Chris@2: /*
Chris@2: 	Copyright (C) 2001, 2006 by Simon Dixon
Chris@2: 
Chris@2: 	This program is free software; you can redistribute it and/or modify
Chris@2: 	it under the terms of the GNU General Public License as published by
Chris@2: 	the Free Software Foundation; either version 2 of the License, or
Chris@2: 	(at your option) any later version.
Chris@2: 
Chris@2: 	This program is distributed in the hope that it will be useful,
Chris@2: 	but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@2: 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Chris@2: 	GNU General Public License for more details.
Chris@2: 
Chris@2: 	You should have received a copy of the GNU General Public License along
Chris@2: 	with this program (the file gpl.txt); if not, download it from
Chris@2: 	http://www.gnu.org/licenses/gpl.txt or write to the
Chris@2: 	Free Software Foundation, Inc.,
Chris@2: 	51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Chris@2: */
Chris@2: 
Chris@2: package at.ofai.music.util;
Chris@2: 
Chris@2: public class ConstantTempoMap implements TempoMap {
Chris@2: 	
Chris@2: 	protected double interBeatInterval;
Chris@2: 
Chris@2: 	public ConstantTempoMap(double bpm) {
Chris@2: 		interBeatInterval = 60 / bpm;
Chris@2: 	} // constructor
Chris@2: 
Chris@2: 	public ConstantTempoMap() {
Chris@2: 		this(120);
Chris@2: 	} // default constructor
Chris@2: 
Chris@2: 	public void add(double time, double tempo) {
Chris@2: 		throw new RuntimeException("ConstantTempoMap: cannot change tempo");
Chris@2: 	} // add()
Chris@2: 		
Chris@2: 	public double toRealTime(double value) {
Chris@2: 		return value * interBeatInterval;
Chris@2: 	} // toRealTime()
Chris@2: 
Chris@2: 	public double toScoreTime(double value) {
Chris@2: 		return value / interBeatInterval;
Chris@2: 	} // toScoreTime()
Chris@2: 
Chris@2: 	public static void main(String[] args) { // unit test
Chris@2: 		TempoMap mtm = new ConstantTempoMap(100);
Chris@2: 		System.out.println(mtm.toRealTime(1));
Chris@2: 		System.out.println(mtm.toScoreTime(mtm.toRealTime(1)));
Chris@2: 		System.out.println(mtm.toScoreTime(4));
Chris@2: 		System.out.println(mtm.toRealTime(mtm.toScoreTime(4)));
Chris@2: 		mtm.add(5, 120);
Chris@2: 	} // main()
Chris@2: 
Chris@2: } // ConstantTempoMap