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7ddd46386a
This CL balances the NLP tradeoff in AEC3 to properly handle the cases when the echo path is so strong that it saturates the echo and when it is so weak that the echo is very low compared to nearend. Bug: webrtc:8411, webrtc:8412, chromium:775653 Change-Id: I5aff74dfadd51cac1ce71b1cb935d68a5be6918d Reviewed-on: https://webrtc-review.googlesource.com/14120 Commit-Queue: Per Åhgren <peah@webrtc.org> Reviewed-by: Per Åhgren <peah@webrtc.org> Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20418}
71 lines
2.7 KiB
C++
71 lines
2.7 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 "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 "modules/audio_processing/include/audio_processing.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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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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bool saturated_echo,
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bool saturating_echo_path,
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bool linear_echo_estimate,
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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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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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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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size_t no_saturation_counter_ = 0;
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const EchoCanceller3Config config_;
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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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