Brico

Hallo, I was sick and tired of the slow, cumbersome spigot~ way of playing mp3s so I developed my own (slighty shonky) mxj~ object to stream mp3s from disk, using jLayer. Don't know if anyone else will find this useful, but below is the download link. The rar contains the .class, the required .jar file, the source, and an example (max5).

It's pretty feature slim - play pause seek - but it's good for what I need it for. If anyone fancies improving/extending it, pm me and i'll do my best to explain the code (obviously it's not commented).

Hallo, I was sick and tired of the slow, cumbersome spigot~ way of playing mp3s so I developed my own (slighty shonky) mxj~ object to stream mp3s from disk, using jLayer. Don't know if anyone else will find this useful, but below is the download link. The rar contains the .class, the required .jar file, the source, and an example (max5).
It's pretty feature slim - play pause seek - but it's good for what I need it for. If anyone fancies improving/extending it, pm me and i'll do my best to explain the code (obviously it's not commented).

sharefunshare-mp3-play-mxj-object

Hey, I'd love to play around with this. The link is broken, though - is there a new url?

Sure! I'll update the link, let me know if you need help. Make sure you read the install.txt cos it contains the example code.

I've tried to use your library, 've followed the install.txt but something goes wrong (see below)

java.lang.UnsupportedClassVersionError: Bad version number in .class file

    at java.lang.ClassLoader.defineClass1(Native Method)

    at java.lang.ClassLoader.defineClass(ClassLoader.java:676)

    at com.cycling74.max.MXJClassLoaderImpl.doLoadClass(MXJClassLoaderImpl.java:119)

    at com.cycling74.max.MXJClassLoader.loadClazz(MXJClassLoader.java:88)

The mistake is that there is no code in the file mp3play.java

Does someone have successfully use the object of Brico or find an other way to read mp3 (except import in buffer or the use of spigot).

java.lang.UnsupportedClassVersionError: Bad version number in .class file
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:676)
	at com.cycling74.max.MXJClassLoaderImpl.doLoadClass(MXJClassLoaderImpl.java:119)
	at com.cycling74.max.MXJClassLoader.loadClazz(MXJClassLoader.java:88)
Could not load class 'mp3play'

Does someone have successfully use the object of Brico or find an other way to read mp3 (except import in buffer or the use of spigot).
Best


oh shit, sorry i've only just noticed this! if you still need it (although it was 8 months ago you've probably moved on), i'll do my best to help you.

looking at the error you got - is your version of java up-to-date? And about the empty source file, here it is:

import javazoom.jl.decoder.JavaLayerException;

public class mp3play extends MSPPerformer {

    private RandomAccessFileInputStream in = null;

    short[] sampsL = new short[44100];

    short[] sampsR = new short[44100];

    private static final String[] INLET_ASSIST = new String[] { "messages in" };

    private static final String[] OUTLET_ASSIST = new String[] { "(signal) Channel 1 Output", "(signal) Channel 2 Output", "File position (ms)", "Info Outlet" };

        declareInlets(new int[] { DataTypes.ALL });

        declareOutlets(new int[] { SIGNAL, SIGNAL, DataTypes.FLOAT, DataTypes.ALL });

        setInletAssist(INLET_ASSIST);

        setOutletAssist(OUTLET_ASSIST);

            public void run() {

                while (1 == 1) {

                    while (playing == 1) {

                        int diff = 0;

                        if (recPos < playPos)

                            diff = recPos - playPos + sampsL.length;

                        else

                            diff = recPos - playPos;

                        if (diff + decoder.getOutputBlockSize()

                            try {

                                short[] frame = decodeFrame();

                                if (frame != null) {

                                    {

                                        for (int i = 0; i < frame.length / 2; i++) {

                                            sampsL[recPos] = frame[i * 2];

                                            sampsR[recPos] = frame[i * 2 + 1];

                                            recPos++;

                                            recPos %= sampsL.length;

                                        }

                                        filePosMS += currFrame.ms_per_frame();

                                    }

                                } else {

                                    if (looping) {

                                        seek(0);

                                    } else

                                        playing = 0;

                                }

                            } catch (JavaLayerException e) {

                            }

                        outlet(2, filePosMS);

                        try {

                            Thread.sleep(20);

                        } catch (InterruptedException e) {

                    }

                    try {

                        Thread.sleep(20);

