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_AEC3_REVERB_FREQUENCY_RESPONSE_H_ 12 #define MODULES_AUDIO_PROCESSING_AEC3_REVERB_FREQUENCY_RESPONSE_H_ 13 14 #include <array> 15 #include <vector> 16 17 #include "absl/types/optional.h" 18 #include "api/array_view.h" 19 #include "modules/audio_processing/aec3/aec3_common.h" 20 21 namespace webrtc { 22 23 // Class for updating the frequency response for the reverb. 24 class ReverbFrequencyResponse { 25 public: 26 explicit ReverbFrequencyResponse( 27 bool use_conservative_tail_frequency_response); 28 ~ReverbFrequencyResponse(); 29 30 // Updates the frequency response estimate of the reverb. 31 void Update(const std::vector<std::array<float, kFftLengthBy2Plus1>>& 32 frequency_response, 33 int filter_delay_blocks, 34 const absl::optional<float>& linear_filter_quality, 35 bool stationary_block); 36 37 // Returns the estimated frequency response for the reverb. FrequencyResponse()38 rtc::ArrayView<const float> FrequencyResponse() const { 39 return tail_response_; 40 } 41 42 private: 43 void Update(const std::vector<std::array<float, kFftLengthBy2Plus1>>& 44 frequency_response, 45 int filter_delay_blocks, 46 float linear_filter_quality); 47 48 const bool use_conservative_tail_frequency_response_; 49 float average_decay_ = 0.f; 50 std::array<float, kFftLengthBy2Plus1> tail_response_; 51 }; 52 53 } // namespace webrtc 54 55 #endif // MODULES_AUDIO_PROCESSING_AEC3_REVERB_FREQUENCY_RESPONSE_H_ 56