Adjusting Volume using JLayer

Question

Hey there,

me and a friend are programming a MP3 Player as a schoolproject. We are nearly finished and now stuck at the point where we try to programm a function to change the volume of the player. We are using:

• AudioDevice
• AdvancedPlayer

I know someone else asked the same question allready but I did not quite get the solution and I didn't want to respond to such an old question so I thought I'm just gonna ask again.

Cheers Timothy

Answer 1

Hi, JLGUI is a good example of a UI-based JLayer app adjusting volume. You can get the source code in the tar.gz file. http://www.javazoom.net/jlgui/sources.html

    if (src == ui.getAcVolume())
    {
        Object[] args = { String.valueOf(ui.getAcVolume().getValue()) };
        String volumeText = MessageFormat.format(ui.getResource("slider.volume.text"), args);
        ui.getAcTitleLabel().setAcText(volumeText);
        try
        {
            int gainValue = ui.getAcVolume().getValue();
            int maxGain = ui.getAcVolume().getMaximum();
            if (gainValue == 0) theSoundPlayer.setGain(0);
            else theSoundPlayer.setGain(((double) gainValue / (double) maxGain));
            config.setVolume(gainValue);
        }
        catch (BasicPlayerException ex)
        {
            log.debug("Cannot set gain", ex);
        }
    }