- // Searches the sequence for NoteOn events
- Track[] tracks = seq.getTracks();
- MidiEvent noteOn, noteOff = null, nextEvent;
- MidiMessage nextMsg;
- ShortMessage shortMsg;
- for (int i = 0; i < tracks.length; i++) {
- for (int j = 0; j < tracks[i].size(); j++) {
- noteOn = tracks[i].get(j);
- if (noteOn.getMessage() instanceof ShortMessage) {
- if (((ShortMessage)noteOn.getMessage()).getCommand() == ShortMessage.NOTE_ON) {
- // Finds the corresponding NoteOff event
- for (int k = j + 1; k < tracks[i].size(); k++) {
- nextEvent = tracks[i].get(k);
- nextMsg = nextEvent.getMessage();
- if (nextMsg instanceof ShortMessage) {
- shortMsg = (ShortMessage) nextMsg;
- if (shortMsg.getCommand() == ShortMessage.NOTE_OFF && shortMsg.getChannel() == ((ShortMessage)noteOn.getMessage()).getChannel() && shortMsg.getData1() == ((ShortMessage)noteOn.getMessage()).getData1()) {
- noteOff = nextEvent;
- break;
- }
- }
- }
- // Replaces the NoteOn event with a MooNote, if possible with the corresponding NoteOff event
- tracks[i].remove(noteOn);
- if (noteOff != null) {
- tracks[i].add(new MooNote(noteOn, noteOff));
- } else {
- tracks[i].add(new MooNote(noteOn));
- }
+ // Corrects any overflows.
+ if (ticks > ticksPerBeat) {
+ beats += Math.floor(ticks / ticksPerBeat);
+ ticks = ticks % ticksPerBeat;
+ }
+ if (beats > beatsPerMeasure) {
+ measures += Math.floor(beats / beatsPerMeasure);
+ beats = beats % beatsPerMeasure;
+ }
+
+ // Returns the calculated values.
+ int[] pos = {(int)measures, (int)beats, (int)ticks};
+ return pos;
+ }
+
+ /**
+ * Calculates the tick position in the current sequence for the given position (measures, beats, ticks).
+ * @param measures the measure of the current position
+ * @param beats the beat of the current position
+ * @param tick the tick of the current position
+ * @return the tick position.
+ */
+ public static long getTicksForPosition(int measures, int beats, int ticks) {
+ int res = seq.getResolution();
+ int[] lastTSPos = new int[3];
+ long tickPosition = 0;
+
+ // Counts for each time signature change up to the last one before the given tick position.
+ Iterator it = timeSignatures.iterator();
+ MidiEvent lastTSEvent = (MidiEvent)it.next();
+ while(it.hasNext()) {
+ MidiEvent nextTSEvent = (MidiEvent)it.next();
+ int[] nextTSPos = getPositionForTicks(nextTSEvent.getTick());
+ if (nextTSPos[0] >= measures) break;
+ lastTSPos = nextTSPos;
+ lastTSEvent = nextTSEvent;
+ }
+
+ // Counts from the given tick position to the last time signature change before it.
+ int measdiff = measures - lastTSPos[0];
+ int[] ts = decodeTimeSig(((MetaMessage)lastTSEvent.getMessage()).getData());
+ int beatsPerMeasure = ts[0] * (4 / ts[1]);
+ tickPosition = lastTSEvent.getTick() + (beatsPerMeasure * measures + beats) * res + ticks;
+
+ return tickPosition;
+ }
+
+
+
+
+
+
+
+
+ /* ***
+ ** SYSTEM & IO METHODS **
+ *** */
+
+
+
+
+
+
+
+
+ /**
+ * Replaces the current sequence with a new one, holding three empty tracks.
+ */
+ public static void clearSequence() {
+ // Reinitializes sequence variables
+ file = null;
+ reinitializeLists();
+
+ try {
+ // Creates a new sequence.
+ seq = new Sequence(Sequence.PPQ, DEFAULT_RESOLUTION, DEFAULT_TRACKS);
+ Track[] tracks = seq.getTracks();
+
+ // Sets default tempo (120) and time signature (4/4) at the beginning of the sequence.
+ setTempo(0, 120);
+ setTimeSig(0, 4, 4);
+
+ // Sets program and title for the tracks.
+ initializeTrack(tracks[1], 0, 24, "Guitar");
+ initializeTrack(tracks[2], 1, 33, "Bass");
+ initializeTrack(tracks[3], 9, 0, "Drums");
+ } catch (InvalidMidiDataException e) {}
+
+ // Sends the sequence to the GUI.
+ if (gui != null) gui.setSequence(seq, null);
+ }
+
+ /**
+ * Creates event in the given track for program change and title.
+ */
+ private static void initializeTrack(Track track, int channel, int program, String title) {
+ // Creates program change and title message.
+ ShortMessage programMsg = new ShortMessage();
+ MetaMessage titleMsg = new MetaMessage();
+
+ // Sets the data of the messages.
+ try {
+ programMsg.setMessage(ShortMessage.PROGRAM_CHANGE, channel, program, 0);
+ titleMsg.setMessage(3, title.getBytes(), title.length());
+ } catch (InvalidMidiDataException e) {}
+
+ // Sends the program change to the channel
+ getChannel(channel).programChange(program);
+
+ // Adds them to the track.
+ track.add(new MidiEvent(programMsg, (long)0));
+ track.add(new MidiEvent(titleMsg, (long)0));
+ }
+
+ /**
+ * Wraps each NoteOn event in the track with its NoteOff event in a MooNote.
+ * @param track the track to convert
+ * @param quantize whether to round locations and durations in the track to nearest 16th
+ * @return a list of the created MooNotes
+ */
+ public static List convertTrack(Track track) {
+ // Searches the track for NoteOn and NoteOff events
+ ArrayList noteOns = new ArrayList(track.size() / 2);
+ ArrayList noteOffs = new ArrayList(track.size() / 2);
+ ArrayList newMooNotes = new ArrayList();
+ MidiEvent event;
+ for (int j = 0; j < track.size(); j++) {
+ event = track.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();
+ if (noteOns.size() == 0) emptyTracks.add(track);
+
+ // Sorts the note lists by tick position.
+ Comparator c = new MidiEventComparator();
+ Collections.sort(noteOns, c);
+ Collections.sort(noteOffs, c);
+
+ // Replaces each NoteOn event it with a MooNote containing a reference to the NoteOff event.
+ Iterator iOn = noteOns.iterator(), iOff;
+ MidiEvent on, off = null, nextOff;
+ ShortMessage onMsg, nextOffMsg;
+ while(iOn.hasNext()) {
+ on = (MidiEvent)iOn.next();
+ if (!(on instanceof MooNote)) {
+ 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;