1 /*
2 * Copyright (C) 2016 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 "MediaAnalytics"
18
19 #include <stdint.h>
20 #include <inttypes.h>
21 #include <sys/types.h>
22
23 #include <binder/Parcel.h>
24 #include <binder/IMemory.h>
25 #include <binder/IPCThreadState.h>
26
27 #include <utils/Errors.h> // for status_t
28 #include <utils/List.h>
29 #include <utils/Log.h>
30 #include <utils/String8.h>
31
32 #include <media/MediaAnalyticsItem.h>
33 #include <media/IMediaAnalyticsService.h>
34
35 #define DEBUGGING 0
36 #define DEBUGGING_FLOW 0
37 #define DEBUGGING_RETURNS 0
38
39 namespace android {
40
41 enum {
42 GENERATE_UNIQUE_SESSIONID = IBinder::FIRST_CALL_TRANSACTION,
43 SUBMIT_ITEM,
44 };
45
46 class BpMediaAnalyticsService: public BpInterface<IMediaAnalyticsService>
47 {
48 public:
BpMediaAnalyticsService(const sp<IBinder> & impl)49 explicit BpMediaAnalyticsService(const sp<IBinder>& impl)
50 : BpInterface<IMediaAnalyticsService>(impl)
51 {
52 }
53
generateUniqueSessionID()54 virtual MediaAnalyticsItem::SessionID_t generateUniqueSessionID() {
55 Parcel data, reply;
56 status_t err;
57 MediaAnalyticsItem::SessionID_t sessionid =
58 MediaAnalyticsItem::SessionIDInvalid;
59
60 data.writeInterfaceToken(IMediaAnalyticsService::getInterfaceDescriptor());
61 err = remote()->transact(GENERATE_UNIQUE_SESSIONID, data, &reply);
62 if (err != NO_ERROR) {
63 ALOGW("bad response from service for generateSessionId, err=%d", err);
64 return MediaAnalyticsItem::SessionIDInvalid;
65 }
66 sessionid = reply.readInt64();
67 if (DEBUGGING_RETURNS) {
68 ALOGD("the caller gets a sessionid of %" PRId64 " back", sessionid);
69 }
70 return sessionid;
71 }
72
submit(MediaAnalyticsItem * item,bool forcenew)73 virtual MediaAnalyticsItem::SessionID_t submit(MediaAnalyticsItem *item, bool forcenew)
74 {
75 // have this record submit itself
76 // this will be a binder call with appropriate timing
77 // return value is the uuid that the system generated for it.
78 // the return value 0 and -1 are reserved.
79 // -1 to indicate that there was a problem recording...
80
81 Parcel data, reply;
82 status_t err;
83
84 if (item == NULL) {
85 return MediaAnalyticsItem::SessionIDInvalid;
86 }
87
88 data.writeInterfaceToken(IMediaAnalyticsService::getInterfaceDescriptor());
89 if(DEBUGGING_FLOW) {
90 ALOGD("client offers record: %s", item->toString().c_str());
91 }
92 data.writeBool(forcenew);
93 item->writeToParcel(&data);
94
95 err = remote()->transact(SUBMIT_ITEM, data, &reply);
96 if (err != NO_ERROR) {
97 ALOGW("bad response from service for submit, err=%d", err);
98 return MediaAnalyticsItem::SessionIDInvalid;
99 }
100
101 // get an answer out of 'reply'
102 int64_t sessionid = reply.readInt64();
103 if (DEBUGGING_RETURNS) {
104 ALOGD("the caller gets sessionid=%" PRId64 "", sessionid);
105 }
106 return sessionid;
107 }
108
109 };
110
111 IMPLEMENT_META_INTERFACE(MediaAnalyticsService, "android.media.IMediaAnalyticsService");
112
113 // ----------------------------------------------------------------------
114
onTransact(uint32_t code,const Parcel & data,Parcel * reply,uint32_t flags)115 status_t BnMediaAnalyticsService::onTransact(
116 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
117 {
118
119
120 // get calling pid/tid
121 IPCThreadState *ipc = IPCThreadState::self();
122 int clientPid = ipc->getCallingPid();
123 // permission checking
124
125 if(DEBUGGING_FLOW) {
126 ALOGD("running in service, code %d, pid %d; called from pid %d",
127 code, getpid(), clientPid);
128 }
129
130 switch (code) {
131
132 case GENERATE_UNIQUE_SESSIONID: {
133 CHECK_INTERFACE(IMediaAnalyticsService, data, reply);
134
135 MediaAnalyticsItem::SessionID_t sessionid = generateUniqueSessionID();
136 reply->writeInt64(sessionid);
137
138 return NO_ERROR;
139 } break;
140
141 case SUBMIT_ITEM: {
142 CHECK_INTERFACE(IMediaAnalyticsService, data, reply);
143
144 bool forcenew;
145 MediaAnalyticsItem *item = MediaAnalyticsItem::create();
146
147 data.readBool(&forcenew);
148 item->readFromParcel(data);
149
150 item->setPid(clientPid);
151
152 // submit() takes over ownership of 'item'
153 MediaAnalyticsItem::SessionID_t sessionid = submit(item, forcenew);
154 reply->writeInt64(sessionid);
155
156 return NO_ERROR;
157 } break;
158
159 default:
160 return BBinder::onTransact(code, data, reply, flags);
161 }
162 }
163
164 // ----------------------------------------------------------------------------
165
166 } // namespace android
167