zqz/platform-external-webrtc
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Using units in SendSideBandwidthEstimation.

Browse Source 
This CL moves SendSideBandwidthEstimation to use the unit types
DataRate, TimeDelta and Timestamp. This prepares for upcoming changes.

Bug: webrtc:9718
Change-Id: If10e329920dda037b53055ff3352ae7f8d7e32b8
Reviewed-on: https://webrtc-review.googlesource.com/c/104021
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25029}
This commit is contained in:
Sebastian Jansson
2018-10-05 19:56:03 +02:00
committed by Commit Bot
parent 9f80b97309
commit 35b5e5f3b0
10 changed files with 289 additions and 245 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
modules/bitrate_controller/BUILD.gn
View File

@ -44,6 +44,7 @@ rtc_static_library("bitrate_controller") {
"../rtp_rtcp",
"../rtp_rtcp:rtp_rtcp_format",
"//third_party/abseil-cpp/absl/memory",
"//third_party/abseil-cpp/absl/types:optional",
]
}

51
modules/bitrate_controller/bitrate_controller_impl.cc
View File

@ -20,7 +20,18 @@
#include "rtc_base/logging.h"
namespace webrtc {
namespace {
absl::optional<DataRate> ToOptionalDataRate(int start_bitrate_bps) {
if (start_bitrate_bps == -1)
return absl::nullopt;
return DataRate::bps(start_bitrate_bps);
}
DataRate MaxRate(int max_bitrate_bps) {
if (max_bitrate_bps == -1)
return DataRate::Infinity();
return DataRate::bps(max_bitrate_bps);
}
} // namespace
class BitrateControllerImpl::RtcpBandwidthObserverImpl
: public RtcpBandwidthObserver {
public:
@ -80,7 +91,9 @@ RtcpBandwidthObserver* BitrateControllerImpl::CreateRtcpBandwidthObserver() {
void BitrateControllerImpl::SetStartBitrate(int start_bitrate_bps) {
{
rtc::CritScope cs(&critsect_);
bandwidth_estimation_.SetSendBitrate(start_bitrate_bps);
bandwidth_estimation_.SetSendBitrate(
DataRate::bps(start_bitrate_bps),
Timestamp::ms(clock_->TimeInMilliseconds()));
}
MaybeTriggerOnNetworkChanged();
}
@ -89,7 +102,8 @@ void BitrateControllerImpl::SetMinMaxBitrate(int min_bitrate_bps,
int max_bitrate_bps) {
{
rtc::CritScope cs(&critsect_);
bandwidth_estimation_.SetMinMaxBitrate(min_bitrate_bps, max_bitrate_bps);
bandwidth_estimation_.SetMinMaxBitrate(DataRate::bps(min_bitrate_bps),
DataRate::bps(max_bitrate_bps));
}
MaybeTriggerOnNetworkChanged();
}
@ -99,8 +113,9 @@ void BitrateControllerImpl::SetBitrates(int start_bitrate_bps,
int max_bitrate_bps) {
{
rtc::CritScope cs(&critsect_);
bandwidth_estimation_.SetBitrates(start_bitrate_bps, min_bitrate_bps,
max_bitrate_bps);
bandwidth_estimation_.SetBitrates(
ToOptionalDataRate(start_bitrate_bps), DataRate::bps(min_bitrate_bps),
MaxRate(max_bitrate_bps), Timestamp::ms(clock_->TimeInMilliseconds()));
}
MaybeTriggerOnNetworkChanged();
}
@ -111,8 +126,9 @@ void BitrateControllerImpl::ResetBitrates(int bitrate_bps,
{
rtc::CritScope cs(&critsect_);
bandwidth_estimation_ = SendSideBandwidthEstimation(event_log_);
bandwidth_estimation_.SetBitrates(bitrate_bps, min_bitrate_bps,
max_bitrate_bps);
bandwidth_estimation_.SetBitrates(
ToOptionalDataRate(bitrate_bps), DataRate::bps(min_bitrate_bps),
MaxRate(max_bitrate_bps), Timestamp::ms(clock_->TimeInMilliseconds()));
}
MaybeTriggerOnNetworkChanged();
}
@ -121,8 +137,8 @@ void BitrateControllerImpl::ResetBitrates(int bitrate_bps,
void BitrateControllerImpl::OnReceivedEstimatedBitrate(uint32_t bitrate) {
{
rtc::CritScope cs(&critsect_);
bandwidth_estimation_.UpdateReceiverEstimate(clock_->TimeInMilliseconds(),
bitrate);
bandwidth_estimation_.UpdateReceiverEstimate(
Timestamp::ms(clock_->TimeInMilliseconds()), DataRate::bps(bitrate));
BWE_TEST_LOGGING_PLOT(1, "REMB_kbps", clock_->TimeInMilliseconds(),
bitrate / 1000);
}
@ -136,12 +152,15 @@ void BitrateControllerImpl::OnDelayBasedBweResult(
{
rtc::CritScope cs(&critsect_);
if (result.probe) {
bandwidth_estimation_.SetSendBitrate(result.target_bitrate_bps);
bandwidth_estimation_.SetSendBitrate(
DataRate::bps(result.target_bitrate_bps),
Timestamp::ms(clock_->TimeInMilliseconds()));
}
// Since SetSendBitrate now resets the delay-based estimate, we have to call
// UpdateDelayBasedEstimate after SetSendBitrate.
bandwidth_estimation_.UpdateDelayBasedEstimate(clock_->TimeInMilliseconds(),
result.target_bitrate_bps);
bandwidth_estimation_.UpdateDelayBasedEstimate(
Timestamp::ms(clock_->TimeInMilliseconds()),
DataRate::bps(result.target_bitrate_bps));
}
MaybeTriggerOnNetworkChanged();
}
@ -158,7 +177,8 @@ int64_t BitrateControllerImpl::TimeUntilNextProcess() {
void BitrateControllerImpl::Process() {
{
rtc::CritScope cs(&critsect_);
bandwidth_estimation_.UpdateEstimate(clock_->TimeInMilliseconds());
bandwidth_estimation_.UpdateEstimate(
Timestamp::ms(clock_->TimeInMilliseconds()));
}
MaybeTriggerOnNetworkChanged();
last_bitrate_update_ms_ = clock_->TimeInMilliseconds();
@ -213,8 +233,9 @@ void BitrateControllerImpl::OnReceivedRtcpReceiverReport(
RTC_DCHECK_GE(total_number_of_packets, 0);
bandwidth_estimation_.UpdateReceiverBlock(fraction_lost_aggregate, rtt,
total_number_of_packets, now_ms);
bandwidth_estimation_.UpdateReceiverBlock(
fraction_lost_aggregate, TimeDelta::ms(rtt), total_number_of_packets,
Timestamp::ms(now_ms));
}
MaybeTriggerOnNetworkChanged();
}

