| aubio
    0.4.9
    | 
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 | ) | 
| aubio_fft_t* new_aubio_fft | ( | uint_t | size | ) |