Marsyas  0.2
/home/gperciva/src/marsyas/src/marsyas/RemoveObservations.cpp
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.h" 
00020 #include "RemoveObservations.h"
00021 
00022 using std::ostringstream;
00023 using namespace Marsyas;
00024 
00025 RemoveObservations::RemoveObservations(mrs_string name) : MarSystem("RemoveObservations", name)
00026 {
00028     addControls();
00029     lowestObs_ = 0;
00030     numObs_ = inObservations_;
00031 }
00032 
00033 RemoveObservations::RemoveObservations(const RemoveObservations& a) : MarSystem(a)
00034 {
00035     lowestObs_ = 0;
00036     numObs_ = inObservations_;
00037 }
00038 
00039 
00040 RemoveObservations::~RemoveObservations()
00041 {
00042 }
00043 
00044 MarSystem*
00045 RemoveObservations::clone() const
00046 {
00047     return new RemoveObservations(*this);
00048 }
00049 
00050 void
00051 RemoveObservations::addControls()
00052 {
00054 
00055     addctrl("mrs_real/lowCutoff", 0.0);
00056     addctrl("mrs_real/highCutoff", 1.0);
00057 
00058 }
00059 
00060 void
00061 RemoveObservations::myUpdate(MarControlPtr sender)
00062 {
00063     MRSDIAG("RemoveObservations.cpp - RemoveObservations:myUpdate");
00064 
00065     MarSystem::myUpdate(sender);
00066 
00067     // round down is the default with C math
00068     lowestObs_ = inObservations_
00069             * getctrl("mrs_real/lowCutoff")->to<mrs_real>();
00070     // round up with ceil()
00071     numObs_ = ceil( inObservations_
00072             * getctrl("mrs_real/highCutoff")->to<mrs_real>()
00073             ) - lowestObs_;
00074 
00075     ctrl_onObservations_->setValue(numObs_, NOUPDATE);
00076 
00077     // remove unused observation names, so they don't
00078     // overwrite other observations from other parts
00079     // of the network
00080     mrs_string names = ctrl_inObsNames_->to<mrs_string>();
00081     int lowNamePos = 0;
00082     int highNamePos = 0;
00083     for (int i=0; i < lowestObs_; i++) {
00084         lowNamePos = names.find(",", lowNamePos) + 1;
00085     }
00086     for (int i=0; i < numObs_; i++) {
00087         highNamePos = names.find(",", highNamePos) + 1;
00088     }
00089     if (highNamePos > 0) {
00090         names = names.substr(lowNamePos, highNamePos);
00091         ctrl_onObsNames_->setValue(names, NOUPDATE);
00092     }
00093 }
00094 
00095 void
00096 RemoveObservations::myProcess(realvec& in, realvec& out)
00097 {
00098     mrs_natural t,o;
00099 
00101     for (o = 0; o < numObs_; o++)
00102     {
00103         for (t = 0; t < inSamples_; t++)
00104         {
00105             out(o, t) = in(o+lowestObs_, t);
00106         }
00107     }
00108 }