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/*
* Copyright 2020 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 "video/adaptation/quality_rampup_experiment_helper.h"
#include <memory>
#include <utility>
#include "rtc_base/logging.h"
namespace webrtc {
QualityRampUpExperimentHelper::QualityRampUpExperimentHelper(
QualityRampUpExperimentListener* experiment_listener,
Clock* clock,
QualityRampupExperiment experiment)
: experiment_listener_(experiment_listener),
clock_(clock),
quality_rampup_experiment_(std::move(experiment)),
cpu_adapted_(false),
qp_resolution_adaptations_(0) {
RTC_DCHECK(experiment_listener_);
RTC_DCHECK(clock_);
}
std::unique_ptr<QualityRampUpExperimentHelper>
QualityRampUpExperimentHelper::CreateIfEnabled(
QualityRampUpExperimentListener* experiment_listener,
Clock* clock) {
QualityRampupExperiment experiment = QualityRampupExperiment::ParseSettings();
if (experiment.Enabled()) {
return std::unique_ptr<QualityRampUpExperimentHelper>(
new QualityRampUpExperimentHelper(experiment_listener, clock,
experiment));
}
return nullptr;
}
void QualityRampUpExperimentHelper::ConfigureQualityRampupExperiment(
bool reset,
absl::optional<uint32_t> pixels,
absl::optional<DataRate> max_bitrate) {
if (reset)
quality_rampup_experiment_.Reset();
if (pixels && max_bitrate)
quality_rampup_experiment_.SetMaxBitrate(*pixels, max_bitrate->kbps());
}
void QualityRampUpExperimentHelper::PerformQualityRampupExperiment(
rtc::scoped_refptr<QualityScalerResource> quality_scaler_resource,
DataRate bandwidth,
DataRate encoder_target_bitrate,
absl::optional<DataRate> max_bitrate) {
if (!quality_scaler_resource->is_started() || !max_bitrate)
return;
int64_t now_ms = clock_->TimeInMilliseconds();
bool try_quality_rampup = false;
if (quality_rampup_experiment_.BwHigh(now_ms, bandwidth.kbps())) {
// Verify that encoder is at max bitrate and the QP is low.
if (encoder_target_bitrate == *max_bitrate &&
quality_scaler_resource->QpFastFilterLow()) {
try_quality_rampup = true;
}
}
if (try_quality_rampup && qp_resolution_adaptations_ > 0 && !cpu_adapted_) {
experiment_listener_->OnQualityRampUp();
}
}
void QualityRampUpExperimentHelper::cpu_adapted(bool cpu_adapted) {
cpu_adapted_ = cpu_adapted;
}
void QualityRampUpExperimentHelper::qp_resolution_adaptations(
int qp_resolution_adaptations) {
qp_resolution_adaptations_ = qp_resolution_adaptations;
}
} // namespace webrtc
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