg2part2`.
.. c:type:: v4l2_ctrl_mpeg2_sequence
.. raw:: latex
\small
.. cssclass:: longtable
.. tabularcolumns:: |p{1.4cm}|p{6.5cm}|p{9.4cm}|
.. flat-table:: struct v4l2_ctrl_mpeg2_sequence
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u16
- ``horizontal_size``
- The width of the displayable part of the frame's luminance component.
* - __u16
- ``vertical_size``
- The height of the displayable part of the frame's luminance component.
* - __u32
- ``vbv_buffer_size``
- Used to calculate the required size of the video buffering verifier,
defined (in bits) as: 16 * 1024 * vbv_buffer_size.
* - __u16
- ``profile_and_level_indication``
- The current profile and level indication as extracted from the
bitstream.
* - __u8
- ``chroma_format``
- The chrominance sub-sampling format (1: 4:2:0, 2: 4:2:2, 3: 4:4:4).
* - __u8
- ``flags``
- See :ref:`MPEG-2 Sequence Flags <mpeg2_sequence_flags>`.
.. _mpeg2_sequence_flags:
``MPEG-2 Sequence Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_MPEG2_SEQ_FLAG_PROGRESSIVE``
- 0x01
- Indication that all the frames for the sequence are progressive instead
of interlaced.
.. raw:: latex
\normalsize
``V4L2_CID_STATELESS_MPEG2_PICTURE (struct)``
Specifies the picture parameters (as extracted from the bitstream) for the
associated MPEG-2 slice data. This includes fields matching the syntax
elements from the picture header and picture coding extension parts of the
bitstream as specified by :ref:`mpeg2part2`.
.. c:type:: v4l2_ctrl_mpeg2_picture
.. raw:: latex
\small
.. cssclass:: longtable
.. tabularcolumns:: |p{1.0cm}|p{5.6cm}|p{10.7cm}|
.. flat-table:: struct v4l2_ctrl_mpeg2_picture
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u64
- ``backward_ref_ts``
- Timestamp of the V4L2 capture buffer to use as backward reference, used
with B-coded and P-coded frames. The timestamp refers to the
``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the
:c:func:`v4l2_timeval_to_ns()` function to convert the struct
:c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64.
* - __u64
- ``forward_ref_ts``
- Timestamp for the V4L2 capture buffer to use as forward reference, used
with B-coded frames. The timestamp refers to the ``timestamp`` field in
struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
function to convert the struct :c:type:`timeval` in struct
:c:type:`v4l2_buffer` to a __u64.
* - __u32
- ``flags``
- See :ref:`MPEG-2 Picture Flags <mpeg2_picture_flags>`.
* - __u8
- ``f_code[2][2]``
- Motion vector codes.
* - __u8
- ``picture_coding_type``
- Picture coding type for the frame covered by the current slice
(V4L2_MPEG2_PIC_CODING_TYPE_I, V4L2_MPEG2_PIC_CODING_TYPE_P or
V4L2_MPEG2_PIC_CODING_TYPE_B).
* - __u8
- ``picture_structure``
- Picture structure (1: interlaced top field, 2: interlaced bottom field,
3: progressive frame).
* - __u8
- ``intra_dc_precision``
- Precision of Discrete Cosine transform (0: 8 bits precision,
1: 9 bits precision, 2: 10 bits precision, 3: 11 bits precision).
* - __u8
- ``reserved[5]``
- Applications and drivers must set this to zero.
.. _mpeg2_picture_flags:
``MPEG-2 Picture Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_MPEG2_PIC_FLAG_TOP_FIELD_FIRST``
- 0x00000001
- If set and it's an interlaced stream, top field is output first.
* - ``V4L2_MPEG2_PIC_FLAG_FRAME_PRED_DCT``
- 0x00000002
- If set only frame-DCT and frame prediction are used.
* - ``V4L2_MPEG2_PIC_FLAG_CONCEALMENT_MV``
- 0x00000004
- If set motion vectors are coded for intra macroblocks.
* - ``V4L2_MPEG2_PIC_FLAG_Q_SCALE_TYPE``
- 0x00000008
- This flag affects the inverse quantization process.
* - ``V4L2_MPEG2_PIC_FLAG_INTRA_VLC``
- 0x00000010
- This flag affects the decoding of transform coefficient data.
* - ``V4L2_MPEG2_PIC_FLAG_ALT_SCAN``
- 0x00000020
- This flag affects the decoding of transform coefficient data.
* - ``V4L2_MPEG2_PIC_FLAG_REPEAT_FIRST``
- 0x00000040
- This flag affects the decoding process of progressive frames.
* - ``V4L2_MPEG2_PIC_FLAG_PROGRESSIVE``
- 0x00000080
- Indicates whether the current frame is progressive.
.. raw:: latex
\normalsize
``V4L2_CID_STATELESS_MPEG2_QUANTISATION (struct)``
Specifies quantisation matrices, in zigzag scanning order, for the
associated MPEG-2 slice data. This control is initialized by the kernel
to the matrices default values. If a bitstream transmits a user-defined
quantisation matrices load, applications are expected to use this control.
Applications are also expected to set the control loading the default
values, if the quantisation matrices need to be reset, for instance on a
sequence header. This process is specified by section 6.3.7.
"Quant matrix extension" of the specification.
.. c:type:: v4l2_ctrl_mpeg2_quantisation
.. tabularcolumns:: |p{0.8cm}|p{8.0cm}|p{8.5cm}|
.. cssclass:: longtable
.. raw:: latex
\small
.. flat-table:: struct v4l2_ctrl_mpeg2_quantisation
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``intra_quantiser_matrix[64]``
- The quantisation matrix coefficients for intra-coded frames, in zigzag
scanning order. It is relevant for both luma and chroma components,
although it can be superseded by the chroma-specific matrix for
non-4:2:0 YUV formats.
* - __u8
- ``non_intra_quantiser_matrix[64]``
- The quantisation matrix coefficients for non-intra-coded frames, in
zigzag scanning order. It is relevant for both luma and chroma
components, although it can be superseded by the chroma-specific matrix
for non-4:2:0 YUV formats.
* - __u8
- ``chroma_intra_quantiser_matrix[64]``
- The quantisation matrix coefficients for the chominance component of
intra-coded frames, in zigzag scanning order. Only relevant for
non-4:2:0 YUV formats.
* - __u8
- ``chroma_non_intra_quantiser_matrix[64]``
- The quantisation matrix coefficients for the chrominance component of
non-intra-coded frames, in zigzag scanning order. Only relevant for
non-4:2:0 YUV formats.
.. raw:: latex
\normalsize
.. _v4l2-codec-stateless-vp9:
``V4L2_CID_STATELESS_VP9_COMPRESSED_HDR (struct)``
Stores VP9 probabilities updates as parsed from the current compressed frame
header. A value of zero in an array element means no update of the relevant
probability. Motion vector-related updates contain a new value or zero. All
other updates contain values translated with inv_map_table[] (see 6.3.5 in
:ref:`vp9`).
.. c:type:: v4l2_ctrl_vp9_compressed_hdr
.. tabularcolumns:: |p{1cm}|p{4.8cm}|p{11.4cm}|
.. cssclass:: longtable
.. flat-table:: struct v4l2_ctrl_vp9_compressed_hdr
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``tx_mode``
- Specifies the TX mode. See :ref:`TX Mode <vp9_tx_mode>` for more details.
* - __u8
- ``tx8[2][1]``
- TX 8x8 probabilities delta.
* - __u8
- ``tx16[2][2]``
- TX 16x16 probabilities delta.
* - __u8
- ``tx32[2][3]``
- TX 32x32 probabilities delta.
* - __u8
- ``coef[4][2][2][6][6][3]``
- Coefficient probabilities delta.
* - __u8
- ``skip[3]``
- Skip probabilities delta.
* - __u8
- ``inter_mode[7][3]``
- Inter prediction mode probabilities delta.
* - __u8
- ``interp_filter[4][2]``
- Interpolation filter probabilities delta.
* - __u8
- ``is_inter[4]``
- Is inter-block probabilities delta.
* - __u8
- ``comp_mode[5]``
- Compound prediction mode probabilities delta.
* - __u8
- ``single_ref[5][2]``
- Single reference probabilities delta.
* - __u8
- ``comp_ref[5]``
- Compound reference probabilities delta.
* - __u8
- ``y_mode[4][9]``
- Y prediction mode probabilities delta.
* - __u8
- ``uv_mode[10][9]``
- UV prediction mode probabilities delta.
* - __u8
- ``partition[16][3]``
- Partition probabilities delta.
* - __u8
- ``mv.joint[3]``
- Motion vector joint probabilities delta.
* - __u8
- ``mv.sign[2]``
- Motion vector sign probabilities delta.
* - __u8
- ``mv.classes[2][10]``
- Motion vector class probabilities delta.
* - __u8
- ``mv.class0_bit[2]``
- Motion vector class0 bit probabilities delta.
* - __u8
- ``mv.bits[2][10]``
- Motion vector bits probabilities delta.
* - __u8
- ``mv.class0_fr[2][2][3]``
- Motion vector class0 fractional bit probabilities delta.
* - __u8
- ``mv.fr[2][3]``
- Motion vector fractional bit probabilities delta.
* - __u8
- ``mv.class0_hp[2]``
- Motion vector class0 high precision fractional bit probabilities delta.
* - __u8
- ``mv.hp[2]``
- Motion vector high precision fractional bit probabilities delta.
.. _vp9_tx_mode:
``TX Mode``
.. tabularcolumns:: |p{6.5cm}|p{0.5cm}|p{10.3cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_VP9_TX_MODE_ONLY_4X4``
- 0
- Transform size is 4x4.
* - ``V4L2_VP9_TX_MODE_ALLOW_8X8``
- 1
- Transform size can be up to 8x8.
* - ``V4L2_VP9_TX_MODE_ALLOW_16X16``
- 2
- Transform size can be up to 16x16.
* - ``V4L2_VP9_TX_MODE_ALLOW_32X32``
- 3
- transform size can be up to 32x32.
* - ``V4L2_VP9_TX_MODE_SELECT``
- 4
- Bitstream contains the transform size for each block.
See section '7.3.1 Tx mode semantics' of the :ref:`vp9` specification for more details.
``V4L2_CID_STATELESS_VP9_FRAME (struct)``
Specifies the frame parameters for the associated VP9 frame decode request.
This includes the necessary parameters for configuring a stateless hardware
decoding pipeline for VP9. The bitstream parameters are defined according
to :ref:`vp9`.
.. c:type:: v4l2_ctrl_vp9_frame
.. raw:: latex
\small
.. tabularcolumns:: |p{4.7cm}|p{5.5cm}|p{7.1cm}|
.. cssclass:: longtable
.. flat-table:: struct v4l2_ctrl_vp9_frame
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - struct :c:type:`v4l2_vp9_loop_filter`
- ``lf``
- Loop filter parameters. See struct :c:type:`v4l2_vp9_loop_filter` for more details.
* - struct :c:type:`v4l2_vp9_quantization`
- ``quant``
- Quantization parameters. See :c:type:`v4l2_vp9_quantization` for more details.
* - struct :c:type:`v4l2_vp9_segmentation`
- ``seg``
- Segmentation parameters. See :c:type:`v4l2_vp9_segmentation` for more details.
* - __u32
- ``flags``
- Combination of V4L2_VP9_FRAME_FLAG_* flags. See :ref:`Frame Flags<vp9_frame_flags>`.
* - __u16
- ``compressed_header_size``
- Compressed header size in bytes.
* - __u16
- ``uncompressed_header_size``
- Uncompressed header size in bytes.
* - __u16
- ``frame_width_minus_1``
- Add 1 to get the frame width expressed in pixels. See section 7.2.3 in :ref:`vp9`.
* - __u16
- ``frame_height_minus_1``
- Add 1 to get the frame height expressed in pixels. See section 7.2.3 in :ref:`vp9`.
