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ae096ef7a6
Bug: none Change-Id: I4eb08517cacdb180085a4a5dd8649470b62f4600 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/208286 Reviewed-by: Rasmus Brandt <brandtr@webrtc.org> Commit-Queue: Åsa Persson <asapersson@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33301}
89 lines
2.7 KiB
C++
89 lines
2.7 KiB
C++
/*
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* Copyright 2018 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "rtc_base/experiments/cpu_speed_experiment.h"
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#include <stdio.h>
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#include "rtc_base/experiments/field_trial_list.h"
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#include "rtc_base/logging.h"
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#include "system_wrappers/include/field_trial.h"
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namespace webrtc {
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namespace {
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constexpr char kFieldTrial[] = "WebRTC-VP8-CpuSpeed-Arm";
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constexpr int kMinSetting = -16;
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constexpr int kMaxSetting = -1;
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std::vector<CpuSpeedExperiment::Config> GetValidOrEmpty(
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const std::vector<CpuSpeedExperiment::Config>& configs) {
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if (configs.empty()) {
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return {};
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}
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for (const auto& config : configs) {
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if (config.cpu_speed < kMinSetting || config.cpu_speed > kMaxSetting) {
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RTC_LOG(LS_WARNING) << "Unsupported cpu speed setting, value ignored.";
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return {};
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}
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}
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for (size_t i = 1; i < configs.size(); ++i) {
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if (configs[i].pixels < configs[i - 1].pixels ||
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configs[i].cpu_speed > configs[i - 1].cpu_speed) {
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RTC_LOG(LS_WARNING) << "Invalid parameter value provided.";
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return {};
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}
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}
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return configs;
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}
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bool HasLeCores(const std::vector<CpuSpeedExperiment::Config>& configs) {
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for (const auto& config : configs) {
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if (config.cpu_speed_le_cores == 0)
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return false;
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}
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return true;
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}
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} // namespace
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CpuSpeedExperiment::CpuSpeedExperiment() : cores_("cores") {
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FieldTrialStructList<Config> configs(
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{FieldTrialStructMember("pixels", [](Config* c) { return &c->pixels; }),
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FieldTrialStructMember("cpu_speed",
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[](Config* c) { return &c->cpu_speed; }),
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FieldTrialStructMember(
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"cpu_speed_le_cores",
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[](Config* c) { return &c->cpu_speed_le_cores; })},
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{});
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ParseFieldTrial({&configs, &cores_}, field_trial::FindFullName(kFieldTrial));
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configs_ = GetValidOrEmpty(configs.Get());
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}
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CpuSpeedExperiment::~CpuSpeedExperiment() {}
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absl::optional<int> CpuSpeedExperiment::GetValue(int pixels,
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int num_cores) const {
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if (configs_.empty())
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return absl::nullopt;
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bool use_le = HasLeCores(configs_) && cores_ && num_cores <= cores_.Value();
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for (const auto& config : configs_) {
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if (pixels <= config.pixels)
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return use_le ? absl::optional<int>(config.cpu_speed_le_cores)
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: absl::optional<int>(config.cpu_speed);
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}
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return absl::optional<int>(kMinSetting);
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}
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} // namespace webrtc
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