MPEG4Extractor.h revision 693d271e62a3726689ff68f4505ba49228eb94b2
1/* 2 * Copyright (C) 2009 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 MPEG4_EXTRACTOR_H_ 18 19#define MPEG4_EXTRACTOR_H_ 20 21#include <media/stagefright/MediaExtractor.h> 22 23namespace android { 24 25class DataSource; 26class SampleTable; 27class String8; 28 29class MPEG4Extractor : public MediaExtractor { 30public: 31 // Extractor assumes ownership of "source". 32 MPEG4Extractor(const sp<DataSource> &source); 33 34 size_t countTracks(); 35 sp<MediaSource> getTrack(size_t index); 36 sp<MetaData> getTrackMetaData(size_t index); 37 38protected: 39 virtual ~MPEG4Extractor(); 40 41private: 42 struct Track { 43 Track *next; 44 sp<MetaData> meta; 45 uint32_t timescale; 46 sp<SampleTable> sampleTable; 47 }; 48 49 sp<DataSource> mDataSource; 50 bool mHaveMetadata; 51 52 Track *mFirstTrack, *mLastTrack; 53 54 uint32_t mHandlerType; 55 56 status_t readMetaData(); 57 status_t parseChunk(off_t *offset, int depth); 58 59 MPEG4Extractor(const MPEG4Extractor &); 60 MPEG4Extractor &operator=(const MPEG4Extractor &); 61}; 62 63bool SniffMPEG4( 64 const sp<DataSource> &source, String8 *mimeType, float *confidence); 65 66} // namespace android 67 68#endif // MPEG4_EXTRACTOR_H_ 69