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FFmpeg/libavcodec/aacdectab.h
Andreas Rheinhardt 0b4e69cc87 avcodec/aacdec_common: Avoid superfluous VLC structures for SBR VLCs
For all VLCs here, the number of bits of the VLC is
write-only, because it is hardcoded at the call site.
Therefore one can replace these VLC structures with
the only thing that is actually used: The pointer
to the VLCElem table.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2023-10-31 21:44:48 +01:00

60 lines
1.6 KiB
C

/*
* AAC decoder data
*
* 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
* 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 <stdint.h>
#include "vlc.h"
#include "libavutil/attributes_internal.h"
#include "libavutil/channel_layout.h"
FF_VISIBILITY_PUSH_HIDDEN
void ff_aacdec_common_init_once(void);
extern const VLCElem *ff_aac_sbr_vlc[10];
extern VLCElem ff_vlc_scalefactors[];
extern const VLCElem *ff_vlc_spectral[11];
extern const int8_t ff_tags_per_config[16];
extern const uint8_t ff_aac_channel_layout_map[16][16][3];
extern const int16_t ff_aac_channel_map[3][4][6];
#if FF_API_OLD_CHANNEL_LAYOUT
extern const uint64_t ff_aac_channel_layout[];
#endif
extern const AVChannelLayout ff_aac_ch_layout[];
FF_VISIBILITY_POP_HIDDEN
#endif /* AVCODEC_AACDECTAB_H */