Marsyas  0.6.0-alpha
/usr/src/RPM/BUILD/marsyas-0.6.0/src/marsyas/marsystems/ADRessStereoSpectrum.cpp
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00001 /*
00002 ** Copyright (C) 1998-2011 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 "ADRessStereoSpectrum.h"
00021 
00022 
00023 using std::ostringstream;
00024 using namespace Marsyas;
00025 
00026 ADRessStereoSpectrum::ADRessStereoSpectrum(mrs_string name):MarSystem("ADRessStereoSpectrum", name)
00027 {
00028   addControls();
00029 }
00030 
00031 ADRessStereoSpectrum::ADRessStereoSpectrum(const ADRessStereoSpectrum& a) : MarSystem(a)
00032 {
00033 
00034 }
00035 
00036 ADRessStereoSpectrum::~ADRessStereoSpectrum()
00037 {
00038 }
00039 
00040 MarSystem*
00041 ADRessStereoSpectrum::clone() const
00042 {
00043   return new ADRessStereoSpectrum(*this);
00044 }
00045 
00046 void
00047 ADRessStereoSpectrum::addControls()
00048 {
00049 }
00050 
00051 void
00052 ADRessStereoSpectrum::myUpdate(MarControlPtr sender)
00053 {
00054   MRSDIAG("ADRessStereoSpectrum.cpp - ADRessStereoSpectrum:myUpdate");
00055 
00056   (void) sender;  //suppress warning of unused parameter(s)
00057 
00058   N2_ = ctrl_inObservations_->to<mrs_natural>()/2; //i.e. N/2+1
00059 
00060   ctrl_onSamples_->setValue(1, NOUPDATE);
00061   ctrl_onObservations_->setValue(N2_, NOUPDATE);
00062   ctrl_osrate_->setValue(ctrl_israte_, NOUPDATE);
00063 
00064   ostringstream oss;
00065   for (mrs_natural n=0; n < N2_; n++)
00066     oss << "ADRess_stereobin_" << n << ",";
00067   ctrl_onObsNames_->setValue(oss.str(), NOUPDATE);
00068 
00069   beta_ = ctrl_inSamples_->to<mrs_natural>()-2;
00070 }
00071 
00072 void
00073 ADRessStereoSpectrum::myProcess(realvec& in, realvec& out)
00074 {
00075   mrs_natural o,t;
00076   for(o=0; o < N2_; ++o)
00077   {
00078     //look for the maximum in the azimuth plane
00079     //NOTE: first column of input is dedicated to bin phases...
00080     maxVal_ = 0.0;
00081     maxIndex_ = beta_;
00082     for(t=0; t<=beta_; ++t)
00083     {
00084       if(in(o,t+1) > maxVal_)//AZl
00085       {
00086         maxVal_ = in(o,t+1);
00087         maxIndex_ = t;
00088       }
00089       if(in(N2_+o, t+1) > maxVal_)//AZr
00090       {
00091         maxVal_ = in(N2_+o,t+1);
00092         maxIndex_ = beta_*2+1-t;
00093       }
00094     }
00095 
00096     //avoid two indexes for center panning
00097     if(maxIndex_ > beta_)
00098       maxIndex_--;
00099 
00100     //convert panning index to range [-1,1]
00101     //and save it to corresponding output
00102     out(o,0) = (mrs_real)maxIndex_/(beta_*2.0)*2.0 - 1.0;
00103   }
00104 
00105   // MATLAB_PUT(out, "ADRessBinPan");
00106   // MATLAB_EVAL("figure(3);plot(ADRessBinPan);");
00107 }