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diff --git a/Source/WebCore/webaudio/AudioBuffer.h b/Source/WebCore/webaudio/AudioBuffer.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 AudioBuffer_h
+#define AudioBuffer_h
+
+#include <wtf/Float32Array.h>
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefCounted.h>
+#include <wtf/RefPtr.h>
+#include <wtf/Vector.h>
+
+namespace WebCore {
+
+class AudioBus;
+    
+class AudioBuffer : public RefCounted<AudioBuffer> {
+public:   
+    static PassRefPtr<AudioBuffer> create(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate);
+
+    // Returns 0 if data is not a valid audio file.
+    static PassRefPtr<AudioBuffer> createFromAudioFileData(const void* data, size_t dataSize, bool mixToMono, float sampleRate);
+
+    // Format
+    size_t length() const { return m_length; }
+    double duration() const { return length() / sampleRate(); }
+    float sampleRate() const { return m_sampleRate; }
+
+    // Channel data access
+    unsigned numberOfChannels() const { return m_channels.size(); }
+    Float32Array* getChannelData(unsigned channelIndex);
+    void zero();
+
+    // Scalar gain
+    double gain() const { return m_gain; }
+    void setGain(double gain) { m_gain = gain; }
+
+    // Because an AudioBuffer has a JavaScript wrapper, which will be garbage collected, it may take awhile for this object to be deleted.
+    // releaseMemory() can be called when the AudioContext goes away, so we can release the memory earlier than when the garbage collection happens.
+    // Careful! Only call this when the page unloads, after the AudioContext is no longer processing.
+    void releaseMemory();
+    
+protected:
+    AudioBuffer(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate);
+    AudioBuffer(AudioBus* bus);
+
+    double m_gain; // scalar gain
+    float m_sampleRate;
+    size_t m_length;
+
+    Vector<RefPtr<Float32Array> > m_channels;
+};
+
+} // namespace WebCore
+
+#endif // AudioBuffer_h