diff src/btrack_plus/OnsetDetectionFunction.h @ 0:3dcbd77efc94

added files for OF project

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/btrack_plus/OnsetDetectionFunction.h	Fri Sep 21 16:35:17 2012 +0100
@@ -0,0 +1,88 @@
+/*
+ *  OnsetDetectionFunction.h
+ *  
+ *
+ *  Created by Adam Stark on 22/03/2011.
+ *  Copyright 2011 Queen Mary University of London. All rights reserved.
+ *
+ */
+
+#ifndef __RTONSETDF_H
+#define __RTONSETDF_H
+
+//#include "fftw3.h"
+#include "accFFT.h"
+
+typedef double fft_complex[2];
+
+class OnsetDetectionFunction
+{
+public:
+	OnsetDetectionFunction();																// Constructor
+	OnsetDetectionFunction(int arg_hsize,int arg_fsize,int arg_df_type,int arg_win_type);	// Constructor (with arguments)
+	~OnsetDetectionFunction();																// Destructor
+	void initialise(int arg_hsize,int arg_fsize,int arg_df_type,int arg_win_type);			// Initialisation Function
+	
+	double getDFsample(double inputbuffer[]);												// process input buffer and calculate detection function sample
+	void set_df_type(int arg_df_type);														// set the detection function type
+	
+private:
+	
+	void perform_FFT();																		// perform the FFT on the data in 'frame'
+
+	double energy_envelope();																// calculate energy envelope detection function sample
+	double energy_difference();																// calculate energy difference detection function sample
+	double spectral_difference();															// calculate spectral difference detection function sample
+	double spectral_difference_hwr();														// calculate spectral difference (half wave rectified) detection function sample
+	double phase_deviation();																// calculate phase deviation detection function sample
+	double complex_spectral_difference();													// calculate complex spectral difference detection function sample
+	double complex_spectral_difference_hwr();												// calculate complex spectral difference detection function sample (half-wave rectified)
+	double high_frequency_content();														// calculate high frequency content detection function sample
+	double high_frequency_spectral_difference();											// calculate high frequency spectral difference detection function sample
+	double high_frequency_spectral_difference_hwr();										// calculate high frequency spectral difference detection function sample (half-wave rectified)
+
+	void set_win_rectangular();																// calculate a Rectangular window	
+	void set_win_hanning();																	// calculate a Hanning window
+	void set_win_hamming();																	// calculate a Hamming window
+	void set_win_blackman();																// calculate a Blackman window
+	void set_win_tukey();																	// calculate a Tukey window
+
+	
+	double princarg(double phaseval);														// set phase values between [-pi, pi]
+	
+	
+	double pi;																				// pi, the constant
+	
+	int framesize;																			// audio framesize
+	int hopsize;																			// audio hopsize	
+	int df_type;																			// type of detection function
+	
+    accFFT *fft;
+    fft_complex *out;
+    double *in;
+    
+	//fftw_plan p;																			// create fft plan
+	//fftw_complex *in;																		// to hold complex fft values for input
+	//fftw_complex *out;																		// to hold complex fft values for output
+    
+	
+	int initialised;																		// flag indicating whether buffers and FFT plans have been initialised
+	
+
+	double *frame;																			// audio frame
+	double *window;																			// window
+	double *wframe;																			// windowed frame
+	
+	double energy_sum_old;																	// to hold the previous energy sum value
+	
+	double *mag;																			// magnitude spectrum
+	double *mag_old;																		// previous magnitude spectrum
+	
+	double *phase;																			// FFT phase values
+	double *phase_old;																		// previous phase values
+	double *phase_old_2;																	// second order previous phase values
+
+};
+
+
+#endif
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