fmat.h File Reference

Matrix of real valued data. More...

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Data Structures
struct	fmat_t
	Buffer for real data. More...

Functions
fmat_t *	new_fmat (uint_t height, uint_t length)
	fmat_t buffer creation function
void	del_fmat (fmat_t *s)
	fmat_t buffer deletion function
smpl_t	fmat_get_sample (const fmat_t *s, uint_t channel, uint_t position)
	read sample value in a buffer
void	fmat_set_sample (fmat_t *s, smpl_t data, uint_t channel, uint_t position)
	write sample value in a buffer
void	fmat_get_channel (const fmat_t *s, uint_t channel, fvec_t *output)
	read channel vector from a buffer
smpl_t *	fmat_get_channel_data (const fmat_t *s, uint_t channel)
	get vector buffer from an fmat data
smpl_t **	fmat_get_data (const fmat_t *s)
	read data from a buffer
void	fmat_print (const fmat_t *s)
	print out fmat data
void	fmat_set (fmat_t *s, smpl_t val)
	set all elements to a given value
void	fmat_zeros (fmat_t *s)
	set all elements to zero
void	fmat_ones (fmat_t *s)
	set all elements to ones
void	fmat_rev (fmat_t *s)
	revert order of vector elements
void	fmat_weight (fmat_t *s, const fmat_t *weight)
	apply weight to vector
void	fmat_copy (const fmat_t *s, fmat_t *t)
	make a copy of a matrix
void	fmat_vecmul (const fmat_t *s, const fvec_t *scale, fvec_t *output)
	compute the product of a matrix by a vector

Detailed Description

Matrix of real valued data.

This file specifies the fmat_t type, which is used in aubio to store arrays of floating point values.

Definition in file fmat.h.

Function Documentation

del_fmat()

void del_fmat

(

fmat_t *

s

)

fmat_t buffer deletion function

Parameters

s	buffer to delete as returned by new_fmat()

Examples

io/test-sink.c, io/test-source.c, and test-fmat.c.

fmat_copy()

void fmat_copy	(	const fmat_t *	s,
		fmat_t *	t )

make a copy of a matrix

Parameters

s	source vector
t	vector to copy to

Examples

test-fmat.c.

fmat_get_channel()

void fmat_get_channel	(	const fmat_t *	s,
		uint_t	channel,
		fvec_t *	output )

read channel vector from a buffer

Parameters

s	vector to read from
channel	channel to read from
output	fvec_t to output to

Examples

test-fmat.c.

fmat_get_channel_data()

smpl_t * fmat_get_channel_data	(	const fmat_t *	s,
		uint_t	channel )

get vector buffer from an fmat data

Parameters

s	vector to read from
channel	channel to read from

Examples

test-fmat.c.

fmat_get_data()

smpl_t ** fmat_get_data

(

const fmat_t *

s

)

read data from a buffer

Parameters

s	vector to read from

Examples

test-fmat.c.

fmat_get_sample()

smpl_t fmat_get_sample	(	const fmat_t *	s,
		uint_t	channel,
		uint_t	position )

read sample value in a buffer

Parameters

s	vector to read from
channel	channel to read from
position	sample position to read from

Examples

test-fmat.c.

fmat_ones()

void fmat_ones

(

fmat_t *

s

)

set all elements to ones

Parameters

s	vector to modify

Examples

test-fmat.c.

fmat_print()

void fmat_print

(

const fmat_t *

s

)

print out fmat data

Parameters

s	vector to print out

Examples

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

fmat_rev()

void fmat_rev

(

fmat_t *

s

)

revert order of vector elements

Parameters

s	vector to revert

Examples

test-fmat.c.

fmat_set()

void fmat_set	(	fmat_t *	s,
		smpl_t	val )

set all elements to a given value

Parameters

s	vector to modify
val	value to set elements to

Examples

test-fmat.c.

fmat_set_sample()

void fmat_set_sample	(	fmat_t *	s,
		smpl_t	data,
		uint_t	channel,
		uint_t	position )

write sample value in a buffer

Parameters

s	vector to write to
data	value to write in s->data[channel][position]
channel	channel to write to
position	sample position to write to

Examples

test-fmat.c.

fmat_vecmul()

void fmat_vecmul	(	const fmat_t *	s,
		const fvec_t *	scale,
		fvec_t *	output )

compute the product of a matrix by a vector

Parameters

s	matrix to compute product with
scale	vector to compute product with
output	vector to store restults in

fmat_weight()

void fmat_weight	(	fmat_t *	s,
		const fmat_t *	weight )

apply weight to vector

If the weight vector is longer than s, only the first elements are used. If the weight vector is shorter than s, the last elements of s are not weighted.

Parameters

s	vector to weight
weight	weighting coefficients

Examples

test-fmat.c.

fmat_zeros()

void fmat_zeros

(

fmat_t *

s

)

set all elements to zero

Parameters

s	vector to modify

new_fmat()

fmat_t * new_fmat	(	uint_t	height,
		uint_t	length )

fmat_t buffer creation function

Parameters

length	the length of the matrix to create
height	the height of the matrix to create

Examples

io/test-sink.c, io/test-source.c, and test-fmat.c.