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1: /* Track.java -- A track of MIDI events 2: Copyright (C) 2005 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath 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, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: 39: package javax.sound.midi; 40: 41: import java.util.HashSet; 42: import java.util.Vector; 43: 44: /** 45: * A Track contains a list of timecoded MIDI events for processing 46: * by a Sequencer. 47: * 48: * @author Anthony Green (green@redhat.com) 49: * @since 1.3 50: * 51: */ 52: public class Track 53: { 54: /** 55: * The list of MidiEvents for this track. 56: */ 57: protected Vector events; 58: 59: // A HashSet to speed processing 60: private HashSet eventSet; 61: 62: /** 63: * Add a new event to this track. Specific events may only be added once. 64: * The event will be inserted into the appropriate spot in the event list 65: * based on its timecode. 66: * 67: * @param event the event to add 68: * @return true if the event was added, false otherwise 69: */ 70: public boolean add(MidiEvent event) 71: { 72: synchronized (events) 73: { 74: if (eventSet.contains(event)) 75: return false; 76: 77: eventSet.add(event); 78: 79: long targetTick = event.getTick(); 80: int i = events.size() - 1; 81: while (i >= 0 && (((MidiEvent)events.get(i)).getTick() > targetTick)) 82: i--; 83: events.add(i+1, event); 84: return true; 85: } 86: } 87: 88: /** 89: * Remove an event from this track. 90: * 91: * @param event the event to remove 92: * @return true if the event was removed, false otherwise 93: */ 94: public boolean remove(MidiEvent event) 95: { 96: synchronized (events) 97: { 98: if (! eventSet.remove(event)) 99: return false; 100: 101: int i = events.indexOf(event); 102: if (i >= 0) 103: { 104: events.remove(i); 105: return true; 106: } 107: 108: throw new InternalError("event in set but not list"); 109: } 110: } 111: 112: /** 113: * Get an event idetified by its order index 114: * 115: * @param index the location of the event to get 116: * @return the event at index 117: * @throws ArrayIndexOutOfBoundsException if index is out of bounds 118: */ 119: public MidiEvent get(int index) throws ArrayIndexOutOfBoundsException 120: { 121: synchronized (events) 122: { 123: try 124: { 125: return (MidiEvent) events.get(index); 126: } 127: catch (IndexOutOfBoundsException e) 128: { 129: throw (ArrayIndexOutOfBoundsException) 130: new ArrayIndexOutOfBoundsException().initCause(e); 131: } 132: } 133: } 134: 135: 136: /** 137: * Get the number events in this track. 138: * 139: * @return the number of events in this track 140: */ 141: public int size() 142: { 143: return events.size(); 144: } 145: 146: /** 147: * Get the length of the track in MIDI ticks. 148: * 149: * @return the length of the track in MIDI ticks 150: */ 151: public long ticks() 152: { 153: synchronized (events) 154: { 155: int size = events.size(); 156: return ((MidiEvent) events.get(size - 1)).getTick(); 157: } 158: } 159: }
GNU Classpath (0.20) |