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/*
* Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/audio_processing/ns/suppression_params.h"
#include "modules/audio_processing/ns/ns_config.h"
#include "rtc_base/checks.h"
namespace webrtc {
SuppressionParams::SuppressionParams(
NsConfig::SuppressionLevel suppression_level) {
switch (suppression_level) {
case NsConfig::SuppressionLevel::k6dB:
over_subtraction_factor = 1.f;
// 6 dB attenuation.
minimum_attenuating_gain = 0.5f;
use_attenuation_adjustment = false;
break;
case NsConfig::SuppressionLevel::k12dB:
over_subtraction_factor = 1.f;
// 12 dB attenuation.
minimum_attenuating_gain = 0.25f;
use_attenuation_adjustment = true;
break;
case NsConfig::SuppressionLevel::k18dB:
over_subtraction_factor = 1.1f;
// 18 dB attenuation.
minimum_attenuating_gain = 0.125f;
use_attenuation_adjustment = true;
break;
case NsConfig::SuppressionLevel::k21dB:
over_subtraction_factor = 1.25f;
// 20.9 dB attenuation.
minimum_attenuating_gain = 0.09f;
use_attenuation_adjustment = true;
break;
default:
RTC_DCHECK_NOTREACHED();
}
}
} // namespace webrtc
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