mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
d5d1c697bd
Both the fixed as well as the floating point mpegaudio decoders use LUTs of type int8_t and uint32_t with 32K entries each; these tables are completely the same, yet they are not shared. This commit makes them shared. When both fixed as well as floating point decoders are enabled, this saves 160KiB from the bss segment for a normal build (translating into 160KiB less memory usage if both a shared as well as a floating point decoder have actually been used) and 160KiB from the binary for a build with hardcoded tables. It also means that the code to create said LUTs is no longer duplicated (for a normal build). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/*
|
|
* MPEG Audio common tables
|
|
* copyright (c) 2002 Fabrice Bellard
|
|
*
|
|
* 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
|
|
* mpeg audio layer common tables.
|
|
*/
|
|
|
|
#ifndef AVCODEC_MPEGAUDIODATA_H
|
|
#define AVCODEC_MPEGAUDIODATA_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "config.h"
|
|
|
|
#include "internal.h"
|
|
#include "vlc.h"
|
|
|
|
#define MODE_EXT_MS_STEREO 2
|
|
#define MODE_EXT_I_STEREO 1
|
|
|
|
extern av_export_avcodec const uint16_t avpriv_mpa_bitrate_tab[2][3][15];
|
|
extern av_export_avcodec const uint16_t avpriv_mpa_freq_tab[3];
|
|
extern const int ff_mpa_sblimit_table[5];
|
|
extern const int ff_mpa_quant_steps[17];
|
|
extern const int ff_mpa_quant_bits[17];
|
|
extern const unsigned char * const ff_mpa_alloc_tables[5];
|
|
|
|
#define TABLE_4_3_SIZE ((8191 + 16)*4)
|
|
#if CONFIG_HARDCODED_TABLES
|
|
extern const int8_t ff_table_4_3_exp [TABLE_4_3_SIZE];
|
|
extern const uint32_t ff_table_4_3_value[TABLE_4_3_SIZE];
|
|
#else
|
|
extern int8_t ff_table_4_3_exp [TABLE_4_3_SIZE];
|
|
extern uint32_t ff_table_4_3_value[TABLE_4_3_SIZE];
|
|
#endif
|
|
|
|
/* VLCs for decoding layer 3 huffman tables */
|
|
extern VLC ff_huff_vlc[16];
|
|
extern VLC ff_huff_quad_vlc[2];
|
|
|
|
/* layer3 scale factor size */
|
|
extern const uint8_t ff_slen_table[2][16];
|
|
/* number of lsf scale factors for a given size */
|
|
extern const uint8_t ff_lsf_nsf_table[6][3][4];
|
|
extern const uint8_t ff_mpa_huff_data[32][2];
|
|
|
|
/* band size tables */
|
|
extern const uint8_t ff_band_size_long[9][22];
|
|
extern const uint8_t ff_band_size_short[9][13];
|
|
/* computed from ff_band_size_long */
|
|
extern uint16_t ff_band_index_long[9][23];
|
|
|
|
extern int16_t *const ff_division_tabs[4];
|
|
|
|
/* lower 2 bits: modulo 3, higher bits: shift */
|
|
extern uint16_t ff_scale_factor_modshift[64];
|
|
|
|
extern const uint8_t ff_mpa_pretab[2][22];
|
|
|
|
/* Initialize tables shared between the fixed and
|
|
* floating point MPEG audio decoders. */
|
|
void ff_mpegaudiodec_common_init_static(void);
|
|
|
|
#endif /* AVCODEC_MPEGAUDIODATA_H */
|