gecko-dev/dom/media/MediaStreamTrack.h

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2.4 KiB
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MEDIASTREAMTRACK_H_
#define MEDIASTREAMTRACK_H_
#include "mozilla/DOMEventTargetHelper.h"
#include "nsID.h"
#include "StreamBuffer.h"
#include "MediaTrackConstraints.h"
namespace mozilla {
class DOMMediaStream;
namespace dom {
class AudioStreamTrack;
class VideoStreamTrack;
/**
* Class representing a track in a DOMMediaStream.
*/
class MediaStreamTrack : public DOMEventTargetHelper {
public:
/**
* aTrackID is the MediaStreamGraph track ID for the track in the
* MediaStream owned by aStream.
*/
MediaStreamTrack(DOMMediaStream* aStream, TrackID aTrackID);
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(MediaStreamTrack,
DOMEventTargetHelper)
DOMMediaStream* GetParentObject() const { return mOwningStream; }
virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override = 0;
/**
* Returns the DOMMediaStream owning this track.
*/
DOMMediaStream* GetStream() const { return mOwningStream; }
/**
* Returns the TrackID this stream has in its owning DOMMediaStream's Owned
* stream.
*/
TrackID GetTrackID() const { return mTrackID; }
virtual AudioStreamTrack* AsAudioStreamTrack() { return nullptr; }
virtual VideoStreamTrack* AsVideoStreamTrack() { return nullptr; }
// WebIDL
virtual void GetKind(nsAString& aKind) = 0;
void GetId(nsAString& aID) const;
void GetLabel(nsAString& aLabel) { aLabel.Truncate(); }
bool Enabled() { return mEnabled; }
void SetEnabled(bool aEnabled);
void Stop();
already_AddRefed<Promise>
ApplyConstraints(const dom::MediaTrackConstraints& aConstraints, ErrorResult &aRv);
bool Ended() const { return mEnded; }
// Notifications from the MediaStreamGraph
void NotifyEnded() { mEnded = true; }
// Webrtc allows the remote side to name tracks whatever it wants, and we
// need to surface this to content.
void AssignId(const nsAString& aID) { mID = aID; }
protected:
virtual ~MediaStreamTrack();
RefPtr<DOMMediaStream> mOwningStream;
TrackID mTrackID;
nsString mID;
bool mEnded;
bool mEnabled;
};
} // namespace dom
} // namespace mozilla
#endif /* MEDIASTREAMTRACK_H_ */