Examples of javax.sound.midi.MetaMessage

javax.sound.midi.MetaMessage
idi.org>http://www.midi.org).
When data is being transported using MIDI wire protocol, a {@link ShortMessage} with the status value 0xFF represents a system reset message. In MIDI files, this same status value denotes a MetaMessage. The types of meta-message are distinguished from each other by the first byte that follows the status byte 0xFF. The subsequent bytes are data bytes. As with system exclusive messages, there are an arbitrary number of data bytes, depending on the type of MetaMessage. @see MetaEventListener @author David Rivas @author Kara Kytle

     * @see MachineDependSequencer#META_FUNCTION_ID_MACHINE_DEPEND
     */
    public MidiEvent[] getMidiEvents(MidiContext context)
        throws InvalidMidiDataException {


        MetaMessage metaMessage = new MetaMessage();


        int id = MfiMessageStore.put(this);
        byte[] data = {
            VaviMidiDeviceProvider.MANUFACTURER_ID,
            MachineDependSequencer.META_FUNCTION_ID_MACHINE_DEPEND,
            (byte) ((id / 0x100) & 0xff),
            (byte) ((id % 0x100) & 0xff)
        };
        metaMessage.setMessage(0x7f,    // �V�[�P���T�[�ŗL���^�C�x���g
                               data,
                               data.length);


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

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    //----


    /** */
    public MidiEvent[] getMidiEvents(MidiContext context) throws InvalidMidiDataException {
        MetaMessage metaMessage = new MetaMessage();


        int id = MfiMessageStore.put(this);
        byte[] data = {
            VaviMidiDeviceProvider.MANUFACTURER_ID,
            META_FUNCTION_ID_MFi4,
            (byte) ((id / 0x100) & 0xff),
            (byte) ((id % 0x100) & 0xff)
        };
        metaMessage.setMessage(0x7f,    // �V�[�P���T�[�ŗL���^�C�x���g
                               data,
                               data.length);


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

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            int metatype;
            int data1, data2;
            int length;
            byte data[] = null;
            ShortMessage shortMessage = null;
            MetaMessage  metaMessage  = null;
            SysexMessage sysexMessage = null;


            // get the tick
            // $$jb: this gets easier if we change all system-wide time to delta ticks
            eventTick = event.getTick();
            deltaTick = event.getTick() - currentTick;
            currentTick = event.getTick();


            // get the status byte
            status = event.getMessage().getStatus();
            eventtype = getType( status );


            switch( eventtype ) {
            case ONE_BYTE:
                shortMessage = (ShortMessage) event.getMessage();
                data1 = shortMessage.getData1();
                bytesWritten += writeVarInt( deltaTick );


                if(status!=runningStatus) {
                    runningStatus=status;
                    tddos.writeByte(status);  bytesWritten += 1;
                }
                tddos.writeByte(data1);   bytesWritten += 1;
                break;


            case TWO_BYTE:
                shortMessage = (ShortMessage) event.getMessage();
                data1 = shortMessage.getData1();
                data2 = shortMessage.getData2();


                bytesWritten += writeVarInt( deltaTick );
                if(status!=runningStatus) {
                    runningStatus=status;
                    tddos.writeByte(status);  bytesWritten += 1;
                }
                tddos.writeByte(data1);   bytesWritten += 1;
                tddos.writeByte(data2);   bytesWritten += 1;
                break;


            case SYSEX:
                sysexMessage = (SysexMessage) event.getMessage();
                length     = sysexMessage.getLength();
                data       = sysexMessage.getMessage();
                bytesWritten += writeVarInt( deltaTick );


                // $$jb: 04.08.99: always write status for sysex
                runningStatus=status;
                tddos.writeByte( data[0] ); bytesWritten += 1;


                // $$jb: 10.18.99: we don't maintain length in
                // the message data for SysEx (it is not transmitted
                // over the line), so write the calculated length
                // minus the status byte
                bytesWritten += writeVarInt( (data.length-1) );


                // $$jb: 10.18.99: now write the rest of the
                // message
                tddos.write(data, 1, (data.length-1));
                bytesWritten += (data.length-1);
                break;


            case META:
                metaMessage = (MetaMessage) event.getMessage();
                length    = metaMessage.getLength();
                data      = metaMessage.getMessage();
                bytesWritten += writeVarInt( deltaTick );


