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154304a084
This patch would try to start a blocked AudioContext when it creates a MediaStreamAudioSourceNode which has an active input stream or when a node's inactive stream becomes active, which means someone is feeding input data to AudioContext. Therefore, we can do the similar thing like what we did for AudioScheduledSourceNode and MediaElementAudioSourceNode, to start AudioContext if current autoplay policy has allowed AudioContext to start. Differential Revision: https://phabricator.services.mozilla.com/D18576 --HG-- extra : moz-landing-system : lando
112 lines
3.5 KiB
C++
112 lines
3.5 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 MediaStreamAudioSourceNode_h_
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#define MediaStreamAudioSourceNode_h_
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#include "AudioNode.h"
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#include "DOMMediaStream.h"
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#include "AudioNodeEngine.h"
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namespace mozilla {
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namespace dom {
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class AudioContext;
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struct MediaStreamAudioSourceOptions;
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class MediaStreamAudioSourceNodeEngine final : public AudioNodeEngine {
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public:
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explicit MediaStreamAudioSourceNodeEngine(AudioNode* aNode)
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: AudioNodeEngine(aNode), mEnabled(false) {}
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bool IsEnabled() const { return mEnabled; }
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enum Parameters { ENABLE };
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void SetInt32Parameter(uint32_t aIndex, int32_t aValue) override {
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switch (aIndex) {
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case ENABLE:
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mEnabled = !!aValue;
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break;
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default:
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NS_ERROR("MediaStreamAudioSourceNodeEngine bad parameter index");
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}
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}
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private:
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bool mEnabled;
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};
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class MediaStreamAudioSourceNode
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: public AudioNode,
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public DOMMediaStream::TrackListener,
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public PrincipalChangeObserver<MediaStreamTrack> {
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public:
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static already_AddRefed<MediaStreamAudioSourceNode> Create(
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AudioContext& aContext, const MediaStreamAudioSourceOptions& aOptions,
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ErrorResult& aRv);
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(MediaStreamAudioSourceNode,
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AudioNode)
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static already_AddRefed<MediaStreamAudioSourceNode> Constructor(
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const GlobalObject& aGlobal, AudioContext& aAudioContext,
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const MediaStreamAudioSourceOptions& aOptions, ErrorResult& aRv) {
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return Create(aAudioContext, aOptions, aRv);
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}
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JSObject* WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) override;
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void DestroyMediaStream() override;
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uint16_t NumberOfInputs() const override { return 0; }
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const char* NodeType() const override { return "MediaStreamAudioSourceNode"; }
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virtual const char* CrossOriginErrorString() const {
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return "MediaStreamAudioSourceNodeCrossOrigin";
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}
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size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;
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size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;
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// Attaches to aTrack so that its audio content will be used as input.
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void AttachToTrack(const RefPtr<MediaStreamTrack>& aTrack);
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// Detaches from the currently attached track if there is one.
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void DetachFromTrack();
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// Attaches to the first available audio track in aMediaStream.
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void AttachToFirstTrack(const RefPtr<DOMMediaStream>& aMediaStream);
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// From DOMMediaStream::TrackListener.
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void NotifyTrackAdded(const RefPtr<MediaStreamTrack>& aTrack) override;
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void NotifyTrackRemoved(const RefPtr<MediaStreamTrack>& aTrack) override;
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void NotifyActive() override;
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// From PrincipalChangeObserver<MediaStreamTrack>.
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void PrincipalChanged(MediaStreamTrack* aMediaStreamTrack) override;
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protected:
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explicit MediaStreamAudioSourceNode(AudioContext* aContext);
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void Init(DOMMediaStream* aMediaStream, ErrorResult& aRv);
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virtual void Destroy();
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virtual ~MediaStreamAudioSourceNode();
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private:
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RefPtr<MediaInputPort> mInputPort;
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RefPtr<DOMMediaStream> mInputStream;
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// On construction we set this to the first audio track of mInputStream.
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RefPtr<MediaStreamTrack> mInputTrack;
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};
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} // namespace dom
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} // namespace mozilla
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#endif
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