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/DataSourceBase.h> 24 #include <media/MediaExtractor.h> 25 #include <media/stagefright/MetaDataBase.h> 26 #include <media/stagefright/foundation/AString.h> 27 #include <utils/KeyedVector.h> 28 #include <utils/List.h> 29 #include <utils/String8.h> 30 #include <utils/Vector.h> 31 32 namespace android { 33 struct AMessage; 34 class DataSourceBase; 35 struct CachedRangedDataSource; 36 class SampleTable; 37 class String8; 38 namespace heif { 39 class ItemTable; 40 } 41 using heif::ItemTable; 42 43 struct SidxEntry { 44 size_t mSize; 45 uint32_t mDurationUs; 46 }; 47 48 struct Trex { 49 uint32_t track_ID; 50 uint32_t default_sample_description_index; 51 uint32_t default_sample_duration; 52 uint32_t default_sample_size; 53 uint32_t default_sample_flags; 54 }; 55 56 class MPEG4Extractor : public MediaExtractor { 57 public: 58 explicit MPEG4Extractor(DataSourceBase *source, const char *mime = NULL); 59 60 virtual size_t countTracks(); 61 virtual MediaTrack *getTrack(size_t index); 62 virtual status_t getTrackMetaData(MetaDataBase& meta, size_t index, uint32_t flags); 63 64 virtual status_t getMetaData(MetaDataBase& meta); 65 virtual uint32_t flags() const; name()66 virtual const char * name() { return "MPEG4Extractor"; } 67 68 protected: 69 virtual ~MPEG4Extractor(); 70 71 private: 72 73 struct PsshInfo { 74 uint8_t uuid[16]; 75 uint32_t datalen; 76 uint8_t *data; 77 }; 78 struct Track { 79 Track *next; 80 MetaDataBase meta; 81 uint32_t timescale; 82 sp<SampleTable> sampleTable; 83 bool includes_expensive_metadata; 84 bool skipTrack; 85 bool has_elst; 86 int64_t elst_media_time; 87 uint64_t elst_segment_duration; 88 bool subsample_encryption; 89 }; 90 91 Vector<SidxEntry> mSidxEntries; 92 off64_t mMoofOffset; 93 bool mMoofFound; 94 bool mMdatFound; 95 96 Vector<PsshInfo> mPssh; 97 98 Vector<Trex> mTrex; 99 100 DataSourceBase *mDataSource; 101 CachedRangedDataSource *mCachedSource; 102 status_t mInitCheck; 103 uint32_t mHeaderTimescale; 104 bool mIsQT; 105 bool mIsHeif; 106 bool mHasMoovBox; 107 bool mPreferHeif; 108 109 Track *mFirstTrack, *mLastTrack; 110 111 MetaDataBase mFileMetaData; 112 113 Vector<uint32_t> mPath; 114 String8 mLastCommentMean; 115 String8 mLastCommentName; 116 String8 mLastCommentData; 117 118 KeyedVector<uint32_t, AString> mMetaKeyMap; 119 120 status_t readMetaData(); 121 status_t parseChunk(off64_t *offset, int depth); 122 status_t parseITunesMetaData(off64_t offset, size_t size); 123 status_t parseColorInfo(off64_t offset, size_t size); 124 status_t parse3GPPMetaData(off64_t offset, size_t size, int depth); 125 void parseID3v2MetaData(off64_t offset); 126 status_t parseQTMetaKey(off64_t data_offset, size_t data_size); 127 status_t parseQTMetaVal(int32_t keyId, off64_t data_offset, size_t data_size); 128 129 status_t updateAudioTrackInfoFromESDS_MPEG4Audio( 130 const void *esds_data, size_t esds_size); 131 132 static status_t verifyTrack(Track *track); 133 134 sp<ItemTable> mItemTable; 135 136 status_t parseTrackHeader(off64_t data_offset, off64_t data_size); 137 138 status_t parseSegmentIndex(off64_t data_offset, size_t data_size); 139 140 Track *findTrackByMimePrefix(const char *mimePrefix); 141 142 status_t parseAC3SampleEntry(off64_t offset); 143 status_t parseAC3SpecificBox(off64_t offset, uint16_t sampleRate); 144 145 MPEG4Extractor(const MPEG4Extractor &); 146 MPEG4Extractor &operator=(const MPEG4Extractor &); 147 }; 148 149 bool SniffMPEG4( 150 DataSourceBase *source, String8 *mimeType, float *confidence, 151 sp<AMessage> *); 152 153 } // namespace android 154 155 #endif // MPEG4_EXTRACTOR_H_ 156