| /* Track.java -- A track of MIDI events |
| Copyright (C) 2005, 2012 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath 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 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package javax.sound.midi; |
| |
| import java.util.HashSet; |
| import java.util.Vector; |
| |
| /** |
| * A Track contains a list of timecoded MIDI events for processing |
| * by a Sequencer. |
| * |
| * @author Anthony Green (green@redhat.com) |
| * @since 1.3 |
| * |
| */ |
| public class Track |
| { |
| /** |
| * The list of MidiEvents for this track. |
| */ |
| Vector<MidiEvent> events = new Vector<MidiEvent>(); |
| |
| // A HashSet to speed processing |
| private HashSet<MidiEvent> eventSet = new HashSet<MidiEvent>(); |
| |
| // This is only instantiable within this package. |
| Track() |
| { |
| } |
| |
| /** |
| * Add a new event to this track. Specific events may only be added once. |
| * The event will be inserted into the appropriate spot in the event list |
| * based on its timecode. |
| * |
| * @param event the event to add |
| * @return true if the event was added, false otherwise |
| */ |
| public boolean add(MidiEvent event) |
| { |
| synchronized (events) |
| { |
| if (eventSet.contains(event)) |
| return false; |
| |
| eventSet.add(event); |
| |
| long targetTick = event.getTick(); |
| int i = events.size() - 1; |
| while (i >= 0 && (events.get(i).getTick() > targetTick)) |
| i--; |
| events.add(i+1, event); |
| return true; |
| } |
| } |
| |
| /** |
| * Remove an event from this track. |
| * |
| * @param event the event to remove |
| * @return true if the event was removed, false otherwise |
| */ |
| public boolean remove(MidiEvent event) |
| { |
| synchronized (events) |
| { |
| if (! eventSet.remove(event)) |
| return false; |
| |
| int i = events.indexOf(event); |
| if (i >= 0) |
| { |
| events.remove(i); |
| return true; |
| } |
| |
| throw new InternalError("event in set but not list"); |
| } |
| } |
| |
| /** |
| * Get an event idetified by its order index |
| * |
| * @param index the location of the event to get |
| * @return the event at index |
| * @throws ArrayIndexOutOfBoundsException if index is out of bounds |
| */ |
| public MidiEvent get(int index) throws ArrayIndexOutOfBoundsException |
| { |
| synchronized (events) |
| { |
| try |
| { |
| return events.get(index); |
| } |
| catch (IndexOutOfBoundsException e) |
| { |
| throw (ArrayIndexOutOfBoundsException) |
| new ArrayIndexOutOfBoundsException().initCause(e); |
| } |
| } |
| } |
| |
| |
| /** |
| * Get the number events in this track. |
| * |
| * @return the number of events in this track |
| */ |
| public int size() |
| { |
| return events.size(); |
| } |
| |
| /** |
| * Get the length of the track in MIDI ticks. |
| * |
| * @return the length of the track in MIDI ticks |
| */ |
| public long ticks() |
| { |
| synchronized (events) |
| { |
| int size = events.size(); |
| return events.get(size - 1).getTick(); |
| } |
| } |
| } |