repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * AC-3 and E-AC-3 decoder tables | |
| 3 | * Copyright (c) 2007 Bartlomiej Wolowiec <bartek.wolowiec@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 | * Tables taken directly from the AC-3 spec. | |
| 25 | */ | |
| 26 | ||
| 27 | #include "ac3dec_data.h" | |
| 28 | #include "ac3.h" | |
| 29 | ||
| 30 | /** | |
| 31 | * Table used to ungroup 3 values stored in 5 bits. | |
| 32 | * Used by bap=1 mantissas and GAQ. | |
| 33 | * ff_ac3_ungroup_3_in_5_bits_tab[i] = { i/9, (i%9)/3, (i%9)%3 } | |
| 34 | */ | |
| 35 | const uint8_t ff_ac3_ungroup_3_in_5_bits_tab[32][3] = { | |
| 36 | { 0, 0, 0 }, { 0, 0, 1 }, { 0, 0, 2 }, { 0, 1, 0 }, | |
| 37 | { 0, 1, 1 }, { 0, 1, 2 }, { 0, 2, 0 }, { 0, 2, 1 }, | |
| 38 | { 0, 2, 2 }, { 1, 0, 0 }, { 1, 0, 1 }, { 1, 0, 2 }, | |
| 39 | { 1, 1, 0 }, { 1, 1, 1 }, { 1, 1, 2 }, { 1, 2, 0 }, | |
| 40 | { 1, 2, 1 }, { 1, 2, 2 }, { 2, 0, 0 }, { 2, 0, 1 }, | |
| 41 | { 2, 0, 2 }, { 2, 1, 0 }, { 2, 1, 1 }, { 2, 1, 2 }, | |
| 42 | { 2, 2, 0 }, { 2, 2, 1 }, { 2, 2, 2 }, { 3, 0, 0 }, | |
| 43 | { 3, 0, 1 }, { 3, 0, 2 }, { 3, 1, 0 }, { 3, 1, 1 } | |
| 44 | }; | |
| 45 | ||
| 46 | const uint8_t ff_eac3_hebap_tab[64] = { | |
| 47 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 8, | |
| 48 | 8, 8, 9, 9, 9, 10, 10, 10, 10, 11, | |
| 49 | 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, | |
| 50 | 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, | |
| 51 | 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, | |
| 52 | 18, 18, 18, 18, 18, 19, 19, 19, 19, 19, | |
| 53 | 19, 19, 19, 19, | |
| 54 | }; | |
| 55 | ||
| 56 | /** | |
| 57 | * Table E2.15 Default Spectral Extension Banding Structure | |
| 58 | */ | |
| 59 | const uint8_t ff_eac3_default_spx_band_struct[17] = | |
| 60 | { 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 }; |