Source code: jmms/MSCycle.java
1 /*
2 <This Java Class is part of the jMusic API version 1.4, February 2003.>
3
4 Copyright (C) 2000 Andrew Sorensen & Andrew Brown
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or any
9 later version.
10 This program is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public Licens
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19 package jmms;
20
21 import jm.music.data.*;
22 import java.awt.*;
23 import java.awt.event.ActionEvent;
24
25 /**
26 * MSCycle.java
27 * This class is for making it easy to play looped music via MIDI in realtime.
28 * You just give it a score and it keeps on looping.
29 * If you want it to change the looped music, then you give it a different score.
30 * The tempo can be changed independently of the score.
31 * Created on 11 March 2003, 14:17
32 * @author RenŽ Wooller and Andrew Brown
33 */
34 public class MSCycle extends Thread{
35
36 private double tempo = 120.0;
37 private Score score;
38 // MIDIshare sequencer object
39 private Sequencer seq = new Sequencer();
40 // Looping flag
41 private boolean playing = true;
42
43 /**
44 * to create an MSCycle with the default score of a one beat long note
45 */
46 public MSCycle() {
47 this(new Score(new Part(new Phrase(new Note(60, 1.0, 120)))));
48 }
49
50 /** Creates a new instance of MSCycle, with a specific score for it to
51 * play.
52 * @param scoreToSet The jMusic Score to be looped.
53 */
54 public MSCycle(Score scoreToSet) {
55 this(scoreToSet, true);
56 }
57
58 /** Creates a new instance of MSCycle, with a specific score for it to
59 * play.
60 * @param scoreToSet The jMusic Score to be looped.
61 * @param playing Wheather or not the score should start immediatly.
62 */
63 public MSCycle(Score scoreToSet, boolean playing) {
64 this.playing = playing;
65 setScore(scoreToSet);
66 tempo = score.getTempo();
67 this.setPriority(Thread.MAX_PRIORITY - 1);
68 this.start();
69 }
70
71 /** To run the thread. */
72 public void run() {
73 while (playing) {
74 seq.play(score);
75 try {
76 Thread.sleep((int)(1000 * score.getEndTime() * 60.0/tempo));
77 } catch( InterruptedException e) {}
78 }
79 }
80
81 /** Use this to set the new score. */
82 public void setScore(Score toSet) {
83 score = toSet.copy();
84 }
85
86 /**
87 * Use this to set the tempo.
88 * @param newTempo The tempo for subsequent repeats.
89 */
90 public void setTempo(double newTempo) {
91 tempo = newTempo;
92 seq.setTempo(tempo);
93 }
94
95 /**
96 * Halt the score looping.
97 */
98 public void stopPlayback() {
99 playing = false;
100 }
101
102 /**
103 * Start or Restart the score looping.
104 */
105 public void startPlayback() {
106 playing = true;
107 }
108 }
109