Capture Audio from Line-In or Mic (no CaptureDevice)

Question

Hi,
I'm trying to capture Audio Data from my SoundCard, but I don't know how to find the correct CaptureDevice (or even ANY CaptureDevice...)
I'm using JMF 2.1.1 (all-java) this is my test code:
     public static void main(String[] args) {
          try {
               //Fallback error sound
               MediaLocator errorSound = new MediaLocator(new File("error.wav").toURL());
               //Find Capture Device
               Format captureFormat = new AudioFormat(AudioFormat.LINEAR, 44100, 16, 2);
               boolean capDevFound = false;
               CaptureDeviceInfo di = null;
               Vector deviceList = CaptureDeviceManager.getDeviceList(captureFormat);
               if (deviceList.size() > 0) {
                    System.out.println("- devices -");
                    for (int i=0; i<deviceList.size(); i++) {
                         di = (CaptureDeviceInfo)deviceList.get(i);
                         System.out.println(di.getName());
                    di = (CaptureDeviceInfo)deviceList.firstElement();
                    capDevFound = true;
               } else {
                    System.out.println("No Capture Device found");
               //Playback captured audio or error sound
               MediaLocator ml = capDevFound
                                     ? di.getLocator()
                                     : errorSound;
               DataSource ds = Manager.createDataSource(ml);
               Player pl = Manager.createPlayer(ds);
               ControllerState playerState = new ControllerState();
               playerState.exitOnEOM = true;
               //The Realizer class implements the blocking realize and prefetching I found in the tutorials...
               Realizer realizer = new Realizer(playerState);
               pl.addControllerListener(realizer);
               realizer.realizePlayer(pl);
               realizer.prefetchPlayer(pl);
               System.out.println("- start -");
               pl.start();
          } catch (Exception e) {
               e.printStackTrace();
     }I always get a "no capture device found" and hear my error sound!
Could a wrong Format in getDeviceList(..) be the reason for this? Or should I better use a native version of JMF instead of the pure java one?
Any Hints?
Thanks in advance,
lupo

Answer 1

From the JMF javaDocs for CaptureDeviceManager
public static java.util.Vector getDeviceList(Format format)Gets a list of CaptureDeviceInfo objects that correspond to devices that can capture data in the specified Format. If no Format is specified, this method returns a list of CaptureDeviceInfo objects for all of the available capture devices
So
CaptureDeviceManager.getDeviceList(null);
will return ALL available capture devices - this is as described in SUN code examples & does indeed work
re
javax.media.format.AudioFormat
does not provide a parameterless constructor
OOPS sorry - didn't check before posting