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4869bd6309
Bug: none Change-Id: Ibeded1f7193384a8ae5bd3f2ce4ccaa4c7db7290 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/150333 Reviewed-by: Mirta Dvornicic <mirtad@webrtc.org> Commit-Queue: Åsa Persson <asapersson@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28957}
106 lines
3.4 KiB
C++
106 lines
3.4 KiB
C++
/*
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* Copyright 2019 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_BALANCED_DEGRADATION_SETTINGS_H_
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#define RTC_BASE_EXPERIMENTS_BALANCED_DEGRADATION_SETTINGS_H_
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#include <vector>
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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 BalancedDegradationSettings {
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public:
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static constexpr int kNoFpsDiff = -100;
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BalancedDegradationSettings();
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~BalancedDegradationSettings();
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struct CodecTypeSpecific {
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CodecTypeSpecific() {}
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CodecTypeSpecific(int qp_low, int qp_high, int fps)
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: qp_low(qp_low), qp_high(qp_high), fps(fps) {}
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bool operator==(const CodecTypeSpecific& o) const {
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return qp_low == o.qp_low && qp_high == o.qp_high && fps == o.fps;
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}
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absl::optional<int> GetQpLow() const;
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absl::optional<int> GetQpHigh() const;
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absl::optional<int> GetFps() const;
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int qp_low = 0;
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int qp_high = 0;
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int fps = 0;
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};
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struct Config {
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Config();
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Config(int pixels,
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int fps,
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int kbps,
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int fps_diff,
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CodecTypeSpecific vp8,
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CodecTypeSpecific vp9,
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CodecTypeSpecific h264,
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CodecTypeSpecific generic);
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bool operator==(const Config& o) const {
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return pixels == o.pixels && fps == o.fps && kbps == o.kbps &&
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fps_diff == o.fps_diff && vp8 == o.vp8 && vp9 == o.vp9 &&
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h264 == o.h264 && generic == o.generic;
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}
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int pixels = 0; // Video frame size.
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// If the frame size is less than or equal to |pixels|:
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int fps = 0; // Min framerate to be used.
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int kbps = 0; // Min bitrate needed to adapt up to this resolution.
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int fps_diff = kNoFpsDiff; // Min fps reduction needed (input fps - |fps|)
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// w/o triggering a new subsequent downgrade
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// check.
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CodecTypeSpecific vp8;
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CodecTypeSpecific vp9;
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CodecTypeSpecific h264;
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CodecTypeSpecific generic;
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};
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// Returns configurations from field trial on success (default on failure).
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std::vector<Config> GetConfigs() const;
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// Gets the min/max framerate from |configs_| based on |pixels|.
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int MinFps(VideoCodecType type, int pixels) const;
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int MaxFps(VideoCodecType type, int pixels) const;
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// Gets the bitrate for the first resolution above |pixels|.
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absl::optional<int> NextHigherBitrateKbps(int pixels) const;
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// Checks if quality can be increased based on |pixels| and |bitrate_bps|.
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bool CanAdaptUp(int pixels, uint32_t bitrate_bps) const;
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// Gets the min framerate diff from |configs_| based on |pixels|.
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absl::optional<int> MinFpsDiff(int pixels) const;
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// Gets QpThresholds for the codec |type| based on |pixels|.
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absl::optional<VideoEncoder::QpThresholds> GetQpThresholds(
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VideoCodecType type,
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int pixels) const;
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private:
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absl::optional<Config> GetMinFpsConfig(int pixels) const;
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absl::optional<Config> GetMaxFpsConfig(int pixels) const;
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Config GetConfig(int pixels) const;
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std::vector<Config> configs_;
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};
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} // namespace webrtc
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#endif // RTC_BASE_EXPERIMENTS_BALANCED_DEGRADATION_SETTINGS_H_
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