File: vp9quant.c

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/*
 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#include "vp9quant.h"

#define BIT_DEPTH_MODE_COUNT 3
#define MODE_8BITS_DEPTH 0
#define MODE_12BITS_DEPTH 2

static const int16_t dc_qlookup[BIT_DEPTH_MODE_COUNT][QINDEX_RANGE] = {
    {
        4, 8, 8, 9, 10, 11, 12, 12,
        13, 14, 15, 16, 17, 18, 19, 19,
        20, 21, 22, 23, 24, 25, 26, 26,
        27, 28, 29, 30, 31, 32, 32, 33,
        34, 35, 36, 37, 38, 38, 39, 40,
        41, 42, 43, 43, 44, 45, 46, 47,
        48, 48, 49, 50, 51, 52, 53, 53,
        54, 55, 56, 57, 57, 58, 59, 60,
        61, 62, 62, 63, 64, 65, 66, 66,
        67, 68, 69, 70, 70, 71, 72, 73,
        74, 74, 75, 76, 77, 78, 78, 79,
        80, 81, 81, 82, 83, 84, 85, 85,
        87, 88, 90, 92, 93, 95, 96, 98,
        99, 101, 102, 104, 105, 107, 108, 110,
        111, 113, 114, 116, 117, 118, 120, 121,
        123, 125, 127, 129, 131, 134, 136, 138,
        140, 142, 144, 146, 148, 150, 152, 154,
        156, 158, 161, 164, 166, 169, 172, 174,
        177, 180, 182, 185, 187, 190, 192, 195,
        199, 202, 205, 208, 211, 214, 217, 220,
        223, 226, 230, 233, 237, 240, 243, 247,
        250, 253, 257, 261, 265, 269, 272, 276,
        280, 284, 288, 292, 296, 300, 304, 309,
        313, 317, 322, 326, 330, 335, 340, 344,
        349, 354, 359, 364, 369, 374, 379, 384,
        389, 395, 400, 406, 411, 417, 423, 429,
        435, 441, 447, 454, 461, 467, 475, 482,
        489, 497, 505, 513, 522, 530, 539, 549,
        559, 569, 579, 590, 602, 614, 626, 640,
        654, 668, 684, 700, 717, 736, 755, 775,
        796, 819, 843, 869, 896, 925, 955, 988,
        1022, 1058, 1098, 1139, 1184, 1232, 1282, 1336,
    },
    {
        4, 9, 10, 13, 15, 17, 20, 22,
        25, 28, 31, 34, 37, 40, 43, 47,
        50, 53, 57, 60, 64, 68, 71, 75,
        78, 82, 86, 90, 93, 97, 101, 105,
        109, 113, 116, 120, 124, 128, 132, 136,
        140, 143, 147, 151, 155, 159, 163, 166,
        170, 174, 178, 182, 185, 189, 193, 197,
        200, 204, 208, 212, 215, 219, 223, 226,
        230, 233, 237, 241, 244, 248, 251, 255,
        259, 262, 266, 269, 273, 276, 280, 283,
        287, 290, 293, 297, 300, 304, 307, 310,
        314, 317, 321, 324, 327, 331, 334, 337,
        343, 350, 356, 362, 369, 375, 381, 387,
        394, 400, 406, 412, 418, 424, 430, 436,
        442, 448, 454, 460, 466, 472, 478, 484,
        490, 499, 507, 516, 525, 533, 542, 550,
        559, 567, 576, 584, 592, 601, 609, 617,
        625, 634, 644, 655, 666, 676, 687, 698,
        708, 718, 729, 739, 749, 759, 770, 782,
        795, 807, 819, 831, 844, 856, 868, 880,
        891, 906, 920, 933, 947, 961, 975, 988,
        1001, 1015, 1030, 1045, 1061, 1076, 1090, 1105,
        1120, 1137, 1153, 1170, 1186, 1202, 1218, 1236,
        1253, 1271, 1288, 1306, 1323, 1342, 1361, 1379,
        1398, 1416, 1436, 1456, 1476, 1496, 1516, 1537,
        1559, 1580, 1601, 1624, 1647, 1670, 1692, 1717,
        1741, 1766, 1791, 1817, 1844, 1871, 1900, 1929,
        1958, 1990, 2021, 2054, 2088, 2123, 2159, 2197,
        2236, 2276, 2319, 2363, 2410, 2458, 2508, 2561,
        2616, 2675, 2737, 2802, 2871, 2944, 3020, 3102,
        3188, 3280, 3375, 3478, 3586, 3702, 3823, 3953,
        4089, 4236, 4394, 4559, 4737, 4929, 5130, 5347,
    },
    {
        4, 12, 18, 25, 33, 41, 50, 60,
        70, 80, 91, 103, 115, 127, 140, 153,
        166, 180, 194, 208, 222, 237, 251, 266,
        281, 296, 312, 327, 343, 358, 374, 390,
        405, 421, 437, 453, 469, 484, 500, 516,
        532, 548, 564, 580, 596, 611, 627, 643,
        659, 674, 690, 706, 721, 737, 752, 768,
        783, 798, 814, 829, 844, 859, 874, 889,
        904, 919, 934, 949, 964, 978, 993, 1008,
        1022, 1037, 1051, 1065, 1080, 1094, 1108, 1122,
        1136, 1151, 1165, 1179, 1192, 1206, 1220, 1234,
        1248, 1261, 1275, 1288, 1302, 1315, 1329, 1342,
        1368, 1393, 1419, 1444, 1469, 1494, 1519, 1544,
        1569, 1594, 1618, 1643, 1668, 1692, 1717, 1741,
        1765, 1789, 1814, 1838, 1862, 1885, 1909, 1933,
        1957, 1992, 2027, 2061, 2096, 2130, 2165, 2199,
        2233, 2267, 2300, 2334, 2367, 2400, 2434, 2467,
        2499, 2532, 2575, 2618, 2661, 2704, 2746, 2788,
        2830, 2872, 2913, 2954, 2995, 3036, 3076, 3127,
        3177, 3226, 3275, 3324, 3373, 3421, 3469, 3517,
        3565, 3621, 3677, 3733, 3788, 3843, 3897, 3951,
        4005, 4058, 4119, 4181, 4241, 4301, 4361, 4420,
        4479, 4546, 4612, 4677, 4742, 4807, 4871, 4942,
        5013, 5083, 5153, 5222, 5291, 5367, 5442, 5517,
        5591, 5665, 5745, 5825, 5905, 5984, 6063, 6149,
        6234, 6319, 6404, 6495, 6587, 6678, 6769, 6867,
        6966, 7064, 7163, 7269, 7376, 7483, 7599, 7715,
        7832, 7958, 8085, 8214, 8352, 8492, 8635, 8788,
        8945, 9104, 9275, 9450, 9639, 9832, 10031, 10245,
        10465, 10702, 10946, 11210, 11482, 11776, 12081, 12409,
        12750, 13118, 13501, 13913, 14343, 14807, 15290, 15812,
        16356, 16943, 17575, 18237, 18949, 19718, 20521, 21387,
    }
};

