Merging and saving audio capture + file from disk

Question

Hi,
I need to combine an audio file (read from disk) with an audio capture from a microphone and save the combined audio to a file.
I created processors for both, merged the data sources and created a processor from the merged data source.
If I use that as an input to a player, it seems to play OK : I hear the combination of the audio file and the microphone over the speakers (albeit with a delay of the microphone input).
But when I try to save this merged processor's data source (I tried 2 different ways based on samples I found) I get the following exceptions respectively
writeToFile
javax.media.NoDataSinkException: Cannot find a DataSink for: com.sun.media.multiplexer.RawBufferMux$RawBufferDataSource@121cc40
     at javax.media.Manager.createDataSink(Manager.java:1894)
     at soundTest.MergeTest4.writeToFile(MergeTest4.java:108)
     at soundTest.MergeTest4.runTest(MergeTest4.java:70)
     at soundTest.MergeTest4.main(MergeTest4.java:207)
writeToFile2:
Unable to handle format: LINEAR, 44100.0 Hz, 16-bit, Stereo, LittleEndian, Signed
Unable to handle format: LINEAR, 44100.0 Hz, 16-bit, Stereo, LittleEndian, Signed, 176400.0 frame rate, FrameSize=32 bits
Failed to realize: com.sun.media.ProcessEngine@691f36
Error: Unable to realize com.sun.media.ProcessEngine@691f36
javax.media.CannotRealizeException
     at javax.media.Manager.blockingCall(Manager.java:2005)
     at javax.media.Manager.createRealizedProcessor(Manager.java:914)
     at soundTest.MergeTest4.saveFile(MergeTest4.java:83)
     at soundTest.MergeTest4.runTest(MergeTest4.java:71)
     at soundTest.MergeTest4.main(MergeTest4.java:208
Here's the code (apologies for heavy use of static and poor error handling)
public class MergeTest4 {
       private static final Format AUDIO_FORMAT = new AudioFormat(AudioFormat.LINEAR);
       private static final int TIME_OUT = 2000;
     private static void runTest() throws Exception {
       DataSource ds1 = getCaptureDataSource();
       DataSource ds2 = Manager.createDataSource(new URL("file:///c:/temp/test.wav"));
       Processor processor1 = Manager.createProcessor(ds1);          
       Processor processor2 = Manager.createProcessor(ds2);  
       configureAndStart(processor1);
       configureAndStart(processor2);
       DataSource[] sources = { processor1.getDataOutput(), processor2.getDataOutput()};
       DataSource mergedDS = Manager.createMergingDataSource(sources);
       Processor mergedProcessor = Manager.createProcessor(mergedDS);    
       configureAndStart(mergedProcessor);
        //This works
        Player player = Manager.createRealizedPlayer(mergedProcessor.getDataOutput());
         player.start();          
         //This does not work
         //  writeToFile(mergedProcessor);
         //  writeToFile2(mergedProcessor);
    private static void writeToFile2(Processor processor) throws Exception {
          ProcessorModel outputPM = new ProcessorModel(processor.getDataOutput(),
                new Format[]{ new AudioFormat(AudioFormat.LINEAR)},
                new FileTypeDescriptor(FileTypeDescriptor.WAVE)
        MediaLocator dest = new MediaLocator("file://./rec.wav");
        Processor outputProcessor = Manager.createRealizedProcessor(outputPM);
        DataSource newDS = outputProcessor.getDataOutput();
        newDS.connect();
        newDS.start();
        DataSink dataSink = Manager.createDataSink(newDS, dest);
        dataSink.open();
        dataSink.start();
      //  dataSink.addDataSinkListener(this);
        outputProcessor.start();
     private static void writeToFile(Processor processor) throws Exception {
          StateHelper sh = new StateHelper(processor);
          if (!sh.realize(10000)) {
               System.exit(-1);
           processor.setContentDescriptor(new FileTypeDescriptor(FileTypeDescriptor.WAVE));
           MediaLocator dest = new MediaLocator("file://c:/temp/foo.wav");
           DataSink filewriter = Manager.createDataSink(processor.getDataOutput(), dest);
           filewriter.open();
           StreamWriterControl swc = (StreamWriterControl) processor.getControl("javax.media.control.StreamWriterControl");
           //set limit to 5MB
           if (swc != null) {
               swc.setStreamSizeLimit(5000000);
           try {
               filewriter.start();
           } catch (IOException e) {
               System.exit(-1);
           // Capture for 20 seconds
           sh.playToEndOfMedia(20000);
           sh.close();
           filewriter.close();
     private static DataSource getCaptureDataSource() {
          try {
               Vector captureDevices = CaptureDeviceManager.getDeviceList(AUDIO_FORMAT);
                CaptureDeviceInfo audiocaptureDevice=null;
                if (captureDevices.size() > 0) {
                     audiocaptureDevice = (CaptureDeviceInfo) captureDevices.get(0);
                } else {
                     System.out.println("Can't find suitable audio capture device.");
                    return null;
                return Manager.createDataSource(audiocaptureDevice.getLocator());
          } catch (Exception ex) {
               ex.printStackTrace();
          return null;
     private static void start(Player player) {
          player.start();
          waitForState(player, Processor.Realized);
     private static void configure(Processor p) {
          p.configure();
          waitForState(p, Processor.Configured);
     private static void configureAndStart(Processor p) {
          p.configure();
          waitForState(p, Processor.Configured);
          start(p);
     private static void waitForState(Player player, int state) {
         if (player.getState() == state) {
             return;
         long startTime = new Date().getTime();
         final Object waitListener = new Object();
         ControllerListener cl = new ControllerListener() {
             @Override
             public void controllerUpdate(ControllerEvent ce) {
                 synchronized (waitListener) {
                     waitListener.notifyAll();
         try {
             player.addControllerListener(cl);
             synchronized (waitListener) {
                 while (player.getState() != state && new Date().getTime() - startTime < TIME_OUT) {
                     try {
                         waitListener.wait(500);
                     } catch (InterruptedException ex) {
                         ex.printStackTrace();
         } finally {
             player.removeControllerListener(cl);
     Any idea what needs to be changed for this to work?
Thanks
Philippe

Answer 1

Drew
Now that you've got as far as doing GUIs, you must learn to read the API. Here/s a link.
Is it something like: out.textBox.text() ??
Not quite. In fact, not at all. The syntax implies that out has a member textBox which in turn has a method text. That's pretty far removed from reality, isn't it?
From the code you posted, you apparently know that out.println(...) takes a String parameter. Now go look up the API and find a method of JTextField that returns a String, that Returns the text contained in this TextComponent.
^Hint: it's a method inherited from JTextComponent^
Get the text from the JTextField and pass it as a parameter to out.println. That's all there is to it.
luck, db
Blasted multiposter didn't have the decency to indicate here that the immediate problem was resolved, just went ahead and started a [new thread|http://forum.java.sun.com/thread.jspa?threadID=5282987].
One for the little black book.
Edited by: Darryl.Burke