306
modules/bitrate_controller/send_side_bandwidth_estimation.cc
View File

@ -27,22 +27,22 @@
namespace webrtc {
namespace {
const int64_t kBweIncreaseIntervalMs = 1000;
const int64_t kBweDecreaseIntervalMs = 300;
const int64_t kStartPhaseMs = 2000;
const int64_t kBweConverganceTimeMs = 20000;
const int kLimitNumPackets = 20;
const int kDefaultMaxBitrateBps = 1000000000;
const int64_t kLowBitrateLogPeriodMs = 10000;
const int64_t kRtcEventLogPeriodMs = 5000;
constexpr TimeDelta kBweIncreaseInterval = TimeDelta::Millis<1000>();
constexpr TimeDelta kBweDecreaseInterval = TimeDelta::Millis<300>();
constexpr TimeDelta kStartPhase = TimeDelta::Millis<2000>();
constexpr TimeDelta kBweConverganceTime = TimeDelta::Millis<20000>();
constexpr int kLimitNumPackets = 20;
constexpr DataRate kDefaultMaxBitrate = DataRate::BitsPerSec<1000000000>();
constexpr TimeDelta kLowBitrateLogPeriod = TimeDelta::Millis<10000>();
constexpr TimeDelta kRtcEventLogPeriod = TimeDelta::Millis<5000>();
// Expecting that RTCP feedback is sent uniformly within [0.5, 1.5]s intervals.
const int64_t kFeedbackIntervalMs = 5000;
const int64_t kFeedbackTimeoutIntervals = 3;
const int64_t kTimeoutIntervalMs = 1000;
constexpr TimeDelta kMaxRtcpFeedbackInterval = TimeDelta::Millis<5000>();
constexpr int kFeedbackTimeoutIntervals = 3;
constexpr TimeDelta kTimeoutInterval = TimeDelta::Millis<1000>();
const float kDefaultLowLossThreshold = 0.02f;
const float kDefaultHighLossThreshold = 0.1f;
const int kDefaultBitrateThresholdKbps = 0;
constexpr float kDefaultLowLossThreshold = 0.02f;
constexpr float kDefaultHighLossThreshold = 0.1f;
constexpr DataRate kDefaultBitrateThreshold = DataRate::Zero();
struct UmaRampUpMetric {
const char* metric_name;
@ -99,7 +99,7 @@ bool ReadBweLossExperimentParameters(float* low_loss_threshold,
"experiment from field trial string. Using default.";
*low_loss_threshold = kDefaultLowLossThreshold;
*high_loss_threshold = kDefaultHighLossThreshold;
*bitrate_threshold_kbps = kDefaultBitrateThresholdKbps;
*bitrate_threshold_kbps = kDefaultBitrateThreshold.kbps();
return false;
}
} // namespace
@ -107,33 +107,34 @@ bool ReadBweLossExperimentParameters(float* low_loss_threshold,
SendSideBandwidthEstimation::SendSideBandwidthEstimation(RtcEventLog* event_log)
: lost_packets_since_last_loss_update_(0),
expected_packets_since_last_loss_update_(0),
current_bitrate_bps_(0),
min_bitrate_configured_(congestion_controller::GetMinBitrateBps()),
max_bitrate_configured_(kDefaultMaxBitrateBps),
last_low_bitrate_log_ms_(-1),
current_bitrate_(DataRate::Zero()),
min_bitrate_configured_(
DataRate::bps(congestion_controller::GetMinBitrateBps())),
max_bitrate_configured_(kDefaultMaxBitrate),
last_low_bitrate_log_(Timestamp::MinusInfinity()),
has_decreased_since_last_fraction_loss_(false),
last_feedback_ms_(-1),
last_packet_report_ms_(-1),
last_timeout_ms_(-1),
last_loss_feedback_(Timestamp::MinusInfinity()),
last_loss_packet_report_(Timestamp::MinusInfinity()),
last_timeout_(Timestamp::MinusInfinity()),
last_fraction_loss_(0),
last_logged_fraction_loss_(0),
last_round_trip_time_ms_(0),
bwe_incoming_(0),
delay_based_bitrate_bps_(0),
time_last_decrease_ms_(0),
first_report_time_ms_(-1),
last_round_trip_time_(TimeDelta::Zero()),
bwe_incoming_(DataRate::Zero()),
delay_based_bitrate_(DataRate::Zero()),
time_last_decrease_(Timestamp::MinusInfinity()),
first_report_time_(Timestamp::MinusInfinity()),
initially_lost_packets_(0),
bitrate_at_2_seconds_kbps_(0),
bitrate_at_2_seconds_(DataRate::Zero()),
uma_update_state_(kNoUpdate),
uma_rtt_state_(kNoUpdate),
rampup_uma_stats_updated_(kNumUmaRampupMetrics, false),
event_log_(event_log),
last_rtc_event_log_ms_(-1),
last_rtc_event_log_(Timestamp::MinusInfinity()),
in_timeout_experiment_(
webrtc::field_trial::IsEnabled("WebRTC-FeedbackTimeout")),
low_loss_threshold_(kDefaultLowLossThreshold),
high_loss_threshold_(kDefaultHighLossThreshold),
bitrate_threshold_bps_(1000 * kDefaultBitrateThresholdKbps) {
bitrate_threshold_(kDefaultBitrateThreshold) {
RTC_DCHECK(event_log);
if (BweLossExperimentIsEnabled()) {
uint32_t bitrate_threshold_kbps;
@ -143,87 +144,87 @@ SendSideBandwidthEstimation::SendSideBandwidthEstimation(RtcEventLog* event_log)
RTC_LOG(LS_INFO) << "Enabled BweLossExperiment with parameters "
<< low_loss_threshold_ << ", " << high_loss_threshold_
<< ", " << bitrate_threshold_kbps;
bitrate_threshold_bps_ = bitrate_threshold_kbps * 1000;
bitrate_threshold_ = DataRate::kbps(bitrate_threshold_kbps);
}
}
}
SendSideBandwidthEstimation::~SendSideBandwidthEstimation() {}
void SendSideBandwidthEstimation::SetBitrates(int send_bitrate,
int min_bitrate,
int max_bitrate) {
void SendSideBandwidthEstimation::SetBitrates(
absl::optional<DataRate> send_bitrate,
DataRate min_bitrate,
DataRate max_bitrate,
Timestamp at_time) {
SetMinMaxBitrate(min_bitrate, max_bitrate);
if (send_bitrate > 0)
SetSendBitrate(send_bitrate);
if (send_bitrate)
