1 /* 2 * Copyright (c) 2019 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include "modules/audio_processing/ns/suppression_params.h" 12 13 #include "rtc_base/checks.h" 14 15 namespace webrtc { 16 SuppressionParams(NsConfig::SuppressionLevel suppression_level)17SuppressionParams::SuppressionParams( 18 NsConfig::SuppressionLevel suppression_level) { 19 switch (suppression_level) { 20 case NsConfig::SuppressionLevel::k6dB: 21 over_subtraction_factor = 1.f; 22 // 6 dB attenuation. 23 minimum_attenuating_gain = 0.5f; 24 use_attenuation_adjustment = false; 25 break; 26 case NsConfig::SuppressionLevel::k12dB: 27 over_subtraction_factor = 1.f; 28 // 12 dB attenuation. 29 minimum_attenuating_gain = 0.25f; 30 use_attenuation_adjustment = true; 31 break; 32 case NsConfig::SuppressionLevel::k18dB: 33 over_subtraction_factor = 1.1f; 34 // 18 dB attenuation. 35 minimum_attenuating_gain = 0.125f; 36 use_attenuation_adjustment = true; 37 break; 38 case NsConfig::SuppressionLevel::k21dB: 39 over_subtraction_factor = 1.25f; 40 // 20.9 dB attenuation. 41 minimum_attenuating_gain = 0.09f; 42 use_attenuation_adjustment = true; 43 break; 44 default: 45 RTC_NOTREACHED(); 46 } 47 } 48 49 } // namespace webrtc 50