86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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/*
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QM DSP Library
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Centre for Digital Music, Queen Mary, University of London.
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This file 2005-2006 Christian Landone.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version. See the file
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COPYING included with this distribution for more information.
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*/
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#ifndef DETECTIONFUNCTION_H
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#define DETECTIONFUNCTION_H
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#include "maths/MathUtilities.h"
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#include "maths/MathAliases.h"
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#include "dsp/phasevocoder/PhaseVocoder.h"
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#include "base/Window.h"
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#define DF_HFC (1)
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#define DF_SPECDIFF (2)
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#define DF_PHASEDEV (3)
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#define DF_COMPLEXSD (4)
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#define DF_BROADBAND (5)
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struct DFConfig{
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unsigned int stepSize; // DF step in samples
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unsigned int frameLength; // DF analysis window - usually 2*step
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int DFType; // type of detection function ( see defines )
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double dbRise; // only used for broadband df (and required for it)
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bool adaptiveWhitening; // perform adaptive whitening
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double whiteningRelaxCoeff; // if < 0, a sensible default will be used
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double whiteningFloor; // if < 0, a sensible default will be used
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};
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class DetectionFunction
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{
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public:
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double* getSpectrumMagnitude();
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DetectionFunction( DFConfig Config );
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virtual ~DetectionFunction();
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double process( const double* TDomain );
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double process( const double* magnitudes, const double* phases );
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private:
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void whiten();
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double runDF();
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double HFC( unsigned int length, double* src);
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double specDiff( unsigned int length, double* src);
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double phaseDev(unsigned int length, double *srcPhase);
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double complexSD(unsigned int length, double *srcMagnitude, double *srcPhase);
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double broadband(unsigned int length, double *srcMagnitude);
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private:
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void initialise( DFConfig Config );
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void deInitialise();
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int m_DFType;
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unsigned int m_dataLength;
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unsigned int m_halfLength;
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unsigned int m_stepSize;
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double m_dbRise;
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bool m_whiten;
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double m_whitenRelaxCoeff;
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double m_whitenFloor;
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double* m_magHistory;
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double* m_phaseHistory;
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double* m_phaseHistoryOld;
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double* m_magPeaks;
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double* m_DFWindowedFrame; // Array for windowed analysis frame
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double* m_magnitude; // Magnitude of analysis frame ( frequency domain )
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double* m_thetaAngle;// Phase of analysis frame ( frequency domain )
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Window<double> *m_window;
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PhaseVocoder* m_phaseVoc; // Phase Vocoder
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};
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#endif
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