* - __u16
- ``render_width_minus_1``
- Add 1 to get the expected render width expressed in pixels. This is
not used during the decoding process but might be used by HW scalers to
prepare a frame that's ready for scanout. See section 7.2.4 in :ref:`vp9`.
* - __u16
- render_height_minus_1
- Add 1 to get the expected render height expressed in pixels. This is
not used during the decoding process but might be used by HW scalers to
prepare a frame that's ready for scanout. See section 7.2.4 in :ref:`vp9`.
* - __u64
- ``last_frame_ts``
- "last" reference buffer timestamp.
The timestamp refers to the ``timestamp`` field in
struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
function to convert the struct :c:type:`timeval` in struct
:c:type:`v4l2_buffer` to a __u64.
* - __u64
- ``golden_frame_ts``
- "golden" reference buffer timestamp.
The timestamp refers to the ``timestamp`` field in
struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
function to convert the struct :c:type:`timeval` in struct
:c:type:`v4l2_buffer` to a __u64.
* - __u64
- ``alt_frame_ts``
- "alt" reference buffer timestamp.
The timestamp refers to the ``timestamp`` field in
struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
function to convert the struct :c:type:`timeval` in struct
:c:type:`v4l2_buffer` to a __u64.
* - __u8
- ``ref_frame_sign_bias``
- a bitfield specifying whether the sign bias is set for a given
reference frame. See :ref:`Reference Frame Sign Bias<vp9_ref_frame_sign_bias>`
for more details.
* - __u8
- ``reset_frame_context``
- specifies whether the frame context should be reset to default values. See
:ref:`Reset Frame Context<vp9_reset_frame_context>` for more details.
* - __u8
- ``frame_context_idx``
- Frame context that should be used/updated.
* - __u8
- ``profile``
- VP9 profile. Can be 0, 1, 2 or 3.
* - __u8
- ``bit_depth``
- Component depth in bits. Can be 8, 10 or 12. Note that not all profiles
support 10 and/or 12 bits depths.
* - __u8
- ``interpolation_filter``
- Specifies the filter selection used for performing inter prediction. See
:ref:`Interpolation Filter<vp9_interpolation_filter>` for more details.
* - __u8
- ``tile_cols_log2``
- Specifies the base 2 logarithm of the width of each tile (where the
width is measured in units of 8x8 blocks). Shall be less than or equal
to 6.
* - __u8
- ``tile_rows_log2``
- Specifies the base 2 logarithm of the height of each tile (where the
height is measured in units of 8x8 blocks).
* - __u8
- ``reference_mode``
- Specifies the type of inter prediction to be used. See
:ref:`Reference Mode<vp9_reference_mode>` for more details. Note that
this is derived as part of the compressed header parsing process and
for this reason should have been part of
:c:type: `v4l2_ctrl_vp9_compressed_hdr` optional control. It is safe to
set this value to zero if the driver does not require compressed
headers.
* - __u8
- ``reserved[7]``
- Applications and drivers must set this to zero.
.. raw:: latex
\normalsize
.. _vp9_frame_flags:
``Frame Flags``
.. tabularcolumns:: |p{10.0cm}|p{1.2cm}|p{6.1cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_VP9_FRAME_FLAG_KEY_FRAME``
- 0x001
- The frame is a key frame.
* - ``V4L2_VP9_FRAME_FLAG_SHOW_FRAME``
- 0x002
- The frame should be displayed.
* - ``V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT``
- 0x004
- The decoding should be error resilient.
* - ``V4L2_VP9_FRAME_FLAG_INTRA_ONLY``
- 0x008
- The frame does not reference other frames.
* - ``V4L2_VP9_FRAME_FLAG_ALLOW_HIGH_PREC_MV``
- 0x010
- The frame can use high precision motion vectors.
* - ``V4L2_VP9_FRAME_FLAG_REFRESH_FRAME_CTX``
- 0x020
- Frame context should be updated after decoding.
* - ``V4L2_VP9_FRAME_FLAG_PARALLEL_DEC_MODE``
- 0x040
- Parallel decoding is used.
* - ``V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING``
- 0x080
- Vertical subsampling is enabled.
* - ``V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING``
- 0x100
- Horizontal subsampling is enabled.
* - ``V4L2_VP9_FRAME_FLAG_COLOR_RANGE_FULL_SWING``
- 0x200
- The full UV range is used.
.. _vp9_ref_frame_sign_bias:
``Reference Frame Sign Bias``
.. tabularcolumns:: |p{7.0cm}|p{1.2cm}|p{9.1cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_VP9_SIGN_BIAS_LAST``
- 0x1
- Sign bias is set for the last reference frame.
* - ``V4L2_VP9_SIGN_BIAS_GOLDEN``
- 0x2
- Sign bias is set for the golden reference frame.
* - ``V4L2_VP9_SIGN_BIAS_ALT``
- 0x2
- Sign bias is set for the alt reference frame.
.. _vp9_reset_frame_context:
``Reset Frame Context``
.. tabularcolumns:: |p{7.0cm}|p{1.2cm}|p{9.1cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_VP9_RESET_FRAME_CTX_NONE``
- 0
- Do not reset any frame context.
* - ``V4L2_VP9_RESET_FRAME_CTX_SPEC``
- 1
- Reset the frame context pointed to by
:c:type:`v4l2_ctrl_vp9_frame`.frame_context_idx.
* - ``V4L2_VP9_RESET_FRAME_CTX_ALL``
- 2
- Reset all frame contexts.
See section '7.2 Uncompressed header semantics' of the :ref:`vp9` specification
for more details.
.. _vp9_interpolation_filter:
``Interpolation Filter``
.. tabularcolumns:: |p{9.0cm}|p{1.2cm}|p{7.1cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_VP9_INTERP_FILTER_EIGHTTAP``
- 0
- Eight tap filter.
* - ``V4L2_VP9_INTERP_FILTER_EIGHTTAP_SMOOTH``
- 1
- Eight tap smooth filter.
* - ``V4L2_VP9_INTERP_FILTER_EIGHTTAP_SHARP``
- 2
- Eeight tap sharp filter.
* - ``V4L2_VP9_INTERP_FILTER_BILINEAR``
- 3
- Bilinear filter.
* - ``V4L2_VP9_INTERP_FILTER_SWITCHABLE``
- 4
- Filter selection is signaled at the block level.
See section '7.2.7 Interpolation filter semantics' of the :ref:`vp9` specification
for more details.
.. _vp9_reference_mode:
``Reference Mode``
.. tabularcolumns:: |p{9.6cm}|p{0.5cm}|p{7.2cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_VP9_REFERENCE_MODE_SINGLE_REFERENCE``
- 0
- Indicates that all the inter blocks use only a single reference frame
to generate motion compensated prediction.
* - ``V4L2_VP9_REFERENCE_MODE_COMPOUND_REFERENCE``
- 1
- Requires all the inter blocks to use compound mode. Single reference
frame prediction is not allowed.
* - ``V4L2_VP9_REFERENCE_MODE_SELECT``
- 2
- Allows each individual inter block to select between single and
compound prediction modes.
See section '7.3.6 Frame reference mode semantics' of the :ref:`vp9` specification for more details.
.. c:type:: v4l2_vp9_segmentation
Encodes the quantization parameters. See section '7.2.10 Segmentation
params syntax' of the :ref:`vp9` specification for more details.
.. tabularcolumns:: |p{0.8cm}|p{5cm}|p{11.4cm}|
.. cssclass:: longtable
.. flat-table:: struct v4l2_vp9_segmentation
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``feature_data[8][4]``
- Data attached to each feature. Data entry is only valid if the feature
is enabled. The array shall be indexed with segment number as the first dimension
(0..7) and one of V4L2_VP9_SEG_* as the second dimension.
See :ref:`Segment Feature IDs<vp9_segment_feature>`.
* - __u8
- ``feature_enabled[8]``
- Bitmask defining which features are enabled in each segment. The value for each
segment is a combination of V4L2_VP9_SEGMENT_FEATURE_ENABLED(id) values where id is
one of V4L2_VP9_SEG_*. See :ref:`Segment Feature IDs<vp9_segment_feature>`.
* - __u8
- ``tree_probs[7]``
- Specifies the probability values to be used when decoding a Segment-ID.
See '5.15 Segmentation map' section of :ref:`vp9` for more details.
* - __u8
- ``pred_probs[3]``
- Specifies the probability values to be used when decoding a
Predicted-Segment-ID. See '6.4.14 Get segment id syntax'
section of :ref:`vp9` for more details.
* - __u8
- ``flags``
- Combination of V4L2_VP9_SEGMENTATION_FLAG_* flags. See
:ref:`Segmentation Flags<vp9_segmentation_flags>`.
* - __u8
- ``reserved[5]``
- Applications and drivers must set this to zero.
.. _vp9_segment_feature:
``Segment feature IDs``
.. tabularcolumns:: |p{6.0cm}|p{1cm}|p{10.3cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_VP9_SEG_LVL_ALT_Q``
- 0
- Quantizer segment feature.
* - ``V4L2_VP9_SEG_LVL_ALT_L``
- 1
- Loop filter segment feature.
* - ``V4L2_VP9_SEG_LVL_REF_FRAME``
- 2
- Reference frame segment feature.
* - ``V4L2_VP9_SEG_LVL_SKIP``
- 3
- Skip segment feature.
* - ``V4L2_VP9_SEG_LVL_MAX``
- 4
- Number of segment features.
.. _vp9_segmentation_flags:
``Segmentation Flags``
.. tabularcolumns:: |p{10.6cm}|p{0.8cm}|p{5.9cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_VP9_SEGMENTATION_FLAG_ENABLED``
- 0x01
- Indicates that this frame makes use of the segmentation tool.
* - ``V4L2_VP9_SEGMENTATION_FLAG_UPDATE_MAP``
- 0x02
- Indicates that the segmentation map should be updated during the
decoding of this frame.
* - ``V4L2_VP9_SEGMENTATION_FLAG_TEMPORAL_UPDATE``
- 0x04
- Indicates that the updates to the segmentation map are coded
relative to the existing segmentation map.
* - ``V4L2_VP9_SEGMENTATION_FLAG_UPDATE_DATA``
- 0x08
- Indicates that new parameters are about to be specified for each
segment.
* - ``V4L2_VP9_SEGMENTATION_FLAG_ABS_OR_DELTA_UPDATE``
- 0x10
- Indicates that the segmentation parameters represent the actual values
to be used.
.. c:type:: v4l2_vp9_quantization
Encodes the quantization parameters. See section '7.2.9 Quantization params
syntax' of the VP9 specification for more details.
.. tabularcolumns:: |p{0.8cm}|p{4cm}|p{12.4cm}|
.. cssclass:: longtable
.. flat-table:: struct v4l2_vp9_quantization
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``base_q_idx``
- Indicates the base frame qindex.
* - __s8
- ``delta_q_y_dc``
- Indicates the Y DC quantizer relative to base_q_idx.
* - __s8
- ``delta_q_uv_dc``
- Indicates the UV DC quantizer relative to base_q_idx.
* - __s8
- ``delta_q_uv_ac``
- Indicates the UV AC quantizer relative to base_q_idx.
* - __u8
- ``reserved[4]``
- Applications and drivers must set this to zero.
.. c:type:: v4l2_vp9_loop_filter
This structure contains all loop filter related parameters. See sections
'7.2.8 Loop filter semantics' of the :ref:`vp9` specification for more details.
.. tabularcolumns:: |p{0.8cm}|p{4cm}|p{12.4cm}|
.. cssclass:: longtable
.. flat-table:: struct v4l2_vp9_loop_filter
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __s8
- ``ref_deltas[4]``
- Contains the adjustment needed for the filter level based on the chosen
reference frame.
* - __s8
- ``mode_deltas[2]``
- Contains the adjustment needed for the filter level based on the chosen
mode.
* - __u8
- ``level``
- Indicates the loop filter strength.
* - __u8
- ``sharpness``
- Indicates the sharpness level.
* - __u8
- ``flags``
- Combination of V4L2_VP9_LOOP_FILTER_FLAG_* flags.
