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/*
* Copyright (c) 2019 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.
*/
#ifndef RTC_BASE_EXPERIMENTS_RATE_CONTROL_SETTINGS_H_
#define RTC_BASE_EXPERIMENTS_RATE_CONTROL_SETTINGS_H_
#include "absl/types/optional.h"
#include "api/transport/webrtc_key_value_config.h"
#include "api/video_codecs/video_codec.h"
#include "api/video_codecs/video_encoder_config.h"
#include "rtc_base/experiments/field_trial_parser.h"
#include "rtc_base/experiments/field_trial_units.h"
namespace webrtc {
class RateControlSettings final {
public:
~RateControlSettings();
RateControlSettings(RateControlSettings&&);
static RateControlSettings ParseFromFieldTrials();
static RateControlSettings ParseFromKeyValueConfig(
const WebRtcKeyValueConfig* const key_value_config);
// When CongestionWindowPushback is enabled, the pacer is oblivious to
// the congestion window. The relation between outstanding data and
// the congestion window affects encoder allocations directly.
bool UseCongestionWindow() const;
int64_t GetCongestionWindowAdditionalTimeMs() const;
bool UseCongestionWindowPushback() const;
uint32_t CongestionWindowMinPushbackTargetBitrateBps() const;
absl::optional<double> GetPacingFactor() const;
bool UseAlrProbing() const;
bool LibvpxVp8TrustedRateController() const;
bool LibvpxVp9TrustedRateController() const;
// TODO(bugs.webrtc.org/10272): Remove one of these when we have merged
// VideoCodecMode and VideoEncoderConfig::ContentType.
double GetSimulcastHysteresisFactor(VideoCodecMode mode) const;
double GetSimulcastHysteresisFactor(
VideoEncoderConfig::ContentType content_type) const;
bool TriggerProbeOnMaxAllocatedBitrateChange() const;
bool UseEncoderBitrateAdjuster() const;
private:
explicit RateControlSettings(
const WebRtcKeyValueConfig* const key_value_config);
double GetSimulcastVideoHysteresisFactor() const;
double GetSimulcastScreenshareHysteresisFactor() const;
FieldTrialOptional<int> congestion_window_;
FieldTrialOptional<int> congestion_window_pushback_;
FieldTrialOptional<double> pacing_factor_;
FieldTrialParameter<bool> alr_probing_;
FieldTrialParameter<bool> trust_vp8_;
FieldTrialParameter<bool> trust_vp9_;
FieldTrialParameter<double> video_hysteresis_;
FieldTrialParameter<double> screenshare_hysteresis_;
FieldTrialParameter<bool> probe_max_allocation_;
FieldTrialParameter<bool> bitrate_adjuster_;
};
} // namespace webrtc
#endif // RTC_BASE_EXPERIMENTS_RATE_CONTROL_SETTINGS_H_