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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 MPEG2_TS_EXTRACTOR_H_
     18 
     19 #define MPEG2_TS_EXTRACTOR_H_
     20 
     21 #include <media/stagefright/foundation/ABase.h>
     22 #include <media/stagefright/MediaExtractor.h>
     23 #include <media/stagefright/MediaSource.h>
     24 #include <utils/threads.h>
     25 #include <utils/KeyedVector.h>
     26 #include <utils/Vector.h>
     27 
     28 namespace android {
     29 
     30 struct AMessage;
     31 struct AnotherPacketSource;
     32 struct ATSParser;
     33 class DataSource;
     34 struct MPEG2TSSource;
     35 class String8;
     36 
     37 struct MPEG2TSExtractor : public MediaExtractor {
     38     MPEG2TSExtractor(const sp<DataSource> &source);
     39 
     40     virtual size_t countTracks();
     41     virtual sp<MediaSource> getTrack(size_t index);
     42     virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags);
     43 
     44     virtual sp<MetaData> getMetaData();
     45 
     46     virtual uint32_t flags() const;
     47 
     48 private:
     49     friend struct MPEG2TSSource;
     50 
     51     mutable Mutex mLock;
     52 
     53     sp<DataSource> mDataSource;
     54 
     55     sp<ATSParser> mParser;
     56 
     57     Vector<sp<AnotherPacketSource> > mSourceImpls;
     58 
     59     Vector<KeyedVector<int64_t, off64_t> > mSyncPoints;
     60     // Sync points used for seeking --- normally one for video track is used.
     61     // If no video track is present, audio track will be used instead.
     62     KeyedVector<int64_t, off64_t> *mSeekSyncPoints;
     63 
     64     off64_t mOffset;
     65 
     66     void init();
     67     status_t feedMore();
     68     status_t seek(int64_t seekTimeUs,
     69             const MediaSource::ReadOptions::SeekMode& seekMode);
     70     status_t queueDiscontinuityForSeek(int64_t actualSeekTimeUs);
     71     status_t seekBeyond(int64_t seekTimeUs);
     72 
     73     status_t feedUntilBufferAvailable(const sp<AnotherPacketSource> &impl);
     74 
     75     DISALLOW_EVIL_CONSTRUCTORS(MPEG2TSExtractor);
     76 };
     77 
     78 bool SniffMPEG2TS(
     79         const sp<DataSource> &source, String8 *mimeType, float *confidence,
     80         sp<AMessage> *);
     81 
     82 }  // namespace android
     83 
     84 #endif  // MPEG2_TS_EXTRACTOR_H_
     85