michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim:set ts=2 sw=2 sts=2 et cindent: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef AudioDestinationNode_h_
michael@0: #define AudioDestinationNode_h_
michael@0: 
michael@0: #include "mozilla/dom/AudioChannelBinding.h"
michael@0: #include "AudioNode.h"
michael@0: #include "nsIDOMEventListener.h"
michael@0: #include "nsIAudioChannelAgent.h"
michael@0: #include "AudioChannelCommon.h"
michael@0: #include "nsWeakReference.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace dom {
michael@0: 
michael@0: class AudioContext;
michael@0: 
michael@0: class AudioDestinationNode : public AudioNode
michael@0:                            , public nsIDOMEventListener
michael@0:                            , public nsIAudioChannelAgentCallback
michael@0:                            , public nsSupportsWeakReference
michael@0:                            , public MainThreadMediaStreamListener
michael@0: {
michael@0: public:
michael@0:   // This node type knows what MediaStreamGraph to use based on
michael@0:   // whether it's in offline mode.
michael@0:   AudioDestinationNode(AudioContext* aContext,
michael@0:                        bool aIsOffline,
michael@0:                        AudioChannel aChannel = AudioChannel::Normal,
michael@0:                        uint32_t aNumberOfChannels = 0,
michael@0:                        uint32_t aLength = 0,
michael@0:                        float aSampleRate = 0.0f);
michael@0: 
michael@0:   virtual void DestroyMediaStream() MOZ_OVERRIDE;
michael@0: 
michael@0:   NS_DECL_ISUPPORTS_INHERITED
michael@0:   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioDestinationNode, AudioNode)
michael@0:   NS_DECL_NSIAUDIOCHANNELAGENTCALLBACK
michael@0: 
michael@0:   virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual uint16_t NumberOfOutputs() const MOZ_FINAL MOZ_OVERRIDE
michael@0:   {
michael@0:     return 0;
michael@0:   }
michael@0: 
michael@0:   uint32_t MaxChannelCount() const;
michael@0:   virtual void SetChannelCount(uint32_t aChannelCount,
michael@0:                                ErrorResult& aRv) MOZ_OVERRIDE;
michael@0: 
michael@0:   void Mute();
michael@0:   void Unmute();
michael@0: 
michael@0:   void StartRendering();
michael@0: 
michael@0:   void OfflineShutdown();
michael@0: 
michael@0:   // nsIDOMEventListener
michael@0:   NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent);
michael@0: 
michael@0:   AudioChannel MozAudioChannelType() const;
michael@0:   void SetMozAudioChannelType(AudioChannel aValue, ErrorResult& aRv);
michael@0: 
michael@0:   virtual void NotifyMainThreadStateChanged() MOZ_OVERRIDE;
michael@0:   void FireOfflineCompletionEvent();
michael@0: 
michael@0:   // An amount that should be added to the MediaStream's current time to
michael@0:   // get the AudioContext.currentTime.
michael@0:   double ExtraCurrentTime();
michael@0: 
michael@0:   // When aIsOnlyNode is true, this is the only node for the AudioContext.
michael@0:   void SetIsOnlyNodeForContext(bool aIsOnlyNode);
michael@0: 
michael@0:   virtual const char* NodeType() const
michael@0:   {
michael@0:     return "AudioDestinationNode";
michael@0:   }
michael@0: 
michael@0:   virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE;
michael@0:   virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE;
michael@0: 
michael@0: private:
michael@0:   bool CheckAudioChannelPermissions(AudioChannel aValue);
michael@0:   void CreateAudioChannelAgent();
michael@0: 
michael@0:   void SetCanPlay(bool aCanPlay);
michael@0: 
michael@0:   void NotifyStableState();
michael@0:   void ScheduleStableStateNotification();
michael@0: 
michael@0:   SelfReference<AudioDestinationNode> mOfflineRenderingRef;
michael@0:   uint32_t mFramesToProduce;
michael@0: 
michael@0:   nsCOMPtr<nsIAudioChannelAgent> mAudioChannelAgent;
michael@0: 
michael@0:   // Audio Channel Type.
michael@0:   AudioChannel mAudioChannel;
michael@0:   bool mIsOffline;
michael@0:   bool mHasFinished;
michael@0: 
michael@0:   TimeStamp mStartedBlockingDueToBeingOnlyNode;
michael@0:   double mExtraCurrentTime;
michael@0:   double mExtraCurrentTimeSinceLastStartedBlocking;
michael@0:   bool mExtraCurrentTimeUpdatedSinceLastStableState;
michael@0: };
michael@0: 
michael@0: }
michael@0: }
michael@0: 
michael@0: #endif
michael@0: