liba52/a52.h

   1 /*
   2  * a52.h
   3  * Copyright (C) 2000-2002 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 changelog at http://svn.mplayerhq.hu/mplayer/trunk/
  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 #ifndef A52_H
  29 #define A52_H
  30
  31 #ifndef LIBA52_DOUBLE
  32 typedef float sample_t;
  33 #else
  34 typedef double sample_t;
  35 #endif
  36
  37 typedef struct a52_state_s a52_state_t;
  38
  39 #define A52_CHANNEL 0
  40 #define A52_MONO 1
  41 #define A52_STEREO 2
  42 #define A52_3F 3
  43 #define A52_2F1R 4
  44 #define A52_3F1R 5
  45 #define A52_2F2R 6
  46 #define A52_3F2R 7
  47 #define A52_CHANNEL1 8
  48 #define A52_CHANNEL2 9
  49 #define A52_DOLBY 10
  50 #define A52_CHANNEL_MASK 15
  51
  52 #define A52_LFE 16
  53 #define A52_ADJUST_LEVEL 32
  54
  55 a52_state_t * a52_init (uint32_t mm_accel);
  56 sample_t * a52_samples (a52_state_t * state);
  57 int a52_syncinfo (uint8_t * buf, int * flags,
  58                   int * sample_rate, int * bit_rate);
  59 int a52_frame (a52_state_t * state, uint8_t * buf, int * flags,
  60                sample_t * level, sample_t bias);
  61 void a52_dynrng (a52_state_t * state,
  62                  sample_t (* call) (sample_t, void *), void * data);
  63 int a52_block (a52_state_t * state);
  64 void a52_free (a52_state_t * state);
  65
  66 void* a52_resample_init(uint32_t mm_accel,int flags,int chans);
  67 extern int (* a52_resample) (float * _f, int16_t * s16);
  68
  69 uint16_t crc16_block(uint8_t *data,uint32_t num_bytes);
  70
  71 #endif /* A52_H */