mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
2.6 KiB
64 lines
2.6 KiB
/* |
|
* 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 |
|
* Atrac 1 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, // midle 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 */
|
|
|