Marsyas  0.6.0-alpha
/usr/src/RPM/BUILD/marsyas-0.6.0/src/marsyas/marsystems/Upsample.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 "Upsample.h"
00020 #include <iostream>
00021 
00022 using namespace std;
00023 using namespace Marsyas;
00024 
00025 Upsample::Upsample(mrs_string name):MarSystem("Upsample",name)
00026 {
00027   addControls();
00028 }
00029 
00030 Upsample::~Upsample()
00031 {
00032 }
00033 
00034 MarSystem*
00035 Upsample::clone() const
00036 {
00037   return new Upsample(*this);
00038 }
00039 
00040 void
00041 Upsample::addControls()
00042 {
00043   addctrl("mrs_real/default", 0.0);
00044   addctrl("mrs_natural/factor", 2);
00045   addctrl("mrs_string/interpolation", "none");
00046   getControl("mrs_natural/factor")->setState(true);
00047 }
00048 
00049 
00050 
00051 void
00052 Upsample::myUpdate(MarControlPtr sender)
00053 {
00054   (void) sender;  //suppress warning of unused parameter(s)
00055   mrs_natural factor = getctrl("mrs_natural/factor")->to<mrs_natural>();
00056   mrs_natural onSamples = (mrs_natural)(mrs_real)(ctrl_inSamples_->to<mrs_natural>() * factor);
00057   ctrl_onSamples_->setValue(onSamples, NOUPDATE);
00058   ctrl_osrate_->setValue(ctrl_israte_->to<mrs_real>() / factor, NOUPDATE);
00059 }
00060 
00061 void
00062 Upsample::myProcess(realvec& in, realvec& out)
00063 {
00064   //checkFlow(in,out);
00065   mrs_natural factor = getctrl("mrs_natural/factor")->to<mrs_natural>();
00066   mrs_natural inSamples = getctrl("mrs_natural/inSamples")->to<mrs_natural>();
00067   mrs_string interpolation = getctrl("mrs_string/interpolation")->to<mrs_string>();
00068   //updControl("mrs_natural/osRate", getctrl("mrs_natural/isRate")/factor);
00069   //if (getctrl("mrs_natural/onSamples")->to<mrs_natural>() !=(inSamples*factor)) {
00070   //    updControl("mrs_natural/onSamples", inSamples*factor);
00071   //}
00072 
00073   // Set default values
00074   if (getctrl("mrs_real/default")->to<mrs_real>() != 0.0) {
00075     for (mrs_natural t=0; t < inSamples*factor; t++)
00076     {
00077       out(0,t)=getctrl("mrs_real/default")->to<mrs_real>();;
00078     }
00079   }
00080 
00081   // Get actual values
00082   for (mrs_natural t=0; t < inSamples; t++)
00083   {
00084     // no interpolation
00085     if (interpolation=="none") {
00086       out(0,t*factor) = in(0,t);
00087     }
00088     if (interpolation=="repeat") {
00089       for (mrs_natural k=(t*factor); k<((t+1)*factor); k++) {
00090         out(0,k)=in(0,t);
00091       }
00092     }
00093   }
00094 }
00095