Marsyas  0.6.0-alpha
/usr/src/RPM/BUILD/marsyas-0.6.0/src/marsyas/marsystems/Peak2Rms.cpp
Go to the documentation of this file.
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 "Peak2Rms.h"
00020 
00021 using std::ostringstream;
00022 using namespace Marsyas;
00023 
00024 Peak2Rms::Peak2Rms(mrs_string name):MarSystem("Peak2Rms", name)
00025 {
00026 }
00027 
00028 Peak2Rms::Peak2Rms(const Peak2Rms& a) : MarSystem(a)
00029 {
00030 }
00031 
00032 Peak2Rms::~Peak2Rms()
00033 {
00034 }
00035 
00036 MarSystem*
00037 Peak2Rms::clone() const
00038 {
00039   return new Peak2Rms(*this);
00040 }
00041 
00042 void
00043 Peak2Rms::myUpdate(MarControlPtr sender)
00044 {
00045   (void) sender;  //suppress warning of unused parameter(s)
00046   setctrl("mrs_natural/onObservations",1);
00047   setctrl("mrs_natural/onSamples",1);
00048   setctrl("mrs_real/osRate", israte_ / inSamples_);
00049 }
00050 
00051 void
00052 Peak2Rms::myProcess(realvec& in, realvec& out)
00053 {
00054   mrs_real peak = in.maxval();
00055   mrs_real rms = 0.0;
00056   mrs_natural t;
00057 
00058   for (t = 0; t < inSamples_; t++)
00059   {
00060     rms += in(0,t) * in(0,t);
00061   }
00062   rms /= inSamples_;
00063   rms = sqrt(rms);
00064   out(0) = peak/rms;
00065 }