comparison src/BTrack.h @ 12:c87f667abd68 master v0.9.0

flow: Merged <release> 'v0.9.0' to <master> ('master').

+//=======================================================================
+/** @file BTrack.h
+ *  @brief BTrack - a real-time beat tracker
+ *  @author Adam Stark
+ *  @copyright Copyright (C) 2008-2014  Queen Mary University of London
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+//=======================================================================
+
+#ifndef __BTRACK_H
+#define __BTRACK_H
+
+//#include "fftw3.h"
+
+class BTrack {
+	
+public:
+	BTrack();				// constructor
+	~BTrack();				// destructor	
+	
+	void initialise(int fsize);
+	void process(float df_sample);
+	void plotdfbuffer();
+	void updatecumscore(float df_sample);
+	void predictbeat();
+	void dfconvert();
+	void calcTempo();
+	void adapt_thresh(float x[],int N);
+	float mean_array(float array[],int start,int end);
+	void normalise(float array[],int N);
+	void acf_bal(float df_thresh[]);
+	void getrcfoutput();
+	void settempo(float tempo);
+	void fixtempo(float tempo);
+	void unfixtempo();
+	
+	int playbeat;
+	float cscoreval;
+	float est_tempo;
+			
+private:
+	
+	// buffers
+	float *dfbuffer;			// to hold detection function
+	float df512[512];			// to hold resampled detection function 
+	float *cumscore;			// to hold cumulative score
+	
+	float acf[512];				// to hold autocorrelation function
+	
+	float wv[128];				// to hold weighting vector
+	
+	float rcf[128];				// to hold comb filter output
+	float t_obs[41];			// to hold tempo version of comb filter output
+	
+	float delta[41];			// to hold final tempo candidate array
+	float prev_delta[41];		// previous delta
+	float prev_delta_fix[41];	// fixed tempo version of previous delta
+	
+	float t_tmat[41][41];		// transition matrix
+	
+	
+	// parameters
+	float tightness;
+	float alpha;
+	float bperiod;
+	float tempo;
+	
+	
+	float p_fact;
+	
+	
+	//
+	int m0;				// indicates when the next point to predict the next beat is
+	int beat;
+	
+	int dfbuffer_size;
+		
+	
+	int framesize;
+	
+	
+	int tempofix;
+	
+
+};
+
+#endif