dom/media/VideoTrack.h
author Mike Hommey <mh+mozilla@glandium.org>
Fri, 11 Jan 2019 16:01:15 +0000
changeset 453570 daf50f25895db073e44d50fecf2e4f6fe873865d
parent 446960 0ceae9db9ec0be18daa1a279511ad305723185d4
permissions -rw-r--r--
Bug 1519307 - Add a new project to build useful parts of breakpad independently. r=froydnj With `ac_add_options --enable-project=tools/crashreporter` in a mozconfig, `./mach build` builds minidump_stackwalk, dump_syms and fileid. One caveat is that due to limitation in how the build system works currently, it's cumbersome to keep dump_syms as a host program for Gecko, and to make it a target program for this project. For now, keep it as a host program. We're not going to use it on automation, but it's still convenient to have for quick local builds (I've had to resort to awful hacks downstream). Differential Revision: https://phabricator.services.mozilla.com/D16299

/* -*- 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