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von raredesign | Dez 3, 2019 | Allgemein | 0 Kommentare
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| Current Path : /proc/self/root/usr/include/CLAM/ |
| Current File : //proc/self/root/usr/include/CLAM/SemitoneCenterFinder.hxx |
/*
* 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 SemitoneCenterFinder_hxx
#define SemitoneCenterFinder_hxx
#include <list>
#include <vector>
#include <cmath>
namespace Simac
{
class SemitoneCenterFinder
{
public:
typedef std::vector<std::pair<double, double> > PeakList;
private:
unsigned _histogramSize;
unsigned * _histogram;
unsigned _binsPerSemitone;
public:
SemitoneCenterFinder()
{
_binsPerSemitone = 3;
_histogramSize = 30;
_histogram = new unsigned[_histogramSize];
for (unsigned int i=0; i<_histogramSize; i++)
_histogram[i]=0;
}
~SemitoneCenterFinder()
{
delete [] _histogram;
}
void doIt(unsigned int nPeaks, const double * peakPositions, const double * peakValues)
{
for (unsigned int i=0; i<nPeaks; i++)
{
double semitonePosition = std::fmod(peakPositions[i],_binsPerSemitone);
unsigned histogramBin=semitonePosition*_histogramSize/_binsPerSemitone+0.5;
_histogram[histogramBin]++;
}
}
double output()
{
unsigned maxPos=0;
unsigned maxOcurrences=0;
for (unsigned int i=0; i<_histogramSize; i++)
{
if (_histogram[i]<=maxOcurrences) continue;
maxOcurrences=_histogram[i];
maxPos=i;
}
return maxPos*_binsPerSemitone/float(_histogramSize);
}
};
} // namespace Simac
#endif// SemitoneCenterFinder_hxx
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