- // Searches the sequence for NoteOn and NoteOff events
- noteOns = new ArrayList(tracks[i].size() / 2);
- noteOffs = new ArrayList(tracks[i].size() / 2);
- for (int j = 0; j < tracks[i].size(); j++) {
- event = tracks[i].get(j);
- if (event.getMessage().getStatus() >= 144 &&
- event.getMessage().getStatus() < 160) noteOns.add(event);
- if (event.getMessage().getStatus() >= 128 &&
- event.getMessage().getStatus() < 144) noteOffs.add(event);
- }
- noteOns.trimToSize();
- noteOffs.trimToSize();
- boolean isEmpty = (noteOns.size() == 0);
- String text = "Track " + i + " has " + noteOns.size() + "/" + noteOffs.size() + "/" + tracks[i].size();
- if (isEmpty) {
- text += " and will be removed.";
- emptyTracks.add(tracks[i]);
- }
- System.out.println(text);
-
- // Sorts the note lists by tick position.
- Comparator c = new Comparator() {
- public int compare(Object o1, Object o2) {
- return (int)(((MidiEvent)o1).getTick() - ((MidiEvent)o2).getTick());
- }
- };
- Collections.sort(noteOns, c);
- Collections.sort(noteOffs, c);
-
- // For each NoteOn event, finds its NoteOff event and replaces it with a MooNote.
- Iterator iOn = noteOns.iterator(), iOff;
- MidiEvent on, off = null, nextOff;
- ShortMessage onMsg, nextOffMsg;
- while(iOn.hasNext()) {
- on = (MidiEvent)iOn.next();
- onMsg = (ShortMessage)on.getMessage();
- iOff = noteOffs.iterator();
- while(iOff.hasNext()) {
- nextOff = (MidiEvent)iOff.next();
- nextOffMsg = (ShortMessage)nextOff.getMessage();
- if(onMsg.getChannel() == nextOffMsg.getChannel() &&
- onMsg.getData1() == nextOffMsg.getData1() &&
- c.compare(nextOff, on) > 0) {
- off = nextOff;
- iOff.remove();
- break;
- }
-
- }
- tracks[i].remove(on);
- if (off != null) {
- tracks[i].add(new MooNote(on, off));
- } else {
- tracks[i].add(new MooNote(on));
- }
- iOn.remove();
- }