1 /* 2 * Copyright (c) 2018 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include "rtc_base/experiments/jitter_upper_bound_experiment.h" 12 13 #include <stdio.h> 14 15 #include <string> 16 17 #include "rtc_base/logging.h" 18 #include "system_wrappers/include/field_trial.h" 19 20 namespace webrtc { 21 22 const char JitterUpperBoundExperiment::kJitterUpperBoundExperimentName[] = 23 "WebRTC-JitterUpperBound"; 24 GetUpperBoundSigmas()25absl::optional<double> JitterUpperBoundExperiment::GetUpperBoundSigmas() { 26 if (!field_trial::IsEnabled(kJitterUpperBoundExperimentName)) { 27 return absl::nullopt; 28 } 29 const std::string group = 30 webrtc::field_trial::FindFullName(kJitterUpperBoundExperimentName); 31 32 double upper_bound_sigmas; 33 if (sscanf(group.c_str(), "Enabled-%lf", &upper_bound_sigmas) != 1) { 34 RTC_LOG(LS_WARNING) << "Invalid number of parameters provided."; 35 return absl::nullopt; 36 } 37 38 if (upper_bound_sigmas < 0) { 39 RTC_LOG(LS_WARNING) << "Invalid jitter upper bound sigmas, must be >= 0.0: " 40 << upper_bound_sigmas; 41 return absl::nullopt; 42 } 43 44 return upper_bound_sigmas; 45 } 46 47 } // namespace webrtc 48