зеркало из https://github.com/mozilla/gecko-dev.git
118 строки
3.5 KiB
C++
118 строки
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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{
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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 {
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ENABLE
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};
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void SetInt32Parameter(uint32_t aIndex, int32_t aValue) override
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{
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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 : public AudioNode,
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public DOMMediaStream::TrackListener,
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public PrincipalChangeObserver<MediaStreamTrack>
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{
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public:
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static already_AddRefed<MediaStreamAudioSourceNode>
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Create(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, AudioNode)
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static already_AddRefed<MediaStreamAudioSourceNode>
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Constructor(const GlobalObject& aGlobal, AudioContext& aAudioContext,
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const MediaStreamAudioSourceOptions& aOptions, ErrorResult& aRv)
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{
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return Create(aAudioContext, aOptions, aRv);
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}
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JSObject* WrapObject(JSContext* aCx, 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
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{
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return "MediaStreamAudioSourceNode";
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}
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virtual const char* CrossOriginErrorString() const
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{
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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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// 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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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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