andrew@webrtc.org | 325cff0 | 2014-10-01 17:42:18 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2014 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 | #include "webrtc/common_audio/real_fourier.h" |
| 12 | |
andrew@webrtc.org | 325cff0 | 2014-10-01 17:42:18 | [diff] [blame] | 13 | #include "webrtc/base/checks.h" |
andrew@webrtc.org | 04c5098 | 2015-03-19 20:06:29 | [diff] [blame] | 14 | #include "webrtc/common_audio/real_fourier_ooura.h" |
| 15 | #include "webrtc/common_audio/real_fourier_openmax.h" |
kwiberg | 729b21f | 2016-06-02 11:02:12 | [diff] [blame] | 16 | #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h" |
andrew@webrtc.org | 325cff0 | 2014-10-01 17:42:18 | [diff] [blame] | 17 | |
| 18 | namespace webrtc { |
| 19 | |
| 20 | using std::complex; |
| 21 | |
pkasting | 25702cb | 2016-01-08 21:50:27 | [diff] [blame] | 22 | const size_t RealFourier::kFftBufferAlignment = 32; |
andrew@webrtc.org | 325cff0 | 2014-10-01 17:42:18 | [diff] [blame] | 23 | |
kwiberg | bfefb03 | 2016-05-01 21:53:46 | [diff] [blame] | 24 | std::unique_ptr<RealFourier> RealFourier::Create(int fft_order) { |
andrew@webrtc.org | 04c5098 | 2015-03-19 20:06:29 | [diff] [blame] | 25 | #if defined(RTC_USE_OPENMAX_DL) |
kwiberg | bfefb03 | 2016-05-01 21:53:46 | [diff] [blame] | 26 | return std::unique_ptr<RealFourier>(new RealFourierOpenmax(fft_order)); |
andrew@webrtc.org | 04c5098 | 2015-03-19 20:06:29 | [diff] [blame] | 27 | #else |
kwiberg | bfefb03 | 2016-05-01 21:53:46 | [diff] [blame] | 28 | return std::unique_ptr<RealFourier>(new RealFourierOoura(fft_order)); |
andrew@webrtc.org | 04c5098 | 2015-03-19 20:06:29 | [diff] [blame] | 29 | #endif |
andrew@webrtc.org | 325cff0 | 2014-10-01 17:42:18 | [diff] [blame] | 30 | } |
| 31 | |
Peter Kasting | dce40cf | 2015-08-24 21:52:23 | [diff] [blame] | 32 | int RealFourier::FftOrder(size_t length) { |
henrikg | 91d6ede | 2015-09-17 07:24:34 | [diff] [blame] | 33 | RTC_CHECK_GT(length, 0U); |
Peter Kasting | b7e5054 | 2015-06-11 19:55:50 | [diff] [blame] | 34 | return WebRtcSpl_GetSizeInBits(static_cast<uint32_t>(length - 1)); |
andrew@webrtc.org | 04c5098 | 2015-03-19 20:06:29 | [diff] [blame] | 35 | } |
| 36 | |
Peter Kasting | dce40cf | 2015-08-24 21:52:23 | [diff] [blame] | 37 | size_t RealFourier::FftLength(int order) { |
henrikg | 91d6ede | 2015-09-17 07:24:34 | [diff] [blame] | 38 | RTC_CHECK_GE(order, 0); |
Peter Kasting | dce40cf | 2015-08-24 21:52:23 | [diff] [blame] | 39 | return static_cast<size_t>(1 << order); |
andrew@webrtc.org | 325cff0 | 2014-10-01 17:42:18 | [diff] [blame] | 40 | } |
| 41 | |
Peter Kasting | dce40cf | 2015-08-24 21:52:23 | [diff] [blame] | 42 | size_t RealFourier::ComplexLength(int order) { |
Peter Kasting | f045e4d | 2015-06-11 04:15:38 | [diff] [blame] | 43 | return FftLength(order) / 2 + 1; |
andrew@webrtc.org | 325cff0 | 2014-10-01 17:42:18 | [diff] [blame] | 44 | } |
| 45 | |
| 46 | RealFourier::fft_real_scoper RealFourier::AllocRealBuffer(int count) { |
| 47 | return fft_real_scoper(static_cast<float*>( |
| 48 | AlignedMalloc(sizeof(float) * count, kFftBufferAlignment))); |
| 49 | } |
| 50 | |
| 51 | RealFourier::fft_cplx_scoper RealFourier::AllocCplxBuffer(int count) { |
| 52 | return fft_cplx_scoper(static_cast<complex<float>*>( |
| 53 | AlignedMalloc(sizeof(complex<float>) * count, kFftBufferAlignment))); |
| 54 | } |
| 55 | |
andrew@webrtc.org | 325cff0 | 2014-10-01 17:42:18 | [diff] [blame] | 56 | } // namespace webrtc |
| 57 | |