diff options
Diffstat (limited to 'faad2/src/libfaad/drc.c')
| -rw-r--r-- | faad2/src/libfaad/drc.c | 173 |
1 files changed, 0 insertions, 173 deletions
diff --git a/faad2/src/libfaad/drc.c b/faad2/src/libfaad/drc.c deleted file mode 100644 index 7a99d4a..0000000 --- a/faad2/src/libfaad/drc.c +++ /dev/null @@ -1,173 +0,0 @@ -/*
-** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
-** Copyright (C) 2003-2005 M. Bakker, Nero AG, http://www.nero.com
-**
-** This program is free software; you can redistribute it and/or modify
-** it under the terms of the GNU General Public License as published by
-** the Free Software Foundation; either version 2 of the License, or
-** (at your option) any later version.
-**
-** This program is distributed in the hope that it will be useful,
-** but WITHOUT ANY WARRANTY; without even the implied warranty of
-** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-** GNU General Public License for more details.
-**
-** You should have received a copy of the GNU General Public License
-** along with this program; if not, write to the Free Software
-** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-**
-** Any non-GPL usage of this software or parts of this software is strictly
-** forbidden.
-**
-** The "appropriate copyright message" mentioned in section 2c of the GPLv2
-** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"
-**
-** Commercial non-GPL licensing of this software is possible.
-** For more info contact Nero AG through Mpeg4AAClicense@nero.com.
-**
-** $Id: drc.c,v 1.28 2007/11/01 12:33:30 menno Exp $
-**/
-
-#include "common.h"
-#include "structs.h"
-
-#include <stdlib.h>
-#include <string.h>
-#include "syntax.h"
-#include "drc.h"
-
-drc_info *drc_init(real_t cut, real_t boost)
-{
- drc_info *drc = (drc_info*)faad_malloc(sizeof(drc_info));
- memset(drc, 0, sizeof(drc_info));
-
- drc->ctrl1 = cut;
- drc->ctrl2 = boost;
-
- drc->num_bands = 1;
- drc->band_top[0] = 1024/4 - 1;
- drc->dyn_rng_sgn[0] = 1;
- drc->dyn_rng_ctl[0] = 0;
-
- return drc;
-}
-
-void drc_end(drc_info *drc)
-{
- if (drc) faad_free(drc);
-}
-
-#ifdef FIXED_POINT
-static real_t drc_pow2_table[] =
-{
- COEF_CONST(0.5146511183),
- COEF_CONST(0.5297315472),
- COEF_CONST(0.5452538663),
- COEF_CONST(0.5612310242),
- COEF_CONST(0.5776763484),
- COEF_CONST(0.5946035575),
- COEF_CONST(0.6120267717),
- COEF_CONST(0.6299605249),
- COEF_CONST(0.6484197773),
- COEF_CONST(0.6674199271),
- COEF_CONST(0.6869768237),
- COEF_CONST(0.7071067812),
- COEF_CONST(0.7278265914),
- COEF_CONST(0.7491535384),
- COEF_CONST(0.7711054127),
- COEF_CONST(0.7937005260),
- COEF_CONST(0.8169577266),
- COEF_CONST(0.8408964153),
- COEF_CONST(0.8655365610),
- COEF_CONST(0.8908987181),
- COEF_CONST(0.9170040432),
- COEF_CONST(0.9438743127),
- COEF_CONST(0.9715319412),
- COEF_CONST(1.0000000000),
- COEF_CONST(1.0293022366),
- COEF_CONST(1.0594630944),
- COEF_CONST(1.0905077327),
- COEF_CONST(1.1224620483),
- COEF_CONST(1.1553526969),
- COEF_CONST(1.1892071150),
- COEF_CONST(1.2240535433),
- COEF_CONST(1.2599210499),
- COEF_CONST(1.2968395547),
- COEF_CONST(1.3348398542),
- COEF_CONST(1.3739536475),
- COEF_CONST(1.4142135624),
- COEF_CONST(1.4556531828),
- COEF_CONST(1.4983070769),
- COEF_CONST(1.5422108254),
- COEF_CONST(1.5874010520),
- COEF_CONST(1.6339154532),
- COEF_CONST(1.6817928305),
- COEF_CONST(1.7310731220),
- COEF_CONST(1.7817974363),
- COEF_CONST(1.8340080864),
- COEF_CONST(1.8877486254),
- COEF_CONST(1.9430638823)
-};
-#endif
-
-void drc_decode(drc_info *drc, real_t *spec)
-{
- uint16_t i, bd, top;
-#ifdef FIXED_POINT
- int32_t exp, frac;
-#else
- real_t factor, exp;
-#endif
- uint16_t bottom = 0;
-
- if (drc->num_bands == 1)
- drc->band_top[0] = 1024/4 - 1;
-
- for (bd = 0; bd < drc->num_bands; bd++)
- {
- top = 4 * (drc->band_top[bd] + 1);
-
-#ifndef FIXED_POINT
- /* Decode DRC gain factor */
- if (drc->dyn_rng_sgn[bd]) /* compress */
- exp = -drc->ctrl1 * (drc->dyn_rng_ctl[bd] - (DRC_REF_LEVEL - drc->prog_ref_level))/REAL_CONST(24.0);
- else /* boost */
- exp = drc->ctrl2 * (drc->dyn_rng_ctl[bd] - (DRC_REF_LEVEL - drc->prog_ref_level))/REAL_CONST(24.0);
- factor = (real_t)pow(2.0, exp);
-
- /* Apply gain factor */
- for (i = bottom; i < top; i++)
- spec[i] *= factor;
-#else
- /* Decode DRC gain factor */
- if (drc->dyn_rng_sgn[bd]) /* compress */
- {
- exp = -1 * (drc->dyn_rng_ctl[bd] - (DRC_REF_LEVEL - drc->prog_ref_level))/ 24;
- frac = -1 * (drc->dyn_rng_ctl[bd] - (DRC_REF_LEVEL - drc->prog_ref_level)) % 24;
- } else { /* boost */
- exp = (drc->dyn_rng_ctl[bd] - (DRC_REF_LEVEL - drc->prog_ref_level))/ 24;
- frac = (drc->dyn_rng_ctl[bd] - (DRC_REF_LEVEL - drc->prog_ref_level)) % 24;
- }
-
- /* Apply gain factor */
- if (exp < 0)
- {
- for (i = bottom; i < top; i++)
- {
- spec[i] >>= -exp;
- if (frac)
- spec[i] = MUL_R(spec[i],drc_pow2_table[frac+23]);
- }
- } else {
- for (i = bottom; i < top; i++)
- {
- spec[i] <<= exp;
- if (frac)
- spec[i] = MUL_R(spec[i],drc_pow2_table[frac+23]);
- }
- }
-#endif
-
- bottom = top;
- }
-}
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