86 lines
2.5 KiB
Java
86 lines
2.5 KiB
Java
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/*
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* 11/19/04 1.0 moved to LGPL.
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* 29/01/00 Initial version. mdm@techie.com
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*-----------------------------------------------------------------------
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*----------------------------------------------------------------------
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*/
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package javazoom.jl.player;
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import javazoom.jl.decoder.JavaLayerException;
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/**
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* This class is responsible for creating instances of the
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* JavaSoundAudioDevice. The audio device implementation is loaded
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* and tested dynamically as not all systems will have support
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* for JavaSound, or they may have the incorrect version.
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*/
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public class JavaSoundAudioDeviceFactory extends AudioDeviceFactory
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{
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private boolean tested = false;
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static private final String DEVICE_CLASS_NAME = "javazoom.jl.player.JavaSoundAudioDevice";
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public synchronized AudioDevice createAudioDevice()
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throws JavaLayerException
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{
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if (!tested)
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{
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testAudioDevice();
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tested = true;
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}
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try
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{
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return createAudioDeviceImpl();
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}
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catch (Exception ex)
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{
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throw new JavaLayerException("unable to create JavaSound device: "+ex);
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}
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catch (LinkageError ex)
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{
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throw new JavaLayerException("unable to create JavaSound device: "+ex);
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}
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}
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protected JavaSoundAudioDevice createAudioDeviceImpl()
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throws JavaLayerException
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{
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ClassLoader loader = getClass().getClassLoader();
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try
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{
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JavaSoundAudioDevice dev = (JavaSoundAudioDevice)instantiate(loader, DEVICE_CLASS_NAME);
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return dev;
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}
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catch (Exception ex)
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{
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throw new JavaLayerException("Cannot create JavaSound device", ex);
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}
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catch (LinkageError ex)
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{
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throw new JavaLayerException("Cannot create JavaSound device", ex);
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}
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}
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public void testAudioDevice() throws JavaLayerException
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{
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JavaSoundAudioDevice dev = createAudioDeviceImpl();
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dev.test();
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}
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}
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