Problem with cloning a DataSource

Question

Hello!!
I have cloned a DataSource and used the cloned DataSource(not the original DataSource which i used for cloning) for transmitting via RTP. I don get any exception or any error but the audio isn't getting transmitted.
(I tried receiving the transmitted audio stream using JMF.. But JMF doesn't detect any)
However when i use the DataSource(which i used for cloning) it worked..
dl=CaptureDeviceManager.getDeviceList(new AudioFormat(AudioFormat.LINEAR));
ml=((CaptureDeviceInfo)dl.firstElement()).getLocator();
+staticsource=Manager.createCloneableDataSource(Manager.createDataSource(ml));             //staticsource has been declared as static and i tried to clone it to produce new DataSources whenever i need+
source=((SourceCloneable)staticsource).createClone();
+p=Manager.createProcessor(source);           
// I tried using staticsource and it worked but i need to get it right using the cloned one..+
I think i have explained my problem pretty clearly.. Sorry if i din..
Thanks!!
Edited by: s.baalajee on Jun 2, 2009 9:08 AM

Answer 1

Thanks for the help sir.. I read a previous post of yours which helped me to track down the mistake.. It was a small mistake in my logic.. I had not used the DataSource I used for cloning to create the processor(which means I din use it)..
When I used that also to create processor the clones produced from that DataSource worked.. I have posted the modified code below..
Edited by: s.baalajee on Jun 3, 2009 11:02 PM
/*This program is to capture audio and send it to another system*/
//package AudioChat;
import java.awt.*;
import java.net.*;
import javax.media.*;
import java.awt.event.*;
import javax.swing.*;
import javax.media.format.*;
import javax.media.protocol.*;
import javax.media.control.*;
import java.util.*;
public class ATransmit extends JDialog implements ControllerListener
     Processor p=null;
     DataSink sink;
     MediaLocator ml;
     static DataSource staticsource=null;     
     DataSource source;          
     String cip,cun;
     Panel panel;
     int port;
     static boolean audioinuse;
     //     audioinuse will be false for the first time only
     public ATransmit(String c,JFrame f,MediaLocator medialocator,int po,String un,boolean audio)
          super(f,"Audio Chat "+un);
          cip=c;cun=un;
          port=po;
          audioinuse=audio;
          System.out.println("CIP :"+cip);
          setVisible(true);
          setBounds(600,50,300,75);
          setResizable(false);
          setLayout(new GridLayout(1,1));
          panel=new Panel();
          panel.setBackground(Color.BLACK);
          panel.setLayout(new BorderLayout());
          add(panel);
          addWindowListener(new WindowAdapter()
               public void windowClosing(WindowEvent we)
                    stopEverything();     //     stops the DataSink and the Processor
          setDefaultCloseOperation(DISPOSE_ON_CLOSE);
// For the first time alone I create the DataSource(staticsource) from the MediaLocator and use it to create the processor
//For the subsequent times I create Clones of staticsource and use it to create the Processor
          try
               if(!audioinuse)
                    System.out.println("Initializing all components");
                    ml=medialocator;
                    Manager.setHint(Manager.LIGHTWEIGHT_RENDERER,true);
                    staticsource=Manager.createCloneableDataSource(Manager.createDataSource(ml));
                    p=Manager.createProcessor(staticsource);          
               else
                    source=((SourceCloneable)staticsource).createClone();
                    p=Manager.createProcessor(source);     
               p.addControllerListener(this);
               p.configure();
               Thread.sleep(500);
               p.setContentDescriptor(new ContentDescriptor(ContentDescriptor.RAW_RTP));
               if(encode(p))
                    p.realize();
               else
                    System.out.println(“Encoding failed”);
               Thread.sleep(500);
          catch (Exception e)
               System.err.println("Got exception "+e);
     public boolean encode(Processor p)
          TrackControl track[] = p.getTrackControls();
          boolean encodingOk = false;
          for (int i = 0; i < track.length; i++)
               if (!encodingOk && track[i] instanceof FormatControl)
                    if (((FormatControl)track).setFormat( new AudioFormat(AudioFormat.DVI_RTP)) == null)
                         track[i].setEnabled(false);
                    else
                         encodingOk = true;
               else
                    track[i].setEnabled(false);
          return encodingOk;
     public synchronized void controllerUpdate(ControllerEvent ce)
          try
               if (ce instanceof RealizeCompleteEvent)
                    Component comp;
                    System.out.println("Realized");     
                    sink=Manager.createDataSink(p.getDataOutput(), new MediaLocator("rtp://"+cip+":"+(15000+port)+"/audio"));
                    if ((comp=p.getControlPanelComponent()) != null)
                         panel.add(BorderLayout.SOUTH,comp);
                    startEverything();     //     start the DataSink and the Processor
                    validate();
                    System.out.println("Updated");
          catch(Exception e)
               System.out.println("Exception rasied "+e);
     void startEverything()
          try
               sink.open();sink.start();
               p.start();
          catch(Exception e)
               System.out.println("Got Exception :"+e);
     void stopEverything()
          try
               if(p!=null)
                    p.stop();
               if(sink!=null)
                    sink.stop();
                    sink.close();
               if(p!=null)
                    p.deallocate();
                    p.close();
          catch(Exception e)
               System.out.println("Got Exception :"+e);
     public static void main(String s[])
          Vector dl;
          MediaLocator ml;
          JFrame frame=new JFrame();
          frame.setBounds(400,400,400,400);
          frame.setVisible(true);
          dl=CaptureDeviceManager.getDeviceList(new AudioFormat(AudioFormat.LINEAR));     
          ml=((CaptureDeviceInfo)dl.firstElement()).getLocator();
          new ATransmit("192.192.175.64",frame,ml,0,"s.baalajee",false);               //Note the last argument is false
          new ATransmit("192.192.175.64",frame,ml,100,"s.baalajee",true);     
          new ATransmit("192.192.175.64",frame,ml,200,"s.baalajee",true);     
          new ATransmit("192.192.175.64",frame,ml,300,"s.baalajee",true);     
Edited by: s.baalajee on Jun 3, 2009 11:04 PM