The Tor Browser: content/media/webaudio/AudioDestinationNode.h@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* vim:set ts=2 sw=2 sts=2 et cindent: */

     3 /* This Source Code Form is subject to the terms of the Mozilla Public

     4  * License, v. 2.0. If a copy of the MPL was not distributed with this

     5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     7 #ifndef AudioDestinationNode_h_

     8 #define AudioDestinationNode_h_

    10 #include "mozilla/dom/AudioChannelBinding.h"

    11 #include "AudioNode.h"

    12 #include "nsIDOMEventListener.h"

    13 #include "nsIAudioChannelAgent.h"

    14 #include "AudioChannelCommon.h"

    15 #include "nsWeakReference.h"

    17 namespace mozilla {

    18 namespace dom {

    20 class AudioContext;

    22 class AudioDestinationNode : public AudioNode

    23                            , public nsIDOMEventListener

    24                            , public nsIAudioChannelAgentCallback

    25                            , public nsSupportsWeakReference

    26                            , public MainThreadMediaStreamListener

    27 {

    28 public:

    29   // This node type knows what MediaStreamGraph to use based on

    30   // whether it's in offline mode.

    31   AudioDestinationNode(AudioContext* aContext,

    32                        bool aIsOffline,

    33                        AudioChannel aChannel = AudioChannel::Normal,

    34                        uint32_t aNumberOfChannels = 0,

    35                        uint32_t aLength = 0,

    36                        float aSampleRate = 0.0f);

    38   virtual void DestroyMediaStream() MOZ_OVERRIDE;

    40   NS_DECL_ISUPPORTS_INHERITED

    41   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioDestinationNode, AudioNode)

    42   NS_DECL_NSIAUDIOCHANNELAGENTCALLBACK

    44   virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;

    46   virtual uint16_t NumberOfOutputs() const MOZ_FINAL MOZ_OVERRIDE

    47   {

    48     return 0;

    49   }

    51   uint32_t MaxChannelCount() const;

    52   virtual void SetChannelCount(uint32_t aChannelCount,

    53                                ErrorResult& aRv) MOZ_OVERRIDE;

    55   void Mute();

    56   void Unmute();

    58   void StartRendering();

    60   void OfflineShutdown();

    62   // nsIDOMEventListener

    63   NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent);

    65   AudioChannel MozAudioChannelType() const;

    66   void SetMozAudioChannelType(AudioChannel aValue, ErrorResult& aRv);

    68   virtual void NotifyMainThreadStateChanged() MOZ_OVERRIDE;

    69   void FireOfflineCompletionEvent();

    71   // An amount that should be added to the MediaStream's current time to

    72   // get the AudioContext.currentTime.

    73   double ExtraCurrentTime();

    75   // When aIsOnlyNode is true, this is the only node for the AudioContext.

    76   void SetIsOnlyNodeForContext(bool aIsOnlyNode);

    78   virtual const char* NodeType() const

    79   {

    80     return "AudioDestinationNode";

    81   }

    83   virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE;

    84   virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE;

    86 private:

    87   bool CheckAudioChannelPermissions(AudioChannel aValue);

    88   void CreateAudioChannelAgent();

    90   void SetCanPlay(bool aCanPlay);

    92   void NotifyStableState();

    93   void ScheduleStableStateNotification();

    95   SelfReference<AudioDestinationNode> mOfflineRenderingRef;

    96   uint32_t mFramesToProduce;

    98   nsCOMPtr<nsIAudioChannelAgent> mAudioChannelAgent;

   100   // Audio Channel Type.

   101   AudioChannel mAudioChannel;

   102   bool mIsOffline;

   103   bool mHasFinished;

   105   TimeStamp mStartedBlockingDueToBeingOnlyNode;

   106   double mExtraCurrentTime;

   107   double mExtraCurrentTimeSinceLastStartedBlocking;

   108   bool mExtraCurrentTimeUpdatedSinceLastStableState;

   109 };

   111 }

   112 }

   114 #endif

The Tor Browser / file revision

content/media/webaudio/AudioDestinationNode.h@97036ab72558

content/media/webaudio/AudioDestinationNode.h