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 struct Trex { 43 uint32_t track_ID; 44 uint32_t default_sample_description_index; 45 uint32_t default_sample_duration; 46 uint32_t default_sample_size; 47 uint32_t default_sample_flags; 48 }; 49 50 class MPEG4Extractor : public MediaExtractor { 51 public: 52 // Extractor assumes ownership of "source". 53 explicit MPEG4Extractor(const sp<DataSource> &source); 54 55 virtual size_t countTracks(); 56 virtual sp<IMediaSource> getTrack(size_t index); 57 virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags); 58 59 virtual sp<MetaData> getMetaData(); 60 virtual uint32_t flags() const; name()61 virtual const char * name() { return "MPEG4Extractor"; } 62 63 // for DRM 64 virtual char* getDrmTrackInfo(size_t trackID, int *len); 65 66 protected: 67 virtual ~MPEG4Extractor(); 68 69 virtual void populateMetrics(); 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 sp<MetaData> meta; 81 uint32_t timescale; 82 sp<SampleTable> sampleTable; 83 bool includes_expensive_metadata; 84 bool skipTrack; 85 }; 86 87 Vector<SidxEntry> mSidxEntries; 88 off64_t mMoofOffset; 89 bool mMoofFound; 90 bool mMdatFound; 91 92 Vector<PsshInfo> mPssh; 93 94 Vector<Trex> mTrex; 95 96 sp<DataSource> mDataSource; 97 status_t mInitCheck; 98 uint32_t mHeaderTimescale; 99 bool mIsQT; 100 101 Track *mFirstTrack, *mLastTrack; 102 103 sp<MetaData> mFileMetaData; 104 105 Vector<uint32_t> mPath; 106 String8 mLastCommentMean; 107 String8 mLastCommentName; 108 String8 mLastCommentData; 109 110 KeyedVector<uint32_t, AString> mMetaKeyMap; 111 112 status_t readMetaData(); 113 status_t parseChunk(off64_t *offset, int depth); 114 status_t parseITunesMetaData(off64_t offset, size_t size); 115 status_t parseColorInfo(off64_t offset, size_t size); 116 status_t parse3GPPMetaData(off64_t offset, size_t size, int depth); 117 void parseID3v2MetaData(off64_t offset); 118 status_t parseQTMetaKey(off64_t data_offset, size_t data_size); 119 status_t parseQTMetaVal(int32_t keyId, off64_t data_offset, size_t data_size); 120 121 status_t updateAudioTrackInfoFromESDS_MPEG4Audio( 122 const void *esds_data, size_t esds_size); 123 124 static status_t verifyTrack(Track *track); 125 126 struct SINF { 127 SINF *next; 128 uint16_t trackID; 129 uint8_t IPMPDescriptorID; 130 ssize_t len; 131 char *IPMPData; 132 }; 133 134 SINF *mFirstSINF; 135 136 bool mIsDrm; 137 status_t parseDrmSINF(off64_t *offset, off64_t data_offset); 138 139 status_t parseTrackHeader(off64_t data_offset, off64_t data_size); 140 141 status_t parseSegmentIndex(off64_t data_offset, size_t data_size); 142 143 Track *findTrackByMimePrefix(const char *mimePrefix); 144 145 status_t parseAC3SampleEntry(off64_t offset); 146 status_t parseAC3SpecificBox(off64_t offset, uint16_t sampleRate); 147 148 MPEG4Extractor(const MPEG4Extractor &); 149 MPEG4Extractor &operator=(const MPEG4Extractor &); 150 }; 151 152 bool SniffMPEG4( 153 const sp<DataSource> &source, String8 *mimeType, float *confidence, 154 sp<AMessage> *); 155 156 } // namespace android 157 158 #endif // MPEG4_EXTRACTOR_H_ 159