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/*
* Copyright 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/normalize_simulcast_size_experiment.h"
#include <stdio.h>
#include <string>
#include "rtc_base/logging.h"
#include "system_wrappers/include/field_trial.h"
namespace webrtc {
namespace {
constexpr char kFieldTrial[] = "WebRTC-NormalizeSimulcastResolution";
constexpr int kMinSetting = 0;
constexpr int kMaxSetting = 5;
} // namespace
absl::optional<int> NormalizeSimulcastSizeExperiment::GetBase2Exponent() {
if (!webrtc::field_trial::IsEnabled(kFieldTrial))
return absl::nullopt;
const std::string group = webrtc::field_trial::FindFullName(kFieldTrial);
if (group.empty())
return absl::nullopt;
int exponent;
if (sscanf(group.c_str(), "Enabled-%d", &exponent) != 1) {
RTC_LOG(LS_WARNING) << "No parameter provided.";
return absl::nullopt;
}
if (exponent < kMinSetting || exponent > kMaxSetting) {
RTC_LOG(LS_WARNING) << "Unsupported exp value provided, value ignored.";
return absl::nullopt;
}
return absl::optional<int>(exponent);
}
} // namespace webrtc
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