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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/javax/sound/midi/Track.java | |
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Diffstat (limited to 'libjava/classpath/javax/sound/midi/Track.java')
-rw-r--r-- | libjava/classpath/javax/sound/midi/Track.java | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/libjava/classpath/javax/sound/midi/Track.java b/libjava/classpath/javax/sound/midi/Track.java new file mode 100644 index 000000000..550d2e1c4 --- /dev/null +++ b/libjava/classpath/javax/sound/midi/Track.java @@ -0,0 +1,164 @@ +/* Track.java -- A track of MIDI events + Copyright (C) 2005 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 events = new Vector(); + + // A HashSet to speed processing + private HashSet eventSet = new HashSet(); + + // 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 && (((MidiEvent)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 (MidiEvent) 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 ((MidiEvent) events.get(size - 1)).getTick(); + } + } + } |