SetSendBitrate(*send_bitrate, at_time);
}
void SendSideBandwidthEstimation::SetSendBitrate(int bitrate) {
RTC_DCHECK_GT(bitrate, 0);
delay_based_bitrate_bps_ = 0; // Reset to avoid being capped by the estimate.
CapBitrateToThresholds(Clock::GetRealTimeClock()->TimeInMilliseconds(),
bitrate);
void SendSideBandwidthEstimation::SetSendBitrate(DataRate bitrate,
Timestamp at_time) {
RTC_DCHECK(bitrate > DataRate::Zero());
// Reset to avoid being capped by the estimate.
delay_based_bitrate_ = DataRate::Zero();
CapBitrateToThresholds(at_time, bitrate);
// Clear last sent bitrate history so the new value can be used directly
// and not capped.
min_bitrate_history_.clear();
}
void SendSideBandwidthEstimation::SetMinMaxBitrate(int min_bitrate,
int max_bitrate) {
RTC_DCHECK_GE(min_bitrate, 0);
void SendSideBandwidthEstimation::SetMinMaxBitrate(DataRate min_bitrate,
DataRate max_bitrate) {
min_bitrate_configured_ =
std::max(min_bitrate, congestion_controller::GetMinBitrateBps());
if (max_bitrate > 0) {
max_bitrate_configured_ =
std::max<uint32_t>(min_bitrate_configured_, max_bitrate);
std::max(min_bitrate, congestion_controller::GetMinBitrate());
if (max_bitrate > DataRate::Zero() && max_bitrate.IsFinite()) {
max_bitrate_configured_ = std::max(min_bitrate_configured_, max_bitrate);
} else {
max_bitrate_configured_ = kDefaultMaxBitrateBps;
max_bitrate_configured_ = kDefaultMaxBitrate;
}
}
int SendSideBandwidthEstimation::GetMinBitrate() const {
return min_bitrate_configured_;
return min_bitrate_configured_.bps<int>();
}
void SendSideBandwidthEstimation::CurrentEstimate(int* bitrate,
uint8_t* loss,
int64_t* rtt) const {
*bitrate = current_bitrate_bps_;
*bitrate = current_bitrate_.bps<int>();
*loss = last_fraction_loss_;
*rtt = last_round_trip_time_ms_;
*rtt = last_round_trip_time_.ms<int64_t>();
}
void SendSideBandwidthEstimation::UpdateReceiverEstimate(int64_t now_ms,
uint32_t bandwidth) {
void SendSideBandwidthEstimation::UpdateReceiverEstimate(Timestamp at_time,
DataRate bandwidth) {
bwe_incoming_ = bandwidth;
CapBitrateToThresholds(now_ms, current_bitrate_bps_);
CapBitrateToThresholds(at_time, current_bitrate_);
}
void SendSideBandwidthEstimation::UpdateDelayBasedEstimate(
int64_t now_ms,
uint32_t bitrate_bps) {
delay_based_bitrate_bps_ = bitrate_bps;
CapBitrateToThresholds(now_ms, current_bitrate_bps_);
void SendSideBandwidthEstimation::UpdateDelayBasedEstimate(Timestamp at_time,
DataRate bitrate) {
delay_based_bitrate_ = bitrate;
CapBitrateToThresholds(at_time, current_bitrate_);
}
void SendSideBandwidthEstimation::UpdateReceiverBlock(uint8_t fraction_loss,
int64_t rtt_ms,
TimeDelta rtt,
int number_of_packets,
int64_t now_ms) {
Timestamp at_time) {
const int kRoundingConstant = 128;
int packets_lost = (static_cast<int>(fraction_loss) * number_of_packets +
kRoundingConstant) >>
8;
UpdatePacketsLost(packets_lost, number_of_packets, now_ms);
UpdateRtt(rtt_ms, now_ms);
UpdatePacketsLost(packets_lost, number_of_packets, at_time);
UpdateRtt(rtt, at_time);
}
void SendSideBandwidthEstimation::UpdatePacketsLost(int packets_lost,
int number_of_packets,
int64_t now_ms) {
last_feedback_ms_ = now_ms;
if (first_report_time_ms_ == -1)
first_report_time_ms_ = now_ms;
Timestamp at_time) {
last_loss_feedback_ = at_time;
if (first_report_time_.IsInfinite())
first_report_time_ = at_time;
// Check sequence number diff and weight loss report
if (number_of_packets > 0) {
@ -244,202 +245,201 @@ void SendSideBandwidthEstimation::UpdatePacketsLost(int packets_lost,
lost_packets_since_last_loss_update_ = 0;
expected_packets_since_last_loss_update_ = 0;
last_packet_report_ms_ = now_ms;
UpdateEstimate(now_ms);
last_loss_packet_report_ = at_time;
UpdateEstimate(at_time);
}
UpdateUmaStatsPacketsLost(now_ms, packets_lost);
UpdateUmaStatsPacketsLost(at_time, packets_lost);
}
void SendSideBandwidthEstimation::UpdateUmaStatsPacketsLost(int64_t now_ms,
void SendSideBandwidthEstimation::UpdateUmaStatsPacketsLost(Timestamp at_time,
int packets_lost) {
int bitrate_kbps = static_cast<int>((current_bitrate_bps_ + 500) / 1000);
DataRate bitrate_kbps = DataRate::kbps((current_bitrate_.bps() + 500) / 1000);
for (size_t i = 0; i < kNumUmaRampupMetrics; ++i) {
if (!rampup_uma_stats_updated_[i] &&
bitrate_kbps >= kUmaRampupMetrics[i].bitrate_kbps) {
bitrate_kbps.kbps() >= kUmaRampupMetrics[i].bitrate_kbps) {
RTC_HISTOGRAMS_COUNTS_100000(i, kUmaRampupMetrics[i].metric_name,
now_ms - first_report_time_ms_);
(at_time - first_report_time_).ms());
rampup_uma_stats_updated_[i] = true;
}
}
if (IsInStartPhase(now_ms)) {
if (IsInStartPhase(at_time)) {
initially_lost_packets_ += packets_lost;
} else if (uma_update_state_ == kNoUpdate) {
uma_update_state_ = kFirstDone;
bitrate_at_2_seconds_kbps_ = bitrate_kbps;
bitrate_at_2_seconds_ = bitrate_kbps;
RTC_HISTOGRAM_COUNTS("WebRTC.BWE.InitiallyLostPackets",
initially_lost_packets_, 0, 100, 50);
RTC_HISTOGRAM_COUNTS("WebRTC.BWE.InitialBandwidthEstimate",
