FFmpeg
atrac3data.h
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1 /*
2  * ATRAC3 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  * ATRAC3 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 atrac3_hufftabs[][2] = {
36  /* Spectral coefficient 1 - 9 entries */
37  { 31, 1 }, { 32, 3 }, { 33, 3 }, { 34, 4 }, { 35, 4 },
38  { 36, 5 }, { 37, 5 }, { 38, 5 }, { 39, 5 },
39  /* Spectral coefficient 2 - 5 entries */
40  { 31, 1 }, { 32, 3 }, { 30, 3 }, { 33, 3 }, { 29, 3 },
41  /* Spectral coefficient 3 - 7 entries */
42  { 31, 1 }, { 32, 3 }, { 30, 3 }, { 33, 4 },
43  { 29, 4 }, { 34, 4 }, { 28, 4 },
44  /* Spectral coefficient 4 - 9 entries */
45  { 31, 1 }, { 32, 3 }, { 30, 3 }, { 33, 4 }, { 29, 4 },
46  { 34, 5 }, { 28, 5 }, { 35, 5 }, { 27, 5 },
47  /* Spectral coefficient 5 - 15 entries */
48  { 31, 2 }, { 32, 3 }, { 30, 3 }, { 33, 4 }, { 29, 4 },
49  { 34, 4 }, { 28, 4 }, { 38, 4 }, { 24, 4 }, { 35, 5 },
50  { 27, 5 }, { 36, 6 }, { 26, 6 }, { 37, 6 }, { 25, 6 },
51  /* Spectral coefficient 6 - 31 entries */
52  { 31, 3 }, { 32, 4 }, { 30, 4 }, { 33, 4 }, { 29, 4 }, { 34, 4 },
53  { 28, 4 }, { 46, 4 }, { 16, 4 }, { 35, 5 }, { 27, 5 }, { 36, 5 },
54  { 26, 5 }, { 37, 5 }, { 25, 5 }, { 38, 6 }, { 24, 6 }, { 39, 6 },
55  { 23, 6 }, { 40, 6 }, { 22, 6 }, { 41, 6 }, { 21, 6 }, { 42, 7 },
56  { 20, 7 }, { 43, 7 }, { 19, 7 }, { 44, 7 }, { 18, 7 }, { 45, 7 },
57  { 17, 7 },
58  /* Spectral coefficient 7 - 63 entries */
59  { 31, 3 }, { 62, 4 }, { 0, 4 }, { 32, 5 }, { 30, 5 }, { 33, 5 },
60  { 29, 5 }, { 34, 5 }, { 28, 5 }, { 35, 5 }, { 27, 5 }, { 36, 5 },
61  { 26, 5 }, { 37, 6 }, { 25, 6 }, { 38, 6 }, { 24, 6 }, { 39, 6 },
62  { 23, 6 }, { 40, 6 }, { 22, 6 }, { 41, 6 }, { 21, 6 }, { 42, 6 },
63  { 20, 6 }, { 43, 6 }, { 19, 6 }, { 44, 6 }, { 18, 6 }, { 45, 7 },
64  { 17, 7 }, { 46, 7 }, { 16, 7 }, { 47, 7 }, { 15, 7 }, { 48, 7 },
65  { 14, 7 }, { 49, 7 }, { 13, 7 }, { 50, 7 }, { 12, 7 }, { 51, 7 },
66  { 11, 7 }, { 52, 8 }, { 10, 8 }, { 53, 8 }, { 9, 8 }, { 54, 8 },
67  { 8, 8 }, { 55, 8 }, { 7, 8 }, { 56, 8 }, { 6, 8 }, { 57, 8 },
68  { 5, 8 }, { 58, 8 }, { 4, 8 }, { 59, 8 }, { 3, 8 }, { 60, 8 },
69  { 2, 8 }, { 61, 8 }, { 1, 8 },
70 };
71 
72 static const uint8_t huff_tab_sizes[7] = {
73  9, 5, 7, 9, 15, 31, 63,
74 };
75 
76 /* selector tables */
77 
78 static const uint8_t clc_length_tab[8] = { 0, 4, 3, 3, 4, 4, 5, 6 };
79 
80 static const int8_t mantissa_clc_tab[4] = { 0, 1, -2, -1 };
81 
82 static const int8_t mantissa_vlc_tab[18] = {
83  0, 0, 0, 1, 0, -1, 1, 0, -1, 0, 1, 1, 1, -1, -1, 1, -1, -1
84 };
85 
86 
87 /* tables for the scalefactor decoding */
88 
89 static const float inv_max_quant[8] = {
90  0.0, 1.0 / 1.5, 1.0 / 2.5, 1.0 / 3.5,
91  1.0 / 4.5, 1.0 / 7.5, 1.0 / 15.5, 1.0 / 31.5
92 };
93 
94 static const uint16_t subband_tab[33] = {
95  0, 8, 16, 24, 32, 40, 48, 56,
96  64, 80, 96, 112, 128, 144, 160, 176,
97  192, 224, 256, 288, 320, 352, 384, 416,
98  448, 480, 512, 576, 640, 704, 768, 896,
99  1024
100 };
101 
102 /* joint stereo related tables */
103 static const float matrix_coeffs[8] = {
104  0.0, 2.0, 2.0, 2.0, 0.0, 0.0, 1.0, 1.0
105 };
106 
107 #endif /* AVCODEC_ATRAC3DATA_H */
static const uint8_t clc_length_tab[8]
Definition: atrac3data.h:78
uint8_t
static const int8_t mantissa_clc_tab[4]
Definition: atrac3data.h:80
static const float inv_max_quant[8]
Definition: atrac3data.h:89
static const uint16_t subband_tab[33]
Definition: atrac3data.h:94
static const int8_t mantissa_vlc_tab[18]
Definition: atrac3data.h:82
static const float matrix_coeffs[8]
Definition: atrac3data.h:103
static const uint8_t huff_tab_sizes[7]
Definition: atrac3data.h:72
static const uint8_t atrac3_hufftabs[][2]
Definition: atrac3data.h:35