mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-13 13:50:40 +01:00
e62c2f2c77
rename WebRtcKeyValueConfig to FieldTrialsView Bug: webrtc:10335 Change-Id: If725bd498c4c3daf144bee638230fa089fdde833 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/256965 Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Commit-Queue: Jonas Oreland <jonaso@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#36365}
111 lines
3.9 KiB
C++
111 lines
3.9 KiB
C++
/*
|
|
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#include "modules/congestion_controller/goog_cc/alr_detector.h"
|
|
|
|
#include <cstdint>
|
|
#include <cstdio>
|
|
#include <memory>
|
|
|
|
#include "api/rtc_event_log/rtc_event.h"
|
|
#include "api/rtc_event_log/rtc_event_log.h"
|
|
#include "logging/rtc_event_log/events/rtc_event_alr_state.h"
|
|
#include "rtc_base/checks.h"
|
|
#include "rtc_base/numerics/safe_conversions.h"
|
|
#include "rtc_base/time_utils.h"
|
|
|
|
namespace webrtc {
|
|
|
|
namespace {
|
|
AlrDetectorConfig GetConfigFromTrials(const FieldTrialsView* key_value_config) {
|
|
RTC_CHECK(AlrExperimentSettings::MaxOneFieldTrialEnabled(*key_value_config));
|
|
absl::optional<AlrExperimentSettings> experiment_settings =
|
|
AlrExperimentSettings::CreateFromFieldTrial(
|
|
*key_value_config,
|
|
AlrExperimentSettings::kScreenshareProbingBweExperimentName);
|
|
if (!experiment_settings) {
|
|
experiment_settings = AlrExperimentSettings::CreateFromFieldTrial(
|
|
*key_value_config,
|
|
AlrExperimentSettings::kStrictPacingAndProbingExperimentName);
|
|
}
|
|
AlrDetectorConfig conf;
|
|
if (experiment_settings) {
|
|
conf.bandwidth_usage_ratio =
|
|
experiment_settings->alr_bandwidth_usage_percent / 100.0;
|
|
conf.start_budget_level_ratio =
|
|
experiment_settings->alr_start_budget_level_percent / 100.0;
|
|
conf.stop_budget_level_ratio =
|
|
experiment_settings->alr_stop_budget_level_percent / 100.0;
|
|
}
|
|
conf.Parser()->Parse(
|
|
key_value_config->Lookup("WebRTC-AlrDetectorParameters"));
|
|
return conf;
|
|
}
|
|
} // namespace
|
|
|
|
std::unique_ptr<StructParametersParser> AlrDetectorConfig::Parser() {
|
|
return StructParametersParser::Create( //
|
|
"bw_usage", &bandwidth_usage_ratio, //
|
|
"start", &start_budget_level_ratio, //
|
|
"stop", &stop_budget_level_ratio);
|
|
}
|
|
|
|
AlrDetector::AlrDetector(AlrDetectorConfig config, RtcEventLog* event_log)
|
|
: conf_(config), alr_budget_(0, true), event_log_(event_log) {}
|
|
|
|
AlrDetector::AlrDetector(const FieldTrialsView* key_value_config)
|
|
: AlrDetector(GetConfigFromTrials(key_value_config), nullptr) {}
|
|
|
|
AlrDetector::AlrDetector(const FieldTrialsView* key_value_config,
|
|
RtcEventLog* event_log)
|
|
: AlrDetector(GetConfigFromTrials(key_value_config), event_log) {}
|
|
AlrDetector::~AlrDetector() {}
|
|
|
|
void AlrDetector::OnBytesSent(size_t bytes_sent, int64_t send_time_ms) {
|
|
if (!last_send_time_ms_.has_value()) {
|
|
last_send_time_ms_ = send_time_ms;
|
|
// Since the duration for sending the bytes is unknwon, return without
|
|
// updating alr state.
|
|
return;
|
|
}
|
|
int64_t delta_time_ms = send_time_ms - *last_send_time_ms_;
|
|
last_send_time_ms_ = send_time_ms;
|
|
|
|
alr_budget_.UseBudget(bytes_sent);
|
|
alr_budget_.IncreaseBudget(delta_time_ms);
|
|
bool state_changed = false;
|
|
if (alr_budget_.budget_ratio() > conf_.start_budget_level_ratio &&
|
|
!alr_started_time_ms_) {
|
|
alr_started_time_ms_.emplace(rtc::TimeMillis());
|
|
state_changed = true;
|
|
} else if (alr_budget_.budget_ratio() < conf_.stop_budget_level_ratio &&
|
|
alr_started_time_ms_) {
|
|
state_changed = true;
|
|
alr_started_time_ms_.reset();
|
|
}
|
|
if (event_log_ && state_changed) {
|
|
event_log_->Log(
|
|
std::make_unique<RtcEventAlrState>(alr_started_time_ms_.has_value()));
|
|
}
|
|
}
|
|
|
|
void AlrDetector::SetEstimatedBitrate(int bitrate_bps) {
|
|
RTC_DCHECK(bitrate_bps);
|
|
int target_rate_kbps =
|
|
static_cast<double>(bitrate_bps) * conf_.bandwidth_usage_ratio / 1000;
|
|
alr_budget_.set_target_rate_kbps(target_rate_kbps);
|
|
}
|
|
|
|
absl::optional<int64_t> AlrDetector::GetApplicationLimitedRegionStartTime()
|
|
const {
|
|
return alr_started_time_ms_;
|
|
}
|
|
|
|
} // namespace webrtc
|