diff -r 000000000000 -r 6474c204b198 content/media/webaudio/AudioProcessingEvent.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/media/webaudio/AudioProcessingEvent.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,82 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef AudioProcessingEvent_h_
+#define AudioProcessingEvent_h_
+
+#include "AudioBuffer.h"
+#include "ScriptProcessorNode.h"
+#include "mozilla/dom/Event.h"
+
+namespace mozilla {
+namespace dom {
+
+class AudioProcessingEvent : public Event
+{
+public:
+  AudioProcessingEvent(ScriptProcessorNode* aOwner,
+                       nsPresContext* aPresContext,
+                       WidgetEvent* aEvent);
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_FORWARD_TO_EVENT
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioProcessingEvent, Event)
+
+  virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
+
+  void InitEvent(AudioBuffer* aInputBuffer,
+                 uint32_t aNumberOfInputChannels,
+                 double aPlaybackTime)
+  {
+    InitEvent(NS_LITERAL_STRING("audioprocess"), false, false);
+    mInputBuffer = aInputBuffer;
+    mNumberOfInputChannels = aNumberOfInputChannels;
+    mPlaybackTime = aPlaybackTime;
+  }
+
+  double PlaybackTime() const
+  {
+    return mPlaybackTime;
+  }
+
+  AudioBuffer* GetInputBuffer(ErrorResult& aRv)
+  {
+    if (!mInputBuffer) {
+      mInputBuffer = LazilyCreateBuffer(mNumberOfInputChannels, aRv);
+    }
+    return mInputBuffer;
+  }
+
+  AudioBuffer* GetOutputBuffer(ErrorResult& aRv)
+  {
+    if (!mOutputBuffer) {
+      mOutputBuffer = LazilyCreateBuffer(mNode->NumberOfOutputChannels(), aRv);
+    }
+    return mOutputBuffer;
+  }
+
+  bool HasOutputBuffer() const
+  {
+    return !!mOutputBuffer;
+  }
+
+private:
+  already_AddRefed<AudioBuffer>
+  LazilyCreateBuffer(uint32_t aNumberOfChannels, ErrorResult& rv);
+
+private:
+  double mPlaybackTime;
+  nsRefPtr<AudioBuffer> mInputBuffer;
+  nsRefPtr<AudioBuffer> mOutputBuffer;
+  nsRefPtr<ScriptProcessorNode> mNode;
+  uint32_t mNumberOfInputChannels;
+};
+
+}
+}
+
+#endif
+