bitrate_at_2_seconds_kbps_, 0, 2000, 50);
bitrate_at_2_seconds_.kbps(), 0, 2000, 50);
} else if (uma_update_state_ == kFirstDone &&
now_ms - first_report_time_ms_ >= kBweConverganceTimeMs) {
at_time - first_report_time_ >= kBweConverganceTime) {
uma_update_state_ = kDone;
int bitrate_diff_kbps =
std::max(bitrate_at_2_seconds_kbps_ - bitrate_kbps, 0);
int bitrate_diff_kbps = std::max(
bitrate_at_2_seconds_.kbps<int>() - bitrate_kbps.kbps<int>(), 0);
RTC_HISTOGRAM_COUNTS("WebRTC.BWE.InitialVsConvergedDiff", bitrate_diff_kbps,
0, 2000, 50);
}
}
void SendSideBandwidthEstimation::UpdateRtt(int64_t rtt_ms, int64_t now_ms) {
void SendSideBandwidthEstimation::UpdateRtt(TimeDelta rtt, Timestamp at_time) {
// Update RTT if we were able to compute an RTT based on this RTCP.
// FlexFEC doesn't send RTCP SR, which means we won't be able to compute RTT.
if (rtt_ms > 0)
last_round_trip_time_ms_ = rtt_ms;
if (rtt > TimeDelta::Zero())
last_round_trip_time_ = rtt;
if (!IsInStartPhase(now_ms) && uma_rtt_state_ == kNoUpdate) {
if (!IsInStartPhase(at_time) && uma_rtt_state_ == kNoUpdate) {
uma_rtt_state_ = kDone;
RTC_HISTOGRAM_COUNTS("WebRTC.BWE.InitialRtt", static_cast<int>(rtt_ms), 0,
2000, 50);
RTC_HISTOGRAM_COUNTS("WebRTC.BWE.InitialRtt", rtt.ms<int>(), 0, 2000, 50);
}
}
void SendSideBandwidthEstimation::UpdateEstimate(int64_t now_ms) {
uint32_t new_bitrate = current_bitrate_bps_;
void SendSideBandwidthEstimation::UpdateEstimate(Timestamp at_time) {
DataRate new_bitrate = current_bitrate_;
// We trust the REMB and/or delay-based estimate during the first 2 seconds if
// we haven't had any packet loss reported, to allow startup bitrate probing.
if (last_fraction_loss_ == 0 && IsInStartPhase(now_ms)) {
if (last_fraction_loss_ == 0 && IsInStartPhase(at_time)) {
new_bitrate = std::max(bwe_incoming_, new_bitrate);
new_bitrate = std::max(delay_based_bitrate_bps_, new_bitrate);
new_bitrate = std::max(delay_based_bitrate_, new_bitrate);
if (new_bitrate != current_bitrate_bps_) {
if (new_bitrate != current_bitrate_) {
min_bitrate_history_.clear();
min_bitrate_history_.push_back(
std::make_pair(now_ms, current_bitrate_bps_));
CapBitrateToThresholds(now_ms, new_bitrate);
min_bitrate_history_.push_back(std::make_pair(at_time, current_bitrate_));
CapBitrateToThresholds(at_time, new_bitrate);
return;
}
}
UpdateMinHistory(now_ms);
if (last_packet_report_ms_ == -1) {
UpdateMinHistory(at_time);
if (last_loss_packet_report_.IsInfinite()) {
// No feedback received.
CapBitrateToThresholds(now_ms, current_bitrate_bps_);
CapBitrateToThresholds(at_time, current_bitrate_);
return;
}
int64_t time_since_packet_report_ms = now_ms - last_packet_report_ms_;
int64_t time_since_feedback_ms = now_ms - last_feedback_ms_;
if (time_since_packet_report_ms < 1.2 * kFeedbackIntervalMs) {
TimeDelta time_since_loss_packet_report = at_time - last_loss_packet_report_;
TimeDelta time_since_loss_feedback = at_time - last_loss_feedback_;
if (time_since_loss_packet_report < 1.2 * kMaxRtcpFeedbackInterval) {
// We only care about loss above a given bitrate threshold.
float loss = last_fraction_loss_ / 256.0f;
// We only make decisions based on loss when the bitrate is above a
// threshold. This is a crude way of handling loss which is uncorrelated
// to congestion.
if (current_bitrate_bps_ < bitrate_threshold_bps_ ||
loss <= low_loss_threshold_) {
if (current_bitrate_ < bitrate_threshold_ || loss <= low_loss_threshold_) {
// Loss < 2%: Increase rate by 8% of the min bitrate in the last
// kBweIncreaseIntervalMs.
// kBweIncreaseInterval.
// Note that by remembering the bitrate over the last second one can
// rampup up one second faster than if only allowed to start ramping
// at 8% per second rate now. E.g.:
// If sending a constant 100kbps it can rampup immediatly to 108kbps
// whenever a receiver report is received with lower packet loss.
// If instead one would do: current_bitrate_bps_ *= 1.08^(delta time),
// If instead one would do: current_bitrate_ *= 1.08^(delta time),
// it would take over one second since the lower packet loss to achieve
// 108kbps.
new_bitrate = static_cast<uint32_t>(
min_bitrate_history_.front().second * 1.08 + 0.5);
new_bitrate =
DataRate::bps(min_bitrate_history_.front().second.bps() * 1.08 + 0.5);
// Add 1 kbps extra, just to make sure that we do not get stuck
// (gives a little extra increase at low rates, negligible at higher
// rates).
new_bitrate += 1000;
} else if (current_bitrate_bps_ > bitrate_threshold_bps_) {
new_bitrate += DataRate::bps(1000);
} else if (current_bitrate_ > bitrate_threshold_) {
if (loss <= high_loss_threshold_) {
// Loss between 2% - 10%: Do nothing.
} else {
// Loss > 10%: Limit the rate decreases to once a kBweDecreaseIntervalMs
// Loss > 10%: Limit the rate decreases to once a kBweDecreaseInterval
// + rtt.
if (!has_decreased_since_last_fraction_loss_ &&
(now_ms - time_last_decrease_ms_) >=
