45d9c1de9c
This adds the ability to the pacer to apply a congestion window by tracking sent data. This makes it more reliable when the congestion window is small enough to be filled at a high rate as there are less thread context switches that might affect the timing and performance. Outstanding data is not reduced by the pacer as it has no information about acknowledged packet feedback. This is by design as the pacer would also need to keep track of on which connection packets were sent or received, requiring a larger, more complex, change to the pacer. Bug: webrtc:8415 Change-Id: I4ecd303e835552ced042cd21186da910288a8258 Reviewed-on: https://webrtc-review.googlesource.com/51764 Reviewed-by: Philip Eliasson <philipel@webrtc.org> Commit-Queue: Sebastian Jansson <srte@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22371}
74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
/*
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* Copyright (c) 2018 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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#include "modules/congestion_controller/rtp/pacer_controller.h"
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#include "modules/congestion_controller/network_control/include/network_units.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/logging.h"
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namespace webrtc {
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namespace webrtc_cc {
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PacerController::PacerController(PacedSender* pacer) : pacer_(pacer) {
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sequenced_checker_.Detach();
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}
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PacerController::~PacerController() = default;
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void PacerController::OnCongestionWindow(CongestionWindow congestion_window) {
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RTC_DCHECK_CALLED_SEQUENTIALLY(&sequenced_checker_);
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if (congestion_window.enabled)
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pacer_->SetCongestionWindow(congestion_window.data_window.bytes());
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else
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pacer_->SetCongestionWindow(PacedSender::kNoCongestionWindow);
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}
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void PacerController::OnNetworkAvailability(NetworkAvailability msg) {
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RTC_DCHECK_CALLED_SEQUENTIALLY(&sequenced_checker_);
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network_available_ = msg.network_available;
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pacer_->UpdateOutstandingData(0);
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SetPacerState(!msg.network_available);
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}
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void PacerController::OnNetworkRouteChange(NetworkRouteChange) {
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RTC_DCHECK_CALLED_SEQUENTIALLY(&sequenced_checker_);
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pacer_->UpdateOutstandingData(0);
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}
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void PacerController::OnPacerConfig(PacerConfig msg) {
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RTC_DCHECK_CALLED_SEQUENTIALLY(&sequenced_checker_);
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DataRate pacing_rate = msg.data_window / msg.time_window;
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DataRate padding_rate = msg.pad_window / msg.time_window;
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pacer_->SetPacingRates(pacing_rate.bps(), padding_rate.bps());
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}
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void PacerController::OnProbeClusterConfig(ProbeClusterConfig config) {
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RTC_DCHECK_CALLED_SEQUENTIALLY(&sequenced_checker_);
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int64_t bitrate_bps = config.target_data_rate.bps();
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pacer_->CreateProbeCluster(bitrate_bps);
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}
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void PacerController::OnOutstandingData(OutstandingData msg) {
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RTC_DCHECK_CALLED_SEQUENTIALLY(&sequenced_checker_);
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pacer_->UpdateOutstandingData(msg.in_flight_data.bytes());
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}
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void PacerController::SetPacerState(bool paused) {
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if (paused && !pacer_paused_)
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pacer_->Pause();
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else if (!paused && pacer_paused_)
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pacer_->Resume();
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pacer_paused_ = paused;
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}
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} // namespace webrtc_cc
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} // namespace webrtc
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