1 /* 2 * Copyright 2012, 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 NU_MEDIA_EXTRACTOR_H_ 18 #define NU_MEDIA_EXTRACTOR_H_ 19 20 #include <list> 21 #include <media/mediaplayer.h> 22 #include <media/stagefright/foundation/ABase.h> 23 #include <media/stagefright/foundation/AudioPresentationInfo.h> 24 #include <android/IMediaExtractor.h> 25 #include <media/stagefright/MediaSource.h> 26 #include <utils/Errors.h> 27 #include <utils/KeyedVector.h> 28 #include <utils/RefBase.h> 29 #include <utils/String8.h> 30 #include <utils/threads.h> 31 #include <utils/Vector.h> 32 33 namespace android { 34 35 struct ABuffer; 36 struct AMessage; 37 class DataSource; 38 struct MediaHTTPService; 39 class MediaBuffer; 40 class MediaExtractor; 41 struct MediaSource; 42 class MetaData; 43 44 struct NuMediaExtractor : public RefBase { 45 enum SampleFlags { 46 SAMPLE_FLAG_SYNC = 1, 47 SAMPLE_FLAG_ENCRYPTED = 2, 48 }; 49 50 typedef IMediaExtractor::EntryPoint EntryPoint; 51 52 // identical to IMediaExtractor::GetTrackMetaDataFlags 53 enum GetTrackFormatFlags { 54 kIncludeExtensiveMetaData = 1, // reads sample table and possibly stream headers 55 }; 56 57 explicit NuMediaExtractor(EntryPoint entryPoint); 58 59 status_t setDataSource( 60 const sp<MediaHTTPService> &httpService, 61 const char *path, 62 const KeyedVector<String8, String8> *headers = NULL); 63 64 status_t setDataSource(int fd, off64_t offset, off64_t size); 65 66 status_t setDataSource(const sp<DataSource> &datasource); 67 68 status_t setMediaCas(const HInterfaceToken &casToken); 69 70 size_t countTracks() const; 71 status_t getTrackFormat(size_t index, sp<AMessage> *format, uint32_t flags = 0) const; 72 73 status_t getFileFormat(sp<AMessage> *format) const; 74 75 status_t getExifOffsetSize(off64_t *offset, size_t *size) const; 76 77 status_t selectTrack(size_t index, int64_t startTimeUs = -1ll, 78 MediaSource::ReadOptions::SeekMode mode = 79 MediaSource::ReadOptions::SEEK_CLOSEST_SYNC); 80 status_t unselectTrack(size_t index); 81 82 status_t seekTo( 83 int64_t timeUs, 84 MediaSource::ReadOptions::SeekMode mode = 85 MediaSource::ReadOptions::SEEK_CLOSEST_SYNC); 86 87 // Each selected track has a read pointer. 88 // advance() advances the read pointer with the lowest timestamp. 89 status_t advance(); 90 // readSampleData() reads the sample with the lowest timestamp. 91 status_t readSampleData(const sp<ABuffer> &buffer); 92 93 status_t getSampleSize(size_t *sampleSize); 94 status_t getSampleTrackIndex(size_t *trackIndex); 95 status_t getSampleTime(int64_t *sampleTimeUs); 96 status_t getSampleMeta(sp<MetaData> *sampleMeta); 97 status_t getMetrics(Parcel *reply); 98 99 bool getCachedDuration(int64_t *durationUs, bool *eos) const; 100 101 status_t getAudioPresentations(size_t trackIdx, AudioPresentationCollection *presentations); 102 103 status_t setLogSessionId(const String8& logSessionId); 104 105 const char* getName() const; 106 107 protected: 108 virtual ~NuMediaExtractor(); 109 110 private: 111 enum TrackFlags { 112 kIsVorbis = 1, 113 }; 114 115 enum { 116 kMaxTrackCount = 16384, 117 }; 118 119 struct Sample { 120 Sample(); 121 Sample(MediaBufferBase *buffer, int64_t timeUs); 122 MediaBufferBase *mBuffer; 123 int64_t mSampleTimeUs; 124 }; 125 126 struct TrackInfo { 127 sp<IMediaSource> mSource; 128 size_t mTrackIndex; 129 media_track_type mTrackType; 130 size_t mMaxFetchCount; 131 status_t mFinalResult; 132 std::list<Sample> mSamples; 133 134 uint32_t mTrackFlags; // bitmask of "TrackFlags" 135 }; 136 137 const EntryPoint mEntryPoint; 138 139 mutable Mutex mLock; 140 141 sp<DataSource> mDataSource; 142 143 sp<IMediaExtractor> mImpl; 144 HInterfaceToken mCasToken; 145 146 Vector<TrackInfo> mSelectedTracks; 147 int64_t mTotalBitrate; // in bits/sec 148 int64_t mDurationUs; 149 150 void setEntryPointToRemoteMediaExtractor(); 151 152 ssize_t fetchAllTrackSamples( 153 int64_t seekTimeUs = -1ll, 154 MediaSource::ReadOptions::SeekMode mode = 155 MediaSource::ReadOptions::SEEK_CLOSEST_SYNC); 156 void fetchTrackSamples( 157 TrackInfo *info, 158 int64_t seekTimeUs = -1ll, 159 MediaSource::ReadOptions::SeekMode mode = 160 MediaSource::ReadOptions::SEEK_CLOSEST_SYNC); 161 162 void releaseTrackSamples(TrackInfo *info); 163 void releaseAllTrackSamples(); 164 165 bool getTotalBitrate(int64_t *bitRate) const; 166 status_t updateDurationAndBitrate(); 167 status_t appendVorbisNumPageSamples(MediaBufferBase *mbuf, const sp<ABuffer> &buffer); 168 169 DISALLOW_EVIL_CONSTRUCTORS(NuMediaExtractor); 170 }; 171 172 } // namespace android 173 174 #endif // NU_MEDIA_EXTRACTOR_H_ 175 176