1 /*
2  * Copyright (C) 2011 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 #ifndef HTTP_BASE_H_
18 
19 #define HTTP_BASE_H_
20 
21 #include <media/stagefright/foundation/ABase.h>
22 #include <media/stagefright/DataSource.h>
23 #include <media/stagefright/MediaErrors.h>
24 #include <utils/threads.h>
25 
26 namespace android {
27 
28 struct HTTPBase : public DataSource {
29     enum Flags {
30         // Don't log any URLs.
31         kFlagIncognito = 1
32     };
33 
34     HTTPBase();
35 
36     virtual status_t connect(
37             const char *uri,
38             const KeyedVector<String8, String8> *headers = NULL,
39             off64_t offset = 0) = 0;
40 
41     virtual void disconnect() = 0;
42 
43     // Returns true if bandwidth could successfully be estimated,
44     // false otherwise.
45     virtual bool estimateBandwidth(int32_t *bandwidth_bps);
46 
47     virtual status_t getEstimatedBandwidthKbps(int32_t *kbps);
48 
49     virtual status_t setBandwidthStatCollectFreq(int32_t freqMs);
50 
51     virtual void setBandwidthHistorySize(size_t numHistoryItems);
52 
53     static void RegisterSocketUserTag(int sockfd, uid_t uid, uint32_t kTag);
54     static void UnRegisterSocketUserTag(int sockfd);
55 
56     static void RegisterSocketUserMark(int sockfd, uid_t uid);
57     static void UnRegisterSocketUserMark(int sockfd);
58 
59 protected:
60     virtual void addBandwidthMeasurement(size_t numBytes, int64_t delayUs);
61 
62 private:
63     struct BandwidthEntry {
64         int64_t mDelayUs;
65         size_t mNumBytes;
66     };
67 
68     Mutex mLock;
69 
70     List<BandwidthEntry> mBandwidthHistory;
71     size_t mNumBandwidthHistoryItems;
72     int64_t mTotalTransferTimeUs;
73     size_t mTotalTransferBytes;
74     size_t mMaxBandwidthHistoryItems;
75 
76     enum {
77         kMinBandwidthCollectFreqMs = 1000,   // 1 second
78         kMaxBandwidthCollectFreqMs = 60000,  // one minute
79     };
80 
81     int64_t mPrevBandwidthMeasureTimeUs;
82     int32_t mPrevEstimatedBandWidthKbps;
83     int32_t mBandWidthCollectFreqMs;
84 
85     DISALLOW_EVIL_CONSTRUCTORS(HTTPBase);
86 };
87 
88 }  // namespace android
89 
90 #endif  // HTTP_BASE_H_
91