blob: 52271be26e187aef0a15ef51f3d794e5d56e9a62
| 1 | /* |
| 2 | * Copyright (c) 2001-2003 The FFmpeg project |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | /** |
| 22 | * @file |
| 23 | * ADPCM tables |
| 24 | */ |
| 25 | |
| 26 | #include <stdint.h> |
| 27 | |
| 28 | /* ff_adpcm_step_table[] and ff_adpcm_index_table[] are from the ADPCM |
| 29 | reference source */ |
| 30 | static const int8_t adpcm_index_table2[4] = { |
| 31 | -1, 2, |
| 32 | -1, 2, |
| 33 | }; |
| 34 | |
| 35 | static const int8_t adpcm_index_table3[8] = { |
| 36 | -1, -1, 1, 2, |
| 37 | -1, -1, 1, 2, |
| 38 | }; |
| 39 | |
| 40 | const int8_t ff_adpcm_index_table[16] = { |
| 41 | -1, -1, -1, -1, 2, 4, 6, 8, |
| 42 | -1, -1, -1, -1, 2, 4, 6, 8, |
| 43 | }; |
| 44 | |
| 45 | static const int8_t adpcm_index_table5[32] = { |
| 46 | -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16, |
| 47 | -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16, |
| 48 | }; |
| 49 | |
| 50 | const int8_t * const ff_adpcm_index_tables[4] = { |
| 51 | &adpcm_index_table2[0], |
| 52 | &adpcm_index_table3[0], |
| 53 | &ff_adpcm_index_table[0], |
| 54 | &adpcm_index_table5[0], |
| 55 | }; |
| 56 | |
| 57 | /** |
| 58 | * This is the step table. Note that many programs use slight deviations from |
| 59 | * this table, but such deviations are negligible: |
| 60 | */ |
| 61 | const int16_t ff_adpcm_step_table[89] = { |
| 62 | 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, |
| 63 | 19, 21, 23, 25, 28, 31, 34, 37, 41, 45, |
| 64 | 50, 55, 60, 66, 73, 80, 88, 97, 107, 118, |
| 65 | 130, 143, 157, 173, 190, 209, 230, 253, 279, 307, |
| 66 | 337, 371, 408, 449, 494, 544, 598, 658, 724, 796, |
| 67 | 876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066, |
| 68 | 2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358, |
| 69 | 5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899, |
| 70 | 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767 |
| 71 | }; |
| 72 | |
| 73 | const int16_t ff_adpcm_oki_step_table[49] = { |
| 74 | 16, 17, 19, 21, 23, 25, 28, 31, 34, 37, |
| 75 | 41, 45, 50, 55, 60, 66, 73, 80, 88, 97, |
| 76 | 107, 118, 130, 143, 157, 173, 190, 209, 230, 253, |
| 77 | 279, 307, 337, 371, 408, 449, 494, 544, 598, 658, |
| 78 | 724, 796, 876, 963, 1060, 1166, 1282, 1411, 1552 |
| 79 | }; |
| 80 | |
| 81 | /* These are for MS-ADPCM */ |
| 82 | /* ff_adpcm_AdaptationTable[], ff_adpcm_AdaptCoeff1[], and |
| 83 | ff_adpcm_AdaptCoeff2[] are from libsndfile */ |
| 84 | const int16_t ff_adpcm_AdaptationTable[] = { |
| 85 | 230, 230, 230, 230, 307, 409, 512, 614, |
| 86 | 768, 614, 512, 409, 307, 230, 230, 230 |
| 87 | }; |
| 88 | |
| 89 | /** Divided by 4 to fit in 8-bit integers */ |
| 90 | const uint8_t ff_adpcm_AdaptCoeff1[] = { |
| 91 | 64, 128, 0, 48, 60, 115, 98 |
| 92 | }; |
| 93 | |
| 94 | /** Divided by 4 to fit in 8-bit integers */ |
| 95 | const int8_t ff_adpcm_AdaptCoeff2[] = { |
| 96 | 0, -64, 0, 16, 0, -52, -58 |
| 97 | }; |
| 98 | |
| 99 | const int16_t ff_adpcm_yamaha_indexscale[] = { |
| 100 | 230, 230, 230, 230, 307, 409, 512, 614, |
| 101 | 230, 230, 230, 230, 307, 409, 512, 614 |
| 102 | }; |
| 103 | |
| 104 | const int8_t ff_adpcm_yamaha_difflookup[] = { |
| 105 | 1, 3, 5, 7, 9, 11, 13, 15, |
| 106 | -1, -3, -5, -7, -9, -11, -13, -15 |
| 107 | }; |
| 108 | |
| 109 | const int16_t ff_adpcm_afc_coeffs[2][16] = { |
| 110 | { 0, 2048, 0, 1024, 4096, 3584, 3072, 4608, 4200, 4800, 5120, 2048, 1024, 64512, 64512, 63488 }, |
| 111 | { 0, 0, 2048, 1024, 63488, 64000, 64512, 62976, 63288, 63236, 62464, 63488, 64512, 1024, 0, 0 } |
