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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}
46 lines
1.3 KiB
C++
46 lines
1.3 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 "api/array_view.h"
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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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SubtractorOutput();
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~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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float e2_main = 0.f;
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float e2_shadow = 0.f;
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float y2 = 0.f;
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// Reset the struct content.
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void Reset();
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// Updates the powers of the signals.
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void UpdatePowers(rtc::ArrayView<const float> y);
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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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