diff -r 000000000000 -r 6474c204b198 content/media/webaudio/MediaBufferDecoder.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/media/webaudio/MediaBufferDecoder.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,98 @@
+/* -*- 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 MediaBufferDecoder_h_
+#define MediaBufferDecoder_h_
+
+#include "nsWrapperCache.h"
+#include "nsCOMPtr.h"
+#include "nsAutoPtr.h"
+#include "nsIThreadPool.h"
+#include "nsString.h"
+#include "nsTArray.h"
+#include "mozilla/dom/TypedArray.h"
+#include "mozilla/MemoryReporting.h"
+
+namespace mozilla {
+
+namespace dom {
+class AudioBuffer;
+class AudioContext;
+class DecodeErrorCallback;
+class DecodeSuccessCallback;
+}
+
+struct WebAudioDecodeJob MOZ_FINAL
+{
+  // You may omit both the success and failure callback, or you must pass both.
+  // The callbacks are only necessary for asynchronous operation.
+  WebAudioDecodeJob(const nsACString& aContentType,
+                    dom::AudioContext* aContext,
+                    dom::DecodeSuccessCallback* aSuccessCallback = nullptr,
+                    dom::DecodeErrorCallback* aFailureCallback = nullptr);
+  ~WebAudioDecodeJob();
+
+  NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(WebAudioDecodeJob)
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(WebAudioDecodeJob)
+
+  enum ErrorCode {
+    NoError,
+    UnknownContent,
+    UnknownError,
+    InvalidContent,
+    NoAudio
+  };
+
+  typedef void (WebAudioDecodeJob::*ResultFn)(ErrorCode);
+  typedef nsAutoArrayPtr<float> ChannelBuffer;
+
+  void OnSuccess(ErrorCode /* ignored */);
+  void OnFailure(ErrorCode aErrorCode);
+
+  bool AllocateBuffer();
+
+  size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
+
+  nsCString mContentType;
+  uint32_t mWriteIndex;
+  nsRefPtr<dom::AudioContext> mContext;
+  nsRefPtr<dom::DecodeSuccessCallback> mSuccessCallback;
+  nsRefPtr<dom::DecodeErrorCallback> mFailureCallback; // can be null
+  nsRefPtr<dom::AudioBuffer> mOutput;
+  FallibleTArray<ChannelBuffer> mChannelBuffers;
+};
+
+/**
+ * This class is used to decode media buffers on a dedicated threadpool.
+ *
+ * This class manages the resources that it uses internally (such as the
+ * thread-pool) and provides a clean external interface.
+ */
+class MediaBufferDecoder
+{
+public:
+  void AsyncDecodeMedia(const char* aContentType, uint8_t* aBuffer,
+                        uint32_t aLength, WebAudioDecodeJob& aDecodeJob);
+
+  ~MediaBufferDecoder() { Shutdown(); }
+  void Shutdown();
+
+  size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
+  {
+    return 0;
+  }
+
+private:
+  bool EnsureThreadPoolInitialized();
+
+private:
+  nsCOMPtr<nsIThreadPool> mThreadPool;
+};
+
+}
+
+#endif
+