59 lines
2.2 KiB
C++
59 lines
2.2 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 <string>
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#include <utility>
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#include "rtc_base/synchronization/sequence_checker.h"
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#include "rtc_base/task_utils/to_queued_task.h"
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#include "video/adaptation/balanced_constraint.h"
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namespace webrtc {
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BalancedConstraint::BalancedConstraint(
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DegradationPreferenceProvider* degradation_preference_provider)
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: encoder_target_bitrate_bps_(absl::nullopt),
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degradation_preference_provider_(degradation_preference_provider) {
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RTC_DCHECK(degradation_preference_provider_);
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sequence_checker_.Detach();
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}
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void BalancedConstraint::OnEncoderTargetBitrateUpdated(
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absl::optional<uint32_t> encoder_target_bitrate_bps) {
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RTC_DCHECK_RUN_ON(&sequence_checker_);
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encoder_target_bitrate_bps_ = std::move(encoder_target_bitrate_bps);
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}
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bool BalancedConstraint::IsAdaptationUpAllowed(
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const VideoStreamInputState& input_state,
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const VideoSourceRestrictions& restrictions_before,
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const VideoSourceRestrictions& restrictions_after) const {
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RTC_DCHECK_RUN_ON(&sequence_checker_);
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// Don't adapt if BalancedDegradationSettings applies and determines this will
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// exceed bitrate constraints.
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if (degradation_preference_provider_->degradation_preference() ==
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DegradationPreference::BALANCED &&
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!balanced_settings_.CanAdaptUp(input_state.video_codec_type(),
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input_state.frame_size_pixels().value(),
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encoder_target_bitrate_bps_.value_or(0))) {
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return false;
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}
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if (DidIncreaseResolution(restrictions_before, restrictions_after) &&
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!balanced_settings_.CanAdaptUpResolution(
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input_state.video_codec_type(),
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input_state.frame_size_pixels().value(),
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encoder_target_bitrate_bps_.value_or(0))) {
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return false;
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}
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return true;
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}
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} // namespace webrtc
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