1 files changed, 74 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/congestion_controller/pcc/bitrate_controller.h b/third_party/libwebrtc/modules/congestion_controller/pcc/bitrate_controller.h
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+++ b/third_party/libwebrtc/modules/congestion_controller/pcc/bitrate_controller.h
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+/*
+ *  Copyright (c) 2018 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 MODULES_CONGESTION_CONTROLLER_PCC_BITRATE_CONTROLLER_H_
+#define MODULES_CONGESTION_CONTROLLER_PCC_BITRATE_CONTROLLER_H_
+
+#include <stdint.h>
+
+#include <memory>
+#include <vector>
+
+#include "absl/types/optional.h"
+#include "api/units/data_rate.h"
+#include "modules/congestion_controller/pcc/monitor_interval.h"
+#include "modules/congestion_controller/pcc/utility_function.h"
+
+namespace webrtc {
+namespace pcc {
+
+class PccBitrateController {
+ public:
+  PccBitrateController(double initial_conversion_factor,
+                       double initial_dynamic_boundary,
+                       double dynamic_boundary_increment,
+                       double rtt_gradient_coefficient,
+                       double loss_coefficient,
+                       double throughput_coefficient,
+                       double throughput_power,
+                       double rtt_gradient_threshold,
+                       double delay_gradient_negative_bound);
+
+  PccBitrateController(
+      double initial_conversion_factor,
+      double initial_dynamic_boundary,
+      double dynamic_boundary_increment,
+      std::unique_ptr<PccUtilityFunctionInterface> utility_function);
+
+  absl::optional<DataRate> ComputeRateUpdateForSlowStartMode(
+      const PccMonitorInterval& monitor_interval);
+
+  DataRate ComputeRateUpdateForOnlineLearningMode(
+      const std::vector<PccMonitorInterval>& block,
+      DataRate bandwidth_estimate);
+
+  ~PccBitrateController();
+
+ private:
+  double ApplyDynamicBoundary(double rate_change, double bitrate);
+  double ComputeStepSize(double utility_gradient);
+
+  // Dynamic boundary variables:
+  int64_t consecutive_boundary_adjustments_number_;
+  const double initial_dynamic_boundary_;
+  const double dynamic_boundary_increment_;
+
+  const std::unique_ptr<PccUtilityFunctionInterface> utility_function_;
+  // Step Size variables:
+  int64_t step_size_adjustments_number_;
+  const double initial_conversion_factor_;
+
+  absl::optional<double> previous_utility_;
+};
+
+}  // namespace pcc
+}  // namespace webrtc
+
+#endif  // MODULES_CONGESTION_CONTROLLER_PCC_BITRATE_CONTROLLER_H_