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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, }; |
147 |