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1 /* | 1 /* |
2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
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41 : updated(true), probe(probe), target_bitrate_bps(target_bitrate_bps) {} | 41 : updated(true), probe(probe), target_bitrate_bps(target_bitrate_bps) {} |
42 bool updated; | 42 bool updated; |
43 bool probe; | 43 bool probe; |
44 uint32_t target_bitrate_bps; | 44 uint32_t target_bitrate_bps; |
45 }; | 45 }; |
46 | 46 |
47 DelayBasedBwe(RtcEventLog* event_log, const Clock* clock); | 47 DelayBasedBwe(RtcEventLog* event_log, const Clock* clock); |
48 virtual ~DelayBasedBwe(); | 48 virtual ~DelayBasedBwe(); |
49 | 49 |
50 Result IncomingPacketFeedbackVector( | 50 Result IncomingPacketFeedbackVector( |
51 const std::vector<PacketFeedback>& packet_feedback_vector); | 51 const std::vector<PacketFeedback>& packet_feedback_vector, |
| 52 rtc::Optional<uint32_t> acked_bitrate_bps); |
52 void OnRttUpdate(int64_t avg_rtt_ms, int64_t max_rtt_ms); | 53 void OnRttUpdate(int64_t avg_rtt_ms, int64_t max_rtt_ms); |
53 bool LatestEstimate(std::vector<uint32_t>* ssrcs, | 54 bool LatestEstimate(std::vector<uint32_t>* ssrcs, |
54 uint32_t* bitrate_bps) const; | 55 uint32_t* bitrate_bps) const; |
55 void SetStartBitrate(int start_bitrate_bps); | 56 void SetStartBitrate(int start_bitrate_bps); |
56 void SetMinBitrate(int min_bitrate_bps); | 57 void SetMinBitrate(int min_bitrate_bps); |
57 int64_t GetExpectedBwePeriodMs() const; | 58 int64_t GetExpectedBwePeriodMs() const; |
58 | 59 |
59 private: | 60 private: |
60 // Computes a bayesian estimate of the throughput given acks containing | |
61 // the arrival time and payload size. Samples which are far from the current | |
62 // estimate or are based on few packets are given a smaller weight, as they | |
63 // are considered to be more likely to have been caused by, e.g., delay spikes | |
64 // unrelated to congestion. | |
65 class BitrateEstimator { | |
66 public: | |
67 BitrateEstimator(); | |
68 void Update(int64_t now_ms, int bytes); | |
69 rtc::Optional<uint32_t> bitrate_bps() const; | |
70 | |
71 private: | |
72 float UpdateWindow(int64_t now_ms, int bytes, int rate_window_ms); | |
73 int sum_; | |
74 int64_t current_win_ms_; | |
75 int64_t prev_time_ms_; | |
76 float bitrate_estimate_; | |
77 float bitrate_estimate_var_; | |
78 }; | |
79 | |
80 void IncomingPacketFeedback(const PacketFeedback& packet_feedback); | 61 void IncomingPacketFeedback(const PacketFeedback& packet_feedback); |
81 Result OnLongFeedbackDelay(int64_t arrival_time_ms); | 62 Result OnLongFeedbackDelay(int64_t arrival_time_ms); |
82 | 63 |
83 Result MaybeUpdateEstimate(bool overusing); | 64 Result MaybeUpdateEstimate(bool overusing, |
| 65 rtc::Optional<uint32_t> acked_bitrate_bps); |
84 // Updates the current remote rate estimate and returns true if a valid | 66 // Updates the current remote rate estimate and returns true if a valid |
85 // estimate exists. | 67 // estimate exists. |
86 bool UpdateEstimate(int64_t now_ms, | 68 bool UpdateEstimate(int64_t now_ms, |
87 rtc::Optional<uint32_t> acked_bitrate_bps, | 69 rtc::Optional<uint32_t> acked_bitrate_bps, |
88 bool overusing, | 70 bool overusing, |
89 uint32_t* target_bitrate_bps); | 71 uint32_t* target_bitrate_bps); |
90 | 72 |
91 rtc::ThreadChecker network_thread_; | 73 rtc::ThreadChecker network_thread_; |
92 RtcEventLog* const event_log_; | 74 RtcEventLog* const event_log_; |
93 const Clock* const clock_; | 75 const Clock* const clock_; |
94 std::unique_ptr<InterArrival> inter_arrival_; | 76 std::unique_ptr<InterArrival> inter_arrival_; |
95 std::unique_ptr<TrendlineEstimator> trendline_estimator_; | 77 std::unique_ptr<TrendlineEstimator> trendline_estimator_; |
96 OveruseDetector detector_; | 78 OveruseDetector detector_; |
97 BitrateEstimator receiver_incoming_bitrate_; | |
98 int64_t last_seen_packet_ms_; | 79 int64_t last_seen_packet_ms_; |
99 bool uma_recorded_; | 80 bool uma_recorded_; |
100 AimdRateControl rate_control_; | 81 AimdRateControl rate_control_; |
101 ProbeBitrateEstimator probe_bitrate_estimator_; | 82 ProbeBitrateEstimator probe_bitrate_estimator_; |
102 size_t trendline_window_size_; | 83 size_t trendline_window_size_; |
103 double trendline_smoothing_coeff_; | 84 double trendline_smoothing_coeff_; |
104 double trendline_threshold_gain_; | 85 double trendline_threshold_gain_; |
105 int consecutive_delayed_feedbacks_; | 86 int consecutive_delayed_feedbacks_; |
106 uint32_t last_logged_bitrate_; | 87 uint32_t last_logged_bitrate_; |
107 BandwidthUsage last_logged_state_; | 88 BandwidthUsage last_logged_state_; |
108 bool in_sparse_update_experiment_; | 89 bool in_sparse_update_experiment_; |
109 | 90 |
110 RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(DelayBasedBwe); | 91 RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(DelayBasedBwe); |
111 }; | 92 }; |
112 | 93 |
113 } // namespace webrtc | 94 } // namespace webrtc |
114 | 95 |
115 #endif // WEBRTC_MODULES_CONGESTION_CONTROLLER_DELAY_BASED_BWE_H_ | 96 #endif // WEBRTC_MODULES_CONGESTION_CONTROLLER_DELAY_BASED_BWE_H_ |
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