Examples of javax.sound.midi.Track

javax.sound.midi.Track
A MIDI track is an independent stream of MIDI events (time-stamped MIDI data) that can be stored along with other tracks in a standard MIDI file. The MIDI specification allows only 16 channels of MIDI data, but tracks are a way to get around this limitation. A MIDI file can contain any number of tracks, each containing its own stream of up to 16 channels of MIDI data.
A Track occupies a middle level in the hierarchy of data played by a {@link Sequencer}: sequencers play sequences, which contain tracks, which contain MIDI events. A sequencer may provide controls that mute or solo individual tracks.
The timing information and resolution for a track is controlled by and stored in the sequence containing the track. A given Track is considered to belong to the particular {@link Sequence} that maintains its timing. For this reason, a new (empty) track is created by calling the {@link Sequence#createTrack} method, rather than by directly invoking a Track constructor.
The Track class provides methods to edit the track by adding or removing MidiEvent objects from it. These operations keep the event list in the correct time order. Methods are also included to obtain the track's size, in terms of either the number of events it contains or its duration in ticks. @see Sequencer#setTrackMute @see Sequencer#setTrackSolo @author Kara Kytle @author Florian Bomers

    /** MIDI �C�x���g�̒P��V�[�P���X��ݒ肵�܂��B */
    public void setMidiSequence(Sequence midiSequence) {


        this.timeBase = midiSequence.getResolution();


        Track midiTracks[] = midiSequence.getTracks();
        for (int t = 0; t < midiTracks.length; t++) {
            for (int i = 0; i < midiTracks[t].size(); i++) {
                javax.sound.midi.MidiMessage midiMessage = midiTracks[t].get(i).getMessage();
                if (midiMessage instanceof MetaMessage &&
                    ((MetaMessage) midiMessage).getType() == MidiConstants.META_TEMPO) {

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        while (true) {
            MidiEvent selevent = null;
            int seltrack = -1;
            for (int i = 0; i < tracks.length; i++) {
                int trackpos = trackspos[i];
                Track track = tracks[i];
                if (trackpos < track.size()) {
                    MidiEvent event = track.get(trackpos);
                    if (selevent == null || event.getTick() < selevent.getTick()) {
                        selevent = event;
                        seltrack = i;
                    }
                }

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     * @return array of file types.  If no file types are supported,
     * returns an array of length 0.
     */
    public int[] getMidiFileTypes(Sequence sequence){
        int typesArray[];
        Track tracks[] = sequence.getTracks();


        if( tracks.length==1 ) {
            typesArray = new int[2];
            typesArray[0] = MIDI_TYPE_0;
            typesArray[1] = MIDI_TYPE_1;

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    //=================================================================================




    private InputStream getFileStream(int type, Sequence sequence) throws IOException {
        Track tracks[] = sequence.getTracks();
        int bytesBuilt = 0;
        int headerLength = 14;
        int length = 0;
        int timeFormat;
        float divtype;

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        while (true) {
            MidiEvent selevent = null;
            int seltrack = -1;
            for (int i = 0; i < tracks.length; i++) {
                int trackpos = trackspos[i];
                Track track = tracks[i];
                if (trackpos < track.size()) {
                    MidiEvent event = track.get(trackpos);
                    if (selevent == null || event.getTick() < selevent.getTick()) {
                        selevent = event;
                        seltrack = i;
                    }
                }

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      sequencer.open();    //Open up the sequencer object we created
      sequencer.addControllerEventListener(ml, new int[] {127});  
      //Add a control event listener using our ml object
      
      Sequence seq = new Sequence(Sequence.PPQ, 4);   //Create a new sequence with a type and res
      Track track = seq.createTrack();        //Set the track to our new track on seq
      
      int r = 0;
      
      for (int i = 5; i < 61; i += 4) 
      {
        
        r = (int) ((Math.random() * 50) + 1);
        
        //Picking up the beats and adding our events to the track
        //Helps to add our rectangles along with the beat itself
        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));
        
      }
      
      //Set the sequencer's sequence to the Sequence object we created
      sequencer.setSequence(seq);

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        m_masterTempo = m_currentTempo =
                new Float(score.getTempo()).floatValue();
        //System.out.println("jMusic MidiSynth notification: Score TempoEvent (BPM) = " + score.getTempo());


