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diff --git a/WebCore/platform/audio/AudioResampler.h b/WebCore/platform/audio/AudioResampler.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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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 AudioResampler_h
+#define AudioResampler_h
+
+#include "AudioBus.h"
+#include "AudioResamplerKernel.h"
+#include "AudioSourceProvider.h"
+#include <wtf/OwnPtr.h>
+#include <wtf/Vector.h>
+
+namespace WebCore {
+
+// AudioResampler resamples the audio stream from an AudioSourceProvider.
+// The audio stream may be single or multi-channel.
+// The default constructor defaults to single-channel (mono).
+
+class AudioResampler {
+public:
+    AudioResampler();
+    AudioResampler(unsigned numberOfChannels);
+    ~AudioResampler() { }
+    
+    // Given an AudioSourceProvider, process() resamples the source stream into destinationBus.
+    void process(AudioSourceProvider*, AudioBus* destinationBus, size_t framesToProcess);
+
+    // Resets the processing state.
+    void reset();
+
+    void configureChannels(unsigned numberOfChannels);
+
+    // 0 < rate <= MaxRate
+    void setRate(double rate);
+    double rate() const { return m_rate; }
+
+    static const double MaxRate;
+
+private:
+    double m_rate;
+    Vector<OwnPtr<AudioResamplerKernel> > m_kernels;
+    OwnPtr<AudioBus> m_sourceBus;
+};
+
+} // namespace WebCore
+
+#endif // AudioResampler_h