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 /* selector tables */
 109
 110 static const uint8_t CLCLengthTab[8] = {0, 4, 3, 3, 4, 4, 5, 6};
 111 static const int8_t seTab_0[4] = {0, 1, -2, -1};
 112 static const int8_t decTable1[18] = {0,0, 0,1, 0,-1, 1,0, -1,0, 1,1, 1,-1, -1,1, -1,-1};
 113
 114
 115 /* tables for the scalefactor decoding */
 116
 117 static const float iMaxQuant[8] = {
 118   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
 119 };
 120
 121 static const uint16_t subbandTab[33] = {
 122   0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224,
 123   256, 288, 320, 352, 384, 416, 448, 480, 512, 576, 640, 704, 768, 896, 1024
 124 };
 125
 126 /* transform data */
 127
 128 static const float qmf_48tap_half[24] = {
 129    -0.00001461907, -0.00009205479, -0.000056157569, 0.00030117269,
 130     0.0002422519,-0.00085293897, -0.0005205574, 0.0020340169,
 131     0.00078333891, -0.0042153862, -0.00075614988, 0.0078402944,
 132    -0.000061169922, -0.01344162, 0.0024626821, 0.021736089,
 133    -0.007801671, -0.034090221, 0.01880949, 0.054326009,
 134    -0.043596379, -0.099384367, 0.13207909, 0.46424159
 135 };
 136
 137 /* joint stereo related tables */
 138 static const float matrixCoeffs[8] = {0.0, 2.0, 2.0, 2.0, 0.0, 0.0, 1.0, 1.0};
 139
 140 #endif /* AVCODEC_ATRAC3DATA_H */