| /* |
| * 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 <algorithm> |
| |
| #include "modules/audio_processing/aec3/aec3_common.h" |
| |
| namespace webrtc { |
| |
| SubtractorOutputAnalyzer::SubtractorOutputAnalyzer() {} |
| |
| 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 = std::min(e2_main, e2_shadow); |
| 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 |