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/*
* Copyright (c) 2019 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/quality_scaler_settings.h"
#include "api/transport/field_trial_based_config.h"
#include "rtc_base/logging.h"
namespace webrtc {
namespace {
const int kMinFrames = 10;
const double kMinScaleFactor = 0.01;
} // namespace
QualityScalerSettings::QualityScalerSettings(
const FieldTrialsView* const key_value_config)
: sampling_period_ms_("sampling_period_ms"),
average_qp_window_("average_qp_window"),
min_frames_("min_frames"),
initial_scale_factor_("initial_scale_factor"),
scale_factor_("scale_factor"),
initial_bitrate_interval_ms_("initial_bitrate_interval_ms"),
initial_bitrate_factor_("initial_bitrate_factor") {
ParseFieldTrial(
{&sampling_period_ms_, &average_qp_window_, &min_frames_,
&initial_scale_factor_, &scale_factor_, &initial_bitrate_interval_ms_,
&initial_bitrate_factor_},
key_value_config->Lookup("WebRTC-Video-QualityScalerSettings"));
}
QualityScalerSettings QualityScalerSettings::ParseFromFieldTrials() {
FieldTrialBasedConfig field_trial_config;
return QualityScalerSettings(&field_trial_config);
}
absl::optional<int> QualityScalerSettings::SamplingPeriodMs() const {
if (sampling_period_ms_ && sampling_period_ms_.Value() <= 0) {
RTC_LOG(LS_WARNING) << "Unsupported sampling_period_ms value, ignored.";
return absl::nullopt;
}
return sampling_period_ms_.GetOptional();
}
absl::optional<int> QualityScalerSettings::AverageQpWindow() const {
if (average_qp_window_ && average_qp_window_.Value() <= 0) {
RTC_LOG(LS_WARNING) << "Unsupported average_qp_window value, ignored.";
return absl::nullopt;
}
return average_qp_window_.GetOptional();
}
absl::optional<int> QualityScalerSettings::MinFrames() const {
if (min_frames_ && min_frames_.Value() < kMinFrames) {
RTC_LOG(LS_WARNING) << "Unsupported min_frames value, ignored.";
return absl::nullopt;
}
return min_frames_.GetOptional();
}
absl::optional<double> QualityScalerSettings::InitialScaleFactor() const {
if (initial_scale_factor_ &&
initial_scale_factor_.Value() < kMinScaleFactor) {
RTC_LOG(LS_WARNING) << "Unsupported initial_scale_factor value, ignored.";
return absl::nullopt;
}
return initial_scale_factor_.GetOptional();
}
absl::optional<double> QualityScalerSettings::ScaleFactor() const {
if (scale_factor_ && scale_factor_.Value() < kMinScaleFactor) {
RTC_LOG(LS_WARNING) << "Unsupported scale_factor value, ignored.";
return absl::nullopt;
}
return scale_factor_.GetOptional();
}
absl::optional<int> QualityScalerSettings::InitialBitrateIntervalMs() const {
if (initial_bitrate_interval_ms_ &&
initial_bitrate_interval_ms_.Value() < 0) {
RTC_LOG(LS_WARNING) << "Unsupported bitrate_interval value, ignored.";
return absl::nullopt;
}
return initial_bitrate_interval_ms_.GetOptional();
}
absl::optional<double> QualityScalerSettings::InitialBitrateFactor() const {
if (initial_bitrate_factor_ &&
initial_bitrate_factor_.Value() < kMinScaleFactor) {
RTC_LOG(LS_WARNING) << "Unsupported initial_bitrate_factor value, ignored.";
return absl::nullopt;
}
return initial_bitrate_factor_.GetOptional();
}
} // namespace webrtc
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