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.hardware.Sensor; 19 import android.hardware.SensorManager; 20 import android.os.BatteryStats; 21 import android.util.SparseArray; 22 23 import com.android.internal.location.gnssmetrics.GnssMetrics; 24 25 import java.util.List; 26 27 public class SensorPowerCalculator extends PowerCalculator { 28 private final List<Sensor> mSensors; 29 private final double mGpsPower; 30 SensorPowerCalculator(PowerProfile profile, SensorManager sensorManager, BatteryStats stats, long rawRealtimeUs, int statsType)31 public SensorPowerCalculator(PowerProfile profile, SensorManager sensorManager, 32 BatteryStats stats, long rawRealtimeUs, int statsType) { 33 mSensors = sensorManager.getSensorList(Sensor.TYPE_ALL); 34 mGpsPower = getAverageGpsPower(profile, stats, rawRealtimeUs, statsType); 35 } 36 37 @Override calculateApp(BatterySipper app, BatteryStats.Uid u, long rawRealtimeUs, long rawUptimeUs, int statsType)38 public void calculateApp(BatterySipper app, BatteryStats.Uid u, long rawRealtimeUs, 39 long rawUptimeUs, int statsType) { 40 // Process Sensor usage 41 final SparseArray<? extends BatteryStats.Uid.Sensor> sensorStats = u.getSensorStats(); 42 final int NSE = sensorStats.size(); 43 for (int ise = 0; ise < NSE; ise++) { 44 final BatteryStats.Uid.Sensor sensor = sensorStats.valueAt(ise); 45 final int sensorHandle = sensorStats.keyAt(ise); 46 final BatteryStats.Timer timer = sensor.getSensorTime(); 47 final long sensorTime = timer.getTotalTimeLocked(rawRealtimeUs, statsType) / 1000; 48 49 switch (sensorHandle) { 50 case BatteryStats.Uid.Sensor.GPS: 51 app.gpsTimeMs = sensorTime; 52 app.gpsPowerMah = (app.gpsTimeMs * mGpsPower) / (1000*60*60); 53 break; 54 default: 55 final int sensorsCount = mSensors.size(); 56 for (int i = 0; i < sensorsCount; i++) { 57 final Sensor s = mSensors.get(i); 58 if (s.getHandle() == sensorHandle) { 59 app.sensorPowerMah += (sensorTime * s.getPower()) / (1000*60*60); 60 break; 61 } 62 } 63 break; 64 } 65 } 66 } 67 getAverageGpsPower(PowerProfile profile, BatteryStats stats, long rawRealtimeUs, int statsType)68 private double getAverageGpsPower(PowerProfile profile, BatteryStats stats, long rawRealtimeUs, 69 int statsType) { 70 double averagePower = 71 profile.getAveragePowerOrDefault(PowerProfile.POWER_GPS_ON, -1); 72 if (averagePower != -1) { 73 return averagePower; 74 } 75 averagePower = 0; 76 long totalTime = 0; 77 double totalPower = 0; 78 for (int i = 0; i < GnssMetrics.NUM_GPS_SIGNAL_QUALITY_LEVELS; i++) { 79 long timePerLevel = stats.getGpsSignalQualityTime(i, rawRealtimeUs, statsType); 80 totalTime += timePerLevel; 81 totalPower += profile.getAveragePower(PowerProfile.POWER_GPS_SIGNAL_QUALITY_BASED, i) 82 * timePerLevel; 83 } 84 if (totalTime != 0) { 85 averagePower = totalPower / totalTime; 86 } 87 return averagePower; 88 } 89 } 90