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 huffcode1[9] = { 36 0x0, 0x4, 0x5, 0xC, 0xD, 0x1C, 0x1D, 0x1E, 0x1F 37 }; 38 39 static const uint8_t huffbits1[9] = { 1, 3, 3, 4, 4, 5, 5, 5, 5 }; 40 41 static const uint8_t huffcode2[5] = { 0x0, 0x4, 0x5, 0x6, 0x7 }; 42 43 static const uint8_t huffbits2[5] = { 1, 3, 3, 3, 3 }; 44 45 static const uint8_t huffcode3[7] = { 0x0, 0x4, 0x5, 0xC, 0xD, 0xE, 0xF }; 46 47 static const uint8_t huffbits3[7] = { 1, 3, 3, 4, 4, 4, 4 }; 48 49 static const uint8_t huffcode4[9] = { 50 0x0, 0x4, 0x5, 0xC, 0xD, 0x1C, 0x1D, 0x1E, 0x1F 51 }; 52 53 static const uint8_t huffbits4[9] = { 1, 3, 3, 4, 4, 5, 5, 5, 5 }; 54 55 static const uint8_t huffcode5[15] = { 56 0x00, 0x02, 0x03, 0x08, 0x09, 0x0A, 0x0B, 0x1C, 57 0x1D, 0x3C, 0x3D, 0x3E, 0x3F, 0x0C, 0x0D 58 }; 59 60 static const uint8_t huffbits5[15] = { 61 2, 3, 3, 4, 4, 4, 4, 5, 5, 6, 6, 6, 6, 4, 4 62 }; 63 64 static const uint8_t huffcode6[31] = { 65 0x00, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x14, 66 0x15, 0x16, 0x17, 0x18, 0x19, 0x34, 0x35, 0x36, 67 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x78, 0x79, 0x7A, 68 0x7B, 0x7C, 0x7D, 0x7E, 0x7F, 0x08, 0x09 69 }; 70 71 static const uint8_t huffbits6[31] = { 72 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 73 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4 74 }; 75 76 static const uint8_t huffcode7[63] = { 77 0x00, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 78 0x0F, 0x10, 0x11, 0x24, 0x25, 0x26, 0x27, 0x28, 79 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30, 80 0x31, 0x32, 0x33, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 81 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 82 0x75, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 83 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 84 0xFB, 0xFC, 0xFD, 0xFE, 0xFF, 0x02, 0x03 85 }; 86 87 static const uint8_t huffbits7[63] = { 88 3, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 89 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 90 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 91 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4 92 }; 93 94 static const uint8_t huff_tab_sizes[7] = { 95 9, 5, 7, 9, 15, 31, 63, 96 }; 97 98 static const uint8_t* const huff_codes[7] = { 99 huffcode1, huffcode2, huffcode3, huffcode4, huffcode5, huffcode6, huffcode7 100 }; 101 102 static const uint8_t* const huff_bits[7] = { 103 huffbits1, huffbits2, huffbits3, huffbits4, huffbits5, huffbits6, huffbits7, 104 }; 105 106 static const uint16_t atrac3_vlc_offs[9] = { 107 0, 512, 1024, 1536, 2048, 2560, 3072, 3584, 4096 108 }; 109 110 /* selector tables */ 111 112 static const uint8_t clc_length_tab[8] = { 0, 4, 3, 3, 4, 4, 5, 6 }; 113 114 static const int8_t mantissa_clc_tab[4] = { 0, 1, -2, -1 }; 115 116 static const int8_t mantissa_vlc_tab[18] = { 117 0, 0, 0, 1, 0, -1, 1, 0, -1, 0, 1, 1, 1, -1, -1, 1, -1, -1 118 }; 119 120 121 /* tables for the scalefactor decoding */ 122 123 static const float inv_max_quant[8] = { 124 0.0, 1.0 / 1.5, 1.0 / 2.5, 1.0 / 3.5, 125 1.0 / 4.5, 1.0 / 7.5, 1.0 / 15.5, 1.0 / 31.5 126 }; 127 128 static const uint16_t subband_tab[33] = { 129 0, 8, 16, 24, 32, 40, 48, 56, 130 64, 80, 96, 112, 128, 144, 160, 176, 131 192, 224, 256, 288, 320, 352, 384, 416, 132 448, 480, 512, 576, 640, 704, 768, 896, 133 1024 134 }; 135 136 /* joint stereo related tables */ 137 static const float matrix_coeffs[8] = { 138 0.0, 2.0, 2.0, 2.0, 0.0, 0.0, 1.0, 1.0 139 }; 140 141 #endif /* AVCODEC_ATRAC3DATA_H */ 142