| /* |
| * 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 WEBRTC_MODULES_CONGESTION_CONTROLLER_BITRATE_ESTIMATOR_H_ |
| #define WEBRTC_MODULES_CONGESTION_CONTROLLER_BITRATE_ESTIMATOR_H_ |
| |
| #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 { |
| public: |
| BitrateEstimator(); |
| virtual ~BitrateEstimator(); |
| virtual void Update(int64_t now_ms, int bytes); |
| |
| virtual rtc::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 current_win_ms_; |
| int64_t prev_time_ms_; |
| float bitrate_estimate_; |
| float bitrate_estimate_var_; |
| }; |
| |
| } // namespace webrtc |
| |
| #endif // WEBRTC_MODULES_CONGESTION_CONTROLLER_BITRATE_ESTIMATOR_H_ |