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      1 /*
      2  * Copyright 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 
     17 #ifndef MEDIA_BATTERY_NOTIFIER_H
     18 #define MEDIA_BATTERY_NOTIFIER_H
     19 
     20 #include <binder/IBatteryStats.h>
     21 #include <utils/Singleton.h>
     22 #include <utils/String8.h>
     23 
     24 #include <map>
     25 #include <utility>
     26 
     27 namespace android {
     28 
     29 /**
     30  * Class used for logging battery life events in mediaserver.
     31  */
     32 class BatteryNotifier : public Singleton<BatteryNotifier> {
     33 
     34     friend class Singleton<BatteryNotifier>;
     35     BatteryNotifier();
     36 
     37 public:
     38     ~BatteryNotifier();
     39 
     40     void noteStartVideo();
     41     void noteStopVideo();
     42     void noteResetVideo();
     43     void noteStartAudio();
     44     void noteStopAudio();
     45     void noteResetAudio();
     46     void noteFlashlightOn(const String8& id, int uid);
     47     void noteFlashlightOff(const String8& id, int uid);
     48     void noteResetFlashlight();
     49     void noteStartCamera(const String8& id, int uid);
     50     void noteStopCamera(const String8& id, int uid);
     51     void noteResetCamera();
     52 
     53 private:
     54     void onBatteryStatServiceDied();
     55 
     56     class DeathNotifier : public IBinder::DeathRecipient {
     57         virtual void binderDied(const wp<IBinder>& /*who*/);
     58     };
     59 
     60     Mutex mLock;
     61     int mVideoRefCount;
     62     int mAudioRefCount;
     63     std::map<std::pair<String8, int>, bool> mFlashlightState;
     64     std::map<std::pair<String8, int>, bool> mCameraState;
     65     sp<IBatteryStats> mBatteryStatService;
     66     sp<DeathNotifier> mDeathNotifier;
     67 
     68     sp<IBatteryStats> getBatteryService_l();
     69 };
     70 
     71 }  // namespace android
     72 
     73 #endif // MEDIA_BATTERY_NOTIFIER_H
     74