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/KeyedVector.h> 25 #include <utils/List.h> 26 #include <utils/threads.h> 27 28 namespace android { 29 30 struct HTTPBase : public DataSource { 31 enum Flags { 32 // Don't log any URLs. 33 kFlagIncognito = 1 34 }; 35 36 HTTPBase(); 37 38 virtual status_t connect( 39 const char *uri, 40 const KeyedVector<String8, String8> *headers = NULL, 41 off64_t offset = 0) = 0; 42 43 virtual void disconnect() = 0; 44 45 // Returns true if bandwidth could successfully be estimated, 46 // false otherwise. 47 virtual bool estimateBandwidth(int32_t *bandwidth_bps); 48 49 virtual status_t getEstimatedBandwidthKbps(int32_t *kbps); 50 51 virtual status_t setBandwidthStatCollectFreq(int32_t freqMs); 52 53 virtual void setBandwidthHistorySize(size_t numHistoryItems); 54 toStringHTTPBase55 virtual String8 toString() { 56 return mName; 57 } 58 59 protected: 60 virtual void addBandwidthMeasurement(size_t numBytes, int64_t delayUs); 61 String8 mName; 62 63 private: 64 struct BandwidthEntry { 65 int64_t mDelayUs; 66 size_t mNumBytes; 67 }; 68 69 Mutex mLock; 70 71 List<BandwidthEntry> mBandwidthHistory; 72 size_t mNumBandwidthHistoryItems; 73 int64_t mTotalTransferTimeUs; 74 size_t mTotalTransferBytes; 75 size_t mMaxBandwidthHistoryItems; 76 77 enum { 78 kMinBandwidthCollectFreqMs = 1000, // 1 second 79 kMaxBandwidthCollectFreqMs = 60000, // one minute 80 }; 81 82 int64_t mPrevBandwidthMeasureTimeUs; 83 int32_t mPrevEstimatedBandWidthKbps; 84 int32_t mBandWidthCollectFreqMs; 85 86 DISALLOW_EVIL_CONSTRUCTORS(HTTPBase); 87 }; 88 89 } // namespace android 90 91 #endif // HTTP_BASE_H_ 92