See :ref:`Loop Filter Flags <vp9_loop_filter_flags>`.
* - __u8
- ``reserved[7]``
- Applications and drivers must set this to zero.
.. _vp9_loop_filter_flags:
``Loop Filter Flags``
.. tabularcolumns:: |p{9.6cm}|p{0.5cm}|p{7.2cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_VP9_LOOP_FILTER_FLAG_DELTA_ENABLED``
- 0x1
- When set, the filter level depends on the mode and reference frame used
to predict a block.
* - ``V4L2_VP9_LOOP_FILTER_FLAG_DELTA_UPDATE``
- 0x2
- When set, the bitstream contains additional syntax elements that
specify which mode and reference frame deltas are to be updated.
.. _v4l2-codec-stateless-hevc:
``V4L2_CID_STATELESS_HEVC_SPS (struct)``
Specifies the Sequence Parameter Set fields (as extracted from the
bitstream) for the associated HEVC slice data.
These bitstream parameters are defined according to :ref:`hevc`.
They are described in section 7.4.3.2 "Sequence parameter set RBSP
semantics" of the specification.
.. c:type:: v4l2_ctrl_hevc_sps
.. raw:: latex
\small
.. tabularcolumns:: |p{1.2cm}|p{9.2cm}|p{6.9cm}|
.. cssclass:: longtable
.. flat-table:: struct v4l2_ctrl_hevc_sps
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``video_parameter_set_id``
- Specifies the value of the vps_video_parameter_set_id of the active VPS
as described in section "7.4.3.2.1 General sequence parameter set RBSP semantics"
of H.265 specifications.
* - __u8
- ``seq_parameter_set_id``
- Provides an identifier for the SPS for reference by other syntax elements
as described in section "7.4.3.2.1 General sequence parameter set RBSP semantics"
of H.265 specifications.
* - __u16
- ``pic_width_in_luma_samples``
- Specifies the width of each decoded picture in units of luma samples.
* - __u16
- ``pic_height_in_luma_samples``
- Specifies the height of each decoded picture in units of luma samples.
* - __u8
- ``bit_depth_luma_minus8``
- This value plus 8 specifies the bit depth of the samples of the luma array.
* - __u8
- ``bit_depth_chroma_minus8``
- This value plus 8 specifies the bit depth of the samples of the chroma arrays.
* - __u8
- ``log2_max_pic_order_cnt_lsb_minus4``
- Specifies the value of the variable MaxPicOrderCntLsb.
* - __u8
- ``sps_max_dec_pic_buffering_minus1``
- This value plus 1 specifies the maximum required size of the decoded picture buffer for
the coded video sequence (CVS).
* - __u8
- ``sps_max_num_reorder_pics``
- Indicates the maximum allowed number of pictures.
* - __u8
- ``sps_max_latency_increase_plus1``
- Used to signal MaxLatencyPictures, which indicates the maximum number of
pictures that can precede any picture in output order and follow that
picture in decoding order.
* - __u8
- ``log2_min_luma_coding_block_size_minus3``
- This value plus 3 specifies the minimum luma coding block size.
* - __u8
- ``log2_diff_max_min_luma_coding_block_size``
- Specifies the difference between the maximum and minimum luma coding block size.
* - __u8
- ``log2_min_luma_transform_block_size_minus2``
- This value plus 2 specifies the minimum luma transform block size.
* - __u8
- ``log2_diff_max_min_luma_transform_block_size``
- Specifies the difference between the maximum and minimum luma transform block size.
* - __u8
- ``max_transform_hierarchy_depth_inter``
- Specifies the maximum hierarchy depth for transform units of coding units coded
in inter prediction mode.
* - __u8
- ``max_transform_hierarchy_depth_intra``
- Specifies the maximum hierarchy depth for transform units of coding units coded in
intra prediction mode.
* - __u8
- ``pcm_sample_bit_depth_luma_minus1``
- This value plus 1 specifies the number of bits used to represent each of PCM sample values of the
luma component.
* - __u8
- ``pcm_sample_bit_depth_chroma_minus1``
- Specifies the number of bits used to represent each of PCM sample values of
the chroma components.
* - __u8
- ``log2_min_pcm_luma_coding_block_size_minus3``
- Plus 3 specifies the minimum size of coding blocks.
* - __u8
- ``log2_diff_max_min_pcm_luma_coding_block_size``
- Specifies the difference between the maximum and minimum size of coding blocks.
* - __u8
- ``num_short_term_ref_pic_sets``
- Specifies the number of st_ref_pic_set() syntax structures included in the SPS.
* - __u8
- ``num_long_term_ref_pics_sps``
- Specifies the number of candidate long-term reference pictures that are
specified in the SPS.
* - __u8
- ``chroma_format_idc``
- Specifies the chroma sampling.
* - __u8
- ``sps_max_sub_layers_minus1``
- This value plus 1 specifies the maximum number of temporal sub-layers.
* - __u64
- ``flags``
- See :ref:`Sequence Parameter Set Flags <hevc_sps_flags>`
.. raw:: latex
\normalsize
.. _hevc_sps_flags:
``Sequence Parameter Set Flags``
.. raw:: latex
\small
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_HEVC_SPS_FLAG_SEPARATE_COLOUR_PLANE``
- 0x00000001
-
* - ``V4L2_HEVC_SPS_FLAG_SCALING_LIST_ENABLED``
- 0x00000002
-
* - ``V4L2_HEVC_SPS_FLAG_AMP_ENABLED``
- 0x00000004
-
* - ``V4L2_HEVC_SPS_FLAG_SAMPLE_ADAPTIVE_OFFSET``
- 0x00000008
-
* - ``V4L2_HEVC_SPS_FLAG_PCM_ENABLED``
- 0x00000010
-
* - ``V4L2_HEVC_SPS_FLAG_PCM_LOOP_FILTER_DISABLED``
- 0x00000020
-
* - ``V4L2_HEVC_SPS_FLAG_LONG_TERM_REF_PICS_PRESENT``
- 0x00000040
-
* - ``V4L2_HEVC_SPS_FLAG_SPS_TEMPORAL_MVP_ENABLED``
- 0x00000080
-
* - ``V4L2_HEVC_SPS_FLAG_STRONG_INTRA_SMOOTHING_ENABLED``
- 0x00000100
-
.. raw:: latex
\normalsize
``V4L2_CID_STATELESS_HEVC_PPS (struct)``
Specifies the Picture Parameter Set fields (as extracted from the
bitstream) for the associated HEVC slice data.
These bitstream parameters are defined according to :ref:`hevc`.
They are described in section 7.4.3.3 "Picture parameter set RBSP
semantics" of the specification.
.. c:type:: v4l2_ctrl_hevc_pps
.. tabularcolumns:: |p{1.2cm}|p{8.6cm}|p{7.5cm}|
.. cssclass:: longtable
.. flat-table:: struct v4l2_ctrl_hevc_pps
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``pic_parameter_set_id``
- Identifies the PPS for reference by other syntax elements.
* - __u8
- ``num_extra_slice_header_bits``
- Specifies the number of extra slice header bits that are present
in the slice header RBSP for coded pictures referring to the PPS.
* - __u8
- ``num_ref_idx_l0_default_active_minus1``
- This value plus 1 specifies the inferred value of num_ref_idx_l0_active_minus1.
* - __u8
- ``num_ref_idx_l1_default_active_minus1``
- This value plus 1 specifies the inferred value of num_ref_idx_l1_active_minus1.
* - __s8
- ``init_qp_minus26``
- This value plus 26 specifies the initial value of SliceQp Y for each slice
referring to the PPS.
* - __u8
- ``diff_cu_qp_delta_depth``
- Specifies the difference between the luma coding tree block size
and the minimum luma coding block size of coding units that
convey cu_qp_delta_abs and cu_qp_delta_sign_flag.
* - __s8
- ``pps_cb_qp_offset``
- Specifies the offsets to the luma quantization parameter Cb.
* - __s8
- ``pps_cr_qp_offset``
- Specifies the offsets to the luma quantization parameter Cr.
* - __u8
- ``num_tile_columns_minus1``
- This value plus 1 specifies the number of tile columns partitioning the picture.
* - __u8
- ``num_tile_rows_minus1``
- This value plus 1 specifies the number of tile rows partitioning the picture.
* - __u8
- ``column_width_minus1[20]``
- This value plus 1 specifies the width of the i-th tile column in units of
coding tree blocks.
* - __u8
- ``row_height_minus1[22]``
- This value plus 1 specifies the height of the i-th tile row in units of coding
tree blocks.
* - __s8
- ``pps_beta_offset_div2``
- Specifies the default deblocking parameter offsets for beta divided by 2.
* - __s8
- ``pps_tc_offset_div2``
- Specifies the default deblocking parameter offsets for tC divided by 2.
* - __u8
- ``log2_parallel_merge_level_minus2``
- This value plus 2 specifies the value of the variable Log2ParMrgLevel.
* - __u8
- ``padding[4]``
- Applications and drivers must set this to zero.
* - __u64
- ``flags``
- See :ref:`Picture Parameter Set Flags <hevc_pps_flags>`
.. _hevc_pps_flags:
``Picture Parameter Set Flags``
.. raw:: latex
\small
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_HEVC_PPS_FLAG_DEPENDENT_SLICE_SEGMENT_ENABLED``
- 0x00000001
-
* - ``V4L2_HEVC_PPS_FLAG_OUTPUT_FLAG_PRESENT``
- 0x00000002
-
* - ``V4L2_HEVC_PPS_FLAG_SIGN_DATA_HIDING_ENABLED``
- 0x00000004
-
* - ``V4L2_HEVC_PPS_FLAG_CABAC_INIT_PRESENT``
- 0x00000008
-
* - ``V4L2_HEVC_PPS_FLAG_CONSTRAINED_INTRA_PRED``
- 0x00000010
-
* - ``V4L2_HEVC_PPS_FLAG_TRANSFORM_SKIP_ENABLED``
- 0x00000020
-
* - ``V4L2_HEVC_PPS_FLAG_CU_QP_DELTA_ENABLED``
- 0x00000040
-
* - ``V4L2_HEVC_PPS_FLAG_PPS_SLICE_CHROMA_QP_OFFSETS_PRESENT``
- 0x00000080
-
* - ``V4L2_HEVC_PPS_FLAG_WEIGHTED_PRED``
- 0x00000100
-
* - ``V4L2_HEVC_PPS_FLAG_WEIGHTED_BIPRED``
- 0x00000200
-
* - ``V4L2_HEVC_PPS_FLAG_TRANSQUANT_BYPASS_ENABLED``
- 0x00000400
-
* - ``V4L2_HEVC_PPS_FLAG_TILES_ENABLED``
- 0x00000800
-
* - ``V4L2_HEVC_PPS_FLAG_ENTROPY_CODING_SYNC_ENABLED``
- 0x00001000
-
* - ``V4L2_HEVC_PPS_FLAG_LOOP_FILTER_ACROSS_TILES_ENABLED``
- 0x00002000
-
* - ``V4L2_HEVC_PPS_FLAG_PPS_LOOP_FILTER_ACROSS_SLICES_ENABLED``
- 0x00004000
-
* - ``V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_OVERRIDE_ENABLED``
- 0x00008000
-
* - ``V4L2_HEVC_PPS_FLAG_PPS_DISABLE_DEBLOCKING_FILTER``
- 0x00010000
-
* - ``V4L2_HEVC_PPS_FLAG_LISTS_MODIFICATION_PRESENT``
- 0x00020000
-
* - ``V4L2_HEVC_PPS_FLAG_SLICE_SEGMENT_HEADER_EXTENSION_PRESENT``
- 0x00040000
-
* - ``V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT``
- 0x00080000
- Specifies the presence of deblocking filter control syntax elements in
the PPS
* - ``V4L2_HEVC_PPS_FLAG_UNIFORM_SPACING``
- 0x00100000
- Specifies that tile column boundaries and likewise tile row boundaries
are distributed uniformly across the picture
.. raw:: latex
\normalsize
``V4L2_CID_STATELESS_HEVC_SLICE_PARAMS (struct)``
Specifies various slice-specific parameters, especially from the NAL unit
header, general slice segment header and weighted prediction parameter
parts of the bitstream.
