public void buildTrackAndStart() {
int[] trackList = null;
sequence.deleteTrack(track);
track = sequence.createTrack();
for (int i = 0; i < 16; i++) {
trackList = new int[16];
int key = instruments[i];
for (int j = 0; j < 16; j++) {
JCheckBox jc = (JCheckBox) checkboxList.get(j + (16 * i));
if (jc.isSelected()) {
trackList[j] = key;
} else {
trackList[j] = 0;
}
} // close inner loop
makeTracks(trackList);
track.add(makeEvent(176, 1, 127, 0, 16));
} // close outer
track.add(makeEvent(192, 9, 1, 0, 15));
try {
sequencer.setSequence(sequence);
sequencer.setLoopCount(sequencer.LOOP_CONTINUOUSLY);
sequencer.start();
sequencer.setTempoInBPM(120);
} catch (Exception e) {
e.printStackTrace();
}
} // close buildTrackAndStart method
public void playStop() {
if (sequence != null) {
if (playState == PLAYING || playState == PAUSED) {
sequencer.stop();
sequencer.close();
playState = STOPPED;
}
}
}
public void playLoop() {
if (sequence != null) {
double playStartTime = (player.getSeekTime() / 100) * (playGetLength());
sequencer.setMicrosecondPosition((long) playStartTime);
if (playState != PLAYING) {
sequencer.start();
playState = PLAYING;
}
}
}
public void setUpMidi() {
try {
sequencer = MidiSystem.getSequencer();
sequencer.open();
sequence = new Sequence(Sequence.PPQ, 4);
track = sequence.createTrack();
sequencer.setTempoInBPM(120);
} catch (Exception e) {
e.printStackTrace();
}
} // close method
public void playResume() {
if (sequence != null) {
if (playState == PAUSED) {
sequencer.start();
playState = PLAYING;
}
}
}
public void playPause() {
if (sequence != null) {
if (playState == PLAYING) {
sequencer.stop();
playState = PAUSED;
}
}
}
public void go() {
setUpGui();
try {
Sequencer sequencer = MidiSystem.getSequencer();
sequencer.open();
// make a sequencer and open
sequencer.addControllerEventListener(m1, new int[] {127});
Sequence seq = new Sequence(Sequence.PPQ, 4);
Track track = seq.createTrack();
int r = 0;
for (int i = 0; i < 300; i += 4) {
r = (int) ((Math.random() * 50) + 1);
track.add(makeEvent(144, 1, r, 100, i));
track.add(makeEvent(176, 1, 127, 0, i));
track.add(makeEvent(128, 1, r, 100, i + 2));
} // end loop
sequencer.setSequence(seq);
sequencer.start();
sequencer.setTempoInBPM(120);
} catch (Exception ex) {
ex.printStackTrace();
}
} // close method
public void close() {
System.out.println("midi closing");
if (synthesizer != null) {
synthesizer.close();
}
if (sequencer != null) {
sequencer.close();
}
sequencer = null;
synthesizer = null;
instruments = null;
channels = null;
}
public boolean play() {
try {
if (playState != STOPPED) playStop();
if (sequence == null) return false;
if (sequencer == null) return false;
sequencer.open();
sequencer.setSequence(sequence);
double playStartTime = (player.getSeekTime() / 100) * (playGetLength());
sequencer.setMicrosecondPosition((long) playStartTime);
sequencer.start();
playState = PLAYING;
return true;
} catch (Exception ex) {
ex.printStackTrace();
playState = STOPPED;
return false;
}
}
public boolean open() {
try {
if (synthesizer == null) {
if ((synthesizer = MidiSystem.getSynthesizer()) == null) {
System.out.println("getSynthesizer() failed!");
return false;
}
}
synthesizer.open();
sequencer = MidiSystem.getSequencer();
sequencer.addMetaEventListener(new ProcessMeta());
sequence = new Sequence(Sequence.PPQ, 10);
} catch (Exception ex) {
System.out.println("midi exception 1 ");
ex.printStackTrace();
return false;
}
System.out.println("midi opening");
Soundbank sb = synthesizer.getDefaultSoundbank();
if (sb != null) {
instruments = synthesizer.getDefaultSoundbank().getInstruments();
synthesizer.loadInstrument(instruments[0]);
}
MidiChannel midiChannels[] = synthesizer.getChannels();
numChannels = midiChannels.length;
channels = new ChannelData[midiChannels.length];
if (channels.length == 0) return false;
for (int i = 0; i < channels.length; i++) {
channels[i] = new ChannelData(midiChannels[i], i);
}
cc = channels[0];
return true;
}
public void actionPerformed(ActionEvent ev) {
try {
// make (and open) a sequencer, make a sequence and track
Sequencer sequencer = MidiSystem.getSequencer();
sequencer.open();
sequencer.addControllerEventListener(myPanel, new int[] {127});
Sequence seq = new Sequence(Sequence.PPQ, 4);
Track track = seq.createTrack();
// now make two midi events (containing a midi message)
for (int i = 0; i < 100; i += 4) {
int rNum = (int) ((Math.random() * 50) + 1);
if (rNum < 38) { // so now only do it if num <38 (75% of the time)
track.add(makeEvent(144, 1, rNum, 100, i));
track.add(makeEvent(176, 1, 127, 0, i));
track.add(makeEvent(128, 1, rNum, 100, i + 2));
}
} // end loop
// add the events to the track
// add the sequence to the sequencer, set timing, and start
sequencer.setSequence(seq);
sequencer.start();
sequencer.setTempoInBPM(220);
} catch (Exception ex) {
ex.printStackTrace();
}
} // close actionperformed
public void los() {
guiErstellen();
try {
// einen Sequencer erzeugen (und öffnen),
// eine Sequence und einen Track erzeugen
Sequencer sequencer = MidiSystem.getSequencer();
sequencer.open();
sequencer.addControllerEventListener(ml, new int[] {127});
Sequence seq = new Sequence(Sequence.PPQ, 4);
Track track = seq.createTrack();
// jetzt werden MidiEvents (die eine
// MidiMessage enthalten) erzeugt
int r = 0;
for (int i = 0; i < 60; i += 4) {
r = (int) ((Math.random() * 50) + 1);
track.add(eventErzeugen(144, 1, r, 100, i));
track.add(eventErzeugen(176, 1, 127, 0, i));
track.add(eventErzeugen(128, 1, r, 100, i + 2));
} // Ende der for-Schleife
// Hinzufügen der Events zum Track und der Sequence
// zum Sequencer, Setzen der Zeiten und Starten
sequencer.setSequence(seq);
sequencer.start();
sequencer.setTempoInBPM(120);
} catch (Exception ex) {
ex.printStackTrace();
}
} // Methode los schließen
public void playSetSeek(double seekTime) {
if (sequence != null) {
sequencer.setMicrosecondPosition((long) (seekTime * 1000.0));
}
}
public double playGetTime() {
if (sequence != null) {
return ((double) sequencer.getMicrosecondPosition()) / 1000.0;
}
return 0;
}