static const int16_t ac_qlookup[BIT_DEPTH_MODE_COUNT][QINDEX_RANGE] = {
    {
        4, 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,
        104, 106, 108, 110, 112, 114, 116, 118,
        120, 122, 124, 126, 128, 130, 132, 134,
        136, 138, 140, 142, 144, 146, 148, 150,
        152, 155, 158, 161, 164, 167, 170, 173,
        176, 179, 182, 185, 188, 191, 194, 197,
        200, 203, 207, 211, 215, 219, 223, 227,
        231, 235, 239, 243, 247, 251, 255, 260,
        265, 270, 275, 280, 285, 290, 295, 300,
        305, 311, 317, 323, 329, 335, 341, 347,
        353, 359, 366, 373, 380, 387, 394, 401,
        408, 416, 424, 432, 440, 448, 456, 465,
        474, 483, 492, 501, 510, 520, 530, 540,
        550, 560, 571, 582, 593, 604, 615, 627,
        639, 651, 663, 676, 689, 702, 715, 729,
        743, 757, 771, 786, 801, 816, 832, 848,
        864, 881, 898, 915, 933, 951, 969, 988,
        1007, 1026, 1046, 1066, 1087, 1108, 1129, 1151,
        1173, 1196, 1219, 1243, 1267, 1292, 1317, 1343,
        1369, 1396, 1423, 1451, 1479, 1508, 1537, 1567,
        1597, 1628, 1660, 1692, 1725, 1759, 1793, 1828,
    },
    {
        4, 9, 11, 13, 16, 18, 21, 24,
        27, 30, 33, 37, 40, 44, 48, 51,
        55, 59, 63, 67, 71, 75, 79, 83,
        88, 92, 96, 100, 105, 109, 114, 118,
        122, 127, 131, 136, 140, 145, 149, 154,
        158, 163, 168, 172, 177, 181, 186, 190,
        195, 199, 204, 208, 213, 217, 222, 226,
        231, 235, 240, 244, 249, 253, 258, 262,
        267, 271, 275, 280, 284, 289, 293, 297,
        302, 306, 311, 315, 319, 324, 328, 332,
        337, 341, 345, 349, 354, 358, 362, 367,
        371, 375, 379, 384, 388, 392, 396, 401,
        409, 417, 425, 433, 441, 449, 458, 466,
        474, 482, 490, 498, 506, 514, 523, 531,
        539, 547, 555, 563, 571, 579, 588, 596,
        604, 616, 628, 640, 652, 664, 676, 688,
        700, 713, 725, 737, 749, 761, 773, 785,
        797, 809, 825, 841, 857, 873, 889, 905,
        922, 938, 954, 970, 986, 1002, 1018, 1038,
        1058, 1078, 1098, 1118, 1138, 1158, 1178, 1198,
        1218, 1242, 1266, 1290, 1314, 1338, 1362, 1386,
        1411, 1435, 1463, 1491, 1519, 1547, 1575, 1603,
        1631, 1663, 1695, 1727, 1759, 1791, 1823, 1859,
        1895, 1931, 1967, 2003, 2039, 2079, 2119, 2159,
        2199, 2239, 2283, 2327, 2371, 2415, 2459, 2507,
        2555, 2603, 2651, 2703, 2755, 2807, 2859, 2915,
        2971, 3027, 3083, 3143, 3203, 3263, 3327, 3391,
        3455, 3523, 3591, 3659, 3731, 3803, 3876, 3952,
        4028, 4104, 4184, 4264, 4348, 4432, 4516, 4604,
        4692, 4784, 4876, 4972, 5068, 5168, 5268, 5372,
        5476, 5584, 5692, 5804, 5916, 6032, 6148, 6268,
