首先,我们需要了解STL和fftw_complex的含义。STL是C++标准库中的一个模板库,它提供了许多常用的数据结构和算法,例如向量、列表、映射、排序等。而fftw_complex是FFTW库中的一个复数类型,用于表示复数。 要将STL中的复数向量转换为FFTW中的复数向量,我们可以使用以下步骤: ...
std::complex：对于类型为std::complex<T>的任何对象z，reinterpret_cast<T(&)[2]>(z)[0]是z的真实的部，reinterpret_cast<T(&)[2]>(z)[1]是z的虚部。此要求的目的是保持C++库复数类型和C语言复数类型（及其数组）之间的二进制兼容性，这两种类型具有相同的对象表示要求。现在，fftw_complex不一定是C...
int fftw_fft_complex( int iSize, d_complex * vSig, FFT_SIGN iSign = FFT_FORWARD ) ParametersiSize [input] the number of data values. vSig [modify] the complex data sequences for input and the result data after transformation for output iSign [input] the transformation to carry out =...
fftw_complex is defined as typedef double fftw_complex[2] so It is not a pointer to a pointer as you mentioned. Yes I have an explicit interface and
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Hello, at the beginning I shall say that I'm pretty fresh in Intel compiler and in MKL business. I have to quite general questions. 1: I'm about to
从http://fftw.org/fftw3_doc/simd-alignment-and-fftw_005fmalloc.html#simd-alignment-and-fftw_005fmalloc.您应该使用FFTW的分配例程,因为它们提供了特定的对齐。如果您不使用其例程(或不保证对齐),则必须使用相同的缓冲区来创建和执行。使用其例程允许更好的矢量化,因此更快的代码。
vSig [modify] the complex data sequences for input and the result data after fourier transformation for output iSign [input] the transformation to carry out = FFT_FORWARD: FFT (by default) = FFT_BACKWARD: IFFT. Return Returns 0 for success or error codes for failure. ...
This is just about notifying FFTW that complex is not defined, right? Note to self: global preprocessor defines are evil. Contributor paugier commented Oct 24, 2024 I think it makes sense. @e-kwsm can you please rebase on master so that the CI is rerun with the versions officially ...
FFTW is a C subroutine library for computing the discrete Fourier transform (DFT) in one or more dimensions, of arbitrary input size, and of both real and complex data (as well as of even/odd data, i.e. the discrete cosine/sine transforms or DCT/DST). -