apps/codecs/liba52/a52.h

   1 /*
   2  * a52.h
   3  * Copyright (C) 2000-2003 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 #ifndef A52_H
  25 #define A52_H
  26
  27 #if defined(LIBA52_FIXED)
  28 typedef int32_t sample_t;
  29 typedef int32_t level_t;
  30 #elif defined(LIBA52_DOUBLE)
  31 typedef double sample_t;
  32 typedef double level_t;
  33 #else
  34 typedef float sample_t;
  35 typedef float level_t;
  36 #endif
  37
  38 typedef struct a52_state_s a52_state_t;
  39
  40 #define A52_CHANNEL 0
  41 #define A52_MONO 1
  42 #define A52_STEREO 2
  43 #define A52_3F 3
  44 #define A52_2F1R 4
  45 #define A52_3F1R 5
  46 #define A52_2F2R 6
  47 #define A52_3F2R 7
  48 #define A52_CHANNEL1 8
  49 #define A52_CHANNEL2 9
  50 #define A52_DOLBY 10
  51 #define A52_CHANNEL_MASK 15
  52
  53 #define A52_LFE 16
  54 #define A52_ADJUST_LEVEL 32
  55
  56 a52_state_t * a52_init (uint32_t mm_accel);
  57 sample_t * a52_samples (a52_state_t * state);
  58 int a52_syncinfo (uint8_t * buf, int * flags,
  59                   int * sample_rate, int * bit_rate);
  60 int a52_frame (a52_state_t * state, uint8_t * buf, int * flags,
  61                level_t * level, sample_t bias);
  62 void a52_dynrng (a52_state_t * state,
  63                  level_t (* call) (level_t, void *), void * data);
  64 int a52_block (a52_state_t * state);
  65 void a52_free (a52_state_t * state);
  66
  67 #endif /* A52_H */