| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef LIVE_SESSION_H_ |
| |
| #define LIVE_SESSION_H_ |
| |
| #include <media/stagefright/foundation/AHandler.h> |
| |
| #include <utils/String8.h> |
| |
| namespace android { |
| |
| struct ABuffer; |
| struct DataSource; |
| struct LiveDataSource; |
| struct M3UParser; |
| struct HTTPBase; |
| |
| struct LiveSession : public AHandler { |
| enum Flags { |
| // Don't log any URLs. |
| kFlagIncognito = 1, |
| }; |
| LiveSession(uint32_t flags = 0, bool uidValid = false, uid_t uid = 0); |
| |
| sp<DataSource> getDataSource(); |
| |
| void connect( |
| const char *url, |
| const KeyedVector<String8, String8> *headers = NULL); |
| |
| void disconnect(); |
| |
| // Blocks until seek is complete. |
| void seekTo(int64_t timeUs); |
| |
| status_t getDuration(int64_t *durationUs); |
| bool isSeekable(); |
| |
| protected: |
| virtual ~LiveSession(); |
| |
| virtual void onMessageReceived(const sp<AMessage> &msg); |
| |
| private: |
| enum { |
| kMaxNumQueuedFragments = 3, |
| kMaxNumRetries = 5, |
| }; |
| |
| enum { |
| kWhatConnect = 'conn', |
| kWhatDisconnect = 'disc', |
| kWhatMonitorQueue = 'moni', |
| kWhatSeek = 'seek', |
| }; |
| |
| struct BandwidthItem { |
| AString mURI; |
| unsigned long mBandwidth; |
| }; |
| |
| uint32_t mFlags; |
| bool mUIDValid; |
| uid_t mUID; |
| |
| sp<LiveDataSource> mDataSource; |
| |
| sp<HTTPBase> mHTTPDataSource; |
| |
| AString mMasterURL; |
| KeyedVector<String8, String8> mExtraHeaders; |
| |
| Vector<BandwidthItem> mBandwidthItems; |
| |
| KeyedVector<AString, sp<ABuffer> > mAESKeyForURI; |
| |
| ssize_t mPrevBandwidthIndex; |
| int64_t mLastPlaylistFetchTimeUs; |
| sp<M3UParser> mPlaylist; |
| int32_t mSeqNumber; |
| int64_t mSeekTimeUs; |
| int32_t mNumRetries; |
| |
| Mutex mLock; |
| Condition mCondition; |
| int64_t mDurationUs; |
| bool mSeekDone; |
| bool mDisconnectPending; |
| |
| int32_t mMonitorQueueGeneration; |
| |
| enum RefreshState { |
| INITIAL_MINIMUM_RELOAD_DELAY, |
| FIRST_UNCHANGED_RELOAD_ATTEMPT, |
| SECOND_UNCHANGED_RELOAD_ATTEMPT, |
| THIRD_UNCHANGED_RELOAD_ATTEMPT |
| }; |
| RefreshState mRefreshState; |
| |
| uint8_t mPlaylistHash[16]; |
| |
| void onConnect(const sp<AMessage> &msg); |
| void onDisconnect(); |
| void onDownloadNext(); |
| void onMonitorQueue(); |
| void onSeek(const sp<AMessage> &msg); |
| |
| status_t fetchFile( |
| const char *url, sp<ABuffer> *out, |
| int64_t range_offset = 0, int64_t range_length = -1); |
| |
| sp<M3UParser> fetchPlaylist(const char *url, bool *unchanged); |
| size_t getBandwidthIndex(); |
| |
| status_t decryptBuffer( |
| size_t playlistIndex, const sp<ABuffer> &buffer); |
| |
| void postMonitorQueue(int64_t delayUs = 0); |
| |
| bool timeToRefreshPlaylist(int64_t nowUs) const; |
| |
| static int SortByBandwidth(const BandwidthItem *, const BandwidthItem *); |
| |
| DISALLOW_EVIL_CONSTRUCTORS(LiveSession); |
| }; |
| |
| } // namespace android |
| |
| #endif // LIVE_SESSION_H_ |