Marsyas  0.6.0-alpha
/usr/src/RPM/BUILD/marsyas-0.6.0/src/marsyas/marsystems/NormalizeAbs.cpp
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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_source.h"
00020 #include "NormalizeAbs.h"
00021 
00022 using std::ostringstream;
00023 using namespace Marsyas;
00024 
00025 NormalizeAbs::NormalizeAbs(mrs_string name) : MarSystem("NormalizeAbs", name)
00026 {
00028   addControls();
00029 }
00030 
00031 NormalizeAbs::NormalizeAbs(const NormalizeAbs& a) : MarSystem(a)
00032 {
00035   ctrl_target_ = getctrl("mrs_real/target");
00036 }
00037 
00038 
00039 NormalizeAbs::~NormalizeAbs()
00040 {
00041 }
00042 
00043 MarSystem*
00044 NormalizeAbs::clone() const
00045 {
00046   return new NormalizeAbs(*this);
00047 }
00048 
00049 void
00050 NormalizeAbs::addControls()
00051 {
00053 
00054   addctrl("mrs_real/target", 1.0, ctrl_target_);
00055 
00056 }
00057 
00058 void
00059 NormalizeAbs::myUpdate(MarControlPtr sender)
00060 {
00061   MRSDIAG("NormalizeAbs.cpp - NormalizeAbs:myUpdate");
00062 
00064   MarSystem::myUpdate(sender);
00065 }
00066 
00067 void
00068 NormalizeAbs::myProcess(realvec& in, realvec& out)
00069 {
00070   mrs_natural t,o;
00071   const mrs_real& target = ctrl_target_->to<mrs_real>();
00072 
00074   for (o = 0; o < inObservations_; o++)
00075   {
00076     // find maximum value
00077     mrs_real max_val = 0.0;
00078     for (t = 0; t < inSamples_; t++)
00079       if (max_val < fabs(in(o,t)))
00080         max_val = fabs(in(o,t));
00081     mrs_real gain = 0.0;
00082     if (max_val > 0)
00083       gain = target / max_val;
00084     for (t = 0; t < inSamples_; t++)
00085       out(o, t) = gain * in(o, t);
00086   }
00087 }