14c11a4712
This CL adds detection of components in the render signal that are of strong narrowband nature and therefore may cause problems for the AEC. This CL also adds functionality in the echo suppressor to suppress these signals BUG=webrtc:7967 Review-Url: https://codereview.webrtc.org/2980493002 Cr-Commit-Position: refs/heads/master@{#18968}
59 lines
2.0 KiB
C++
59 lines
2.0 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 WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_RENDER_SIGNAL_ANALYZER_H_
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#define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_RENDER_SIGNAL_ANALYZER_H_
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#include <array>
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#include <memory>
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#include "webrtc/modules/audio_processing/aec3/aec3_common.h"
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#include "webrtc/modules/audio_processing/aec3/render_buffer.h"
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#include "webrtc/rtc_base/constructormagic.h"
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#include "webrtc/rtc_base/optional.h"
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namespace webrtc {
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// Provides functionality for analyzing the properties of the render signal.
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class RenderSignalAnalyzer {
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public:
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RenderSignalAnalyzer();
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~RenderSignalAnalyzer();
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// Updates the render signal analysis with the most recent render signal.
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void Update(const RenderBuffer& render_buffer,
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const rtc::Optional<size_t>& delay_partitions);
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// Returns true if the render signal is poorly exciting.
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bool PoorSignalExcitation() const {
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RTC_DCHECK_LT(2, narrow_band_counters_.size());
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return std::any_of(narrow_band_counters_.begin(),
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narrow_band_counters_.end(),
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[](size_t a) { return a > 10; });
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}
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// Zeros the array around regions with narrow bands signal characteristics.
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void MaskRegionsAroundNarrowBands(
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std::array<float, kFftLengthBy2Plus1>* v) const;
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rtc::Optional<int> NarrowPeakBand() const { return narrow_peak_band_; }
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private:
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std::array<size_t, kFftLengthBy2 - 1> narrow_band_counters_;
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rtc::Optional<int> narrow_peak_band_;
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size_t narrow_peak_counter_;
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RTC_DISALLOW_COPY_AND_ASSIGN(RenderSignalAnalyzer);
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_RENDER_SIGNAL_ANALYZER_H_
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