| 1 | /* |
| 2 | * This file is part of FFmpeg. |
| 3 | * |
| 4 | * FFmpeg 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. |
| 8 | * |
| 9 | * FFmpeg 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. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public |
| 15 | * License along with FFmpeg; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 17 | */ |
| 18 | |
| 19 | /** |
| 20 | * @file |
| 21 | * AAN (Arai, Agui and Nakajima) (I)DCT tables |
| 22 | */ |
| 23 | |
| 24 | #include <stdint.h> |
| 25 | |
| 26 | const uint16_t ff_aanscales[64] = { |
| 27 | /* precomputed values scaled up by 14 bits */ |
| 28 | 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520, |
| 29 | 22725, 31521, 29692, 26722, 22725, 17855, 12299, 6270, |
| 30 | 21407, 29692, 27969, 25172, 21407, 16819, 11585, 5906, |
| 31 | 19266, 26722, 25172, 22654, 19266, 15137, 10426, 5315, |
| 32 | 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520, |
| 33 | 12873, 17855, 16819, 15137, 12873, 10114, 6967, 3552, |
| 34 | 8867 , 12299, 11585, 10426, 8867, 6967, 4799, 2446, |
| 35 | 4520 , 6270, 5906, 5315, 4520, 3552, 2446, 1247 |
| 36 | }; |
| 37 | |
| 38 | const uint16_t ff_inv_aanscales[64] = { |
| 39 | 4096, 2953, 3135, 3483, 4096, 5213, 7568, 14846, |
| 40 | 2953, 2129, 2260, 2511, 2953, 3759, 5457, 10703, |
| 41 | 3135, 2260, 2399, 2666, 3135, 3990, 5793, 11363, |
| 42 | 3483, 2511, 2666, 2962, 3483, 4433, 6436, 12625, |
| 43 | 4096, 2953, 3135, 3483, 4096, 5213, 7568, 14846, |
| 44 | 5213, 3759, 3990, 4433, 5213, 6635, 9633, 18895, |
| 45 | 7568, 5457, 5793, 6436, 7568, 9633, 13985, 27432, |
| 46 | 14846, 10703, 11363, 12625, 14846, 18895, 27432, 53809, |
| 47 | }; |