Chris@26: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@26: 
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@26: #ifndef CHROMA_H
Chris@26: #define CHROMA_H
Chris@26: 
Chris@26: #include "Types.h"
Chris@26: 
Chris@57: /**
Chris@57:  * Turn features obtained from a PitchFilterbank into pitch chroma
Chris@57:  * features (without the timbre-invariant DCT step used for CRP
Chris@57:  * 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@26: class Chroma
Chris@26: {
Chris@26: public:
Chris@26:     struct Parameters {
Chris@26: 	bool applyLogCompression;
Chris@26: 	double logFactor;
Chris@26: 	double logAddTerm;
Chris@26:         int normP; // 0 = no normalisation, 1 = L^1, 2 = L^2
Chris@26:         double normThresh;
Chris@26: 	Parameters() :
Chris@26:             applyLogCompression(false),
Chris@26:             logFactor(100.0),
Chris@26:             logAddTerm(1.0),
Chris@26:             normP(2),
Chris@26:             normThresh(1e-6)
Chris@26:         { }
Chris@26:     };
Chris@26: 
Chris@35:     Chroma(Parameters params);
Chris@26:     ~Chroma();
Chris@26: 
Chris@26:     RealBlock process(const RealBlock &in);
Chris@26: 
Chris@26: private:
Chris@26:     Parameters m_params;
Chris@26: };
Chris@26: 
Chris@26: #endif
Chris@26: