Examples with MidiEvent javax.sound.midi.MidiEvent used on opensource projects

Example 1 with MidiEvent

use of javax.sound.midi.MidiEvent in project jdk8u_jdk by JetBrains.

the class SoftMidiAudioFileReader method getAudioInputStream.

public AudioInputStream getAudioInputStream(Sequence seq) throws UnsupportedAudioFileException, IOException {
    AudioSynthesizer synth = (AudioSynthesizer) new SoftSynthesizer();
    AudioInputStream stream;
    Receiver recv;
    try {
        stream = synth.openStream(format, null);
        recv = synth.getReceiver();
    } catch (MidiUnavailableException e) {
        throw new IOException(e.toString());
    }
    float divtype = seq.getDivisionType();
    Track[] tracks = seq.getTracks();
    int[] trackspos = new int[tracks.length];
    int mpq = 500000;
    int seqres = seq.getResolution();
    long lasttick = 0;
    long curtime = 0;
    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;
                }
            }
        }
        if (seltrack == -1)
            break;
        trackspos[seltrack]++;
        long tick = selevent.getTick();
        if (divtype == Sequence.PPQ)
            curtime += ((tick - lasttick) * mpq) / seqres;
        else
            curtime = (long) ((tick * 1000000.0 * divtype) / seqres);
        lasttick = tick;
        MidiMessage msg = selevent.getMessage();
        if (msg instanceof MetaMessage) {
            if (divtype == Sequence.PPQ) {
                if (((MetaMessage) msg).getType() == 0x51) {
                    byte[] data = ((MetaMessage) msg).getData();
                    if (data.length < 3) {
                        throw new UnsupportedAudioFileException();
                    }
                    mpq = ((data[0] & 0xff) << 16) | ((data[1] & 0xff) << 8) | (data[2] & 0xff);
                }
            }
        } else {
            recv.send(msg, curtime);
        }
    }
    long totallen = curtime / 1000000;
    long len = (long) (stream.getFormat().getFrameRate() * (totallen + 4));
    stream = new AudioInputStream(stream, stream.getFormat(), len);
    return stream;
}

Example 2 with MidiEvent

use of javax.sound.midi.MidiEvent in project jdk8u_jdk by JetBrains.

the class SMFParser method readTrack.

void readTrack(Track track) throws IOException, InvalidMidiDataException {
    try {
        // reset current tick to 0
        long tick = 0;
        // reset current status byte to 0 (invalid value).
        // this should cause us to throw an InvalidMidiDataException if we don't
        // get a valid status byte from the beginning of the track.
        int status = 0;
        boolean endOfTrackFound = false;
        while (!trackFinished() && !endOfTrackFound) {
            MidiMessage message;
            // initialize to invalid value
            int data1 = -1;
            int data2 = 0;
            // each event has a tick delay and then the event data.
            // first read the delay (a variable-length int) and update our tick value
            tick += readVarInt();
            // check for new status
            int byteValue = readUnsigned();
            if (byteValue >= 0x80) {
                status = byteValue;
            } else {
                data1 = byteValue;
            }
            switch(status & 0xF0) {
                case 0x80:
                case 0x90:
                case 0xA0:
                case 0xB0:
                case 0xE0:
                    // two data bytes
                    if (data1 == -1) {
                        data1 = readUnsigned();
                    }
                    data2 = readUnsigned();
                    message = new FastShortMessage(status | (data1 << 8) | (data2 << 16));
                    break;
                case 0xC0:
                case 0xD0:
                    // one data byte
                    if (data1 == -1) {
                        data1 = readUnsigned();
                    }
                    message = new FastShortMessage(status | (data1 << 8));
                    break;
                case 0xF0:
                    // sys-ex or meta
                    switch(status) {
                        case 0xF0:
                        case 0xF7:
                            // 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
                            int metaType = readUnsigned();
                            int metaLength = (int) readVarInt();
                            final byte[] metaData;
                            try {
                                metaData = new byte[metaLength];
                            } catch (final OutOfMemoryError oom) {
                                throw new IOException("Meta length too big", oom);
                            }
                            read(metaData);
                            MetaMessage metaMessage = new MetaMessage();
                            metaMessage.setMessage(metaType, metaData, metaLength);
                            message = metaMessage;
                            if (metaType == 0x2F) {
                                // end of track means it!
                                endOfTrackFound = true;
                            }
                            break;
                        default:
                            throw new InvalidMidiDataException("Invalid status byte: " + status);
                    }
                    // switch sys-ex or meta
                    break;
                default:
                    throw new InvalidMidiDataException("Invalid status byte: " + status);
            }
            // switch
            track.add(new MidiEvent(message, tick));
        }
    // while
    } catch (ArrayIndexOutOfBoundsException e) {
        if (DEBUG)
            e.printStackTrace();
        // fix for 4834374
        throw new EOFException("invalid MIDI file");
    }
}

Example 3 with MidiEvent

use of javax.sound.midi.MidiEvent in project jdk8u_jdk by JetBrains.

the class StandardMidiFileWriter method writeTrack.

private InputStream writeTrack(Track track, int type) throws IOException, InvalidMidiDataException {
    int bytesWritten = 0;
    int lastBytesWritten = 0;
    int size = track.size();
    PipedOutputStream thpos = new PipedOutputStream();
    DataOutputStream thdos = new DataOutputStream(thpos);
    PipedInputStream thpis = new PipedInputStream(thpos);
    ByteArrayOutputStream tdbos = new ByteArrayOutputStream();
    tddos = new DataOutputStream(tdbos);
    ByteArrayInputStream tdbis = null;
    SequenceInputStream fStream = null;
    long currentTick = 0;
    long deltaTick = 0;
    long eventTick = 0;
    int runningStatus = -1;
    // -----------------------------
    for (int i = 0; i < size; i++) {
        MidiEvent event = track.get(i);
        int status;
        int eventtype;
        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
                // length value, so we can just write the data
                // here.  note that we must _always_ write the
                // status byte, regardless of runningStatus.
                runningStatus = status;
                tddos.write(data, 0, data.length);
                bytesWritten += data.length;
                break;
            case IGNORE:
                // ignore this event
                break;
            case ERROR:
                // ignore this event
                break;
            default:
                throw new InvalidMidiDataException("internal file writer error");
        }
    }
    // ---------------------------------
    // End write each event in the track
    // ---------------------------------
    // Build Track header now that we know length
    thdos.writeInt(MTrk_MAGIC);
    thdos.writeInt(bytesWritten);
    bytesWritten += 8;
    // Now sequence them
    tdbis = new ByteArrayInputStream(tdbos.toByteArray());
    fStream = new SequenceInputStream(thpis, tdbis);
    thdos.close();
    tddos.close();
    return fStream;
}