These bitstream parameters are defined according to :ref:`hevc`.
They are described in section 7.4.7 "General slice segment header
semantics" of the specification.
This control is a dynamically sized 1-dimensional array,
V4L2_CTRL_FLAG_DYNAMIC_ARRAY flag must be set when using it.
.. c:type:: v4l2_ctrl_hevc_slice_params
.. raw:: latex
\scriptsize
.. tabularcolumns:: |p{5.4cm}|p{6.8cm}|p{5.1cm}|
.. cssclass:: longtable
.. flat-table:: struct v4l2_ctrl_hevc_slice_params
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u32
- ``bit_size``
- Size (in bits) of the current slice data.
* - __u32
- ``data_byte_offset``
- Offset (in byte) to the video data in the current slice data.
* - __u32
- ``num_entry_point_offsets``
- Specifies the number of entry point offset syntax elements in the slice header.
When the driver supports it, the ``V4L2_CID_STATELESS_HEVC_ENTRY_POINT_OFFSETS``
must be set.
* - __u8
- ``nal_unit_type``
- Specifies the coding type of the slice (B, P or I).
* - __u8
- ``nuh_temporal_id_plus1``
- Minus 1 specifies a temporal identifier for the NAL unit.
* - __u8
- ``slice_type``
-
(V4L2_HEVC_SLICE_TYPE_I, V4L2_HEVC_SLICE_TYPE_P or
V4L2_HEVC_SLICE_TYPE_B).
* - __u8
- ``colour_plane_id``
- Specifies the colour plane associated with the current slice.
* - __s32
- ``slice_pic_order_cnt``
- Specifies the picture order count.
* - __u8
- ``num_ref_idx_l0_active_minus1``
- This value plus 1 specifies the maximum reference index for reference picture list 0
that may be used to decode the slice.
* - __u8
- ``num_ref_idx_l1_active_minus1``
- This value plus 1 specifies the maximum reference index for reference picture list 1
that may be used to decode the slice.
* - __u8
- ``collocated_ref_idx``
- Specifies the reference index of the collocated picture used for
temporal motion vector prediction.
* - __u8
- ``five_minus_max_num_merge_cand``
- Specifies the maximum number of merging motion vector prediction
candidates supported in the slice subtracted from 5.
* - __s8
- ``slice_qp_delta``
- Specifies the initial value of QpY to be used for the coding blocks in the slice.
* - __s8
- ``slice_cb_qp_offset``
- Specifies a difference to be added to the value of pps_cb_qp_offset.
* - __s8
- ``slice_cr_qp_offset``
- Specifies a difference to be added to the value of pps_cr_qp_offset.
* - __s8
- ``slice_act_y_qp_offset``
- Specifies the offset to the luma of quantization parameter qP derived in section 8.6.2
* - __s8
- ``slice_act_cb_qp_offset``
- Specifies the offset to the cb of quantization parameter qP derived in section 8.6.2
* - __s8
- ``slice_act_cr_qp_offset``
- Specifies the offset to the cr of quantization parameter qP derived in section 8.6.2
* - __s8
- ``slice_beta_offset_div2``
- Specifies the deblocking parameter offsets for beta divided by 2.
* - __s8
- ``slice_tc_offset_div2``
- Specifies the deblocking parameter offsets for tC divided by 2.
* - __u8
- ``pic_struct``
- Indicates whether a picture should be displayed as a frame or as one or more fields.
* - __u32
- ``slice_segment_addr``
- Specifies the address of the first coding tree block in the slice segment.
* - __u8
- ``ref_idx_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
- The list of L0 reference elements as indices in the DPB.
* - __u8
- ``ref_idx_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
- The list of L1 reference elements as indices in the DPB.
* - __u16
- ``short_term_ref_pic_set_size``
- Specifies the size, in bits, of the short-term reference picture set, described as st_ref_pic_set()
in the specification, included in the slice header or SPS (section 7.3.6.1).
* - __u16
- ``long_term_ref_pic_set_size``
- Specifies the size, in bits, of the long-term reference picture set include in the slice header
or SPS. It is the number of bits in the conditional block if(long_term_ref_pics_present_flag)
in section 7.3.6.1 of the specification.
* - __u8
- ``padding``
- Applications and drivers must set this to zero.
* - struct :c:type:`v4l2_hevc_pred_weight_table`
- ``pred_weight_table``
- The prediction weight coefficients for inter-picture prediction.
* - __u64
- ``flags``
- See :ref:`Slice Parameters Flags <hevc_slice_params_flags>`
.. raw:: latex
\normalsize
.. _hevc_slice_params_flags:
``Slice Parameters Flags``
.. raw:: latex
\scriptsize
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_LUMA``
- 0x00000001
-
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_CHROMA``
- 0x00000002
-
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_TEMPORAL_MVP_ENABLED``
- 0x00000004
-
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_MVD_L1_ZERO``
- 0x00000008
-
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_CABAC_INIT``
- 0x00000010
-
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_COLLOCATED_FROM_L0``
- 0x00000020
-
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_USE_INTEGER_MV``
- 0x00000040
-
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_DEBLOCKING_FILTER_DISABLED``
- 0x00000080
-
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_LOOP_FILTER_ACROSS_SLICES_ENABLED``
- 0x00000100
-
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_DEPENDENT_SLICE_SEGMENT``
- 0x00000200
-
.. raw:: latex
\normalsize
``V4L2_CID_STATELESS_HEVC_ENTRY_POINT_OFFSETS (integer)``
Specifies entry point offsets in bytes.
This control is a dynamically sized array. The number of entry point
offsets is reported by the ``elems`` field.
This bitstream parameter is defined according to :ref:`hevc`.
They are described in section 7.4.7.1 "General slice segment header
semantics" of the specification.
When multiple slices are submitted in a request, the length of
this array must be the sum of num_entry_point_offsets of all the
slices in the request.
``V4L2_CID_STATELESS_HEVC_SCALING_MATRIX (struct)``
Specifies the HEVC scaling matrix parameters used for the scaling process
for transform coefficients.
These matrix and parameters are defined according to :ref:`hevc`.
They are described in section 7.4.5 "Scaling list data semantics" of
the specification.
.. c:type:: v4l2_ctrl_hevc_scaling_matrix
.. raw:: latex
\scriptsize
.. tabularcolumns:: |p{5.4cm}|p{6.8cm}|p{5.1cm}|
.. cssclass:: longtable
.. flat-table:: struct v4l2_ctrl_hevc_scaling_matrix
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``scaling_list_4x4[6][16]``
- Scaling list is used for the scaling process for transform
coefficients. The values on each scaling list are expected
in raster scan order.
* - __u8
- ``scaling_list_8x8[6][64]``
- Scaling list is used for the scaling process for transform
coefficients. The values on each scaling list are expected
in raster scan order.
* - __u8
- ``scaling_list_16x16[6][64]``
- Scaling list is used for the scaling process for transform
coefficients. The values on each scaling list are expected
in raster scan order.
* - __u8
- ``scaling_list_32x32[2][64]``
- Scaling list is used for the scaling process for transform
coefficients. The values on each scaling list are expected
in raster scan order.
* - __u8
- ``scaling_list_dc_coef_16x16[6]``
- Scaling list is used for the scaling process for transform
coefficients. The values on each scaling list are expected
in raster scan order.
* - __u8
- ``scaling_list_dc_coef_32x32[2]``
- Scaling list is used for the scaling process for transform
coefficients. The values on each scaling list are expected
in raster scan order.
.. raw:: latex
\normalsize
.. c:type:: v4l2_hevc_dpb_entry
.. raw:: latex
\small
.. tabularcolumns:: |p{1.0cm}|p{4.2cm}|p{12.1cm}|
.. flat-table:: struct v4l2_hevc_dpb_entry
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u64
- ``timestamp``
- Timestamp of the V4L2 capture buffer to use as reference, used
with B-coded and P-coded frames. The timestamp refers to the
``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the
:c:func:`v4l2_timeval_to_ns()` function to convert the struct
:c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64.
* - __u8
- ``flags``
- Long term flag for the reference frame
(V4L2_HEVC_DPB_ENTRY_LONG_TERM_REFERENCE). The flag is set as
described in the ITU HEVC specification chapter "8.3.2 Decoding
process for reference picture set".
* - __u8
- ``field_pic``
- Whether the reference is a field picture or a frame.
See :ref:`HEVC dpb field pic Flags <hevc_dpb_field_pic_flags>`
* - __s32
- ``pic_order_cnt_val``
- The picture order count of the current picture.
* - __u8
- ``padding[2]``
- Applications and drivers must set this to zero.
.. raw:: latex
\normalsize
.. _hevc_dpb_field_pic_flags:
``HEVC dpb field pic Flags``
.. raw:: latex
\scriptsize
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_HEVC_SEI_PIC_STRUCT_FRAME``
- 0
- (progressive) Frame
* - ``V4L2_HEVC_SEI_PIC_STRUCT_TOP_FIELD``
- 1
- Top field
* - ``V4L2_HEVC_SEI_PIC_STRUCT_BOTTOM_FIELD``
- 2
- Bottom field
* - ``V4L2_HEVC_SEI_PIC_STRUCT_TOP_BOTTOM``
- 3
- Top field, bottom field, in that order
* - ``V4L2_HEVC_SEI_PIC_STRUCT_BOTTOM_TOP``
- 4
- Bottom field, top field, in that order
* - ``V4L2_HEVC_SEI_PIC_STRUCT_TOP_BOTTOM_TOP``
- 5
- Top field, bottom field, top field repeated, in that order
* - ``V4L2_HEVC_SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM``
- 6
- Bottom field, top field, bottom field repeated, in that order
* - ``V4L2_HEVC_SEI_PIC_STRUCT_FRAME_DOUBLING``
- 7
- Frame doubling
* - ``V4L2_HEVC_SEI_PIC_STRUCT_FRAME_TRIPLING``
- 8
- Frame tripling
* - ``V4L2_HEVC_SEI_PIC_STRUCT_TOP_PAIRED_PREVIOUS_BOTTOM``
- 9
- Top field paired with previous bottom field in output order
* - ``V4L2_HEVC_SEI_PIC_STRUCT_BOTTOM_PAIRED_PREVIOUS_TOP``
- 10
- Bottom field paired with previous top field in output order
* - ``V4L2_HEVC_SEI_PIC_STRUCT_TOP_PAIRED_NEXT_BOTTOM``
- 11
- Top field paired with next bottom field in output order
* - ``V4L2_HEVC_SEI_PIC_STRUCT_BOTTOM_PAIRED_NEXT_TOP``
- 12
- Bottom field paired with next top field in output order
.. c:type:: v4l2_hevc_pred_weight_table
.. raw:: latex
\footnotesize
.. tabularcolumns:: |p{0.8cm}|p{10.6cm}|p{5.9cm}|
.. flat-table:: struct v4l2_hevc_pred_weight_table
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __s8
- ``delta_luma_weight_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
- The difference of the weighting factor applied to the luma
prediction value for list 0.
* - __s8
- ``luma_offset_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
- The additive offset applied to the luma prediction value for list 0.
* - __s8
- ``delta_chroma_weight_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]``
- The difference of the weighting factor applied to the chroma
prediction value for list 0.
* - __s8
- ``chroma_offset_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]``
- The difference of the additive offset applied to the chroma
prediction values for list 0.
* - __s8
- ``delta_luma_weight_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
- The difference of the weighting factor applied to the luma
prediction value for list 1.
* - __s8
- ``luma_offset_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
- The additive offset applied to the luma prediction value for list 1.
* - __s8
- ``delta_chroma_weight_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]``
- The difference of the weighting factor applied to the chroma
prediction value for list 1.
* - __s8
- ``chroma_offset_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]``
- The difference of the additive offset applied to the chroma
prediction values for list 1.
