Chris@19: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@19: 
Chris@42: /*
Chris@42:     Tipic
Chris@42: 
Chris@42:     Centre for Digital Music, Queen Mary, University of London.
Chris@42: 
Chris@42:     This program is free software; you can redistribute it and/or
Chris@42:     modify it under the terms of the GNU General Public License as
Chris@42:     published by the Free Software Foundation; either version 2 of the
Chris@42:     License, or (at your option) any later version.  See the file
Chris@42:     COPYING included with this distribution for more information.
Chris@42: */
Chris@42: 
Chris@19: #ifndef CRP_H
Chris@19: #define CRP_H
Chris@19: 
Chris@19: #include "Types.h"
Chris@26: #include "DCTReduce.h"
Chris@19: 
Chris@57: /**
Chris@57:  * Turn features obtained from a PitchFilterbank into timbre-invariant
Chris@57:  * pitch chroma (CRP) features. No downsampling/smoothing is applied.
Chris@57:  *
Chris@57:  * This class retains no internal history, so a single instance could
Chris@57:  * be used for multiple channels at once, interleaved, within a single
Chris@57:  * thread. It is not thread-safe.
Chris@57:  */
Chris@19: class CRP
Chris@19: {
Chris@19: public:
Chris@19:     struct Parameters {
Chris@19: 	int coefficientsToDrop;
Chris@19: 	bool applyLogCompression;
Chris@24:         double logFactor;
Chris@24:         double logAddTerm;
Chris@26:         int normP; // 0 = no normalisation, 1 = L^1, 2 = L^2
Chris@25:         double normThresh;
Chris@24: 	Parameters() :
Chris@25:             coefficientsToDrop(55),
Chris@24:             applyLogCompression(true),
Chris@24:             logFactor(1000.0),
Chris@24:             logAddTerm(1.0),
Chris@25:             normP(2),
Chris@25:             normThresh(1e-6)
Chris@24:         { }
Chris@19:     };
Chris@19: 	
Chris@26:     CRP(Parameters params);
Chris@19:     ~CRP();
Chris@19: 
Chris@58:     /**
Chris@58:      * Process a block as produced by PitchFilterbank.
Chris@58:      */
Chris@19:     RealBlock process(const RealBlock &in);
Chris@58: 
Chris@58:     /**
Chris@58:      * Process a single column.
Chris@58:      */
Chris@58:     RealColumn process(RealColumn col);
Chris@19:     
Chris@19: private:
Chris@19:     Parameters m_params;
Chris@26:     DCTReduce m_dctReduce;
Chris@19: };
Chris@19: 
Chris@19: #endif
Chris@19: