42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
/*
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* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "modules/congestion_controller/pcc/rtt_tracker.h"
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#include <algorithm>
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namespace webrtc {
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namespace pcc {
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RttTracker::RttTracker(TimeDelta initial_rtt, double alpha)
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: rtt_estimate_(initial_rtt), alpha_(alpha) {}
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void RttTracker::OnPacketsFeedback(
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const std::vector<PacketResult>& packet_feedbacks,
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Timestamp feedback_received_time) {
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TimeDelta packet_rtt = TimeDelta::MinusInfinity();
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for (const PacketResult& packet_result : packet_feedbacks) {
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if (packet_result.receive_time.IsInfinite())
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continue;
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packet_rtt = std::max<TimeDelta>(
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packet_rtt,
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feedback_received_time - packet_result.sent_packet.send_time);
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}
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if (packet_rtt.IsFinite())
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rtt_estimate_ = (1 - alpha_) * rtt_estimate_ + alpha_ * packet_rtt;
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}
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TimeDelta RttTracker::GetRtt() const {
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return rtt_estimate_;
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}
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} // namespace pcc
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} // namespace webrtc
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