/home/marsyas/marsyas/src/marsyas/PWMSource.cpp

/*
** Copyright (C) 1998-2006 George Tzanetakis <gtzan@cs.uvic.ca>
**  
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
** 
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
** GNU General Public License for more details.
** 
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software 
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

#include "PWMSource.h"

using namespace std;
using namespace Marsyas;
    
PWMSource::PWMSource(mrs_string name):MarSystem("PWMSource",name)
{
  //type_ = "PWMSource";
  //name_ = name;
    
    addControls();


}

PWMSource::~PWMSource()
{
}

MarSystem* 
PWMSource::clone() const 
{
  return new PWMSource(*this);
}

void 
PWMSource::addControls()
{
  addctrl("mrs_real/frequency", 440.0);
  addctrl("mrs_real/duty_cicle", 0.5);
}

void
PWMSource::myUpdate(MarControlPtr sender)
{

//   setctrl("mrs_natural/onSamples", getctrl("mrs_natural/inSamples"));
//   setctrl("mrs_natural/onObservations", getctrl("mrs_natural/inObservations"));
//   setctrl("mrs_real/osrate", getctrl("mrs_real/israte"));
    MarSystem::myUpdate(sender);
}

void 
PWMSource::myProcess(realvec &in, realvec &out)
{
    (void) in;
   
    mrs_real frequency = (getctrl("mrs_real/frequency")->to<mrs_real>());
    mrs_real duty =  getctrl("mrs_real/duty_cicle")->to<mrs_real>();
    mrs_real irate = (getctrl("mrs_real/israte")->to<mrs_real>());
  mrs_real incr = frequency / irate;
  mrs_natural inSamples = getctrl("mrs_natural/inSamples")->to<mrs_natural>();

//  cout << "f=" << frequency;
//  cout << "d=" << duty;
//  cout << "irate=" << irate;
//  cout << "deltaphase=" << incr;
//  cout << "insamples=" << inSamples;


    for (mrs_natural t=0; t < inSamples; t++)
    {
        out(0,t)=0;
        phase += incr;
        if (phase>duty) {
            out(0,t) = 0;
        }    else {
            out(0,t) = 1;
        }
        if (phase>1) {
            phase=0;
        }
    }
}



//00053 void 
//00054 NoiseSource::myProcess(realvec &in, realvec &out)
//00055 {
//00056     for (mrs_natural t=0; t < inSamples_; t++)
//00057         out(t) = (mrs_real)(2.0 * rand() / (RAND_MAX + 1.0) )-1;
//00058 }
//00059 
//00060 
//00061 

    

---