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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/javax/sound/midi/Track.java
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+/* 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();
+ }
+ }
+ }