1 /*
2  * Copyright (C) 2018 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.BatteryStats;
19 
20 /**
21  * A {@link PowerCalculator} to calculate power consumed by audio and video hardware.
22  *
23  * Also see {@link PowerProfile#POWER_AUDIO} and {@link PowerProfile#POWER_VIDEO}.
24  */
25 public class MediaPowerCalculator extends PowerCalculator {
26     private static final int MS_IN_HR = 1000 * 60 * 60;
27     private final double mAudioAveragePowerMa;
28     private final double mVideoAveragePowerMa;
29 
MediaPowerCalculator(PowerProfile profile)30     public MediaPowerCalculator(PowerProfile profile) {
31         mAudioAveragePowerMa = profile.getAveragePower(PowerProfile.POWER_AUDIO);
32         mVideoAveragePowerMa = profile.getAveragePower(PowerProfile.POWER_VIDEO);
33     }
34 
35     @Override
calculateApp(BatterySipper app, BatteryStats.Uid u, long rawRealtimeUs, long rawUptimeUs, int statsType)36     public void calculateApp(BatterySipper app, BatteryStats.Uid u, long rawRealtimeUs,
37             long rawUptimeUs, int statsType) {
38         // Calculate audio power usage, an estimate based on the average power routed to different
39         // components like speaker, bluetooth, usb-c, earphone, etc.
40         final BatteryStats.Timer audioTimer = u.getAudioTurnedOnTimer();
41         if (audioTimer == null) {
42             app.audioTimeMs = 0;
43             app.audioPowerMah = 0;
44         } else {
45             final long totalTime = audioTimer.getTotalTimeLocked(rawRealtimeUs, statsType) / 1000;
46             app.audioTimeMs = totalTime;
47             app.audioPowerMah = (totalTime * mAudioAveragePowerMa) / MS_IN_HR;
48         }
49 
50         // Calculate video power usage.
51         final BatteryStats.Timer videoTimer = u.getVideoTurnedOnTimer();
52         if (videoTimer == null) {
53             app.videoTimeMs = 0;
54             app.videoPowerMah = 0;
55         } else {
56             final long totalTime = videoTimer.getTotalTimeLocked(rawRealtimeUs, statsType) / 1000;
57             app.videoTimeMs = totalTime;
58             app.videoPowerMah = (totalTime * mVideoAveragePowerMa) / MS_IN_HR;
59         }
60     }
61 }
62