(kBweDecreaseIntervalMs + last_round_trip_time_ms_)) {
time_last_decrease_ms_ = now_ms;
(at_time - time_last_decrease_) >=
(kBweDecreaseInterval + last_round_trip_time_)) {
time_last_decrease_ = at_time;
// Reduce rate:
// newRate = rate * (1 - 0.5*lossRate);
// where packetLoss = 256*lossRate;
new_bitrate = static_cast<uint32_t>(
(current_bitrate_bps_ *
new_bitrate =
DataRate::bps((current_bitrate_.bps() *
static_cast<double>(512 - last_fraction_loss_)) /
512.0);
has_decreased_since_last_fraction_loss_ = true;
}
}
}
} else if (time_since_feedback_ms >
kFeedbackTimeoutIntervals * kFeedbackIntervalMs &&
(last_timeout_ms_ == -1 ||
now_ms - last_timeout_ms_ > kTimeoutIntervalMs)) {
} else if (time_since_loss_feedback >
kFeedbackTimeoutIntervals * kMaxRtcpFeedbackInterval &&
(last_timeout_.IsInfinite() ||
at_time - last_timeout_ > kTimeoutInterval)) {
if (in_timeout_experiment_) {
RTC_LOG(LS_WARNING) << "Feedback timed out (" << time_since_feedback_ms
<< " ms), reducing bitrate.";
new_bitrate *= 0.8;
RTC_LOG(LS_WARNING) << "Feedback timed out ("
<< ToString(time_since_loss_feedback)
<< "), reducing bitrate.";
new_bitrate = new_bitrate * 0.8;
// Reset accumulators since we've already acted on missing feedback and
// shouldn't to act again on these old lost packets.
lost_packets_since_last_loss_update_ = 0;
expected_packets_since_last_loss_update_ = 0;
last_timeout_ms_ = now_ms;
last_timeout_ = at_time;
}
}
CapBitrateToThresholds(now_ms, new_bitrate);
CapBitrateToThresholds(at_time, new_bitrate);
}
bool SendSideBandwidthEstimation::IsInStartPhase(int64_t now_ms) const {
return first_report_time_ms_ == -1 ||
now_ms - first_report_time_ms_ < kStartPhaseMs;
bool SendSideBandwidthEstimation::IsInStartPhase(Timestamp at_time) const {
return first_report_time_.IsInfinite() ||
at_time - first_report_time_ < kStartPhase;
}
void SendSideBandwidthEstimation::UpdateMinHistory(int64_t now_ms) {
void SendSideBandwidthEstimation::UpdateMinHistory(Timestamp at_time) {
// Remove old data points from history.
// Since history precision is in ms, add one so it is able to increase
// bitrate if it is off by as little as 0.5ms.
while (!min_bitrate_history_.empty() &&
now_ms - min_bitrate_history_.front().first + 1 >
kBweIncreaseIntervalMs) {
at_time - min_bitrate_history_.front().first + TimeDelta::ms(1) >
kBweIncreaseInterval) {
min_bitrate_history_.pop_front();
}
// Typical minimum sliding-window algorithm: Pop values higher than current
// bitrate before pushing it.
while (!min_bitrate_history_.empty() &&
current_bitrate_bps_ <= min_bitrate_history_.back().second) {
current_bitrate_ <= min_bitrate_history_.back().second) {
min_bitrate_history_.pop_back();
}
min_bitrate_history_.push_back(std::make_pair(now_ms, current_bitrate_bps_));
min_bitrate_history_.push_back(std::make_pair(at_time, current_bitrate_));
}
void SendSideBandwidthEstimation::CapBitrateToThresholds(int64_t now_ms,
uint32_t bitrate_bps) {
if (bwe_incoming_ > 0 && bitrate_bps > bwe_incoming_) {
bitrate_bps = bwe_incoming_;
void SendSideBandwidthEstimation::CapBitrateToThresholds(Timestamp at_time,
DataRate bitrate) {
if (bwe_incoming_ > DataRate::Zero() && bitrate > bwe_incoming_) {
bitrate = bwe_incoming_;
}
if (delay_based_bitrate_bps_ > 0 && bitrate_bps > delay_based_bitrate_bps_) {
bitrate_bps = delay_based_bitrate_bps_;
if (delay_based_bitrate_ > DataRate::Zero() &&
bitrate > delay_based_bitrate_) {
bitrate = delay_based_bitrate_;
}
if (bitrate_bps > max_bitrate_configured_) {
bitrate_bps = max_bitrate_configured_;
if (bitrate > max_bitrate_configured_) {
bitrate = max_bitrate_configured_;
}
if (bitrate_bps < min_bitrate_configured_) {
if (last_low_bitrate_log_ms_ == -1 ||
now_ms - last_low_bitrate_log_ms_ > kLowBitrateLogPeriodMs) {
if (bitrate < min_bitrate_configured_) {
if (last_low_bitrate_log_.IsInfinite() ||
at_time - last_low_bitrate_log_ > kLowBitrateLogPeriod) {
RTC_LOG(LS_WARNING) << "Estimated available bandwidth "
<< bitrate_bps / 1000
<< " kbps is below configured min bitrate "
<< min_bitrate_configured_ / 1000 << " kbps.";
last_low_bitrate_log_ms_ = now_ms;
<< ToString(bitrate)
<< " is below configured min bitrate "
<< ToString(min_bitrate_configured_) << ".";
last_low_bitrate_log_ = at_time;
}
bitrate_bps = min_bitrate_configured_;
bitrate = min_bitrate_configured_;
}
if (bitrate_bps != current_bitrate_bps_ ||
if (bitrate != current_bitrate_ ||
last_fraction_loss_ != last_logged_fraction_loss_ ||
now_ms - last_rtc_event_log_ms_ > kRtcEventLogPeriodMs) {
at_time - last_rtc_event_log_ > kRtcEventLogPeriod) {
event_log_->Log(absl::make_unique<RtcEventBweUpdateLossBased>(
bitrate_bps, last_fraction_loss_,
bitrate.bps(), last_fraction_loss_,
expected_packets_since_last_loss_update_));
last_logged_fraction_loss_ = last_fraction_loss_;
last_rtc_event_log_ms_ = now_ms;
last_rtc_event_log_ = at_time;
}
current_bitrate_bps_ = bitrate_bps;
current_bitrate_ = bitrate;
}
} // namespace webrtc

