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diff --git a/indra/media_plugins/cef/volume_catcher.h b/indra/media_plugins/cef/volume_catcher.h
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+++ b/indra/media_plugins/cef/volume_catcher.h
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+/** 
+ * @file volume_catcher.h
+ * @brief Interface to a class with platform-specific implementations that allows control of the audio volume of all sources in the current process.
+ *
+ * @cond
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * 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;
+ * version 2.1 of the License only.
+ * 
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ * @endcond
+ */
+
+#ifndef VOLUME_CATCHER_H
+#define VOLUME_CATCHER_H
+
+#include "linden_common.h"
+
+class VolumeCatcherImpl;
+
+class VolumeCatcher
+{
+ public:
+	VolumeCatcher();
+	~VolumeCatcher();
+
+	void setVolume(F32 volume); // 0.0 - 1.0
+	
+	// Set the left-right pan of audio sources
+	// where -1.0 = left, 0 = center, and 1.0 = right
+	void setPan(F32 pan); 
+
+	void pump(); // call this at least a few times a second if you can - it affects how quickly we can 'catch' a new audio source and adjust its volume
+	
+ private:
+	VolumeCatcherImpl *pimpl;
+};
+
+#endif // VOLUME_CATCHER_H