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Viewing changes to src/javazoom/jl/player/JavaSoundAudioDeviceFactory.java

  • Committer: Chris Lamb
  • Date: 2007-01-13 22:14:47 UTC
  • mfrom: (1.2.4 gryle)
  • mto: (1.2.6 gryle)
  • mto: This revision was merged to the branch mainline in revision 9.
  • Revision ID: csueaj@viglab-29-20070113221447-9rl7yytjuzuibi1g
 

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src/javazoom/jl/player/JavaSoundAudioDeviceFactory.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 JavaSoundAudioDevice.
 
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 * The audio device implementation is loaded and tested dynamically as not all
 
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 * systems will have support for JavaSound, or they may have the incorrect
 
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 * version.
 
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 */
 
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public class JavaSoundAudioDeviceFactory extends AudioDeviceFactory {
 
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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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                if (!tested) {
 
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                        testAudioDevice();
 
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                        tested = true;
 
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                }
 
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                try {
 
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                        return createAudioDeviceImpl();
 
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                } catch (Exception ex) {
 
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                        throw new JavaLayerException("unable to create JavaSound device: "
 
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                                        + ex);
 
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                } catch (LinkageError ex) {
 
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                        throw new JavaLayerException("unable to create JavaSound device: "
 
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                                        + 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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                ClassLoader loader = getClass().getClassLoader();
 
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                try {
 
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                        JavaSoundAudioDevice dev = (JavaSoundAudioDevice) instantiate(
 
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                                        loader, DEVICE_CLASS_NAME);
 
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                        return dev;
 
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                } catch (Exception ex) {
 
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                        throw new JavaLayerException("Cannot create JavaSound device", ex);
 
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                } catch (LinkageError ex) {
 
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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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                JavaSoundAudioDevice dev = createAudioDeviceImpl();
 
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                dev.test();
 
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        }
 
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}