Marsyas  0.6.0-alpha
/usr/src/RPM/BUILD/marsyas-0.6.0/src/marsyas/marsystems/Whitening.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 "Whitening.h"
00020 
00021 using std::ostringstream;
00022 using namespace Marsyas;
00023 
00024 Whitening::Whitening(mrs_string name):MarSystem("Whitening", name)
00025 {
00026 }
00027 
00028 Whitening::Whitening(const Whitening& a) : MarSystem(a)
00029 {
00030 }
00031 
00032 Whitening::~Whitening()
00033 {
00034 }
00035 
00036 MarSystem*
00037 Whitening::clone() const
00038 {
00039   return new Whitening(*this);
00040 }
00041 
00042 void
00043 Whitening::addControls()
00044 {
00045 }
00046 
00047 void
00048 Whitening::myUpdate(MarControlPtr sender)
00049 {
00050   MarSystem::myUpdate(sender);
00051 }
00052 
00053 
00054 void
00055 Whitening::myProcess(realvec& in, realvec& out)
00056 {
00057   mrs_natural o,t;
00058   mrs_natural inObservations = getctrl("mrs_natural/inObservations")->to<mrs_natural>();
00059   mrs_real a;
00060 
00061   for (t = 0; t < inSamples_; t++)
00062   {
00063     for (o=0; o < inObservations; o=o+2)
00064     {
00065       a = sqrt( (in(o,t)*in(o,t)) + (in(o+1,t)*in(o+1,t) ));
00066       if (a>0) {
00067         out(o,t) = in(o,t)/a;
00068         out(o+1,t) = in(o+1,t)/a;
00069       }
00070       else {
00071         out(o,t)=0;
00072         out(o+1,t)=0;
00073       }
00074     }
00075   }
00076 }