2 * This file is part of Libav.
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 /* a*inverse[b]>>32 == a/b for all 0<=a<=16909558 && 2<=b<=256
22 * for a>16909558, is an overestimate by less than 1 part in 1<<24 */
23 const uint32_t ff_inverse[257]={
24 0, 4294967295U,2147483648U,1431655766, 1073741824, 858993460, 715827883, 613566757,
25 536870912, 477218589, 429496730, 390451573, 357913942, 330382100, 306783379, 286331154,
26 268435456, 252645136, 238609295, 226050911, 214748365, 204522253, 195225787, 186737709,
27 178956971, 171798692, 165191050, 159072863, 153391690, 148102321, 143165577, 138547333,
28 134217728, 130150525, 126322568, 122713352, 119304648, 116080198, 113025456, 110127367,
29 107374183, 104755300, 102261127, 99882961, 97612894, 95443718, 93368855, 91382283,
30 89478486, 87652394, 85899346, 84215046, 82595525, 81037119, 79536432, 78090315,
31 76695845, 75350304, 74051161, 72796056, 71582789, 70409300, 69273667, 68174085,
32 67108864, 66076420, 65075263, 64103990, 63161284, 62245903, 61356676, 60492498,
33 59652324, 58835169, 58040099, 57266231, 56512728, 55778797, 55063684, 54366675,
34 53687092, 53024288, 52377650, 51746594, 51130564, 50529028, 49941481, 49367441,
35 48806447, 48258060, 47721859, 47197443, 46684428, 46182445, 45691142, 45210183,
36 44739243, 44278014, 43826197, 43383509, 42949673, 42524429, 42107523, 41698712,
37 41297763, 40904451, 40518560, 40139882, 39768216, 39403370, 39045158, 38693400,
38 38347923, 38008561, 37675152, 37347542, 37025581, 36709123, 36398028, 36092163,
39 35791395, 35495598, 35204650, 34918434, 34636834, 34359739, 34087043, 33818641,
40 33554432, 33294321, 33038210, 32786010, 32537632, 32292988, 32051995, 31814573,
41 31580642, 31350127, 31122952, 30899046, 30678338, 30460761, 30246249, 30034737,
42 29826162, 29620465, 29417585, 29217465, 29020050, 28825284, 28633116, 28443493,
43 28256364, 28071682, 27889399, 27709467, 27531842, 27356480, 27183338, 27012373,
44 26843546, 26676816, 26512144, 26349493, 26188825, 26030105, 25873297, 25718368,
45 25565282, 25414008, 25264514, 25116768, 24970741, 24826401, 24683721, 24542671,
46 24403224, 24265352, 24129030, 23994231, 23860930, 23729102, 23598722, 23469767,
47 23342214, 23216040, 23091223, 22967740, 22845571, 22724695, 22605092, 22486740,
48 22369622, 22253717, 22139007, 22025474, 21913099, 21801865, 21691755, 21582751,
49 21474837, 21367997, 21262215, 21157475, 21053762, 20951060, 20849356, 20748635,
50 20648882, 20550083, 20452226, 20355296, 20259280, 20164166, 20069941, 19976593,
51 19884108, 19792477, 19701685, 19611723, 19522579, 19434242, 19346700, 19259944,
52 19173962, 19088744, 19004281, 18920561, 18837576, 18755316, 18673771, 18592933,
53 18512791, 18433337, 18354562, 18276457, 18199014, 18122225, 18046082, 17970575,
54 17895698, 17821442, 17747799, 17674763, 17602325, 17530479, 17459217, 17388532,
55 17318417, 17248865, 17179870, 17111424, 17043522, 16976156, 16909321, 16843010,
59 const uint8_t ff_sqrt_tab[256]={
60 0, 16, 23, 28, 32, 36, 40, 43, 46, 48, 51, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 77, 79, 80, 82, 84, 85, 87, 88, 90,
61 91, 92, 94, 95, 96, 98, 99,100,102,103,104,105,107,108,109,110,111,112,114,115,116,117,118,119,120,121,122,123,124,125,126,127,
62 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,144,145,146,147,148,149,150,151,151,152,153,154,155,156,156,
63 157,158,159,160,160,161,162,163,164,164,165,166,167,168,168,169,170,171,171,172,173,174,174,175,176,176,177,178,179,179,180,181,
64 182,182,183,184,184,185,186,186,187,188,188,189,190,190,191,192,192,193,194,194,195,196,196,197,198,198,199,200,200,201,202,202,
65 203,204,204,205,205,206,207,207,208,208,209,210,210,211,212,212,213,213,214,215,215,216,216,217,218,218,219,219,220,220,221,222,
66 222,223,223,224,224,225,226,226,227,227,228,228,229,230,230,231,231,232,232,233,233,234,235,235,236,236,237,237,238,238,239,239,
67 240,240,241,242,242,243,243,244,244,245,245,246,246,247,247,248,248,249,249,250,250,251,251,252,252,253,253,254,254,255,255,255
70 const uint8_t ff_reverse[256] = {
71 0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,
72 0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,
73 0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,
74 0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,
75 0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,
76 0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,
77 0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,
78 0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,
79 0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,
80 0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,
81 0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,
82 0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,
83 0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,
84 0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,
85 0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,
86 0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,
89 #define times4(x) x, x, x, x
90 #define times256(x) times4(times4(times4(times4(times4(x)))))
92 const uint8_t ff_cropTbl[256 + 2 * 1024] = {
94 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,
95 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,
96 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,
97 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F,
98 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F,
99 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5A,0x5B,0x5C,0x5D,0x5E,0x5F,
100 0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,
101 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F,
102 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,
103 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,
104 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,
105 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF,
106 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,
107 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,
108 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,
109 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,
113 const uint8_t ff_zigzag_direct[64] = {
114 0, 1, 8, 16, 9, 2, 3, 10,
115 17, 24, 32, 25, 18, 11, 4, 5,
116 12, 19, 26, 33, 40, 48, 41, 34,
117 27, 20, 13, 6, 7, 14, 21, 28,
118 35, 42, 49, 56, 57, 50, 43, 36,
119 29, 22, 15, 23, 30, 37, 44, 51,
120 58, 59, 52, 45, 38, 31, 39, 46,
121 53, 60, 61, 54, 47, 55, 62, 63