mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-15 06:40:43 +01:00
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++
/*
|
|
* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#ifndef MODULES_CONGESTION_CONTROLLER_GOOG_CC_BITRATE_ESTIMATOR_H_
|
|
#define MODULES_CONGESTION_CONTROLLER_GOOG_CC_BITRATE_ESTIMATOR_H_
|
|
|
|
#include <vector>
|
|
|
|
#include "absl/types/optional.h"
|
|
|
|
namespace webrtc {
|
|
|
|
// Computes a bayesian estimate of the throughput given acks containing
|
|
// the arrival time and payload size. Samples which are far from the current
|
|
// estimate or are based on few packets are given a smaller weight, as they
|
|
// are considered to be more likely to have been caused by, e.g., delay spikes
|
|
// unrelated to congestion.
|
|
class BitrateEstimator {
|
|
public:
|
|
BitrateEstimator();
|
|
virtual ~BitrateEstimator();
|
|
virtual void Update(int64_t now_ms, int bytes);
|
|
|
|
virtual absl::optional<uint32_t> bitrate_bps() const;
|
|
|
|
virtual void ExpectFastRateChange();
|
|
|
|
private:
|
|
float UpdateWindow(int64_t now_ms, int bytes, int rate_window_ms);
|
|
int sum_;
|
|
int64_t initial_window_ms_;
|
|
int64_t current_window_ms_;
|
|
int64_t prev_time_ms_;
|
|
float bitrate_estimate_;
|
|
float bitrate_estimate_var_;
|
|
};
|
|
|
|
} // namespace webrtc
|
|
|
|
#endif // MODULES_CONGESTION_CONTROLLER_GOOG_CC_BITRATE_ESTIMATOR_H_
|