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5b69873cb5
Instead use WebRtcKeyValueConfig and FieldTrialBasedConfig. The purpose is to allow a user of GoogCC to use different settings on different instances. BUG=webrtc:10335 Change-Id: I2f837688c9fdd341eecb44484cc784b1c80da1a9 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/132791 Commit-Queue: Per Kjellander <perkj@webrtc.org> Reviewed-by: Sebastian Jansson <srte@webrtc.org> Cr-Commit-Position: refs/heads/master@{#27617}
98 lines
3.6 KiB
C++
98 lines
3.6 KiB
C++
/*
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* Copyright (c) 2016 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/goog_cc/alr_detector.h"
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#include <cstdint>
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#include <cstdio>
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#include "absl/memory/memory.h"
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#include "logging/rtc_event_log/events/rtc_event.h"
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#include "logging/rtc_event_log/events/rtc_event_alr_state.h"
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#include "logging/rtc_event_log/rtc_event_log.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/experiments/alr_experiment.h"
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#include "rtc_base/numerics/safe_conversions.h"
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#include "rtc_base/time_utils.h"
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namespace webrtc {
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AlrDetector::AlrDetector(const WebRtcKeyValueConfig* key_value_config)
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: AlrDetector(key_value_config, nullptr) {}
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AlrDetector::AlrDetector(const WebRtcKeyValueConfig* key_value_config,
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RtcEventLog* event_log)
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: bandwidth_usage_percent_(kDefaultAlrBandwidthUsagePercent),
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alr_start_budget_level_percent_(kDefaultAlrStartBudgetLevelPercent),
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alr_stop_budget_level_percent_(kDefaultAlrStopBudgetLevelPercent),
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alr_budget_(0, true),
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event_log_(event_log) {
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RTC_CHECK(AlrExperimentSettings::MaxOneFieldTrialEnabled(*key_value_config));
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absl::optional<AlrExperimentSettings> experiment_settings =
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AlrExperimentSettings::CreateFromFieldTrial(
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*key_value_config,
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AlrExperimentSettings::kScreenshareProbingBweExperimentName);
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if (!experiment_settings) {
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experiment_settings = AlrExperimentSettings::CreateFromFieldTrial(
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*key_value_config,
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AlrExperimentSettings::kStrictPacingAndProbingExperimentName);
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}
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if (experiment_settings) {
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alr_stop_budget_level_percent_ =
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experiment_settings->alr_stop_budget_level_percent;
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alr_start_budget_level_percent_ =
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experiment_settings->alr_start_budget_level_percent;
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bandwidth_usage_percent_ = experiment_settings->alr_bandwidth_usage_percent;
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}
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}
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AlrDetector::~AlrDetector() {}
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void AlrDetector::OnBytesSent(size_t bytes_sent, int64_t send_time_ms) {
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if (!last_send_time_ms_.has_value()) {
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last_send_time_ms_ = send_time_ms;
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// Since the duration for sending the bytes is unknwon, return without
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// updating alr state.
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return;
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}
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int64_t delta_time_ms = send_time_ms - *last_send_time_ms_;
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last_send_time_ms_ = send_time_ms;
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alr_budget_.UseBudget(bytes_sent);
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alr_budget_.IncreaseBudget(delta_time_ms);
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bool state_changed = false;
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if (alr_budget_.budget_level_percent() > alr_start_budget_level_percent_ &&
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!alr_started_time_ms_) {
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alr_started_time_ms_.emplace(rtc::TimeMillis());
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state_changed = true;
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} else if (alr_budget_.budget_level_percent() <
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alr_stop_budget_level_percent_ &&
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alr_started_time_ms_) {
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state_changed = true;
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alr_started_time_ms_.reset();
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}
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if (event_log_ && state_changed) {
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event_log_->Log(
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absl::make_unique<RtcEventAlrState>(alr_started_time_ms_.has_value()));
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}
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}
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void AlrDetector::SetEstimatedBitrate(int bitrate_bps) {
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RTC_DCHECK(bitrate_bps);
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const auto target_rate_kbps = static_cast<int64_t>(bitrate_bps) *
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bandwidth_usage_percent_ / (1000 * 100);
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alr_budget_.set_target_rate_kbps(rtc::dchecked_cast<int>(target_rate_kbps));
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}
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absl::optional<int64_t> AlrDetector::GetApplicationLimitedRegionStartTime()
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const {
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return alr_started_time_ms_;
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}
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} // namespace webrtc
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