0cbcba7ea0
The goal of this work is to make it easier to experiment with the bandwidth estimation implementation. For this reason network control functionality is moved from SendSideCongestionController(SSCC), PacedSender and BitrateController to the newly created GoogCcNetworkController which implements the newly created NetworkControllerInterface. This allows the implementation to be replaced at runtime in the future. This is the first part of a split of a larger CL, see: https://webrtc-review.googlesource.com/c/src/+/39788/8 For further explanations. Bug: webrtc:8415 Change-Id: I770189c04cc31b313bd4e57821acff55fbcb1ad3 Reviewed-on: https://webrtc-review.googlesource.com/43840 Commit-Queue: Sebastian Jansson <srte@webrtc.org> Reviewed-by: Björn Terelius <terelius@webrtc.org> Reviewed-by: Stefan Holmer <stefan@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21868}
93 lines
3.1 KiB
C++
93 lines
3.1 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/delay_increase_detector_interface.h"
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#include "modules/congestion_controller/probe_bitrate_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 "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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explicit DelayBasedBwe(RtcEventLog* event_log);
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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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int64_t at_time_ms);
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void OnRttUpdate(int64_t avg_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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int64_t at_time_ms);
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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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int64_t at_time_ms);
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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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std::unique_ptr<InterArrival> inter_arrival_;
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std::unique_ptr<DelayIncreaseDetectorInterface> delay_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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