86afe9d661
This CL adds fairly significant changes to the echo removal functionality, the main ones being. -More centralized control over the echo removal. -Updated echo suppression gain behavior. -Significantly increased usage of the linear adaptive filter. -New echo removal functionality when the linear filter is not usable. This CL is chained to the CL https://codereview.webrtc.org/2784023002/ BUG=webrtc:6018 Review-Url: https://codereview.webrtc.org/2782423003 Cr-Commit-Position: refs/heads/master@{#17575}
69 lines
2.5 KiB
C++
69 lines
2.5 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_SUBTRACTOR_H_
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#define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_SUBTRACTOR_H_
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#include <array>
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#include <algorithm>
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#include <vector>
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#include "webrtc/base/constructormagic.h"
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#include "webrtc/modules/audio_processing/aec3/adaptive_fir_filter.h"
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#include "webrtc/modules/audio_processing/aec3/aec3_common.h"
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#include "webrtc/modules/audio_processing/aec3/aec3_fft.h"
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#include "webrtc/modules/audio_processing/aec3/aec_state.h"
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#include "webrtc/modules/audio_processing/aec3/echo_path_variability.h"
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#include "webrtc/modules/audio_processing/aec3/main_filter_update_gain.h"
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#include "webrtc/modules/audio_processing/aec3/render_buffer.h"
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#include "webrtc/modules/audio_processing/aec3/shadow_filter_update_gain.h"
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#include "webrtc/modules/audio_processing/aec3/subtractor_output.h"
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#include "webrtc/modules/audio_processing/logging/apm_data_dumper.h"
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#include "webrtc/modules/audio_processing/utility/ooura_fft.h"
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namespace webrtc {
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// Proves linear echo cancellation functionality
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class Subtractor {
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public:
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Subtractor(ApmDataDumper* data_dumper, Aec3Optimization optimization);
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~Subtractor();
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// Performs the echo subtraction.
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void Process(const RenderBuffer& render_buffer,
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const rtc::ArrayView<const float> capture,
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const RenderSignalAnalyzer& render_signal_analyzer,
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const AecState& aec_state,
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SubtractorOutput* output);
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void HandleEchoPathChange(const EchoPathVariability& echo_path_variability);
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// Returns the block-wise frequency response of the main adaptive filter.
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const std::vector<std::array<float, kFftLengthBy2Plus1>>&
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FilterFrequencyResponse() const {
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return main_filter_.FilterFrequencyResponse();
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}
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private:
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const Aec3Fft fft_;
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ApmDataDumper* data_dumper_;
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const Aec3Optimization optimization_;
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AdaptiveFirFilter main_filter_;
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AdaptiveFirFilter shadow_filter_;
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MainFilterUpdateGain G_main_;
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ShadowFilterUpdateGain G_shadow_;
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RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(Subtractor);
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_SUBTRACTOR_H_
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