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diff --git a/WebCore/platform/audio/Cone.h b/WebCore/platform/audio/Cone.h
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+/*
+ * Copyright (C) 2010 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef Cone_h
+#define Cone_h
+
+#include <wtf/Vector3.h>
+
+namespace WebCore {
+
+// Cone gain is defined according to the OpenAL specification
+
+class ConeEffect {
+public:
+    ConeEffect();
+
+    // Returns scalar gain for the given source/listener positions/orientations
+    double gain(Vector3 sourcePosition, Vector3 sourceOrientation, Vector3 listenerPosition);
+
+    // Angles in degrees
+    void setInnerAngle(double innerAngle) { m_innerAngle = innerAngle; }
+    double innerAngle() const { return m_innerAngle; }
+
+    void setOuterAngle(double outerAngle) { m_outerAngle = outerAngle; }
+    double outerAngle() const { return m_outerAngle; }
+
+    void setOuterGain(double outerGain) { m_outerGain = outerGain; }
+    double outerGain() const { return m_outerGain; }
+
+protected:
+    double m_innerAngle;
+    double m_outerAngle;
+    double m_outerGain;
+};
+
+} // namespace WebCore
+
+#endif // Cone_h