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Diffstat (limited to 'extern/audaspace/include/util/FFTPlan.h')
-rw-r--r-- | extern/audaspace/include/util/FFTPlan.h | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/extern/audaspace/include/util/FFTPlan.h b/extern/audaspace/include/util/FFTPlan.h deleted file mode 100644 index 7d533ca8773..00000000000 --- a/extern/audaspace/include/util/FFTPlan.h +++ /dev/null @@ -1,120 +0,0 @@ -/******************************************************************************* -* Copyright 2015-2016 Juan Francisco Crespo Galán -* -* Licensed under the Apache License, Version 2.0 (the "License"); -* you may not use this file except in compliance with the License. -* You may obtain a copy of the License at -* -* http://www.apache.org/licenses/LICENSE-2.0 -* -* Unless required by applicable law or agreed to in writing, software -* distributed under the License is distributed on an "AS IS" BASIS, -* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -* See the License for the specific language governing permissions and -* limitations under the License. -******************************************************************************/ - -#pragma once - -/** -* @file FFTPlan.h -* @ingroup util -* The FFTPlan class. -*/ - -#include <complex> -#include <fftw3.h> -#include "Audaspace.h" - -#include <memory> -#include <vector> - -/**Default FFT size.*/ -#define DEFAULT_N 4096 - -AUD_NAMESPACE_BEGIN - -/** -* Thas class represents an plan object that allows to calculate FFTs and IFFTs. -*/ -class AUD_API FFTPlan -{ -private: - /** - * The size of the FFT plan. - */ - int m_N; - - /** - * The plan to transform the input to the frequency domain. - */ - fftwf_plan m_fftPlanR2C; - - /** - * The plan to transform the input to the time domain again. - */ - fftwf_plan m_fftPlanC2R; - - /** - * The size of a buffer for its use with the FFT plan (in bytes). - */ - unsigned int m_bufferSize; - - // delete copy constructor and operator= - FFTPlan(const FFTPlan&) = delete; - FFTPlan& operator=(const FFTPlan&) = delete; - -public: - /** - * Creates a new FFTPlan object with DEFAULT_N size (4096). - * \param measureTime The aproximate amount of seconds that FFTW will spend searching for the optimal plan, - * which means faster FFTs and IFFTs while using this plan. If measureTime is negative, it will take all the time it needs. - */ - FFTPlan(double measureTime = 0); - - /** - * Creates a new FFTPlan object with a custom size. - * \param n The size of the FFT plan. Values that are a power of two are faster. - * The useful range usually is between 2048 and 8192, but bigger values can be useful - * in certain situations (when using the StreamBuffer class per example). - * Generally, low values use more CPU power and are a bit faster than large ones, - * there is also a huge decrease in efficiency when n is lower than 2048. - * \param measureTime The aproximate amount of seconds that FFTW will spend searching for the optimal plan, - * which means faster FFTs while using this plan. If measureTime is negative, it will take all the time it needs. - */ - FFTPlan(int n, double measureTime = 0); - ~FFTPlan(); - - /** - * Retrieves the size of the FFT plan. - * \return The size of the plan. - */ - int getSize(); - - /** - * Calculates the FFT of an input buffer with the current plan. - * \param[in,out] buffer A buffer with the input data an in which the output data will be written. - */ - void FFT(void* buffer); - - /** - * Calculates the IFFT of an input buffer with the current plan. - * \param[in,out] buffer A buffer with the input data an in which the output data will be written. - */ - void IFFT(void* buffer); - - /** - * Reserves memory for a buffer that can be used for inplace transformations with this plan. - * \return A pointer to a buffer of size ((N/2)+1)*2*sizeof(fftwf_complex). - * \warning The returned buffer must be freed with the freeBuffer method of this class. - */ - void* getBuffer(); - - /** - * Frees one of the buffers reserved with the getRealOnlyBuffer(), getComplexOnlyBuffer() or getInplaceBuffer() method. - * \param buffer A pointer to the buufer taht must be freed. - */ - void freeBuffer(void* buffer); -}; - -AUD_NAMESPACE_END |