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 */ 16 package com.android.internal.os; 17 18 import android.os.BatteryStats; 19 20 /** 21 * Power calculator for the flashlight. 22 */ 23 public 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
