blob: 673268b2ac55818b99dab1a28f4617ecf8b96320 (
plain)
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
|
/*
* Copyright (C) 2010 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.
*/
#ifndef THROTTLED_SOURCE_H_
#define THROTTLED_SOURCE_H_
#include <media/stagefright/DataSource.h>
#include <utils/threads.h>
namespace android {
struct ThrottledSource : public DataSource {
ThrottledSource(
const sp<DataSource> &source,
int32_t bandwidthLimitBytesPerSecond);
// implementation of readAt() that sleeps to achieve the desired max throughput
virtual ssize_t readAt(off64_t offset, void *data, size_t size);
// returns an empty string to prevent callers from using the Uri to construct a new datasource
virtual String8 getUri() {
return String8();
}
// following methods all call through to the wrapped DataSource's methods
status_t initCheck() const {
return mSource->initCheck();
}
virtual status_t getSize(off64_t *size) {
return mSource->getSize(size);
}
virtual uint32_t flags() {
return mSource->flags();
}
virtual status_t reconnectAtOffset(off64_t offset) {
return mSource->reconnectAtOffset(offset);
}
virtual sp<DecryptHandle> DrmInitialization(const char *mime = NULL) {
return mSource->DrmInitialization(mime);
}
virtual void getDrmInfo(sp<DecryptHandle> &handle, DrmManagerClient **client) {
mSource->getDrmInfo(handle, client);
};
virtual String8 getMIMEType() const {
return mSource->getMIMEType();
}
private:
Mutex mLock;
sp<DataSource> mSource;
int32_t mBandwidthLimitBytesPerSecond;
int64_t mStartTimeUs;
size_t mTotalTransferred;
ThrottledSource(const ThrottledSource &);
ThrottledSource &operator=(const ThrottledSource &);
};
} // namespace android
#endif // THROTTLED_SOURCE_H_
|