1 /* 2 * ATRAC3 compatible decoder data 3 * Copyright (c) 2006-2007 Maxim Poliakovski 4 * Copyright (c) 2006-2007 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 * ATRAC3 AKA RealAudio 8 compatible decoder data 26 */ 27 28 #ifndef AVCODEC_ATRAC3DATA_H 29 #define AVCODEC_ATRAC3DATA_H 30 31 #include <stdint.h> 32 33 /* VLC tables */ 34 35 static const uint8_t atrac3_hufftabs[][2] = { 36 /* Spectral coefficient 1 - 9 entries */ 37 { 31, 1 }, { 32, 3 }, { 33, 3 }, { 34, 4 }, { 35, 4 }, 38 { 36, 5 }, { 37, 5 }, { 38, 5 }, { 39, 5 }, 39 /* Spectral coefficient 2 - 5 entries */ 40 { 31, 1 }, { 32, 3 }, { 30, 3 }, { 33, 3 }, { 29, 3 }, 41 /* Spectral coefficient 3 - 7 entries */ 42 { 31, 1 }, { 32, 3 }, { 30, 3 }, { 33, 4 }, 43 { 29, 4 }, { 34, 4 }, { 28, 4 }, 44 /* Spectral coefficient 4 - 9 entries */ 45 { 31, 1 }, { 32, 3 }, { 30, 3 }, { 33, 4 }, { 29, 4 }, 46 { 34, 5 }, { 28, 5 }, { 35, 5 }, { 27, 5 }, 47 /* Spectral coefficient 5 - 15 entries */ 48 { 31, 2 }, { 32, 3 }, { 30, 3 }, { 33, 4 }, { 29, 4 }, 49 { 34, 4 }, { 28, 4 }, { 38, 4 }, { 24, 4 }, { 35, 5 }, 50 { 27, 5 }, { 36, 6 }, { 26, 6 }, { 37, 6 }, { 25, 6 }, 51 /* Spectral coefficient 6 - 31 entries */ 52 { 31, 3 }, { 32, 4 }, { 30, 4 }, { 33, 4 }, { 29, 4 }, { 34, 4 }, 53 { 28, 4 }, { 46, 4 }, { 16, 4 }, { 35, 5 }, { 27, 5 }, { 36, 5 }, 54 { 26, 5 }, { 37, 5 }, { 25, 5 }, { 38, 6 }, { 24, 6 }, { 39, 6 }, 55 { 23, 6 }, { 40, 6 }, { 22, 6 }, { 41, 6 }, { 21, 6 }, { 42, 7 }, 56 { 20, 7 }, { 43, 7 }, { 19, 7 }, { 44, 7 }, { 18, 7 }, { 45, 7 }, 57 { 17, 7 }, 58 /* Spectral coefficient 7 - 63 entries */ 59 { 31, 3 }, { 62, 4 }, { 0, 4 }, { 32, 5 }, { 30, 5 }, { 33, 5 }, 60 { 29, 5 }, { 34, 5 }, { 28, 5 }, { 35, 5 }, { 27, 5 }, { 36, 5 }, 61 { 26, 5 }, { 37, 6 }, { 25, 6 }, { 38, 6 }, { 24, 6 }, { 39, 6 }, 62 { 23, 6 }, { 40, 6 }, { 22, 6 }, { 41, 6 }, { 21, 6 }, { 42, 6 }, 63 { 20, 6 }, { 43, 6 }, { 19, 6 }, { 44, 6 }, { 18, 6 }, { 45, 7 }, 64 { 17, 7 }, { 46, 7 }, { 16, 7 }, { 47, 7 }, { 15, 7 }, { 48, 7 }, 65 { 14, 7 }, { 49, 7 }, { 13, 7 }, { 50, 7 }, { 12, 7 }, { 51, 7 }, 66 { 11, 7 }, { 52, 8 }, { 10, 8 }, { 53, 8 }, { 9, 8 }, { 54, 8 }, 67 { 8, 8 }, { 55, 8 }, { 7, 8 }, { 56, 8 }, { 6, 8 }, { 57, 8 }, 68 { 5, 8 }, { 58, 8 }, { 4, 8 }, { 59, 8 }, { 3, 8 }, { 60, 8 }, 69 { 2, 8 }, { 61, 8 }, { 1, 8 }, 70 }; 71 72 static const uint8_t huff_tab_sizes[7] = { 73 9, 5, 7, 9, 15, 31, 63, 74 }; 75 76 /* selector tables */ 77 78 static const uint8_t clc_length_tab[8] = { 0, 4, 3, 3, 4, 4, 5, 6 }; 79 80 static const int8_t mantissa_clc_tab[4] = { 0, 1, -2, -1 }; 81 82 static const int8_t mantissa_vlc_tab[18] = { 83 0, 0, 0, 1, 0, -1, 1, 0, -1, 0, 1, 1, 1, -1, -1, 1, -1, -1 84 }; 85 86 87 /* tables for the scalefactor decoding */ 88 89 static const float inv_max_quant[8] = { 90 0.0, 1.0 / 1.5, 1.0 / 2.5, 1.0 / 3.5, 91 1.0 / 4.5, 1.0 / 7.5, 1.0 / 15.5, 1.0 / 31.5 92 }; 93 94 static const uint16_t subband_tab[33] = { 95 0, 8, 16, 24, 32, 40, 48, 56, 96 64, 80, 96, 112, 128, 144, 160, 176, 97 192, 224, 256, 288, 320, 352, 384, 416, 98 448, 480, 512, 576, 640, 704, 768, 896, 99 1024 100 }; 101 102 /* joint stereo related tables */ 103 static const float matrix_coeffs[8] = { 104 0.0, 2.0, 2.0, 2.0, 0.0, 0.0, 1.0, 1.0 105 }; 106 107 #endif /* AVCODEC_ATRAC3DATA_H */ 108