5ea5749a86
This change adds multichannel support to the AEC3 suppressor. Processing of mono capture is bit-exact to the previous code. Bug: webrtc:10913 Change-Id: I89affe3e066021bc34e4b525edf44dd3bea68365 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/158882 Commit-Queue: Gustaf Ullberg <gustaf@webrtc.org> Reviewed-by: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29692}
57 lines
1.9 KiB
C++
57 lines
1.9 KiB
C++
/*
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* Copyright (c) 2019 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_DOMINANT_NEAREND_DETECTOR_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_DOMINANT_NEAREND_DETECTOR_H_
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#include <vector>
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#include "api/array_view.h"
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#include "api/audio/echo_canceller3_config.h"
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#include "modules/audio_processing/aec3/aec3_common.h"
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namespace webrtc {
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// Class for selecting whether the suppressor is in the nearend or echo state.
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class DominantNearendDetector {
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public:
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DominantNearendDetector(
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const EchoCanceller3Config::Suppressor::DominantNearendDetection config,
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size_t num_capture_channels);
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// Returns whether the current state is the nearend state.
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bool IsNearendState() const { return nearend_state_; }
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// Updates the state selection based on latest spectral estimates.
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void Update(rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>>
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nearend_spectrum,
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rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>>
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residual_echo_spectrum,
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rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>>
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comfort_noise_spectrum,
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bool initial_state);
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private:
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const float enr_threshold_;
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const float enr_exit_threshold_;
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const float snr_threshold_;
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const int hold_duration_;
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const int trigger_threshold_;
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const bool use_during_initial_phase_;
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const size_t num_capture_channels_;
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bool nearend_state_ = false;
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std::vector<int> trigger_counters_;
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std::vector<int> hold_counters_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_DOMINANT_NEAREND_DETECTOR_H_
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