1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16package com.android.internal.os;
17
18import android.os.BatteryStats;
19
20/**
21 * Power calculator for the flashlight.
22 */
23public class FlashlightPowerCalculator extends PowerCalculator {
24    private final double mFlashlightPowerOnAvg;
25
26    public FlashlightPowerCalculator(PowerProfile profile) {
27        mFlashlightPowerOnAvg = profile.getAveragePower(PowerProfile.POWER_FLASHLIGHT);
28    }
29
30    @Override
31    public void calculateApp(BatterySipper app, BatteryStats.Uid u, long rawRealtimeUs,
32                             long rawUptimeUs, int statsType) {
33
34        // Calculate flashlight power usage.  Right now, this is based on the average power draw
35        // of the flash unit when kept on over a short period of time.
36        final BatteryStats.Timer timer = u.getFlashlightTurnedOnTimer();
37        if (timer != null) {
38            final long totalTime = timer.getTotalTimeLocked(rawRealtimeUs, statsType) / 1000;
39            app.flashlightTimeMs = totalTime;
40            app.flashlightPowerMah = (totalTime * mFlashlightPowerOnAvg) / (1000*60*60);
41        } else {
42            app.flashlightTimeMs = 0;
43            app.flashlightPowerMah = 0;
44        }
45    }
46}
47