adamstark@46: //=======================================================================
adamstark@46: /** @file BTrack.h
adamstark@47:  *  @brief BTrack - a real-time beat tracker
adamstark@46:  *  @author Adam Stark
adamstark@46:  *  @copyright Copyright (C) 2008-2014  Queen Mary University of London
adamstark@46:  *
adamstark@46:  * This program is free software: you can redistribute it and/or modify
adamstark@46:  * it under the terms of the GNU General Public License as published by
adamstark@46:  * the Free Software Foundation, either version 3 of the License, or
adamstark@46:  * (at your option) any later version.
adamstark@46:  *
adamstark@46:  * This program is distributed in the hope that it will be useful,
adamstark@46:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
adamstark@46:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
adamstark@46:  * GNU General Public License for more details.
adamstark@46:  *
adamstark@46:  * You should have received a copy of the GNU General Public License
adamstark@46:  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
adamstark@46:  */
adamstark@46: //=======================================================================
adamstark@46: 
adamstark@46: #ifndef __BTRACK_H
adamstark@46: #define __BTRACK_H
adamstark@46: 
adamstark@46: //#include "fftw3.h"
adamstark@46: 
adamstark@46: class BTrack {
adamstark@46: 	
adamstark@46: public:
adamstark@46: 	BTrack();				// constructor
adamstark@46: 	~BTrack();				// destructor	
adamstark@46: 	
adamstark@46: 	void initialise(int fsize);
adamstark@46: 	void process(float df_sample);
adamstark@46: 	void plotdfbuffer();
adamstark@46: 	void updatecumscore(float df_sample);
adamstark@46: 	void predictbeat();
adamstark@46: 	void dfconvert();
adamstark@46: 	void calcTempo();
adamstark@46: 	void adapt_thresh(float x[],int N);
adamstark@46: 	float mean_array(float array[],int start,int end);
adamstark@46: 	void normalise(float array[],int N);
adamstark@46: 	void acf_bal(float df_thresh[]);
adamstark@46: 	void getrcfoutput();
adamstark@46: 	void settempo(float tempo);
adamstark@46: 	void fixtempo(float tempo);
adamstark@46: 	void unfixtempo();
adamstark@46: 	
adamstark@46: 	int playbeat;
adamstark@46: 	float cscoreval;
adamstark@46: 	float est_tempo;
adamstark@46: 			
adamstark@46: private:
adamstark@46: 	
adamstark@46: 	// buffers
adamstark@46: 	float *dfbuffer;			// to hold detection function
adamstark@46: 	float df512[512];			// to hold resampled detection function 
adamstark@46: 	float *cumscore;			// to hold cumulative score
adamstark@46: 	
adamstark@46: 	float acf[512];				// to hold autocorrelation function
adamstark@46: 	
adamstark@46: 	float wv[128];				// to hold weighting vector
adamstark@46: 	
adamstark@46: 	float rcf[128];				// to hold comb filter output
adamstark@46: 	float t_obs[41];			// to hold tempo version of comb filter output
adamstark@46: 	
adamstark@46: 	float delta[41];			// to hold final tempo candidate array
adamstark@46: 	float prev_delta[41];		// previous delta
adamstark@46: 	float prev_delta_fix[41];	// fixed tempo version of previous delta
adamstark@46: 	
adamstark@46: 	float t_tmat[41][41];		// transition matrix
adamstark@46: 	
adamstark@46: 	
adamstark@46: 	// parameters
adamstark@46: 	float tightness;
adamstark@46: 	float alpha;
adamstark@46: 	float bperiod;
adamstark@46: 	float tempo;
adamstark@46: 	
adamstark@46: 	
adamstark@46: 	float p_fact;
adamstark@46: 	
adamstark@46: 	
adamstark@46: 	//
adamstark@46: 	int m0;				// indicates when the next point to predict the next beat is
adamstark@46: 	int beat;
adamstark@46: 	
adamstark@46: 	int dfbuffer_size;
adamstark@46: 		
adamstark@46: 	
adamstark@46: 	int framesize;
adamstark@46: 	
adamstark@46: 	
adamstark@46: 	int tempofix;
adamstark@46: 	
adamstark@46: 
adamstark@46: };
adamstark@46: 
adamstark@46: #endif