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Adding direct congestion window pushback to encoders.

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When CongestionWindowPushback experiment is enabled, the pacer is oblivious to the congestion window. The relation between outstanding data and the congestion window affects encoder allocations directly.

Bug: None
Change-Id: Iaacc1d460d44a4ff2d586934c4f9ceb067109337
Reviewed-on: https://webrtc-review.googlesource.com/74922
Commit-Queue: Ying Wang <yinwa@webrtc.org>
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Christoffer Rodbro <crodbro@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23411}
This commit is contained in:
Ying Wang
2018-05-28 13:32:36 +02:00
committed by Commit Bot
parent 4e6cd5eaeb
commit 66eaed0393
3 changed files with 67 additions and 7 deletions
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8
modules/congestion_controller/goog_cc/goog_cc_network_control.cc
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@ -348,7 +348,13 @@ rtc::Optional<DataSize> GoogCcNetworkController::MaybeUpdateCongestionWindow() {
TimeDelta time_window =
TimeDelta::ms(*min_feedback_rtt_ms_ + accepted_queue_ms_);
DataSize data_window = last_bandwidth_ * time_window;
data_window = std::max(kMinCwnd, data_window);
if (current_data_window_) {
data_window =
std::max(kMinCwnd, (data_window + current_data_window_.value()) / 2);
} else {
data_window = std::max(kMinCwnd, data_window);
}
current_data_window_ = data_window;
RTC_LOG(LS_INFO) << "Feedback rtt: " << *min_feedback_rtt_ms_
<< " Bitrate: " << last_bandwidth_.bps();
return data_window;

2
modules/congestion_controller/goog_cc/goog_cc_network_control.h
View File

@ -89,6 +89,8 @@ class GoogCcNetworkController : public NetworkControllerInterface {
int64_t accepted_queue_ms_;
bool previously_in_alr = false;
rtc::Optional<DataSize> current_data_window_;
RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(GoogCcNetworkController);
};