1 /* 2 * Copyright (C) 2010 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 LIVE_SESSION_H_ 18 19 #define LIVE_SESSION_H_ 20 21 #include <media/stagefright/foundation/AHandler.h> 22 23 #include <utils/String8.h> 24 25 namespace android { 26 27 struct ABuffer; 28 struct AnotherPacketSource; 29 struct DataSource; 30 struct HTTPBase; 31 struct LiveDataSource; 32 struct M3UParser; 33 struct PlaylistFetcher; 34 struct Parcel; 35 36 struct LiveSession : public AHandler { 37 enum Flags { 38 // Don't log any URLs. 39 kFlagIncognito = 1, 40 }; 41 LiveSession( 42 const sp<AMessage> ¬ify, 43 uint32_t flags = 0, bool uidValid = false, uid_t uid = 0); 44 45 enum StreamType { 46 STREAMTYPE_AUDIO = 1, 47 STREAMTYPE_VIDEO = 2, 48 STREAMTYPE_SUBTITLES = 4, 49 }; 50 status_t dequeueAccessUnit(StreamType stream, sp<ABuffer> *accessUnit); 51 52 status_t getStreamFormat(StreamType stream, sp<AMessage> *format); 53 54 void connectAsync( 55 const char *url, 56 const KeyedVector<String8, String8> *headers = NULL); 57 58 status_t disconnect(); 59 60 // Blocks until seek is complete. 61 status_t seekTo(int64_t timeUs); 62 63 status_t getDuration(int64_t *durationUs) const; 64 status_t getTrackInfo(Parcel *reply) const; 65 status_t selectTrack(size_t index, bool select); 66 67 bool isSeekable() const; 68 bool hasDynamicDuration() const; 69 70 enum { 71 kWhatStreamsChanged, 72 kWhatError, 73 kWhatPrepared, 74 kWhatPreparationFailed, 75 }; 76 77 protected: 78 virtual ~LiveSession(); 79 80 virtual void onMessageReceived(const sp<AMessage> &msg); 81 82 private: 83 friend struct PlaylistFetcher; 84 85 enum { 86 kWhatConnect = 'conn', 87 kWhatDisconnect = 'disc', 88 kWhatSeek = 'seek', 89 kWhatFetcherNotify = 'notf', 90 kWhatCheckBandwidth = 'bndw', 91 kWhatChangeConfiguration = 'chC0', 92 kWhatChangeConfiguration2 = 'chC2', 93 kWhatChangeConfiguration3 = 'chC3', 94 kWhatFinishDisconnect2 = 'fin2', 95 }; 96 97 struct BandwidthItem { 98 size_t mPlaylistIndex; 99 unsigned long mBandwidth; 100 }; 101 102 struct FetcherInfo { 103 sp<PlaylistFetcher> mFetcher; 104 int64_t mDurationUs; 105 bool mIsPrepared; 106 }; 107 108 sp<AMessage> mNotify; 109 uint32_t mFlags; 110 bool mUIDValid; 111 uid_t mUID; 112 113 bool mInPreparationPhase; 114 115 sp<HTTPBase> mHTTPDataSource; 116 KeyedVector<String8, String8> mExtraHeaders; 117 118 AString mMasterURL; 119 120 Vector<BandwidthItem> mBandwidthItems; 121 ssize_t mPrevBandwidthIndex; 122 123 sp<M3UParser> mPlaylist; 124 125 KeyedVector<AString, FetcherInfo> mFetcherInfos; 126 AString mAudioURI, mVideoURI, mSubtitleURI; 127 uint32_t mStreamMask; 128 129 KeyedVector<StreamType, sp<AnotherPacketSource> > mPacketSources; 130 131 int32_t mCheckBandwidthGeneration; 132 133 size_t mContinuationCounter; 134 sp<AMessage> mContinuation; 135 136 int64_t mLastDequeuedTimeUs; 137 int64_t mRealTimeBaseUs; 138 139 bool mReconfigurationInProgress; 140 uint32_t mDisconnectReplyID; 141 142 sp<PlaylistFetcher> addFetcher(const char *uri); 143 144 void onConnect(const sp<AMessage> &msg); 145 status_t onSeek(const sp<AMessage> &msg); 146 void onFinishDisconnect2(); 147 148 status_t fetchFile( 149 const char *url, sp<ABuffer> *out, 150 int64_t range_offset = 0, int64_t range_length = -1); 151 152 sp<M3UParser> fetchPlaylist( 153 const char *url, uint8_t *curPlaylistHash, bool *unchanged); 154 155 size_t getBandwidthIndex(); 156 157 static int SortByBandwidth(const BandwidthItem *, const BandwidthItem *); 158 159 void changeConfiguration( 160 int64_t timeUs, size_t bandwidthIndex, bool pickTrack = false); 161 void onChangeConfiguration(const sp<AMessage> &msg); 162 void onChangeConfiguration2(const sp<AMessage> &msg); 163 void onChangeConfiguration3(const sp<AMessage> &msg); 164 165 void scheduleCheckBandwidthEvent(); 166 void cancelCheckBandwidthEvent(); 167 168 void onCheckBandwidth(); 169 170 void finishDisconnect(); 171 172 void postPrepared(status_t err); 173 174 DISALLOW_EVIL_CONSTRUCTORS(LiveSession); 175 }; 176 177 } // namespace android 178 179 #endif // LIVE_SESSION_H_ 180