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Diffstat (limited to 'src/libfaad/drc.c')
| -rw-r--r-- | src/libfaad/drc.c | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/src/libfaad/drc.c b/src/libfaad/drc.c deleted file mode 100644 index ef4b6a96e..000000000 --- a/src/libfaad/drc.c +++ /dev/null @@ -1,170 +0,0 @@ -/* -** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding -** Copyright (C) 2003-2004 M. Bakker, Ahead Software 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. -** -** Commercial non-GPL licensing of this software is possible. -** For more info contact Ahead Software through Mpeg4AAClicense@nero.com. -** -** $Id: drc.c,v 1.7 2005/10/29 23:57:06 tmmm 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; - } -} |