[Bug 438] PulseAudioSourceDataLine falsely returns true to isControlSupported(Gain)

[bugzilla-daemon at icedtea.classpath.org]

http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=438





------- Comment #2 from masory at sas.upenn.edu  2010-04-28 17:22 -------
(In reply to comment #1)
> Hi,
> 
> Looking at the source, I think I know why.  Would you happen to have an example
> that reproduces this, to save me the time of throwing one together?
> 

Here is an example of audio playback:
http://www.jsresources.org/examples/SimpleAudioPlayer.java.html
To see the gain behavior add this code after line.start():

                        if
(outputLine.isControlSupported(FloatControl.Type.MASTER_GAIN)) {
                                try {
                                        gainControl = (FloatControl)
outputLine.getControl(FloatControl.Type.MASTER_GAIN);
                                }
                                catch(Exception e) {
                                        //OpenJDK throws exception stating
master gain control not available, despite returning true to isControlSupported
                                        e.printStackTrace();
                                }
                        }


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