libavcodec/ac3tab.h

   1 /*
   2  * AC-3 tables
   3  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
   4  *
   5  * This file is part of Libav.
   6  *
   7  * Libav 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  * Libav 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 Libav; 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_AC3TAB_H
  23 #define AVCODEC_AC3TAB_H
  24
  25 #include "libavutil/common.h"
  26 #include "ac3.h"
  27
  28 #if CONFIG_HARDCODED_TABLES
  29 #   define HCONST const
  30 #else
  31 #   define HCONST
  32 #endif
  33
  34 extern const uint16_t ff_ac3_frame_size_tab[38][3];
  35 extern const uint8_t  ff_ac3_channels_tab[8];
  36 extern av_export const uint16_t avpriv_ac3_channel_layout_tab[8];
  37 extern const uint8_t  ff_ac3_enc_channel_map[8][2][6];
  38 extern const uint8_t  ff_ac3_dec_channel_map[8][2][6];
  39 extern const uint16_t ff_ac3_sample_rate_tab[3];
  40 extern const uint16_t ff_ac3_bitrate_tab[19];
  41 extern const uint8_t  ff_ac3_rematrix_band_tab[5];
  42 extern const uint8_t  ff_eac3_default_cpl_band_struct[18];
  43 extern const int16_t  ff_ac3_window[AC3_WINDOW_SIZE/2];
  44 extern const uint8_t  ff_ac3_log_add_tab[260];
  45 extern const uint16_t ff_ac3_hearing_threshold_tab[AC3_CRITICAL_BANDS][3];
  46 extern const uint8_t  ff_ac3_bap_tab[64];
  47 extern const uint8_t  ff_ac3_slow_decay_tab[4];
  48 extern const uint8_t  ff_ac3_fast_decay_tab[4];
  49 extern const uint16_t ff_ac3_slow_gain_tab[4];
  50 extern const uint16_t ff_ac3_db_per_bit_tab[4];
  51 extern const int16_t  ff_ac3_floor_tab[8];
  52 extern const uint16_t ff_ac3_fast_gain_tab[8];
  53 extern const uint16_t ff_eac3_default_chmap[8];
  54 extern const uint8_t  ff_ac3_band_start_tab[AC3_CRITICAL_BANDS+1];
  55 extern HCONST uint8_t ff_ac3_bin_to_band_tab[253];
  56
  57 /** Custom channel map locations bitmask
  58  *  Other channels described in documentation:
  59  *      Lc/Rc pair, Lrs/Rrs pair, Ts, Lsd/Rsd pair,
  60  *      Lw/Rw pair, Lvh/Rvh pair, Cvh, Reserved, LFE2
  61  */
  62 enum CustomChannelMapLocation{
  63     AC3_CHMAP_L=        1<<(15-0),
  64     AC3_CHMAP_C=        1<<(15-1),
  65     AC3_CHMAP_R=        1<<(15-2),
  66     AC3_CHMAP_L_SUR=    1<<(15-3),
  67     AC3_CHMAP_R_SUR =   1<<(15-4),
  68     AC3_CHMAP_C_SUR=    1<<(15-7),
  69     AC3_CHMAP_LFE =     1<<(15-15)
  70 };
  71
  72 #endif /* AVCODEC_AC3TAB_H */