ssr.h

00001 /*
00002 ** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
00003 ** Copyright (C) 2003-2005 M. Bakker, Ahead Software AG, http://www.nero.com
00004 **  
00005 ** This program is free software; you can redistribute it and/or modify
00006 ** it under the terms of the GNU General Public License as published by
00007 ** the Free Software Foundation; either version 2 of the License, or
00008 ** (at your option) any later version.
00009 ** 
00010 ** This program is distributed in the hope that it will be useful,
00011 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013 ** GNU General Public License for more details.
00014 ** 
00015 ** You should have received a copy of the GNU General Public License
00016 ** along with this program; if not, write to the Free Software 
00017 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00018 **
00019 ** Any non-GPL usage of this software or parts of this software is strictly
00020 ** forbidden.
00021 **
00022 ** Software using this code must display the following message visibly in the
00023 ** software:
00024 ** "FAAD2 AAC/HE-AAC/HE-AACv2/DRM decoder (c) Ahead Software, www.nero.com"
00025 ** in, for example, the about-box or help/startup screen.
00026 **
00027 ** Commercial non-GPL licensing of this software is possible.
00028 ** For more info contact Ahead Software through [email protected].
00029 **
00030 ** $Id: ssr.h,v 1.2 2005/11/01 21:41:43 gabest Exp $
00031 **/
00032 
00033 #ifndef __SSR_H__
00034 #define __SSR_H__
00035 
00036 #ifdef __cplusplus
00037 extern "C" {
00038 #endif
00039 
00040 #define SSR_BANDS 4
00041 #define PQFTAPS 96
00042 
00043 void ssr_decode(ssr_info *ssr, fb_info *fb, uint8_t window_sequence,
00044                 uint8_t window_shape, uint8_t window_shape_prev,
00045                 real_t *freq_in, real_t *time_out, real_t *overlap,
00046                 real_t ipqf_buffer[SSR_BANDS][96/4],
00047                 real_t *prev_fmd, uint16_t frame_len);
00048 
00049 
00050 static void ssr_gain_control(ssr_info *ssr, real_t *data, real_t *output,
00051                              real_t *overlap, real_t *prev_fmd, uint8_t band,
00052                              uint8_t window_sequence, uint16_t frame_len);
00053 static void ssr_gc_function(ssr_info *ssr, real_t *prev_fmd,
00054                             real_t *gc_function, uint8_t window_sequence,
00055                             uint16_t frame_len);
00056 
00057 
00058 #ifdef __cplusplus
00059 }
00060 #endif
00061 #endif

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