1 /* 2 * Copyright (c) 2018 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_ADAPTIVE_MODE_LEVEL_ESTIMATOR_AGC_H_ 12 #define MODULES_AUDIO_PROCESSING_AGC2_ADAPTIVE_MODE_LEVEL_ESTIMATOR_AGC_H_ 13 14 #include <stddef.h> 15 #include <stdint.h> 16 17 #include "modules/audio_processing/agc/agc.h" 18 #include "modules/audio_processing/agc2/adaptive_mode_level_estimator.h" 19 #include "modules/audio_processing/agc2/saturation_protector.h" 20 #include "modules/audio_processing/agc2/vad_with_level.h" 21 22 namespace webrtc { 23 class AdaptiveModeLevelEstimatorAgc : public Agc { 24 public: 25 explicit AdaptiveModeLevelEstimatorAgc(ApmDataDumper* apm_data_dumper); 26 27 // |audio| must be mono; in a multi-channel stream, provide the first (usually 28 // left) channel. 29 void Process(const int16_t* audio, 30 size_t length, 31 int sample_rate_hz) override; 32 33 // Retrieves the difference between the target RMS level and the current 34 // signal RMS level in dB. Returns true if an update is available and false 35 // otherwise, in which case |error| should be ignored and no action taken. 36 bool GetRmsErrorDb(int* error) override; 37 void Reset() override; 38 39 float voice_probability() const override; 40 41 private: 42 static constexpr int kTimeUntilConfidentMs = 700; 43 static constexpr int kDefaultAgc2LevelHeadroomDbfs = -1; 44 int32_t time_in_ms_since_last_estimate_ = 0; 45 AdaptiveModeLevelEstimator level_estimator_; 46 VadLevelAnalyzer agc2_vad_; 47 float latest_voice_probability_ = 0.f; 48 }; 49 } // namespace webrtc 50 51 #endif // MODULES_AUDIO_PROCESSING_AGC2_ADAPTIVE_MODE_LEVEL_ESTIMATOR_AGC_H_ 52