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
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
35static const uint8_t huffcode1[9] = {
36  0x0,0x4,0x5,0xC,0xD,0x1C,0x1D,0x1E,0x1F,
37};
38
39static const uint8_t huffbits1[9] = {
40  1,3,3,4,4,5,5,5,5,
41};
42
43static const uint8_t huffcode2[5] = {
44  0x0,0x4,0x5,0x6,0x7,
45};
46
47static const uint8_t huffbits2[5] = {
48  1,3,3,3,3,
49};
50
51static const uint8_t huffcode3[7] = {
520x0,0x4,0x5,0xC,0xD,0xE,0xF,
53};
54
55static const uint8_t huffbits3[7] = {
56  1,3,3,4,4,4,4,
57};
58
59static const uint8_t huffcode4[9] = {
60  0x0,0x4,0x5,0xC,0xD,0x1C,0x1D,0x1E,0x1F,
61};
62
63static const uint8_t huffbits4[9] = {
64  1,3,3,4,4,5,5,5,5,
65};
66
67static const uint8_t huffcode5[15] = {
68  0x0,0x2,0x3,0x8,0x9,0xA,0xB,0x1C,0x1D,0x3C,0x3D,0x3E,0x3F,0xC,0xD,
69};
70
71static const uint8_t huffbits5[15] = {
72  2,3,3,4,4,4,4,5,5,6,6,6,6,4,4
73};
74
75static 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
80static 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
84static 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
91static 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
96static const uint8_t huff_tab_sizes[7] = {
97  9, 5, 7, 9, 15, 31, 63,
98};
99
100static const uint8_t* const huff_codes[7] = {
101  huffcode1,huffcode2,huffcode3,huffcode4,huffcode5,huffcode6,huffcode7,
102};
103
104static const uint8_t* const huff_bits[7] = {
105  huffbits1,huffbits2,huffbits3,huffbits4,huffbits5,huffbits6,huffbits7,
106};
107
108static const uint16_t atrac3_vlc_offs[] = {
109    0,512,1024,1536,2048,2560,3072,3584,4096
110};
111
112/* selector tables */
113
114static const uint8_t CLCLengthTab[8] = {0, 4, 3, 3, 4, 4, 5, 6};
115static const int8_t seTab_0[4] = {0, 1, -2, -1};
116static 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
121static 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
125static 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/* joint stereo related tables */
131static const float matrixCoeffs[8] = {0.0, 2.0, 2.0, 2.0, 0.0, 0.0, 1.0, 1.0};
132
133#endif /* AVCODEC_ATRAC3DATA_H */
134