2001-12-09 15:28:44 +00:00
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/*
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* a52_internal.h
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* Copyright (C) 2000-2001 Michel Lespinasse <walken@zoy.org>
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* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
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*
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* This file is part of a52dec, a free ATSC A-52 stream decoder.
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* See http://liba52.sourceforge.net/ for updates.
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*
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* a52dec is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* a52dec is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#define LEVEL_PLUS6DB 2.0
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#define LEVEL_PLUS3DB 1.4142135623730951
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#define LEVEL_3DB 0.7071067811865476
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#define LEVEL_45DB 0.5946035575013605
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#define LEVEL_6DB 0.5
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#define EXP_REUSE (0)
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#define EXP_D15 (1)
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#define EXP_D25 (2)
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#define EXP_D45 (3)
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#define DELTA_BIT_REUSE (0)
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#define DELTA_BIT_NEW (1)
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#define DELTA_BIT_NONE (2)
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#define DELTA_BIT_RESERVED (3)
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void bit_allocate (a52_state_t * state, a52_ba_t * ba, int bndstart,
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int start, int end, int fastleak, int slowleak,
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uint8_t * exp, int8_t * bap);
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int downmix_init (int input, int flags, sample_t * level,
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sample_t clev, sample_t slev);
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2001-12-30 21:53:56 +00:00
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void downmix_accel_init(uint32_t mm_accel);
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2001-12-09 15:28:44 +00:00
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int downmix_coeff (sample_t * coeff, int acmod, int output, sample_t level,
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sample_t clev, sample_t slev);
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2001-12-30 19:57:14 +00:00
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extern void (*downmix) (sample_t * samples, int acmod, int output, sample_t bias,
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2001-12-09 15:28:44 +00:00
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sample_t clev, sample_t slev);
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2001-12-30 19:57:14 +00:00
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extern void (*upmix) (sample_t * samples, int acmod, int output);
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2001-12-09 15:28:44 +00:00
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void imdct_init (uint32_t mm_accel);
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extern void (* imdct_256) (sample_t * data, sample_t * delay, sample_t bias);
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extern void (* imdct_512) (sample_t * data, sample_t * delay, sample_t bias);
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void imdct_do_256_mlib (sample_t * data, sample_t * delay, sample_t bias);
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void imdct_do_512_mlib (sample_t * data, sample_t * delay, sample_t bias);
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