                    } catch (InterruptedException e) {

            in = new RandomAccessFileInputStream(new File(name));

        } catch (FileNotFoundException e) {

            outlet(3, new Atom[] { Atom.newAtom("error"), Atom.newAtom("filenotfound") });

            File f = new File(filename);

            decoder = new Decoder();

            bitstream = new Bitstream(in);

            if (in != null) {

                playing = i;

    public void seek(float endPosMS) throws JavaLayerException {

        if (currFrame != null && in != null) {

            int offset = (int) (endPosMS / currFrame.ms_per_frame()) * currFrame.calculate_framesize();

                in.seek((long) (offset));

                filePosMS = currFrame.total_ms(offset);

            } catch (IOException e) {

        bitstream = new Bitstream(in);

    public void perform(MSPSignal[] in, MSPSignal[] out) {

            if (recPos < playPos)

                diff = recPos - playPos + sampsL.length;

                diff = recPos - playPos;

                for (int i = 0; i < L.length; i++) {

                    L[i] = (float) sampsL[playPos] / (float) Short.MAX_VALUE;

                    R[i] = (float) sampsR[playPos] / (float) Short.MAX_VALUE;

                    playPos += 1;

                    if (playPos >= sampsL.length)

                        playPos = 0;

                    L[i] = R[i] = 0;

            for (int i = 0; i < L.length; i++) {

                L[i] = R[i] = 0;

    protected short[] decodeFrame() throws JavaLayerException {

            if (decoder == null)

                return null;

            if (bitstream == null)

            Header h = bitstream.readFrame();

                outlet(3, "done");

                currFrame = h;

            SampleBuffer output = (SampleBuffer) decoder.decodeFrame(currFrame, bitstream);

            short[] samps = output.getBuffer();

            bitstream.closeFrame();

        } catch (RuntimeException e) {

            throw new JavaLayerException("Exception decoding audio frame", e);

            float lengthMS = currFrame.total_ms((int) f.length());

            int frequency = currFrame.frequency();

            int bitRate = currFrame.bitrate() / 1000;

            outlet(3, new Atom[] { Atom.newAtom("filename"), Atom.newAtom(filename) });

            outlet(3, new Atom[] { Atom.newAtom("samplerate"), Atom.newAtom(frequency) });

            outlet(3, new Atom[] { Atom.newAtom("bitrate"), Atom.newAtom(bitRate + "Kbps") });

            outlet(3, new Atom[] { Atom.newAtom("length"), Atom.newAtom(lengthMS) });

            outlet(3, new Atom[] { Atom.newAtom("error"), Atom.newAtom("nofileopen") });

oh shit, sorry i've only just noticed this! if you still need it (although it was 8 months ago you've probably moved on), i'll do my best to help you.
looking at the error you got - is your version of java up-to-date? And about the empty source file, here it is:

import com.cycling74.max.*;
import com.cycling74.msp.*;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.RandomAccessFile;

import javazoom.jl.decoder.Bitstream;
import javazoom.jl.decoder.Decoder;
import javazoom.jl.decoder.Header;
import javazoom.jl.decoder.JavaLayerException;
import javazoom.jl.decoder.SampleBuffer;

public class mp3play extends MSPPerformer {
	Thread t;
	String filename;
	Header currFrame;

	private Bitstream bitstream;
	private Decoder decoder;
	private RandomAccessFileInputStream in = null;

	short[] sampsL = new short[44100];
	short[] sampsR = new short[44100];

	private float filePosMS = 0;
	private int recPos = 0;
	private int playPos = 0;
	private int playing = 0;
	private boolean looping = false;

	private static final String[] INLET_ASSIST = new String[] { "messages in" };

	private static final String[] OUTLET_ASSIST = new String[] { "(signal) Channel 1 Output", "(signal) Channel 2 Output", "File position (ms)", "Info Outlet" };

	public mp3play() {
		declareInlets(new int[] { DataTypes.ALL });
		declareOutlets(new int[] { SIGNAL, SIGNAL, DataTypes.FLOAT, DataTypes.ALL });

		setInletAssist(INLET_ASSIST);
		setOutletAssist(OUTLET_ASSIST);

		t = new Thread() {
			public void run() {
				while (1 == 1) {
					while (playing == 1) {
						int diff = 0;
						if (recPos < playPos)
							diff = recPos - playPos + sampsL.length;
						else
							diff = recPos - playPos;

						if (diff + decoder.getOutputBlockSize()
							try {
								short[] frame = decodeFrame();

								if (frame != null) {
									{
										for (int i = 0; i < frame.length / 2; i++) {
											sampsL[recPos] = frame[i * 2];
											sampsR[recPos] = frame[i * 2 + 1];

											recPos++;
											recPos %= sampsL.length;
										}
										filePosMS += currFrame.ms_per_frame();

