Fast Fourier Transform.
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Typedefs |
typedef struct _aubio_fft_t | aubio_fft_t |
| FFT object.
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Functions |
aubio_fft_t * | new_aubio_fft (uint_t size) |
| create new FFT computation object
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void | del_aubio_fft (aubio_fft_t *s) |
| delete FFT object
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void | aubio_fft_do (aubio_fft_t *s, fvec_t *input, cvec_t *spectrum) |
| compute forward FFT
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void | aubio_fft_rdo (aubio_fft_t *s, cvec_t *spectrum, fvec_t *output) |
| compute backward (inverse) FFT
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void | aubio_fft_do_complex (aubio_fft_t *s, fvec_t *input, fvec_t *compspec) |
| compute forward FFT
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void | aubio_fft_rdo_complex (aubio_fft_t *s, fvec_t *compspec, fvec_t *output) |
| compute backward (inverse) FFT from real/imag
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void | aubio_fft_get_spectrum (fvec_t *compspec, cvec_t *spectrum) |
| convert real/imag spectrum to norm/phas spectrum
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void | aubio_fft_get_realimag (cvec_t *spectrum, fvec_t *compspec) |
| convert real/imag spectrum to norm/phas spectrum
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void | aubio_fft_get_phas (fvec_t *compspec, cvec_t *spectrum) |
| compute phas spectrum from real/imag parts
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void | aubio_fft_get_imag (cvec_t *spectrum, fvec_t *compspec) |
| compute imaginary part from the norm/phas cvec
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void | aubio_fft_get_norm (fvec_t *compspec, cvec_t *spectrum) |
| compute norm component from real/imag parts
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void | aubio_fft_get_real (cvec_t *spectrum, fvec_t *compspec) |
| compute real part from norm/phas components
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Detailed Description
Fast Fourier Transform.
Depending on how aubio was compiled, FFT are computed using one of:
Definition in file fft.h.
Typedef Documentation
FFT object.
This object computes forward and backward FFTs.
Definition at line 46 of file fft.h.
Function Documentation
compute forward FFT
- Parameters:
-
s | fft object as returned by new_aubio_fft |
input | input signal |
spectrum | output spectrum |
- Examples:
- src/spectral/test-fft.c.
compute forward FFT
- Parameters:
-
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
- Parameters:
-
spectrum | norm/phas input array |
compspec | real/imag output fft array |
compute norm component from real/imag parts
- Parameters:
-
compspec | real/imag input fft array |
spectrum | cvec norm/phas output array |
compute phas spectrum from real/imag parts
- Parameters:
-
compspec | real/imag input fft array |
spectrum | cvec norm/phas output array |
compute real part from norm/phas components
- Parameters:
-
spectrum | norm/phas input array |
compspec | real/imag output fft array |
convert real/imag spectrum to norm/phas spectrum
- Parameters:
-
compspec | real/imag input fft array |
spectrum | cvec norm/phas output array |
convert real/imag spectrum to norm/phas spectrum
- Parameters:
-
compspec | real/imag input fft array |
spectrum | cvec norm/phas output array |
compute backward (inverse) FFT
- Parameters:
-
s | fft object as returned by new_aubio_fft |
spectrum | input spectrum |
output | output signal |
- Examples:
- src/spectral/test-fft.c.
compute backward (inverse) FFT from real/imag
- Parameters:
-
s | fft object as returned by new_aubio_fft |
compspec | real/imag input fft array |
output | real output array |