How to create a YUV Player with JMF

Question

Hey again,
Just wondering anyone could give me some pointers on how to go about creating a player for raw YUV files. I want to create a player or plugin that will allow the system to play raw YUV files, if given the relevent parameters, frame rate, resolution, YUV subsampling etc,
Thanks,
Stef

Answer 1

Ok, it's a bit course and I am looking into making a much neater version but this is code allows you to play local rawyuv files from a URL. This code is directly based on the "Generate Live Audio/Video Data" Sample Code (thanks again to mok524 for pointing me in this direction)
The code needs to be compiled and then the package 'ie.ucd.delboy' needs to be added to the Protocol Prefix List using the JMF Registry Editor. Then run the JMStudio and go to File>Open URL..
Then type in a URL in the following format:
rawyuv://<<local file location>>:F<<frame>>S<<width>>x<<height>>
example:
rawyuv://C:/my_directory/my_file.yuv:F10S352x176
So Here's the code:
package ie.ucd.delboy.media.protocol.rawyuv;
import javax.media.Time;
import javax.media.MediaLocator;
import javax.media.protocol.*;
import java.io.IOException;
import java.io.*;
import java.util.*;
import java.awt.*;
public class DataSource extends PushBufferDataSource
    protected Object[] controls = new Object[0];
    protected boolean started = false;
    protected String contentType = "raw";
    protected boolean connected = false;
    protected Time duration = DURATION_UNKNOWN;
    protected LiveStream[] streams = null;
    protected LiveStream stream = null;
    public DataSource()
    public String getContentType()
     if(!connected)
         System.err.println("Error: DataSource not connected");
         return null;
     return contentType;
    public void connect() throws IOException
     if(connected)
         return;
     connected = true;
    public void disconnect()
     try
         if(started)
          stop();
     catch(IOException e)
     connected = false;
    public void start() throws IOException
     // we need to throw error if connect() has not been called
     if(!connected)
         throw new java.lang.Error(
          "DataSource must be connected before it can be started");
     if(started)
         return;
     started = true;
     stream.start(true);
    public void stop() throws IOException
     if((!connected) || (!started))
         return;
     started = false;
     stream.start(false);
    public Object[] getControls()
     return controls;
    public Object getControl(String controlType)
     try
         Class cls = Class.forName(controlType);
         Object cs[] = getControls();
         for(int i = 0; i < cs.length; i++)
          if(cls.isInstance(cs))
          return cs[i];
     return null;
     catch(Exception e)
     return null;
public Time getDuration()
     return duration;
private String getFile()
     String url = getLocator().toString();
     int index_of_colon = url.indexOf(':');
     int index_of_last_colon = url.lastIndexOf(':');
     if(index_of_colon==index_of_last_colon)
     index_of_last_colon = url.length();
     String file = url.substring(index_of_colon+3, index_of_last_colon);
     return file;
private float getFrameRate()
     float frame_rate = 15; //15 set as default framerate
     String url = getLocator().toString();
     int index_of_last_colon = url.lastIndexOf(':');
     String params = url.substring(index_of_last_colon+1).toLowerCase();
     if(params.indexOf('f')!=-1)
     int start = params.indexOf('f')+1;
     int end = params.length();
     if(params.indexOf('s') > start)
          end = params.indexOf('s');
     frame_rate = Float.parseFloat(params.substring(start, end));
     return frame_rate;
private Dimension getFrameSize()
     Dimension d = new Dimension(176, 144); //QCIF as default
     String url = getLocator().toString();
     int index_of_last_colon = url.lastIndexOf(':');
     String params = url.substring(index_of_last_colon+1).toLowerCase();
     if(params.indexOf('s')!=-1)
     int start = params.indexOf('s')+1;
     int end = params.length();
     if(params.indexOf('f') > start)
          end = params.indexOf('f');
     String size = params.substring(start, end);
     int x = Integer.parseInt(size.substring(0,size.indexOf('x')));
     int y = Integer.parseInt(size.substring(size.indexOf('x')+1,size.length()));
