diff dsp/onsets/DetectionFunction.h @ 225:49844bc8a895

* Queen Mary C++ DSP library

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dsp/onsets/DetectionFunction.h	Wed Apr 05 17:35:59 2006 +0000
@@ -0,0 +1,72 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    QM DSP Library
+
+    Centre for Digital Music, Queen Mary, University of London.
+    This file copyright 2005-2006 Christian Landone.
+    All rights reserved.
+*/
+
+#ifndef DETECTIONFUNCTION_H
+#define DETECTIONFUNCTION_H
+
+#include "dsp/maths/MathUtilities.h"
+#include "dsp/maths/MathAliases.h"
+#include "dsp/phasevocoder/PhaseVocoder.h"
+#include "base/Window.h"
+
+#define DF_HFC (1)
+#define DF_SPECDIFF (2)
+#define DF_PHASEDEV (3)
+#define DF_COMPLEXSD (4)
+
+struct DFConfig{
+    double stepSecs; // DF step in seconds
+    unsigned int stepSize; // DF step in samples
+    unsigned int frameLength; // DF analysis window - usually 2*step
+    int DFType; // type of detection function ( see defines )
+};
+
+class DetectionFunction  
+{
+public:
+    double* getSpectrumMagnitude();
+    DetectionFunction( DFConfig Config );
+    virtual ~DetectionFunction();
+    double process( double* TDomain );
+
+private:
+    double HFC( unsigned int length, double* src);
+    double specDiff( unsigned int length, double* src);
+    double phaseDev(unsigned int length, double *srcMagnitude, double *srcPhase);
+    double complexSD(unsigned int length, double *srcMagnitude, double *srcPhase);
+	
+private:
+    void initialise( DFConfig Config );
+    void deInitialise();
+
+    int m_DFType;
+    unsigned int m_dataLength;
+    unsigned int m_halfLength;
+
+    double* magHistory;
+    double* phaseHistory;
+    double* phaseHistoryOld;
+
+    double* m_DFWindowedFrame; // Array for windowed analysis frame
+    double* m_magnitude; // Magnitude of analysis frame ( frequency domain )
+    double* m_thetaAngle;// Phase of analysis frame ( frequency domain )
+
+
+    vector < ComplexData > meas ;
+	
+    ComplexData j;
+
+    Window<double> *m_window;
+
+    PhaseVocoder*	m_phaseVoc;	// Phase Vocoder
+
+};
+
+#endif