import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/media/VideoTrack.h

@@ -0,0 +1,70 @@
+/* -*- 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(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