c@225: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
c@225: 
c@225: /*
c@225:     QM DSP Library
c@225: 
c@225:     Centre for Digital Music, Queen Mary, University of London.
c@225:     This file copyright 2006 Martin Gasser.
c@309: 
c@309:     This program is free software; you can redistribute it and/or
c@309:     modify it under the terms of the GNU General Public License as
c@309:     published by the Free Software Foundation; either version 2 of the
c@309:     License, or (at your option) any later version.  See the file
c@309:     COPYING included with this distribution for more information.
c@225: */
c@225: 
cannam@489: #ifndef QM_DSP_CHANGEDETECTIONFUNCTION_H
cannam@489: #define QM_DSP_CHANGEDETECTIONFUNCTION_H
c@225: 
c@225: #include "TCSgram.h"
c@225: 
c@225: #include <valarray>
c@225: 
cannam@493: typedef std::valarray<double> ChangeDistance;
c@225: 
c@225: struct ChangeDFConfig
c@225: {
cannam@482:     int smoothingWidth;
c@225: };
c@225: 
c@225: class ChangeDetectionFunction
c@225: {
c@225: public:
cannam@482:     ChangeDetectionFunction(ChangeDFConfig);
cannam@482:     ~ChangeDetectionFunction();
cannam@482:     ChangeDistance process(const TCSGram& rTCSGram);
c@225: private:
cannam@482:     void setFilterWidth(const int iWidth);
cannam@482:         
c@225: private:
cannam@493:     std::valarray<double> m_vaGaussian;
cannam@482:     double m_dFilterSigma;
cannam@482:     int m_iFilterWidth;
c@225: };
c@225: 
c@225: #endif // _CHANGDETECTIONFUNCTION_