blob: 3cacb4563014a365a9a1e279f96c02ac64f1a1fb [file] [log] [blame]
/*
* 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.
*/
#include "modules/audio_processing/aec3/subtractor_output_analyzer.h"
#include <array>
#include <numeric>
#include "system_wrappers/include/field_trial.h"
namespace webrtc {
namespace {
bool EnableStrictDivergenceCheck() {
return !field_trial::IsEnabled("WebRTC-Aec3StrictDivergenceCheckKillSwitch");
}
} // namespace
SubtractorOutputAnalyzer::SubtractorOutputAnalyzer()
: strict_divergence_check_(EnableStrictDivergenceCheck()) {}
void SubtractorOutputAnalyzer::Update(
const SubtractorOutput& subtractor_output) {
const float y2 = subtractor_output.y2;
const float e2_main = subtractor_output.e2_main;
const float e2_shadow = subtractor_output.e2_shadow;
constexpr float kConvergenceThreshold = 50 * 50 * kBlockSize;
main_filter_converged_ = e2_main < 0.5f * y2 && y2 > kConvergenceThreshold;
shadow_filter_converged_ =
e2_shadow < 0.05f * y2 && y2 > kConvergenceThreshold;
float min_e2 =
strict_divergence_check_ ? std::min(e2_main, e2_shadow) : e2_main;
filter_diverged_ = min_e2 > 1.5f * y2 && y2 > 30.f * 30.f * kBlockSize;
}
void SubtractorOutputAnalyzer::HandleEchoPathChange() {
shadow_filter_converged_ = false;
main_filter_converged_ = false;
filter_diverged_ = false;
}
} // namespace webrtc