Repo created

TMessagesProj/jni/voip/libtgvoip/video/ScreamCongestionController.h

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