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