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