real_fourier_ooura.h (1318B)
1 /* 2 * Copyright (c) 2015 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 COMMON_AUDIO_REAL_FOURIER_OOURA_H_ 12 #define COMMON_AUDIO_REAL_FOURIER_OOURA_H_ 13 14 #include <stddef.h> 15 16 #include <complex> 17 #include <memory> 18 19 #include "common_audio/real_fourier.h" 20 21 namespace webrtc { 22 23 class RealFourierOoura : public RealFourier { 24 public: 25 explicit RealFourierOoura(int fft_order); 26 ~RealFourierOoura() override; 27 28 void Forward(const float* src, std::complex<float>* dest) const override; 29 void Inverse(const std::complex<float>* src, float* dest) const override; 30 31 int order() const override; 32 33 private: 34 const int order_; 35 const size_t length_; 36 const size_t complex_length_; 37 // These are work arrays for Ooura. The names are based on the comments in 38 // common_audio/third_party/ooura/fft_size_256/fft4g.cc. 39 const std::unique_ptr<size_t[]> work_ip_; 40 const std::unique_ptr<float[]> work_w_; 41 }; 42 43 } // namespace webrtc 44 45 #endif // COMMON_AUDIO_REAL_FOURIER_OOURA_H_