Marsyas  0.6.0-alpha
/usr/src/RPM/BUILD/marsyas-0.6.0/src/marsyas/marsystems/PowerToAverageRatio.cpp
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00001 /*
00002 ** Copyright (C) 1998-2010 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 "../common_source.h"
00020 #include "PowerToAverageRatio.h"
00021 
00022 using std::ostringstream;
00023 using namespace Marsyas;
00024 
00025 PowerToAverageRatio::PowerToAverageRatio(mrs_string name) : MarSystem("PowerToAverageRatio", name)
00026 {
00028   addControls();
00029 }
00030 
00031 PowerToAverageRatio::PowerToAverageRatio(const PowerToAverageRatio& a) : MarSystem(a)
00032 {
00033 }
00034 
00035 
00036 PowerToAverageRatio::~PowerToAverageRatio()
00037 {
00038 }
00039 
00040 MarSystem*
00041 PowerToAverageRatio::clone() const
00042 {
00043   return new PowerToAverageRatio(*this);
00044 }
00045 
00046 void
00047 PowerToAverageRatio::addControls()
00048 {
00050 
00051 }
00052 
00053 void
00054 PowerToAverageRatio::myUpdate(MarControlPtr sender)
00055 {
00056   MRSDIAG("PowerToAverageRatio.cpp - PowerToAverageRatio:myUpdate");
00057 
00059   MarSystem::myUpdate(sender);
00060 
00061   // overwrite default settings as needed
00062   ctrl_onSamples_->setValue((mrs_natural)1, NOUPDATE);
00063 
00064   // Add prefix to the observation names.
00065   mrs_string inObsNames = ctrl_inObsNames_->to<mrs_string>();
00066   ctrl_onObsNames_->setValue(obsNamesAddPrefix(inObsNames, "PowerToAverageRatio_"), NOUPDATE);
00067 }
00068 
00069 void
00070 PowerToAverageRatio::myProcess(realvec& in, realvec& out)
00071 {
00072   mrs_natural t,o;
00073 
00075   for (o = 0; o < inObservations_; o++)
00076   {
00077     mrs_real samp_max = 0.0;
00078     mrs_real rms = 0.0;
00079     for (t = 0; t < inSamples_; t++)
00080     {
00081       mrs_real samp_abs = fabs(in(o,t));
00082       if (samp_max < samp_abs)
00083         samp_max = samp_abs;
00084       rms += samp_abs*samp_abs;
00085     }
00086     if (inSamples_ > 0)
00087       rms = sqrt( rms/inSamples_ );
00088 
00089     if (rms != 0)
00090       out(o,0) = samp_max / rms;
00091     else
00092       out(o,0) = 0.0;
00093   }
00094 }