75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
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/*
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* Copyright (c) 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 MODULES_CONGESTION_CONTROLLER_PCC_BITRATE_CONTROLLER_H_
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#define MODULES_CONGESTION_CONTROLLER_PCC_BITRATE_CONTROLLER_H_
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#include <stdint.h>
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#include <memory>
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#include <vector>
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#include "absl/types/optional.h"
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#include "api/units/data_rate.h"
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#include "modules/congestion_controller/pcc/monitor_interval.h"
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#include "modules/congestion_controller/pcc/utility_function.h"
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namespace webrtc {
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namespace pcc {
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class PccBitrateController {
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public:
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PccBitrateController(double initial_conversion_factor,
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double initial_dynamic_boundary,
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double dynamic_boundary_increment,
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double rtt_gradient_coefficient,
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double loss_coefficient,
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double throughput_coefficient,
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double throughput_power,
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double rtt_gradient_threshold,
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double delay_gradient_negative_bound);
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PccBitrateController(
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double initial_conversion_factor,
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double initial_dynamic_boundary,
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double dynamic_boundary_increment,
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std::unique_ptr<PccUtilityFunctionInterface> utility_function);
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absl::optional<DataRate> ComputeRateUpdateForSlowStartMode(
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const PccMonitorInterval& monitor_interval);
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DataRate ComputeRateUpdateForOnlineLearningMode(
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const std::vector<PccMonitorInterval>& block,
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DataRate bandwidth_estimate);
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~PccBitrateController();
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private:
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double ApplyDynamicBoundary(double rate_change, double bitrate);
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double ComputeStepSize(double utility_gradient);
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// Dynamic boundary variables:
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int64_t consecutive_boundary_adjustments_number_;
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const double initial_dynamic_boundary_;
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const double dynamic_boundary_increment_;
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const std::unique_ptr<PccUtilityFunctionInterface> utility_function_;
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// Step Size variables:
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int64_t step_size_adjustments_number_;
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const double initial_conversion_factor_;
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absl::optional<double> previous_utility_;
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};
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} // namespace pcc
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} // namespace webrtc
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#endif // MODULES_CONGESTION_CONTROLLER_PCC_BITRATE_CONTROLLER_H_
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