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d97b862593
The current acknowledged bitrate (i.e. throughput) estimator takes 500ms to initialize. This CL creates a field trial to experiment with this arbitrary initialization time. Bug: webrtc:9492, webrtc:7746 Change-Id: I8a803f7bc0ee78856e808e289f37bab57d763efa Reviewed-on: https://webrtc-review.googlesource.com/87145 Reviewed-by: Philip Eliasson <philipel@webrtc.org> Commit-Queue: Björn Terelius <terelius@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23852}
47 lines
1.5 KiB
C++
47 lines
1.5 KiB
C++
/*
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* Copyright (c) 2017 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_BITRATE_ESTIMATOR_H_
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#define MODULES_CONGESTION_CONTROLLER_GOOG_CC_BITRATE_ESTIMATOR_H_
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#include <vector>
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#include "absl/types/optional.h"
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namespace webrtc {
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// Computes a bayesian estimate of the throughput given acks containing
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// the arrival time and payload size. Samples which are far from the current
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// estimate or are based on few packets are given a smaller weight, as they
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// are considered to be more likely to have been caused by, e.g., delay spikes
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// unrelated to congestion.
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class BitrateEstimator {
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public:
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BitrateEstimator();
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virtual ~BitrateEstimator();
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virtual void Update(int64_t now_ms, int bytes);
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virtual absl::optional<uint32_t> bitrate_bps() const;
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virtual void ExpectFastRateChange();
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private:
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float UpdateWindow(int64_t now_ms, int bytes, int rate_window_ms);
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int sum_;
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int64_t initial_window_ms_;
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int64_t current_window_ms_;
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int64_t prev_time_ms_;
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float bitrate_estimate_;
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float bitrate_estimate_var_;
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};
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} // namespace webrtc
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#endif // MODULES_CONGESTION_CONTROLLER_GOOG_CC_BITRATE_ESTIMATOR_H_
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