aubio
0.4.9
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Fast Fourier Transform. More...
Go to the source code of this file.
Typedefs | |
typedef struct _aubio_fft_t | aubio_fft_t |
FFT object. More... | |
Functions | |
aubio_fft_t * | new_aubio_fft (uint_t size) |
create new FFT computation object More... | |
void | del_aubio_fft (aubio_fft_t *s) |
delete FFT object More... | |
void | aubio_fft_do (aubio_fft_t *s, const fvec_t *input, cvec_t *spectrum) |
compute forward FFT More... | |
void | aubio_fft_rdo (aubio_fft_t *s, const cvec_t *spectrum, fvec_t *output) |
compute backward (inverse) FFT More... | |
void | aubio_fft_do_complex (aubio_fft_t *s, const fvec_t *input, fvec_t *compspec) |
compute forward FFT More... | |
void | aubio_fft_rdo_complex (aubio_fft_t *s, const fvec_t *compspec, fvec_t *output) |
compute backward (inverse) FFT from real/imag More... | |
void | aubio_fft_get_spectrum (const fvec_t *compspec, cvec_t *spectrum) |
convert real/imag spectrum to norm/phas spectrum More... | |
void | aubio_fft_get_realimag (const cvec_t *spectrum, fvec_t *compspec) |
convert real/imag spectrum to norm/phas spectrum More... | |
void | aubio_fft_get_phas (const fvec_t *compspec, cvec_t *spectrum) |
compute phas spectrum from real/imag parts More... | |
void | aubio_fft_get_imag (const cvec_t *spectrum, fvec_t *compspec) |
compute imaginary part from the norm/phas cvec More... | |
void | aubio_fft_get_norm (const fvec_t *compspec, cvec_t *spectrum) |
compute norm component from real/imag parts More... | |
void | aubio_fft_get_real (const cvec_t *spectrum, fvec_t *compspec) |
compute real part from norm/phas components More... | |
Fast Fourier Transform.
Depending on how aubio was compiled, FFT are computed using one of:
Definition in file fft.h.
typedef struct _aubio_fft_t aubio_fft_t |
void aubio_fft_do | ( | aubio_fft_t * | s, |
const fvec_t * | input, | ||
cvec_t * | spectrum | ||
) |
compute forward FFT
s | fft object as returned by new_aubio_fft |
input | input signal |
spectrum | output spectrum |
void aubio_fft_do_complex | ( | aubio_fft_t * | s, |
const fvec_t * | input, | ||
fvec_t * | compspec | ||
) |
compute forward FFT
s | fft object as returned by new_aubio_fft |
input | real input signal |
compspec | complex output fft real/imag |
compute imaginary part from the norm/phas cvec
spectrum | norm/phas input array |
compspec | real/imag output fft array |
compute norm component from real/imag parts
compspec | real/imag input fft array |
spectrum | cvec norm/phas output array |
compute phas spectrum from real/imag parts
compspec | real/imag input fft array |
spectrum | cvec norm/phas output array |
compute real part from norm/phas components
spectrum | norm/phas input array |
compspec | real/imag output fft array |
convert real/imag spectrum to norm/phas spectrum
compspec | real/imag input fft array |
spectrum | cvec norm/phas output array |
convert real/imag spectrum to norm/phas spectrum
compspec | real/imag input fft array |
spectrum | cvec norm/phas output array |
void aubio_fft_rdo | ( | aubio_fft_t * | s, |
const cvec_t * | spectrum, | ||
fvec_t * | output | ||
) |
compute backward (inverse) FFT
s | fft object as returned by new_aubio_fft |
spectrum | input spectrum |
output | output signal |
void aubio_fft_rdo_complex | ( | aubio_fft_t * | s, |
const fvec_t * | compspec, | ||
fvec_t * | output | ||
) |
compute backward (inverse) FFT from real/imag
s | fft object as returned by new_aubio_fft |
compspec | real/imag input fft array |
output | real output array |
void del_aubio_fft | ( | aubio_fft_t * | s | ) |
delete FFT object
s | fft object as returned by new_aubio_fft |
aubio_fft_t* new_aubio_fft | ( | uint_t | size | ) |