/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim:set ts=2 sw=2 et tw=78: */

/* 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 mozilla_dom_VideoTrack_h

#define mozilla_dom_VideoTrack_h

#include "MediaTrack.h"

namespace mozilla {

namespace dom {

class VideoTrackList;

class VideoStreamTrack;

class VideoTrack : public MediaTrack

{

public:

  VideoTrack(nsIGlobalObject* aOwnerGlobal,

             const nsAString& aId,

             const nsAString& aKind,

             const nsAString& aLabel,

             const nsAString& aLanguage,

             VideoStreamTrack* aStreamTarck = nullptr);

  NS_DECL_ISUPPORTS_INHERITED

  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(VideoTrack, MediaTrack)

  JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;

  VideoTrack* AsVideoTrack() override

  {

    return this;

  }

  // When fetching media resource, if no video track is selected by the media

  // resource, then the first VideoTrack object in the list is set selected as

  // default. If multiple video tracks are selected by its media resource at

  // fetching phase, then the first enabled video track is set selected.

  // aFlags contains FIRE_NO_EVENTS because no events are fired in such cases.

  void SetEnabledInternal(bool aEnabled, int aFlags) override;

  // Get associated video stream track when the video track comes from

  // MediaStream. This might be nullptr when the src of owning HTMLMediaElement

  // is not MediaStream.

  VideoStreamTrack* GetVideoStreamTrack() { return mVideoStreamTrack; }

  // WebIDL

  bool Selected() const

  {

    return mSelected;

  }

  // Either zero or one video track is selected in a list; If the selected track

  // is in a VideoTrackList, then all the other VideoTrack objects in that list

  // must be unselected.

  void SetSelected(bool aSelected);

private:

  virtual ~VideoTrack();

  bool mSelected;

  RefPtr<VideoStreamTrack> mVideoStreamTrack;

};

} // namespace dom

} // namespace mozilla

#endif // mozilla_dom_VideoTrack_h