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Side by Side Diff: webrtc/modules/congestion_controller/acknowledge_bitrate_estimator.h

Issue 2931873002: Test and fix for huge bwe drop after alr state. (Closed)
Patch Set: Response to comments. Created 3 years, 6 months ago
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1 /*
2 * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #ifndef WEBRTC_MODULES_CONGESTION_CONTROLLER_ACKNOWLEDGE_BITRATE_ESTIMATOR_H_
12 #define WEBRTC_MODULES_CONGESTION_CONTROLLER_ACKNOWLEDGE_BITRATE_ESTIMATOR_H_
13
14 #include <vector>
15
16 #include "webrtc/base/optional.h"
17
18 namespace webrtc {
19
20 struct PacketFeedback;
21
22 // Computes a bayesian estimate of the throughput given acks containing
23 // the arrival time and payload size. Samples which are far from the current
24 // estimate or are based on few packets are given a smaller weight, as they
25 // are considered to be more likely to have been caused by, e.g., delay spikes
26 // unrelated to congestion.
27 class AcknowledgedBitrateEstimator {
28 public:
29 AcknowledgedBitrateEstimator();
30
31 void IncomingPacketFeedbackVector(
32 const std::vector<PacketFeedback>& packet_feedback_vector);
33 rtc::Optional<uint32_t> bitrate_bps() const;
34
35 private:
36 void Update(int64_t now_ms, int bytes);
37 float UpdateWindow(int64_t now_ms, int bytes, int rate_window_ms);
38
39 int sum_;
40 int64_t current_win_ms_;
41 int64_t prev_time_ms_;
42 float bitrate_estimate_;
43 float bitrate_estimate_var_;
44 };
45
46 } // namespace webrtc
47
48 #endif // WEBRTC_MODULES_CONGESTION_CONTROLLER_ACKNOWLEDGE_BITRATE_ESTIMATOR_H_
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