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 25namespace android { 26 27struct ABuffer; 28struct DataSource; 29struct LiveDataSource; 30struct M3UParser; 31struct HTTPBase; 32 33struct LiveSession : public AHandler { 34 enum Flags { 35 // Don't log any URLs. 36 kFlagIncognito = 1, 37 }; 38 LiveSession(uint32_t flags = 0, bool uidValid = false, uid_t uid = 0); 39 40 sp<DataSource> getDataSource(); 41 42 void connect( 43 const char *url, 44 const KeyedVector<String8, String8> *headers = NULL); 45 46 void disconnect(); 47 48 // Blocks until seek is complete. 49 void seekTo(int64_t timeUs); 50 51 status_t getDuration(int64_t *durationUs); 52 bool isSeekable(); 53 54protected: 55 virtual ~LiveSession(); 56 57 virtual void onMessageReceived(const sp<AMessage> &msg); 58 59private: 60 enum { 61 kMaxNumQueuedFragments = 3, 62 kMaxNumRetries = 5, 63 }; 64 65 enum { 66 kWhatConnect = 'conn', 67 kWhatDisconnect = 'disc', 68 kWhatMonitorQueue = 'moni', 69 kWhatSeek = 'seek', 70 }; 71 72 struct BandwidthItem { 73 AString mURI; 74 unsigned long mBandwidth; 75 }; 76 77 uint32_t mFlags; 78 bool mUIDValid; 79 uid_t mUID; 80 81 sp<LiveDataSource> mDataSource; 82 83 sp<HTTPBase> mHTTPDataSource; 84 85 AString mMasterURL; 86 KeyedVector<String8, String8> mExtraHeaders; 87 88 Vector<BandwidthItem> mBandwidthItems; 89 90 KeyedVector<AString, sp<ABuffer> > mAESKeyForURI; 91 92 ssize_t mPrevBandwidthIndex; 93 int64_t mLastPlaylistFetchTimeUs; 94 sp<M3UParser> mPlaylist; 95 int32_t mSeqNumber; 96 int64_t mSeekTimeUs; 97 int32_t mNumRetries; 98 99 Mutex mLock; 100 Condition mCondition; 101 int64_t mDurationUs; 102 bool mSeekDone; 103 bool mDisconnectPending; 104 105 int32_t mMonitorQueueGeneration; 106 107 enum RefreshState { 108 INITIAL_MINIMUM_RELOAD_DELAY, 109 FIRST_UNCHANGED_RELOAD_ATTEMPT, 110 SECOND_UNCHANGED_RELOAD_ATTEMPT, 111 THIRD_UNCHANGED_RELOAD_ATTEMPT 112 }; 113 RefreshState mRefreshState; 114 115 uint8_t mPlaylistHash[16]; 116 117 void onConnect(const sp<AMessage> &msg); 118 void onDisconnect(); 119 void onDownloadNext(); 120 void onMonitorQueue(); 121 void onSeek(const sp<AMessage> &msg); 122 123 status_t fetchFile( 124 const char *url, sp<ABuffer> *out, 125 int64_t range_offset = 0, int64_t range_length = -1); 126 127 sp<M3UParser> fetchPlaylist(const char *url, bool *unchanged); 128 size_t getBandwidthIndex(); 129 130 status_t decryptBuffer( 131 size_t playlistIndex, const sp<ABuffer> &buffer); 132 133 void postMonitorQueue(int64_t delayUs = 0); 134 135 bool timeToRefreshPlaylist(int64_t nowUs) const; 136 137 static int SortByBandwidth(const BandwidthItem *, const BandwidthItem *); 138 139 DISALLOW_EVIL_CONSTRUCTORS(LiveSession); 140}; 141 142} // namespace android 143 144#endif // LIVE_SESSION_H_ 145