/usr/include/CLAM/CircularPeaksToPCP.hxx is in libclam-dev 1.4.0-5.2.
This file is owned by root:root, with mode 0o644.
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* Copyright (c) 2001-2006 MUSIC TECHNOLOGY GROUP (MTG)
* UNIVERSITAT POMPEU FABRA
*
*
* 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
*
*/
#ifndef CircularPeaksToPCP_hxx
#define CircularPeaksToPCP_hxx
#include <list>
#include <vector>
#include <cmath>
namespace Simac
{
/**
* This processing constructs a PCP doing the weighted histogram
* of the energy of a set of circular chromatic peaks.
* It sums the energy of each peak to the corresponding pitch.
* If windowing is activated by calling activateWindowing(),
* then peaks on the center of the pitch get more relevance
* while peaks in between the center of two pitch are attenuated.
*/
class CircularPeaksToPCP
{
public:
typedef std::vector<std::pair<double, double> > PeakList;
typedef std::vector<double> PCP;
private:
PCP _output;
bool _windowingActivated;
static const unsigned nSemitones=12;
public:
CircularPeaksToPCP()
{
_output.resize(nSemitones);
_windowingActivated=false;
}
~CircularPeaksToPCP()
{
}
void activateWindowing()
{
_windowingActivated=true;
}
static double windowedValue(double position, double value)
{
return value* (0.54 - 0.46*std::cos(2*M_PI*(position+.5)));
}
void doIt(const PeakList & peaks)
{
for (unsigned i=0; i<nSemitones; i++)
_output[i]=0;
const unsigned nPeaks=peaks.size();
for (unsigned i=0; i<nPeaks; i++)
{
int quantizedSemitone = int(peaks[i].first + .5);
unsigned semitone = (quantizedSemitone+nSemitones)%nSemitones;
if (_windowingActivated)
_output[semitone] += windowedValue(peaks[i].first,peaks[i].second);
else
_output[semitone] += peaks[i].second;
}
}
const PCP & output() const
{
return _output;
}
};
} // namespace Simac
#endif// CircularPeaksToPCP_hxx
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