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/DataSource.h>
22#include <media/stagefright/foundation/ABase.h>
23#include <media/stagefright/MediaErrors.h>
24#include <utils/List.h>
25#include <utils/threads.h>
26
27namespace android {
28
29struct HTTPBase : public DataSource {
30    enum Flags {
31        // Don't log any URLs.
32        kFlagIncognito = 1
33    };
34
35    HTTPBase();
36
37    virtual status_t connect(
38            const char *uri,
39            const KeyedVector<String8, String8> *headers = NULL,
40            off64_t offset = 0) = 0;
41
42    virtual void disconnect() = 0;
43
44    // Returns true if bandwidth could successfully be estimated,
45    // false otherwise.
46    virtual bool estimateBandwidth(int32_t *bandwidth_bps);
47
48    virtual status_t getEstimatedBandwidthKbps(int32_t *kbps);
49
50    virtual status_t setBandwidthStatCollectFreq(int32_t freqMs);
51
52    virtual void setBandwidthHistorySize(size_t numHistoryItems);
53
54    static void RegisterSocketUserTag(int sockfd, uid_t uid, uint32_t kTag);
55    static void UnRegisterSocketUserTag(int sockfd);
56
57    static void RegisterSocketUserMark(int sockfd, uid_t uid);
58    static void UnRegisterSocketUserMark(int sockfd);
59
60    virtual String8 toString() {
61        return mName;
62    }
63
64protected:
65    virtual void addBandwidthMeasurement(size_t numBytes, int64_t delayUs);
66    String8 mName;
67
68private:
69    struct BandwidthEntry {
70        int64_t mDelayUs;
71        size_t mNumBytes;
72    };
73
74    Mutex mLock;
75
76    List<BandwidthEntry> mBandwidthHistory;
77    size_t mNumBandwidthHistoryItems;
78    int64_t mTotalTransferTimeUs;
79    size_t mTotalTransferBytes;
80    size_t mMaxBandwidthHistoryItems;
81
82    enum {
83        kMinBandwidthCollectFreqMs = 1000,   // 1 second
84        kMaxBandwidthCollectFreqMs = 60000,  // one minute
85    };
86
87    int64_t mPrevBandwidthMeasureTimeUs;
88    int32_t mPrevEstimatedBandWidthKbps;
89    int32_t mBandWidthCollectFreqMs;
90
91    DISALLOW_EVIL_CONSTRUCTORS(HTTPBase);
92};
93
94}  // namespace android
95
96#endif  // HTTP_BASE_H_
97