| 1 | /* |
| 2 | * AAC decoder data |
| 3 | * Copyright (c) 2005-2006 Oded Shimon ( ods15 ods15 dyndns org ) |
| 4 | * Copyright (c) 2006-2007 Maxim Gavrilov ( maxim.gavrilov gmail com ) |
| 5 | * |
| 6 | * This file is part of FFmpeg. |
| 7 | * |
| 8 | * FFmpeg is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Lesser General Public |
| 10 | * License as published by the Free Software Foundation; either |
| 11 | * version 2.1 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * FFmpeg is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * Lesser General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public |
| 19 | * License along with FFmpeg; if not, write to the Free Software |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 21 | */ |
| 22 | |
| 23 | /** |
| 24 | * @file |
| 25 | * AAC decoder data |
| 26 | * @author Oded Shimon ( ods15 ods15 dyndns org ) |
| 27 | * @author Maxim Gavrilov ( maxim.gavrilov gmail com ) |
| 28 | */ |
| 29 | |
| 30 | #ifndef AVCODEC_AACDECTAB_H |
| 31 | #define AVCODEC_AACDECTAB_H |
| 32 | |
| 33 | #include "libavutil/channel_layout.h" |
| 34 | #include "aac.h" |
| 35 | |
| 36 | #include <stdint.h> |
| 37 | |
| 38 | /* @name ltp_coef |
| 39 | * Table of the LTP coefficients |
| 40 | */ |
| 41 | static const float ltp_coef[8] = { |
| 42 | 0.570829, 0.696616, 0.813004, 0.911304, |
| 43 | 0.984900, 1.067894, 1.194601, 1.369533, |
| 44 | }; |
| 45 | |
| 46 | /* @name tns_tmp2_map |
| 47 | * Tables of the tmp2[] arrays of LPC coefficients used for TNS. |
| 48 | * The suffix _M_N[] indicate the values of coef_compress and coef_res |
| 49 | * respectively. |
| 50 | * @{ |
| 51 | */ |
| 52 | static const float tns_tmp2_map_1_3[4] = { |
| 53 | 0.00000000, -0.43388373, 0.64278758, 0.34202015, |
| 54 | }; |
| 55 | |
| 56 | static const float tns_tmp2_map_0_3[8] = { |
| 57 | 0.00000000, -0.43388373, -0.78183150, -0.97492790, |
| 58 | 0.98480773, 0.86602539, 0.64278758, 0.34202015, |
| 59 | }; |
| 60 | |
| 61 | static const float tns_tmp2_map_1_4[8] = { |
| 62 | 0.00000000, -0.20791170, -0.40673664, -0.58778524, |
| 63 | 0.67369562, 0.52643216, 0.36124167, 0.18374951, |
| 64 | }; |
| 65 | |
| 66 | static const float tns_tmp2_map_0_4[16] = { |
| 67 | 0.00000000, -0.20791170, -0.40673664, -0.58778524, |
| 68 | -0.74314481, -0.86602539, -0.95105654, -0.99452192, |
| 69 | 0.99573416, 0.96182561, 0.89516330, 0.79801720, |
| 70 | 0.67369562, 0.52643216, 0.36124167, 0.18374951, |
| 71 | }; |
| 72 | |
| 73 | static const float * const tns_tmp2_map[4] = { |
| 74 | tns_tmp2_map_0_3, |
| 75 | tns_tmp2_map_0_4, |
| 76 | tns_tmp2_map_1_3, |
| 77 | tns_tmp2_map_1_4 |
| 78 | }; |
| 79 | // @} |
| 80 | |
| 81 | static const int8_t tags_per_config[16] = { 0, 1, 1, 2, 3, 3, 4, 5, 0, 0, 0, 0, 0, 0, 0, 0 }; |
| 82 | |
| 83 | static const uint8_t aac_channel_layout_map[7][5][3] = { |
| 84 | { { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, }, |
| 85 | { { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, }, |
| 86 | { { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, }, |
| 87 | { { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_SCE, 1, AAC_CHANNEL_BACK }, }, |
| 88 | { { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 1, AAC_CHANNEL_BACK }, }, |
| 89 | { { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 1, AAC_CHANNEL_BACK }, { TYPE_LFE, 0, AAC_CHANNEL_LFE }, }, |
| 90 | { { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 1, AAC_CHANNEL_FRONT }, { TYPE_CPE, 2, AAC_CHANNEL_BACK }, { TYPE_LFE, 0, AAC_CHANNEL_LFE }, }, |
| 91 | }; |
| 92 | |
| 93 | static const uint64_t aac_channel_layout[8] = { |
| 94 | AV_CH_LAYOUT_MONO, |
| 95 | AV_CH_LAYOUT_STEREO, |
| 96 | AV_CH_LAYOUT_SURROUND, |
| 97 | AV_CH_LAYOUT_4POINT0, |
| 98 | AV_CH_LAYOUT_5POINT0_BACK, |
| 99 | AV_CH_LAYOUT_5POINT1_BACK, |
| 100 | AV_CH_LAYOUT_7POINT1_WIDE_BACK, |
| 101 | 0, |
| 102 | }; |
| 103 | |
| 104 | #endif /* AVCODEC_AACDECTAB_H */ |