* - __u8
- ``luma_log2_weight_denom``
- The base 2 logarithm of the denominator for all luma weighting
factors.
* - __s8
- ``delta_chroma_log2_weight_denom``
- The difference of the base 2 logarithm of the denominator for
all chroma weighting factors.
* - __u8
- ``padding[6]``
- Applications and drivers must set this to zero.
.. raw:: latex
\normalsize
``V4L2_CID_STATELESS_HEVC_DECODE_MODE (enum)``
Specifies the decoding mode to use. Currently exposes slice-based and
frame-based decoding but new modes might be added later on.
This control is used as a modifier for V4L2_PIX_FMT_HEVC_SLICE
pixel format. Applications that support V4L2_PIX_FMT_HEVC_SLICE
are required to set this control in order to specify the decoding mode
that is expected for the buffer.
Drivers may expose a single or multiple decoding modes, depending
on what they can support.
.. c:type:: v4l2_stateless_hevc_decode_mode
.. raw:: latex
\small
.. tabularcolumns:: |p{9.4cm}|p{0.6cm}|p{7.3cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_STATELESS_HEVC_DECODE_MODE_SLICE_BASED``
- 0
- Decoding is done at the slice granularity.
The OUTPUT buffer must contain a single slice.
* - ``V4L2_STATELESS_HEVC_DECODE_MODE_FRAME_BASED``
- 1
- Decoding is done at the frame granularity.
The OUTPUT buffer must contain all slices needed to decode the
frame.
.. raw:: latex
\normalsize
``V4L2_CID_STATELESS_HEVC_START_CODE (enum)``
Specifies the HEVC slice start code expected for each slice.
This control is used as a modifier for V4L2_PIX_FMT_HEVC_SLICE
pixel format. Applications that support V4L2_PIX_FMT_HEVC_SLICE
are required to set this control in order to specify the start code
that is expected for the buffer.
Drivers may expose a single or multiple start codes, depending
on what they can support.
.. c:type:: v4l2_stateless_hevc_start_code
.. tabularcolumns:: |p{9.2cm}|p{0.6cm}|p{7.5cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_STATELESS_HEVC_START_CODE_NONE``
- 0
- Selecting this value specifies that HEVC slices are passed
to the driver without any start code. The bitstream data should be
according to :ref:`hevc` 7.3.1.1 General NAL unit syntax, hence
contains emulation prevention bytes when required.
* - ``V4L2_STATELESS_HEVC_START_CODE_ANNEX_B``
- 1
- Selecting this value specifies that HEVC slices are expected
to be prefixed by Annex B start codes. According to :ref:`hevc`
valid start codes can be 3-bytes 0x000001 or 4-bytes 0x00000001.
.. raw:: latex
\normalsize
``V4L2_CID_MPEG_VIDEO_BASELAYER_PRIORITY_ID (integer)``
Specifies a priority identifier for the NAL unit, which will be applied to
the base layer. By default this value is set to 0 for the base layer,
and the next layer will have the priority ID assigned as 1, 2, 3 and so on.
The video encoder can't decide the priority id to be applied to a layer,
so this has to come from client.
This is applicable to H264 and valid Range is from 0 to 63.
Source Rec. ITU-T H.264 (06/2019); G.7.4.1.1, G.8.8.1.
``V4L2_CID_MPEG_VIDEO_LTR_COUNT (integer)``
Specifies the maximum number of Long Term Reference (LTR) frames at any
given time that the encoder can keep.
This is applicable to the H264 and HEVC encoders.
``V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX (integer)``
After setting this control the frame that will be queued next
will be marked as a Long Term Reference (LTR) frame
and given this LTR index which ranges from 0 to LTR_COUNT-1.
This is applicable to the H264 and HEVC encoders.
Source Rec. ITU-T H.264 (06/2019); Table 7.9
``V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES (bitmask)``
Specifies the Long Term Reference (LTR) frame(s) to be used for
encoding the next frame queued after setting this control.
This provides a bitmask which consists of bits [0, LTR_COUNT-1].
This is applicable to the H264 and HEVC encoders.
``V4L2_CID_STATELESS_HEVC_DECODE_PARAMS (struct)``
Specifies various decode parameters, especially the references picture order
count (POC) for all the lists (short, long, before, current, after) and the
number of entries for each of them.
These parameters are defined according to :ref:`hevc`.
They are described in section 8.3 "Slice decoding process" of the
specification.
.. c:type:: v4l2_ctrl_hevc_decode_params
.. cssclass:: longtable
.. flat-table:: struct v4l2_ctrl_hevc_decode_params
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __s32
- ``pic_order_cnt_val``
- PicOrderCntVal as described in section 8.3.1 "Decoding process
for picture order count" of the specification.
* - __u16
- ``short_term_ref_pic_set_size``
- Specifies the size, in bits, of the short-term reference picture set, of the first slice
described as st_ref_pic_set() in the specification, included in the slice header
or SPS (section 7.3.6.1).
* - __u16
- ``long_term_ref_pic_set_size``
- Specifies the size, in bits, of the long-term reference picture set, of the first slice
included in the slice header or SPS. It is the number of bits in the conditional block
if(long_term_ref_pics_present_flag) in section 7.3.6.1 of the specification.
* - __u8
- ``num_active_dpb_entries``
- The number of entries in ``dpb``.
* - __u8
- ``num_poc_st_curr_before``
- The number of reference pictures in the short-term set that come before
the current frame.
* - __u8
- ``num_poc_st_curr_after``
- The number of reference pictures in the short-term set that come after
the current frame.
* - __u8
- ``num_poc_lt_curr``
- The number of reference pictures in the long-term set.
* - __u8
- ``poc_st_curr_before[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
- PocStCurrBefore as described in section 8.3.2 "Decoding process for reference
picture set": provides the index of the short term before references in DPB array.
* - __u8
- ``poc_st_curr_after[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
- PocStCurrAfter as described in section 8.3.2 "Decoding process for reference
picture set": provides the index of the short term after references in DPB array.
* - __u8
- ``poc_lt_curr[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
- PocLtCurr as described in section 8.3.2 "Decoding process for reference
picture set": provides the index of the long term references in DPB array.
* - __u8
- ``num_delta_pocs_of_ref_rps_idx``
- When the short_term_ref_pic_set_sps_flag in the slice header is equal to 0,
it is the same as the derived value NumDeltaPocs[RefRpsIdx]. It can be used to parse
the RPS data in slice headers instead of skipping it with @short_term_ref_pic_set_size.
When the value of short_term_ref_pic_set_sps_flag in the slice header is
equal to 1, num_delta_pocs_of_ref_rps_idx shall be set to 0.
* - struct :c:type:`v4l2_hevc_dpb_entry`
- ``dpb[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
- The decoded picture buffer, for meta-data about reference frames.
* - __u64
- ``flags``
- See :ref:`Decode Parameters Flags <hevc_decode_params_flags>`
.. _hevc_decode_params_flags:
``Decode Parameters Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_HEVC_DECODE_PARAM_FLAG_IRAP_PIC``
- 0x00000001
-
* - ``V4L2_HEVC_DECODE_PARAM_FLAG_IDR_PIC``
- 0x00000002
-
* - ``V4L2_HEVC_DECODE_PARAM_FLAG_NO_OUTPUT_OF_PRIOR``
- 0x00000004
-
.. _v4l2-codec-stateless-av1:
``V4L2_CID_STATELESS_AV1_SEQUENCE (struct)``
Represents an AV1 Sequence OBU (Open Bitstream Unit). See section 5.5
"Sequence header OBU syntax" in :ref:`av1` for more details.
.. c:type:: v4l2_ctrl_av1_sequence
.. cssclass:: longtable
.. tabularcolumns:: |p{5.8cm}|p{4.8cm}|p{6.6cm}|
.. flat-table:: struct v4l2_ctrl_av1_sequence
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u32
- ``flags``
- See :ref:`AV1 Sequence Flags <av1_sequence_flags>`.
* - __u8
- ``seq_profile``
- Specifies the features that can be used in the coded video sequence.
* - __u8
- ``order_hint_bits``
- Specifies the number of bits used for the order_hint field at each frame.
* - __u8
- ``bit_depth``
- the bit depth to use for the sequence as described in section 5.5.2
"Color config syntax" in :ref:`av1` for more details.
* - __u8
- ``reserved``
- Applications and drivers must set this to zero.
* - __u16
- ``max_frame_width_minus_1``
- specifies the maximum frame width minus 1 for the frames represented by
this sequence header.
.. _av1_sequence_flags:
``AV1 Sequence Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_AV1_SEQUENCE_FLAG_STILL_PICTURE``
- 0x00000001
- If set, specifies that the coded video sequence contains only one coded
frame. If not set, specifies that the coded video sequence contains one
or more coded frames.
* - ``V4L2_AV1_SEQUENCE_FLAG_USE_128X128_SUPERBLOCK``
- 0x00000002
- If set, indicates that superblocks contain 128x128 luma samples.
When equal to 0, it indicates that superblocks contain 64x64 luma
samples. The number of contained chroma samples depends on
subsampling_x and subsampling_y.
* - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_FILTER_INTRA``
- 0x00000004
- If set, specifies that the use_filter_intra syntax element may be
present. If not set, specifies that the use_filter_intra syntax element
will not be present.
* - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_INTRA_EDGE_FILTER``
- 0x00000008
- Specifies whether the intra edge filtering process should be enabled.
* - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_INTERINTRA_COMPOUND``
- 0x00000010
- If set, specifies that the mode info for inter blocks may contain the
syntax element interintra. If not set, specifies that the syntax element
interintra will not be present.
* - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_MASKED_COMPOUND``
- 0x00000020
- If set, specifies that the mode info for inter blocks may contain the
syntax element compound_type. If not set, specifies that the syntax
element compound_type will not be present.
* - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_WARPED_MOTION``
- 0x00000040
- If set, indicates that the allow_warped_motion syntax element may be
present. If not set, indicates that the allow_warped_motion syntax
element will not be present.
* - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_DUAL_FILTER``
- 0x00000080
- If set, indicates that the inter prediction filter type may be specified
independently in the horizontal and vertical directions. If the flag is
equal to 0, only one filter type may be specified, which is then used in
both directions.
* - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_ORDER_HINT``
- 0x00000100
- If set, indicates that tools based on the values of order hints may be
used. If not set, indicates that tools based on order hints are
disabled.
* - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_JNT_COMP``
- 0x00000200
- If set, indicates that the distance weights process may be used for
inter prediction.
* - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_REF_FRAME_MVS``
- 0x00000400
- If set, indicates that the use_ref_frame_mvs syntax element may be
present. If not set, indicates that the use_ref_frame_mvs syntax element
will not be present.
* - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_SUPERRES``
- 0x00000800
- If set, specifies that the use_superres syntax element will be present
in the uncompressed header. If not set, specifies that the use_superres
syntax element will not be present (instead use_superres will be set to
0 in the uncompressed header without being read).
* - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_CDEF``
- 0x00001000
- If set, specifies that cdef filtering may be enabled. If not set,
specifies that cdef filtering is disabled.
* - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_RESTORATION``
- 0x00002000
- If set, specifies that loop restoration filtering may be enabled. If not
set, specifies that loop restoration filtering is disabled.
* - ``V4L2_AV1_SEQUENCE_FLAG_MONO_CHROME``
- 0x00004000
- If set, indicates that the video does not contain U and V color planes.
If not set, indicates that the video contains Y, U, and V color planes.
* - ``V4L2_AV1_SEQUENCE_FLAG_COLOR_RANGE``
- 0x00008000
- If set, signals full swing representation, i.e. "Full Range
Quantization". If not set, signals studio swing representation, i.e.
"Limited Range Quantization".
* - ``V4L2_AV1_SEQUENCE_FLAG_SUBSAMPLING_X``
- 0x00010000
- Specify the chroma subsampling format.
* - ``V4L2_AV1_SEQUENCE_FLAG_SUBSAMPLING_Y``
- 0x00020000
- Specify the chroma subsampling format.
