| /* |
| * 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.BatteryStats; |
| |
| /** |
| * 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 { |
| private final double mCameraPowerOnAvg; |
| |
| public CameraPowerCalculator(PowerProfile profile) { |
| mCameraPowerOnAvg = profile.getAveragePower(PowerProfile.POWER_CAMERA); |
| } |
| |
| @Override |
| public void calculateApp(BatterySipper app, BatteryStats.Uid u, long rawRealtimeUs, |
| long rawUptimeUs, int statsType) { |
| |
| // Calculate camera power usage. Right now, this is a (very) rough estimate based on the |
| // average power usage for a typical camera application. |
| final BatteryStats.Timer timer = u.getCameraTurnedOnTimer(); |
| if (timer != null) { |
| final long totalTime = timer.getTotalTimeLocked(rawRealtimeUs, statsType) / 1000; |
| app.cameraTimeMs = totalTime; |
| app.cameraPowerMah = (totalTime * mCameraPowerOnAvg) / (1000*60*60); |
| } else { |
| app.cameraTimeMs = 0; |
| app.cameraPowerMah = 0; |
| } |
| } |
| } |