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author | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2003-08-30 22:30:28 +0000 |
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committer | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2003-08-30 22:30:28 +0000 |
commit | 32063c433915b8dddd143a951ad90ae901ac1b38 (patch) | |
tree | 88aaee983b0885b5bb22d870476f7afdaa8a7010 /libfaad2/ms.c | |
parent | 264633eec589baddfdcd79dde08fd7f1f47fba51 (diff) | |
download | mpv-32063c433915b8dddd143a951ad90ae901ac1b38.tar.bz2 mpv-32063c433915b8dddd143a951ad90ae901ac1b38.tar.xz |
libfaad2 v2.0rc1 imported
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@10726 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libfaad2/ms.c')
-rw-r--r-- | libfaad2/ms.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/libfaad2/ms.c b/libfaad2/ms.c new file mode 100644 index 0000000000..8b2c023207 --- /dev/null +++ b/libfaad2/ms.c @@ -0,0 +1,74 @@ +/* +** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding +** Copyright (C) 2003 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: ms.c,v 1.5 2003/07/29 08:20:12 menno Exp $ +**/ + +#include "common.h" +#include "structs.h" + +#include "syntax.h" +#include "ms.h" +#include "is.h" +#include "pns.h" + +void ms_decode(ic_stream *ics, ic_stream *icsr, real_t *l_spec, real_t *r_spec, + uint16_t frame_len) +{ + uint8_t g, b, sfb; + uint8_t group = 0; + uint16_t nshort = frame_len/8; + + uint16_t i, k; + real_t tmp; + + if (ics->ms_mask_present >= 1) + { + for (g = 0; g < ics->num_window_groups; g++) + { + for (b = 0; b < ics->window_group_length[g]; b++) + { + for(sfb = 0; sfb < ics->max_sfb; sfb++) + { + /* If intensity stereo coding or noise substitution is on + for a particular scalefactor band, no M/S stereo decoding + is carried out. + */ + if ((ics->ms_used[g][sfb] || ics->ms_mask_present == 2) && + !is_intensity(icsr, g, sfb) && !is_noise(ics, g, sfb)) + { + for (i = ics->swb_offset[sfb]; i < ics->swb_offset[sfb+1]; i++) + { + k = (group*nshort) + i; + tmp = l_spec[k] - r_spec[k]; + l_spec[k] = l_spec[k] + r_spec[k]; + r_spec[k] = tmp; + } + } + } + group++; + } + } + } +} |