suppression_params.cc (1587B)
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 "modules/audio_processing/ns/ns_config.h" 14 #include "rtc_base/checks.h" 15 16 namespace webrtc { 17 18 SuppressionParams::SuppressionParams( 19 NsConfig::SuppressionLevel suppression_level) { 20 switch (suppression_level) { 21 case NsConfig::SuppressionLevel::k6dB: 22 over_subtraction_factor = 1.f; 23 // 6 dB attenuation. 24 minimum_attenuating_gain = 0.5f; 25 use_attenuation_adjustment = false; 26 break; 27 case NsConfig::SuppressionLevel::k12dB: 28 over_subtraction_factor = 1.f; 29 // 12 dB attenuation. 30 minimum_attenuating_gain = 0.25f; 31 use_attenuation_adjustment = true; 32 break; 33 case NsConfig::SuppressionLevel::k18dB: 34 over_subtraction_factor = 1.1f; 35 // 18 dB attenuation. 36 minimum_attenuating_gain = 0.125f; 37 use_attenuation_adjustment = true; 38 break; 39 case NsConfig::SuppressionLevel::k21dB: 40 over_subtraction_factor = 1.25f; 41 // 20.9 dB attenuation. 42 minimum_attenuating_gain = 0.09f; 43 use_attenuation_adjustment = true; 44 break; 45 default: 46 RTC_DCHECK_NOTREACHED(); 47 } 48 } 49 50 } // namespace webrtc