1 /* 2 * Copyright (c) 2021 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef MODULES_AUDIO_CODING_NETEQ_REORDER_OPTIMIZER_H_ 12 #define MODULES_AUDIO_CODING_NETEQ_REORDER_OPTIMIZER_H_ 13 14 #include "absl/types/optional.h" 15 #include "modules/audio_coding/neteq/histogram.h" 16 17 namespace webrtc { 18 19 // Calculates an optimal delay to reduce the chance of missing reordered 20 // packets. The delay/loss trade-off can be tune using the `ms_per_loss_percent` 21 // parameter. 22 class ReorderOptimizer { 23 public: 24 ReorderOptimizer(int forget_factor, 25 int ms_per_loss_percent, 26 absl::optional<int> start_forget_weight); 27 28 void Update(int relative_delay_ms, bool reordered, int base_delay_ms); 29 GetOptimalDelayMs()30 absl::optional<int> GetOptimalDelayMs() const { return optimal_delay_ms_; } 31 32 void Reset(); 33 34 private: 35 int MinimizeCostFunction(int base_delay_ms) const; 36 37 Histogram histogram_; 38 const int ms_per_loss_percent_; 39 absl::optional<int> optimal_delay_ms_; 40 }; 41 42 } // namespace webrtc 43 #endif // MODULES_AUDIO_CODING_NETEQ_REORDER_OPTIMIZER_H_ 44