Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 111 insertions, 0 deletions

diff --git a/third_party/libwebrtc/modules/congestion_controller/goog_cc/alr_detector.cc b/third_party/libwebrtc/modules/congestion_controller/goog_cc/alr_detector.cc
new file mode 100644
index 0000000000..f1e649b7cd
--- /dev/null
+++ b/third_party/libwebrtc/modules/congestion_controller/goog_cc/alr_detector.cc
@@ -0,0 +1,111 @@
+/*
+ *  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