Marsyas  0.6.0-alpha
/usr/src/RPM/BUILD/marsyas-0.6.0/src/marsyas/marsystems/Rms.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 "Rms.h"
00020 
00021 using namespace std;
00022 using namespace Marsyas;
00023 
00024 Rms::Rms(mrs_string name):MarSystem("Rms",name)
00025 {
00026   //type_ = "Rms";
00027   //name_ = name;
00028 }
00029 
00030 Rms::~Rms()
00031 {
00032 }
00033 
00034 MarSystem*
00035 Rms::clone() const
00036 {
00037   return new Rms(*this);
00038 }
00039 
00040 void
00041 Rms::myUpdate(MarControlPtr sender)
00042 {
00043   (void) sender;  //suppress warning of unused parameter(s)
00044   setctrl("mrs_natural/onSamples", (mrs_natural)1);
00045   ctrl_onObservations_->setValue(ctrl_inObservations_, NOUPDATE);
00046   setctrl("mrs_real/osrate", getctrl("mrs_real/israte")->to<mrs_real>() / getctrl("mrs_natural/inSamples")->to<mrs_natural>());
00047   // Add prefix to the observation names.
00048   mrs_string inObsNames = ctrl_inObsNames_->to<mrs_string>();
00049   ctrl_onObsNames_->setValue(obsNamesAddPrefix(inObsNames, "Rms_"), NOUPDATE);
00050 }
00051 
00052 void
00053 Rms::myProcess(realvec& in, realvec& out)
00054 {
00055   mrs_natural t;
00056   mrs_natural o;
00057   mrs_real val;
00058   mrs_real rmsEnergy;
00059 
00060   for (o = 0; o < inObservations_; o++) {
00061     rmsEnergy = 0.0;
00062     for (t = 0; t < inSamples_; t++) {
00063       val = in(o, t);
00064       rmsEnergy += (val * val);
00065     }
00066     if (rmsEnergy != 0.0)
00067     {
00068       rmsEnergy /= inSamples_;
00069       rmsEnergy = sqrt(rmsEnergy);
00070     }
00071     out(o, 0) = (mrs_real) rmsEnergy;
00072   }
00073 }