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 WEBRTC_COMMON_AUDIO_REAL_FOURIER_OOURA_H_ 12 #define WEBRTC_COMMON_AUDIO_REAL_FOURIER_OOURA_H_ 13 14 #include <complex> 15 16 #include "webrtc/base/scoped_ptr.h" 17 #include "webrtc/common_audio/real_fourier.h" 18 19 namespace webrtc { 20 21 class RealFourierOoura : public RealFourier { 22 public: 23 explicit RealFourierOoura(int fft_order); 24 25 void Forward(const float* src, std::complex<float>* dest) const override; 26 void Inverse(const std::complex<float>* src, float* dest) const override; 27 28 int order() const override { 29 return order_; 30 } 31 32 private: 33 const int order_; 34 const size_t length_; 35 const size_t complex_length_; 36 // These are work arrays for Ooura. The names are based on the comments in 37 // fft4g.c. 38 const rtc::scoped_ptr<size_t[]> work_ip_; 39 const rtc::scoped_ptr<float[]> work_w_; 40 }; 41 42 } // namespace webrtc 43 44 #endif // WEBRTC_COMMON_AUDIO_REAL_FOURIER_OOURA_H_ 45 46
