Atrac3 decoder.
[ffmpeg.git] / 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 atrac3data.h
25  * Atrac 3 AKA RealAudio 8 compatible decoder data
26  */
27
28 /* VLC tables */
29
30 static const uint8_t huffcode1[9] = {
31   0x0,0x4,0x5,0xC,0xD,0x1C,0x1D,0x1E,0x1F,
32 };
33
34 static const uint8_t huffbits1[9] = {
35   1,3,3,4,4,5,5,5,5,
36 };
37
38 static const uint8_t huffcode2[5] = {
39   0x0,0x4,0x5,0x6,0x7,
40 };
41
42 static const uint8_t huffbits2[5] = {
43   1,3,3,3,3,
44 };
45
46 static const uint8_t huffcode3[7] = {
47 0x0,0x4,0x5,0xC,0xD,0xE,0xF,
48 };
49
50 static const uint8_t huffbits3[7] = {
51   1,3,3,4,4,4,4,
52 };
53
54 static const uint8_t huffcode4[9] = {
55   0x0,0x4,0x5,0xC,0xD,0x1C,0x1D,0x1E,0x1F,
56 };
57
58 static const uint8_t huffbits4[9] = {
59   1,3,3,4,4,5,5,5,5,
60 };
61
62 static const uint8_t huffcode5[15] = {
63   0x0,0x2,0x3,0x8,0x9,0xA,0xB,0x1C,0x1D,0x3C,0x3D,0x3E,0x3F,0xC,0xD,
64 };
65
66 static const uint8_t huffbits5[15] = {
67   2,3,3,4,4,4,4,5,5,6,6,6,6,4,4
68 };
69
70 static const uint8_t huffcode6[31] = {
71   0x0,0x2,0x3,0x4,0x5,0x6,0x7,0x14,0x15,0x16,0x17,0x18,0x19,0x34,0x35,
72   0x36,0x37,0x38,0x39,0x3A,0x3B,0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F,0x8,0x9,
73 };
74
75 static const uint8_t huffbits6[31] = {
76   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
77 };
78
79 static const uint8_t huffcode7[63] = {
80   0x0,0x8,0x9,0xA,0xB,0xC,0xD,0xE,0xF,0x10,0x11,0x24,0x25,0x26,0x27,0x28,
81   0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x68,0x69,0x6A,0x6B,0x6C,
82   0x6D,0x6E,0x6F,0x70,0x71,0x72,0x73,0x74,0x75,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,
83   0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,0x2,0x3,
84 };
85
86 static const uint8_t huffbits7[63] = {
87   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,
88   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
89 };
90
91 static const uint8_t huff_tab_sizes[7] = {
92   9, 5, 7, 9, 15, 31, 63,
93 };
94
95 static const uint8_t* huff_codes[7] = {
96   huffcode1,huffcode2,huffcode3,huffcode4,huffcode5,huffcode6,huffcode7,
97 };
98
99 static const uint8_t* huff_bits[7] = {
100   huffbits1,huffbits2,huffbits3,huffbits4,huffbits5,huffbits6,huffbits7,
101 };
102
103 /* selector tables */
104
105 static const uint8_t CLCLengthTab[8] = {0, 4, 3, 3, 4, 4, 5, 6};
106 static const int8_t seTab_0[4] = {0, 1, -2, -1};
107 static const int8_t decTable1[18] = {0,0, 0,1, 0,-1, 1,0, -1,0, 1,1, 1,-1, -1,1, -1,-1};
108
109
110 /* tables for the scalefactor decoding */
111
112 static const float iMaxQuant[8] = {
113   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
114 };
115
116 static const uint16_t subbandTab[33] = {
117   0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224,
118   256, 288, 320, 352, 384, 416, 448, 480, 512, 576, 640, 704, 768, 896, 1024
119 };
120
121 /* transform data */
122
123 static const float qmf_48tap_half[24] = {
124    -0.00001461907, -0.00009205479, -0.000056157569, 0.00030117269,
125     0.0002422519,-0.00085293897, -0.0005205574, 0.0020340169,
126     0.00078333891, -0.0042153862, -0.00075614988, 0.0078402944,
127    -0.000061169922, -0.01344162, 0.0024626821, 0.021736089,
128    -0.007801671, -0.034090221, 0.01880949, 0.054326009,
129    -0.043596379, -0.099384367, 0.13207909, 0.46424159
130 };
131
132 /* joint stereo related tables */
133 static const float matrixCoeffs[8] = {0.0, 2.0, 2.0, 2.0, 0.0, 0.0, 1.0, 1.0};