readme.txt

FFT代原碼為C++需要測過才能用

General Purpose FFT (Fast Fourier Transform) Package

files
    fft2f.c    : FFT Package in C       - Easy Version
    fft2f.f    : FFT Package in Fortran - Easy Version
    fft2ft.c   : Test Program of "fft2f.c"
    fft2ft.f   : Test Program of "fft2f.f"
    fft4f.c    : FFT Package in C       - Fast Version
    fft4f.f    : FFT Package in Fortran - Fast Version
    fft4ft.c   : Test Program of "fft4f.c"
    fft4ft.f   : Test Program of "fft4f.f"
    fftxf.doc  : Document of "fft*f.*"
    fftxfj.doc : Document of "fft*f.*" (Japanese)

routines in the package
    cdft: Complex Discrete Fourier Transform
    rdft: Real Discrete Fourier Transform
    ddct: Discrete Cosine Transform
    ddst: Discrete Sine Transform
    dfct: Cosine Transform of RDFT (Real Symmetric DFT)
    dfst: Sine Transform of RDFT (Real Anti-symmetric DFT)

copyright
    Copyright(C) 1996, 1997 Takuya OOURA
    (email: [e-mail]).
    You may use, copy, modify this code for any purpose and 
    without fee. You may distribute this ORIGINAL package.