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 uint32_t mHeaderTimescale; 86 87 Track *mFirstTrack, *mLastTrack; 88 89 sp<MetaData> mFileMetaData; 90 91 Vector<uint32_t> mPath; 92 String8 mLastCommentMean; 93 String8 mLastCommentName; 94 String8 mLastCommentData; 95 96 status_t readMetaData(); 97 status_t parseChunk(off64_t *offset, int depth); 98 status_t parseMetaData(off64_t offset, size_t size); 99 100 status_t updateAudioTrackInfoFromESDS_MPEG4Audio( 101 const void *esds_data, size_t esds_size); 102 103 static status_t verifyTrack(Track *track); 104 105 struct SINF { 106 SINF *next; 107 uint16_t trackID; 108 uint8_t IPMPDescriptorID; 109 ssize_t len; 110 char *IPMPData; 111 }; 112 113 SINF *mFirstSINF; 114 115 bool mIsDrm; 116 status_t parseDrmSINF(off64_t *offset, off64_t data_offset); 117 118 status_t parseTrackHeader(off64_t data_offset, off64_t data_size); 119 120 status_t parseSegmentIndex(off64_t data_offset, size_t data_size); 121 122 Track *findTrackByMimePrefix(const char *mimePrefix); 123 124 MPEG4Extractor(const MPEG4Extractor &); 125 MPEG4Extractor &operator=(const MPEG4Extractor &); 126 }; 127 128 bool SniffMPEG4( 129 const sp<DataSource> &source, String8 *mimeType, float *confidence, 130 sp<AMessage> *); 131 132 } // namespace android 133 134 #endif // MPEG4_EXTRACTOR_H_ 135