liba52/a52_internal.h

   1 /*
   2  * a52_internal.h
   3  * Copyright (C) 2000-2001 Michel Lespinasse <walken@zoy.org>
   4  * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
   5  *
   6  * This file is part of a52dec, a free ATSC A-52 stream decoder.
   7  * See http://liba52.sourceforge.net/ for updates.
   8  *
   9  * a52dec is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * a52dec is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24 #define LEVEL_PLUS6DB 2.0
  25 #define LEVEL_PLUS3DB 1.4142135623730951
  26 #define LEVEL_3DB 0.7071067811865476
  27 #define LEVEL_45DB 0.5946035575013605
  28 #define LEVEL_6DB 0.5
  29
  30 #define EXP_REUSE (0)
  31 #define EXP_D15   (1)
  32 #define EXP_D25   (2)
  33 #define EXP_D45   (3)
  34
  35 #define DELTA_BIT_REUSE (0)
  36 #define DELTA_BIT_NEW (1)
  37 #define DELTA_BIT_NONE (2)
  38 #define DELTA_BIT_RESERVED (3)
  39
  40 void bit_allocate (a52_state_t * state, a52_ba_t * ba, int bndstart,
  41                    int start, int end, int fastleak, int slowleak,
  42                    uint8_t * exp, int8_t * bap);
  43
  44 int downmix_init (int input, int flags, sample_t * level,
  45                   sample_t clev, sample_t slev);
  46 void downmix_accel_init(uint32_t mm_accel);
  47 int downmix_coeff (sample_t * coeff, int acmod, int output, sample_t level,
  48                    sample_t clev, sample_t slev);
  49 extern void (*downmix) (sample_t * samples, int acmod, int output, sample_t bias,
  50               sample_t clev, sample_t slev);
  51 extern void (*upmix) (sample_t * samples, int acmod, int output);
  52
  53 void imdct_init (uint32_t mm_accel);
  54 extern void (* imdct_256) (sample_t * data, sample_t * delay, sample_t bias);
  55 extern void (* imdct_512) (sample_t * data, sample_t * delay, sample_t bias);
  56 void imdct_do_256_mlib (sample_t * data, sample_t * delay, sample_t bias);
  57 void imdct_do_512_mlib (sample_t * data, sample_t * delay, sample_t bias);