									}
								} else {
									if (looping) {
										seek(0);
									} else
										playing = 0;
								}

							} catch (JavaLayerException e) {
							}
						}

						try {
							Thread.sleep(20);
						} catch (InterruptedException e) {
						}
					}

					try {
						Thread.sleep(20);
					} catch (InterruptedException e) {
					}

	public void open(String name) {
		in = null;
		playing = 0;
		try {
			in = new RandomAccessFileInputStream(new File(name));

		} catch (FileNotFoundException e) {
			outlet(3, new Atom[] { Atom.newAtom("error"), Atom.newAtom("filenotfound") });
		}

		if (in != null) {
			filePosMS = 0;
			recPos = 0;
			playPos = 0;
			filename = name;
			File f = new File(filename);
			decoder = new Decoder();
			bitstream = new Bitstream(in);
		} else
			playing = 0;
	}

	public void inlet(int i) {
		int inlet = getInlet();
		if (inlet == 0) {
			if (in != null) {
				playing = i;
			}
		}
	}

	public void seek(float endPosMS) throws JavaLayerException {
		playing = 0;
		recPos = 0;
		playPos = 0;
		if (currFrame != null && in != null) {
			int offset = (int) (endPosMS / currFrame.ms_per_frame()) * currFrame.calculate_framesize();
			try {
				in.seek((long) (offset));
				filePosMS = currFrame.total_ms(offset);
			} catch (IOException e) {
			}
		}

		decoder = new Decoder();
		bitstream = new Bitstream(in);
		playing = 1;
	}

	public void perform(MSPSignal[] in, MSPSignal[] out) {
		float[] L = out[0].vec;
		float[] R = out[1].vec;

		if (playing == 1) {
			int diff = 0;
			if (recPos < playPos)
				diff = recPos - playPos + sampsL.length;
			else
				diff = recPos - playPos;

			if (diff > 0) {
				for (int i = 0; i < L.length; i++) {
					L[i] = (float) sampsL[playPos] / (float) Short.MAX_VALUE;
					R[i] = (float) sampsR[playPos] / (float) Short.MAX_VALUE;

					playPos += 1;
					if (playPos >= sampsL.length)
						playPos = 0;
				}
			} else {
				for (int i = 0; i < L.length; i++) {
					L[i] = R[i] = 0;
				}
			}
		} else {
			for (int i = 0; i < L.length; i++) {
				L[i] = R[i] = 0;
			}
		}
	}

	protected short[] decodeFrame() throws JavaLayerException {
		try {
			if (decoder == null)
				return null;
			if (bitstream == null)
				return null;

			Header h = bitstream.readFrame();
			if (h == null) {
				outlet(3, "done");
				return null;
			} else
				currFrame = h;

			SampleBuffer output = (SampleBuffer) decoder.decodeFrame(currFrame, bitstream);
			short[] samps = output.getBuffer();
			bitstream.closeFrame();

			return samps;
		} catch (RuntimeException e) {
			throw new JavaLayerException("Exception decoding audio frame", e);
		}
	}

	public void info() {
		if (in != null) {
			File f = new File(filename);
			float lengthMS = currFrame.total_ms((int) f.length());
			int frequency = currFrame.frequency();
			int bitRate = currFrame.bitrate() / 1000;
			outlet(3, new Atom[] { Atom.newAtom("filename"), Atom.newAtom(filename) });
			outlet(3, new Atom[] { Atom.newAtom("samplerate"), Atom.newAtom(frequency) });
			outlet(3, new Atom[] { Atom.newAtom("bitrate"), Atom.newAtom(bitRate + "Kbps") });
			outlet(3, new Atom[] { Atom.newAtom("length"), Atom.newAtom(lengthMS) });
		} else
			outlet(3, new Atom[] { Atom.newAtom("error"), Atom.newAtom("nofileopen") });
	}

	public void loop(int i) {
		if (i == 1)
			looping = true;
		else
			looping = false;
	}

	public void notifyDeleted() {
		t.stop();
		t = null;
	}
}


I tried starting "fresh" and loaded the above source into an [mxj quickie mp3play] object, and tried to compile. Before starting max, I put the RandomAccessFileInputStream.class into the Max "class" directory. This compile failed:

/Applications/Max5/Cycling '74/java/classes/mp3play.java[ 25 ] cannot access RandomAccessFileInputStream
bad class file: /Applications/Max5/Cycling '74/java/classes/RandomAccessFileInputStream.class
class file has wrong version 50.0, should be 49.0
Please remove or make sure it appears in the correct subdirectory of the classpath.
private RandomAccessFileInputStream in = null;
        ^
1 error
[ Dec 1, 2010 7:39:44 AM ]
 compilation of /Applications/Max5/Cycling '74/java/classes/mp3play.java failed.

I think the problem is that the RandomAccessFileInputStream class is compiled with an old version of java. If the source for that is available, it could be recompiled, and maybe get this baby working!

public class RandomAccessFileInputStream extends InputStream {

    public RandomAccessFileInputStream(File file) throws FileNotFoundException {

        raf = new RandomAccessFile(file, "r");

     * Skip ahead in the file by the specified bytes.

    synchronized public void seek(long bytes) throws IOException {

    synchronized public void skipForward(long bytes) throws IOException {

        raf.skipBytes((int) bytes);

     * Skip backward in the file by the specified bytes.

    synchronized public void skipBackward(long bytes) throws IOException {

        long pos = raf.getFilePointer() - bytes;

     * Returns the current position within the file.

    public long getPosition() throws IOException {

        return raf.getFilePointer();

     * Returns the current position within the file as a percentage String.

    public String getPercentage() throws IOException {

        int pos = (int) ((((float) raf.getFilePointer()) / ((float) raf

                .length())) * 100);

            return "0" + pos + "%";

            return pos + "%";

     * Returns the length of the file in bytes.

    public long getLength() throws IOException {

    synchronized public int read() throws IOException {

    synchronized public int read(byte[] b) throws IOException {

    synchronized public int read(byte[] b, int off, int len) throws IOException {

        return raf.read(b, off, len);

    synchronized public long skip(long n) throws IOException {

        long left = raf.length() - raf.getFilePointer();

        return raf.skipBytes((int) n);

    public int available() throws IOException {

    public void close() throws IOException {

    public void mark(int readlimit) {

    public void reset() throws IOException {

public class RandomAccessFileInputStream extends InputStream {
	private RandomAccessFile raf;

	public RandomAccessFileInputStream(File file) throws FileNotFoundException {
		raf = new RandomAccessFile(file, "r");
	}

	/**
	 * Skip ahead in the file by the specified bytes.
	 */
	synchronized public void seek(long bytes) throws IOException {
		raf.seek((int) bytes);
	}

	/**
	 * Skip ahead in the file by the specified bytes.
	 */
	synchronized public void skipForward(long bytes) throws IOException {
		raf.skipBytes((int) bytes);
	}

	/**
	 * Skip backward in the file by the specified bytes.
	 */
	synchronized public void skipBackward(long bytes) throws IOException {
		long pos = raf.getFilePointer() - bytes;

	/**
	 * Returns the current position within the file.
	 */
	public long getPosition() throws IOException {
		return raf.getFilePointer();
	}

	/**
	 * Returns the current position within the file as a percentage String.
	 */
	public String getPercentage() throws IOException {
		int pos = (int) ((((float) raf.getFilePointer()) / ((float) raf
				.length())) * 100);

		if (pos < 10)
			return "0" + pos + "%";
		else
			return pos + "%";

	/**
	 * Returns the length of the file in bytes.
	 */
	public long getLength() throws IOException {
		return raf.length();
	}

	// ----------------------------
	// InputStream methods:
	synchronized public int read() throws IOException {
		return raf.read();
	}

	synchronized public int read(byte[] b) throws IOException {
		return raf.read(b);
	}

	synchronized public int read(byte[] b, int off, int len) throws IOException {
		return raf.read(b, off, len);
	}

[sharefunshare] mp3 play mxj~ object