68
modules/bitrate_controller/send_side_bandwidth_estimation.h
View File

@ -17,6 +17,7 @@
#include <utility>
#include <vector>
#include "absl/types/optional.h"
#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
namespace webrtc {
@ -32,83 +33,86 @@ class SendSideBandwidthEstimation {
void CurrentEstimate(int* bitrate, uint8_t* loss, int64_t* rtt) const;
// Call periodically to update estimate.
void UpdateEstimate(int64_t now_ms);
void UpdateEstimate(Timestamp at_time);
// Call when we receive a RTCP message with TMMBR or REMB.
void UpdateReceiverEstimate(int64_t now_ms, uint32_t bandwidth);
void UpdateReceiverEstimate(Timestamp at_time, DataRate bandwidth);
// Call when a new delay-based estimate is available.
void UpdateDelayBasedEstimate(int64_t now_ms, uint32_t bitrate_bps);
void UpdateDelayBasedEstimate(Timestamp at_time, DataRate bitrate);
// Call when we receive a RTCP message with a ReceiveBlock.
void UpdateReceiverBlock(uint8_t fraction_loss,
int64_t rtt_ms,
TimeDelta rtt_ms,
int number_of_packets,
int64_t now_ms);
Timestamp at_time);
// Call when we receive a RTCP message with a ReceiveBlock.
void UpdatePacketsLost(int packets_lost,
int number_of_packets,
int64_t now_ms);
Timestamp at_time);
// Call when we receive a RTCP message with a ReceiveBlock.
void UpdateRtt(int64_t rtt, int64_t now_ms);
void UpdateRtt(TimeDelta rtt, Timestamp at_time);
void SetBitrates(int send_bitrate, int min_bitrate, int max_bitrate);
void SetSendBitrate(int bitrate);
void SetMinMaxBitrate(int min_bitrate, int max_bitrate);
void SetBitrates(absl::optional<DataRate> send_bitrate,
DataRate min_bitrate,
DataRate max_bitrate,
Timestamp at_time);
void SetSendBitrate(DataRate bitrate, Timestamp at_time);
void SetMinMaxBitrate(DataRate min_bitrate, DataRate max_bitrate);
int GetMinBitrate() const;
private:
enum UmaState { kNoUpdate, kFirstDone, kDone };
bool IsInStartPhase(int64_t now_ms) const;
bool IsInStartPhase(Timestamp at_time) const;
void UpdateUmaStatsPacketsLost(int64_t now_ms, int packets_lost);
void UpdateUmaStatsPacketsLost(Timestamp at_time, int packets_lost);
// Updates history of min bitrates.
// After this method returns min_bitrate_history_.front().second contains the
// min bitrate used during last kBweIncreaseIntervalMs.
void UpdateMinHistory(int64_t now_ms);
void UpdateMinHistory(Timestamp at_time);
// Cap |bitrate_bps| to [min_bitrate_configured_, max_bitrate_configured_] and
// set |current_bitrate_bps_| to the capped value and updates the event log.
void CapBitrateToThresholds(int64_t now_ms, uint32_t bitrate_bps);
// Cap |bitrate| to [min_bitrate_configured_, max_bitrate_configured_] and
// set |current_bitrate_| to the capped value and updates the event log.
void CapBitrateToThresholds(Timestamp at_time, DataRate bitrate);
std::deque<std::pair<int64_t, uint32_t> > min_bitrate_history_;
std::deque<std::pair<Timestamp, DataRate> > min_bitrate_history_;
// incoming filters
int lost_packets_since_last_loss_update_;
int expected_packets_since_last_loss_update_;
uint32_t current_bitrate_bps_;
uint32_t min_bitrate_configured_;
uint32_t max_bitrate_configured_;
int64_t last_low_bitrate_log_ms_;
DataRate current_bitrate_;
DataRate min_bitrate_configured_;
DataRate max_bitrate_configured_;
Timestamp last_low_bitrate_log_;
bool has_decreased_since_last_fraction_loss_;
int64_t last_feedback_ms_;
int64_t last_packet_report_ms_;
int64_t last_timeout_ms_;
Timestamp last_loss_feedback_;
Timestamp last_loss_packet_report_;
Timestamp last_timeout_;
uint8_t last_fraction_loss_;
uint8_t last_logged_fraction_loss_;
int64_t last_round_trip_time_ms_;
TimeDelta last_round_trip_time_;
uint32_t bwe_incoming_;
uint32_t delay_based_bitrate_bps_;
int64_t time_last_decrease_ms_;
int64_t first_report_time_ms_;
DataRate bwe_incoming_;
DataRate delay_based_bitrate_;
Timestamp time_last_decrease_;
Timestamp first_report_time_;
int initially_lost_packets_;
int bitrate_at_2_seconds_kbps_;
DataRate bitrate_at_2_seconds_;
UmaState uma_update_state_;
UmaState uma_rtt_state_;
std::vector<bool> rampup_uma_stats_updated_;
RtcEventLog* event_log_;
int64_t last_rtc_event_log_ms_;
Timestamp last_rtc_event_log_;
bool in_timeout_experiment_;
float low_loss_threshold_;
float high_loss_threshold_;
uint32_t bitrate_threshold_bps_;
DataRate bitrate_threshold_;
};
} // namespace webrtc
#endif // MODULES_BITRATE_CONTROLLER_SEND_SIDE_BANDWIDTH_ESTIMATION_H_

53
modules/bitrate_controller/send_side_bandwidth_estimation_unittest.cc
View File

