ash/system/chromeos/power/video_activity_notifier.cc

   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 #include "ash/system/chromeos/power/video_activity_notifier.h"
   6
   7 #include "ash/shell.h"
   8 #include "chromeos/dbus/dbus_thread_manager.h"
   9 #include "chromeos/dbus/power_manager_client.h"
  10
  11 namespace ash {
  12 namespace {
  13
  14 // Minimum number of seconds between notifications.
  15 const int kNotifyIntervalSec = 5;
  16
  17 }  // namespace
  18
  19 VideoActivityNotifier::VideoActivityNotifier(VideoDetector* detector)
  20     : detector_(detector),
  21       screen_is_locked_(false) {
  22   detector_->AddObserver(this);
  23   ash::Shell::GetInstance()->AddShellObserver(this);
  24 }
  25
  26 VideoActivityNotifier::~VideoActivityNotifier() {
  27   ash::Shell::GetInstance()->RemoveShellObserver(this);
  28   detector_->RemoveObserver(this);
  29 }
  30
  31 void VideoActivityNotifier::OnVideoDetected(bool is_fullscreen) {
  32   if (screen_is_locked_)
  33     return;
  34
  35   base::TimeTicks now = base::TimeTicks::Now();
  36   if (last_notify_time_.is_null() ||
  37       (now - last_notify_time_).InSeconds() >= kNotifyIntervalSec) {
  38     chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->
  39         NotifyVideoActivity(is_fullscreen);
  40     last_notify_time_ = now;
  41   }
  42 }
  43
  44 void VideoActivityNotifier::OnLockStateChanged(bool locked) {
  45   screen_is_locked_ = locked;
  46 }
  47
  48 }  // namespace ash