                // $$jb: 10.18.99: getMessage() returns the
                // entire valid midi message for a file,
                // including the status byte and the var-length-int

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            for (Track track : tracks) {
                xhtml.startElement("p");
                for (int i = 0; i < track.size(); i++) {
                    MidiMessage message = track.get(i).getMessage();
                    if (message instanceof MetaMessage) {
                        MetaMessage meta = (MetaMessage) message;
                        // Types 1-15 are reserved for text events
                        if (meta.getType() >= 1 && meta.getType() <= 15) {
                            // FIXME: What's the encoding?
                            xhtml.characters(
                                    new String(meta.getData(), "ISO-8859-1"));
                        }
                    }
                }
                xhtml.endElement("p");
            }

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        return h;
    }
    /** constructs a midi text message */
    public static MidimsgHolder text(long offset, String text) throws InvalidMidiDataException
    {
        MetaMessage mi = new MetaMessage();
        byte[] bytes = text.getBytes();
        mi.setMessage(0x01, bytes, bytes.length);
        return new MidimsgHolder(offset, mi);
    }

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        // process a MetaMessage


        if (eventInfo.getEvent() instanceof MetaMessage) {


            MetaMessage event = (MetaMessage)eventInfo.getEvent();
            Vector currentListeners = eventInfo.getListeners();


            for (int i = 0; i < currentListeners.size(); i++) {
                ((MetaEventListener)currentListeners.elementAt(i)).meta(event);
            }


            return;
        }


        // process a Controller or Mode Event


        if (eventInfo.getEvent() instanceof ShortMessage) {


            ShortMessage event = (ShortMessage)eventInfo.getEvent();
            int status = event.getStatus();


            // Controller and Mode events have status byte 0xBc, where
            // c is the channel they are sent on.


            if( (status>>4)==11 ) {

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                        int metaLength = (int) readVarInt();


                        byte[] metaData = new byte[metaLength];
                        read(metaData);


                        MetaMessage metaMessage = new MetaMessage();
                        metaMessage.setMessage(metaType, metaData, metaLength);
                        message = metaMessage;
                        if (metaType == 0x2F) {
                            // end of track means it!
                            endOfTrackFound = true;
                        }

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            for (Track track : tracks) {
                xhtml.startElement("p");
                for (int i = 0; i < track.size(); i++) {
                    MidiMessage message = track.get(i).getMessage();
                    if (message instanceof MetaMessage) {
                        MetaMessage meta = (MetaMessage) message;
                        // Types 1-15 are reserved for text events
                        if (meta.getType() >= 1 && meta.getType() <= 15) {
                            // FIXME: What's the encoding?
                            xhtml.characters(
                                    new String(meta.getData(), "ISO-8859-1"));
                        }
                    }
                }
                xhtml.endElement("p");
            }

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        } // while(parts.hasMoreElements())


        // add a meta event to indicate the end of the sequence.
        if (longestTime > 0.0 && longestTrack != null) {
            MetaMessage msg = new MetaMessage();
            byte [] data = new byte[0];
            msg.setMessage(StopType, data, 0);
            MidiEvent evt = new MidiEvent(msg, (long)longestTime); //+ 100 if you want leave some space for reverb tail
            longestTrack.add(evt);
        }


        return sequence;

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            return;
        }


        // process a MetaMessage
        if (eventInfo.getEvent() instanceof MetaMessage) {
            MetaMessage event = (MetaMessage)eventInfo.getEvent();
            for (int i = 0; i < count; i++) {
                try {
                    ((MetaEventListener) eventInfo.getListener(i)).meta(event);
                } catch (Throwable t) {
                    if (Printer.err) t.printStackTrace();
                }
            }
            return;
        }


        // process a Controller or Mode Event
        if (eventInfo.getEvent() instanceof ShortMessage) {
            ShortMessage event = (ShortMessage)eventInfo.getEvent();
            int status = event.getStatus();


            // Controller and Mode events have status byte 0xBc, where
            // c is the channel they are sent on.
            if ((status & 0xF0) == 0xB0) {
                for (int i = 0; i < count; i++) {

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