Examples of javax.sound.midi.SysexMessage

javax.sound.midi.SysexMessage
A SysexMessage object represents a MIDI system exclusive message.
When a system exclusive message is read from a MIDI file, it always has a defined length. Data from a system exclusive message from a MIDI file should be stored in the data array of a SysexMessage as follows: the system exclusive message status byte (0xF0 or 0xF7), all message data bytes, and finally the end-of-exclusive flag (0xF7). The length reported by the SysexMessage object is therefore the length of the system exclusive data plus two: one byte for the status byte and one for the end-of-exclusive flag.
As dictated by the Standard MIDI Files specification, two status byte values are legal for a SysexMessage read from a MIDI file:
- 0xF0: System Exclusive message (same as in MIDI wire protocol)
- 0xF7: Special System Exclusive message
When Java Sound is used to handle system exclusive data that is being received using MIDI wire protocol, it should place the data in one or more SysexMessages. In this case, the length of the system exclusive data is not known in advance; the end of the system exclusive data is marked by an end-of-exclusive flag (0xF7) in the MIDI wire byte stream.
- 0xF0: System Exclusive message (same as in MIDI wire protocol)
- 0xF7: End of Exclusive (EOX)
The first SysexMessage object containing data for a particular system exclusive message should have the status value 0xF0. If this message contains all the system exclusive data for the message, it should end with the status byte 0xF7 (EOX). Otherwise, additional system exclusive data should be sent in one or more SysexMessages with a status value of 0xF7. The SysexMessage containing the last of the data for the system exclusive message should end with the value 0xF7 (EOX) to mark the end of the system exclusive message.
If system exclusive data from SysexMessages objects is being transmitted using MIDI wire protocol, only the initial 0xF0 status byte, the system exclusive data itself, and the final 0xF7 (EOX) byte should be propagated; any 0xF7 status bytes used to indicate that a SysexMessage contains continuing system exclusive data should not be propagated via MIDI wire protocol. @author David Rivas @author Kara Kytle @author Florian Bomers

            result = "channel=" + (channel + 1) +
                ",event=" + getChannelMessage(command, data1) +
                ",data1=" + (command == ShortMessage.PROGRAM_CHANGE ? data1 + " " + MidiConstants.getInstrumentName(data1) : String.valueOf(data1)) +
                ",data2=" + data2;
        } else if (midiMessage instanceof SysexMessage) {
            SysexMessage msg = (SysexMessage) midiMessage;
            byte[] data = msg.getData();
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < data.length; i++) {
                sb.append(StringUtil.toHex2(data[i]));
                sb.append(" ");
            }
            result = "channel=n/a" +
                ",event=SYSX" +
                ",data1=" + sb +
                ",data2=";
        } else if (midiMessage instanceof MetaMessage) {
            MetaMessage msg = (MetaMessage) midiMessage;
            int type = msg.getType();
            byte[] data = msg.getData();
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < data.length; i++) {
                sb.append(StringUtil.toHex2(data[i]));
                sb.append(" ");
            }

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            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;

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            }
            return os;
        }


        private static SysexMessage wrapCmd(ByteArrayOutputStream os) throws RemoteMessagingException {
            SysexMessage m = new SysexMessage();
            try {
                os.write(cmdTail);
                m.setMessage(os.toByteArray(), os.size());
                os.close();
            } catch (Exception e) {
                throw new RemoteMessagingException(e.getMessage());
            }
            return m;

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            return m;


        }


        private static SysexMessage wrapChecksummedCmd(ByteArrayOutputStream os) throws RemoteMessagingException {
            SysexMessage m = new SysexMessage();
            try {
                os.write(cmdCSTail);
                m.setMessage(os.toByteArray(), os.size());
                os.close();
            } catch (Exception e) {
                throw new RemoteMessagingException(e.getMessage());
            }
            return m;

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            return m;


        }


        private static SysexMessage wrapChecksummedCmd(ByteArrayOutputStream os, byte cs) throws RemoteMessagingException {
            SysexMessage m = new SysexMessage();
            try {
                //if ( cs < 0)
                //  cs+=128;
                os.write(cs);
                os.write(cmdTail);
                m.setMessage(os.toByteArray(), os.size());
                os.close();
            } catch (Exception e) {
                throw new RemoteMessagingException(e.getMessage());
            }
            return m;

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                        // sys ex
                        int sysexLength = (int) readVarInt();
                        byte[] sysexData = new byte[sysexLength];
                        read(sysexData);


                        SysexMessage sysexMessage = new SysexMessage();
                        sysexMessage.setMessage(status, sysexData, sysexLength);
                        message = sysexMessage;
                        break;


                    case 0xFF:
                        // meta

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                        // sys ex
                        int sysexLength = (int) readVarInt();
                        byte[] sysexData = new byte[sysexLength];
                        read(sysexData);


                        SysexMessage sysexMessage = new SysexMessage();
                        sysexMessage.setMessage(status, sysexData, sysexLength);
                        message = sysexMessage;
                        break;


                    case 0xFF:
                        // meta

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                        // sys ex
                        int sysexLength = (int) readVarInt();
                        byte[] sysexData = new byte[sysexLength];
                        read(sysexData);


                        SysexMessage sysexMessage = new SysexMessage();
                        sysexMessage.setMessage(status, sysexData, sysexLength);
                        message = sysexMessage;
                        break;


                    case 0xFF:
                        // meta

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