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https://github.com/danog/libtgvoip.git
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59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
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/*
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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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