content: /*
   * Copyright (C) 2015 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.android.internal.os;
  
  import android.hardware.Sensor;
  import android.hardware.SensorManager;
  import android.os.BatteryStats;
  import android.util.SparseArray;
  
  import com.android.internal.location.gnssmetrics.GnssMetrics;
  
  import java.util.List;
  
  public class SensorPowerCalculator extends PowerCalculator {
      private final List<Sensor> mSensors;
      private final double mGpsPower;
  
      public SensorPowerCalculator(PowerProfile profile, SensorManager sensorManager,
              BatteryStats stats, long rawRealtimeUs, int statsType) {
          mSensors = sensorManager.getSensorList(Sensor.TYPE_ALL);
          mGpsPower = getAverageGpsPower(profile, stats, rawRealtimeUs, statsType);
      }
  
      @Override
      public void calculateApp(BatterySipper app, BatteryStats.Uid u, long rawRealtimeUs,
              long rawUptimeUs, int statsType) {
          // Process Sensor usage
          final SparseArray<? extends BatteryStats.Uid.Sensor> sensorStats = u.getSensorStats();
          final int NSE = sensorStats.size();
          for (int ise = 0; ise < NSE; ise++) {
              final BatteryStats.Uid.Sensor sensor = sensorStats.valueAt(ise);
              final int sensorHandle = sensorStats.keyAt(ise);
              final BatteryStats.Timer timer = sensor.getSensorTime();
              final long sensorTime = timer.getTotalTimeLocked(rawRealtimeUs, statsType) / 1000;
  
              switch (sensorHandle) {
                  case BatteryStats.Uid.Sensor.GPS:
                      app.gpsTimeMs = sensorTime;
                      app.gpsPowerMah = (app.gpsTimeMs * mGpsPower) / (1000*60*60);
                      break;
                  default:
                      final int sensorsCount = mSensors.size();
                      for (int i = 0; i < sensorsCount; i++) {
                          final Sensor s = mSensors.get(i);
                          if (s.getHandle() == sensorHandle) {
                              app.sensorPowerMah += (sensorTime * s.getPower()) / (1000*60*60);
                              break;
                          }
                      }
                      break;
              }
          }
      }
  
      private double getAverageGpsPower(PowerProfile profile, BatteryStats stats, long rawRealtimeUs,
              int statsType) {
          double averagePower =
                  profile.getAveragePowerOrDefault(PowerProfile.POWER_GPS_ON, -1);
          if (averagePower != -1) {
              return averagePower;
          }
          averagePower = 0;
          long totalTime = 0;
          double totalPower = 0;
          for (int i = 0; i < GnssMetrics.NUM_GPS_SIGNAL_QUALITY_LEVELS; i++) {
              long timePerLevel = stats.getGpsSignalQualityTime(i, rawRealtimeUs, statsType);
              totalTime += timePerLevel;
              totalPower += profile.getAveragePower(PowerProfile.POWER_GPS_SIGNAL_QUALITY_BASED, i)
                      * timePerLevel;
          }
          if (totalTime != 0) {
              averagePower = totalPower / totalTime;
          }
          return averagePower;
      }
  }
  