Libav
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00001 /* 00002 * Atrac 3 compatible decoder data 00003 * Copyright (c) 2006-2007 Maxim Poliakovski 00004 * Copyright (c) 2006-2007 Benjamin Larsson 00005 * 00006 * This file is part of FFmpeg. 00007 * 00008 * FFmpeg is free software; you can redistribute it and/or 00009 * modify it under the terms of the GNU Lesser General Public 00010 * License as published by the Free Software Foundation; either 00011 * version 2.1 of the License, or (at your option) any later version. 00012 * 00013 * FFmpeg is distributed in the hope that it will be useful, 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00016 * Lesser General Public License for more details. 00017 * 00018 * You should have received a copy of the GNU Lesser General Public 00019 * License along with FFmpeg; if not, write to the Free Software 00020 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00021 */ 00022 00028 #ifndef AVCODEC_ATRAC3DATA_H 00029 #define AVCODEC_ATRAC3DATA_H 00030 00031 #include <stdint.h> 00032 00033 /* VLC tables */ 00034 00035 static const uint8_t huffcode1[9] = { 00036 0x0,0x4,0x5,0xC,0xD,0x1C,0x1D,0x1E,0x1F, 00037 }; 00038 00039 static const uint8_t huffbits1[9] = { 00040 1,3,3,4,4,5,5,5,5, 00041 }; 00042 00043 static const uint8_t huffcode2[5] = { 00044 0x0,0x4,0x5,0x6,0x7, 00045 }; 00046 00047 static const uint8_t huffbits2[5] = { 00048 1,3,3,3,3, 00049 }; 00050 00051 static const uint8_t huffcode3[7] = { 00052 0x0,0x4,0x5,0xC,0xD,0xE,0xF, 00053 }; 00054 00055 static const uint8_t huffbits3[7] = { 00056 1,3,3,4,4,4,4, 00057 }; 00058 00059 static const uint8_t huffcode4[9] = { 00060 0x0,0x4,0x5,0xC,0xD,0x1C,0x1D,0x1E,0x1F, 00061 }; 00062 00063 static const uint8_t huffbits4[9] = { 00064 1,3,3,4,4,5,5,5,5, 00065 }; 00066 00067 static const uint8_t huffcode5[15] = { 00068 0x0,0x2,0x3,0x8,0x9,0xA,0xB,0x1C,0x1D,0x3C,0x3D,0x3E,0x3F,0xC,0xD, 00069 }; 00070 00071 static const uint8_t huffbits5[15] = { 00072 2,3,3,4,4,4,4,5,5,6,6,6,6,4,4 00073 }; 00074 00075 static const uint8_t huffcode6[31] = { 00076 0x0,0x2,0x3,0x4,0x5,0x6,0x7,0x14,0x15,0x16,0x17,0x18,0x19,0x34,0x35, 00077 0x36,0x37,0x38,0x39,0x3A,0x3B,0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F,0x8,0x9, 00078 }; 00079 00080 static const uint8_t huffbits6[31] = { 00081 3,4,4,4,4,4,4,5,5,5,5,5,5,6,6,6,6,6,6,6,6,7,7,7,7,7,7,7,7,4,4 00082 }; 00083 00084 static const uint8_t huffcode7[63] = { 00085 0x0,0x8,0x9,0xA,0xB,0xC,0xD,0xE,0xF,0x10,0x11,0x24,0x25,0x26,0x27,0x28, 00086 0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x68,0x69,0x6A,0x6B,0x6C, 00087 0x6D,0x6E,0x6F,0x70,0x71,0x72,0x73,0x74,0x75,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2, 00088 0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,0x2,0x3, 00089 }; 00090 00091 static const uint8_t huffbits7[63] = { 00092 3,5,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,7,7,7,7,7, 00093 7,7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,4,4 00094 }; 00095 00096 static const uint8_t huff_tab_sizes[7] = { 00097 9, 5, 7, 9, 15, 31, 63, 00098 }; 00099 00100 static const uint8_t* const huff_codes[7] = { 00101 huffcode1,huffcode2,huffcode3,huffcode4,huffcode5,huffcode6,huffcode7, 00102 }; 00103 00104 static const uint8_t* const huff_bits[7] = { 00105 huffbits1,huffbits2,huffbits3,huffbits4,huffbits5,huffbits6,huffbits7, 00106 }; 00107 00108 static const uint16_t atrac3_vlc_offs[] = { 00109 0,512,1024,1536,2048,2560,3072,3584,4096 00110 }; 00111 00112 /* selector tables */ 00113 00114 static const uint8_t CLCLengthTab[8] = {0, 4, 3, 3, 4, 4, 5, 6}; 00115 static const int8_t seTab_0[4] = {0, 1, -2, -1}; 00116 static const int8_t decTable1[18] = {0,0, 0,1, 0,-1, 1,0, -1,0, 1,1, 1,-1, -1,1, -1,-1}; 00117 00118 00119 /* tables for the scalefactor decoding */ 00120 00121 static const float iMaxQuant[8] = { 00122 0.0, 1.0/1.5, 1.0/2.5, 1.0/3.5, 1.0/4.5, 1.0/7.5, 1.0/15.5, 1.0/31.5 00123 }; 00124 00125 static const uint16_t subbandTab[33] = { 00126 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 00127 256, 288, 320, 352, 384, 416, 448, 480, 512, 576, 640, 704, 768, 896, 1024 00128 }; 00129 00130 /* joint stereo related tables */ 00131 static const float matrixCoeffs[8] = {0.0, 2.0, 2.0, 2.0, 0.0, 0.0, 1.0, 1.0}; 00132 00133 #endif /* AVCODEC_ATRAC3DATA_H */