e4db6a1518
This CL adds a functionality that jump-starts the AEC3 shadow filter whenever it performs consistently worse than the main filter. The jump-start is done such that the shadow filter is re-initialized using the main filter coefficients. The effects of this is a significantly more accurate main linear filter which leads to less echo leakage and better transparency Bug: webrtc:9565, chromium:867873 Change-Id: Ie0b23cd536adc7ce96fc3ed2a7db112aec7437f1 Reviewed-on: https://webrtc-review.googlesource.com/90413 Reviewed-by: Sam Zackrisson <saza@webrtc.org> Commit-Queue: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#24117}
38 lines
1.2 KiB
C++
38 lines
1.2 KiB
C++
/*
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* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "modules/audio_processing/aec3/subtractor_output_analyzer.h"
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#include <array>
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#include <numeric>
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namespace webrtc {
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void SubtractorOutputAnalyzer::Update(
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const SubtractorOutput& subtractor_output) {
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const float y2 = subtractor_output.y2;
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const float e2_main = subtractor_output.e2_main;
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const float e2_shadow = subtractor_output.e2_shadow;
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constexpr float kConvergenceThreshold = 50 * 50 * kBlockSize;
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main_filter_converged_ = e2_main < 0.5f * y2 && y2 > kConvergenceThreshold;
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shadow_filter_converged_ =
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e2_shadow < 0.05 * y2 && y2 > kConvergenceThreshold;
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main_filter_diverged_ = e2_main > 1.5f * y2 && y2 > 30.f * 30.f * kBlockSize;
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}
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void SubtractorOutputAnalyzer::HandleEchoPathChange() {
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shadow_filter_converged_ = false;
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main_filter_converged_ = false;
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main_filter_diverged_ = false;
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}
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} // namespace webrtc
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