summaryrefslogtreecommitdiffstats
path: root/libavcodec/aacdectab.h
blob: e4b87d79a06710b9a50abee889d2afc811ecf75a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
/*
 * AAC decoder data
 * Copyright (c) 2005-2006 Oded Shimon ( ods15 ods15 dyndns org )
 * Copyright (c) 2006-2007 Maxim Gavrilov ( maxim.gavrilov gmail com )
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file aacdectab.h
 * AAC decoder data
 * @author Oded Shimon  ( ods15 ods15 dyndns org )
 * @author Maxim Gavrilov ( maxim.gavrilov gmail com )
 */

#ifndef AVCODEC_AACDECTAB_H
#define AVCODEC_AACDECTAB_H

#include "aac.h"

#include <stdint.h>

/* @name swb_offsets
 * Sample offset into the window indicating the beginning of a scalefactor
 * window band
 *
 * scalefactor window band - term for scalefactor bands within a window,
 * given in Table 4.110 to Table 4.128.
 *
 * scalefactor band - a set of spectral coefficients which are scaled by one
 * scalefactor. In case of EIGHT_SHORT_SEQUENCE and grouping a scalefactor band
 * may contain several scalefactor window bands of corresponding frequency. For
 * all other window_sequences scalefactor bands and scalefactor window bands are
 * identical.
 * @{
 */

static const uint16_t swb_offset_1024_96[] = {
      0,   4,   8,  12,  16,  20,  24,  28,
     32,  36,  40,  44,  48,  52,  56,  64,
     72,  80,  88,  96, 108, 120, 132, 144,
    156, 172, 188, 212, 240, 276, 320, 384,
    448, 512, 576, 640, 704, 768, 832, 896,
    960, 1024
};

static const uint16_t swb_offset_128_96[] = {
    0, 4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 92, 128
};

static const uint16_t swb_offset_1024_64[] = {
      0,   4,   8,  12,  16,  20,  24,  28,
     32,  36,  40,  44,  48,  52,  56,  64,
     72,  80,  88, 100, 112, 124, 140, 156,
    172, 192, 216, 240, 268, 304, 344, 384,
    424, 464, 504, 544, 584, 624, 664, 704,
    744, 784, 824, 864, 904, 944, 984, 1024
};

static const uint16_t swb_offset_1024_48[] = {
      0,   4,   8,  12,  16,  20,  24,  28,
     32,  36,  40,  48,  56,  64,  72,  80,
     88,  96, 108, 120, 132, 144, 160, 176,
    196, 216, 240, 264, 292, 320, 352, 384,
    416, 448, 480, 512, 544, 576, 608, 640,
    672, 704, 736, 768, 800, 832, 864, 896,
    928, 1024
};

static const uint16_t swb_offset_128_48[] = {
     0,   4,   8,  12,  16,  20,  28,  36,
    44,  56,  68,  80,  96, 112, 128
};

static const uint16_t swb_offset_1024_32[] = {
      0,   4,   8,  12,  16,  20,  24,  28,
     32,  36,  40,  48,  56,  64,  72,  80,
     88,  96, 108, 120, 132, 144, 160, 176,
    196, 216, 240, 264, 292, 320, 352, 384,
    416, 448, 480, 512, 544, 576, 608, 640,
    672, 704, 736, 768, 800, 832, 864, 896,
    928, 960, 992, 1024
};

static const uint16_t swb_offset_1024_24[] = {
      0,   4,   8,  12,  16,  20,  24,  28,
     32,  36,  40,  44,  52,  60,  68,  76,
     84,  92, 100, 108, 116, 124, 136, 148,
    160, 172, 188, 204, 220, 240, 260, 284,
    308, 336, 364, 396, 432, 468, 508, 552,
    600, 652, 704, 768, 832, 896, 960, 1024
};

static const uint16_t swb_offset_128_24[] = {
     0,   4,   8,  12,  16,  20,  24,  28,
    36,  44,  52,  64,  76,  92, 108, 128
};

static const uint16_t swb_offset_1024_16[] = {
      0,   8,  16,  24,  32,  40,  48,  56,
     64,  72,  80,  88, 100, 112, 124, 136,
    148, 160, 172, 184, 196, 212, 228, 244,
    260, 280, 300, 320, 344, 368, 396, 424,
    456, 492, 532, 572, 616, 664, 716, 772,
    832, 896, 960, 1024
};

static const uint16_t swb_offset_128_16[] = {
     0,   4,   8,  12,  16,  20,  24,  28,
    32,  40,  48,  60,  72,  88, 108, 128
};

static const uint16_t swb_offset_1024_8[] = {
      0,  12,  24,  36,  48,  60,  72,  84,
     96, 108, 120, 132, 144, 156, 172, 188,
    204, 220, 236, 252, 268, 288, 308, 328,
    348, 372, 396, 420, 448, 476, 508, 544,
    580, 620, 664, 712, 764, 820, 880, 944,
    1024
};

static const uint16_t swb_offset_128_8[] = {
     0,   4,   8,  12,  16,  20,  24,  28,
    36,  44,  52,  60,  72,  88, 108, 128
};

static const uint16_t *swb_offset_1024[] = {
    swb_offset_1024_96, swb_offset_1024_96, swb_offset_1024_64,
    swb_offset_1024_48, swb_offset_1024_48, swb_offset_1024_32,
    swb_offset_1024_24, swb_offset_1024_24, swb_offset_1024_16,
    swb_offset_1024_16, swb_offset_1024_16, swb_offset_1024_8
};

static const uint16_t *swb_offset_128[] = {
    /* The last entry on the following row is swb_offset_128_64 but is a
       duplicate of swb_offset_128_96. */
    swb_offset_128_96, swb_offset_128_96, swb_offset_128_96,
    swb_offset_128_48, swb_offset_128_48, swb_offset_128_48,
    swb_offset_128_24, swb_offset_128_24, swb_offset_128_16,
    swb_offset_128_16, swb_offset_128_16, swb_offset_128_8
};

// @}

/* @name tns_max_bands
 * The maximum number of scalefactor bands on which TNS can operate for the long
 * and short transforms respectively. The index to these tables is related to
 * the sample rate of the audio.
 * @{
 */
static const uint8_t tns_max_bands_1024[] = {
    31, 31, 34, 40, 42, 51, 46, 46, 42, 42, 42, 39
};

static const uint8_t tns_max_bands_128[] = {
    9, 9, 10, 14, 14, 14, 14, 14, 14, 14, 14, 14
};
// @}

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

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

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

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

static const float *tns_tmp2_map[4] = {
    tns_tmp2_map_0_3,
    tns_tmp2_map_0_4,
    tns_tmp2_map_1_3,
    tns_tmp2_map_1_4
};
// @}

#endif /* AVCODEC_AACDECTAB_H */
OpenPOWER on IntegriCloud