| /* |
| * 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_rampup_experiment.h" |
| |
| #include <algorithm> |
| |
| #include "api/transport/field_trial_based_config.h" |
| #include "rtc_base/logging.h" |
| |
| namespace webrtc { |
| |
| QualityRampupExperiment::QualityRampupExperiment( |
| const WebRtcKeyValueConfig* const key_value_config) |
| : min_pixels_("min_pixels"), |
| min_duration_ms_("min_duration_ms"), |
| max_bitrate_factor_("max_bitrate_factor") { |
| ParseFieldTrial( |
| {&min_pixels_, &min_duration_ms_, &max_bitrate_factor_}, |
| key_value_config->Lookup("WebRTC-Video-QualityRampupSettings")); |
| } |
| |
| QualityRampupExperiment QualityRampupExperiment::ParseSettings() { |
| FieldTrialBasedConfig field_trial_config; |
| return QualityRampupExperiment(&field_trial_config); |
| } |
| |
| absl::optional<int> QualityRampupExperiment::MinPixels() const { |
| return min_pixels_.GetOptional(); |
| } |
| |
| absl::optional<int> QualityRampupExperiment::MinDurationMs() const { |
| return min_duration_ms_.GetOptional(); |
| } |
| |
| absl::optional<double> QualityRampupExperiment::MaxBitrateFactor() const { |
| return max_bitrate_factor_.GetOptional(); |
| } |
| |
| void QualityRampupExperiment::SetMaxBitrate(int pixels, |
| uint32_t max_bitrate_kbps) { |
| if (!min_pixels_ || pixels < min_pixels_.Value() || max_bitrate_kbps == 0) { |
| return; |
| } |
| max_bitrate_kbps_ = std::max(max_bitrate_kbps_.value_or(0), max_bitrate_kbps); |
| } |
| |
| bool QualityRampupExperiment::BwHigh(int64_t now_ms, |
| uint32_t available_bw_kbps) { |
| if (!min_pixels_ || !min_duration_ms_ || !max_bitrate_kbps_) { |
| return false; |
| } |
| |
| if (available_bw_kbps < |
| max_bitrate_kbps_.value() * MaxBitrateFactor().value_or(1)) { |
| start_ms_.reset(); |
| return false; |
| } |
| |
| if (!start_ms_) |
| start_ms_ = now_ms; |
| |
| return (now_ms - *start_ms_) >= min_duration_ms_.Value(); |
| } |
| |
| void QualityRampupExperiment::Reset() { |
| start_ms_.reset(); |
| max_bitrate_kbps_.reset(); |
| } |
| |
| bool QualityRampupExperiment::Enabled() const { |
| return min_pixels_ && min_duration_ms_; |
| } |
| |
| } // namespace webrtc |