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