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 #define LOG_TAG "BatteryNotifier" 18 //#define LOG_NDEBUG 0 19 20 #include "include/mediautils/BatteryNotifier.h" 21 22 #include <binder/IServiceManager.h> 23 #include <utils/Log.h> 24 #include <private/android_filesystem_config.h> 25 26 namespace android { 27 28 void BatteryNotifier::DeathNotifier::binderDied(const wp<IBinder>& /*who*/) { 29 BatteryNotifier::getInstance().onBatteryStatServiceDied(); 30 } 31 32 BatteryNotifier::BatteryNotifier() {} 33 34 BatteryNotifier::~BatteryNotifier() { 35 Mutex::Autolock _l(mLock); 36 if (mDeathNotifier != nullptr) { 37 IInterface::asBinder(mBatteryStatService)->unlinkToDeath(mDeathNotifier); 38 } 39 } 40 41 void BatteryNotifier::noteStartVideo(uid_t uid) { 42 Mutex::Autolock _l(mLock); 43 sp<IBatteryStats> batteryService = getBatteryService_l(); 44 if (mVideoRefCounts[uid] == 0 && batteryService != nullptr) { 45 batteryService->noteStartVideo(uid); 46 } 47 mVideoRefCounts[uid]++; 48 } 49 50 void BatteryNotifier::noteStopVideo(uid_t uid) { 51 Mutex::Autolock _l(mLock); 52 if (mVideoRefCounts.find(uid) == mVideoRefCounts.end()) { 53 ALOGW("%s: video refcount is broken for uid(%d).", __FUNCTION__, (int)uid); 54 return; 55 } 56 57 sp<IBatteryStats> batteryService = getBatteryService_l(); 58 59 mVideoRefCounts[uid]--; 60 if (mVideoRefCounts[uid] == 0) { 61 if (batteryService != nullptr) { 62 batteryService->noteStopVideo(uid); 63 } 64 mVideoRefCounts.erase(uid); 65 } 66 } 67 68 void BatteryNotifier::noteResetVideo() { 69 Mutex::Autolock _l(mLock); 70 sp<IBatteryStats> batteryService = getBatteryService_l(); 71 mVideoRefCounts.clear(); 72 if (batteryService != nullptr) { 73 batteryService->noteResetVideo(); 74 } 75 } 76 77 void BatteryNotifier::noteStartAudio(uid_t uid) { 78 Mutex::Autolock _l(mLock); 79 sp<IBatteryStats> batteryService = getBatteryService_l(); 80 if (mAudioRefCounts[uid] == 0 && batteryService != nullptr) { 81 batteryService->noteStartAudio(uid); 82 } 83 mAudioRefCounts[uid]++; 84 } 85 86 void BatteryNotifier::noteStopAudio(uid_t uid) { 87 Mutex::Autolock _l(mLock); 88 if (mAudioRefCounts.find(uid) == mAudioRefCounts.end()) { 89 ALOGW("%s: audio refcount is broken for uid(%d).", __FUNCTION__, (int)uid); 90 return; 91 } 92 93 sp<IBatteryStats> batteryService = getBatteryService_l(); 94 95 mAudioRefCounts[uid]--; 96 if (mAudioRefCounts[uid] == 0) { 97 if (batteryService != nullptr) { 98 batteryService->noteStopAudio(uid); 99 } 100 mAudioRefCounts.erase(uid); 101 } 102 } 103 104 void BatteryNotifier::noteResetAudio() { 105 Mutex::Autolock _l(mLock); 106 sp<IBatteryStats> batteryService = getBatteryService_l(); 107 mAudioRefCounts.clear(); 108 if (batteryService != nullptr) { 109 batteryService->noteResetAudio(); 110 } 111 } 112 113 void BatteryNotifier::noteFlashlightOn(const String8& id, uid_t uid) { 114 Mutex::Autolock _l(mLock); 115 sp<IBatteryStats> batteryService = getBatteryService_l(); 116 117 std::pair<String8, uid_t> k = std::make_pair(id, uid); 118 if (!mFlashlightState[k]) { 119 mFlashlightState[k] = true; 120 if (batteryService != nullptr) { 121 batteryService->noteFlashlightOn(uid); 122 } 123 } 124 } 125 126 void BatteryNotifier::noteFlashlightOff(const String8& id, uid_t uid) { 127 Mutex::Autolock _l(mLock); 128 sp<IBatteryStats> batteryService = getBatteryService_l(); 129 130 std::pair<String8, uid_t> k = std::make_pair(id, uid); 131 if (mFlashlightState[k]) { 132 mFlashlightState[k] = false; 133 if (batteryService != nullptr) { 134 batteryService->noteFlashlightOff(uid); 135 } 136 } 137 } 138 139 void BatteryNotifier::noteResetFlashlight() { 140 Mutex::Autolock _l(mLock); 141 sp<IBatteryStats> batteryService = getBatteryService_l(); 142 mFlashlightState.clear(); 143 if (batteryService != nullptr) { 144 batteryService->noteResetFlashlight(); 145 } 146 } 147 148 void BatteryNotifier::noteStartCamera(const String8& id, uid_t uid) { 149 Mutex::Autolock _l(mLock); 150 sp<IBatteryStats> batteryService = getBatteryService_l(); 151 std::pair<String8, uid_t> k = std::make_pair(id, uid); 152 if (!mCameraState[k]) { 153 mCameraState[k] = true; 154 if (batteryService != nullptr) { 155 batteryService->noteStartCamera(uid); 156 } 157 } 158 } 159 160 void BatteryNotifier::noteStopCamera(const String8& id, uid_t uid) { 161 Mutex::Autolock _l(mLock); 162 sp<IBatteryStats> batteryService = getBatteryService_l(); 163 std::pair<String8, uid_t> k = std::make_pair(id, uid); 164 if (mCameraState[k]) { 165 mCameraState[k] = false; 166 if (batteryService != nullptr) { 167 batteryService->noteStopCamera(uid); 168 } 169 } 170 } 171 172 void BatteryNotifier::noteResetCamera() { 173 Mutex::Autolock _l(mLock); 174 sp<IBatteryStats> batteryService = getBatteryService_l(); 175 mCameraState.clear(); 176 if (batteryService != nullptr) { 177 batteryService->noteResetCamera(); 178 } 179 } 180 181 void BatteryNotifier::onBatteryStatServiceDied() { 182 Mutex::Autolock _l(mLock); 183 mBatteryStatService.clear(); 184 mDeathNotifier.clear(); 185 // Do not reset mVideoRefCounts and mAudioRefCounts here. The ref 186 // counting is independent of the battery service availability. 187 // We need this if battery service becomes available after media 188 // started. 189 190 } 191 192 sp<IBatteryStats> BatteryNotifier::getBatteryService_l() { 193 if (mBatteryStatService != nullptr) { 194 return mBatteryStatService; 195 } 196 // Get battery service from service manager 197 const sp<IServiceManager> sm(defaultServiceManager()); 198 if (sm != nullptr) { 199 const String16 name("batterystats"); 200 mBatteryStatService = interface_cast<IBatteryStats>(sm->checkService(name)); 201 if (mBatteryStatService == nullptr) { 202 // this may occur normally during the init sequence as mediaserver 203 // and audioserver start before the batterystats service is available. 204 ALOGW("batterystats service unavailable!"); 205 return nullptr; 206 } 207 208 mDeathNotifier = new DeathNotifier(); 209 IInterface::asBinder(mBatteryStatService)->linkToDeath(mDeathNotifier); 210 211 // Notify start now if mediaserver or audioserver is already started. 212 // 1) mediaserver and audioserver is started before batterystats service 213 // 2) batterystats server may have crashed. 214 std::map<uid_t, int>::iterator it = mVideoRefCounts.begin(); 215 for (; it != mVideoRefCounts.end(); ++it) { 216 mBatteryStatService->noteStartVideo(it->first); 217 } 218 it = mAudioRefCounts.begin(); 219 for (; it != mAudioRefCounts.end(); ++it) { 220 mBatteryStatService->noteStartAudio(it->first); 221 } 222 // TODO: Notify for camera and flashlight state as well? 223 } 224 return mBatteryStatService; 225 } 226 227 ANDROID_SINGLETON_STATIC_INSTANCE(BatteryNotifier); 228 229 } // namespace android 230
