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31122d6c5f
This CL changes the handling of saturated microphone signals in AEC3. Some of the changes included are -Make the detection of saturated echoes depend on the echo path gain estimate. -Remove redundant code related to echo saturation. -Correct the computation of residual echoes when the echo is saturated. -Soften the echo removal during echo saturation. Bug: webrtc:9119 Change-Id: I5cb11cd449de552ab670beeb24ed8112f8beb734 Reviewed-on: https://webrtc-review.googlesource.com/67220 Commit-Queue: Per Åhgren <peah@webrtc.org> Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22809}
83 lines
3 KiB
C++
83 lines
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_SUPPRESSION_GAIN_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_SUPPRESSION_GAIN_H_
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#include <array>
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#include <vector>
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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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#include "modules/audio_processing/aec3/aec_state.h"
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#include "modules/audio_processing/aec3/render_signal_analyzer.h"
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#include "rtc_base/constructormagic.h"
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namespace webrtc {
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class SuppressionGain {
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public:
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SuppressionGain(const EchoCanceller3Config& config,
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Aec3Optimization optimization);
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void GetGain(const std::array<float, kFftLengthBy2Plus1>& nearend,
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const std::array<float, kFftLengthBy2Plus1>& echo,
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const std::array<float, kFftLengthBy2Plus1>& comfort_noise,
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const RenderSignalAnalyzer& render_signal_analyzer,
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const AecState& aec_state,
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const std::vector<std::vector<float>>& render,
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float* high_bands_gain,
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std::array<float, kFftLengthBy2Plus1>* low_band_gain);
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// Toggles the usage of the initial state.
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void SetInitialState(bool state);
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private:
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void LowerBandGain(bool stationary_with_low_power,
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const rtc::Optional<int>& narrow_peak_band,
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const AecState& aec_state,
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const std::array<float, kFftLengthBy2Plus1>& nearend,
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const std::array<float, kFftLengthBy2Plus1>& echo,
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const std::array<float, kFftLengthBy2Plus1>& comfort_noise,
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std::array<float, kFftLengthBy2Plus1>* gain);
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// Limits the gain increase.
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void UpdateGainIncrease(
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bool low_noise_render,
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bool linear_echo_estimate,
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bool saturated_echo,
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const std::array<float, kFftLengthBy2Plus1>& echo,
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const std::array<float, kFftLengthBy2Plus1>& new_gain);
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class LowNoiseRenderDetector {
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public:
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bool Detect(const std::vector<std::vector<float>>& render);
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private:
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float average_power_ = 32768.f * 32768.f;
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};
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const Aec3Optimization optimization_;
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const EchoCanceller3Config config_;
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const int state_change_duration_blocks_;
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float one_by_state_change_duration_blocks_;
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std::array<float, kFftLengthBy2Plus1> last_gain_;
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std::array<float, kFftLengthBy2Plus1> last_masker_;
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std::array<float, kFftLengthBy2Plus1> gain_increase_;
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std::array<float, kFftLengthBy2Plus1> last_echo_;
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LowNoiseRenderDetector low_render_detector_;
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bool initial_state_ = true;
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int initial_state_change_counter_ = 0;
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RTC_DISALLOW_COPY_AND_ASSIGN(SuppressionGain);
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_SUPPRESSION_GAIN_H_
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