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In this work the performance of the linear filter is estimated. The estimation aims at capture situations when the linear filter is largely over-estimating the echo. In those circumstances, the linear filter is scaled with the purpose of accelerating its convergence. Change-Id: I05ea3739d82838a6f08673432da92125c47943e0 Bug: webrtc:9466,chromium:857426 Reviewed-on: https://webrtc-review.googlesource.com/86133 Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org> Commit-Queue: Jesus de Vicente Pena <devicentepena@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23789}
61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
/*
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* Copyright (c) 2017 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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#ifndef MODULES_AUDIO_PROCESSING_AEC3_SUBTRACTOR_OUTPUT_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_SUBTRACTOR_OUTPUT_H_
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#include <array>
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#include "modules/audio_processing/aec3/aec3_common.h"
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#include "modules/audio_processing/aec3/fft_data.h"
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namespace webrtc {
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// Stores the values being returned from the echo subtractor.
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struct SubtractorOutput {
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std::array<float, kBlockSize> s_main;
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std::array<float, kBlockSize> e_main;
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std::array<float, kBlockSize> e_shadow;
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FftData E_main;
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std::array<float, kFftLengthBy2Plus1> E2_main;
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std::array<float, kFftLengthBy2Plus1> E2_shadow;
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void Reset() {
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s_main.fill(0.f);
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e_main.fill(0.f);
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e_shadow.fill(0.f);
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E_main.re.fill(0.f);
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E_main.im.fill(0.f);
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E2_main.fill(0.f);
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E2_shadow.fill(0.f);
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}
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void ScaleOutputMainFilter(float factor) {
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for (auto& s : s_main) {
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s *= factor;
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}
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for (auto& e : e_main) {
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e *= factor;
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}
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for (auto& E2 : E2_main) {
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E2 *= factor * factor;
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}
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for (auto& re : E_main.re) {
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re *= factor;
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}
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for (auto& im : E_main.im) {
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im *= factor;
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}
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}
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_SUBTRACTOR_OUTPUT_H_
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