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f3d828eb8e
Bug: none Change-Id: Iad6dfdfdae13149bb8abe4b884e288e50aa7b73d Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/135102 Reviewed-by: Stefan Holmer <stefan@webrtc.org> Commit-Queue: Åsa Persson <asapersson@webrtc.org> Cr-Commit-Position: refs/heads/master@{#27892}
99 lines
3 KiB
C++
99 lines
3 KiB
C++
/*
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* Copyright 2019 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/balanced_degradation_settings.h"
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#include <limits>
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#include "rtc_base/experiments/field_trial_list.h"
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#include "rtc_base/experiments/field_trial_parser.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-Video-BalancedDegradationSettings";
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constexpr int kMinFps = 1;
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constexpr int kMaxFps = 100;
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std::vector<BalancedDegradationSettings::Config> DefaultConfigs() {
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return {{320 * 240, 7}, {480 * 270, 10}, {640 * 480, 15}};
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}
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bool IsValid(const std::vector<BalancedDegradationSettings::Config>& configs) {
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if (configs.size() <= 1) {
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RTC_LOG(LS_WARNING) << "Unsupported size, value ignored.";
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return false;
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}
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for (const auto& config : configs) {
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if (config.fps < kMinFps || config.fps > kMaxFps) {
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RTC_LOG(LS_WARNING) << "Unsupported fps setting, value ignored.";
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return false;
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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].fps < configs[i - 1].fps) {
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RTC_LOG(LS_WARNING) << "Invalid parameter value provided.";
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return false;
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}
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}
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return true;
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}
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std::vector<BalancedDegradationSettings::Config> GetValidOrDefault(
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const std::vector<BalancedDegradationSettings::Config>& configs) {
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if (IsValid(configs)) {
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return configs;
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}
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return DefaultConfigs();
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}
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} // namespace
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BalancedDegradationSettings::Config::Config() = default;
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BalancedDegradationSettings::Config::Config(int pixels, int fps)
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: pixels(pixels), fps(fps) {}
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BalancedDegradationSettings::BalancedDegradationSettings() {
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FieldTrialStructList<Config> configs(
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{FieldTrialStructMember("pixels", [](Config* c) { return &c->pixels; }),
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FieldTrialStructMember("fps", [](Config* c) { return &c->fps; })},
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{});
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ParseFieldTrial({&configs}, field_trial::FindFullName(kFieldTrial));
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configs_ = GetValidOrDefault(configs.Get());
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RTC_DCHECK_GT(configs_.size(), 1);
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}
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BalancedDegradationSettings::~BalancedDegradationSettings() {}
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std::vector<BalancedDegradationSettings::Config>
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BalancedDegradationSettings::GetConfigs() const {
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return configs_;
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}
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int BalancedDegradationSettings::MinFps(int pixels) const {
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for (const auto& config : configs_) {
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if (pixels <= config.pixels)
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return config.fps;
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}
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return std::numeric_limits<int>::max();
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}
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int BalancedDegradationSettings::MaxFps(int pixels) const {
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for (size_t i = 0; i < configs_.size() - 1; ++i) {
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if (pixels <= configs_[i].pixels)
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return configs_[i + 1].fps;
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}
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return std::numeric_limits<int>::max();
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}
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} // namespace webrtc
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