/*
* 29/01/00 Initial version. mdm@techie.com
*-----------------------------------------------------------------------
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*----------------------------------------------------------------------
*/
package net.javazoom.jl.player;
import net.javazoom.jl.decoder.JavaLayerException;
/**
* This class is responsible for creating instances of the
* JavaSoundAudioDevice. The audio device implementation is loaded
* and tested dynamically as not all systems will have support
* for JavaSound, or they may have the incorrect version.
*/
public class JavaSoundAudioDeviceFactory extends AudioDeviceFactory
{
private boolean tested = false;
static private final String DEVICE_CLASS_NAME = "javazoom.jl.player.JavaSoundAudioDevice";
public synchronized AudioDevice createAudioDevice()
throws JavaLayerException
{
if (!tested)
{
testAudioDevice();
tested = true;
}
try
{
return createAudioDeviceImpl();
}
catch (Exception ex)
{
throw new JavaLayerException("unable to create JavaSound device: "+ex);
}
catch (LinkageError ex)
{
throw new JavaLayerException("unable to create JavaSound device: "+ex);
}
}
protected JavaSoundAudioDevice createAudioDeviceImpl()
throws JavaLayerException
{
ClassLoader loader = getClass().getClassLoader();
try
{
JavaSoundAudioDevice dev = (JavaSoundAudioDevice)instantiate(loader, DEVICE_CLASS_NAME);
return dev;
}
catch (Exception ex)
{
throw new JavaLayerException("Cannot create JavaSound device", ex);
}
catch (LinkageError ex)
{
throw new JavaLayerException("Cannot create JavaSound device", ex);
}
}
public void testAudioDevice() throws JavaLayerException
{
JavaSoundAudioDevice dev = createAudioDeviceImpl();
dev.test();
}
}