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6204adf2ed
This CL lowers the margins in the AEC3 conservative mode to increase the transparency when there are audio buffer issues, and during call startup. In particular, this CL adjusts the parameters and thresholds to -Make the requirements for filter divergence more strict, to minimize the transparency loss during minor filter divergence. -Decrease the echo power uncertainty used during initial filter convergence, to increase transparency after audio buffer issues. -Deactivate the enforcement of conservative suppressor gain after audio buffer. Bug: webrtc:9641,chromium:875611 Change-Id: Ie171bb411f17a1e8661c291118debd334f65c74f Reviewed-on: https://webrtc-review.googlesource.com/94776 Commit-Queue: Per Åhgren <peah@webrtc.org> Reviewed-by: Jesus de Vicente Pena <devicentepena@webrtc.org> Reviewed-by: Henrik Lundin <henrik.lundin@webrtc.org> Cr-Commit-Position: refs/heads/master@{#24333}
58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
/*
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* Copyright (c) 2018 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_LIMITER_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_SUPPRESSION_GAIN_LIMITER_H_
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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 "rtc_base/constructormagic.h"
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namespace webrtc {
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// Class for applying a smoothly increasing limit for the suppression gain
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// during call startup and after in-call resets.
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class SuppressionGainUpperLimiter {
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public:
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explicit SuppressionGainUpperLimiter(const EchoCanceller3Config& config);
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// Reset the limiting behavior.
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void Reset();
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// Updates the limiting behavior for the current capture bloc.
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void Update(bool render_activity, bool transparent_mode);
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// Returns the current suppressor gain limit.
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float Limit() const { return suppressor_gain_limit_; }
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// Return whether the suppressor gain limit is active.
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bool IsActive() const { return (realignment_counter_ > 0); }
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// Inactivate limiter.
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void Deactivate() {
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realignment_counter_ = 0;
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suppressor_gain_limit_ = 1.f;
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}
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private:
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const EchoCanceller3Config::EchoRemovalControl::GainRampup rampup_config_;
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const float gain_rampup_increase_;
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bool call_startup_phase_ = true;
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int realignment_counter_ = 0;
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bool active_render_seen_ = false;
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float suppressor_gain_limit_ = 1.f;
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bool recent_reset_ = false;
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RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(SuppressionGainUpperLimiter);
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_SUPPRESSION_GAIN_LIMITER_H_
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