Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 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 |
||
| 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 | }; |