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c643204321
Bug: webrtc:7508 Change-Id: If84910820c2ca4cf2acbe4830f07ec5219cff977 Reviewed-on: https://webrtc-review.googlesource.com/33003 Reviewed-by: Stefan Holmer <stefan@webrtc.org> Commit-Queue: Björn Terelius <terelius@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21514}
94 lines
3.2 KiB
C++
94 lines
3.2 KiB
C++
/*
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* Copyright (c) 2016 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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#ifndef MODULES_CONGESTION_CONTROLLER_DELAY_BASED_BWE_H_
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#define MODULES_CONGESTION_CONTROLLER_DELAY_BASED_BWE_H_
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#include <memory>
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#include <utility>
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#include <vector>
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#include "modules/congestion_controller/median_slope_estimator.h"
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#include "modules/congestion_controller/probe_bitrate_estimator.h"
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#include "modules/congestion_controller/trendline_estimator.h"
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#include "modules/remote_bitrate_estimator/aimd_rate_control.h"
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#include "modules/remote_bitrate_estimator/include/remote_bitrate_estimator.h"
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#include "modules/remote_bitrate_estimator/inter_arrival.h"
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#include "modules/remote_bitrate_estimator/overuse_detector.h"
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#include "modules/remote_bitrate_estimator/overuse_estimator.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/constructormagic.h"
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#include "rtc_base/race_checker.h"
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namespace webrtc {
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class RtcEventLog;
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class DelayBasedBwe {
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public:
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static const int64_t kStreamTimeOutMs = 2000;
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struct Result {
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Result();
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Result(bool probe, uint32_t target_bitrate_bps);
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~Result();
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bool updated;
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bool probe;
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uint32_t target_bitrate_bps;
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bool recovered_from_overuse;
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};
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DelayBasedBwe(RtcEventLog* event_log, const Clock* clock);
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virtual ~DelayBasedBwe();
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Result IncomingPacketFeedbackVector(
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const std::vector<PacketFeedback>& packet_feedback_vector,
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rtc::Optional<uint32_t> acked_bitrate_bps);
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void OnRttUpdate(int64_t avg_rtt_ms, int64_t max_rtt_ms);
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bool LatestEstimate(std::vector<uint32_t>* ssrcs,
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uint32_t* bitrate_bps) const;
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void SetStartBitrate(int start_bitrate_bps);
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void SetMinBitrate(int min_bitrate_bps);
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int64_t GetExpectedBwePeriodMs() const;
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private:
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void IncomingPacketFeedback(const PacketFeedback& packet_feedback);
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Result OnLongFeedbackDelay(int64_t arrival_time_ms);
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Result MaybeUpdateEstimate(rtc::Optional<uint32_t> acked_bitrate_bps,
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bool request_probe);
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// Updates the current remote rate estimate and returns true if a valid
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// estimate exists.
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bool UpdateEstimate(int64_t now_ms,
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rtc::Optional<uint32_t> acked_bitrate_bps,
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uint32_t* target_bitrate_bps);
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rtc::RaceChecker network_race_;
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RtcEventLog* const event_log_;
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const Clock* const clock_;
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std::unique_ptr<InterArrival> inter_arrival_;
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std::unique_ptr<TrendlineEstimator> trendline_estimator_;
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OveruseDetector detector_;
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int64_t last_seen_packet_ms_;
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bool uma_recorded_;
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AimdRateControl rate_control_;
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ProbeBitrateEstimator probe_bitrate_estimator_;
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size_t trendline_window_size_;
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double trendline_smoothing_coeff_;
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double trendline_threshold_gain_;
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int consecutive_delayed_feedbacks_;
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uint32_t prev_bitrate_;
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BandwidthUsage prev_state_;
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RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(DelayBasedBwe);
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};
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} // namespace webrtc
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#endif // MODULES_CONGESTION_CONTROLLER_DELAY_BASED_BWE_H_
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