3 * Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
4 * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
6 * This file is part of a52dec, a free ATSC A-52 stream decoder.
7 * See http://liba52.sourceforge.net/ for updates.
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.
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.
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 #include "../avcodec.h"
33 #if defined(LIBA52_FIXED)
34 typedef int32_t sample_t;
35 typedef int32_t level_t;
36 #elif defined(LIBA52_DOUBLE)
37 typedef double sample_t;
38 typedef double level_t;
40 typedef float sample_t;
41 typedef float level_t;
44 typedef struct a52_state_s a52_state_t;
54 #define A52_CHANNEL1 8
55 #define A52_CHANNEL2 9
57 #define A52_CHANNEL_MASK 15
60 #define A52_ADJUST_LEVEL 32
62 a52_state_t * a52_init (uint32_t mm_accel);
63 sample_t * a52_samples (a52_state_t * state);
64 int a52_syncinfo (uint8_t * buf, int * flags,
65 int * sample_rate, int * bit_rate);
66 int a52_frame (a52_state_t * state, uint8_t * buf, int * flags,
67 level_t * level, sample_t bias);
68 void a52_dynrng (a52_state_t * state,
69 level_t (* call) (level_t, void *), void * data);
70 int a52_block (a52_state_t * state);
71 void a52_free (a52_state_t * state);