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 <arpa/inet.h> 22 23 #include <media/stagefright/DataSource.h> 24 #include <media/stagefright/MediaExtractor.h> 25 #include <media/stagefright/Utils.h> 26 #include <utils/List.h> 27 #include <utils/Vector.h> 28 #include <utils/String8.h> 29 30 namespace android { 31 32 struct AMessage; 33 class DataSource; 34 class SampleTable; 35 class String8; 36 37 struct SidxEntry { 38 size_t mSize; 39 uint32_t mDurationUs; 40 }; 41 42 class MPEG4Extractor : public MediaExtractor { 43 public: 44 // Extractor assumes ownership of "source". 45 MPEG4Extractor(const sp<DataSource> &source); 46 47 virtual size_t countTracks(); 48 virtual sp<MediaSource> getTrack(size_t index); 49 virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags); 50 51 virtual sp<MetaData> getMetaData(); 52 virtual uint32_t flags() const; 53 54 // for DRM 55 virtual char* getDrmTrackInfo(size_t trackID, int *len); 56 57 protected: 58 virtual ~MPEG4Extractor(); 59 60 private: 61 62 struct PsshInfo { 63 uint8_t uuid[16]; 64 uint32_t datalen; 65 uint8_t *data; 66 }; 67 struct Track { 68 Track *next; 69 sp<MetaData> meta; 70 uint32_t timescale; 71 sp<SampleTable> sampleTable; 72 bool includes_expensive_metadata; 73 bool skipTrack; 74 }; 75 76 Vector<SidxEntry> mSidxEntries; 77 uint64_t mSidxDuration; 78 off64_t mMoofOffset; 79 80 Vector<PsshInfo> mPssh; 81 82 sp<DataSource> mDataSource; 83 status_t mInitCheck; 84 bool mHasVideo; 85 86 Track *mFirstTrack, *mLastTrack; 87 88 sp<MetaData> mFileMetaData; 89 90 Vector<uint32_t> mPath; 91 String8 mLastCommentMean; 92 String8 mLastCommentName; 93 String8 mLastCommentData; 94 95 status_t readMetaData(); 96 status_t parseChunk(off64_t *offset, int depth); 97 status_t parseMetaData(off64_t offset, size_t size); 98 99 status_t updateAudioTrackInfoFromESDS_MPEG4Audio( 100 const void *esds_data, size_t esds_size); 101 102 static status_t verifyTrack(Track *track); 103 104 struct SINF { 105 SINF *next; 106 uint16_t trackID; 107 uint8_t IPMPDescriptorID; 108 ssize_t len; 109 char *IPMPData; 110 }; 111 112 SINF *mFirstSINF; 113 114 bool mIsDrm; 115 status_t parseDrmSINF(off64_t *offset, off64_t data_offset); 116 117 status_t parseTrackHeader(off64_t data_offset, off64_t data_size); 118 119 status_t parseSegmentIndex(off64_t data_offset, size_t data_size); 120 121 Track *findTrackByMimePrefix(const char *mimePrefix); 122 123 MPEG4Extractor(const MPEG4Extractor &); 124 MPEG4Extractor &operator=(const MPEG4Extractor &); 125 }; 126 127 bool SniffMPEG4( 128 const sp<DataSource> &source, String8 *mimeType, float *confidence, 129 sp<AMessage> *); 130 131 } // namespace android 132 133 #endif // MPEG4_EXTRACTOR_H_ 134