| /* |
| * ATRAC 1 compatible decoder data |
| * Copyright (c) 2009 Maxim Poliakovski |
| * Copyright (c) 2009 Benjamin Larsson |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * ATRAC1 compatible decoder data |
| */ |
| |
| #ifndef AVCODEC_ATRAC1DATA_H |
| #define AVCODEC_ATRAC1DATA_H |
| |
| #include <stdint.h> |
| |
| static const uint8_t bfu_amount_tab1[8] = {20, 28, 32, 36, 40, 44, 48, 52}; |
| static const uint8_t bfu_amount_tab2[4] = { 0, 112, 176, 208}; |
| static const uint8_t bfu_amount_tab3[8] = { 0, 24, 36, 48, 72, 108, 132, 156}; |
| |
| /** number of BFUs in each QMF band */ |
| static const uint8_t bfu_bands_t[4] = {0, 20, 36, 52}; |
| |
| /** number of spectral lines in each BFU |
| * block floating unit = group of spectral frequencies having the |
| * same quantization parameters like word length and scale factor |
| */ |
| static const uint8_t specs_per_bfu[52] = { |
| 8, 8, 8, 8, 4, 4, 4, 4, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, // low band |
| 6, 6, 6, 6, 7, 7, 7, 7, 9, 9, 9, 9, 10, 10, 10, 10, // middle band |
| 12, 12, 12, 12, 12, 12, 12, 12, 20, 20, 20, 20, 20, 20, 20, 20 // high band |
| }; |
| |
| /** start position of each BFU in the MDCT spectrum for the long mode */ |
| static const uint16_t bfu_start_long[52] = { |
| 0, 8, 16, 24, 32, 36, 40, 44, 48, 56, 64, 72, 80, 86, 92, 98, 104, 110, 116, 122, |
| 128, 134, 140, 146, 152, 159, 166, 173, 180, 189, 198, 207, 216, 226, 236, 246, |
| 256, 268, 280, 292, 304, 316, 328, 340, 352, 372, 392, 412, 432, 452, 472, 492, |
| }; |
| |
| /** start position of each BFU in the MDCT spectrum for the short mode */ |
| static const uint16_t bfu_start_short[52] = { |
| 0, 32, 64, 96, 8, 40, 72, 104, 12, 44, 76, 108, 20, 52, 84, 116, 26, 58, 90, 122, |
| 128, 160, 192, 224, 134, 166, 198, 230, 141, 173, 205, 237, 150, 182, 214, 246, |
| 256, 288, 320, 352, 384, 416, 448, 480, 268, 300, 332, 364, 396, 428, 460, 492 |
| }; |
| |
| #endif /* AVCODEC_ATRAC1DATA_H */ |
