clockdrift_detector.h (1158B)
1 /* 2 * Copyright (c) 2018 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_PROCESSING_AEC3_CLOCKDRIFT_DETECTOR_H_ 12 #define MODULES_AUDIO_PROCESSING_AEC3_CLOCKDRIFT_DETECTOR_H_ 13 14 #include <stddef.h> 15 16 #include <array> 17 18 namespace webrtc { 19 20 class ApmDataDumper; 21 struct DownsampledRenderBuffer; 22 struct EchoCanceller3Config; 23 24 // Detects clockdrift by analyzing the estimated delay. 25 class ClockdriftDetector { 26 public: 27 enum class Level { kNone, kProbable, kVerified, kNumCategories }; 28 ClockdriftDetector(); 29 ~ClockdriftDetector(); 30 void Update(int delay_estimate); 31 Level ClockdriftLevel() const { return level_; } 32 33 private: 34 std::array<int, 3> delay_history_; 35 Level level_; 36 size_t stability_counter_; 37 }; 38 } // namespace webrtc 39 40 #endif // MODULES_AUDIO_PROCESSING_AEC3_CLOCKDRIFT_DETECTOR_H_