FFmpeg
•All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Modules Pages
ac3dec_data.h
Go to the documentation of this file.
1 /*
2  * AC-3 and E-AC-3 decoder tables
3  * Copyright (c) 2007 Bartlomiej Wolowiec <bartek.wolowiec@gmail.com>
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 #ifndef AVCODEC_AC3DEC_DATA_H
23 #define AVCODEC_AC3DEC_DATA_H
24 
25 #include <stdint.h>
26 
27 #include "libavutil/attributes_internal.h"
28 
29 FF_VISIBILITY_PUSH_HIDDEN
30 
31 extern const uint8_t ff_ac3_ungroup_3_in_5_bits_tab[32][3];
32 extern uint8_t ff_ac3_ungroup_3_in_7_bits_tab[128][3];
33 
34 extern const int ff_ac3_bap3_mantissas[ 7 + 1];
35 extern const int ff_ac3_bap5_mantissas[15 + 1];
36 
37 /** tables for ungrouping mantissas */
38 extern int ff_ac3_bap1_mantissas[32][3];
39 extern int ff_ac3_bap2_mantissas[128][3];
40 extern int ff_ac3_bap4_mantissas[128][2];
41 
42 extern const uint8_t ff_ac3_quantization_tab[16];
43 
44 extern const uint8_t ff_ac3_default_coeffs[8][5][2];
45 
46 extern const uint8_t ff_eac3_hebap_tab[64];
47 extern const uint8_t ff_eac3_default_spx_band_struct[17];
48 extern const float ff_eac3_gain_levels_lfe[32];
49 
50 void ff_ac3_init_static(void);
51 
52 FF_VISIBILITY_POP_HIDDEN
53 
54 #endif /* AVCODEC_AC3DEC_DATA_H */
FF_VISIBILITY_PUSH_HIDDEN
#define FF_VISIBILITY_PUSH_HIDDEN
Definition: attributes_internal.h:30
ff_ac3_bap2_mantissas
int ff_ac3_bap2_mantissas[128][3]
Definition: ac3dec_data.c:95
ff_ac3_bap5_mantissas
const int ff_ac3_bap5_mantissas[15+1]
Table 7.23.
Definition: ac3dec_data.c:76
ff_ac3_ungroup_3_in_7_bits_tab
uint8_t ff_ac3_ungroup_3_in_7_bits_tab[128][3]
table for ungrouping 3 values in 7 bits.
Definition: ac3dec_data.c:50
ff_eac3_default_spx_band_struct
const uint8_t ff_eac3_default_spx_band_struct[17]
Table E2.15 Default Spectral Extension Banding Structure.
Definition: ac3dec_data.c:177
ff_ac3_bap1_mantissas
int ff_ac3_bap1_mantissas[32][3]
tables for ungrouping mantissas
Definition: ac3dec_data.c:94
ff_ac3_init_static
void ff_ac3_init_static(void)
Definition: ac3dec_data.c:134
ff_ac3_bap3_mantissas
const int ff_ac3_bap3_mantissas[7+1]
Ungrouped mantissa tables; the extra entry is padding to avoid range checks.
Definition: ac3dec_data.c:64
attributes_internal.h
ff_ac3_bap4_mantissas
int ff_ac3_bap4_mantissas[128][2]
Definition: ac3dec_data.c:96
ff_eac3_hebap_tab
const uint8_t ff_eac3_hebap_tab[64]
Definition: ac3dec_data.c:164
ff_ac3_quantization_tab
const uint8_t ff_ac3_quantization_tab[16]
Quantization table: levels for symmetric.
Definition: ac3dec_data.c:144
ff_ac3_default_coeffs
const uint8_t ff_ac3_default_coeffs[8][5][2]
Table for default stereo downmixing coefficients reference: Section 7.8.2 Downmixing Into Two Channel...
Definition: ac3dec_data.c:153
FF_VISIBILITY_POP_HIDDEN
#define FF_VISIBILITY_POP_HIDDEN
Definition: attributes_internal.h:31
ff_ac3_ungroup_3_in_5_bits_tab
const FF_VISIBILITY_PUSH_HIDDEN uint8_t ff_ac3_ungroup_3_in_5_bits_tab[32][3]
Table used to ungroup 3 values stored in 5 bits.
Definition: ac3dec_data.c:35
ff_eac3_gain_levels_lfe
const float ff_eac3_gain_levels_lfe[32]
Adjustments in dB gain (LFE, +10 to -21 dB)
Definition: ac3dec_data.c:181
Generated on Sat Jun 14 2025 19:21:45 for FFmpeg by   doxygen 1.8.17