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 MPEG2_PS_EXTRACTOR_H_ 18 19 #define MPEG2_PS_EXTRACTOR_H_ 20 21 #include <media/stagefright/foundation/ABase.h> 22 #include <media/MediaExtractor.h> 23 #include <media/stagefright/MetaDataBase.h> 24 #include <utils/threads.h> 25 #include <utils/KeyedVector.h> 26 27 namespace android { 28 29 struct ABuffer; 30 struct AMessage; 31 struct Track; 32 class String8; 33 34 struct MPEG2PSExtractor : public MediaExtractor { 35 explicit MPEG2PSExtractor(DataSourceBase *source); 36 37 virtual size_t countTracks(); 38 virtual MediaTrack *getTrack(size_t index); 39 virtual status_t getTrackMetaData(MetaDataBase& meta, size_t index, uint32_t flags); 40 41 virtual status_t getMetaData(MetaDataBase& meta); 42 43 virtual uint32_t flags() const; nameMPEG2PSExtractor44 virtual const char * name() { return "MPEG2PSExtractor"; } 45 46 protected: 47 virtual ~MPEG2PSExtractor(); 48 49 private: 50 struct Track; 51 struct WrappedTrack; 52 53 mutable Mutex mLock; 54 DataSourceBase *mDataSource; 55 56 off64_t mOffset; 57 status_t mFinalResult; 58 sp<ABuffer> mBuffer; 59 KeyedVector<unsigned, sp<Track> > mTracks; 60 bool mScanning; 61 62 bool mProgramStreamMapValid; 63 KeyedVector<unsigned, unsigned> mStreamTypeByESID; 64 65 status_t feedMore(); 66 67 status_t dequeueChunk(); 68 ssize_t dequeuePack(); 69 ssize_t dequeueSystemHeader(); 70 ssize_t dequeuePES(); 71 72 DISALLOW_EVIL_CONSTRUCTORS(MPEG2PSExtractor); 73 }; 74 75 bool SniffMPEG2PS(DataSourceBase *source, float *confidence); 76 77 } // namespace android 78 79 #endif // MPEG2_PS_EXTRACTOR_H_ 80 81