76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
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//
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// libtgvoip is free and unencumbered public domain software.
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// For more information, see http://unlicense.org or the UNLICENSE file
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// you should have received with this source code distribution.
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//
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#ifndef LIBTGVOIP_CONGESTIONCONTROL_H
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#define LIBTGVOIP_CONGESTIONCONTROL_H
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#include "threading.h"
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#include "Buffers.h"
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#include <cstdint>
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#include <cstdlib>
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#include <array>
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namespace tgvoip
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{
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enum class ConctlAct
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{
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NONE,
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INCREASE,
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DECREASE,
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};
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struct tgvoip_congestionctl_packet_t
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{
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double sendTime;
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std::size_t size;
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std::uint32_t seq;
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};
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class CongestionControl
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{
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public:
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CongestionControl();
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~CongestionControl();
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void PacketSent(std::uint32_t seq, std::size_t size);
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void PacketLost(std::uint32_t seq);
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void PacketAcknowledged(std::uint32_t seq);
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void Tick();
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double GetAverageRTT() const;
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double GetMinimumRTT() const;
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std::size_t GetInflightDataSize() const;
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std::size_t GetCongestionWindow() const;
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std::size_t GetAcknowledgedDataSize() const;
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ConctlAct GetBandwidthControlAction() const;
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std::uint32_t GetSendLossCount() const;
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private:
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HistoricBuffer<double, 100> m_rttHistory;
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HistoricBuffer<std::size_t, 30> m_inflightHistory;
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std::array<tgvoip_congestionctl_packet_t, 100> m_inflightPackets;
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double m_tmpRtt = 0;
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double m_lastActionRtt = 0;
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double m_stateTransitionTime = 0;
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mutable double m_lastActionTime = 0;
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std::size_t m_inflightDataSize = 0;
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std::size_t m_cwnd;
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int m_tmpRttCount = 0;
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std::uint32_t m_lossCount = 0;
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std::uint32_t m_lastSentSeq = 0;
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std::uint32_t m_tickCount = 0;
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};
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} // namespace tgvoip
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#endif // LIBTGVOIP_CONGESTIONCONTROL_H
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