| /* |
| * 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.os.BatteryConsumer; |
| import android.os.BatteryStats; |
| import android.os.BatteryUsageStats; |
| import android.os.BatteryUsageStatsQuery; |
| import android.os.UidBatteryConsumer; |
| |
| /** |
| * Power calculator for the camera subsystem, excluding the flashlight. |
| * |
| * Note: Power draw for the flash unit should be included in the FlashlightPowerCalculator. |
| */ |
| public class CameraPowerCalculator extends PowerCalculator { |
| // Calculate camera power usage. Right now, this is a (very) rough estimate based on the |
| // average power usage for a typical camera application. |
| private final UsageBasedPowerEstimator mPowerEstimator; |
| |
| public CameraPowerCalculator(PowerProfile profile) { |
| mPowerEstimator = new UsageBasedPowerEstimator( |
| profile.getAveragePower(PowerProfile.POWER_CAMERA)); |
| } |
| |
| @Override |
| public void calculate(BatteryUsageStats.Builder builder, BatteryStats batteryStats, |
| long rawRealtimeUs, long rawUptimeUs, BatteryUsageStatsQuery query) { |
| super.calculate(builder, batteryStats, rawRealtimeUs, rawUptimeUs, query); |
| |
| final long durationMs = batteryStats.getCameraOnTime(rawRealtimeUs, |
| BatteryStats.STATS_SINCE_CHARGED) / 1000; |
| final double powerMah = mPowerEstimator.calculatePower(durationMs); |
| builder.getAggregateBatteryConsumerBuilder( |
| BatteryUsageStats.AGGREGATE_BATTERY_CONSUMER_SCOPE_DEVICE) |
| .setUsageDurationMillis(BatteryConsumer.POWER_COMPONENT_CAMERA, durationMs) |
| .setConsumedPower(BatteryConsumer.POWER_COMPONENT_CAMERA, powerMah); |
| builder.getAggregateBatteryConsumerBuilder( |
| BatteryUsageStats.AGGREGATE_BATTERY_CONSUMER_SCOPE_ALL_APPS) |
| .setUsageDurationMillis(BatteryConsumer.POWER_COMPONENT_CAMERA, durationMs) |
| .setConsumedPower(BatteryConsumer.POWER_COMPONENT_CAMERA, powerMah); |
| } |
| |
| @Override |
| protected void calculateApp(UidBatteryConsumer.Builder app, BatteryStats.Uid u, |
| long rawRealtimeUs, long rawUptimeUs, BatteryUsageStatsQuery query) { |
| final long durationMs = |
| mPowerEstimator.calculateDuration(u.getCameraTurnedOnTimer(), rawRealtimeUs, |
| BatteryStats.STATS_SINCE_CHARGED); |
| final double powerMah = mPowerEstimator.calculatePower(durationMs); |
| app.setUsageDurationMillis(BatteryConsumer.POWER_COMPONENT_CAMERA, durationMs) |
| .setConsumedPower(BatteryConsumer.POWER_COMPONENT_CAMERA, powerMah); |
| } |
| |
| @Override |
| protected void calculateApp(BatterySipper app, BatteryStats.Uid u, long rawRealtimeUs, |
| long rawUptimeUs, int statsType) { |
| final long durationMs = mPowerEstimator.calculateDuration(u.getCameraTurnedOnTimer(), |
| rawRealtimeUs, statsType); |
| final double powerMah = mPowerEstimator.calculatePower(durationMs); |
| app.cameraTimeMs = durationMs; |
| app.cameraPowerMah = powerMah; |
| } |
| } |