1 /* 2 * Copyright (C) 2011 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 HTTP_BASE_H_ 18 19 #define HTTP_BASE_H_ 20 21 #include <media/DataSource.h> 22 #include <media/stagefright/foundation/ABase.h> 23 #include <media/stagefright/MediaErrors.h> 24 #include <utils/List.h> 25 #include <utils/threads.h> 26 27 namespace android { 28 29 struct HTTPBase : public DataSource { 30 enum Flags { 31 // Don't log any URLs. 32 kFlagIncognito = 1 33 }; 34 35 HTTPBase(); 36 37 virtual status_t connect( 38 const char *uri, 39 const KeyedVector<String8, String8> *headers = NULL, 40 off64_t offset = 0) = 0; 41 42 virtual void disconnect() = 0; 43 44 // Returns true if bandwidth could successfully be estimated, 45 // false otherwise. 46 virtual bool estimateBandwidth(int32_t *bandwidth_bps); 47 48 virtual status_t getEstimatedBandwidthKbps(int32_t *kbps); 49 50 virtual status_t setBandwidthStatCollectFreq(int32_t freqMs); 51 52 virtual void setBandwidthHistorySize(size_t numHistoryItems); 53 toStringHTTPBase54 virtual String8 toString() { 55 return mName; 56 } 57 58 protected: 59 virtual void addBandwidthMeasurement(size_t numBytes, int64_t delayUs); 60 String8 mName; 61 62 private: 63 struct BandwidthEntry { 64 int64_t mDelayUs; 65 size_t mNumBytes; 66 }; 67 68 Mutex mLock; 69 70 List<BandwidthEntry> mBandwidthHistory; 71 size_t mNumBandwidthHistoryItems; 72 int64_t mTotalTransferTimeUs; 73 size_t mTotalTransferBytes; 74 size_t mMaxBandwidthHistoryItems; 75 76 enum { 77 kMinBandwidthCollectFreqMs = 1000, // 1 second 78 kMaxBandwidthCollectFreqMs = 60000, // one minute 79 }; 80 81 int64_t mPrevBandwidthMeasureTimeUs; 82 int32_t mPrevEstimatedBandWidthKbps; 83 int32_t mBandWidthCollectFreqMs; 84 85 DISALLOW_EVIL_CONSTRUCTORS(HTTPBase); 86 }; 87 88 } // namespace android 89 90 #endif // HTTP_BASE_H_ 91