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/mkvparser.h"
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
32class MetaData;
33struct DataSourceReader;
34struct MatroskaSource;
35
36struct MatroskaExtractor : public MediaExtractor {
37    explicit MatroskaExtractor(const sp<DataSource> &source);
38
39    virtual size_t countTracks();
40
41    virtual sp<IMediaSource> getTrack(size_t index);
42
43    virtual sp<MetaData> getTrackMetaData(
44            size_t index, uint32_t flags);
45
46    virtual sp<MetaData> getMetaData();
47
48    virtual uint32_t flags() const;
49
50    virtual const char * name() { return "MatroskaExtractor"; }
51
52protected:
53    virtual ~MatroskaExtractor();
54
55private:
56    friend struct MatroskaSource;
57    friend struct BlockIterator;
58
59    struct TrackInfo {
60        unsigned long mTrackNum;
61        bool mEncrypted;
62        sp<MetaData> mMeta;
63        const MatroskaExtractor *mExtractor;
64        Vector<const mkvparser::CuePoint*> mCuePoints;
65
66        // mHeader points to memory managed by mkvparser;
67        // mHeader would be deleted when mSegment is deleted
68        // in ~MatroskaExtractor.
69        unsigned char *mHeader;
70        size_t mHeaderLen;
71
72        const mkvparser::Track* getTrack() const;
73        const mkvparser::CuePoint::TrackPosition *find(long long timeNs) const;
74    };
75
76    Mutex mLock;
77    Vector<TrackInfo> mTracks;
78
79    sp<DataSource> mDataSource;
80    DataSourceReader *mReader;
81    mkvparser::Segment *mSegment;
82    bool mExtractedThumbnails;
83    bool mIsLiveStreaming;
84    bool mIsWebm;
85    int64_t mSeekPreRollNs;
86
87    status_t synthesizeAVCC(TrackInfo *trackInfo, size_t index);
88    status_t initTrackInfo(const mkvparser::Track *track, const sp<MetaData> &meta, TrackInfo *trackInfo);
89    void addTracks();
90    void findThumbnails();
91    void getColorInformation(const mkvparser::VideoTrack *vtrack, sp<MetaData> &meta);
92    bool isLiveStreaming() const;
93
94    MatroskaExtractor(const MatroskaExtractor &);
95    MatroskaExtractor &operator=(const MatroskaExtractor &);
96};
97
98bool SniffMatroska(
99        const sp<DataSource> &source, String8 *mimeType, float *confidence,
100        sp<AMessage> *);
101
102}  // namespace android
103
104#endif  // MATROSKA_EXTRACTOR_H_
105