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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_POWER_VIDEO_ACTIVITY_NOTIFIER_H_ | |
6 #define ASH_SYSTEM_POWER_VIDEO_ACTIVITY_NOTIFIER_H_ | |
7 | |
8 #include "ash/ash_export.h" | |
9 #include "ash/wm/video_detector.h" | |
10 #include "base/compiler_specific.h" | |
11 #include "base/macros.h" | |
12 #include "base/time/time.h" | |
13 | |
14 namespace ash { | |
15 | |
16 // Notifies the power manager when a video is playing. | |
17 class ASH_EXPORT VideoActivityNotifier : public VideoDetector::Observer, | |
18 public ShellObserver { | |
19 public: | |
20 explicit VideoActivityNotifier(VideoDetector* detector); | |
21 ~VideoActivityNotifier() override; | |
22 | |
23 // VideoDetector::Observer implementation. | |
24 void OnVideoStateChanged(VideoDetector::State state) override; | |
25 | |
26 // ShellObserver implementation. | |
27 void OnLockStateChanged(bool locked) override; | |
28 | |
29 // If |notify_timer_| is running, calls MaybeNotifyPowerManager() and returns | |
30 // true. Returns false otherwise. | |
31 bool TriggerTimeoutForTest() WARN_UNUSED_RESULT; | |
32 | |
33 private: | |
34 bool should_notify_power_manager() { | |
35 return video_state_ != VideoDetector::State::NOT_PLAYING && | |
36 !screen_is_locked_; | |
37 } | |
38 | |
39 // Starts or stops |notify_timer_| as needed. | |
40 void UpdateTimer(); | |
41 | |
42 // Notifies powerd about video activity if should_notify_power_manager() is | |
43 // true. | |
44 void MaybeNotifyPowerManager(); | |
45 | |
46 VideoDetector* detector_; // not owned | |
47 | |
48 // Most-recently-observed video state. | |
49 VideoDetector::State video_state_; | |
50 | |
51 // True if the screen is currently locked. | |
52 bool screen_is_locked_; | |
53 | |
54 // Periodically calls MaybeNotifyPowerManager() while | |
55 // should_notify_power_manager() is true. | |
56 base::RepeatingTimer notify_timer_; | |
57 | |
58 DISALLOW_COPY_AND_ASSIGN(VideoActivityNotifier); | |
59 }; | |
60 | |
61 } // namespace ash | |
62 | |
63 #endif // ASH_SYSTEM_POWER_VIDEO_ACTIVITY_NOTIFIER_H_ | |
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