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 <media/stagefright/foundation/ABase.h> 21#include <media/stagefright/MediaSource.h> 22#include <media/IMediaExtractor.h> 23#include <utils/Errors.h> 24#include <utils/KeyedVector.h> 25#include <utils/RefBase.h> 26#include <utils/String8.h> 27#include <utils/threads.h> 28#include <utils/Vector.h> 29 30namespace android { 31namespace media { 32class ICas; 33} 34using namespace media; 35 36struct ABuffer; 37struct AMessage; 38class DataSource; 39struct IMediaHTTPService; 40class MediaBuffer; 41class MediaExtractor; 42struct MediaSource; 43class MetaData; 44 45struct NuMediaExtractor : public RefBase { 46 enum SampleFlags { 47 SAMPLE_FLAG_SYNC = 1, 48 SAMPLE_FLAG_ENCRYPTED = 2, 49 }; 50 51 // identical to IMediaExtractor::GetTrackMetaDataFlags 52 enum GetTrackFormatFlags { 53 kIncludeExtensiveMetaData = 1, // reads sample table and possibly stream headers 54 }; 55 56 NuMediaExtractor(); 57 58 status_t setDataSource( 59 const sp<IMediaHTTPService> &httpService, 60 const char *path, 61 const KeyedVector<String8, String8> *headers = NULL); 62 63 status_t setDataSource(int fd, off64_t offset, off64_t size); 64 65 status_t setDataSource(const sp<DataSource> &datasource); 66 67 status_t setMediaCas(const sp<ICas> &cas); 68 69 size_t countTracks() const; 70 status_t getTrackFormat(size_t index, sp<AMessage> *format, uint32_t flags = 0) const; 71 72 status_t getFileFormat(sp<AMessage> *format) const; 73 74 status_t selectTrack(size_t index); 75 status_t unselectTrack(size_t index); 76 77 status_t seekTo( 78 int64_t timeUs, 79 MediaSource::ReadOptions::SeekMode mode = 80 MediaSource::ReadOptions::SEEK_CLOSEST_SYNC); 81 82 status_t advance(); 83 status_t readSampleData(const sp<ABuffer> &buffer); 84 status_t getSampleTrackIndex(size_t *trackIndex); 85 status_t getSampleTime(int64_t *sampleTimeUs); 86 status_t getSampleMeta(sp<MetaData> *sampleMeta); 87 status_t getMetrics(Parcel *reply); 88 89 bool getCachedDuration(int64_t *durationUs, bool *eos) const; 90 91protected: 92 virtual ~NuMediaExtractor(); 93 94private: 95 enum TrackFlags { 96 kIsVorbis = 1, 97 }; 98 99 enum { 100 kMaxTrackCount = 16384, 101 }; 102 103 struct TrackInfo { 104 sp<IMediaSource> mSource; 105 size_t mTrackIndex; 106 status_t mFinalResult; 107 MediaBuffer *mSample; 108 int64_t mSampleTimeUs; 109 110 uint32_t mTrackFlags; // bitmask of "TrackFlags" 111 }; 112 113 mutable Mutex mLock; 114 115 sp<DataSource> mDataSource; 116 117 sp<IMediaExtractor> mImpl; 118 sp<ICas> mCas; 119 120 Vector<TrackInfo> mSelectedTracks; 121 int64_t mTotalBitrate; // in bits/sec 122 int64_t mDurationUs; 123 124 ssize_t fetchTrackSamples( 125 int64_t seekTimeUs = -1ll, 126 MediaSource::ReadOptions::SeekMode mode = 127 MediaSource::ReadOptions::SEEK_CLOSEST_SYNC); 128 129 void releaseTrackSamples(); 130 131 bool getTotalBitrate(int64_t *bitRate) const; 132 status_t updateDurationAndBitrate(); 133 status_t appendVorbisNumPageSamples(TrackInfo *info, const sp<ABuffer> &buffer); 134 135 DISALLOW_EVIL_CONSTRUCTORS(NuMediaExtractor); 136}; 137 138} // namespace android 139 140#endif // NU_MEDIA_EXTRACTOR_H_ 141 142