ash/system/chromeos/power/video_activity_notifier.h

   1 // Copyright 2013 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 ASH_SYSTEM_CHROMEOS_POWER_VIDEO_ACTIVITY_NOTIFIER_H_
   6 #define ASH_SYSTEM_CHROMEOS_POWER_VIDEO_ACTIVITY_NOTIFIER_H_
   7
   8 #include "ash/wm/video_detector.h"
   9 #include "base/basictypes.h"
  10 #include "base/compiler_specific.h"
  11 #include "base/time/time.h"
  12
  13 namespace ash {
  14
  15 // Notifies the power manager when a video is playing.
  16 class VideoActivityNotifier : public VideoDetectorObserver,
  17                               public ShellObserver {
  18  public:
  19   explicit VideoActivityNotifier(VideoDetector* detector);
  20   virtual ~VideoActivityNotifier();
  21
  22   // VideoDetectorObserver implementation.
  23   virtual void OnVideoDetected(bool is_fullscreen) OVERRIDE;
  24
  25   // ShellObserver implementation.
  26   virtual void OnLockStateChanged(bool locked) OVERRIDE;
  27
  28  private:
  29   VideoDetector* detector_;  // not owned
  30
  31   // Last time that the power manager was notified.
  32   base::TimeTicks last_notify_time_;
  33
  34   // True if the screen is currently locked.
  35   bool screen_is_locked_;
  36
  37   DISALLOW_COPY_AND_ASSIGN(VideoActivityNotifier);
  38 };
  39
  40 }  // namespace ash
  41
  42 #endif  // ASH_SYSTEM_CHROMEOS_POWER_VIDEO_ACTIVITY_NOTIFIER_H_