52200d0b7f
This includes if RTCP is received, but the number of packets received by the other end hasn't increased. Further, if no RTCP is received for more than 3 feedback intervals (3 seconds) we start reducing the estimate by 20%. This is put under an experiment. BUG=webrtc:6238 R=terelius@webrtc.org Review URL: https://codereview.webrtc.org/2262213002 . Cr-Commit-Position: refs/heads/master@{#14306}
106 lines
3.5 KiB
C++
106 lines
3.5 KiB
C++
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*
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* FEC and NACK added bitrate is handled outside class
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*/
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#ifndef WEBRTC_MODULES_BITRATE_CONTROLLER_SEND_SIDE_BANDWIDTH_ESTIMATION_H_
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#define WEBRTC_MODULES_BITRATE_CONTROLLER_SEND_SIDE_BANDWIDTH_ESTIMATION_H_
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#include <deque>
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#include <utility>
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#include <vector>
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#include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
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#include "webrtc/system_wrappers/include/critical_section_wrapper.h"
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namespace webrtc {
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class RtcEventLog;
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class SendSideBandwidthEstimation {
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public:
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SendSideBandwidthEstimation() = delete;
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explicit SendSideBandwidthEstimation(RtcEventLog* event_log);
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virtual ~SendSideBandwidthEstimation();
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void CurrentEstimate(int* bitrate, uint8_t* loss, int64_t* rtt) const;
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// Call periodically to update estimate.
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void UpdateEstimate(int64_t now_ms);
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// Call when we receive a RTCP message with TMMBR or REMB.
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void UpdateReceiverEstimate(int64_t now_ms, uint32_t bandwidth);
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// Call when a new delay-based estimate is available.
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void UpdateDelayBasedEstimate(int64_t now_ms, uint32_t bitrate_bps);
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// Call when we receive a RTCP message with a ReceiveBlock.
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void UpdateReceiverBlock(uint8_t fraction_loss,
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int64_t rtt,
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int number_of_packets,
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int64_t now_ms);
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void SetBitrates(int send_bitrate,
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int min_bitrate,
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int max_bitrate);
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void SetSendBitrate(int bitrate);
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void SetMinMaxBitrate(int min_bitrate, int max_bitrate);
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int GetMinBitrate() const;
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private:
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enum UmaState { kNoUpdate, kFirstDone, kDone };
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bool IsInStartPhase(int64_t now_ms) const;
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void UpdateUmaStats(int64_t now_ms, int64_t rtt, int lost_packets);
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// Returns the input bitrate capped to the thresholds defined by the max,
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// min and incoming bandwidth.
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uint32_t CapBitrateToThresholds(int64_t now_ms, uint32_t bitrate);
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// Updates history of min bitrates.
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// After this method returns min_bitrate_history_.front().second contains the
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// min bitrate used during last kBweIncreaseIntervalMs.
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void UpdateMinHistory(int64_t now_ms);
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std::deque<std::pair<int64_t, uint32_t> > min_bitrate_history_;
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// incoming filters
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int lost_packets_since_last_loss_update_Q8_;
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int expected_packets_since_last_loss_update_;
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uint32_t bitrate_;
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uint32_t min_bitrate_configured_;
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uint32_t max_bitrate_configured_;
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int64_t last_low_bitrate_log_ms_;
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bool has_decreased_since_last_fraction_loss_;
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int64_t last_feedback_ms_;
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int64_t last_packet_report_ms_;
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int64_t last_timeout_ms_;
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uint8_t last_fraction_loss_;
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uint8_t last_logged_fraction_loss_;
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int64_t last_round_trip_time_ms_;
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uint32_t bwe_incoming_;
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uint32_t delay_based_bitrate_bps_;
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int64_t time_last_decrease_ms_;
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int64_t first_report_time_ms_;
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int initially_lost_packets_;
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int bitrate_at_2_seconds_kbps_;
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UmaState uma_update_state_;
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std::vector<bool> rampup_uma_stats_updated_;
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RtcEventLog* event_log_;
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int64_t last_rtc_event_log_ms_;
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bool in_timeout_experiment_;
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_BITRATE_CONTROLLER_SEND_SIDE_BANDWIDTH_ESTIMATION_H_
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