Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 63 insertions, 0 deletions

diff --git a/third_party/libwebrtc/modules/congestion_controller/goog_cc/bitrate_estimator.h b/third_party/libwebrtc/modules/congestion_controller/goog_cc/bitrate_estimator.h
new file mode 100644
index 0000000000..5ca8234ba8
--- /dev/null
+++ b/third_party/libwebrtc/modules/congestion_controller/goog_cc/bitrate_estimator.h
@@ -0,0 +1,63 @@
+/*
+ *  Copyright (c) 2017 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_GOOG_CC_BITRATE_ESTIMATOR_H_
+#define MODULES_CONGESTION_CONTROLLER_GOOG_CC_BITRATE_ESTIMATOR_H_
+
+#include <stdint.h>
+
+#include "absl/types/optional.h"
+#include "api/field_trials_view.h"
+#include "api/units/data_rate.h"
+#include "api/units/data_size.h"
+#include "api/units/timestamp.h"
+#include "rtc_base/experiments/field_trial_parser.h"
+
+namespace webrtc {
+
+// Computes a bayesian estimate of the throughput given acks containing
+// the arrival time and payload size. Samples which are far from the current
+// estimate or are based on few packets are given a smaller weight, as they
+// are considered to be more likely to have been caused by, e.g., delay spikes
+// unrelated to congestion.
+class BitrateEstimator {
+ public:
+  explicit BitrateEstimator(const FieldTrialsView* key_value_config);
+  virtual ~BitrateEstimator();
+  virtual void Update(Timestamp at_time, DataSize amount, bool in_alr);
+
+  virtual absl::optional<DataRate> bitrate() const;
+  absl::optional<DataRate> PeekRate() const;
+
+  virtual void ExpectFastRateChange();
+
+ private:
+  float UpdateWindow(int64_t now_ms,
+                     int bytes,
+                     int rate_window_ms,
+                     bool* is_small_sample);
+  int sum_;
+  FieldTrialConstrained<int> initial_window_ms_;
+  FieldTrialConstrained<int> noninitial_window_ms_;
+  FieldTrialParameter<double> uncertainty_scale_;
+  FieldTrialParameter<double> uncertainty_scale_in_alr_;
+  FieldTrialParameter<double> small_sample_uncertainty_scale_;
+  FieldTrialParameter<DataSize> small_sample_threshold_;
+  FieldTrialParameter<DataRate> uncertainty_symmetry_cap_;
+  FieldTrialParameter<DataRate> estimate_floor_;
+  int64_t current_window_ms_;
+  int64_t prev_time_ms_;
+  float bitrate_estimate_kbps_;
+  float bitrate_estimate_var_;
+};
+
+}  // namespace webrtc
+
+#endif  // MODULES_CONGESTION_CONTROLLER_GOOG_CC_BITRATE_ESTIMATOR_H_