* - ``V4L2_AV1_SEQUENCE_FLAG_FILM_GRAIN_PARAMS_PRESENT``
- 0x00040000
- Specifies whether film grain parameters are present in the coded video
sequence.
* - ``V4L2_AV1_SEQUENCE_FLAG_SEPARATE_UV_DELTA_Q``
- 0x00080000
- If set, indicates that the U and V planes may have separate delta
quantizer values. If not set, indicates that the U and V planes will share
the same delta quantizer value.
``V4L2_CID_STATELESS_AV1_TILE_GROUP_ENTRY (struct)``
Represents a single AV1 tile inside an AV1 Tile Group. Note that MiRowStart,
MiRowEnd, MiColStart and MiColEnd can be retrieved from struct
v4l2_av1_tile_info in struct v4l2_ctrl_av1_frame using tile_row and
tile_col. See section 6.10.1 "General tile group OBU semantics" in
:ref:`av1` for more details.
.. c:type:: v4l2_ctrl_av1_tile_group_entry
.. cssclass:: longtable
.. tabularcolumns:: |p{5.8cm}|p{4.8cm}|p{6.6cm}|
.. flat-table:: struct v4l2_ctrl_av1_tile_group_entry
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u32
- ``tile_offset``
- Offset from the OBU data, i.e. where the coded tile data actually starts.
* - __u32
- ``tile_size``
- Specifies the size in bytes of the coded tile. Equivalent to "TileSize"
in :ref:`av1`.
* - __u32
- ``tile_row``
- Specifies the row of the current tile. Equivalent to "TileRow" in
:ref:`av1`.
* - __u32
- ``tile_col``
- Specifies the column of the current tile. Equivalent to "TileColumn" in
:ref:`av1`.
.. c:type:: v4l2_av1_warp_model
AV1 Warp Model as described in section 3 "Symbols and abbreviated terms" of
:ref:`av1`.
.. raw:: latex
\scriptsize
.. tabularcolumns:: |p{7.4cm}|p{0.3cm}|p{9.6cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_AV1_WARP_MODEL_IDENTITY``
- 0
- Warp model is just an identity transform.
* - ``V4L2_AV1_WARP_MODEL_TRANSLATION``
- 1
- Warp model is a pure translation.
* - ``V4L2_AV1_WARP_MODEL_ROTZOOM``
- 2
- Warp model is a rotation + symmetric zoom + translation.
* - ``V4L2_AV1_WARP_MODEL_AFFINE``
- 3
- Warp model is a general affine transform.
.. c:type:: v4l2_av1_reference_frame
AV1 Reference Frames as described in section 6.10.24 "Ref frames semantics"
of :ref:`av1`.
.. raw:: latex
\scriptsize
.. tabularcolumns:: |p{7.4cm}|p{0.3cm}|p{9.6cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_AV1_REF_INTRA_FRAME``
- 0
- Intra Frame Reference.
* - ``V4L2_AV1_REF_LAST_FRAME``
- 1
- Last Frame Reference.
* - ``V4L2_AV1_REF_LAST2_FRAME``
- 2
- Last2 Frame Reference.
* - ``V4L2_AV1_REF_LAST3_FRAME``
- 3
- Last3 Frame Reference.
* - ``V4L2_AV1_REF_GOLDEN_FRAME``
- 4
- Golden Frame Reference.
* - ``V4L2_AV1_REF_BWDREF_FRAME``
- 5
- BWD Frame Reference.
* - ``V4L2_AV1_REF_ALTREF2_FRAME``
- 6
- ALTREF2 Frame Reference.
* - ``V4L2_AV1_REF_ALTREF_FRAME``
- 7
- ALTREF Frame Reference.
.. c:type:: v4l2_av1_global_motion
AV1 Global Motion parameters as described in section 6.8.17
"Global motion params semantics" of :ref:`av1`.
.. cssclass:: longtable
.. tabularcolumns:: |p{1.5cm}|p{5.8cm}|p{10.0cm}|
.. flat-table:: struct v4l2_av1_global_motion
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``flags[V4L2_AV1_TOTAL_REFS_PER_FRAME]``
- A bitfield containing the flags per reference frame. See
:ref:`AV1 Global Motion Flags <av1_global_motion_flags>` for more
details.
* - enum :c:type:`v4l2_av1_warp_model`
- ``type[V4L2_AV1_TOTAL_REFS_PER_FRAME]``
- The type of global motion transform used.
* - __s32
- ``params[V4L2_AV1_TOTAL_REFS_PER_FRAME][6]``
- This field has the same meaning as "gm_params" in :ref:`av1`.
* - __u8
- ``invalid``
- Bitfield indicating whether the global motion params are invalid for a
given reference frame. See section 7.11.3.6 Setup shear process and the
variable "warpValid". Use V4L2_AV1_GLOBAL_MOTION_IS_INVALID(ref) to
create a suitable mask.
* - __u8
- ``reserved[3]``
- Applications and drivers must set this to zero.
.. _av1_global_motion_flags:
``AV1 Global Motion Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_AV1_GLOBAL_MOTION_FLAG_IS_GLOBAL``
- 0x00000001
- Specifies whether global motion parameters are present for a particular
reference frame.
* - ``V4L2_AV1_GLOBAL_MOTION_FLAG_IS_ROT_ZOOM``
- 0x00000002
- Specifies whether a particular reference frame uses rotation and zoom
global motion.
* - ``V4L2_AV1_GLOBAL_MOTION_FLAG_IS_TRANSLATION``
- 0x00000004
- Specifies whether a particular reference frame uses translation global
motion
.. c:type:: v4l2_av1_frame_restoration_type
AV1 Frame Restoration Type.
.. raw:: latex
\scriptsize
.. tabularcolumns:: |p{7.4cm}|p{0.3cm}|p{9.6cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_AV1_FRAME_RESTORE_NONE``
- 0
- No filtering is applied.
* - ``V4L2_AV1_FRAME_RESTORE_WIENER``
- 1
- Wiener filter process is invoked.
* - ``V4L2_AV1_FRAME_RESTORE_SGRPROJ``
- 2
- Self guided filter process is invoked.
* - ``V4L2_AV1_FRAME_RESTORE_SWITCHABLE``
- 3
- Restoration filter is swichtable.
.. c:type:: v4l2_av1_loop_restoration
AV1 Loop Restoration as described in section 6.10.15 "Loop restoration params
semantics" of :ref:`av1`.
.. cssclass:: longtable
.. tabularcolumns:: |p{1.5cm}|p{5.8cm}|p{10.0cm}|
.. flat-table:: struct v4l2_av1_loop_restoration
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``flags``
- See :ref:`AV1 Loop Restoration Flags <av1_loop_restoration_flags>`.
* - __u8
- ``lr_unit_shift``
- Specifies if the luma restoration size should be halved.
* - __u8
- ``lr_uv_shift``
- Specifies if the chroma size should be half the luma size.
* - __u8
- ``reserved``
- Applications and drivers must set this to zero.
* - :c:type:`v4l2_av1_frame_restoration_type`
- ``frame_restoration_type[V4L2_AV1_NUM_PLANES_MAX]``
- Specifies the type of restoration used for each plane.
* - __u8
- ``loop_restoration_size[V4L2_AV1_MAX_NUM_PLANES]``
- Specifies the size of loop restoration units in units of samples in the
current plane.
.. _av1_loop_restoration_flags:
``AV1 Loop Restoration Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_AV1_LOOP_RESTORATION_FLAG_USES_LR``
- 0x00000001
- Retains the same meaning as UsesLr in :ref:`av1`.
* - ``V4L2_AV1_LOOP_RESTORATION_FLAG_USES_CHROMA_LR``
- 0x00000002
- Retains the same meaning as UsesChromaLr in :ref:`av1`.
.. c:type:: v4l2_av1_cdef
AV1 CDEF params semantics as described in section 6.10.14 "CDEF params
semantics" of :ref:`av1`.
.. cssclass:: longtable
.. tabularcolumns:: |p{1.5cm}|p{5.8cm}|p{10.0cm}|
.. flat-table:: struct v4l2_av1_cdef
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``damping_minus_3``
- Controls the amount of damping in the deringing filter.
* - __u8
- ``bits``
- Specifies the number of bits needed to specify which CDEF filter to
apply.
* - __u8
- ``y_pri_strength[V4L2_AV1_CDEF_MAX]``
- Specifies the strength of the primary filter.
* - __u8
- ``y_sec_strength[V4L2_AV1_CDEF_MAX]``
- Specifies the strength of the secondary filter.
* - __u8
- ``uv_pri_strength[V4L2_AV1_CDEF_MAX]``
- Specifies the strength of the primary filter.
* - __u8
- ``uv_secondary_strength[V4L2_AV1_CDEF_MAX]``
- Specifies the strength of the secondary filter.
.. c:type:: v4l2_av1_segment_feature
AV1 segment features as described in section 3 "Symbols and abbreviated terms"
of :ref:`av1`.
.. raw:: latex
\scriptsize
.. tabularcolumns:: |p{7.4cm}|p{0.3cm}|p{9.6cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_AV1_SEG_LVL_ALT_Q``
- 0
- Index for quantizer segment feature.
* - ``V4L2_AV1_SEG_LVL_ALT_LF_Y_V``
- 1
- Index for vertical luma loop filter segment feature.
* - ``V4L2_AV1_SEG_LVL_REF_FRAME``
- 5
- Index for reference frame segment feature.
* - ``V4L2_AV1_SEG_LVL_REF_SKIP``
- 6
- Index for skip segment feature.
* - ``V4L2_AV1_SEG_LVL_REF_GLOBALMV``
- 7
- Index for global mv feature.
* - ``V4L2_AV1_SEG_LVL_MAX``
- 8
- Number of segment features.
.. c:type:: v4l2_av1_segmentation
AV1 Segmentation params as defined in section 6.8.13 "Segmentation params
semantics" of :ref:`av1`.
.. cssclass:: longtable
.. tabularcolumns:: |p{1.5cm}|p{5.8cm}|p{10.0cm}|
.. flat-table:: struct v4l2_av1_segmentation
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``flags``
- See :ref:`AV1 Segmentation Flags <av1_segmentation_flags>`
* - __u8
- ``last_active_seg_id``
- Indicates the highest numbered segment id that has some
enabled feature. This is used when decoding the segment id to only decode
choices corresponding to used segments.
* - __u8
- ``feature_enabled[V4L2_AV1_MAX_SEGMENTS]``
- Bitmask defining which features are enabled in each segment. Use
V4L2_AV1_SEGMENT_FEATURE_ENABLED to build a suitable mask.
* - __u16
- `feature_data[V4L2_AV1_MAX_SEGMENTS][V4L2_AV1_SEG_LVL_MAX]``
- Data attached to each feature. Data entry is only valid if the feature
is enabled.
.. _av1_segmentation_flags:
``AV1 Segmentation Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_AV1_SEGMENTATION_FLAG_ENABLED``
- 0x00000001
- If set, indicates that this frame makes use of the segmentation tool. If
not set, indicates that the frame does not use segmentation.
* - ``V4L2_AV1_SEGMENTATION_FLAG_UPDATE_MAP``
- 0x00000002
- If set, indicates that the segmentation map are updated during the
decoding of this frame. If not set, indicates that the segmentation map
from the previous frame is used.
* - ``V4L2_AV1_SEGMENTATION_FLAG_TEMPORAL_UPDATE``
- 0x00000004
- If set, indicates that the updates to the segmentation map are coded
relative to the existing segmentation map. If not set, indicates that
the new segmentation map is coded without reference to the existing
segmentation map.
* - ``V4L2_AV1_SEGMENTATION_FLAG_UPDATE_DATA``
- 0x00000008
- If set, indicates that the updates to the segmentation map are coded
relative to the existing segmentation map. If not set, indicates that
the new segmentation map is coded without reference to the existing
segmentation map.
