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.BatteryConsumer; 19 import android.os.BatteryStats; 20 import android.os.BatteryUsageStats; 21 import android.os.BatteryUsageStatsQuery; 22 import android.os.UidBatteryConsumer; 23 24 /** 25 * Power calculator for the camera subsystem, excluding the flashlight. 26 * 27 * Note: Power draw for the flash unit should be included in the FlashlightPowerCalculator. 28 */ 29 public class CameraPowerCalculator extends PowerCalculator { 30 // Calculate camera power usage. Right now, this is a (very) rough estimate based on the 31 // average power usage for a typical camera application. 32 private final UsageBasedPowerEstimator mPowerEstimator; 33 CameraPowerCalculator(PowerProfile profile)34 public CameraPowerCalculator(PowerProfile profile) { 35 mPowerEstimator = new UsageBasedPowerEstimator( 36 profile.getAveragePower(PowerProfile.POWER_CAMERA)); 37 } 38 39 @Override calculate(BatteryUsageStats.Builder builder, BatteryStats batteryStats, long rawRealtimeUs, long rawUptimeUs, BatteryUsageStatsQuery query)40 public void calculate(BatteryUsageStats.Builder builder, BatteryStats batteryStats, 41 long rawRealtimeUs, long rawUptimeUs, BatteryUsageStatsQuery query) { 42 super.calculate(builder, batteryStats, rawRealtimeUs, rawUptimeUs, query); 43 44 final long durationMs = batteryStats.getCameraOnTime(rawRealtimeUs, 45 BatteryStats.STATS_SINCE_CHARGED) / 1000; 46 final double powerMah = mPowerEstimator.calculatePower(durationMs); 47 builder.getAggregateBatteryConsumerBuilder( 48 BatteryUsageStats.AGGREGATE_BATTERY_CONSUMER_SCOPE_DEVICE) 49 .setUsageDurationMillis(BatteryConsumer.POWER_COMPONENT_CAMERA, durationMs) 50 .setConsumedPower(BatteryConsumer.POWER_COMPONENT_CAMERA, powerMah); 51 builder.getAggregateBatteryConsumerBuilder( 52 BatteryUsageStats.AGGREGATE_BATTERY_CONSUMER_SCOPE_ALL_APPS) 53 .setUsageDurationMillis(BatteryConsumer.POWER_COMPONENT_CAMERA, durationMs) 54 .setConsumedPower(BatteryConsumer.POWER_COMPONENT_CAMERA, powerMah); 55 } 56 57 @Override calculateApp(UidBatteryConsumer.Builder app, BatteryStats.Uid u, long rawRealtimeUs, long rawUptimeUs, BatteryUsageStatsQuery query)58 protected void calculateApp(UidBatteryConsumer.Builder app, BatteryStats.Uid u, 59 long rawRealtimeUs, long rawUptimeUs, BatteryUsageStatsQuery query) { 60 final long durationMs = 61 mPowerEstimator.calculateDuration(u.getCameraTurnedOnTimer(), rawRealtimeUs, 62 BatteryStats.STATS_SINCE_CHARGED); 63 final double powerMah = mPowerEstimator.calculatePower(durationMs); 64 app.setUsageDurationMillis(BatteryConsumer.POWER_COMPONENT_CAMERA, durationMs) 65 .setConsumedPower(BatteryConsumer.POWER_COMPONENT_CAMERA, powerMah); 66 } 67 68 @Override calculateApp(BatterySipper app, BatteryStats.Uid u, long rawRealtimeUs, long rawUptimeUs, int statsType)69 protected void calculateApp(BatterySipper app, BatteryStats.Uid u, long rawRealtimeUs, 70 long rawUptimeUs, int statsType) { 71 final long durationMs = mPowerEstimator.calculateDuration(u.getCameraTurnedOnTimer(), 72 rawRealtimeUs, statsType); 73 final double powerMah = mPowerEstimator.calculatePower(durationMs); 74 app.cameraTimeMs = durationMs; 75 app.cameraPowerMah = powerMah; 76 } 77 } 78