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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_ANDROID_BATTERY_METRICS_H_
#define CONTENT_BROWSER_ANDROID_BATTERY_METRICS_H_
#include "base/android/radio_utils.h"
#include "base/no_destructor.h"
#include "base/power_monitor/power_observer.h"
#include "base/sequence_checker.h"
#include "base/task/sequenced_task_runner.h"
#include "base/timer/timer.h"
#include "content/common/process_visibility_tracker.h"
namespace content {
// Records metrics around battery usage on Android. The metrics are only tracked
// while the device is not charging and the app is visible. This class is not
// thread-safe.
class AndroidBatteryMetrics
: public base::PowerStateObserver,
public base::PowerThermalObserver,
public ProcessVisibilityTracker::ProcessVisibilityObserver {
public:
static void CreateInstance();
AndroidBatteryMetrics(const AndroidBatteryMetrics&) = delete;
AndroidBatteryMetrics& operator=(const AndroidBatteryMetrics&) = delete;
private:
friend class base::NoDestructor<AndroidBatteryMetrics>;
AndroidBatteryMetrics();
~AndroidBatteryMetrics() override;
void InitializeOnSequence();
// ProcessVisibilityTracker::ProcessVisibilityObserver implementation:
void OnVisibilityChanged(bool visible) override;
// base::PowerStateObserver implementation:
void OnPowerStateChange(bool on_battery_power) override;
// base::PowerThermalObserver implementation:
void OnThermalStateChange(DeviceThermalState new_state) override;
void OnSpeedLimitChange(int speed_limit) override;
void UpdateMetricsEnabled();
void CaptureAndReportMetrics(bool disabling);
void UpdateAndReportRadio();
void MonitorRadioState();
// Whether or not we've seen at least two consecutive capacity drops while
// the embedding app was visible. Battery drain reported prior to this could
// be caused by a different app.
bool IsMeasuringDrainExclusively() const;
// Battery drain is captured and reported periodically in this interval while
// the device is on battery power and the app is visible.
static constexpr base::TimeDelta kMetricsInterval = base::Seconds(30);
// Radio state is polled with this interval to count radio wakeups.
static constexpr base::TimeDelta kRadioStateInterval = base::Seconds(1);
scoped_refptr<base::SequencedTaskRunner> task_runner_;
bool app_visible_ = false;
bool on_battery_power_ = false;
int last_remaining_capacity_uah_ = 0;
int64_t last_tx_bytes_ = -1;
int64_t last_rx_bytes_ = -1;
base::android::RadioDataActivity last_activity_ =
base::android::RadioDataActivity::kNone;
int radio_wakeups_ = 0;
base::RepeatingTimer metrics_timer_;
base::RepeatingTimer radio_state_timer_;
int skipped_timers_ = 0;
// Number of consecutive charge drops seen while the app has been visible.
int observed_capacity_drops_ = 0;
SEQUENCE_CHECKER(sequence_checker_);
};
} // namespace content
#endif // CONTENT_BROWSER_ANDROID_BATTERY_METRICS_H_
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