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  1. /*
  2.  * AC-3 tables
  3.  * Copyright (c) 2000, 2001, 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. #ifndef AVCODEC_AC3TAB_H
  23. #define AVCODEC_AC3TAB_H
  24.  
  25. #include <stdint.h>
  26.  
  27. #include "libavutil/internal.h"
  28. #include "ac3.h"
  29.  
  30. #if CONFIG_HARDCODED_TABLES
  31. #   define HCONST const
  32. #else
  33. #   define HCONST
  34. #endif
  35.  
  36. extern const uint16_t ff_ac3_frame_size_tab[38][3];
  37. extern const uint8_t  ff_ac3_channels_tab[8];
  38. extern av_export const uint16_t avpriv_ac3_channel_layout_tab[8];
  39. extern const uint8_t  ff_ac3_enc_channel_map[8][2][6];
  40. extern const uint8_t  ff_ac3_dec_channel_map[8][2][6];
  41. extern const uint16_t ff_ac3_sample_rate_tab[3];
  42. extern const uint16_t ff_ac3_bitrate_tab[19];
  43. extern const uint8_t  ff_ac3_rematrix_band_tab[5];
  44. extern const uint8_t  ff_eac3_default_cpl_band_struct[18];
  45. extern const int16_t  ff_ac3_window[AC3_WINDOW_SIZE/2];
  46. extern const uint8_t  ff_ac3_log_add_tab[260];
  47. extern const uint16_t ff_ac3_hearing_threshold_tab[AC3_CRITICAL_BANDS][3];
  48. extern const uint8_t  ff_ac3_bap_tab[64];
  49. extern const uint8_t  ff_ac3_slow_decay_tab[4];
  50. extern const uint8_t  ff_ac3_fast_decay_tab[4];
  51. extern const uint16_t ff_ac3_slow_gain_tab[4];
  52. extern const uint16_t ff_ac3_db_per_bit_tab[4];
  53. extern const int16_t  ff_ac3_floor_tab[8];
  54. extern const uint16_t ff_ac3_fast_gain_tab[8];
  55. extern const uint16_t ff_eac3_default_chmap[8];
  56. extern const uint8_t  ff_ac3_band_start_tab[AC3_CRITICAL_BANDS+1];
  57. extern HCONST uint8_t ff_ac3_bin_to_band_tab[253];
  58.  
  59. /** Custom channel map locations bitmask
  60.  *  Other channels described in documentation:
  61.  *      Lc/Rc pair, Lrs/Rrs pair, Ts, Lsd/Rsd pair,
  62.  *      Lw/Rw pair, Lvh/Rvh pair, Cvh, Reserved, LFE2
  63.  */
  64. enum CustomChannelMapLocation{
  65.     AC3_CHMAP_L=        1<<(15-0),
  66.     AC3_CHMAP_C=        1<<(15-1),
  67.     AC3_CHMAP_R=        1<<(15-2),
  68.     AC3_CHMAP_L_SUR=    1<<(15-3),
  69.     AC3_CHMAP_R_SUR =   1<<(15-4),
  70.     AC3_CHMAP_C_SUR=    1<<(15-7),
  71.     AC3_CHMAP_LFE =     1<<(15-15)
  72. };
  73.  
  74. #endif /* AVCODEC_AC3TAB_H */
  75.