Marsyas  0.6.0-alpha
/usr/src/RPM/BUILD/marsyas-0.6.0/src/marsyas/marsystems/Normalize.cpp
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00001 /*
00002 ** Copyright (C) 1998-2006 George Tzanetakis <gtzan@cs.uvic.ca>
00003 **
00004 ** This program is free software; you can redistribute it and/or modify
00005 ** it under the terms of the GNU General Public License as published by
00006 ** the Free Software Foundation; either version 2 of the License, or
00007 ** (at your option) any later version.
00008 **
00009 ** This program is distributed in the hope that it will be useful,
00010 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
00011 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012 ** GNU General Public License for more details.
00013 **
00014 ** You should have received a copy of the GNU General Public License
00015 ** along with this program; if not, write to the Free Software
00016 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00017 */
00018 
00019 #include "Normalize.h"
00020 
00021 using std::ostringstream;
00022 using namespace Marsyas;
00023 
00024 Normalize::Normalize(mrs_string name):MarSystem("Normalize",name)
00025 {
00026 }
00027 
00028 Normalize::~Normalize()
00029 {
00030 }
00031 
00032 MarSystem*
00033 Normalize::clone() const
00034 {
00035   return new Normalize(*this);
00036 }
00037 
00038 void
00039 Normalize::myProcess(realvec& in, realvec& out)
00040 {
00041   mrs_real rms = 0.0;
00042   mrs_natural t,o;
00043 
00044   for (t = 0; t < inSamples_; t++)
00045   {
00046     rms = 0.0;
00047     // calculate 2-norm
00048     for (o=0; o < inObservations_; o++)
00049     {
00050       rms += (in(o,t) * in(o,t));
00051     }
00052     rms = sqrt(rms);
00053     // normalize
00054     for (o=0; o < inObservations_; o++)
00055     {
00056       out(o,t) = in(o,t) / rms;
00057     }
00058   }
00059 }