3 * Copyright (C) 2000-2001 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 * 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/
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.
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.
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
28 #define LEVEL_PLUS6DB 2.0
29 #define LEVEL_PLUS3DB 1.4142135623730951
30 #define LEVEL_3DB 0.7071067811865476
31 #define LEVEL_45DB 0.5946035575013605
39 #define DELTA_BIT_REUSE (0)
40 #define DELTA_BIT_NEW (1)
41 #define DELTA_BIT_NONE (2)
42 #define DELTA_BIT_RESERVED (3)
58 void bit_allocate (a52_state_t
* state
, a52_ba_t
* ba
, int bndstart
,
59 int start
, int end
, int fastleak
, int slowleak
,
60 uint8_t * exp
, int8_t * bap
);
62 int downmix_init (int input
, int flags
, sample_t
* level
,
63 sample_t clev
, sample_t slev
);
64 void downmix_accel_init(uint32_t mm_accel
);
65 int downmix_coeff (sample_t
* coeff
, int acmod
, int output
, sample_t level
,
66 sample_t clev
, sample_t slev
);
67 extern void (*downmix
) (sample_t
* samples
, int acmod
, int output
, sample_t bias
,
68 sample_t clev
, sample_t slev
);
69 extern void (*upmix
) (sample_t
* samples
, int acmod
, int output
);
71 void imdct_init (uint32_t mm_accel
);
72 extern void (* imdct_256
) (sample_t
* data
, sample_t
* delay
, sample_t bias
);
73 extern void (* imdct_512
) (sample_t
* data
, sample_t
* delay
, sample_t bias
);
74 void imdct_do_256_mlib (sample_t
* data
, sample_t
* delay
, sample_t bias
);
75 void imdct_do_512_mlib (sample_t
* data
, sample_t
* delay
, sample_t bias
);