HTTPBase.h revision f580806d893c4631f5324ff0af5c2db68a40ef42 
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
26namespace android {
27
28struct 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
59protected:
60    virtual void addBandwidthMeasurement(size_t numBytes, int64_t delayUs);
61
62private:
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