Cope with failing to initialize the sound system.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3683 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/openal/BlankSound.java

@@ -0,0 +1,38 @@
+//
+// $Id$
+//
+// Narya library - tools for developing networked games
+// Copyright (C) 2002-2005 Three Rings Design, Inc., All Rights Reserved
+// http://www.threerings.net/code/narya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library 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
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.openal;
+
+/**
+ * A blank sound used when we cannot initialize the sound system.
+ */
+public class BlankSound extends Sound
+{
+    protected BlankSound ()
+    {
+        super(null, null);
+    }
+
+    protected boolean play (boolean allowDefer, boolean loop)
+    {
+        return false; // nothing doing
+    }
+}

src/java/com/threerings/openal/SoundGroup.java

@@ -48,7 +48,11 @@ public class SoundGroup
      */
     public Sound getSound (String path)
     {
-        return new Sound(this, _manager.getClip(_provider, path));
+        if (_manager.isInitialized()) {
+            return new Sound(this, _manager.getClip(_provider, path));
+        } else {
+            return new BlankSound();
+        }
     }
 
     /**
@@ -67,6 +71,12 @@ public class SoundGroup
         _manager = manager;
         _provider = provider;
 
+        // if we were unable to initialize the sound system at all, just
+        // stop here and we'll behave as if we have no available sources
+        if (!_manager.isInitialized()) {
+            return;
+        }
+
         // create our sources
         _sourceIds = BufferUtils.createIntBuffer(sources);
         AL10.alGenSources(_sourceIds);

src/java/com/threerings/openal/SoundManager.java

@@ -69,6 +69,14 @@ public class SoundManager
         return _soundmgr;
     }
 
+    /**
+     * Returns true if we were able to initialize the sound system.
+     */
+    public boolean isInitialized ()
+    {
+        return (_toLoad != null);
+    }
+
     /**
      * Configures the size of our sound cache. If this value is larger
      * than memory available to the underlying sound system, it will be