* - ``V4L2_AV1_SEGMENTATION_FLAG_SEG_ID_PRE_SKIP``
- 0x00000010
- If set, indicates that the segment id will be read before the skip
syntax element. If not set, indicates that the skip syntax element will
be read first.
.. c:type:: v4l2_av1_loop_filter
AV1 Loop filter params as defined in section 6.8.10 "Loop filter semantics" of
:ref:`av1`.
.. cssclass:: longtable
.. tabularcolumns:: |p{1.5cm}|p{5.8cm}|p{10.0cm}|
.. flat-table:: struct v4l2_av1_global_motion
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``flags``
- See
:ref:`AV1 Loop Filter flags <av1_loop_filter_flags>` for more details.
* - __u8
- ``level[4]``
- An array containing loop filter strength values. Different loop
filter strength values from the array are used depending on the image
plane being filtered, and the edge direction (vertical or horizontal)
being filtered.
* - __u8
- ``sharpness``
- indicates the sharpness level. The loop_filter_level and
loop_filter_sharpness together determine when a block edge is filtered,
and by how much the filtering can change the sample values. The loop
filter process is described in section 7.14 of :ref:`av1`.
* - __u8
- ``ref_deltas[V4L2_AV1_TOTAL_REFS_PER_FRAME]``
- contains the adjustment needed for the filter level based on the
chosen reference frame. If this syntax element is not present, it
maintains its previous value.
* - __u8
- ``mode_deltas[2]``
- contains the adjustment needed for the filter level based on
the chosen mode. If this syntax element is not present, it maintains its
previous value.
* - __u8
- ``delta_lf_res``
- specifies the left shift which should be applied to decoded loop filter
delta values.
.. _av1_loop_filter_flags:
``AV1 Loop Filter Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_AV1_LOOP_FILTER_FLAG_DELTA_ENABLED``
- 0x00000001
- If set, means that the filter level depends on the mode and reference
frame used to predict a block. If not set, means that the filter level
does not depend on the mode and reference frame.
* - ``V4L2_AV1_LOOP_FILTER_FLAG_DELTA_UPDATE``
- 0x00000002
- If set, means that additional syntax elements are present that specify
which mode and reference frame deltas are to be updated. If not set,
means that these syntax elements are not present.
* - ``V4L2_AV1_LOOP_FILTER_FLAG_DELTA_LF_PRESENT``
- 0x00000004
- Specifies whether loop filter delta values are present
* - ``V4L2_AV1_LOOP_FILTER_FLAG_DELTA_LF_MULTI``
- 0x00000008
- A value equal to 1 specifies that separate loop filter
deltas are sent for horizontal luma edges, vertical luma edges,
the U edges, and the V edges. A value of delta_lf_multi equal to 0
specifies that the same loop filter delta is used for all edges.
.. c:type:: v4l2_av1_quantization
AV1 Quantization params as defined in section 6.8.11 "Quantization params
semantics" of :ref:`av1`.
.. cssclass:: longtable
.. tabularcolumns:: |p{1.5cm}|p{5.8cm}|p{10.0cm}|
.. flat-table:: struct v4l2_av1_quantization
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``flags``
- See
:ref:`AV1 Loop Filter flags <av1_quantization_flags>` for more details.
* - __u8
- ``base_q_idx``
- Indicates the base frame qindex. This is used for Y AC coefficients and
as the base value for the other quantizers.
* - __u8
- ``delta_q_y_dc``
- Indicates the Y DC quantizer relative to base_q_idx.
* - __u8
- ``delta_q_u_dc``
- Indicates the U DC quantizer relative to base_q_idx.
* - __u8
- ``delta_q_u_ac``
- Indicates the U AC quantizer relative to base_q_idx.
* - __u8
- ``delta_q_v_dc``
- Indicates the V DC quantizer relative to base_q_idx.
* - __u8
- ``delta_q_v_ac``
- Indicates the V AC quantizer relative to base_q_idx.
* - __u8
- ``qm_y``
- Specifies the level in the quantizer matrix that should be used for
luma plane decoding.
* - __u8
- ``qm_u``
- Specifies the level in the quantizer matrix that should be used for
chroma U plane decoding.
* - __u8
- ``qm_v``
- Specifies the level in the quantizer matrix that should be used for
chroma V plane decoding.
* - __u8
- ``delta_q_res``
- Specifies the left shift which should be applied to decoded quantizer
index delta values.
.. _av1_quantization_flags:
``AV1 Quantization Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_AV1_QUANTIZATION_FLAG_DIFF_UV_DELTA``
- 0x00000001
- If set, indicates that the U and V delta quantizer values are coded
separately. If not set, indicates that the U and V delta quantizer
values share a common value.
* - ``V4L2_AV1_QUANTIZATION_FLAG_USING_QMATRIX``
- 0x00000002
- If set, specifies that the quantizer matrix will be used to compute
quantizers.
* - ``V4L2_AV1_QUANTIZATION_FLAG_DELTA_Q_PRESENT``
- 0x00000004
- Specifies whether quantizer index delta values are present.
.. c:type:: v4l2_av1_tile_info
AV1 Tile info as defined in section 6.8.14 "Tile info semantics" of ref:`av1`.
.. cssclass:: longtable
.. tabularcolumns:: |p{1.5cm}|p{5.8cm}|p{10.0cm}|
.. flat-table:: struct v4l2_av1_tile_info
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``flags``
- See
:ref:`AV1 Tile Info flags <av1_tile_info_flags>` for more details.
* - __u8
- ``context_update_tile_id``
- Specifies which tile to use for the CDF update.
* - __u8
- ``tile_cols``
- Specifies the number of tiles across the frame.
* - __u8
- ``tile_rows``
- Specifies the number of tiles down the frame.
* - __u32
- ``mi_col_starts[V4L2_AV1_MAX_TILE_COLS + 1]``
- An array specifying the start column (in units of 4x4 luma
samples) for each tile across the image.
* - __u32
- ``mi_row_starts[V4L2_AV1_MAX_TILE_ROWS + 1]``
- An array specifying the start row (in units of 4x4 luma
samples) for each tile across the image.
* - __u32
- ``width_in_sbs_minus_1[V4L2_AV1_MAX_TILE_COLS]``
- Specifies the width of a tile minus 1 in units of superblocks.
* - __u32
- ``height_in_sbs_minus_1[V4L2_AV1_MAX_TILE_ROWS]``
- Specifies the height of a tile minus 1 in units of superblocks.
* - __u8
- ``tile_size_bytes``
- Specifies the number of bytes needed to code each tile size.
* - __u8
- ``reserved[3]``
- Applications and drivers must set this to zero.
.. _av1_tile_info_flags:
``AV1 Tile Info Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_AV1_TILE_INFO_FLAG_UNIFORM_TILE_SPACING``
- 0x00000001
- If set, means that the tiles are uniformly spaced across the frame. (In
other words, all tiles are the same size except for the ones at the
right and bottom edge which can be smaller). If not set means that the
tile sizes are coded.
.. c:type:: v4l2_av1_frame_type
AV1 Frame Type
.. raw:: latex
\scriptsize
.. tabularcolumns:: |p{7.4cm}|p{0.3cm}|p{9.6cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_AV1_KEY_FRAME``
- 0
- Key frame.
* - ``V4L2_AV1_INTER_FRAME``
- 1
- Inter frame.
* - ``V4L2_AV1_INTRA_ONLY_FRAME``
- 2
- Intra-only frame.
* - ``V4L2_AV1_SWITCH_FRAME``
- 3
- Switch frame.
.. c:type:: v4l2_av1_interpolation_filter
AV1 Interpolation Filter
.. raw:: latex
\scriptsize
.. tabularcolumns:: |p{7.4cm}|p{0.3cm}|p{9.6cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_AV1_INTERPOLATION_FILTER_EIGHTTAP``
- 0
- Eight tap filter.
* - ``V4L2_AV1_INTERPOLATION_FILTER_EIGHTTAP_SMOOTH``
- 1
- Eight tap smooth filter.
* - ``V4L2_AV1_INTERPOLATION_FILTER_EIGHTTAP_SHARP``
- 2
- Eight tap sharp filter.
* - ``V4L2_AV1_INTERPOLATION_FILTER_BILINEAR``
- 3
- Bilinear filter.
* - ``V4L2_AV1_INTERPOLATION_FILTER_SWITCHABLE``
- 4
- Filter selection is signaled at the block level.
.. c:type:: v4l2_av1_tx_mode
AV1 Tx mode as described in section 6.8.21 "TX mode semantics" of :ref:`av1`.
.. raw:: latex
\scriptsize
.. tabularcolumns:: |p{7.4cm}|p{0.3cm}|p{9.6cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_AV1_TX_MODE_ONLY_4X4``
- 0
- The inverse transform will use only 4x4 transforms.
* - ``V4L2_AV1_TX_MODE_LARGEST``
- 1
- The inverse transform will use the largest transform size that fits
inside the block.
* - ``V4L2_AV1_TX_MODE_SELECT``
- 2
- The choice of transform size is specified explicitly for each block.
``V4L2_CID_STATELESS_AV1_FRAME (struct)``
Represents a Frame Header OBU. See 6.8 "Frame Header OBU semantics" of
:ref:`av1` for more details.
.. c:type:: v4l2_ctrl_av1_frame
.. cssclass:: longtable
.. tabularcolumns:: |p{5.8cm}|p{4.8cm}|p{6.6cm}|
.. flat-table:: struct v4l2_ctrl_av1_frame
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - struct :c:type:`v4l2_av1_tile_info`
- ``tile_info``
- Tile info
* - struct :c:type:`v4l2_av1_quantization`
- ``quantization``
- Quantization parameters.
* - struct :c:type:`v4l2_av1_segmentation`
- ``segmentation``
- Segmentation parameters.
* - __u8
- ``superres_denom``
- The denominator for the upscaling ratio.
* - struct :c:type:`v4l2_av1_loop_filter`
- ``loop_filter``
- Loop filter params
* - struct :c:type:`v4l2_av1_cdef`
- ``cdef``
- CDEF params
* - __u8
- ``skip_mode_frame[2]``
- Specifies the frames to use for compound prediction when skip_mode is
equal to 1.
* - __u8
- ``primary_ref_frame``
- Specifies which reference frame contains the CDF values and other state
that should be loaded at the start of the frame.
* - struct :c:type:`v4l2_av1_loop_restoration`
- ``loop_restoration``
- Loop restoration parameters.
* - struct :c:type:`v4l2_av1_loop_global_motion`
- ``global_motion``
- Global motion parameters.
* - __u32
- ``flags``
- See
:ref:`AV1 Frame flags <av1_frame_flags>` for more details.
* - enum :c:type:`v4l2_av1_frame_type`
- ``frame_type``
- Specifies the AV1 frame type
* - __u32
- ``order_hint``
- Specifies OrderHintBits least significant bits of the expected output
order for this frame.
* - __u32
- ``upscaled_width``
- The upscaled width.
* - enum :c:type:`v4l2_av1_interpolation_filter`
- ``interpolation_filter``
- Specifies the filter selection used for performing inter prediction.
* - enum :c:type:`v4l2_av1_tx_mode`
- ``tx_mode``
- Specifies how the transform size is determined.
* - __u32
- ``frame_width_minus_1``
- Add 1 to get the frame's width.
* - __u32
- ``frame_height_minus_1``
- Add 1 to get the frame's height.
* - __u16
- ``render_width_minus_1``
- Add 1 to get the render width of the frame in luma samples.
* - __u16
- ``render_height_minus_1``
- Add 1 to get the render height of the frame in luma samples.
* - __u32
- ``current_frame_id``
- Specifies the frame id number for the current frame. Frame
id numbers are additional information that do not affect the decoding
process, but provide decoders with a way of detecting missing reference
frames so that appropriate action can be taken.
* - __u8
- ``buffer_removal_time[V4L2_AV1_MAX_OPERATING_POINTS]``
- Specifies the frame removal time in units of DecCT clock ticks counted
from the removal time of the last random access point for operating point
opNum.
* - __u8
- ``reserved[4]``
- Applications and drivers must set this to zero.
