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| 1 /* | 1 /* |
| 2 * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved. |
| 3 * | 3 * |
| 4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 */ | 9 */ |
| 10 | 10 |
| 11 #include "webrtc/common_audio/real_fourier_ooura.h" | 11 #include "webrtc/common_audio/real_fourier_ooura.h" |
| 12 | 12 |
| 13 #include <cmath> | 13 #include <cmath> |
| 14 #include <algorithm> | 14 #include <algorithm> |
| 15 | 15 |
| 16 #include "webrtc/base/checks.h" | |
| 17 #include "webrtc/common_audio/fft4g.h" | 16 #include "webrtc/common_audio/fft4g.h" |
| 17 #include "webrtc/rtc_base/checks.h" |
| 18 | 18 |
| 19 namespace webrtc { | 19 namespace webrtc { |
| 20 | 20 |
| 21 using std::complex; | 21 using std::complex; |
| 22 | 22 |
| 23 namespace { | 23 namespace { |
| 24 | 24 |
| 25 void Conjugate(complex<float>* array, size_t complex_length) { | 25 void Conjugate(complex<float>* array, size_t complex_length) { |
| 26 std::for_each(array, array + complex_length, | 26 std::for_each(array, array + complex_length, |
| 27 [=](complex<float>& v) { v = std::conj(v); }); | 27 [=](complex<float>& v) { v = std::conj(v); }); |
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| 76 } | 76 } |
| 77 | 77 |
| 78 WebRtc_rdft(length_, -1, dest, work_ip_.get(), work_w_.get()); | 78 WebRtc_rdft(length_, -1, dest, work_ip_.get(), work_w_.get()); |
| 79 | 79 |
| 80 // Ooura returns a scaled version. | 80 // Ooura returns a scaled version. |
| 81 const float scale = 2.0f / length_; | 81 const float scale = 2.0f / length_; |
| 82 std::for_each(dest, dest + length_, [scale](float& v) { v *= scale; }); | 82 std::for_each(dest, dest + length_, [scale](float& v) { v *= scale; }); |
| 83 } | 83 } |
| 84 | 84 |
| 85 } // namespace webrtc | 85 } // namespace webrtc |
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