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 }; 48