* - __u32
- ``order_hints[V4L2_AV1_TOTAL_REFS_PER_FRAME]``
- Specifies the expected output order hint for each reference frame.
This field corresponds to the OrderHints variable from the specification
(section 5.9.2 "Uncompressed header syntax"). As such, this is only
used for non-intra frames and ignored otherwise. order_hints[0] is
always ignored.
* - __u64
- ``reference_frame_ts[V4L2_AV1_TOTAL_REFS_PER_FRAME]``
- The V4L2 timestamp for each of the reference frames enumerated in
enum :c:type:`v4l2_av1_reference_frame` starting at
``V4L2_AV1_REF_LAST_FRAME``. This represents the state of reference
slot as described in the spec and updated by userland through the
"Reference frame update process" in section 7.20 The timestamp refers
to the ``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the
:c:func:`v4l2_timeval_to_ns()` function to convert the struct
:c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64.
* - __s8
- ``ref_frame_idx[V4L2_AV1_REFS_PER_FRAME]``
- An index into ``reference_frame_ts`` representing the ordered list of
references used by inter-frame. Matches the bitstream syntax
element of the same name.
* - __u8
- ``refresh_frame_flags``
- Contains a bitmask that specifies which reference frame slots will be
updated with the current frame after it is decoded.
.. _av1_frame_flags:
``AV1 Frame Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_AV1_FRAME_FLAG_SHOW_FRAME``
- 0x00000001
- If set, specifies that this frame should be immediately output once
decoded. If not set, specifies that this frame should not be immediately
output; it may be output later if a later uncompressed header uses
show_existing_frame equal to 1.
* - ``V4L2_AV1_FRAME_FLAG_SHOWABLE_FRAME``
- 0x00000002
- If set, specifies that the frame may be output using the
show_existing_frame mechanism. If not set, specifies that this frame
will not be output using the show_existing_frame mechanism.
* - ``V4L2_AV1_FRAME_FLAG_ERROR_RESILIENT_MODE``
- 0x00000004
- Specifies whether error resilient mode is enabled.
* - ``V4L2_AV1_FRAME_FLAG_DISABLE_CDF_UPDATE``
- 0x00000008
- Specifies whether the CDF update in the symbol decoding process should
be disabled.
* - ``V4L2_AV1_FRAME_FLAG_ALLOW_SCREEN_CONTENT_TOOLS``
- 0x00000010
- If set, indicates that intra blocks may use palette encoding. If not
set, indicates that palette encoding is never used.
* - ``V4L2_AV1_FRAME_FLAG_FORCE_INTEGER_MV``
- 0x00000020
- If set, specifies that motion vectors will always be integers. If not
set, specifies that motion vectors can contain fractional bits.
* - ``V4L2_AV1_FRAME_FLAG_ALLOW_INTRABC``
- 0x00000040
- If set, indicates that intra block copy may be used in this frame. If
not set, indicates that intra block copy is not allowed in this frame.
* - ``V4L2_AV1_FRAME_FLAG_USE_SUPERRES``
- 0x00000080
- If set, indicates that upscaling is needed.
* - ``V4L2_AV1_FRAME_FLAG_ALLOW_HIGH_PRECISION_MV``
- 0x00000100
- If set, specifies that motion vectors are specified to eighth pel
precision. If not set, specifies that motion vectors are specified to
quarter pel precision;
* - ``V4L2_AV1_FRAME_FLAG_IS_MOTION_MODE_SWITCHABLE``
- 0x00000200
- If not set, specifies that only the SIMPLE motion mode will be used.
* - ``V4L2_AV1_FRAME_FLAG_USE_REF_FRAME_MVS``
- 0x00000400
- If set specifies that motion vector information from a previous frame
can be used when decoding the current frame. If not set, specifies that
this information will not be used.
* - ``V4L2_AV1_FRAME_FLAG_DISABLE_FRAME_END_UPDATE_CDF``
- 0x00000800
- If set indicates that the end of frame CDF update is disabled. If not
set, indicates that the end of frame CDF update is enabled
* - ``V4L2_AV1_FRAME_FLAG_ALLOW_WARPED_MOTION``
- 0x00001000
- If set, indicates that the syntax element motion_mode may be present, if
not set, indicates that the syntax element motion_mode will not be
present.
* - ``V4L2_AV1_FRAME_FLAG_REFERENCE_SELECT``
- 0x00002000
- If set, specifies that the mode info for inter blocks contains the
syntax element comp_mode that indicates whether to use single or
compound reference prediction. If not set, specifies that all inter
blocks will use single prediction.
* - ``V4L2_AV1_FRAME_FLAG_REDUCED_TX_SET``
- 0x00004000
- If set, specifies that the frame is restricted to a reduced subset of
the full set of transform types.
* - ``V4L2_AV1_FRAME_FLAG_SKIP_MODE_ALLOWED``
- 0x00008000
- This flag retains the same meaning as SkipModeAllowed in :ref:`av1`.
* - ``V4L2_AV1_FRAME_FLAG_SKIP_MODE_PRESENT``
- 0x00010000
- If set, specifies that the syntax element skip_mode will be present, if
not set, specifies that skip_mode will not be used for this frame.
* - ``V4L2_AV1_FRAME_FLAG_FRAME_SIZE_OVERRIDE``
- 0x00020000
- If set, specifies that the frame size will either be specified as the
size of one of the reference frames, or computed from the
frame_width_minus_1 and frame_height_minus_1 syntax elements. If not
set, specifies that the frame size is equal to the size in the sequence
header.
* - ``V4L2_AV1_FRAME_FLAG_BUFFER_REMOVAL_TIME_PRESENT``
- 0x00040000
- If set, specifies that buffer_removal_time is present. If not set,
specifies that buffer_removal_time is not present.
* - ``V4L2_AV1_FRAME_FLAG_FRAME_REFS_SHORT_SIGNALING``
- 0x00080000
- If set, indicates that only two reference frames are explicitly
signaled. If not set, indicates that all reference frames are explicitly
signaled.
``V4L2_CID_STATELESS_AV1_FILM_GRAIN (struct)``
Represents the optional film grain parameters. See section
6.8.20 "Film grain params semantics" of :ref:`av1` for more details.
.. c:type:: v4l2_ctrl_av1_film_grain
.. cssclass:: longtable
.. tabularcolumns:: |p{1.5cm}|p{5.8cm}|p{10.0cm}|
.. flat-table:: struct v4l2_ctrl_av1_film_grain
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``flags``
- See :ref:`AV1 Film Grain Flags <av1_film_grain_flags>`.
* - __u8
- ``cr_mult``
- Represents a multiplier for the cr component used in derivation of the
input index to the cr component scaling function.
* - __u16
- ``grain_seed``
- Specifies the starting value for the pseudo-random numbers used during
film grain synthesis.
* - __u8
- ``film_grain_params_ref_idx``
- Indicates which reference frame contains the film grain parameters to be
used for this frame.
* - __u8
- ``num_y_points``
- Specifies the number of points for the piece-wise linear scaling
function of the luma component.
* - __u8
- ``point_y_value[V4L2_AV1_MAX_NUM_Y_POINTS]``
- Represents the x (luma value) coordinate for the i-th point
of the piecewise linear scaling function for luma component. The values
are signaled on the scale of 0..255. In case of 10 bit video, these
values correspond to luma values divided by 4. In case of 12 bit video,
these values correspond to luma values divided by 16.
* - __u8
- ``point_y_scaling[V4L2_AV1_MAX_NUM_Y_POINTS]``
- Represents the scaling (output) value for the i-th point
of the piecewise linear scaling function for luma component.
* - __u8
- ``num_cb_points``
- Specifies the number of points for the piece-wise linear scaling
function of the cb component.
* - __u8
- ``point_cb_value[V4L2_AV1_MAX_NUM_CB_POINTS]``
- Represents the x coordinate for the i-th point of the
piece-wise linear scaling function for cb component. The values are
signaled on the scale of 0..255.
* - __u8
- ``point_cb_scaling[V4L2_AV1_MAX_NUM_CB_POINTS]``
- Represents the scaling (output) value for the i-th point of the
piecewise linear scaling function for cb component.
* - __u8
- ``num_cr_points``
- Represents the number of points for the piece-wise
linear scaling function of the cr component.
* - __u8
- ``point_cr_value[V4L2_AV1_MAX_NUM_CR_POINTS]``
- Represents the x coordinate for the i-th point of the
piece-wise linear scaling function for cr component. The values are
signaled on the scale of 0..255.
* - __u8
- ``point_cr_scaling[V4L2_AV1_MAX_NUM_CR_POINTS]``
- Represents the scaling (output) value for the i-th point of the
piecewise linear scaling function for cr component.
* - __u8
- ``grain_scaling_minus_8``
- Represents the shift - 8 applied to the values of the chroma component.
The grain_scaling_minus_8 can take values of 0..3 and determines the
range and quantization step of the standard deviation of film grain.
* - __u8
- ``ar_coeff_lag``
- Specifies the number of auto-regressive coefficients for luma and
chroma.
* - __u8
- ``ar_coeffs_y_plus_128[V4L2_AV1_AR_COEFFS_SIZE]``
- Specifies auto-regressive coefficients used for the Y plane.
* - __u8
- ``ar_coeffs_cb_plus_128[V4L2_AV1_AR_COEFFS_SIZE]``
- Specifies auto-regressive coefficients used for the U plane.
* - __u8
- ``ar_coeffs_cr_plus_128[V4L2_AV1_AR_COEFFS_SIZE]``
- Specifies auto-regressive coefficients used for the V plane.
* - __u8
- ``ar_coeff_shift_minus_6``
- Specifies the range of the auto-regressive coefficients. Values of 0,
1, 2, and 3 correspond to the ranges for auto-regressive coefficients of
[-2, 2), [-1, 1), [-0.5, 0.5) and [-0.25, 0.25) respectively.
* - __u8
- ``grain_scale_shift``
- Specifies how much the Gaussian random numbers should be scaled down
during the grain synthesis process.
* - __u8
- ``cb_mult``
- Represents a multiplier for the cb component used in derivation of the
input index to the cb component scaling function.
* - __u8
- ``cb_luma_mult``
- Represents a multiplier for the average luma component used in
derivation of the input index to the cb component scaling function..
* - __u8
- ``cr_luma_mult``
- Represents a multiplier for the average luma component used in
derivation of the input index to the cr component scaling function.
* - __u16
- ``cb_offset``
- Represents an offset used in derivation of the input index to the
cb component scaling function.
* - __u16
- ``cr_offset``
- Represents an offset used in derivation of the input index to the
cr component scaling function.
* - __u8
- ``reserved[4]``
- Applications and drivers must set this to zero.
.. _av1_film_grain_flags:
``AV1 Film Grain Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_AV1_FILM_GRAIN_FLAG_APPLY_GRAIN``
- 0x00000001
- If set, specifies that film grain should be added to this frame. If not
set, specifies that film grain should not be added.
* - ``V4L2_AV1_FILM_GRAIN_FLAG_UPDATE_GRAIN``
- 0x00000002
- If set, means that a new set of parameters should be sent. If not set,
specifies that the previous set of parameters should be used.
* - ``V4L2_AV1_FILM_GRAIN_FLAG_CHROMA_SCALING_FROM_LUMA``
- 0x00000004
- If set, specifies that the chroma scaling is inferred from the luma
scaling.
* - ``V4L2_AV1_FILM_GRAIN_FLAG_OVERLAP``
- 0x00000008
- If set, indicates that the overlap between film grain blocks shall be
applied. If not set, indicates that the overlap between film grain blocks
shall not be applied.
* - ``V4L2_AV1_FILM_GRAIN_FLAG_CLIP_TO_RESTRICTED_RANGE``
- 0x00000010
- If set, indicates that clipping to the restricted (studio, i.e. limited)
range shall be applied to the sample values after adding the film grain
(see the semantics for color_range for an explanation of studio swing).
If not set, indicates that clipping to the full range shall be applied
to the sample values after adding the film grain.
|
