Create //webrtc/api:libjingle_peerconnection_api + refactorings.

webrtc/api/videotrack.h

-/*
- *  Copyright 2012 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#ifndef WEBRTC_API_VIDEOTRACK_H_
-#define WEBRTC_API_VIDEOTRACK_H_
-
-#include <string>
-#include <vector>
-
-#include "webrtc/api/mediastreamtrack.h"
-#include "webrtc/base/scoped_ref_ptr.h"
-#include "webrtc/base/thread_checker.h"
-#include "webrtc/media/base/videosourcebase.h"
-
-namespace webrtc {
-
-class VideoTrack : public MediaStreamTrack<VideoTrackInterface>,
-                   public rtc::VideoSourceBase,
-                   public ObserverInterface {
- public:
-  static rtc::scoped_refptr<VideoTrack> Create(
-      const std::string& label,
-      VideoTrackSourceInterface* source);
-
-  void AddOrUpdateSink(rtc::VideoSinkInterface<VideoFrame>* sink,
-                       const rtc::VideoSinkWants& wants) override;
-  void RemoveSink(rtc::VideoSinkInterface<VideoFrame>* sink) override;
-
-  VideoTrackSourceInterface* GetSource() const override {
-    return video_source_.get();
-  }
-  bool set_enabled(bool enable) override;
-  std::string kind() const override;
-
- protected:
-  VideoTrack(const std::string& id, VideoTrackSourceInterface* video_source);
-  ~VideoTrack();
-
- private:
-  // Implements ObserverInterface. Observes |video_source_| state.
-  void OnChanged() override;
-
-  rtc::ThreadChecker signaling_thread_checker_;
-  rtc::ThreadChecker worker_thread_checker_;
-  rtc::scoped_refptr<VideoTrackSourceInterface> video_source_;
-};
-
-}  // namespace webrtc
-
-#endif  // WEBRTC_API_VIDEOTRACK_H_