Marsyas  0.6.0-alpha
/usr/src/RPM/BUILD/marsyas-0.6.0/src/marsyas/marsystems/MaxMin.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 
00020 #include "MaxMin.h"
00021 using std::ostringstream;
00022 using namespace Marsyas;
00023 
00024 MaxMin::MaxMin(mrs_string name): MarSystem("MaxMin",name)
00025 {
00026 }
00027 
00028 MaxMin::~MaxMin()
00029 {
00030 }
00031 
00032 MarSystem*
00033 MaxMin::clone() const
00034 {
00035   return new MaxMin(*this);
00036 }
00037 
00038 void
00039 MaxMin::myUpdate(MarControlPtr sender)
00040 {
00041   // Start with the default MarSystem setup with equal input/output
00042   // stream format ...
00043   MarSystem::myUpdate(sender);
00044 
00045   // ... but change the number and rate of output samples.
00046   setControl("mrs_natural/onSamples",  (mrs_natural)2);
00047   setControl("mrs_real/osrate",
00048              getControl("mrs_real/israte")->to<mrs_real>() / getControl("mrs_natural/inSamples")->to<mrs_natural>()
00049             );
00050 }
00051 
00052 void
00053 MaxMin::myProcess(realvec& in, realvec& out)
00054 {
00055   mrs_natural t,o;
00056   for (o=0; o < inObservations_; o++)
00057   {
00058     max_ = -1.0 * DBL_MAX;
00059     min_ = DBL_MAX;
00060     for (t=0; t < inSamples_; t++)
00061     {
00062       if (in(o,t) > max_)
00063       {
00064         max_ = in(o,t);
00065       }
00066       if (in(o,t) < min_)
00067       {
00068         min_ = in(o,t);
00069       }
00070     }
00071     out(o,0) = max_;
00072     out(o,1) = min_;
00073   }
00074 }