+
+ if (recordTrack != null && recordTrackView != null) {
+ recordTrackView.disableKeyboardRecording();
+ sequencer.stopRecording();
+ sequencer.recordDisable(recordTrack);
+ if (quantizers[0]) recordTrackView.placeNewNotes(quantize(
+ convertTrack(recordTrack), quantizeResolution, quantizers[1], quantizers[2]));
+ else recordTrackView.placeNewNotes(Moosique.convertTrack(recordTrack));
+ }
+ }
+
+ /**
+ * Enables recording to the given track.
+ * @param track the track in which to store the recorded data
+ * @param tempo the channel from which to record data
+ * @param quantizers an array of booleans where 0 = quantize?, 1 = location, 2 = duration
+ * @param resolution the note size to round each note to
+ * @return if the recording was initialised successfully
+ */
+ public static boolean record(Track track, int channel, boolean[] quants, int resolution) {
+ try {
+ sequencer.recordEnable(track, channel);
+ sequencer.startRecording();
+ } catch(Exception e) {
+ e.printStackTrace();
+ return false;
+ }
+ quantizers = quants;
+ quantizeResolution = resolution;
+ recordTrack = track;
+ recordTrackView = gui.getView().getTrackView(track);
+ recordTrackView.enableKeyboardRecording();
+ Moosique.setEdited();
+ return true;
+ }
+
+
+
+
+
+
+
+
+ /* ***
+ ** TEMPO & TIME SIGNATURE METHODS **
+ *** */
+
+
+
+
+
+
+
+
+ /**
+ * Returns the byte array for the given tempo.
+ * @param tempo the tempo in beats per minute
+ * @return an array of bytes representing the given tempo
+ */
+ public static byte[] encodeTempo(int tempo) {
+ int microSecsPerQuarter = 60000000 / tempo;
+ byte[] b = new byte[3];
+ b[0] = (byte)(microSecsPerQuarter / 65536);
+ b[1] = (byte)((microSecsPerQuarter - (b[0] * 65536)) / 256);
+ b[2] = (byte)(microSecsPerQuarter - (b[0] * 65536) - (b[1] * 256));
+ return b;
+ }
+
+ /**
+ * Returns the tempo for the given byte array.
+ * @param an array of three bytes representing the tempo
+ * @return the tempo in beats per minute
+ */
+ public static int decodeTempo(byte[] bytes) {
+ return 60000000 / (bytes[0] * 65536 + bytes[1] * 256 + bytes[2]);
+ }
+
+ /**
+ * Returns the tempo in the given tick position.
+ * @param tick the tick position for which to return the tempo
+ * @return the tempo at the specified tick position
+ */
+ public static int getTempo(long tick) {
+ if (tempoChanges.size() == 0) return 120;
+ MidiEvent tempoEvent = (MidiEvent)tempoChanges.get(0);
+ if (tempoChanges.size() > 1) {
+ for (int i = 1; i < tempoChanges.size(); i++) {
+ MidiEvent nextTempoEvent = (MidiEvent)tempoChanges.get(i);
+ if (nextTempoEvent.getTick() < tick && nextTempoEvent.getTick() > tempoEvent.getTick())
+ tempoEvent = nextTempoEvent;
+ }
+ }
+ return decodeTempo(((MetaMessage)tempoEvent.getMessage()).getData());
+ }
+
+ /**
+ * Sets the tempo at the given tick position.
+ * @param ticks the tick position
+ */
+ public static void setTempo(long tick, int bpm) {
+ // Checks for a tempo event at the given tick position.
+ MidiEvent tempoEvent = null;
+ Iterator it = tempoChanges.iterator();
+ while(it.hasNext()) {
+ MidiEvent nextTempoEvent = (MidiEvent)it.next();
+ if (nextTempoEvent.getTick() == tick) {
+ tempoEvent = nextTempoEvent;
+ break;
+ }
+ }
+
+ // If none was found, creates and adds a new one.
+ if (tempoEvent == null) {
+ tempoEvent = new MidiEvent(new MetaMessage(), tick);
+ (seq.getTracks())[0].add(tempoEvent);
+ tempoChanges.add(tempoEvent);
+ Collections.sort(tempoChanges, new MidiEventComparator());
+ }
+
+ // Sets the tempo of the event (found or created).
+ try {
+ ((MetaMessage)tempoEvent.getMessage()).setMessage(81, encodeTempo(bpm), 3);
+ } catch (InvalidMidiDataException e) {}
+ }
+
+ /**
+ * Returns the byte array for the given time signature.
+ * @param numerator the numerator of the time signature
+ * @param denominator the denominator of the time signature
+ * @return an array of bytes representing the given time signature
+ */
+ public static byte[] encodeTimeSig(int numerator, int denominator) {
+ byte[] b = {
+ (byte)numerator,
+ (byte)(Math.log(denominator) / Math.log(2)), // logarithm of denominator in base 2
+ (byte)96,
+ (byte)8
+ };
+ return b;
+ }
+ /**
+ * Returns the time signature for the given byte array.
