1 /*
2 * mpeg audio layer 2 tables. Most of them come from the mpeg audio
3 * specification.
4 *
5 * Copyright (c) 2000, 2001 Fabrice Bellard
6 *
7 * This file is part of FFmpeg.
8 *
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 /**
25 * @file
26 * mpeg audio layer 2 tables.
27 * Most of them come from the mpeg audio specification.
28 */
29
30 #ifndef AVCODEC_MPEGAUDIOTAB_H
31 #define AVCODEC_MPEGAUDIOTAB_H
32
33 #include <stdint.h>
35
36 #define SQRT2 1.41421356237309514547
37
39 FIX(0.54119610014619701222),
40 FIX(1.3065629648763763537),
41
42 FIX(0.50979557910415917998),
43 FIX(2.5629154477415054814),
44 FIX(0.89997622313641556513),
45 FIX(0.60134488693504528634),
46
47 FIX(0.5024192861881556782),
48 FIX(5.1011486186891552563),
49 FIX(0.78815462345125020249),
50 FIX(0.64682178335999007679),
51 FIX(0.56694403481635768927),
52 FIX(1.0606776859903470633),
53 FIX(1.7224470982383341955),
54 FIX(0.52249861493968885462),
55
56 FIX(10.19000812354803287),
57 FIX(0.674808341455005678),
58 FIX(1.1694399334328846596),
59 FIX(0.53104259108978413284),
60 FIX(2.0577810099534108446),
61 FIX(0.58293496820613388554),
62 FIX(0.83934964541552681272),
63 FIX(0.50547095989754364798),
64 FIX(3.4076084184687189804),
65 FIX(0.62250412303566482475),
66 FIX(0.97256823786196078263),
67 FIX(0.51544730992262455249),
68 FIX(1.4841646163141661852),
69 FIX(0.5531038960344445421),
70 FIX(0.74453627100229857749),
71 FIX(0.5006029982351962726),
72 };
73
75 0, 16, 8, 24, 4, 20, 12, 28,
76 2, 18, 10, 26, 6, 22, 14, 30,
77 1, 17, 9, 25, 5, 21, 13, 29,
78 3, 19, 11, 27, 7, 23, 15, 31
79 };
80
81
82 /* signal to noise ratio of each quantification step (could be
83 computed from quant_steps[]). The values are dB multiplied by 10
84 */
86 70, 110, 160, 208,
87 253, 316, 378, 439,
88 499, 559, 620, 680,
89 740, 800, 861, 920,
90 980
91 };
92
93 /* fixed psycho acoustic model. Values of SNR taken from the 'toolame'
94 project */
96 30, 17, 16, 10, 3, 12, 8, 2.5,
97 5, 5, 6, 6, 5, 6, 10, 6,
98 -4, -10, -21, -30, -42, -55, -68, -75,
99 -75, -75, -75, -75, -91, -107, -110, -108
100 };
101
103
104 #endif /* AVCODEC_MPEGAUDIOTAB_H */