59 lines
2.1 KiB
C++
59 lines
2.1 KiB
C++
/*
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* Copyright 2018 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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#ifndef RTC_BASE_EXPERIMENTS_QUALITY_SCALING_EXPERIMENT_H_
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#define RTC_BASE_EXPERIMENTS_QUALITY_SCALING_EXPERIMENT_H_
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#include "absl/types/optional.h"
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#include "api/video_codecs/video_encoder.h"
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namespace webrtc {
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class QualityScalingExperiment {
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public:
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struct Settings {
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int vp8_low; // VP8: low QP threshold.
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int vp8_high; // VP8: high QP threshold.
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int vp9_low; // VP9: low QP threshold.
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int vp9_high; // VP9: high QP threshold.
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int h264_low; // H264: low QP threshold.
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int h264_high; // H264: high QP threshold.
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int generic_low; // Generic: low QP threshold.
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int generic_high; // Generic: high QP threshold.
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float alpha_high; // |alpha_| for ExpFilter used when checking high QP.
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float alpha_low; // |alpha_| for ExpFilter used when checking low QP.
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int drop; // >0 sets |use_all_drop_reasons| to true.
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};
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// Used by QualityScaler.
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struct Config {
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float alpha_high = 0.9995f;
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float alpha_low = 0.9999f;
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// If set, all type of dropped frames are used.
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// Otherwise only dropped frames by MediaOptimization are used.
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bool use_all_drop_reasons = false;
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};
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// Returns true if the experiment is enabled.
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static bool Enabled();
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// Returns settings from field trial.
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static absl::optional<Settings> ParseSettings();
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// Returns QpThresholds for the |codec_type|.
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static absl::optional<VideoEncoder::QpThresholds> GetQpThresholds(
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VideoCodecType codec_type);
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// Returns parsed values. If the parsing fails, default values are returned.
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static Config GetConfig();
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};
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} // namespace webrtc
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#endif // RTC_BASE_EXPERIMENTS_QUALITY_SCALING_EXPERIMENT_H_
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