OpenJDK needs to add gain control support

[أحمد المحمودي (Ahmed El-Mahmoudy)]

Hello,

  A java application using libbasicplayer-java for audio playback. Yet when using OpenJDK (with pulseaudio as the sound service provider), I get the following error when I attempt to fiddle with the volume from the java application:

   java.lang.IllegalArgumentException: Master Gain not supported
    org.classpath.icedtea.pulseaudio.PulseAudioLine.getControl(PulseAudioLine.java:89)
    org.classpath.icedtea.pulseaudio.PulseAudioSourceDataLine.getControl(PulseAudioSourceDataLine.java:51)
    javazoom.jlgui.basicplayer.BasicPlayer.openLine(Unknown Source)
    javazoom.jlgui.basicplayer.BasicPlayer.initLine(Unknown Source)
    javazoom.jlgui.basicplayer.BasicPlayer.startPlayback(Unknown Source)
    javazoom.jlgui.basicplayer.BasicPlayer.play(Unknown Source)

This does not happen when I edit /etc/java-6-openjdk/sound.properties to use the other sound service provider (com.sun.media.sound.<whatever>).

[Matthias Klose (doko)]

see bug #491784

[أحمد المحمودي (Ahmed El-Mahmoudy) (aelmahmoudy)]

Matthias: the patch I made for libbasicplayer-java was just adding a
try..catch in order to avoid crashes in java programs that used
libbasicplayer-java. But it does not fix any problem !

--
 ‎أحمد المحمودي (Ahmed El-Mahmoudy)
  Digital design engineer
 GPG KeyID: 0xEDDDA1B7
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[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[broussaille (seb-abilla)]

Bug appears when i try to attempt audio lectures using cgoban3 with xubuntu 12.4.
However, the solution you gave works fine. Thank you!