81 lines
2.6 KiB
C++
81 lines
2.6 KiB
C++
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/*
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* Copyright 2020 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 "video/adaptation/quality_rampup_experiment_helper.h"
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#include <memory>
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#include <utility>
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#include "rtc_base/logging.h"
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namespace webrtc {
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QualityRampUpExperimentHelper::QualityRampUpExperimentHelper(
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QualityRampUpExperimentListener* experiment_listener,
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Clock* clock,
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QualityRampupExperiment experiment)
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: experiment_listener_(experiment_listener),
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clock_(clock),
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quality_rampup_experiment_(std::move(experiment)),
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cpu_adapted_(false),
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qp_resolution_adaptations_(0) {
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RTC_DCHECK(experiment_listener_);
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RTC_DCHECK(clock_);
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}
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std::unique_ptr<QualityRampUpExperimentHelper>
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QualityRampUpExperimentHelper::CreateIfEnabled(
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QualityRampUpExperimentListener* experiment_listener,
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Clock* clock) {
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QualityRampupExperiment experiment = QualityRampupExperiment::ParseSettings();
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if (experiment.Enabled()) {
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return std::unique_ptr<QualityRampUpExperimentHelper>(
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new QualityRampUpExperimentHelper(experiment_listener, clock,
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experiment));
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}
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return nullptr;
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}
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void QualityRampUpExperimentHelper::PerformQualityRampupExperiment(
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rtc::scoped_refptr<QualityScalerResource> quality_scaler_resource,
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DataRate bandwidth,
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DataRate encoder_target_bitrate,
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DataRate max_bitrate,
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int pixels) {
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if (!quality_scaler_resource->is_started())
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return;
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int64_t now_ms = clock_->TimeInMilliseconds();
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quality_rampup_experiment_.SetMaxBitrate(pixels, max_bitrate.kbps());
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bool try_quality_rampup = false;
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if (quality_rampup_experiment_.BwHigh(now_ms, bandwidth.kbps())) {
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// Verify that encoder is at max bitrate and the QP is low.
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if (encoder_target_bitrate == max_bitrate &&
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quality_scaler_resource->QpFastFilterLow()) {
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try_quality_rampup = true;
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}
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}
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if (try_quality_rampup && qp_resolution_adaptations_ > 0 && !cpu_adapted_) {
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experiment_listener_->OnQualityRampUp();
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}
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}
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void QualityRampUpExperimentHelper::cpu_adapted(bool cpu_adapted) {
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cpu_adapted_ = cpu_adapted;
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}
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void QualityRampUpExperimentHelper::qp_resolution_adaptations(
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int qp_resolution_adaptations) {
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qp_resolution_adaptations_ = qp_resolution_adaptations;
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}
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} // namespace webrtc
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