ChromiumHTTPDataSource.h revision 6511c9755c3a3360ba869772600c7aae048a7ffc 
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 CHROME_HTTP_DATA_SOURCE_H_
18
19#define CHROME_HTTP_DATA_SOURCE_H_
20
21#include <media/stagefright/foundation/AString.h>
22#include <utils/threads.h>
23
24#include "HTTPBase.h"
25
26namespace android {
27
28struct SfDelegate;
29
30struct ChromiumHTTPDataSource : public HTTPBase {
31    ChromiumHTTPDataSource(uint32_t flags = 0);
32
33    virtual status_t connect(
34            const char *uri,
35            const KeyedVector<String8, String8> *headers = NULL,
36            off64_t offset = 0);
37
38    virtual void disconnect();
39
40    virtual status_t initCheck() const;
41
42    virtual ssize_t readAt(off64_t offset, void *data, size_t size);
43    virtual status_t getSize(off64_t *size);
44    virtual uint32_t flags();
45
46    virtual bool estimateBandwidth(int32_t *bandwidth_bps);
47
48    virtual sp<DecryptHandle> DrmInitialization();
49
50    virtual void getDrmInfo(sp<DecryptHandle> &handle, DrmManagerClient **client);
51
52    virtual String8 getUri();
53
54    virtual String8 getMIMEType() const;
55
56protected:
57    virtual ~ChromiumHTTPDataSource();
58
59private:
60    friend struct SfDelegate;
61
62    enum State {
63        DISCONNECTED,
64        CONNECTING,
65        CONNECTED,
66        READING,
67        DISCONNECTING
68    };
69
70    struct BandwidthEntry {
71        int64_t mDelayUs;
72        size_t mNumBytes;
73    };
74
75    const uint32_t mFlags;
76
77    mutable Mutex mLock;
78    Condition mCondition;
79
80    State mState;
81
82    SfDelegate *mDelegate;
83
84    AString mURI;
85    KeyedVector<String8, String8> mHeaders;
86
87    off64_t mCurrentOffset;
88
89    // Any connection error or the result of a read operation
90    // (for the lattter this is the number of bytes read, if successful).
91    ssize_t mIOResult;
92
93    int64_t mContentSize;
94
95    String8 mContentType;
96
97    List<BandwidthEntry> mBandwidthHistory;
98    size_t mNumBandwidthHistoryItems;
99    int64_t mTotalTransferTimeUs;
100    size_t mTotalTransferBytes;
101
102    sp<DecryptHandle> mDecryptHandle;
103    DrmManagerClient *mDrmManagerClient;
104
105    void disconnect_l();
106
107    status_t connect_l(
108            const char *uri,
109            const KeyedVector<String8, String8> *headers,
110            off64_t offset);
111
112    static void InitiateRead(
113            ChromiumHTTPDataSource *me, void *data, size_t size);
114
115    void initiateRead(void *data, size_t size);
116
117    void onConnectionEstablished(
118            int64_t contentSize, const char *contentType);
119
120    void onConnectionFailed(status_t err);
121    void onReadCompleted(ssize_t size);
122    void onDisconnectComplete();
123
124    void addBandwidthMeasurement_l(size_t numBytes, int64_t delayUs);
125
126    void clearDRMState_l();
127
128    DISALLOW_EVIL_CONSTRUCTORS(ChromiumHTTPDataSource);
129};
130
131}  // namespace android
132
133#endif  // CHROME_HTTP_DATA_SOURCE_H_
134