        Track longestTrack = null;
        double longestTime = 0.0;
        double longestRatio = 1.0;


        Enumeration parts = score.getPartList().elements();
        while (parts.hasMoreElements()) {
            Part inst = (Part) parts.nextElement();


            int currChannel = inst.getChannel();
            if (currChannel > 16) {
                throw new
                        InvalidMidiDataException(inst.getTitle() +
                        " - Invalid Channel Number: " +
                        currChannel);
            }


            m_tempoHistory.push(new Float(m_currentTempo));


            float tempo = new Float(inst.getTempo()).floatValue();
            //System.out.println("jMusic MidiSynth notification: Part TempoEvent (BPM) = " + tempo);
            if (tempo != Part.DEFAULT_TEMPO) {
                m_currentTempo = tempo;
            } else if (tempo < Part.DEFAULT_TEMPO)
                System.out.println("jMusic MidiSynth error: Part TempoEvent (BPM) too low = " + tempo);


            trackTempoRatio = m_masterTempo / m_currentTempo;


            int instrument = inst.getInstrument();
            if (instrument == NO_INSTRUMENT) instrument = 0;


            Enumeration phrases = inst.getPhraseList().elements();
            double max = 0;
            double currentTime = 0.0;


            //
            // One track per Part
            /////////////
            Track currTrack = sequence.createTrack();
            while (phrases.hasMoreElements()) {
                /////////////////////////////////////////////////
                // Each phrase represents a new Track element
                // Err no
                // There is a 65? track limit
                // ////////////////////////////
                Phrase phrase = (Phrase) phrases.nextElement();


                //Track currTrack = sequence.createTrack();


                currentTime = phrase.getStartTime();
                long phraseTick = (long) (currentTime * m_ppqn * trackTempoRatio);
                MidiEvent evt;


                if (phrase.getInstrument() != NO_INSTRUMENT) instrument = phrase.getInstrument();
                evt = createProgramChangeEvent(currChannel, instrument, phraseTick);
                currTrack.add(evt);


                m_tempoHistory.push(new Float(m_currentTempo));


                tempo = new Float(phrase.getTempo()).floatValue();
                if (tempo != Phrase.DEFAULT_TEMPO) {
                    m_currentTempo = tempo;
                    //System.out.println("jMusic MidiSynth notification: Phrase TempoEvent (BPM) = " + tempo);
                }


                elementTempoRatio = m_masterTempo / m_currentTempo;


                double lastPanPosition = -1.0;
                int offSetTime = 0;
                /// Each note
                Enumeration notes = phrase.getNoteList().elements();
                while (notes.hasMoreElements()) {
                    Note note = (Note) notes.nextElement();
                    // deal with offset
                    offSetTime = (int) (note.getOffset() * m_ppqn * elementTempoRatio);


                    //handle frequency pitch types
                    int pitch = -1;
                    if (note.getPitchType() == Note.MIDI_PITCH) {
                        pitch = note.getPitch();
                    } else {
                        pitch = Note.freqToMidiPitch(note.getFrequency());
                    }


                    int dynamic = note.getDynamic();


                    if (pitch == Note.REST) {
                        phraseTick += note.getRhythmValue() * m_ppqn * elementTempoRatio;
                        continue;
                    }


                    long onTick = (long) (phraseTick);
                    // pan
                    if (note.getPan() != lastPanPosition) {
                        evt = createCChangeEvent(currChannel, 10, (int) (note.getPan() * 127), onTick);
                        currTrack.add(evt);
                        lastPanPosition = note.getPan();
                    }


                    evt = createNoteOnEvent(currChannel, pitch, dynamic, onTick + offSetTime);
                    currTrack.add(evt);


                    long offTick = (long) (phraseTick + note.getDuration() * m_ppqn * elementTempoRatio);


                    evt = createNoteOffEvent(currChannel, pitch, dynamic, offTick + offSetTime);
                    currTrack.add(evt);


                    phraseTick += note.getRhythmValue() * m_ppqn * elementTempoRatio;


                    // TODO:  Should this be ticks since we have tempo stuff
                    // to worry about

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        m_masterTempo = m_currentTempo =
            new Float(score.getTempo()).floatValue();
    //System.out.println("jMusic MidiSynth notification: Score TempoEvent (BPM) = " + score.getTempo());


        Track longestTrack = null;
        double longestTime = 0.0;
        double longestRatio = 1.0;


        Enumeration parts = score.getPartList().elements();
        while(parts.hasMoreElements()) {
            Part inst = (Part) parts.nextElement();


            int currChannel = inst.getChannel();
            if (currChannel > 16) {
                throw new
                    InvalidMidiDataException(inst.getTitle() +
                                            " - Invalid Channel Number: " +
                                            currChannel);
            }


            m_tempoHistory.push(new Float(m_currentTempo));


            float tempo = new Float(inst.getTempo()).floatValue();
      //System.out.println("jMusic MidiSynth notification: Part TempoEvent (BPM) = " + tempo);
            if (tempo != Part.DEFAULT_TEMPO) {
                m_currentTempo = tempo;
            } else if (tempo < Part.DEFAULT_TEMPO) 
                System.out.println("jMusic MidiSynth error: Part TempoEvent (BPM) too low = " + tempo);


            trackTempoRatio = m_masterTempo/m_currentTempo;


            int instrument = inst.getInstrument();
            if (instrument == NO_INSTRUMENT) instrument = 0;


            Enumeration phrases = inst.getPhraseList().elements(); 
            double max = 0;
            double currentTime = 0.0;
      
      // 
      // One track per Part
      /////////////
            Track currTrack=sequence.createTrack(); 
            while(phrases.hasMoreElements()) {
                /////////////////////////////////////////////////
                // Each phrase represents a new Track element
    // Err no
    // There is a 65? track limit
    // ////////////////////////////
                Phrase phrase = (Phrase) phrases.nextElement();


                //Track currTrack = sequence.createTrack();


                currentTime = phrase.getStartTime();
                long phraseTick = (long)(currentTime * m_ppqn * trackTempoRatio);
                MidiEvent evt;


                if (phrase.getInstrument() != NO_INSTRUMENT) instrument = phrase.getInstrument();
                evt = createProgramChangeEvent(currChannel, instrument, phraseTick);
                currTrack.add(evt);


                m_tempoHistory.push(new Float(m_currentTempo));


                tempo = new Float(phrase.getTempo()).floatValue();
                if (tempo != Phrase.DEFAULT_TEMPO) {
                    m_currentTempo = tempo;
                    //System.out.println("jMusic MidiSynth notification: Phrase TempoEvent (BPM) = " + tempo);
                }


                elementTempoRatio = m_masterTempo/m_currentTempo;


                double lastPanPosition = -1.0;  
                int offSetTime = 0;          
                /// Each note
                Enumeration notes = phrase.getNoteList().elements();
                while(notes.hasMoreElements()) {
                    Note note = (Note) notes.nextElement();
                    // deal with offset
                    offSetTime = (int)(note.getOffset() * m_ppqn * elementTempoRatio);


          //handle frequency pitch types
          int pitch = -1;
          if(note.getPitchType() == Note.MIDI_PITCH) {
            pitch = note.getPitch();
          } else {
            pitch = Note.freqToMidiPitch(note.getFrequency());
          }


                    int dynamic = note.getDynamic();


                    if (pitch == Note.REST) {
                        phraseTick += note.getRhythmValue() * m_ppqn * elementTempoRatio;
                        continue;
                    }


                    long onTick = (long)(phraseTick);
                    // pan
                    if (note.getPan() != lastPanPosition) {
      evt = createCChangeEvent(currChannel, 10, (int)(note.getPan()*127), onTick);
      currTrack.add(evt);
      lastPanPosition = note.getPan();
        }


                    evt = createNoteOnEvent(currChannel, pitch, dynamic, onTick + offSetTime);
                    currTrack.add(evt);


                    long offTick = (long)(phraseTick + note.getDuration() * m_ppqn * elementTempoRatio);


                    evt = createNoteOffEvent(currChannel, pitch, dynamic, offTick + offSetTime);
                    currTrack.add(evt);


                    phraseTick += note.getRhythmValue() * m_ppqn * elementTempoRatio;


                    // TODO:  Should this be ticks since we have tempo stuff
                    // to worry about

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