1 //***************************************************************** 2 /* 3 JackTrip: A System for High-Quality Audio Network Performance 4 over the Internet 5 6 Copyright (c) 2020 Juan-Pablo Caceres, Chris Chafe. 7 SoundWIRE group at CCRMA, Stanford University. 8 9 Permission is hereby granted, free of charge, to any person 10 obtaining a copy of this software and associated documentation 11 files (the "Software"), to deal in the Software without 12 restriction, including without limitation the rights to use, 13 copy, modify, merge, publish, distribute, sublicense, and/or sell 14 copies of the Software, and to permit persons to whom the 15 Software is furnished to do so, subject to the following 16 conditions: 17 18 The above copyright notice and this permission notice shall be 19 included in all copies or substantial portions of the Software. 20 21 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 22 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 23 OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 24 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 25 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 26 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 27 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 28 OTHER DEALINGS IN THE SOFTWARE. 29 */ 30 //***************************************************************** 31 32 /** 33 * \file JitterBuffer.h 34 * \author Anton Runov 35 * \date June 2020 36 */ 37 38 #ifndef __JITTERBUFFER_H__ 39 #define __JITTERBUFFER_H__ 40 41 #include "RingBuffer.h" 42 43 class JitterBuffer : public RingBuffer 44 { 45 public: 46 JitterBuffer(int buf_samples, int qlen, int sample_rate, int strategy, 47 int bcast_qlen, int channels, int bit_res); ~JitterBuffer()48 virtual ~JitterBuffer() {} 49 50 virtual bool insertSlotNonBlocking(const int8_t* ptrToSlot, int len, int lostLen); 51 virtual void readSlotNonBlocking(int8_t* ptrToReadSlot); 52 virtual void readBroadcastSlot(int8_t* ptrToReadSlot); 53 54 virtual bool getStats(IOStat* stat, bool reset); 55 56 protected: 57 void processPacketLoss(int lostLen); 58 59 protected: 60 int mMaxLatency; 61 int mNumChannels; 62 int mAudioBitRes; 63 int mMinStepSize; 64 int mFPP; 65 int mSampleRate; 66 int mInSlotSize; 67 bool mActive; 68 uint32_t mBroadcastLatency; 69 uint32_t mBroadcastPosition; 70 double mBroadcastPositionCorr; 71 72 double mUnderrunIncTolerance; 73 double mCorrIncTolerance; 74 double mOverflowDecTolerance; 75 int mOverflowDropStep; 76 uint32_t mLastCorrCounter; 77 int mLastCorrDirection; 78 double mMinLevelThreshold; lastCorrFactor()79 double lastCorrFactor() const {return 500.0 / std::max(500U, mLastCorrCounter);} 80 81 int mAutoQueue; 82 double mAutoQueueCorr; 83 double mAutoQFactor; 84 double mAutoQRate; 85 double mAutoQRateMin; 86 double mAutoQRateDecay; 87 }; 88 89 90 #endif //__JITTERBUFFER_H__ 91