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81 lines
2.1 KiB
C++
81 lines
2.1 KiB
C++
//
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// Created by Grishka on 25/02/2019.
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//
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#ifndef LIBTGVOIP_SCREAMCONGESTIONCONTROLLER_H
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#define LIBTGVOIP_SCREAMCONGESTIONCONTROLLER_H
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#include "../Buffers.h"
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#include <vector>
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#include <stdint.h>
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namespace tgvoip{
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namespace video{
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class ScreamCongestionController{
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public:
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ScreamCongestionController();
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void AdjustBitrate();
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void ProcessAcks(float oneWayDelay, uint32_t bytesNewlyAcked, uint32_t lossCount, double rtt);
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void ProcessPacketSent(uint32_t size);
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void ProcessPacketLost(uint32_t size);
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double GetPacingInterval();
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void UpdateMediaRate(uint32_t frameSize);
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uint32_t GetBitrate();
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private:
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void UpdateVariables(float qdelay);
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void UpdateCWnd(float qdelay);
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void AdjustQDelayTarget(float qdelay);
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void CalculateSendWindow(float qdelay);
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void UpdateBytesInFlightHistory();
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struct ValueSample{
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uint32_t sample;
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double time;
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};
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float qdelayTarget;
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float qdelayFractionAvg=0.0f;
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HistoricBuffer<float, 20> qdelayFractionHist;
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float qdelayTrend=0.0f;
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float qdelayTrendMem=0.0f;
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HistoricBuffer<float, 100> qdelayNormHist;
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bool inFastIncrease=true;
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uint32_t cwnd;
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uint32_t bytesNewlyAcked=0;
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uint32_t maxBytesInFlight=0;
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uint32_t sendWnd=0;
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uint32_t targetBitrate=0;
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uint32_t targetBitrateLastMax=1;
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float rateTransmit=0.0f;
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float rateAck=0.0f;
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float rateMedia=0.0f;
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float rateMediaMedian=0.0f;
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float sRTT=0.0f;
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uint32_t rtpQueueSize=0;
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uint32_t rtpSize=1024; //0;
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float lossEventRate=0.0f;
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bool lossPending=false;
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float prevOneWayDelay=0.0f;
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double ignoreLossesUntil=0.0;
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uint32_t prevLossCount=0;
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double lastTimeQDelayTrendWasGreaterThanLo=0.0;
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double lastVariablesUpdateTime=0.0;
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double lastRateAdjustmentTime=0.0;
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double lastCWndUpdateTime=0.0;
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uint32_t bytesInFlight=0;
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std::vector<ValueSample> bytesInFlightHistory;
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uint32_t bytesSent=0;
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uint32_t bytesAcked=0;
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uint32_t bytesMedia=0;
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double rateTransmitUpdateTime=0.0;
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double rateMediaUpdateTime=0.0;
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HistoricBuffer<float, 25> rateMediaHistory;
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};
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}
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}
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#endif //LIBTGVOIP_SCREAMCONGESTIONCONTROLLER_H
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