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/stagefright/MediaExtractor.h> 23 #include <utils/threads.h> 24 #include <utils/KeyedVector.h> 25 26 namespace android { 27 28 struct ABuffer; 29 struct AMessage; 30 struct Track; 31 struct String8; 32 33 struct MPEG2PSExtractor : public MediaExtractor { 34 MPEG2PSExtractor(const sp<DataSource> &source); 35 36 virtual size_t countTracks(); 37 virtual sp<MediaSource> getTrack(size_t index); 38 virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags); 39 40 virtual sp<MetaData> getMetaData(); 41 42 virtual uint32_t flags() const; 43 44 protected: 45 virtual ~MPEG2PSExtractor(); 46 47 private: 48 struct Track; 49 struct WrappedTrack; 50 51 mutable Mutex mLock; 52 sp<DataSource> mDataSource; 53 54 off64_t mOffset; 55 status_t mFinalResult; 56 sp<ABuffer> mBuffer; 57 KeyedVector<unsigned, sp<Track> > mTracks; 58 bool mScanning; 59 60 bool mProgramStreamMapValid; 61 KeyedVector<unsigned, unsigned> mStreamTypeByESID; 62 63 status_t feedMore(); 64 65 status_t dequeueChunk(); 66 ssize_t dequeuePack(); 67 ssize_t dequeueSystemHeader(); 68 ssize_t dequeuePES(); 69 70 DISALLOW_EVIL_CONSTRUCTORS(MPEG2PSExtractor); 71 }; 72 73 bool SniffMPEG2PS( 74 const sp<DataSource> &source, String8 *mimeType, float *confidence, 75 sp<AMessage> *); 76 77 } // namespace android 78 79 #endif // MPEG2_PS_EXTRACTOR_H_ 80 81