content/renderer/media/webrtc/track_observer.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_RENDERER_MEDIA_WEBRTC_TRACK_OBSERVER_H_
   6 #define CONTENT_RENDERER_MEDIA_WEBRTC_TRACK_OBSERVER_H_
   7
   8 #include "base/callback.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/single_thread_task_runner.h"
  11 #include "content/common/content_export.h"
  12 #include "third_party/libjingle/source/talk/app/webrtc/mediastreaminterface.h"
  13
  14 namespace content {
  15
  16 class CONTENT_EXPORT TrackObserver {
  17  public:
  18   typedef base::Callback<void(webrtc::MediaStreamTrackInterface::TrackState)>
  19       OnChangedCallback;
  20
  21   TrackObserver(const scoped_refptr<base::SingleThreadTaskRunner>& main_thread,
  22                 const scoped_refptr<webrtc::MediaStreamTrackInterface>& track);
  23   ~TrackObserver();
  24
  25   void SetCallback(const OnChangedCallback& callback);
  26
  27   const scoped_refptr<webrtc::MediaStreamTrackInterface>& track() const;
  28
  29  private:
  30   class TrackObserverImpl;
  31   const scoped_refptr<TrackObserverImpl> observer_;
  32   DISALLOW_COPY_AND_ASSIGN(TrackObserver);
  33 };
  34
  35 }  // namespace content
  36
  37 #endif  // CONTENT_RENDERER_MEDIA_WEBRTC_TRACK_OBSERVER_H_