1 /* 2 * Copyright (c) 2017 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 #ifndef MODULES_AUDIO_PROCESSING_AGC2_GAIN_CONTROLLER2_H_ 12 #define MODULES_AUDIO_PROCESSING_AGC2_GAIN_CONTROLLER2_H_ 13 14 #include <memory> 15 #include <string> 16 17 #include "modules/audio_processing/include/audio_processing.h" 18 #include "rtc_base/constructormagic.h" 19 20 namespace webrtc { 21 22 class ApmDataDumper; 23 class AudioBuffer; 24 25 // Gain Controller 2 aims to automatically adjust levels by acting on the 26 // microphone gain and/or applying digital gain. 27 // 28 // Temporarily implements a fixed gain mode with hard-clipping. 29 class GainController2 { 30 public: 31 GainController2(); 32 ~GainController2(); 33 34 void Initialize(int sample_rate_hz); 35 void Process(AudioBuffer* audio); 36 37 void ApplyConfig(const AudioProcessing::Config::GainController2& config); 38 static bool Validate(const AudioProcessing::Config::GainController2& config); 39 static std::string ToString( 40 const AudioProcessing::Config::GainController2& config); 41 42 private: 43 static int instance_count_; 44 std::unique_ptr<ApmDataDumper> data_dumper_; 45 int sample_rate_hz_; 46 float fixed_gain_; 47 48 RTC_DISALLOW_COPY_AND_ASSIGN(GainController2); 49 }; 50 51 } // namespace webrtc 52 53 #endif // MODULES_AUDIO_PROCESSING_AGC2_GAIN_CONTROLLER2_H_ 54