diff -r 000000000000 -r 6474c204b198 content/media/webaudio/AudioContext.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/media/webaudio/AudioContext.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,280 @@
+/* -*- 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 AudioContext_h_
+#define AudioContext_h_
+
+#include "mozilla/dom/AudioChannelBinding.h"
+#include "MediaBufferDecoder.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/DOMEventTargetHelper.h"
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/dom/TypedArray.h"
+#include "nsAutoPtr.h"
+#include "nsCOMPtr.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsHashKeys.h"
+#include "nsTHashtable.h"
+#include "js/TypeDecls.h"
+#include "nsIMemoryReporter.h"
+
+// X11 has a #define for CurrentTime. Unbelievable :-(.
+// See content/media/DOMMediaStream.h for more fun!
+#ifdef CurrentTime
+#undef CurrentTime
+#endif
+
+class nsPIDOMWindow;
+
+namespace mozilla {
+
+class DOMMediaStream;
+class ErrorResult;
+class MediaStream;
+class MediaStreamGraph;
+
+namespace dom {
+
+class AnalyserNode;
+class AudioBuffer;
+class AudioBufferSourceNode;
+class AudioDestinationNode;
+class AudioListener;
+class AudioNode;
+class BiquadFilterNode;
+class ChannelMergerNode;
+class ChannelSplitterNode;
+class ConvolverNode;
+class DelayNode;
+class DynamicsCompressorNode;
+class GainNode;
+class HTMLMediaElement;
+class MediaElementAudioSourceNode;
+class GlobalObject;
+class MediaStreamAudioDestinationNode;
+class MediaStreamAudioSourceNode;
+class OscillatorNode;
+class PannerNode;
+class ScriptProcessorNode;
+class WaveShaperNode;
+class PeriodicWave;
+
+class AudioContext MOZ_FINAL : public DOMEventTargetHelper,
+                               public nsIMemoryReporter
+{
+  AudioContext(nsPIDOMWindow* aParentWindow,
+               bool aIsOffline,
+               AudioChannel aChannel = AudioChannel::Normal,
+               uint32_t aNumberOfChannels = 0,
+               uint32_t aLength = 0,
+               float aSampleRate = 0.0f);
+  ~AudioContext();
+
+public:
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioContext,
+                                           DOMEventTargetHelper)
+  MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf)
+
+  nsPIDOMWindow* GetParentObject() const
+  {
+    return GetOwner();
+  }
+
+  void Shutdown(); // idempotent
+  void Suspend();
+  void Resume();
+
+  virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
+
+  using DOMEventTargetHelper::DispatchTrustedEvent;
+
+  // Constructor for regular AudioContext
+  static already_AddRefed<AudioContext>
+  Constructor(const GlobalObject& aGlobal, ErrorResult& aRv);
+
+  // Constructor for regular AudioContext. A default audio channel is needed.
+  static already_AddRefed<AudioContext>
+  Constructor(const GlobalObject& aGlobal,
+              AudioChannel aChannel,
+              ErrorResult& aRv);
+
+  // Constructor for offline AudioContext
+  static already_AddRefed<AudioContext>
+  Constructor(const GlobalObject& aGlobal,
+              uint32_t aNumberOfChannels,
+              uint32_t aLength,
+              float aSampleRate,
+              ErrorResult& aRv);
+
+  // AudioContext methods
+
+  AudioDestinationNode* Destination() const
+  {
+    return mDestination;
+  }
+
+  float SampleRate() const
+  {
+    return mSampleRate;
+  }
+
+  double CurrentTime() const;
+
+  AudioListener* Listener();
+
+  already_AddRefed<AudioBufferSourceNode> CreateBufferSource();
+
+  already_AddRefed<AudioBuffer>
+  CreateBuffer(JSContext* aJSContext, uint32_t aNumberOfChannels,
+               uint32_t aLength, float aSampleRate,
+               ErrorResult& aRv);
+
+  already_AddRefed<MediaStreamAudioDestinationNode>
+  CreateMediaStreamDestination(ErrorResult& aRv);
+
+  already_AddRefed<ScriptProcessorNode>
+  CreateScriptProcessor(uint32_t aBufferSize,
+                        uint32_t aNumberOfInputChannels,
+                        uint32_t aNumberOfOutputChannels,
+                        ErrorResult& aRv);
+
+  already_AddRefed<AnalyserNode>
+  CreateAnalyser();
+
+  already_AddRefed<GainNode>
+  CreateGain();
+
+  already_AddRefed<WaveShaperNode>
+  CreateWaveShaper();
+
+  already_AddRefed<MediaElementAudioSourceNode>
+  CreateMediaElementSource(HTMLMediaElement& aMediaElement, ErrorResult& aRv);
