73 lines
2.2 KiB
C++
73 lines
2.2 KiB
C++
/*
|
|
* 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/cpu_speed_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-VP8-CpuSpeed-Arm";
|
|
constexpr int kMinSetting = -16;
|
|
constexpr int kMaxSetting = -1;
|
|
} // namespace
|
|
|
|
absl::optional<std::vector<CpuSpeedExperiment::Config>>
|
|
CpuSpeedExperiment::GetConfigs() {
|
|
if (!webrtc::field_trial::IsEnabled(kFieldTrial))
|
|
return absl::nullopt;
|
|
|
|
const std::string group = webrtc::field_trial::FindFullName(kFieldTrial);
|
|
if (group.empty())
|
|
return absl::nullopt;
|
|
|
|
std::vector<Config> configs(3);
|
|
if (sscanf(group.c_str(), "Enabled-%d,%d,%d,%d,%d,%d", &(configs[0].pixels),
|
|
&(configs[0].cpu_speed), &(configs[1].pixels),
|
|
&(configs[1].cpu_speed), &(configs[2].pixels),
|
|
&(configs[2].cpu_speed)) != 6) {
|
|
RTC_LOG(LS_WARNING) << "Too few parameters provided.";
|
|
return absl::nullopt;
|
|
}
|
|
|
|
for (const auto& config : configs) {
|
|
if (config.cpu_speed < kMinSetting || config.cpu_speed > kMaxSetting) {
|
|
RTC_LOG(LS_WARNING) << "Unsupported cpu speed setting, value ignored.";
|
|
return absl::nullopt;
|
|
}
|
|
}
|
|
|
|
for (size_t i = 1; i < configs.size(); ++i) {
|
|
if (configs[i].pixels < configs[i - 1].pixels ||
|
|
configs[i].cpu_speed > configs[i - 1].cpu_speed) {
|
|
RTC_LOG(LS_WARNING) << "Invalid parameter value provided.";
|
|
return absl::nullopt;
|
|
}
|
|
}
|
|
|
|
return absl::optional<std::vector<Config>>(configs);
|
|
}
|
|
|
|
int CpuSpeedExperiment::GetValue(int pixels,
|
|
const std::vector<Config>& configs) {
|
|
for (const auto& config : configs) {
|
|
if (pixels <= config.pixels)
|
|
return config.cpu_speed;
|
|
}
|
|
return kMinSetting;
|
|
}
|
|
|
|
} // namespace webrtc
|