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0ab5221feb
See bug 980506 for an extensive discussion about this. This patch adds three APIs to AudioNode in order for us to be able to build awesome devtools on top of it. * Weak reference API. This patch allows one to hold a weak reference to all AudioNode's using Components.utils.getWeakReference(). That way, the devtool's inspection code would not change the lifetime of AudioNodes. * AudioNode.id This is a chrome-only unique and monotonically incrementing ID for AudioNode objects. It is supposed to be used in order for the devtools to be able to identify a node without having to keep it alive. * webaudio-node-demise This is an observer notification that is called every time an AudioNode gets destroyed inside Gecko. The ID of the corresponding node is passed to this notification. --HG-- extra : rebase_source : 83246a990489daf44ddc97dd4ea372a8cebe8e00
114 lines
3.2 KiB
C++
114 lines
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef AudioDestinationNode_h_
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#define AudioDestinationNode_h_
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#include "mozilla/dom/AudioChannelBinding.h"
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#include "AudioNode.h"
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#include "nsIDOMEventListener.h"
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#include "nsIAudioChannelAgent.h"
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#include "AudioChannelCommon.h"
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namespace mozilla {
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namespace dom {
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class AudioContext;
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class AudioDestinationNode : public AudioNode
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, public nsIDOMEventListener
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, public nsIAudioChannelAgentCallback
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, public MainThreadMediaStreamListener
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{
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public:
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// This node type knows what MediaStreamGraph to use based on
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// whether it's in offline mode.
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AudioDestinationNode(AudioContext* aContext,
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bool aIsOffline,
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AudioChannel aChannel = AudioChannel::Normal,
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uint32_t aNumberOfChannels = 0,
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uint32_t aLength = 0,
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float aSampleRate = 0.0f);
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virtual void DestroyMediaStream() MOZ_OVERRIDE;
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioDestinationNode, AudioNode)
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NS_DECL_NSIAUDIOCHANNELAGENTCALLBACK
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virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
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virtual uint16_t NumberOfOutputs() const MOZ_FINAL MOZ_OVERRIDE
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{
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return 0;
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}
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uint32_t MaxChannelCount() const;
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virtual void SetChannelCount(uint32_t aChannelCount,
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ErrorResult& aRv) MOZ_OVERRIDE;
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void Mute();
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void Unmute();
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void StartRendering();
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void OfflineShutdown();
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// nsIDOMEventListener
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NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent);
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AudioChannel MozAudioChannelType() const;
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void SetMozAudioChannelType(AudioChannel aValue, ErrorResult& aRv);
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virtual void NotifyMainThreadStateChanged() MOZ_OVERRIDE;
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void FireOfflineCompletionEvent();
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// An amount that should be added to the MediaStream's current time to
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// get the AudioContext.currentTime.
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double ExtraCurrentTime();
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// When aIsOnlyNode is true, this is the only node for the AudioContext.
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void SetIsOnlyNodeForContext(bool aIsOnlyNode);
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virtual const char* NodeType() const
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{
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return "AudioDestinationNode";
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}
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virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE;
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virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE;
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private:
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bool CheckAudioChannelPermissions(AudioChannel aValue);
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void CreateAudioChannelAgent();
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void SetCanPlay(bool aCanPlay);
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void NotifyStableState();
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void ScheduleStableStateNotification();
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SelfReference<AudioDestinationNode> mOfflineRenderingRef;
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uint32_t mFramesToProduce;
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nsCOMPtr<nsIAudioChannelAgent> mAudioChannelAgent;
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// Audio Channel Type.
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AudioChannel mAudioChannel;
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bool mIsOffline;
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bool mHasFinished;
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TimeStamp mStartedBlockingDueToBeingOnlyNode;
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double mExtraCurrentTime;
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double mExtraCurrentTimeSinceLastStartedBlocking;
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bool mExtraCurrentTimeUpdatedSinceLastStableState;
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};
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}
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}
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#endif
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