Examples of javax.sound.midi.MidiEvent

javax.sound.midi.MidiEvent
MIDI events contain a MIDI message and a corresponding time-stamp expressed in ticks, and can represent the MIDI event information stored in a MIDI file or a {@link Sequence} object. The duration of a tick is specified by the timing information contained in the MIDI file or Sequence object.
In Java Sound, MidiEvent objects are typically contained in a {@link Track}, and Tracks are likewise contained in a Sequence. @author David Rivas @author Kara Kytle

//Debug.println("Expression: [" + duration + "] " + channel + "ch, " + volume);
        shortMessage.setMessage(ShortMessage.CONTROL_CHANGE,
                                midiChannel,
                                11,  // �G�N�X�v���b�V���� MSB
                                volume);
        events[0] = new MidiEvent(shortMessage, context.getCurrentTick());
        return events;
    }

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        metaMessage.setMessage(MidiConstants.META_NAME,    // �V�[�P���X��/�g���b�N��
                               getData(),
                               getDataLength());


        return new MidiEvent[] {
            new MidiEvent(metaMessage, context.getCurrent())
        };
    }

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     */
    public SmafEvent[] getIntervalSmafEvents() {


        int interval = 0;
        int track = 0;
        MidiEvent midiEvent = midiTrack.get(midiEventIndex);


        MidiMessage midiMessage = midiEvent.getMessage();
        if (midiMessage instanceof ShortMessage) {
            // note
            ShortMessage shortMessage = (ShortMessage) midiMessage;
            int channel = shortMessage.getChannel();


            track = retrieveSmafTrack(channel);
            interval = retrieveDelta(track, midiEvent.getTick());
        } else if (midiMessage instanceof MetaMessage && ((MetaMessage) midiMessage).getType() == 81) {
            // tempo
            track = smafTrackNumber;
            interval = retrieveDelta(track, midiEvent.getTick());
Debug.println("interval for tempo[" + smafTrackNumber + "]: " + interval);
        } else if (midiMessage instanceof MetaMessage && ((MetaMessage) midiMessage).getType() == 47) {
            // eot
            track = smafTrackNumber;
            interval = retrieveDelta(track, midiEvent.getTick());
Debug.println("interval for EOT[" + smafTrackNumber + "]: " + interval);
        } else if (midiMessage instanceof SysexMessage) {
            return null;
        } else {
Debug.println(Level.WARNING, "not supported message: " + midiMessage);

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     * �Ԃ��悤�ɂ��Ă����ĉ������B
     */
    public int getDuration() {


        int delta = 0;
        MidiEvent midiEvent = midiTrack.get(midiEventIndex);


        MidiMessage midiMessage = midiEvent.getMessage();
        if (midiMessage instanceof ShortMessage) {
            // note
            ShortMessage shortMessage = (ShortMessage) midiMessage;
            int channel = shortMessage.getChannel();
            
            delta = retrieveAdjustedDelta(retrieveSmafTrack(channel), midiEvent.getTick()); 
        } else if (midiMessage instanceof MetaMessage && ((MetaMessage) midiMessage).getType() == 81) {
            // tempo
            delta = retrieveAdjustedDelta(smafTrackNumber, midiEvent.getTick()); // TODO smafTrackNumber �ł����̂��H
Debug.println("delta for tempo[" + smafTrackNumber + "]: " + delta);
        } else {
Debug.println("no delta defined for: " + midiMessage);
        }

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     */
    public MidiEvent getNextMidiEvent() throws NoSuchElementException {


        ShortMessage shortMessage = null;


        MidiEvent midiEvent = midiTrack.get(midiEventIndex);
        MidiMessage midiMessage = midiEvent.getMessage();
        if (midiMessage instanceof ShortMessage) {
            shortMessage = (ShortMessage) midiMessage;
        } else {
            throw new IllegalStateException("current is not ShortMessage");
        }


        int channel = shortMessage.getChannel();
        int data1 = shortMessage.getData1();


        for (int i = midiEventIndex + 1; i < midiTrack.size(); i++) {
            midiEvent = midiTrack.get(i);
            midiMessage = midiEvent.getMessage();
            if (midiMessage instanceof ShortMessage) {
                shortMessage = (ShortMessage) midiMessage;
                if (shortMessage.getChannel() == channel &&
                    shortMessage.getCommand() == ShortMessage.NOTE_ON &&
                    shortMessage.getData1() != data1) {

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     */
    public MidiEvent getNoteOffMidiEvent() throws NoSuchElementException {


        ShortMessage shortMessage = null;


        MidiEvent midiEvent = midiTrack.get(midiEventIndex);
        MidiMessage midiMessage = midiEvent.getMessage();
        if (midiMessage instanceof ShortMessage) {
            shortMessage = (ShortMessage) midiMessage;
        } else {
            throw new IllegalStateException("current is not ShortMessage");
        }


        int channel = shortMessage.getChannel();
        int data1 = shortMessage.getData1();


        for (int i = midiEventIndex + 1; i < midiTrack.size(); i++) {
            midiEvent = midiTrack.get(i);
            midiMessage = midiEvent.getMessage();
            if (midiMessage instanceof ShortMessage) {
                shortMessage = (ShortMessage) midiMessage;
                if (shortMessage.getChannel() == channel &&
                    shortMessage.getData1() == data1) {

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        metaMessage.setMessage(MidiConstants.META_TEXT_EVENT, // �e�L�X�g
                               getData(),
                               getDataLength());


        return new MidiEvent[] {
            new MidiEvent(metaMessage, context.getCurrent())
        };
    }

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        MetaMessage metaMessage = new MetaMessage();
        metaMessage.setMessage(MidiConstants.META_NAME,
                               data,
                               data.length);
        return new MidiEvent[] {
            new MidiEvent(metaMessage, 0)
        };
    }

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        shortMessage.setMessage(ShortMessage.NOTE_ON,
                                midiChannel,
                                pitch,
                                velocity);
//Debug.println("note: " + channel + ": " + pitch);
        events[0] = new MidiEvent(shortMessage, context.getCurrentTick());


        shortMessage = new ShortMessage();
        shortMessage.setMessage(ShortMessage.NOTE_OFF,
                                midiChannel,
                                pitch,
                                0);
        events[1] = new MidiEvent(shortMessage, context.getCurrentTick() + length);


        return events;
    }

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            }


            return null;
        } else /* if (command == ShortMessage.NOTE_ON) */ {


            MidiEvent noteOffEvent = null;


            try {
                noteOffEvent = context.getNoteOffMidiEvent();
            } catch (NoSuchElementException e) {
Debug.println(Level.WARNING, "[" + context.getMidiEventIndex() + "] no pair of OFF for: " + channel + "ch, " + data1);
                return null;
            }


            int track = context.retrieveSmafTrack(channel);
            int voice = context.retrieveVoice(channel);


            double scale = context.getScale();


            long currentTick = midiEvent.getTick();
            long noteOffTick = noteOffEvent.getTick();
            int length = (int) Math.round((noteOffTick - currentTick) / scale);


            int delta = context.getDuration();


            int onLength = (length + 254) / 255;

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