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139f4dc7ac
optional<int> initial_bitrate_interval_ms: time interval since start of call where fast adapt down is allowed. optional<double> initial_bitrate_factor: try fast adapt down if bw estimate is below initial bitrate * factor. Bug: none Change-Id: I63e1fdaac6556d8e9a961a42e11c925f9ecb9771 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/147725 Reviewed-by: Sergey Silkin <ssilkin@webrtc.org> Commit-Queue: Åsa Persson <asapersson@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28753}
83 lines
2.9 KiB
C++
83 lines
2.9 KiB
C++
/*
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* Copyright (c) 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/quality_scaler_settings.h"
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#include "api/transport/field_trial_based_config.h"
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#include "rtc_base/logging.h"
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namespace webrtc {
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namespace {
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const int kMinFrames = 10;
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const double kMinScaleFactor = 0.01;
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} // namespace
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QualityScalerSettings::QualityScalerSettings(
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const WebRtcKeyValueConfig* const key_value_config)
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: min_frames_("min_frames"),
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initial_scale_factor_("initial_scale_factor"),
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scale_factor_("scale_factor"),
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initial_bitrate_interval_ms_("initial_bitrate_interval_ms"),
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initial_bitrate_factor_("initial_bitrate_factor") {
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ParseFieldTrial(
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{&min_frames_, &initial_scale_factor_, &scale_factor_,
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&initial_bitrate_interval_ms_, &initial_bitrate_factor_},
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key_value_config->Lookup("WebRTC-Video-QualityScalerSettings"));
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}
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QualityScalerSettings QualityScalerSettings::ParseFromFieldTrials() {
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FieldTrialBasedConfig field_trial_config;
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return QualityScalerSettings(&field_trial_config);
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}
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absl::optional<int> QualityScalerSettings::MinFrames() const {
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if (min_frames_ && min_frames_.Value() < kMinFrames) {
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RTC_LOG(LS_WARNING) << "Unsupported min_frames value, ignored.";
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return absl::nullopt;
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}
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return min_frames_.GetOptional();
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}
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absl::optional<double> QualityScalerSettings::InitialScaleFactor() const {
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if (initial_scale_factor_ &&
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initial_scale_factor_.Value() < kMinScaleFactor) {
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RTC_LOG(LS_WARNING) << "Unsupported initial_scale_factor value, ignored.";
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return absl::nullopt;
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}
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return initial_scale_factor_.GetOptional();
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}
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absl::optional<double> QualityScalerSettings::ScaleFactor() const {
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if (scale_factor_ && scale_factor_.Value() < kMinScaleFactor) {
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RTC_LOG(LS_WARNING) << "Unsupported scale_factor value, ignored.";
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return absl::nullopt;
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}
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return scale_factor_.GetOptional();
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}
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absl::optional<int> QualityScalerSettings::InitialBitrateIntervalMs() const {
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if (initial_bitrate_interval_ms_ &&
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initial_bitrate_interval_ms_.Value() < 0) {
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RTC_LOG(LS_WARNING) << "Unsupported bitrate_interval value, ignored.";
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return absl::nullopt;
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}
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return initial_bitrate_interval_ms_.GetOptional();
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}
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absl::optional<double> QualityScalerSettings::InitialBitrateFactor() const {
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if (initial_bitrate_factor_ &&
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initial_bitrate_factor_.Value() < kMinScaleFactor) {
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RTC_LOG(LS_WARNING) << "Unsupported initial_bitrate_factor value, ignored.";
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return absl::nullopt;
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}
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return initial_bitrate_factor_.GetOptional();
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}
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} // namespace webrtc
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