+ * @param an array of four bytes representing the time signature
+ * @return an array of two integers where [0] is the numerator and [1] the denominator
+ */
+ public static int[] decodeTimeSig(byte[] bytes) {
+ int[] t = {
+ (int)bytes[0],
+ (int)(1 << bytes[1])
+ };
+ return t;
+ }
+
+ /**
+ * Returns the time signature in the given tick position.
+ * @param tick the tick position for which to return the time signature
+ * @return an array of two integers where [0] is the numerator and [1] the denominator
+ */
+ public static int[] getTimeSig(long tick) {
+ int[] ts = {4, 4};
+ if (timeSignatures.size() == 0) return ts;
+ MidiEvent timeSigEvent = (MidiEvent)timeSignatures.get(0);
+ if (timeSignatures.size() > 1) {
+ for (int i = 1; i < timeSignatures.size(); i++) {
+ MidiEvent nextTimeSigEvent = (MidiEvent)timeSignatures.get(i);
+ if (nextTimeSigEvent.getTick() <= tick && nextTimeSigEvent.getTick() > timeSigEvent.getTick())
+ timeSigEvent = nextTimeSigEvent;
+ }
+ }
+ return decodeTimeSig(((MetaMessage)timeSigEvent.getMessage()).getData());
+ }
+
+ /**
+ * Sets the time signature at the given tick position.
+ * @param ticks the tick position
+ */
+ public static void setTimeSig(long tick, int numerator, int denominator) {
+ // Checks for a time signature event at the given tick position.
+ MidiEvent timeSigEvent = null;
+ Iterator it = timeSignatures.iterator();
+ while(it.hasNext()) {
+ MidiEvent nextTimeSigEvent = (MidiEvent)it.next();
+ if (nextTimeSigEvent.getTick() == tick) {
+ timeSigEvent = nextTimeSigEvent;
+ break;
+ }
+ }
+
+ // If none was found, creates and adds a new one.
+ if (timeSigEvent == null) {
+ timeSigEvent = new MidiEvent(new MetaMessage(), tick);
+ (seq.getTracks())[0].add(timeSigEvent);
+ timeSignatures.add(timeSigEvent);
+ Collections.sort(timeSignatures, new MidiEventComparator());
+ }
+
+ // Sets the time signature of the event (found or created).
+ try {
+ ((MetaMessage)timeSigEvent.getMessage()).setMessage(88, encodeTimeSig(numerator, denominator), 4);
+ } catch (InvalidMidiDataException e) {}
+ }
+
+ /**
+ * Calculates the position (measures, beats, ticks) in the current sequence for the given tick position.
+ * @param tickPosition the tick position for which to calculate the position
+ * @return an array of integers where index 0 is measures, 1 is beats and 2 is ticks.
+ */
+ public static int[] getPositionForTicks(long tickPosition) {
+ int ticksPerBeat = seq.getResolution();
+ long measures = 0, beats = 0, ticks = 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();
+ if (nextTSEvent.getTick() > tickPosition) break;
+ long tickDiff = nextTSEvent.getTick() - lastTSEvent.getTick();
+ int[] ts = decodeTimeSig(((MetaMessage)lastTSEvent.getMessage()).getData());
+ int beatsPerMeasure = ts[0] * (4 / ts[1]);
+ long thisTSMeasures = tickDiff / (beatsPerMeasure * ticksPerBeat);
+ measures += thisTSMeasures;
+ long thisTSBeats = (tickDiff - thisTSMeasures * beatsPerMeasure * ticksPerBeat) / ticksPerBeat;
+ beats += thisTSBeats;
+ ticks += tickDiff - thisTSMeasures * beatsPerMeasure * ticksPerBeat - thisTSBeats * ticksPerBeat;
+ lastTSEvent = nextTSEvent;
+ }
+
+ // Counts from the given tick position to the last time signature change before it.
+ long tickDiff = tickPosition - lastTSEvent.getTick();
+ int[] ts = decodeTimeSig(((MetaMessage)lastTSEvent.getMessage()).getData());
+ int beatsPerMeasure = ts[0] * (4 / ts[1]);
+ long thisTSMeasures = tickDiff / (beatsPerMeasure * ticksPerBeat);
+ measures += thisTSMeasures;
+ long thisTSBeats = (tickDiff - thisTSMeasures * beatsPerMeasure * ticksPerBeat) / ticksPerBeat;
+ beats += thisTSBeats;
+ ticks += tickDiff - thisTSMeasures * beatsPerMeasure * ticksPerBeat - thisTSBeats * ticksPerBeat;
+
+ // 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;