| 112 | }; |
| 113 | |
| 114 | const int16_t ff_adpcm_mtaf_stepsize[32][16] = { |
| 115 | { 1, 5, 9, 13, 16, 20, 24, 28, |
| 116 | -1, -5, -9, -13, -16, -20, -24, -28, }, |
| 117 | { 2, 6, 11, 15, 20, 24, 29, 33, |
| 118 | -2, -6, -11, -15, -20, -24, -29, -33, }, |
| 119 | { 2, 7, 13, 18, 23, 28, 34, 39, |
| 120 | -2, -7, -13, -18, -23, -28, -34, -39, }, |
| 121 | { 3, 9, 15, 21, 28, 34, 40, 46, |
| 122 | -3, -9, -15, -21, -28, -34, -40, -46, }, |
| 123 | { 3, 11, 18, 26, 33, 41, 48, 56, |
| 124 | -3, -11, -18, -26, -33, -41, -48, -56, }, |
| 125 | { 4, 13, 22, 31, 40, 49, 58, 67, |
| 126 | -4, -13, -22, -31, -40, -49, -58, -67, }, |
| 127 | { 5, 16, 26, 37, 48, 59, 69, 80, |
| 128 | -5, -16, -26, -37, -48, -59, -69, -80, }, |
| 129 | { 6, 19, 31, 44, 57, 70, 82, 95, |
| 130 | -6, -19, -31, -44, -57, -70, -82, -95, }, |
| 131 | { 7, 22, 38, 53, 68, 83, 99, 114, |
| 132 | -7, -22, -38, -53, -68, -83, -99, -114, }, |
| 133 | { 9, 27, 45, 63, 81, 99, 117, 135, |
| 134 | -9, -27, -45, -63, -81, -99, -117, -135, }, |
| 135 | { 10, 32, 53, 75, 96, 118, 139, 161, |
| 136 | -10, -32, -53, -75, -96, -118, -139, -161, }, |
| 137 | { 12, 38, 64, 90, 115, 141, 167, 193, |
| 138 | -12, -38, -64, -90, -115, -141, -167, -193, }, |
| 139 | { 15, 45, 76, 106, 137, 167, 198, 228, |
| 140 | -15, -45, -76, -106, -137, -167, -198, -228, }, |
| 141 | { 18, 54, 91, 127, 164, 200, 237, 273, |
| 142 | -18, -54, -91, -127, -164, -200, -237, -273, }, |
| 143 | { 21, 65, 108, 152, 195, 239, 282, 326, |
| 144 | -21, -65, -108, -152, -195, -239, -282, -326, }, |
| 145 | { 25, 77, 129, 181, 232, 284, 336, 388, |
| 146 | -25, -77, -129, -181, -232, -284, -336, -388, }, |
| 147 | { 30, 92, 153, 215, 276, 338, 399, 461, |
| 148 | -30, -92, -153, -215, -276, -338, -399, -461, }, |
| 149 | { 36, 109, 183, 256, 329, 402, 476, 549, |
| 150 | -36, -109, -183, -256, -329, -402, -476, -549, }, |
| 151 | { 43, 130, 218, 305, 392, 479, 567, 654, |
| 152 | -43, -130, -218, -305, -392, -479, -567, -654, }, |
| 153 | { 52, 156, 260, 364, 468, 572, 676, 780, |
| 154 | -52, -156, -260, -364, -468, -572, -676, -780, }, |
| 155 | { 62, 186, 310, 434, 558, 682, 806, 930, |
| 156 | -62, -186, -310, -434, -558, -682, -806, -930, }, |
| 157 | { 73, 221, 368, 516, 663, 811, 958, 1106, |
| 158 | -73, -221, -368, -516, -663, -811, -958, -1106, }, |
| 159 | { 87, 263, 439, 615, 790, 966, 1142, 1318, |
| 160 | -87, -263, -439, -615, -790, -966, -1142, -1318, }, |
| 161 | { 104, 314, 523, 733, 942, 1152, 1361, 1571, |
| 162 | -104, -314, -523, -733, -942, -1152, -1361, -1571, }, |
| 163 | { 124, 374, 623, 873, 1122, 1372, 1621, 1871, |
| 164 | -124, -374, -623, -873, -1122, -1372, -1621, -1871, }, |
| 165 | { 148, 445, 743, 1040, 1337, 1634, 1932, 2229, |
| 166 | -148, -445, -743, -1040, -1337, -1634, -1932, -2229, }, |
| 167 | { 177, 531, 885, 1239, 1593, 1947, 2301, 2655, |
| 168 | -177, -531, -885, -1239, -1593, -1947, -2301, -2655, }, |
| 169 | { 210, 632, 1053, 1475, 1896, 2318, 2739, 3161, |
| 170 | -210, -632, -1053, -1475, -1896, -2318, -2739, -3161, }, |
| 171 | { 251, 753, 1255, 1757, 2260, 2762, 3264, 3766, |
| 172 | -251, -753, -1255, -1757, -2260, -2762, -3264, -3766, }, |
| 173 | { 299, 897, 1495, 2093, 2692, 3290, 3888, 4486, |
| 174 | -299, -897, -1495, -2093, -2692, -3290, -3888, -4486, }, |
| 175 | { 356, 1068, 1781, 2493, 3206, 3918, 4631, 5343, |
| 176 | -356, -1068, -1781, -2493, -3206, -3918, -4631, -5343, }, |
| 177 | { 424, 1273, 2121, 2970, 3819, 4668, 5516, 6365, |
| 178 | -424, -1273, -2121, -2970, -3819, -4668, -5516, -6365, }, |
| 179 | }; |
| 180 |