MatroskaExtractor.h revision 2f46e8152fb881d3a1d7afd223f1ed51f6e358b8 
1/*
2 * Copyright (C) 2010 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 MATROSKA_EXTRACTOR_H_
18
19#define MATROSKA_EXTRACTOR_H_
20
21#include "mkvparser.hpp"
22
23#include <media/stagefright/MediaExtractor.h>
24#include <utils/Vector.h>
25#include <utils/threads.h>
26
27namespace android {
28
29struct AMessage;
30class String8;
31
32struct DataSourceReader;
33struct MatroskaSource;
34
35struct MatroskaExtractor : public MediaExtractor {
36    MatroskaExtractor(const sp<DataSource> &source);
37
38    virtual size_t countTracks();
39
40    virtual sp<MediaSource> getTrack(size_t index);
41
42    virtual sp<MetaData> getTrackMetaData(
43            size_t index, uint32_t flags);
44
45    virtual sp<MetaData> getMetaData();
46
47    virtual uint32_t flags() const;
48
49protected:
50    virtual ~MatroskaExtractor();
51
52private:
53    friend struct MatroskaSource;
54    friend struct BlockIterator;
55
56    struct TrackInfo {
57        unsigned long mTrackNum;
58        sp<MetaData> mMeta;
59        const MatroskaExtractor *mExtractor;
60        Vector<const mkvparser::CuePoint*> mCuePoints;
61
62        const mkvparser::Track* getTrack() const;
63        const mkvparser::CuePoint::TrackPosition *find(long long timeNs) const;
64    };
65
66    Mutex mLock;
67    Vector<TrackInfo> mTracks;
68
69    sp<DataSource> mDataSource;
70    DataSourceReader *mReader;
71    mkvparser::Segment *mSegment;
72    bool mExtractedThumbnails;
73    bool mIsLiveStreaming;
74    bool mIsWebm;
75    int64_t mSeekPreRollNs;
76
77    void addTracks();
78    void findThumbnails();
79
80    bool isLiveStreaming() const;
81
82    MatroskaExtractor(const MatroskaExtractor &);
83    MatroskaExtractor &operator=(const MatroskaExtractor &);
84};
85
86bool SniffMatroska(
87        const sp<DataSource> &source, String8 *mimeType, float *confidence,
88        sp<AMessage> *);
89
90}  // namespace android
91
92#endif  // MATROSKA_EXTRACTOR_H_
93