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88290ae358
This is a reland of fa79081dca
It crashed due to inability to handle small timestamps in probe
estimator. This was fixed by moving history window check to avoid
subtracting from the timestamp.
Original change's description:
> Cleanup of RTP references in GoogCC implementation.
>
> As the send time congestion controller now has been removed,
> we don't need the RTP related constructs anymore.
>
> Bug: webrtc:9510
> Change-Id: I02c059ed8ae907ab4672d183c5639ad459b581aa
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/142221
> Commit-Queue: Sebastian Jansson <srte@webrtc.org>
> Reviewed-by: Björn Terelius <terelius@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#28330}
Bug: webrtc:9510
Change-Id: I3bf91222068e4fbb6aa159bfeb7a73e00bb6a0d7
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/143165
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#28347}
57 lines
2.1 KiB
C++
57 lines
2.1 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 <stdint.h>
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#include "absl/types/optional.h"
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#include "api/transport/webrtc_key_value_config.h"
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#include "api/units/data_rate.h"
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#include "api/units/timestamp.h"
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#include "rtc_base/experiments/field_trial_parser.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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explicit BitrateEstimator(const WebRtcKeyValueConfig* key_value_config);
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virtual ~BitrateEstimator();
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virtual void Update(Timestamp at_time, DataSize amount, bool in_alr);
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virtual absl::optional<DataRate> bitrate() const;
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absl::optional<DataRate> PeekRate() 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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FieldTrialConstrained<int> initial_window_ms_;
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FieldTrialConstrained<int> noninitial_window_ms_;
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FieldTrialParameter<double> uncertainty_scale_;
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FieldTrialParameter<double> uncertainty_scale_in_alr_;
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FieldTrialParameter<DataRate> uncertainty_symmetry_cap_;
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FieldTrialParameter<DataRate> estimate_floor_;
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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_kbps_;
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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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