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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 huffcode1[9] = { | |
36 | 0x0, 0x4, 0x5, 0xC, 0xD, 0x1C, 0x1D, 0x1E, 0x1F | |
37 | }; | |
38 | ||
39 | static const uint8_t huffbits1[9] = { 1, 3, 3, 4, 4, 5, 5, 5, 5 }; | |
40 | ||
41 | static const uint8_t huffcode2[5] = { 0x0, 0x4, 0x5, 0x6, 0x7 }; | |
42 | ||
43 | static const uint8_t huffbits2[5] = { 1, 3, 3, 3, 3 }; | |
44 | ||
45 | static const uint8_t huffcode3[7] = { 0x0, 0x4, 0x5, 0xC, 0xD, 0xE, 0xF }; | |
46 | ||
47 | static const uint8_t huffbits3[7] = { 1, 3, 3, 4, 4, 4, 4 }; | |
48 | ||
49 | static const uint8_t huffcode4[9] = { | |
50 | 0x0, 0x4, 0x5, 0xC, 0xD, 0x1C, 0x1D, 0x1E, 0x1F | |
51 | }; | |
52 | ||
53 | static const uint8_t huffbits4[9] = { 1, 3, 3, 4, 4, 5, 5, 5, 5 }; | |
54 | ||
55 | static const uint8_t huffcode5[15] = { | |
56 | 0x00, 0x02, 0x03, 0x08, 0x09, 0x0A, 0x0B, 0x1C, | |
57 | 0x1D, 0x3C, 0x3D, 0x3E, 0x3F, 0x0C, 0x0D | |
58 | }; | |
59 | ||
60 | static const uint8_t huffbits5[15] = { | |
61 | 2, 3, 3, 4, 4, 4, 4, 5, 5, 6, 6, 6, 6, 4, 4 | |
62 | }; | |
63 | ||
64 | static const uint8_t huffcode6[31] = { | |
65 | 0x00, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x14, | |
66 | 0x15, 0x16, 0x17, 0x18, 0x19, 0x34, 0x35, 0x36, | |
67 | 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x78, 0x79, 0x7A, | |
68 | 0x7B, 0x7C, 0x7D, 0x7E, 0x7F, 0x08, 0x09 | |
69 | }; | |
70 | ||
71 | static const uint8_t huffbits6[31] = { | |
72 | 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, | |
73 | 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4 | |
74 | }; | |
75 | ||
76 | static const uint8_t huffcode7[63] = { | |
77 | 0x00, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, | |
78 | 0x0F, 0x10, 0x11, 0x24, 0x25, 0x26, 0x27, 0x28, | |
79 | 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30, | |
80 | 0x31, 0x32, 0x33, 0x68, 0x69, 0x6A, 0x6B, 0x6C, | |
81 | 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, | |
82 | 0x75, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, | |
83 | 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, | |
84 | 0xFB, 0xFC, 0xFD, 0xFE, 0xFF, 0x02, 0x03 | |
85 | }; | |
86 | ||
87 | static const uint8_t huffbits7[63] = { | |
88 | 3, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, | |
89 | 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, | |
90 | 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, | |
91 | 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4 | |
92 | }; | |
93 | ||
94 | static const uint8_t huff_tab_sizes[7] = { | |
95 | 9, 5, 7, 9, 15, 31, 63, | |
96 | }; | |
97 | ||
98 | static const uint8_t* const huff_codes[7] = { | |
99 | huffcode1, huffcode2, huffcode3, huffcode4, huffcode5, huffcode6, huffcode7 | |
100 | }; | |
101 | ||
102 | static const uint8_t* const huff_bits[7] = { | |
103 | huffbits1, huffbits2, huffbits3, huffbits4, huffbits5, huffbits6, huffbits7, | |
104 | }; | |
105 | ||
106 | static const uint16_t atrac3_vlc_offs[9] = { | |
107 | 0, 512, 1024, 1536, 2048, 2560, 3072, 3584, 4096 | |
108 | }; | |
109 | ||
110 | /* selector tables */ | |
111 | ||
112 | static const uint8_t clc_length_tab[8] = { 0, 4, 3, 3, 4, 4, 5, 6 }; | |
113 | ||
114 | static const int8_t mantissa_clc_tab[4] = { 0, 1, -2, -1 }; | |
115 | ||
116 | static const int8_t mantissa_vlc_tab[18] = { | |
117 | 0, 0, 0, 1, 0, -1, 1, 0, -1, 0, 1, 1, 1, -1, -1, 1, -1, -1 | |
118 | }; | |
119 | ||
120 | ||
121 | /* tables for the scalefactor decoding */ | |
122 | ||
123 | static const float inv_max_quant[8] = { | |
124 | 0.0, 1.0 / 1.5, 1.0 / 2.5, 1.0 / 3.5, | |
125 | 1.0 / 4.5, 1.0 / 7.5, 1.0 / 15.5, 1.0 / 31.5 | |
126 | }; | |
127 | ||
128 | static const uint16_t subband_tab[33] = { | |
129 | 0, 8, 16, 24, 32, 40, 48, 56, | |
130 | 64, 80, 96, 112, 128, 144, 160, 176, | |
131 | 192, 224, 256, 288, 320, 352, 384, 416, | |
132 | 448, 480, 512, 576, 640, 704, 768, 896, | |
133 | 1024 | |
134 | }; | |
135 | ||
136 | /* joint stereo related tables */ | |
137 | static const float matrix_coeffs[8] = { | |
138 | 0.0, 2.0, 2.0, 2.0, 0.0, 0.0, 1.0, 1.0 | |
139 | }; | |
140 | ||
141 | #endif /* AVCODEC_ATRAC3DATA_H */ |