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69 lines
1.8 KiB
C++
69 lines
1.8 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 DelayNode_h_
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#define DelayNode_h_
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#include "AudioNode.h"
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#include "AudioParam.h"
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namespace mozilla {
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namespace dom {
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class AudioContext;
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template <class T> class PlayingRefChangeHandler;
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class DelayNode : public AudioNode
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{
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public:
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DelayNode(AudioContext* aContext, double aMaxDelay);
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(DelayNode, AudioNode)
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virtual JSObject* WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aScope) MOZ_OVERRIDE;
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AudioParam* DelayTime() const
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{
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return mDelay;
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}
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virtual const DelayNode* AsDelayNode() const MOZ_OVERRIDE
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{
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return this;
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}
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virtual void NotifyInputConnected() MOZ_OVERRIDE
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{
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mMediaStreamGraphUpdateIndexAtLastInputConnection =
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mStream->Graph()->GetCurrentGraphUpdateIndex();
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}
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bool AcceptPlayingRefRelease(int64_t aLastGraphUpdateIndexProcessed) const
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{
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// Reject any requests to release mPlayingRef if the request was issued
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// before the MediaStreamGraph was aware of the most-recently-added input
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// connection.
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return aLastGraphUpdateIndexProcessed >= mMediaStreamGraphUpdateIndexAtLastInputConnection;
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}
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private:
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static void SendDelayToStream(AudioNode* aNode);
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friend class DelayNodeEngine;
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friend class PlayingRefChangeHandler<DelayNode>;
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private:
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int64_t mMediaStreamGraphUpdateIndexAtLastInputConnection;
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nsRefPtr<AudioParam> mDelay;
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SelfReference<DelayNode> mPlayingRef;
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};
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}
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}
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#endif
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