     d = new Dimension(x, y);
     return d;
public PushBufferStream[] getStreams()
     if(streams == null)
     streams = new LiveStream[1];
     stream = streams[0] = new LiveStream(getFile(), getFrameRate(), getFrameSize());
     return streams;
package ie.ucd.delboy.media.protocol.rawyuv;
import java.awt.Dimension;
import javax.media.*;
import javax.media.format.*;
import javax.media.protocol.*;
import javax.media.protocol.DataSource;
import java.io.IOException;
import java.io.*;
public class LiveStream implements PushBufferStream, Runnable
    protected ContentDescriptor cd = new ContentDescriptor(ContentDescriptor.
     RAW);
    protected int maxDataLength;
    protected byte[] data;
    protected Dimension size;
    protected YUVFormat yuvFormat;
    protected AudioFormat audioFormat;
    protected boolean started;
    protected Thread thread;
    protected float frameRate = 5f;
    protected BufferTransferHandler transferHandler;
    protected Control[] controls = new Control[0];
    private FileInputStream fis = null;
    private FileOutputStream fos = null;
    private boolean EOS = false;
    protected boolean videoData = true;
    public LiveStream(String location, float frame_rate, Dimension frame_size)
     frameRate = frame_rate;
     try
         fis = new FileInputStream(location);
         fos = new FileOutputStream("C:\\stef_temp\\log_data.txt");
     catch(Exception ex)
         System.exit(1);
     int x, y, pos, revpos;
     size = frame_size;
     maxDataLength = size.width * size.height * 3;
     yuvFormat = new YUVFormat(size,
                      maxDataLength,
                      Format.byteArray,
                      frameRate,
                      YUVFormat.YUV_420,
                      size.width,
                      size.width / 2,
                      0,
                      size.height * size.width,
                      size.height * size.width +
                      ((size.height / 2) * (size.width / 2)));
     thread = new Thread(this);
    public ContentDescriptor getContentDescriptor()
     return cd;
    public long getContentLength()
     return LENGTH_UNKNOWN;
    public boolean endOfStream()
     return EOS;
    int seqNo = 0;
    double freq = 2.0;
    public Format getFormat()
     return yuvFormat;
    public void read(Buffer buffer)
     synchronized(this)
         Object outdata = buffer.getData();
         if(outdata == null || !(outdata.getClass() == Format.byteArray) ||
            ((byte[]) outdata).length < maxDataLength)
          outdata = new byte[maxDataLength];
          buffer.setData(outdata);
         buffer.setFormat(yuvFormat);
         buffer.setTimeStamp((long) (seqNo * (1000 / frameRate) * 1000000));
         try
          fos.write(("Bytes left in file: "+fis.available()+"\n").getBytes());
          if(fis.available()==0)
              fos.write("Reached end of file!\n".getBytes());
              fis.close();
              fos.close();
              EOS = true;
          fis.read((byte[]) outdata);
         catch(IOException ex)
         buffer.setSequenceNumber(seqNo);
         buffer.setLength(maxDataLength);
         buffer.setFlags(0);
         buffer.setHeader(null);
         seqNo++;
    public void setTransferHandler(BufferTransferHandler transferHandler)
     synchronized(this)
         this.transferHandler = transferHandler;
         notifyAll();
    public void start(boolean started)
     synchronized(this)
         this.started = started;
         if(started && !thread.isAlive())
          thread = new Thread(this);
          thread.start();
         notifyAll();
    public void run()
     while(started)
         synchronized(this)
          while(transferHandler == null && started)
              try
               wait(1000);
              catch(InterruptedException ie)
         if(started && transferHandler != null)
          transferHandler.transferData(this);
          try
              Thread.currentThread().sleep(10);
          catch(InterruptedException ise)
    public Object[] getControls()
     return controls;
    public Object getControl(String controlType)
     try
         Class cls = Class.forName(controlType);
         Object cs[] = getControls();
         for(int i = 0; i < cs.length; i++)
          if(cls.isInstance(cs))
          return cs[i];
     return null;
     catch(Exception e)
     return null;