Statistics
| Branch: | Revision:

ffmpeg / libavcodec / aacdectab.h @ 2912e87a

History | View | Annotate | Download (3.19 KB)

1
/*
2
 * AAC decoder data
3
 * Copyright (c) 2005-2006 Oded Shimon ( ods15 ods15 dyndns org )
4
 * Copyright (c) 2006-2007 Maxim Gavrilov ( maxim.gavrilov gmail com )
5
 *
6
 * This file is part of Libav.
7
 *
8
 * Libav 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
 * Libav 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 Libav; 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
 * AAC decoder data
26
 * @author Oded Shimon  ( ods15 ods15 dyndns org )
27
 * @author Maxim Gavrilov ( maxim.gavrilov gmail com )
28
 */
29

    
30
#ifndef AVCODEC_AACDECTAB_H
31
#define AVCODEC_AACDECTAB_H
32

    
33
#include "libavutil/audioconvert.h"
34
#include "aac.h"
35

    
36
#include <stdint.h>
37

    
38
/* @name ltp_coef
39
 * Table of the LTP coefficient (multiplied by 2)
40
 */
41
static const float ltp_coef[8] = {
42
     1.141658,    1.393232,    1.626008,    1.822608,
43
     1.969800,    2.135788,    2.2389202,   2.739066,
44
};
45

    
46
/* @name tns_tmp2_map
47
 * Tables of the tmp2[] arrays of LPC coefficients used for TNS.
48
 * The suffix _M_N[] indicate the values of coef_compress and coef_res
49
 * respectively.
50
 * @{
51
 */
52
static const float tns_tmp2_map_1_3[4] = {
53
     0.00000000, -0.43388373,  0.64278758,  0.34202015,
54
};
55

    
56
static const float tns_tmp2_map_0_3[8] = {
57
     0.00000000, -0.43388373, -0.78183150, -0.97492790,
58
     0.98480773,  0.86602539,  0.64278758,  0.34202015,
59
};
60

    
61
static const float tns_tmp2_map_1_4[8] = {
62
     0.00000000, -0.20791170, -0.40673664, -0.58778524,
63
     0.67369562,  0.52643216,  0.36124167,  0.18374951,
64
};
65

    
66
static const float tns_tmp2_map_0_4[16] = {
67
     0.00000000, -0.20791170, -0.40673664, -0.58778524,
68
    -0.74314481, -0.86602539, -0.95105654, -0.99452192,
69
     0.99573416,  0.96182561,  0.89516330,  0.79801720,
70
     0.67369562,  0.52643216,  0.36124167,  0.18374951,
71
};
72

    
73
static const float * const tns_tmp2_map[4] = {
74
    tns_tmp2_map_0_3,
75
    tns_tmp2_map_0_4,
76
    tns_tmp2_map_1_3,
77
    tns_tmp2_map_1_4
78
};
79
// @}
80

    
81
static const int8_t tags_per_config[16] = { 0, 1, 1, 2, 3, 3, 4, 5, 0, 0, 0, 0, 0, 0, 0, 0 };
82

    
83
static const uint8_t aac_channel_layout_map[7][5][2] = {
84
    { { TYPE_SCE, 0 }, },
85
    { { TYPE_CPE, 0 }, },
86
    { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, },
87
    { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_SCE, 1 }, },
88
    { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_CPE, 1 }, },
89
    { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_LFE, 0 }, { TYPE_CPE, 1 }, },
90
    { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_LFE, 0 }, { TYPE_CPE, 2 }, { TYPE_CPE, 1 }, },
91
};
92

    
93
static const int64_t aac_channel_layout[8] = {
94
    AV_CH_LAYOUT_MONO,
95
    AV_CH_LAYOUT_STEREO,
96
    AV_CH_LAYOUT_SURROUND,
97
    AV_CH_LAYOUT_4POINT0,
98
    AV_CH_LAYOUT_5POINT0_BACK,
99
    AV_CH_LAYOUT_5POINT1_BACK,
100
    AV_CH_LAYOUT_7POINT1_WIDE,
101
    0,
102
};
103

    
104
#endif /* AVCODEC_AACDECTAB_H */