Name: ipR10067 Date: 07/11/2002


Method javax.sound.sampled.Mixer.getLine(Line.Info info) throws
unexpected ArrayIndexOutOfBoundsException on Windows NT (and Win 2000)
if no sound card installed in the system or sound device is disabled
(through "control panel").


Run the following test example to reproduce the bug:

======================== getLineTests.java ===================================
package test_sampled_Mixer;
import javax.sound.sampled.*;

public class getLineTests {

    public static void main(String argv[]) {
        getLineTests test = new getLineTests();
        test.run();
        System.exit(0);
    }

    public void run() {
    
        Mixer.Info[] installedMixersInfo = AudioSystem.getMixerInfo();
        
          
        if ( installedMixersInfo.length == 0 ) {
            System.out.println("there are no mixers installed on the system. It's OK");
            return;
        }
    
        Mixer testedMixer = null;

        for (int i=0; i < installedMixersInfo.length; i++) {
            try {
                testedMixer = AudioSystem.getMixer(installedMixersInfo[i]);
                System.out.println("Mixer = " + testedMixer);

            } catch (SecurityException securityException) {
                 System.out.println("installed Mixer is unavailable because of security restrictions");
                 return;
            } catch (Throwable thrown) {
                System.out.println("AudioSystem.getMixer() threw unexpected exception:");
                thrown.printStackTrace(System.out);
                return;
            }
    
            Line.Info producedLineInfo[] = null;
            try {
                producedLineInfo = testedMixer.getSourceLineInfo();
            } catch (Throwable thrown) {
                System.out.println("Mixer.getSourceLineInfo() threw unexpected exception:");
                thrown.printStackTrace(System.out);
                return;
            }

            System.out.println(" length of producedLineInfo =" + producedLineInfo.length);

            for (int j=0; j < producedLineInfo.length; j++) {

                Line.Info testLineInfo = producedLineInfo[j];
                System.out.println(" Line.Info = " + testLineInfo);

                Line producedLine;

                try {
                    producedLine = testedMixer.getLine(testLineInfo);
                    System.out.println(" producedLine = " + producedLine);

                } catch (LineUnavailableException lineUnavailableException) {
                    System.out.println("line is not available due to resource restrictions");
                    return;
                } catch (SecurityException securityException) {
                     System.out.println("line is not available due to security restrictions");
                     return;

                } catch (Throwable thrown) {
                    System.out.println(" testedMixer.getLine(testLineInfo) threw unexpected exception:");
                    thrown.printStackTrace(System.out);
                    return;
                }

                if ( producedLine == null ) {
                    System.out.println(" Mixer.getLine(Line.Info) failed:");
                    System.out.println(" returned Line = null");
                    return;
                }
          
            } //for j

        } //for i

    return;

    }
    
}

class GetLineLine implements Line {

    public void addLineListener(LineListener listener) {
    }

    public void close() {
    }

    public Control getControl(Control.Type control) {
        return null;
    }

    public Control[] getControls() {
        return new Control[0];
    }

    public Line.Info getLineInfo() {
        return null;
    }

    public boolean isOpen() {
        return false;
    }

    public boolean isControlSupported(Control.Type control) {
        return false;
    }

    public void open() {
    }

    public void removeLineListener(LineListener listener) {
    }
}


============================log=======================================

V:>set CLASSPATH=.

V:>D:\Java\JDK1.492\win\bin\javac -d . getLineTests.java

V:>D:\Java\JDK1.492\win\bin\java -version
java version "1.4.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-b92)
Java HotSpot(TM) Client VM (build 1.4.0-b92, mixed mode)

V:>D:\Java\JDK1.492\win\bin\java test_sampled_Mixer.getLineTests
Mixer = com.sun.media.sound.HeadspaceMixer@dd20f6
  length of producedLineInfo =2
  Line.Info = interface SourceDataLine supporting 8 audio formats
    producedLine = com.sun.media.sound.MixerSourceLine@e83912
  Line.Info = interface Clip supporting 8 audio formats, and buffers of 0 to 4194304 bytes
    producedLine = com.sun.media.sound.MixerClip@d8957f
Mixer = com.sun.media.sound.SimpleOutputDevice@fa3ac1
  length of producedLineInfo =1
  Line.Info = interface SourceDataLine
 testedMixer.getLine(testLineInfo) threw unexpected exception:
java.lang.ArrayIndexOutOfBoundsException
at com.sun.media.sound.SimpleOutputDevice.getLine(SimpleOutputDevice.java:321)
at test_sampled_Mixer.getLineTests.run(getLineTests.java:58)
at test_sampled_Mixer.getLineTests.main(getLineTests.java:9)

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