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");
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 return MediaAnalyticsItem::SessionIDInvalid;
98 }
99
100 // get an answer out of 'reply'
101 int64_t sessionid = reply.readInt64();
102 if (DEBUGGING_RETURNS) {
103 ALOGD("the caller gets sessionid=%" PRId64 "", sessionid);
104 }
105 return sessionid;
106 }
107
108 };
109
110 IMPLEMENT_META_INTERFACE(MediaAnalyticsService, "android.media.IMediaAnalyticsService");
111
112 // ----------------------------------------------------------------------
113
onTransact(uint32_t code,const Parcel & data,Parcel * reply,uint32_t flags)114 status_t BnMediaAnalyticsService::onTransact(
115 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
116 {
117
118
119 // get calling pid/tid
120 IPCThreadState *ipc = IPCThreadState::self();
121 int clientPid = ipc->getCallingPid();
122 // permission checking
123
124 if(DEBUGGING_FLOW) {
125 ALOGD("running in service, code %d, pid %d; called from pid %d",
126 code, getpid(), clientPid);
127 }
128
129 switch (code) {
130
131 case GENERATE_UNIQUE_SESSIONID: {
132 CHECK_INTERFACE(IMediaAnalyticsService, data, reply);
133
134 MediaAnalyticsItem::SessionID_t sessionid = generateUniqueSessionID();
135 reply->writeInt64(sessionid);
136
137 return NO_ERROR;
138 } break;
139
140 case SUBMIT_ITEM: {
141 CHECK_INTERFACE(IMediaAnalyticsService, data, reply);
142
143 bool forcenew;
144 MediaAnalyticsItem *item = new MediaAnalyticsItem;
145
146 data.readBool(&forcenew);
147 item->readFromParcel(data);
148
149 item->setPid(clientPid);
150
151 // submit() takes over ownership of 'item'
152 MediaAnalyticsItem::SessionID_t sessionid = submit(item, forcenew);
153 reply->writeInt64(sessionid);
154
155 return NO_ERROR;
156 } break;
157
158 default:
159 return BBinder::onTransact(code, data, reply, flags);
160 }
161 }
162
163 // ----------------------------------------------------------------------------
164
165 } // namespace android
166