dc7e07ac1f
This improves the audio quality significantly for stereo source with both the fixed-point and floating-point AC-3 encoders. Update acodec-ac3_fixed and seek-ac3_rm test references. Originally committed as revision 26271 to svn://svn.ffmpeg.org/ffmpeg/trunk
65 lines
2.4 KiB
C
65 lines
2.4 KiB
C
/*
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* AC-3 tables
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_AC3TAB_H
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#define AVCODEC_AC3TAB_H
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#include "libavutil/common.h"
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#include "ac3.h"
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extern const uint16_t ff_ac3_frame_size_tab[38][3];
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extern const uint8_t ff_ac3_channels_tab[8];
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extern const uint16_t ff_ac3_channel_layout_tab[8];
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extern const uint8_t ff_ac3_enc_channel_map[8][2][6];
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extern const uint8_t ff_ac3_dec_channel_map[8][2][6];
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extern const uint16_t ff_ac3_sample_rate_tab[3];
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extern const uint16_t ff_ac3_bitrate_tab[19];
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extern const uint8_t ff_ac3_rematrix_band_tab[5];
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extern const int16_t ff_ac3_window[AC3_WINDOW_SIZE/2];
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extern const uint8_t ff_ac3_log_add_tab[260];
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extern const uint16_t ff_ac3_hearing_threshold_tab[AC3_CRITICAL_BANDS][3];
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extern const uint8_t ff_ac3_bap_tab[64];
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extern const uint8_t ff_ac3_slow_decay_tab[4];
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extern const uint8_t ff_ac3_fast_decay_tab[4];
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extern const uint16_t ff_ac3_slow_gain_tab[4];
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extern const uint16_t ff_ac3_db_per_bit_tab[4];
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extern const int16_t ff_ac3_floor_tab[8];
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extern const uint16_t ff_ac3_fast_gain_tab[8];
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extern const uint8_t ff_ac3_critical_band_size_tab[AC3_CRITICAL_BANDS];
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extern const uint16_t ff_eac3_default_chmap[8];
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/** Custom channel map locations bitmask
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* Other channels described in documentation:
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* Lc/Rc pair, Lrs/Rrs pair, Ts, Lsd/Rsd pair,
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* Lw/Rw pair, Lvh/Rvh pair, Cvh, Reserved, LFE2
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*/
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enum CustomChannelMapLocation{
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AC3_CHMAP_L= 1<<(15-0),
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AC3_CHMAP_C= 1<<(15-1),
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AC3_CHMAP_R= 1<<(15-2),
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AC3_CHMAP_L_SUR= 1<<(15-3),
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AC3_CHMAP_R_SUR = 1<<(15-4),
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AC3_CHMAP_C_SUR= 1<<(15-7),
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AC3_CHMAP_LFE = 1<<(15-15)
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};
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#endif /* AVCODEC_AC3TAB_H */
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