cannam@0: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
cannam@0: 
cannam@0: /*
cannam@0:     QM DSP Library
cannam@0: 
cannam@0:     Centre for Digital Music, Queen Mary, University of London.
cannam@0:     This file copyright 2006 Martin Gasser.
cannam@0:     All rights reserved.
cannam@0: */
cannam@0: 
cannam@0: #ifndef _CHANGEDETECTIONFUNCTION_
cannam@0: #define _CHANGEDETECTIONFUNCTION_
cannam@0: 
cannam@50: //#define DEBUG_CHANGE_DETECTION_FUNCTION 1
cannam@0: 
cannam@0: #include "TCSgram.h"
cannam@0: 
cannam@0: #include <valarray>
cannam@0: using std::valarray;
cannam@0: 
cannam@0: typedef	valarray<double> ChangeDistance;
cannam@0: 
cannam@0: struct ChangeDFConfig
cannam@0: {
cannam@0: 	int smoothingWidth;
cannam@0: };
cannam@0: 
cannam@0: class ChangeDetectionFunction
cannam@0: {
cannam@0: public:
cannam@0: 	ChangeDetectionFunction(ChangeDFConfig);
cannam@0: 	~ChangeDetectionFunction();
cannam@0: 	ChangeDistance process(const TCSGram& rTCSGram);
cannam@0: private:
cannam@0: 	void setFilterWidth(const int iWidth);
cannam@0: 	
cannam@0: private:
cannam@0: 	valarray<double> m_vaGaussian;
cannam@0: 	double m_dFilterSigma;
cannam@0: 	int m_iFilterWidth;
cannam@0: };
cannam@0: 
cannam@0: #endif // _CHANGDETECTIONFUNCTION_