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# a52.h

    00001 /*
    00002  * a52.h
    00003  * Copyright (C) 2000-2002 Michel Lespinasse <walken@zoy.org>
    00004  * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
    00005  *
    00006  * This file is part of a52dec, a free ATSC A-52 stream decoder.
    00007  * See http://liba52.sourceforge.net/ for updates.
    00008  *
    00009  * a52dec is free software; you can redistribute it and/or modify
    00010  * it under the terms of the GNU General Public License as published by
    00011  * the Free Software Foundation; either version 2 of the License, or
    00012  * (at your option) any later version.
    00013  *
    00014  * a52dec is distributed in the hope that it will be useful,
    00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00017  * GNU General Public License for more details.
    00018  *
    00019  * You should have received a copy of the GNU General Public License
    00020  * along with this program; if not, write to the Free Software
    00021  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    00022  */
    00023
    00024 #ifndef A52_H
    00025 #define A52_H
    00026
    00027 #define LIBA52_DOUBLE
    00028
    00029 # ifdef __cplusplus
    00030 extern "C" {
    00031 # endif
    00032
    00033 #ifndef LIBA52_DOUBLE
    00034 typedef float sample_t;
    00035 #else
    00036 typedef double sample_t;
    00037 #endif
    00038
    00039 typedef struct a52_state_s a52_state_t;
    00040
    00041 #define A52_CHANNEL 0
    00042 #define A52_MONO 1
    00043 #define A52_STEREO 2
    00044 #define A52_3F 3
    00045 #define A52_2F1R 4
    00046 #define A52_3F1R 5
    00047 #define A52_2F2R 6
    00048 #define A52_3F2R 7
    00049 #define A52_CHANNEL1 8
    00050 #define A52_CHANNEL2 9
    00051 #define A52_DOLBY 10
    00052 #define A52_CHANNEL_MASK 15
    00053
    00054 #define A52_LFE 16
    00055 #define A52_ADJUST_LEVEL 32
    00056
    00057 a52_state_t * a52_init (uint32_t mm_accel);
    00058 sample_t * a52_samples (a52_state_t * state);
    00059 int a52_syncinfo (uint8_t * buf, int * flags,
    00060                   int * sample_rate, int * bit_rate);
    00061 int a52_frame (a52_state_t * state, uint8_t * buf, int * flags,
    00062                sample_t * level, sample_t bias);
    00063 void a52_dynrng (a52_state_t * state,
    00064                  sample_t (* call) (sample_t, void *), void * data);
    00065 int a52_block (a52_state_t * state);
    00066 void a52_free (a52_state_t * state);
    00067
    00068 # ifdef __cplusplus
    00069 }
    00070 # endif
    00071
    00072 #endif /* A52_H */