repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * ATRAC 1 compatible decoder data | |
| 3 | * Copyright (c) 2009 Maxim Poliakovski | |
| 4 | * Copyright (c) 2009 Benjamin Larsson | |
| 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 | * ATRAC1 compatible decoder data | |
| 26 | */ | |
| 27 | ||
| 28 | #ifndef AVCODEC_ATRAC1DATA_H | |
| 29 | #define AVCODEC_ATRAC1DATA_H | |
| 30 | ||
| 31 | #include <stdint.h> | |
| 32 | ||
| 33 | static const uint8_t bfu_amount_tab1[8] = {20, 28, 32, 36, 40, 44, 48, 52}; | |
| 34 | static const uint8_t bfu_amount_tab2[4] = { 0, 112, 176, 208}; | |
| 35 | static const uint8_t bfu_amount_tab3[8] = { 0, 24, 36, 48, 72, 108, 132, 156}; | |
| 36 | ||
| 37 | /** number of BFUs in each QMF band */ | |
| 38 | static const uint8_t bfu_bands_t[4] = {0, 20, 36, 52}; | |
| 39 | ||
| 40 | /** number of spectral lines in each BFU | |
| 41 | * block floating unit = group of spectral frequencies having the | |
| 42 | * same quantization parameters like word length and scale factor | |
| 43 | */ | |
| 44 | static const uint8_t specs_per_bfu[52] = { | |
| 45 | 8, 8, 8, 8, 4, 4, 4, 4, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, // low band | |
| 46 | 6, 6, 6, 6, 7, 7, 7, 7, 9, 9, 9, 9, 10, 10, 10, 10, // middle band | |
| 47 | 12, 12, 12, 12, 12, 12, 12, 12, 20, 20, 20, 20, 20, 20, 20, 20 // high band | |
| 48 | }; | |
| 49 | ||
| 50 | /** start position of each BFU in the MDCT spectrum for the long mode */ | |
| 51 | static const uint16_t bfu_start_long[52] = { | |
| 52 | 0, 8, 16, 24, 32, 36, 40, 44, 48, 56, 64, 72, 80, 86, 92, 98, 104, 110, 116, 122, | |
| 53 | 128, 134, 140, 146, 152, 159, 166, 173, 180, 189, 198, 207, 216, 226, 236, 246, | |
| 54 | 256, 268, 280, 292, 304, 316, 328, 340, 352, 372, 392, 412, 432, 452, 472, 492, | |
| 55 | }; | |
| 56 | ||
| 57 | /** start position of each BFU in the MDCT spectrum for the short mode */ | |
| 58 | static const uint16_t bfu_start_short[52] = { | |
| 59 | 0, 32, 64, 96, 8, 40, 72, 104, 12, 44, 76, 108, 20, 52, 84, 116, 26, 58, 90, 122, | |
| 60 | 128, 160, 192, 224, 134, 166, 198, 230, 141, 173, 205, 237, 150, 182, 214, 246, | |
| 61 | 256, 288, 320, 352, 384, 416, 448, 480, 268, 300, 332, 364, 396, 428, 460, 492 | |
| 62 | }; | |
| 63 | ||
| 64 | #endif /* AVCODEC_ATRAC1DATA_H */ |