@ -35,24 +35,25 @@ MATCHER(LossBasedBweUpdateWithBitrateAndLossFraction, "") {
}
void TestProbing(bool use_delay_based) {
MockRtcEventLog event_log;
testing::NiceMock<MockRtcEventLog> event_log;
SendSideBandwidthEstimation bwe(&event_log);
bwe.SetMinMaxBitrate(100000, 1500000);
bwe.SetSendBitrate(200000);
int64_t now_ms = 0;
bwe.SetMinMaxBitrate(DataRate::bps(100000), DataRate::bps(1500000));
bwe.SetSendBitrate(DataRate::bps(200000), Timestamp::ms(now_ms));
const int kRembBps = 1000000;
const int kSecondRembBps = kRembBps + 500000;
int64_t now_ms = 0;
bwe.UpdateReceiverBlock(0, 50, 1, now_ms);
bwe.UpdateReceiverBlock(0, TimeDelta::ms(50), 1, Timestamp::ms(now_ms));
// Initial REMB applies immediately.
if (use_delay_based) {
bwe.UpdateDelayBasedEstimate(now_ms, kRembBps);
bwe.UpdateDelayBasedEstimate(Timestamp::ms(now_ms),
DataRate::bps(kRembBps));
} else {
bwe.UpdateReceiverEstimate(now_ms, kRembBps);
bwe.UpdateReceiverEstimate(Timestamp::ms(now_ms), DataRate::bps(kRembBps));
}
bwe.UpdateEstimate(now_ms);
bwe.UpdateEstimate(Timestamp::ms(now_ms));
int bitrate;
uint8_t fraction_loss;
int64_t rtt;
@ -62,11 +63,13 @@ void TestProbing(bool use_delay_based) {
// Second REMB doesn't apply immediately.
now_ms += 2001;
if (use_delay_based) {
bwe.UpdateDelayBasedEstimate(now_ms, kSecondRembBps);
bwe.UpdateDelayBasedEstimate(Timestamp::ms(now_ms),
DataRate::bps(kSecondRembBps));
} else {
bwe.UpdateReceiverEstimate(now_ms, kSecondRembBps);
bwe.UpdateReceiverEstimate(Timestamp::ms(now_ms),
DataRate::bps(kSecondRembBps));
}
bwe.UpdateEstimate(now_ms);
bwe.UpdateEstimate(Timestamp::ms(now_ms));
bitrate = 0;
bwe.CurrentEstimate(&bitrate, &fraction_loss, &rtt);
EXPECT_EQ(kRembBps, bitrate);
@ -86,17 +89,18 @@ TEST(SendSideBweTest, DoesntReapplyBitrateDecreaseWithoutFollowingRemb) {
.Times(1);
EXPECT_CALL(event_log,
LogProxy(LossBasedBweUpdateWithBitrateAndLossFraction()))
.Times(2);
.Times(1);
SendSideBandwidthEstimation bwe(&event_log);
static const int kMinBitrateBps = 100000;
static const int kInitialBitrateBps = 1000000;
bwe.SetMinMaxBitrate(kMinBitrateBps, 1500000);
bwe.SetSendBitrate(kInitialBitrateBps);
int64_t now_ms = 1000;
bwe.SetMinMaxBitrate(DataRate::bps(kMinBitrateBps), DataRate::bps(1500000));
bwe.SetSendBitrate(DataRate::bps(kInitialBitrateBps), Timestamp::ms(now_ms));
static const uint8_t kFractionLoss = 128;
static const int64_t kRttMs = 50;
now_ms += 10000;
int64_t now_ms = 0;
int bitrate_bps;
uint8_t fraction_loss;
int64_t rtt_ms;
@ -106,10 +110,11 @@ TEST(SendSideBweTest, DoesntReapplyBitrateDecreaseWithoutFollowingRemb) {
EXPECT_EQ(0, rtt_ms);
// Signal heavy loss to go down in bitrate.
bwe.UpdateReceiverBlock(kFractionLoss, kRttMs, 100, now_ms);
bwe.UpdateReceiverBlock(kFractionLoss, TimeDelta::ms(kRttMs), 100,
Timestamp::ms(now_ms));
// Trigger an update 2 seconds later to not be rate limited.
now_ms += 1000;
bwe.UpdateEstimate(now_ms);
bwe.UpdateEstimate(Timestamp::ms(now_ms));
bwe.CurrentEstimate(&bitrate_bps, &fraction_loss, &rtt_ms);
EXPECT_LT(bitrate_bps, kInitialBitrateBps);
@ -127,7 +132,7 @@ TEST(SendSideBweTest, DoesntReapplyBitrateDecreaseWithoutFollowingRemb) {
// Trigger an update 2 seconds later to not be rate limited (but it still
// shouldn't update).
now_ms += 1000;
bwe.UpdateEstimate(now_ms);
bwe.UpdateEstimate(Timestamp::ms(now_ms));
bwe.CurrentEstimate(&bitrate_bps, &fraction_loss, &rtt_ms);
EXPECT_EQ(last_bitrate_bps, bitrate_bps);
@ -150,16 +155,18 @@ TEST(SendSideBweTest, SettingSendBitrateOverridesDelayBasedEstimate) {
uint8_t fraction_loss;
int64_t rtt_ms;
bwe.SetMinMaxBitrate(kMinBitrateBps, kMaxBitrateBps);
bwe.SetSendBitrate(kInitialBitrateBps);
bwe.SetMinMaxBitrate(DataRate::bps(kMinBitrateBps),
DataRate::bps(kMaxBitrateBps));
bwe.SetSendBitrate(DataRate::bps(kInitialBitrateBps), Timestamp::ms(now_ms));
bwe.UpdateDelayBasedEstimate(now_ms, kDelayBasedBitrateBps);
bwe.UpdateEstimate(now_ms);
bwe.UpdateDelayBasedEstimate(Timestamp::ms(now_ms),
DataRate::bps(kDelayBasedBitrateBps));
bwe.UpdateEstimate(Timestamp::ms(now_ms));
bwe.CurrentEstimate(&bitrate_bps, &fraction_loss, &rtt_ms);
EXPECT_GE(bitrate_bps, kInitialBitrateBps);
EXPECT_LE(bitrate_bps, kDelayBasedBitrateBps);
bwe.SetSendBitrate(kForcedHighBitrate);
bwe.SetSendBitrate(DataRate::bps(kForcedHighBitrate), Timestamp::ms(now_ms));
bwe.CurrentEstimate(&bitrate_bps, &fraction_loss, &rtt_ms);
EXPECT_EQ(bitrate_bps, kForcedHighBitrate);
}

