Repo created

TMessagesProj/jni/voip/webrtc/rtc_base/experiments/alr_experiment.cc

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+/*
+ *  Copyright (c) 2018 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 "rtc_base/experiments/alr_experiment.h"
+
+#include <inttypes.h>
+#include <stdio.h>
+
+#include <string>
+
+#include "absl/strings/string_view.h"
+#include "api/field_trials_view.h"
+#include "rtc_base/logging.h"
+
+namespace webrtc {
+namespace {
+
+constexpr absl::string_view kDefaultProbingScreenshareBweSettings =
+    "1.0,2875,80,40,-60,3";
+
+}  // namespace
+
+bool AlrExperimentSettings::MaxOneFieldTrialEnabled(
+    const FieldTrialsView& key_value_config) {
+  return key_value_config.Lookup(kStrictPacingAndProbingExperimentName)
+             .empty() ||
+         key_value_config.Lookup(kScreenshareProbingBweExperimentName).empty();
+}
+
+absl::optional<AlrExperimentSettings>
+AlrExperimentSettings::CreateFromFieldTrial(
+    const FieldTrialsView& key_value_config,
+    absl::string_view experiment_name) {
+  absl::optional<AlrExperimentSettings> ret;
+  std::string group_name = key_value_config.Lookup(experiment_name);
+
+  const std::string kIgnoredSuffix = "_Dogfood";
+  std::string::size_type suffix_pos = group_name.rfind(kIgnoredSuffix);
+  if (suffix_pos != std::string::npos &&
+      suffix_pos == group_name.length() - kIgnoredSuffix.length()) {
+    group_name.resize(group_name.length() - kIgnoredSuffix.length());
+  }
+
+  if (group_name.empty()) {
+    if (experiment_name == kScreenshareProbingBweExperimentName) {
+      // This experiment is now default-on with fixed settings.
+      // TODO(sprang): Remove this kill-switch and clean up experiment code.
+      group_name = kDefaultProbingScreenshareBweSettings;
+    } else {
+      return ret;
+    }
+  }
+
+  AlrExperimentSettings settings;
+  if (sscanf(group_name.c_str(), "%f,%" PRId64 ",%d,%d,%d,%d",
+             &settings.pacing_factor, &settings.max_paced_queue_time,
+             &settings.alr_bandwidth_usage_percent,
+             &settings.alr_start_budget_level_percent,
+             &settings.alr_stop_budget_level_percent,
+             &settings.group_id) == 6) {
+    ret.emplace(settings);
+    RTC_LOG(LS_INFO) << "Using ALR experiment settings: "
+                        "pacing factor: "
+                     << settings.pacing_factor << ", max pacer queue length: "
+                     << settings.max_paced_queue_time
+                     << ", ALR bandwidth usage percent: "
+                     << settings.alr_bandwidth_usage_percent
+                     << ", ALR start budget level percent: "
+                     << settings.alr_start_budget_level_percent
+                     << ", ALR end budget level percent: "
+                     << settings.alr_stop_budget_level_percent
+                     << ", ALR experiment group ID: " << settings.group_id;
+  } else {
+    RTC_LOG(LS_INFO) << "Failed to parse ALR experiment: " << experiment_name;
+  }
+
+  return ret;
+}
+
+}  // namespace webrtc