libavcodec/atrac3data.h

   1 /*
   2  * Atrac 3 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 libavcodec/atrac3data.h
  25  * Atrac 3 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] = {
  40   1,3,3,4,4,5,5,5,5,
  41 };
  42
  43 static const uint8_t huffcode2[5] = {
  44   0x0,0x4,0x5,0x6,0x7,
  45 };
  46
  47 static const uint8_t huffbits2[5] = {
  48   1,3,3,3,3,
  49 };
  50
  51 static const uint8_t huffcode3[7] = {
  52 0x0,0x4,0x5,0xC,0xD,0xE,0xF,
  53 };
  54
  55 static const uint8_t huffbits3[7] = {
  56   1,3,3,4,4,4,4,
  57 };
  58
  59 static const uint8_t huffcode4[9] = {
  60   0x0,0x4,0x5,0xC,0xD,0x1C,0x1D,0x1E,0x1F,
  61 };
  62
  63 static const uint8_t huffbits4[9] = {
  64   1,3,3,4,4,5,5,5,5,
  65 };
  66
  67 static const uint8_t huffcode5[15] = {
  68   0x0,0x2,0x3,0x8,0x9,0xA,0xB,0x1C,0x1D,0x3C,0x3D,0x3E,0x3F,0xC,0xD,
  69 };
  70
  71 static const uint8_t huffbits5[15] = {
  72   2,3,3,4,4,4,4,5,5,6,6,6,6,4,4
  73 };
  74
  75 static const uint8_t huffcode6[31] = {
  76   0x0,0x2,0x3,0x4,0x5,0x6,0x7,0x14,0x15,0x16,0x17,0x18,0x19,0x34,0x35,
  77   0x36,0x37,0x38,0x39,0x3A,0x3B,0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F,0x8,0x9,
  78 };
  79
  80 static const uint8_t huffbits6[31] = {
  81   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
  82 };
  83
  84 static const uint8_t huffcode7[63] = {
  85   0x0,0x8,0x9,0xA,0xB,0xC,0xD,0xE,0xF,0x10,0x11,0x24,0x25,0x26,0x27,0x28,
  86   0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x68,0x69,0x6A,0x6B,0x6C,
  87   0x6D,0x6E,0x6F,0x70,0x71,0x72,0x73,0x74,0x75,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,
  88   0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,0x2,0x3,
  89 };
  90
  91 static const uint8_t huffbits7[63] = {
  92   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,
  93   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
  94 };
  95
  96 static const uint8_t huff_tab_sizes[7] = {
  97   9, 5, 7, 9, 15, 31, 63,
  98 };
  99
 100 static const uint8_t* const huff_codes[7] = {
 101   huffcode1,huffcode2,huffcode3,huffcode4,huffcode5,huffcode6,huffcode7,
 102 };
 103
 104 static const uint8_t* const huff_bits[7] = {
 105   huffbits1,huffbits2,huffbits3,huffbits4,huffbits5,huffbits6,huffbits7,
 106 };
 107
 108 static const uint16_t atrac3_vlc_offs[] = {
 109     0,512,1024,1536,2048,2560,3072,3584,4096
 110 };
 111
 112 /* selector tables */
 113
 114 static const uint8_t CLCLengthTab[8] = {0, 4, 3, 3, 4, 4, 5, 6};
 115 static const int8_t seTab_0[4] = {0, 1, -2, -1};
 116 static const int8_t decTable1[18] = {0,0, 0,1, 0,-1, 1,0, -1,0, 1,1, 1,-1, -1,1, -1,-1};
 117
 118
 119 /* tables for the scalefactor decoding */
 120
 121 static const float iMaxQuant[8] = {
 122   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
 123 };
 124
 125 static const uint16_t subbandTab[33] = {
 126   0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224,
 127   256, 288, 320, 352, 384, 416, 448, 480, 512, 576, 640, 704, 768, 896, 1024
 128 };
 129
 130 /* transform data */
 131
 132 static const float qmf_48tap_half[24] = {
 133    -0.00001461907, -0.00009205479, -0.000056157569, 0.00030117269,
 134     0.0002422519,-0.00085293897, -0.0005205574, 0.0020340169,
 135     0.00078333891, -0.0042153862, -0.00075614988, 0.0078402944,
 136    -0.000061169922, -0.01344162, 0.0024626821, 0.021736089,
 137    -0.007801671, -0.034090221, 0.01880949, 0.054326009,
 138    -0.043596379, -0.099384367, 0.13207909, 0.46424159
 139 };
 140
 141 /* joint stereo related tables */
 142 static const float matrixCoeffs[8] = {0.0, 2.0, 2.0, 2.0, 0.0, 0.0, 1.0, 1.0};
 143
 144 #endif /* AVCODEC_ATRAC3DATA_H */