37
modules/congestion_controller/goog_cc/goog_cc_network_control.cc
View File

@ -158,7 +158,7 @@ NetworkControlUpdate GoogCcNetworkController::OnNetworkAvailability(
NetworkControlUpdate GoogCcNetworkController::OnNetworkRouteChange(
NetworkRouteChange msg) {
int64_t min_bitrate_bps = GetBpsOrDefault(msg.constraints.min_data_rate, -1);
int64_t min_bitrate_bps = GetBpsOrDefault(msg.constraints.min_data_rate, 0);
int64_t max_bitrate_bps = GetBpsOrDefault(msg.constraints.max_data_rate, -1);
int64_t start_bitrate_bps =
GetBpsOrDefault(msg.constraints.starting_rate, -1);
@ -167,8 +167,10 @@ NetworkControlUpdate GoogCcNetworkController::OnNetworkRouteChange(
bandwidth_estimation_ =
absl::make_unique<SendSideBandwidthEstimation>(event_log_);
bandwidth_estimation_->SetBitrates(start_bitrate_bps, min_bitrate_bps,
max_bitrate_bps);
bandwidth_estimation_->SetBitrates(
msg.constraints.starting_rate, DataRate::bps(min_bitrate_bps),
msg.constraints.max_data_rate.value_or(DataRate::Infinity()),
msg.at_time);
delay_based_bwe_.reset(new DelayBasedBwe(event_log_));
acknowledged_bitrate_estimator_.reset(new AcknowledgedBitrateEstimator());
delay_based_bwe_->SetStartBitrate(start_bitrate_bps);
@ -206,7 +208,7 @@ NetworkControlUpdate GoogCcNetworkController::OnProcessInterval(
initial_config_.reset();
}
bandwidth_estimation_->UpdateEstimate(msg.at_time.ms());
bandwidth_estimation_->UpdateEstimate(msg.at_time);
absl::optional<int64_t> start_time_ms =
alr_detector_->GetApplicationLimitedRegionStartTime();
probe_controller_->SetAlrStartTimeMs(start_time_ms);
@ -225,8 +227,8 @@ NetworkControlUpdate GoogCcNetworkController::OnRemoteBitrateReport(
RTC_LOG(LS_ERROR) << "Received REMB for packet feedback only GoogCC";
return NetworkControlUpdate();
}
bandwidth_estimation_->UpdateReceiverEstimate(msg.receive_time.ms(),
msg.bandwidth.bps());
bandwidth_estimation_->UpdateReceiverEstimate(msg.receive_time,
msg.bandwidth);
BWE_TEST_LOGGING_PLOT(1, "REMB_kbps", msg.receive_time.ms(),
msg.bandwidth.bps() / 1000);
return NetworkControlUpdate();
@ -239,8 +241,7 @@ NetworkControlUpdate GoogCcNetworkController::OnRoundTripTimeUpdate(
if (msg.smoothed) {
delay_based_bwe_->OnRttUpdate(msg.round_trip_time.ms());
} else {
bandwidth_estimation_->UpdateRtt(msg.round_trip_time.ms(),
msg.receive_time.ms());
bandwidth_estimation_->UpdateRtt(msg.round_trip_time, msg.receive_time);
}
return NetworkControlUpdate();
}
@ -307,8 +308,10 @@ GoogCcNetworkController::UpdateBitrateConstraints(
min_bitrate_bps, start_bitrate_bps, max_bitrate_bps,
constraints.at_time.ms()));
bandwidth_estimation_->SetBitrates(start_bitrate_bps, min_bitrate_bps,
max_bitrate_bps);
bandwidth_estimation_->SetBitrates(
starting_rate, DataRate::bps(min_bitrate_bps),
constraints.max_data_rate.value_or(DataRate::Infinity()),
constraints.at_time);
if (start_bitrate_bps > 0)
delay_based_bwe_->SetStartBitrate(start_bitrate_bps);
delay_based_bwe_->SetMinBitrate(min_bitrate_bps);
@ -322,7 +325,7 @@ NetworkControlUpdate GoogCcNetworkController::OnTransportLossReport(
int64_t total_packets_delta =
msg.packets_received_delta + msg.packets_lost_delta;
bandwidth_estimation_->UpdatePacketsLost(
msg.packets_lost_delta, total_packets_delta, msg.receive_time.ms());
msg.packets_lost_delta, total_packets_delta, msg.receive_time);
return NetworkControlUpdate();
}
@ -364,8 +367,7 @@ NetworkControlUpdate GoogCcNetworkController::OnTransportPacketsFeedback(
feedback_min_rtt = std::min(rtt, feedback_min_rtt);
}
if (feedback_min_rtt.IsFinite()) {
bandwidth_estimation_->UpdateRtt(feedback_min_rtt.ms(),
report.feedback_time.ms());
bandwidth_estimation_->UpdateRtt(feedback_min_rtt, report.feedback_time);
}
expected_packets_since_last_loss_update_ +=
@ -378,7 +380,7 @@ NetworkControlUpdate GoogCcNetworkController::OnTransportPacketsFeedback(
next_loss_update_ = report.feedback_time + kLossUpdateInterval;
bandwidth_estimation_->UpdatePacketsLost(
lost_packets_since_last_loss_update_,
expected_packets_since_last_loss_update_, report.feedback_time.ms());
expected_packets_since_last_loss_update_, report.feedback_time);
expected_packets_since_last_loss_update_ = 0;
lost_packets_since_last_loss_update_ = 0;
}
@ -407,12 +409,13 @@ NetworkControlUpdate GoogCcNetworkController::OnTransportPacketsFeedback(
NetworkControlUpdate update;
if (result.updated) {
if (result.probe) {
bandwidth_estimation_->SetSendBitrate(result.target_bitrate_bps);
bandwidth_estimation_->SetSendBitrate(
DataRate::bps(result.target_bitrate_bps), report.feedback_time);
}
// Since SetSendBitrate now resets the delay-based estimate, we have to call
// UpdateDelayBasedEstimate after SetSendBitrate.
bandwidth_estimation_->UpdateDelayBasedEstimate(report.feedback_time.ms(),
result.target_bitrate_bps);
bandwidth_estimation_->UpdateDelayBasedEstimate(
report.feedback_time, DataRate::bps(result.target_bitrate_bps));
// Update the estimate in the ProbeController, in case we want to probe.
MaybeTriggerOnNetworkChanged(&update, report.feedback_time);
}

7
modules/congestion_controller/goog_cc/goog_cc_network_control_unittest.cc
View File

@ -91,9 +91,10 @@ class GoogCcNetworkControllerTest : public ::testing::Test {
return packet_result;
}
NetworkRouteChange CreateRouteChange(DataRate start_rate = DataRate::Zero(),
DataRate min_rate = DataRate::Zero(),
DataRate max_rate = DataRate::Zero()) {
NetworkRouteChange CreateRouteChange(
absl::optional<DataRate> start_rate = absl::nullopt,
absl::optional<DataRate> min_rate = absl::nullopt,
absl::optional<DataRate> max_rate = absl::nullopt) {
NetworkRouteChange route_change;
route_change.at_time = current_time_;
route_change.constraints.at_time = current_time_;

1
modules/remote_bitrate_estimator/BUILD.gn
View File

@ -41,6 +41,7 @@ rtc_static_library("remote_bitrate_estimator") {
deps = [
"../..:webrtc_common",
"../../api/units:data_rate",
"../../modules:module_api",
"../../modules/rtp_rtcp:rtp_rtcp_format",
"../../rtc_base:checks",

4
modules/remote_bitrate_estimator/bwe_defines.cc
View File

@ -26,6 +26,10 @@ int GetMinBitrateBps() {
return kMinBitrateBps;
}
DataRate GetMinBitrate() {
return DataRate::bps(GetMinBitrateBps());
}
} // namespace congestion_controller
RateControlInput::RateControlInput(

2
modules/remote_bitrate_estimator/include/bwe_defines.h
View File

@ -12,6 +12,7 @@
#define MODULES_REMOTE_BITRATE_ESTIMATOR_INCLUDE_BWE_DEFINES_H_
#include "absl/types/optional.h"
#include "api/units/data_rate.h"
#define BWE_MAX(a, b) ((a) > (b) ? (a) : (b))
#define BWE_MIN(a, b) ((a) < (b) ? (a) : (b))
@ -20,6 +21,7 @@ namespace webrtc {
namespace congestion_controller {
int GetMinBitrateBps();
DataRate GetMinBitrate();
} // namespace congestion_controller
static const int64_t kBitrateWindowMs = 1000;