diff options
Diffstat (limited to 'faad2/src/libfaad/is.c')
| -rw-r--r-- | faad2/src/libfaad/is.c | 109 |
1 files changed, 0 insertions, 109 deletions
diff --git a/faad2/src/libfaad/is.c b/faad2/src/libfaad/is.c deleted file mode 100644 index e6186a6..0000000 --- a/faad2/src/libfaad/is.c +++ /dev/null @@ -1,109 +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: is.c,v 1.28 2007/11/01 12:33:31 menno Exp $
-**/
-
-#include "common.h"
-#include "structs.h"
-
-#include "syntax.h"
-#include "is.h"
-
-#ifdef FIXED_POINT
-static real_t pow05_table[] = {
- COEF_CONST(1.68179283050743), /* 0.5^(-3/4) */
- COEF_CONST(1.41421356237310), /* 0.5^(-2/4) */
- COEF_CONST(1.18920711500272), /* 0.5^(-1/4) */
- COEF_CONST(1.0), /* 0.5^( 0/4) */
- COEF_CONST(0.84089641525371), /* 0.5^(+1/4) */
- COEF_CONST(0.70710678118655), /* 0.5^(+2/4) */
- COEF_CONST(0.59460355750136) /* 0.5^(+3/4) */
-};
-#endif
-
-void is_decode(ic_stream *ics, ic_stream *icsr, real_t *l_spec, real_t *r_spec,
- uint16_t frame_len)
-{
- uint8_t g, sfb, b;
- uint16_t i;
-#ifndef FIXED_POINT
- real_t scale;
-#else
- int32_t exp, frac;
-#endif
-
- uint16_t nshort = frame_len/8;
- uint8_t group = 0;
-
- for (g = 0; g < icsr->num_window_groups; g++)
- {
- /* Do intensity stereo decoding */
- for (b = 0; b < icsr->window_group_length[g]; b++)
- {
- for (sfb = 0; sfb < icsr->max_sfb; sfb++)
- {
- if (is_intensity(icsr, g, sfb))
- {
-#ifdef MAIN_DEC
- /* For scalefactor bands coded in intensity stereo the
- corresponding predictors in the right channel are
- switched to "off".
- */
- ics->pred.prediction_used[sfb] = 0;
- icsr->pred.prediction_used[sfb] = 0;
-#endif
-
-#ifndef FIXED_POINT
- scale = (real_t)pow(0.5, (0.25*icsr->scale_factors[g][sfb]));
-#else
- exp = icsr->scale_factors[g][sfb] >> 2;
- frac = icsr->scale_factors[g][sfb] & 3;
-#endif
-
- /* Scale from left to right channel,
- do not touch left channel */
- for (i = icsr->swb_offset[sfb]; i < min(icsr->swb_offset[sfb+1], ics->swb_offset_max); i++)
- {
-#ifndef FIXED_POINT
- r_spec[(group*nshort)+i] = MUL_R(l_spec[(group*nshort)+i], scale);
-#else
- if (exp < 0)
- r_spec[(group*nshort)+i] = l_spec[(group*nshort)+i] << -exp;
- else
- r_spec[(group*nshort)+i] = l_spec[(group*nshort)+i] >> exp;
- r_spec[(group*nshort)+i] = MUL_C(r_spec[(group*nshort)+i], pow05_table[frac + 3]);
-#endif
- if (is_intensity(icsr, g, sfb) != invert_intensity(ics, g, sfb))
- r_spec[(group*nshort)+i] = -r_spec[(group*nshort)+i];
- }
- }
- }
- group++;
- }
- }
-}
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