        6388, 6512, 6640, 6768, 6900, 7036, 7172, 7312,
    },
    {
        4, 13, 19, 27, 35, 44, 54, 64,
        75, 87, 99, 112, 126, 139, 154, 168,
        183, 199, 214, 230, 247, 263, 280, 297,
        314, 331, 349, 366, 384, 402, 420, 438,
        456, 475, 493, 511, 530, 548, 567, 586,
        604, 623, 642, 660, 679, 698, 716, 735,
        753, 772, 791, 809, 828, 846, 865, 884,
        902, 920, 939, 957, 976, 994, 1012, 1030,
        1049, 1067, 1085, 1103, 1121, 1139, 1157, 1175,
        1193, 1211, 1229, 1246, 1264, 1282, 1299, 1317,
        1335, 1352, 1370, 1387, 1405, 1422, 1440, 1457,
        1474, 1491, 1509, 1526, 1543, 1560, 1577, 1595,
        1627, 1660, 1693, 1725, 1758, 1791, 1824, 1856,
        1889, 1922, 1954, 1987, 2020, 2052, 2085, 2118,
        2150, 2183, 2216, 2248, 2281, 2313, 2346, 2378,
        2411, 2459, 2508, 2556, 2605, 2653, 2701, 2750,
        2798, 2847, 2895, 2943, 2992, 3040, 3088, 3137,
        3185, 3234, 3298, 3362, 3426, 3491, 3555, 3619,
        3684, 3748, 3812, 3876, 3941, 4005, 4069, 4149,
        4230, 4310, 4390, 4470, 4550, 4631, 4711, 4791,
        4871, 4967, 5064, 5160, 5256, 5352, 5448, 5544,
        5641, 5737, 5849, 5961, 6073, 6185, 6297, 6410,
        6522, 6650, 6778, 6906, 7034, 7162, 7290, 7435,
        7579, 7723, 7867, 8011, 8155, 8315, 8475, 8635,
        8795, 8956, 9132, 9308, 9484, 9660, 9836, 10028,
        10220, 10412, 10604, 10812, 11020, 11228, 11437, 11661,
        11885, 12109, 12333, 12573, 12813, 13053, 13309, 13565,
        13821, 14093, 14365, 14637, 14925, 15213, 15502, 15806,
        16110, 16414, 16734, 17054, 17390, 17726, 18062, 18414,
        18766, 19134, 19502, 19886, 20270, 20670, 21070, 21486,
        21902, 22334, 22766, 23214, 23662, 24126, 24590, 25070,
        25551, 26047, 26559, 27071, 27599, 28143, 28687, 29247,
    }
};

int clamp(int value, int low, int high)
{
    return value < low ? low : (value > high ? high : value);
}

int16_t vp9_dc_quant(int bit_depth, int qindex, int delta)
{
    if (bit_depth > MODE_12BITS_DEPTH || bit_depth < MODE_8BITS_DEPTH) {
        bit_depth = MODE_8BITS_DEPTH;
        printf("WARNING: bit depth of vp9 should be in the range 8bitS(0),10bits(1) and 12bits(2).\n");
    }
    const uint8_t q = clamp(qindex + delta, 0, MAXQ);
    return dc_qlookup[bit_depth][q];
}

int16_t vp9_ac_quant(int bit_depth, int qindex, int delta)
{
    if (bit_depth > MODE_12BITS_DEPTH || bit_depth < MODE_8BITS_DEPTH) {
        bit_depth = MODE_8BITS_DEPTH;
        printf("WARNING: bit depth of vp9 should be in the range 8bitS(0),10bits(1) and 12bits(2).\n");
    }
    const uint8_t q = clamp(qindex + delta, 0, MAXQ);
    return ac_qlookup[bit_depth][q];
}