Atrac3 decoder.
[libav.git] / libavcodec / atrac3data.h
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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
30static const uint8_t huffcode1[9] = {
31 0x0,0x4,0x5,0xC,0xD,0x1C,0x1D,0x1E,0x1F,
32};
33
34static const uint8_t huffbits1[9] = {
35 1,3,3,4,4,5,5,5,5,
36};
37
38static const uint8_t huffcode2[5] = {
39 0x0,0x4,0x5,0x6,0x7,
40};
41
42static const uint8_t huffbits2[5] = {
43 1,3,3,3,3,
44};
45
46static const uint8_t huffcode3[7] = {
470x0,0x4,0x5,0xC,0xD,0xE,0xF,
48};
49
50static const uint8_t huffbits3[7] = {
51 1,3,3,4,4,4,4,
52};
53
54static const uint8_t huffcode4[9] = {
55 0x0,0x4,0x5,0xC,0xD,0x1C,0x1D,0x1E,0x1F,
56};
57
58static const uint8_t huffbits4[9] = {
59 1,3,3,4,4,5,5,5,5,
60};
61
62static const uint8_t huffcode5[15] = {
63 0x0,0x2,0x3,0x8,0x9,0xA,0xB,0x1C,0x1D,0x3C,0x3D,0x3E,0x3F,0xC,0xD,
64};
65
66static const uint8_t huffbits5[15] = {
67 2,3,3,4,4,4,4,5,5,6,6,6,6,4,4
68};
69
70static 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
75static 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
79static 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
86static 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
91static const uint8_t huff_tab_sizes[7] = {
92 9, 5, 7, 9, 15, 31, 63,
93};
94
95static const uint8_t* huff_codes[7] = {
96 huffcode1,huffcode2,huffcode3,huffcode4,huffcode5,huffcode6,huffcode7,
97};
98
99static const uint8_t* huff_bits[7] = {
100 huffbits1,huffbits2,huffbits3,huffbits4,huffbits5,huffbits6,huffbits7,
101};
102
103/* selector tables */
104
105static const uint8_t CLCLengthTab[8] = {0, 4, 3, 3, 4, 4, 5, 6};
106static const int8_t seTab_0[4] = {0, 1, -2, -1};
107static 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
112static 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
116static 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
123static 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 */
133static const float matrixCoeffs[8] = {0.0, 2.0, 2.0, 2.0, 0.0, 0.0, 1.0, 1.0};