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e62c2f2c77
rename WebRtcKeyValueConfig to FieldTrialsView Bug: webrtc:10335 Change-Id: If725bd498c4c3daf144bee638230fa089fdde833 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/256965 Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Commit-Queue: Jonas Oreland <jonaso@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#36365}
76 lines
2.7 KiB
C++
76 lines
2.7 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_ALR_DETECTOR_H_
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#define MODULES_CONGESTION_CONTROLLER_GOOG_CC_ALR_DETECTOR_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 "absl/types/optional.h"
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#include "api/field_trials_view.h"
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#include "modules/pacing/interval_budget.h"
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#include "rtc_base/experiments/alr_experiment.h"
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#include "rtc_base/experiments/struct_parameters_parser.h"
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namespace webrtc {
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class RtcEventLog;
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struct AlrDetectorConfig {
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// Sent traffic ratio as a function of network capacity used to determine
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// application-limited region. ALR region start when bandwidth usage drops
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// below kAlrStartUsageRatio and ends when it raises above
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// kAlrEndUsageRatio. NOTE: This is intentionally conservative at the moment
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// until BW adjustments of application limited region is fine tuned.
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double bandwidth_usage_ratio = 0.65;
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double start_budget_level_ratio = 0.80;
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double stop_budget_level_ratio = 0.50;
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std::unique_ptr<StructParametersParser> Parser();
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};
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// Application limited region detector is a class that utilizes signals of
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// elapsed time and bytes sent to estimate whether network traffic is
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// currently limited by the application's ability to generate traffic.
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//
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// AlrDetector provides a signal that can be utilized to adjust
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// estimate bandwidth.
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// Note: This class is not thread-safe.
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class AlrDetector {
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public:
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AlrDetector(AlrDetectorConfig config, RtcEventLog* event_log);
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explicit AlrDetector(const FieldTrialsView* key_value_config);
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AlrDetector(const FieldTrialsView* key_value_config, RtcEventLog* event_log);
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~AlrDetector();
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void OnBytesSent(size_t bytes_sent, int64_t send_time_ms);
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// Set current estimated bandwidth.
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void SetEstimatedBitrate(int bitrate_bps);
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// Returns time in milliseconds when the current application-limited region
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// started or empty result if the sender is currently not application-limited.
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absl::optional<int64_t> GetApplicationLimitedRegionStartTime() const;
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private:
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friend class GoogCcStatePrinter;
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const AlrDetectorConfig conf_;
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absl::optional<int64_t> last_send_time_ms_;
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IntervalBudget alr_budget_;
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absl::optional<int64_t> alr_started_time_ms_;
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RtcEventLog* event_log_;
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};
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} // namespace webrtc
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#endif // MODULES_CONGESTION_CONTROLLER_GOOG_CC_ALR_DETECTOR_H_
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