885cf60106
This prepares for providing an additional implementation of delay based rate control. By moving the probe controller, less code will have to be added in the upcoming CL. Bug: webrtc:9718 Change-Id: I64eb2c8f5f7950b6e9d209f110dc0a757c710b4b Reviewed-on: https://webrtc-review.googlesource.com/c/111860 Commit-Queue: Sebastian Jansson <srte@webrtc.org> Reviewed-by: Christoffer Rodbro <crodbro@webrtc.org> Cr-Commit-Position: refs/heads/master@{#25770}
94 lines
3.3 KiB
C++
94 lines
3.3 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_GOOG_CC_DELAY_BASED_BWE_H_
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#define MODULES_CONGESTION_CONTROLLER_GOOG_CC_DELAY_BASED_BWE_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <memory>
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#include <vector>
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#include "absl/types/optional.h"
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#include "modules/congestion_controller/goog_cc/delay_increase_detector_interface.h"
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#include "modules/congestion_controller/goog_cc/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/bwe_defines.h"
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#include "modules/remote_bitrate_estimator/inter_arrival.h"
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#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h" // For PacketFeedback
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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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struct Result {
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Result();
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Result(bool probe, DataRate target_bitrate);
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~Result();
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bool updated;
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bool probe;
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DataRate target_bitrate = DataRate::Zero();
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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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absl::optional<DataRate> acked_bitrate,
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absl::optional<DataRate> probe_bitrate,
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Timestamp at_time);
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Result OnDelayedFeedback(Timestamp receive_time);
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void OnRttUpdate(TimeDelta avg_rtt);
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bool LatestEstimate(std::vector<uint32_t>* ssrcs, DataRate* bitrate) const;
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void SetStartBitrate(DataRate start_bitrate);
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void SetMinBitrate(DataRate min_bitrate);
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TimeDelta GetExpectedBwePeriod() const;
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private:
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friend class GoogCcStatePrinter;
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void IncomingPacketFeedback(const PacketFeedback& packet_feedback,
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Timestamp at_time);
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Result OnLongFeedbackDelay(Timestamp arrival_time);
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Result MaybeUpdateEstimate(absl::optional<DataRate> acked_bitrate,
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absl::optional<DataRate> probe_bitrate,
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bool request_probe,
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Timestamp at_time);
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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(Timestamp now,
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absl::optional<DataRate> acked_bitrate,
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DataRate* target_bitrate);
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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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Timestamp last_seen_packet_;
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bool uma_recorded_;
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AimdRateControl rate_control_;
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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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DataRate 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_GOOG_CC_DELAY_BASED_BWE_H_
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