atrac3data.h 3.9 KB
Newer Older
Benjamin Larsson's avatar
Benjamin Larsson committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133
/*
 * Atrac 3 compatible decoder data
 * Copyright (c) 2006-2007 Maxim Poliakovski
 * Copyright (c) 2006-2007 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 atrac3data.h
 * Atrac 3 AKA RealAudio 8 compatible decoder data
 */

/* VLC tables */

static const uint8_t huffcode1[9] = {
  0x0,0x4,0x5,0xC,0xD,0x1C,0x1D,0x1E,0x1F,
};

static const uint8_t huffbits1[9] = {
  1,3,3,4,4,5,5,5,5,
};

static const uint8_t huffcode2[5] = {
  0x0,0x4,0x5,0x6,0x7,
};

static const uint8_t huffbits2[5] = {
  1,3,3,3,3,
};

static const uint8_t huffcode3[7] = {
0x0,0x4,0x5,0xC,0xD,0xE,0xF,
};

static const uint8_t huffbits3[7] = {
  1,3,3,4,4,4,4,
};

static const uint8_t huffcode4[9] = {
  0x0,0x4,0x5,0xC,0xD,0x1C,0x1D,0x1E,0x1F,
};

static const uint8_t huffbits4[9] = {
  1,3,3,4,4,5,5,5,5,
};

static const uint8_t huffcode5[15] = {
  0x0,0x2,0x3,0x8,0x9,0xA,0xB,0x1C,0x1D,0x3C,0x3D,0x3E,0x3F,0xC,0xD,
};

static const uint8_t huffbits5[15] = {
  2,3,3,4,4,4,4,5,5,6,6,6,6,4,4
};

static const uint8_t huffcode6[31] = {
  0x0,0x2,0x3,0x4,0x5,0x6,0x7,0x14,0x15,0x16,0x17,0x18,0x19,0x34,0x35,
  0x36,0x37,0x38,0x39,0x3A,0x3B,0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F,0x8,0x9,
};

static const uint8_t huffbits6[31] = {
  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
};

static const uint8_t huffcode7[63] = {
  0x0,0x8,0x9,0xA,0xB,0xC,0xD,0xE,0xF,0x10,0x11,0x24,0x25,0x26,0x27,0x28,
  0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x68,0x69,0x6A,0x6B,0x6C,
  0x6D,0x6E,0x6F,0x70,0x71,0x72,0x73,0x74,0x75,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,
  0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,0x2,0x3,
};

static const uint8_t huffbits7[63] = {
  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,
  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
};

static const uint8_t huff_tab_sizes[7] = {
  9, 5, 7, 9, 15, 31, 63,
};

static const uint8_t* huff_codes[7] = {
  huffcode1,huffcode2,huffcode3,huffcode4,huffcode5,huffcode6,huffcode7,
};

static const uint8_t* huff_bits[7] = {
  huffbits1,huffbits2,huffbits3,huffbits4,huffbits5,huffbits6,huffbits7,
};

/* selector tables */

static const uint8_t CLCLengthTab[8] = {0, 4, 3, 3, 4, 4, 5, 6};
static const int8_t seTab_0[4] = {0, 1, -2, -1};
static const int8_t decTable1[18] = {0,0, 0,1, 0,-1, 1,0, -1,0, 1,1, 1,-1, -1,1, -1,-1};


/* tables for the scalefactor decoding */

static const float iMaxQuant[8] = {
  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
};

static const uint16_t subbandTab[33] = {
  0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224,
  256, 288, 320, 352, 384, 416, 448, 480, 512, 576, 640, 704, 768, 896, 1024
};

/* transform data */

static const float qmf_48tap_half[24] = {
   -0.00001461907, -0.00009205479, -0.000056157569, 0.00030117269,
    0.0002422519,-0.00085293897, -0.0005205574, 0.0020340169,
    0.00078333891, -0.0042153862, -0.00075614988, 0.0078402944,
   -0.000061169922, -0.01344162, 0.0024626821, 0.021736089,
   -0.007801671, -0.034090221, 0.01880949, 0.054326009,
   -0.043596379, -0.099384367, 0.13207909, 0.46424159
};

/* joint stereo related tables */
static const float matrixCoeffs[8] = {0.0, 2.0, 2.0, 2.0, 0.0, 0.0, 1.0, 1.0};