blob: ad7bef5fc296b657fafb6fee36bca0772e9cfafc [file] [log] [blame]
* 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.
#include <vector>
#include "webrtc/api/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 {
virtual ~BitrateEstimator();
virtual void Update(int64_t now_ms, int bytes);
virtual rtc::Optional<uint32_t> bitrate_bps() const;
virtual void ExpectFastRateChange();
float UpdateWindow(int64_t now_ms, int bytes, int rate_window_ms);
int sum_;
int64_t current_win_ms_;
int64_t prev_time_ms_;
float bitrate_estimate_;
float bitrate_estimate_var_;
} // namespace webrtc