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  * Modified for use with MPlayer, changes contained in liba52_changes.diff.
  10  * detailed CVS changelog at http://www.mplayerhq.hu/cgi-bin/cvsweb.cgi/main/
  11  * $Id$
  12  *
  13  * a52dec is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * a52dec is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  26  */
  27
  28 #define LEVEL_PLUS6DB 2.0
  29 #define LEVEL_PLUS3DB 1.4142135623730951
  30 #define LEVEL_3DB 0.7071067811865476
  31 #define LEVEL_45DB 0.5946035575013605
  32 #define LEVEL_6DB 0.5
  33
  34 #define EXP_REUSE (0)
  35 #define EXP_D15   (1)
  36 #define EXP_D25   (2)
  37 #define EXP_D45   (3)
  38
  39 #define DELTA_BIT_REUSE (0)
  40 #define DELTA_BIT_NEW (1)
  41 #define DELTA_BIT_NONE (2)
  42 #define DELTA_BIT_RESERVED (3)
  43
  44 void bit_allocate (a52_state_t * state, a52_ba_t * ba, int bndstart,
  45                    int start, int end, int fastleak, int slowleak,
  46                    uint8_t * exp, int8_t * bap);
  47
  48 int downmix_init (int input, int flags, sample_t * level,
  49                   sample_t clev, sample_t slev);
  50 void downmix_accel_init(uint32_t mm_accel);
  51 int downmix_coeff (sample_t * coeff, int acmod, int output, sample_t level,
  52                    sample_t clev, sample_t slev);
  53 extern void (*downmix) (sample_t * samples, int acmod, int output, sample_t bias,
  54               sample_t clev, sample_t slev);
  55 extern void (*upmix) (sample_t * samples, int acmod, int output);
  56
  57 void imdct_init (uint32_t mm_accel);
  58 extern void (* imdct_256) (sample_t * data, sample_t * delay, sample_t bias);
  59 extern void (* imdct_512) (sample_t * data, sample_t * delay, sample_t bias);
  60 void imdct_do_256_mlib (sample_t * data, sample_t * delay, sample_t bias);
  61 void imdct_do_512_mlib (sample_t * data, sample_t * delay, sample_t bias);