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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_AUDIO_PROCESSING_AEC3_CLOCKDRIFT_DETECTOR_H_
#define MODULES_AUDIO_PROCESSING_AEC3_CLOCKDRIFT_DETECTOR_H_
#include <stddef.h>
#include <array>
namespace webrtc {
class ApmDataDumper;
struct DownsampledRenderBuffer;
struct EchoCanceller3Config;
// Detects clockdrift by analyzing the estimated delay.
class ClockdriftDetector {
public:
enum class Level { kNone, kProbable, kVerified, kNumCategories };
ClockdriftDetector();
~ClockdriftDetector();
void Update(int delay_estimate);
Level ClockdriftLevel() const { return level_; }
private:
std::array<int, 3> delay_history_;
Level level_;
size_t stability_counter_;
};
} // namespace webrtc
#endif // MODULES_AUDIO_PROCESSING_AEC3_CLOCKDRIFT_DETECTOR_H_