1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/*
**
** Copyright 2008, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
//#define LOG_NDEBUG 0
#define LOG_TAG "MediaMetadataRetriever"
#include <binder/IServiceManager.h>
#include <binder/IPCThreadState.h>
#include <media/mediametadataretriever.h>
#include <media/IMediaPlayerService.h>
#include <utils/Log.h>
#include <dlfcn.h>
namespace android {
// client singleton for binder interface to service
Mutex MediaMetadataRetriever::sServiceLock;
sp<IMediaPlayerService> MediaMetadataRetriever::sService;
sp<MediaMetadataRetriever::DeathNotifier> MediaMetadataRetriever::sDeathNotifier;
const sp<IMediaPlayerService>& MediaMetadataRetriever::getService()
{
Mutex::Autolock lock(sServiceLock);
if (sService.get() == 0) {
sp<IServiceManager> sm = defaultServiceManager();
sp<IBinder> binder;
do {
binder = sm->getService(String16("media.player"));
if (binder != 0) {
break;
}
LOGW("MediaPlayerService not published, waiting...");
usleep(500000); // 0.5 s
} while(true);
if (sDeathNotifier == NULL) {
sDeathNotifier = new DeathNotifier();
}
binder->linkToDeath(sDeathNotifier);
sService = interface_cast<IMediaPlayerService>(binder);
}
LOGE_IF(sService == 0, "no MediaPlayerService!?");
return sService;
}
MediaMetadataRetriever::MediaMetadataRetriever()
{
LOGV("constructor");
const sp<IMediaPlayerService>& service(getService());
if (service == 0) {
LOGE("failed to obtain MediaMetadataRetrieverService");
return;
}
sp<IMediaMetadataRetriever> retriever(service->createMetadataRetriever(getpid()));
if (retriever == 0) {
LOGE("failed to create IMediaMetadataRetriever object from server");
}
mRetriever = retriever;
}
MediaMetadataRetriever::~MediaMetadataRetriever()
{
LOGV("destructor");
disconnect();
IPCThreadState::self()->flushCommands();
}
void MediaMetadataRetriever::disconnect()
{
LOGV("disconnect");
sp<IMediaMetadataRetriever> retriever;
{
Mutex::Autolock _l(mLock);
retriever = mRetriever;
mRetriever.clear();
}
if (retriever != 0) {
retriever->disconnect();
}
}
status_t MediaMetadataRetriever::setDataSource(
const char *srcUrl, const KeyedVector<String8, String8> *headers)
{
LOGV("setDataSource");
Mutex::Autolock _l(mLock);
if (mRetriever == 0) {
LOGE("retriever is not initialized");
return INVALID_OPERATION;
}
if (srcUrl == NULL) {
LOGE("data source is a null pointer");
return UNKNOWN_ERROR;
}
LOGV("data source (%s)", srcUrl);
return mRetriever->setDataSource(srcUrl, headers);
}
status_t MediaMetadataRetriever::setDataSource(int fd, int64_t offset, int64_t length)
{
LOGV("setDataSource(%d, %lld, %lld)", fd, offset, length);
Mutex::Autolock _l(mLock);
if (mRetriever == 0) {
LOGE("retriever is not initialized");
return INVALID_OPERATION;
}
if (fd < 0 || offset < 0 || length < 0) {
LOGE("Invalid negative argument");
return UNKNOWN_ERROR;
}
return mRetriever->setDataSource(fd, offset, length);
}
sp<IMemory> MediaMetadataRetriever::getFrameAtTime(int64_t timeUs, int option)
{
LOGV("getFrameAtTime: time(%lld us) option(%d)", timeUs, option);
Mutex::Autolock _l(mLock);
if (mRetriever == 0) {
LOGE("retriever is not initialized");
return NULL;
}
return mRetriever->getFrameAtTime(timeUs, option);
}
const char* MediaMetadataRetriever::extractMetadata(int keyCode)
{
LOGV("extractMetadata(%d)", keyCode);
Mutex::Autolock _l(mLock);
if (mRetriever == 0) {
LOGE("retriever is not initialized");
return NULL;
}
return mRetriever->extractMetadata(keyCode);
}
sp<IMemory> MediaMetadataRetriever::extractAlbumArt()
{
LOGV("extractAlbumArt");
Mutex::Autolock _l(mLock);
if (mRetriever == 0) {
LOGE("retriever is not initialized");
return NULL;
}
return mRetriever->extractAlbumArt();
}
void MediaMetadataRetriever::DeathNotifier::binderDied(const wp<IBinder>& who) {
Mutex::Autolock lock(MediaMetadataRetriever::sServiceLock);
MediaMetadataRetriever::sService.clear();
LOGW("MediaMetadataRetriever server died!");
}
MediaMetadataRetriever::DeathNotifier::~DeathNotifier()
{
Mutex::Autolock lock(sServiceLock);
if (sService != 0) {
sService->asBinder()->unlinkToDeath(this);
}
}
}; // namespace android
|