+  already_AddRefed<MediaStreamAudioSourceNode>
+  CreateMediaStreamSource(DOMMediaStream& aMediaStream, ErrorResult& aRv);
+
+  already_AddRefed<DelayNode>
+  CreateDelay(double aMaxDelayTime, ErrorResult& aRv);
+
+  already_AddRefed<PannerNode>
+  CreatePanner();
+
+  already_AddRefed<ConvolverNode>
+  CreateConvolver();
+
+  already_AddRefed<ChannelSplitterNode>
+  CreateChannelSplitter(uint32_t aNumberOfOutputs, ErrorResult& aRv);
+
+  already_AddRefed<ChannelMergerNode>
+  CreateChannelMerger(uint32_t aNumberOfInputs, ErrorResult& aRv);
+
+  already_AddRefed<DynamicsCompressorNode>
+  CreateDynamicsCompressor();
+
+  already_AddRefed<BiquadFilterNode>
+  CreateBiquadFilter();
+
+  already_AddRefed<OscillatorNode>
+  CreateOscillator();
+
+  already_AddRefed<PeriodicWave>
+  CreatePeriodicWave(const Float32Array& aRealData, const Float32Array& aImagData,
+                     ErrorResult& aRv);
+
+  void DecodeAudioData(const ArrayBuffer& aBuffer,
+                       DecodeSuccessCallback& aSuccessCallback,
+                       const Optional<OwningNonNull<DecodeErrorCallback> >& aFailureCallback);
+
+  // OfflineAudioContext methods
+  void StartRendering(ErrorResult& aRv);
+  IMPL_EVENT_HANDLER(complete)
+
+  bool IsOffline() const { return mIsOffline; }
+
+  MediaStreamGraph* Graph() const;
+  MediaStream* DestinationStream() const;
+
+  // Nodes register here if they will produce sound even if they have silent
+  // or no input connections.  The AudioContext will keep registered nodes
+  // alive until the context is collected.  This takes care of "playing"
+  // references and "tail-time" references.
+  void RegisterActiveNode(AudioNode* aNode);
+  // Nodes unregister when they have finished producing sound for the
+  // foreseeable future.
+  // Do NOT call UnregisterActiveNode from an AudioNode destructor.
+  // If the destructor is called, then the Node has already been unregistered.
+  // The destructor may be called during hashtable enumeration, during which
+  // unregistering would not be safe.
+  void UnregisterActiveNode(AudioNode* aNode);
+
+  void UnregisterAudioBufferSourceNode(AudioBufferSourceNode* aNode);
+  void UnregisterPannerNode(PannerNode* aNode);
+  void UpdatePannerSource();
+
+  uint32_t MaxChannelCount() const;
+
+  void Mute() const;
+  void Unmute() const;
+
+  JSContext* GetJSContext() const;
+
+  AudioChannel MozAudioChannelType() const;
+  void SetMozAudioChannelType(AudioChannel aValue, ErrorResult& aRv);
+
+  void UpdateNodeCount(int32_t aDelta);
+
+  double DOMTimeToStreamTime(double aTime) const
+  {
+    return aTime - ExtraCurrentTime();
+  }
+
+private:
+  /**
+   * Returns the amount of extra time added to the current time of the
+   * AudioDestinationNode's MediaStream to get this AudioContext's currentTime.
+   * Must be subtracted from all DOM API parameter times that are on the same
+   * timeline as AudioContext's currentTime to get times we can pass to the
+   * MediaStreamGraph.
+   */
+  double ExtraCurrentTime() const;
+
+  void RemoveFromDecodeQueue(WebAudioDecodeJob* aDecodeJob);
+  void ShutdownDecoder();
+
+  size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
+  NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
+                            nsISupports* aData);
+
+  friend struct ::mozilla::WebAudioDecodeJob;
+
+private:
+  // Note that it's important for mSampleRate to be initialized before
+  // mDestination, as mDestination's constructor needs to access it!
+  const float mSampleRate;
+  nsRefPtr<AudioDestinationNode> mDestination;
+  nsRefPtr<AudioListener> mListener;
+  MediaBufferDecoder mDecoder;
+  nsTArray<nsRefPtr<WebAudioDecodeJob> > mDecodeJobs;
+  // See RegisterActiveNode.  These will keep the AudioContext alive while it
+  // is rendering and the window remains alive.
+  nsTHashtable<nsRefPtrHashKey<AudioNode> > mActiveNodes;
+  // Hashsets containing all the PannerNodes, to compute the doppler shift.
+  // These are weak pointers.
+  nsTHashtable<nsPtrHashKey<PannerNode> > mPannerNodes;
+  // Number of channels passed in the OfflineAudioContext ctor.
+  uint32_t mNumberOfChannels;
+  // Number of nodes that currently exist for this AudioContext
+  int32_t mNodeCount;
+  bool mIsOffline;
+  bool mIsStarted;
+  bool mIsShutDown;
+};
+
+}
+}
+
+#endif
+