spectral/filterbank.h File Reference

Filterbank object. More...

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Typedefs
typedef struct _aubio_filterbank_t	aubio_filterbank_t
	filterbank object
Functions
aubio_filterbank_t *	new_aubio_filterbank (uint_t n_filters, uint_t win_s)
	create filterbank object
void	del_aubio_filterbank (aubio_filterbank_t *f)
	destroy filterbank object
void	aubio_filterbank_do (aubio_filterbank_t *f, cvec_t *in, fvec_t *out)
	compute filterbank
fmat_t *	aubio_filterbank_get_coeffs (aubio_filterbank_t *f)
	return a pointer to the matrix object containing all filter coefficients
uint_t	aubio_filterbank_set_coeffs (aubio_filterbank_t *f, fmat_t *filters)
	copy filter coefficients to the filterbank

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Detailed Description

Filterbank object.

General-purpose spectral filterbank object.

Definition in file filterbank.h.

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Typedef Documentation

typedef struct _aubio_filterbank_t aubio_filterbank_t

filterbank object

This object stores a matrix of spectral filter coefficients.

Examples:

spectral/test-filterbank.c, and spectral/test-filterbank_mel.c.

Definition at line 45 of file filterbank.h.

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Function Documentation

void aubio_filterbank_do	(	aubio_filterbank_t *	f,
		cvec_t *	in,
		fvec_t *	out
	)

compute filterbank

Parameters:

	f	filterbank object, as returned by new_aubio_filterbank()
	in	input spectrum containing an input spectrum of length `win_s`
	out	output vector containing the energy found in each band, `nfilt` output values

Examples:

spectral/test-filterbank.c, and spectral/test-filterbank_mel.c.

fmat_t* aubio_filterbank_get_coeffs

(

aubio_filterbank_t *

f

)

return a pointer to the matrix object containing all filter coefficients

Parameters:

f

filterbank object, as returned by new_aubio_filterbank()

Examples:

spectral/test-filterbank.c, and spectral/test-filterbank_mel.c.

uint_t aubio_filterbank_set_coeffs	(	aubio_filterbank_t *	f,
		fmat_t *	filters
	)

copy filter coefficients to the filterbank

Parameters:

	f	filterbank object, as returned by new_aubio_filterbank()
	filters	filter bank coefficients to copy from

Examples:

spectral/test-filterbank.c.

void del_aubio_filterbank

(

aubio_filterbank_t *

f

)

destroy filterbank object

Parameters:

f

filterbank object, as returned by new_aubio_filterbank()

Examples:

spectral/test-filterbank.c, and spectral/test-filterbank_mel.c.

aubio_filterbank_t* new_aubio_filterbank	(	uint_t	n_filters,
		uint_t	win_s
	)

create filterbank object

Parameters:

	n_filters	number of filters to create
	win_s	size of analysis buffer (and length the FFT transform)

Examples:

spectral/test-filterbank.c, and spectral/test-filterbank_mel.c.