blob: 5fc9411232742b9a7c0e86a9814d9bb1ff8dba7b
| 1 | /* |
| 2 | * AAC encoder data |
| 3 | * Copyright (c) 2015 Rostislav Pehlivanov ( atomnuker gmail com ) |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | /** |
| 23 | * @file |
| 24 | * AAC encoder data |
| 25 | * @author Rostislav Pehlivanov ( atomnuker gmail com ) |
| 26 | */ |
| 27 | |
| 28 | #ifndef AVCODEC_AACENCTAB_H |
| 29 | #define AVCODEC_AACENCTAB_H |
| 30 | |
| 31 | #include "aac.h" |
| 32 | |
| 33 | /** Total number of usable codebooks **/ |
| 34 | #define CB_TOT 12 |
| 35 | |
| 36 | /** Total number of codebooks, including special ones **/ |
| 37 | #define CB_TOT_ALL 15 |
| 38 | |
| 39 | #define AAC_MAX_CHANNELS 8 |
| 40 | |
| 41 | extern const uint8_t *ff_aac_swb_size_1024[]; |
| 42 | extern const int ff_aac_swb_size_1024_len; |
| 43 | extern const uint8_t *ff_aac_swb_size_128[]; |
| 44 | extern const int ff_aac_swb_size_128_len; |
| 45 | |
| 46 | /** default channel configurations */ |
| 47 | static const uint8_t aac_chan_configs[AAC_MAX_CHANNELS][6] = { |
| 48 | {1, TYPE_SCE}, // 1 channel - single channel element |
| 49 | {1, TYPE_CPE}, // 2 channels - channel pair |
| 50 | {2, TYPE_SCE, TYPE_CPE}, // 3 channels - center + stereo |
| 51 | {3, TYPE_SCE, TYPE_CPE, TYPE_SCE}, // 4 channels - front center + stereo + back center |
| 52 | {3, TYPE_SCE, TYPE_CPE, TYPE_CPE}, // 5 channels - front center + stereo + back stereo |
| 53 | {4, TYPE_SCE, TYPE_CPE, TYPE_CPE, TYPE_LFE}, // 6 channels - front center + stereo + back stereo + LFE |
| 54 | {0}, // 7 channels - invalid without PCE |
| 55 | {5, TYPE_SCE, TYPE_CPE, TYPE_CPE, TYPE_CPE, TYPE_LFE}, // 8 channels - front center + front stereo + side stereo + back stereo + LFE |
| 56 | }; |
| 57 | |
| 58 | /** |
| 59 | * Table to remap channels from libavcodec's default order to AAC order. |
| 60 | */ |
| 61 | static const uint8_t aac_chan_maps[AAC_MAX_CHANNELS][AAC_MAX_CHANNELS] = { |
| 62 | { 0 }, |
| 63 | { 0, 1 }, |
| 64 | { 2, 0, 1 }, |
| 65 | { 2, 0, 1, 3 }, |
| 66 | { 2, 0, 1, 3, 4 }, |
| 67 | { 2, 0, 1, 4, 5, 3 }, |
| 68 | { 0 }, |
| 69 | { 2, 0, 1, 6, 7, 4, 5, 3 }, |
| 70 | }; |
| 71 | |
| 72 | /* duplicated from avpriv_mpeg4audio_sample_rates to avoid shared build |
| 73 | * failures */ |
| 74 | static const int mpeg4audio_sample_rates[16] = { |
| 75 | 96000, 88200, 64000, 48000, 44100, 32000, |
| 76 | 24000, 22050, 16000, 12000, 11025, 8000, 7350 |
| 77 | }; |
| 78 | |
| 79 | /** bits needed to code codebook run value for long windows */ |
| 80 | static const uint8_t run_value_bits_long[64] = { |
| 81 | 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, |
| 82 | 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 10, |
| 83 | 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, |
| 84 | 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 15 |
| 85 | }; |
| 86 | |
| 87 | /** bits needed to code codebook run value for short windows */ |
| 88 | static const uint8_t run_value_bits_short[16] = { |
| 89 | 3, 3, 3, 3, 3, 3, 3, 6, 6, 6, 6, 6, 6, 6, 6, 9 |
| 90 | }; |
| 91 | |
| 92 | /* TNS starting SFBs for long and short windows */ |
| 93 | static const uint8_t tns_min_sfb_short[16] = { |
| 94 | 2, 2, 2, 3, 3, 4, 6, 6, 8, 10, 10, 12, 12, 12, 12, 12 |
| 95 | }; |
| 96 | |
| 97 | static const uint8_t tns_min_sfb_long[16] = { |
| 98 | 12, 13, 15, 16, 17, 20, 25, 26, 24, 28, 30, 31, 31, 31, 31, 31 |
| 99 | }; |
| 100 | |
| 101 | static const uint8_t * const tns_min_sfb[2] = { |
| 102 | tns_min_sfb_long, tns_min_sfb_short |
| 103 | }; |
| 104 | |
| 105 | static const uint8_t * const run_value_bits[2] = { |
| 106 | run_value_bits_long, run_value_bits_short |
| 107 | }; |
| 108 | |
| 109 | /** Map to convert values from BandCodingPath index to a codebook index **/ |
| 110 | static const uint8_t aac_cb_out_map[CB_TOT_ALL] = {0,1,2,3,4,5,6,7,8,9,10,11,13,14,15}; |
| 111 | /** Inverse map to convert from codebooks to BandCodingPath indices **/ |
| 112 | static const uint8_t aac_cb_in_map[CB_TOT_ALL+1] = {0,1,2,3,4,5,6,7,8,9,10,11,0,12,13,14}; |
| 113 | |
| 114 | static const uint8_t aac_cb_range [12] = {0, 3, 3, 3, 3, 9, 9, 8, 8, 13, 13, 17}; |
| 115 | static const uint8_t aac_cb_maxval[12] = {0, 1, 1, 2, 2, 4, 4, 7, 7, 12, 12, 16}; |
| 116 | |
| 117 | static const unsigned char aac_maxval_cb[] = { |
| 118 | 0, 1, 3, 5, 5, 7, 7, 7, 9, 9, 9, 9, 9, 11 |
| 119 | }; |
| 120 | |
| 121 | static const int aacenc_profiles[] = { |
| 122 | FF_PROFILE_AAC_MAIN, |
| 123 | FF_PROFILE_AAC_LOW, |
| 124 | FF_PROFILE_AAC_LTP, |
| 125 | FF_PROFILE_MPEG2_AAC_LOW, |
| 126 | }; |
| 127 | |
| 128 | #endif /* AVCODEC_AACENCTAB_H */ |
| 129 |