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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 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 | * 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/channel_layout.h" | |
34 | #include "aac.h" | |
35 | ||
36 | #include <stdint.h> | |
37 | ||
38 | /* @name ltp_coef | |
39 | * Table of the LTP coefficients | |
40 | */ | |
41 | static const float ltp_coef[8] = { | |
42 | 0.570829, 0.696616, 0.813004, 0.911304, | |
43 | 0.984900, 1.067894, 1.194601, 1.369533, | |
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][3] = { | |
84 | { { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, }, | |
85 | { { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, }, | |
86 | { { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, }, | |
87 | { { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_SCE, 1, AAC_CHANNEL_BACK }, }, | |
88 | { { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 1, AAC_CHANNEL_BACK }, }, | |
89 | { { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 1, AAC_CHANNEL_BACK }, { TYPE_LFE, 0, AAC_CHANNEL_LFE }, }, | |
90 | { { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 1, AAC_CHANNEL_FRONT }, { TYPE_CPE, 2, AAC_CHANNEL_BACK }, { TYPE_LFE, 0, AAC_CHANNEL_LFE }, }, | |
91 | }; | |
92 | ||
93 | static const uint64_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_BACK, | |
101 | 0, | |
102 | }; | |
103 | ||
104 | #endif /* AVCODEC_AACDECTAB_H */ |