FFmpeg
mpegaudiodata.h
Go to the documentation of this file.
1 /*
2  * MPEG Audio common tables
3  * copyright (c) 2002 Fabrice Bellard
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 /**
23  * @file
24  * mpeg audio layer common tables.
25  */
26 
27 #ifndef AVCODEC_MPEGAUDIODATA_H
28 #define AVCODEC_MPEGAUDIODATA_H
29 
30 #include <stdint.h>
31 
32 #include "config.h"
33 
34 #include "libavutil/attributes_internal.h"
35 #include "vlc.h"
36 
37 #define MODE_EXT_MS_STEREO 2
38 #define MODE_EXT_I_STEREO 1
39 
40 FF_VISIBILITY_PUSH_HIDDEN
41 extern const uint16_t ff_mpa_bitrate_tab[2][3][15];
42 extern const uint16_t ff_mpa_freq_tab[3];
43 extern const int ff_mpa_sblimit_table[5];
44 extern const int ff_mpa_quant_steps[17];
45 extern const int ff_mpa_quant_bits[17];
46 extern const unsigned char * const ff_mpa_alloc_tables[5];
47 
48 #define TABLE_4_3_SIZE ((8191 + 16)*4)
49 #if CONFIG_HARDCODED_TABLES
50 extern const int8_t ff_table_4_3_exp [TABLE_4_3_SIZE];
51 extern const uint32_t ff_table_4_3_value[TABLE_4_3_SIZE];
52 #else
53 extern int8_t ff_table_4_3_exp [TABLE_4_3_SIZE];
54 extern uint32_t ff_table_4_3_value[TABLE_4_3_SIZE];
55 #endif
56 
57 /* VLCs for decoding layer 3 huffman tables */
58 extern const VLCElem *ff_huff_vlc[16];
59 extern VLC ff_huff_quad_vlc[2];
60 
61 /* layer3 scale factor size */
62 extern const uint8_t ff_slen_table[2][16];
63 /* number of lsf scale factors for a given size */
64 extern const uint8_t ff_lsf_nsf_table[6][3][4];
65 extern const uint8_t ff_mpa_huff_data[32][2];
66 
67 /* band size tables */
68 extern const uint8_t ff_band_size_long[9][22];
69 extern const uint8_t ff_band_size_short[9][13];
70 /* computed from ff_band_size_long */
71 extern uint16_t ff_band_index_long[9][23];
72 
73 extern int16_t *const ff_division_tabs[4];
74 
75 /* lower 2 bits: modulo 3, higher bits: shift */
76 extern uint16_t ff_scale_factor_modshift[64];
77 
78 extern const uint8_t ff_mpa_pretab[2][22];
79 
80 /* Initialize tables shared between the fixed and
81  * floating point MPEG audio decoders. */
82 void ff_mpegaudiodec_common_init_static(void);
83 FF_VISIBILITY_POP_HIDDEN
84 
85 #endif /* AVCODEC_MPEGAUDIODATA_H */
FF_VISIBILITY_PUSH_HIDDEN
#define FF_VISIBILITY_PUSH_HIDDEN
Definition: attributes_internal.h:30
TABLE_4_3_SIZE
#define TABLE_4_3_SIZE
Definition: mpegaudiodata.h:48
ff_mpa_quant_bits
const int ff_mpa_quant_bits[17]
Definition: mpegaudiodata.c:42
ff_table_4_3_exp
int8_t ff_table_4_3_exp[TABLE_4_3_SIZE]
Definition: mpegaudiodec_common_tablegen.h:38
ff_slen_table
const uint8_t ff_slen_table[2][16]
Definition: mpegaudiodec_common.c:52
ff_mpa_huff_data
const uint8_t ff_mpa_huff_data[32][2]
Definition: mpegaudiodec_common.c:315
attributes_internal.h
ff_mpa_quant_steps
const int ff_mpa_quant_steps[17]
Definition: mpegaudiodata.c:34
ff_mpegaudiodec_common_init_static
void ff_mpegaudiodec_common_init_static(void)
Definition: mpegaudiodec_common.c:476
ff_huff_quad_vlc
VLC ff_huff_quad_vlc[2]
Definition: mpegaudiodec_common.c:70
ff_division_tabs
int16_t *const ff_division_tabs[4]
Definition: mpegaudiodec_common.c:44
VLCElem
Definition: vlc.h:32
FF_VISIBILITY_POP_HIDDEN
#define FF_VISIBILITY_POP_HIDDEN
Definition: attributes_internal.h:31
ff_band_index_long
uint16_t ff_band_index_long[9][23]
Definition: mpegaudiodec_common.c:395
ff_table_4_3_value
uint32_t ff_table_4_3_value[TABLE_4_3_SIZE]
Definition: mpegaudiodec_common_tablegen.h:39
ff_mpa_pretab
const uint8_t ff_mpa_pretab[2][22]
Definition: mpegaudiodec_common.c:397
VLC
Definition: vlc.h:36
ff_mpa_alloc_tables
const unsigned char *const ff_mpa_alloc_tables[5]
Definition: mpegaudiodata.c:132
ff_mpa_freq_tab
const uint16_t ff_mpa_freq_tab[3]
Definition: mpegaudiotabs.h:37
ff_mpa_sblimit_table
const int ff_mpa_sblimit_table[5]
Definition: mpegaudiodata.c:32
ff_huff_vlc
const VLCElem * ff_huff_vlc[16]
Definition: mpegaudiodec_common.c:67
ff_band_size_long
const uint8_t ff_band_size_long[9][22]
Definition: mpegaudiodec_common.c:362
ff_scale_factor_modshift
uint16_t ff_scale_factor_modshift[64]
Definition: mpegaudiodec_common.c:38
ff_mpa_bitrate_tab
const FF_VISIBILITY_PUSH_HIDDEN uint16_t ff_mpa_bitrate_tab[2][3][15]
Definition: mpegaudiotabs.h:27
ff_lsf_nsf_table
const uint8_t ff_lsf_nsf_table[6][3][4]
Definition: mpegaudiodec_common.c:57
vlc.h
ff_band_size_short
const uint8_t ff_band_size_short[9][13]
Definition: mpegaudiodec_common.c:383
Generated on Thu Nov 21 2024 19:21:59 for FFmpeg by   doxygen 1.8.17