1 /*
2  * Copyright (C) 2019 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_NDEBUG 0
18 #define LOG_TAG "MediaTranscodingService"
19 #include "MediaTranscodingService.h"
20 
21 #include <android/binder_manager.h>
22 #include <android/binder_process.h>
23 #include <android/permission_manager.h>
24 #include <cutils/properties.h>
25 #include <media/TranscoderWrapper.h>
26 #include <media/TranscodingClientManager.h>
27 #include <media/TranscodingDefs.h>
28 #include <media/TranscodingLogger.h>
29 #include <media/TranscodingResourcePolicy.h>
30 #include <media/TranscodingSessionController.h>
31 #include <media/TranscodingThermalPolicy.h>
32 #include <media/TranscodingUidPolicy.h>
33 #include <utils/Log.h>
34 #include <utils/Vector.h>
35 
36 #include "SimulatedTranscoder.h"
37 
38 namespace android {
39 
40 // Convenience methods for constructing binder::Status objects for error returns
41 #define STATUS_ERROR_FMT(errorCode, errorString, ...) \
42     Status::fromServiceSpecificErrorWithMessage(      \
43             errorCode,                                \
44             String8::format("%s:%d: " errorString, __FUNCTION__, __LINE__, ##__VA_ARGS__))
45 
46 static constexpr int64_t kTranscoderHeartBeatIntervalUs = 1000000LL;
47 
MediaTranscodingService()48 MediaTranscodingService::MediaTranscodingService()
49       : mUidPolicy(new TranscodingUidPolicy()),
50         mResourcePolicy(new TranscodingResourcePolicy()),
51         mThermalPolicy(new TranscodingThermalPolicy()),
52         mLogger(new TranscodingLogger()) {
53     ALOGV("MediaTranscodingService is created");
54     bool simulated = property_get_bool("debug.transcoding.simulated_transcoder", false);
55     if (simulated) {
56         // Overrid default config params with shorter values for testing.
57         TranscodingSessionController::ControllerConfig config = {
58                 .pacerBurstThresholdMs = 500,
59                 .pacerBurstCountQuota = 10,
60                 .pacerBurstTimeQuotaSeconds = 3,
61         };
62         mSessionController.reset(new TranscodingSessionController(
63                 [](const std::shared_ptr<TranscoderCallbackInterface>& cb)
64                         -> std::shared_ptr<TranscoderInterface> {
65                     return std::make_shared<SimulatedTranscoder>(cb);
66                 },
67                 mUidPolicy, mResourcePolicy, mThermalPolicy, &config));
68     } else {
69         int32_t overrideBurstCountQuota =
70                 property_get_int32("persist.transcoding.burst_count_quota", -1);
71         int32_t pacerBurstTimeQuotaSeconds =
72                 property_get_int32("persist.transcoding.burst_time_quota_seconds", -1);
73         // Override default config params with properties if present.
74         TranscodingSessionController::ControllerConfig config;
75         if (overrideBurstCountQuota > 0) {
76             config.pacerBurstCountQuota = overrideBurstCountQuota;
77         }
78         if (pacerBurstTimeQuotaSeconds > 0) {
79             config.pacerBurstTimeQuotaSeconds = pacerBurstTimeQuotaSeconds;
80         }
81         mSessionController.reset(new TranscodingSessionController(
82                 [logger = mLogger](const std::shared_ptr<TranscoderCallbackInterface>& cb)
83                         -> std::shared_ptr<TranscoderInterface> {
84                     return std::make_shared<TranscoderWrapper>(cb, logger,
85                                                                kTranscoderHeartBeatIntervalUs);
86                 },
87                 mUidPolicy, mResourcePolicy, mThermalPolicy, &config));
88     }
89     mClientManager.reset(new TranscodingClientManager(mSessionController));
90     mUidPolicy->setCallback(mSessionController);
91     mResourcePolicy->setCallback(mSessionController);
92     mThermalPolicy->setCallback(mSessionController);
93 }
94 
~MediaTranscodingService()95 MediaTranscodingService::~MediaTranscodingService() {
96     ALOGE("Should not be in ~MediaTranscodingService");
97 }
98 
dump(int fd,const char **,uint32_t)99 binder_status_t MediaTranscodingService::dump(int fd, const char** /*args*/, uint32_t /*numArgs*/) {
100     String8 result;
101 
102     uid_t callingUid = AIBinder_getCallingUid();
103     pid_t callingPid = AIBinder_getCallingPid();
104     if (__builtin_available(android __TRANSCODING_MIN_API__, *)) {
105         int32_t permissionResult;
106         if (APermissionManager_checkPermission("android.permission.DUMP", callingPid, callingUid,
107                                                &permissionResult) != PERMISSION_MANAGER_STATUS_OK ||
108             permissionResult != PERMISSION_MANAGER_PERMISSION_GRANTED) {
109             result.format(
110                     "Permission Denial: "
111                     "can't dump MediaTranscodingService from pid=%d, uid=%d\n",
112                     AIBinder_getCallingPid(), AIBinder_getCallingUid());
113             write(fd, result.c_str(), result.size());
114             return PERMISSION_DENIED;
115         }
116     }
117 
118     const size_t SIZE = 256;
119     char buffer[SIZE];
120 
121     snprintf(buffer, SIZE, "MediaTranscodingService: %p\n", this);
122     result.append(buffer);
123     write(fd, result.c_str(), result.size());
124 
125     Vector<String16> args;
126     mClientManager->dumpAllClients(fd, args);
127     mSessionController->dumpAllSessions(fd, args);
128     return OK;
129 }
130 
131 //static
instantiate()132 void MediaTranscodingService::instantiate() {
133     std::shared_ptr<MediaTranscodingService> service =
134             ::ndk::SharedRefBase::make<MediaTranscodingService>();
135     if (__builtin_available(android __TRANSCODING_MIN_API__, *)) {
136         // Once service is started, we want it to stay even is client side perished.
137         AServiceManager_forceLazyServicesPersist(true /*persist*/);
138         (void)AServiceManager_registerLazyService(service->asBinder().get(), getServiceName());
139     }
140 }
141 
registerClient(const std::shared_ptr<ITranscodingClientCallback> & in_callback,const std::string & in_clientName,const std::string & in_opPackageName,std::shared_ptr<ITranscodingClient> * _aidl_return)142 Status MediaTranscodingService::registerClient(
143         const std::shared_ptr<ITranscodingClientCallback>& in_callback,
144         const std::string& in_clientName, const std::string& in_opPackageName,
145         std::shared_ptr<ITranscodingClient>* _aidl_return) {
146     if (in_callback == nullptr) {
147         *_aidl_return = nullptr;
148         return STATUS_ERROR_FMT(ERROR_ILLEGAL_ARGUMENT, "Client callback cannot be null!");
149     }
150 
151     // Creates the client and uses its process id as client id.
152     std::shared_ptr<ITranscodingClient> newClient;
153 
154     status_t err =
155             mClientManager->addClient(in_callback, in_clientName, in_opPackageName, &newClient);
156     if (err != OK) {
157         *_aidl_return = nullptr;
158         return STATUS_ERROR_FMT(err, "Failed to add client to TranscodingClientManager");
159     }
160 
161     *_aidl_return = newClient;
162     return Status::ok();
163 }
164 
getNumOfClients(int32_t * _aidl_return)165 Status MediaTranscodingService::getNumOfClients(int32_t* _aidl_return) {
166     ALOGD("MediaTranscodingService::getNumOfClients");
167     *_aidl_return = mClientManager->getNumOfClients();
168     return Status::ok();
169 }
170 
171 }  // namespace android
172