neural_feature_extractor.h (1632B)
1 /* 2 * Copyright (c) 2025 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_NEURAL_FEATURE_EXTRACTOR_H_ 12 #define MODULES_AUDIO_PROCESSING_AEC3_NEURAL_FEATURE_EXTRACTOR_H_ 13 14 #include <vector> 15 16 #include "api/array_view.h" 17 #include "third_party/pffft/src/pffft.h" 18 namespace webrtc { 19 20 class FeatureExtractor { 21 public: 22 virtual ~FeatureExtractor() = default; 23 virtual void PushFeaturesToModelInput(std::vector<float>& frame, 24 ArrayView<float> input) = 0; 25 }; 26 27 class TimeDomainFeatureExtractor : public FeatureExtractor { 28 void PushFeaturesToModelInput(std::vector<float>& frame, 29 ArrayView<float> input) override; 30 }; 31 32 class FrequencyDomainFeatureExtractor : public FeatureExtractor { 33 public: 34 explicit FrequencyDomainFeatureExtractor(int step_size); 35 ~FrequencyDomainFeatureExtractor(); 36 void PushFeaturesToModelInput(std::vector<float>& frame, 37 ArrayView<float> input) override; 38 39 private: 40 const int step_size_; 41 const int frame_size_; 42 const std::vector<float> sqrt_hanning_; 43 float* const data_; 44 float* const spectrum_; 45 PFFFT_Setup* pffft_setup_; 46 }; 47 48 } // namespace webrtc 49 #endif // MODULES_AUDIO_PROCESSING_AEC3_NEURAL_FEATURE_EXTRACTOR_H_