Commit | Line | Data |
---|---|---|
2ba45a60 DM |
1 | /* |
2 | * MPEG Audio common tables | |
3 | * copyright (c) 2002 Fabrice Bellard | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | /** | |
23 | * @file | |
24 | * mpeg audio layer common tables. | |
25 | */ | |
26 | ||
27 | #include "mpegaudiodata.h" | |
28 | ||
29 | ||
30 | const uint16_t avpriv_mpa_bitrate_tab[2][3][15] = { | |
31 | { {0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448 }, | |
32 | {0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384 }, | |
33 | {0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320 } }, | |
34 | { {0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256}, | |
35 | {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160}, | |
36 | {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160} | |
37 | } | |
38 | }; | |
39 | ||
40 | const uint16_t avpriv_mpa_freq_tab[3] = { 44100, 48000, 32000 }; | |
41 | ||
42 | /*******************************************************/ | |
43 | /* layer 2 tables */ | |
44 | ||
45 | const int ff_mpa_sblimit_table[5] = { 27 , 30 , 8, 12 , 30 }; | |
46 | ||
47 | const int ff_mpa_quant_steps[17] = { | |
48 | 3, 5, 7, 9, 15, | |
49 | 31, 63, 127, 255, 511, | |
50 | 1023, 2047, 4095, 8191, 16383, | |
51 | 32767, 65535 | |
52 | }; | |
53 | ||
54 | /* we use a negative value if grouped */ | |
55 | const int ff_mpa_quant_bits[17] = { | |
56 | -5, -7, 3, -10, 4, | |
57 | 5, 6, 7, 8, 9, | |
58 | 10, 11, 12, 13, 14, | |
59 | 15, 16 | |
60 | }; | |
61 | ||
62 | /* encoding tables which give the quantization index. Note how it is | |
63 | possible to store them efficiently ! */ | |
64 | static const unsigned char alloc_table_1[] = { | |
65 | 4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, | |
66 | 4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, | |
67 | 4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, | |
68 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, | |
69 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, | |
70 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, | |
71 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, | |
72 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, | |
73 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, | |
74 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, | |
75 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, | |
76 | 3, 0, 1, 2, 3, 4, 5, 16, | |
77 | 3, 0, 1, 2, 3, 4, 5, 16, | |
78 | 3, 0, 1, 2, 3, 4, 5, 16, | |
79 | 3, 0, 1, 2, 3, 4, 5, 16, | |
80 | 3, 0, 1, 2, 3, 4, 5, 16, | |
81 | 3, 0, 1, 2, 3, 4, 5, 16, | |
82 | 3, 0, 1, 2, 3, 4, 5, 16, | |
83 | 3, 0, 1, 2, 3, 4, 5, 16, | |
84 | 3, 0, 1, 2, 3, 4, 5, 16, | |
85 | 3, 0, 1, 2, 3, 4, 5, 16, | |
86 | 3, 0, 1, 2, 3, 4, 5, 16, | |
87 | 3, 0, 1, 2, 3, 4, 5, 16, | |
88 | 2, 0, 1, 16, | |
89 | 2, 0, 1, 16, | |
90 | 2, 0, 1, 16, | |
91 | 2, 0, 1, 16, | |
92 | 2, 0, 1, 16, | |
93 | 2, 0, 1, 16, | |
94 | 2, 0, 1, 16, | |
95 | }; | |
96 | ||
97 | static const unsigned char alloc_table_3[] = { | |
98 | 4, 0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, | |
99 | 4, 0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, | |
100 | 3, 0, 1, 3, 4, 5, 6, 7, | |
101 | 3, 0, 1, 3, 4, 5, 6, 7, | |
102 | 3, 0, 1, 3, 4, 5, 6, 7, | |
103 | 3, 0, 1, 3, 4, 5, 6, 7, | |
104 | 3, 0, 1, 3, 4, 5, 6, 7, | |
105 | 3, 0, 1, 3, 4, 5, 6, 7, | |
106 | 3, 0, 1, 3, 4, 5, 6, 7, | |
107 | 3, 0, 1, 3, 4, 5, 6, 7, | |
108 | 3, 0, 1, 3, 4, 5, 6, 7, | |
109 | 3, 0, 1, 3, 4, 5, 6, 7, | |
110 | }; | |
111 | ||
112 | static const unsigned char alloc_table_4[] = { | |
113 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, | |
114 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, | |
115 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, | |
116 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, | |
117 | 3, 0, 1, 3, 4, 5, 6, 7, | |
118 | 3, 0, 1, 3, 4, 5, 6, 7, | |
119 | 3, 0, 1, 3, 4, 5, 6, 7, | |
120 | 3, 0, 1, 3, 4, 5, 6, 7, | |
121 | 3, 0, 1, 3, 4, 5, 6, 7, | |
122 | 3, 0, 1, 3, 4, 5, 6, 7, | |
123 | 3, 0, 1, 3, 4, 5, 6, 7, | |
124 | 2, 0, 1, 3, | |
125 | 2, 0, 1, 3, | |
126 | 2, 0, 1, 3, | |
127 | 2, 0, 1, 3, | |
128 | 2, 0, 1, 3, | |
129 | 2, 0, 1, 3, | |
130 | 2, 0, 1, 3, | |
131 | 2, 0, 1, 3, | |
132 | 2, 0, 1, 3, | |
133 | 2, 0, 1, 3, | |
134 | 2, 0, 1, 3, | |
135 | 2, 0, 1, 3, | |
136 | 2, 0, 1, 3, | |
137 | 2, 0, 1, 3, | |
138 | 2, 0, 1, 3, | |
139 | 2, 0, 1, 3, | |
140 | 2, 0, 1, 3, | |
141 | 2, 0, 1, 3, | |
142 | 2, 0, 1, 3, | |
143 | }; | |
144 | ||
145 | const unsigned char * const ff_mpa_alloc_tables[5] = | |
146 | { alloc_table_1, alloc_table_1, alloc_table_3, alloc_table_3, alloc_table_4, }; |