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604fd2f1ab
Bug: webrtc:13555, webrtc:13082 Change-Id: I2c2cbcbd918f0cfa970c1a964893220ba11d4b41 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/247960 Reviewed-by: Artem Titov <titovartem@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: (Daniel.L) Byoungchan Lee <daniel.l@hpcnt.com> Cr-Commit-Position: refs/heads/main@{#35771}
83 lines
2.8 KiB
C++
83 lines
2.8 KiB
C++
/*
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* Copyright (c) 2013 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_REMOTE_BITRATE_ESTIMATOR_OVERUSE_ESTIMATOR_H_
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#define MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_ESTIMATOR_H_
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#include <stdint.h>
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#include <deque>
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#include "api/network_state_predictor.h"
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namespace webrtc {
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// Bandwidth over-use detector options. These are used to drive
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// experimentation with bandwidth estimation parameters.
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// TODO(terelius): This is only used in overuse_estimator.cc, and only in the
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// default constructed state. Can we move the relevant variables into that
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// class and delete this?
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struct OverUseDetectorOptions {
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OverUseDetectorOptions() = default;
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double initial_slope = 8.0 / 512.0;
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double initial_offset = 0;
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double initial_e[2][2] = {{100.0, 0.0}, {0.0, 1e-1}};
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double initial_process_noise[2] = {1e-13, 1e-3};
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double initial_avg_noise = 0.0;
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double initial_var_noise = 50.0;
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};
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class OveruseEstimator {
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public:
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explicit OveruseEstimator(const OverUseDetectorOptions& options);
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~OveruseEstimator();
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OveruseEstimator(const OveruseEstimator&) = delete;
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OveruseEstimator& operator=(const OveruseEstimator&) = delete;
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// Update the estimator with a new sample. The deltas should represent deltas
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// between timestamp groups as defined by the InterArrival class.
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// `current_hypothesis` should be the hypothesis of the over-use detector at
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// this time.
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void Update(int64_t t_delta,
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double ts_delta,
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int size_delta,
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BandwidthUsage current_hypothesis,
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int64_t now_ms);
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// Returns the estimated noise/jitter variance in ms^2.
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double var_noise() const { return var_noise_; }
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// Returns the estimated inter-arrival time delta offset in ms.
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double offset() const { return offset_; }
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// Returns the number of deltas which the current over-use estimator state is
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// based on.
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unsigned int num_of_deltas() const { return num_of_deltas_; }
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private:
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double UpdateMinFramePeriod(double ts_delta);
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void UpdateNoiseEstimate(double residual, double ts_delta, bool stable_state);
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// Must be first member variable. Cannot be const because we need to be
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// copyable.
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OverUseDetectorOptions options_;
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uint16_t num_of_deltas_;
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double slope_;
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double offset_;
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double prev_offset_;
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double E_[2][2];
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double process_noise_[2];
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double avg_noise_;
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double var_noise_;
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std::deque<double> ts_delta_hist_;
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};
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} // namespace webrtc
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#endif // MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_ESTIMATOR_H_
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