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/*
Copyright (C) 2003-2015 Paul Brossier <piem@aubio.org>
This file is part of aubio.
aubio is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
aubio is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with aubio. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef AUBIO_FVEC_H
#define AUBIO_FVEC_H
#ifdef __cplusplus
extern "C" {
#endif
/** \file
Vector of real-valued data
This file specifies the ::fvec_t buffer type, which is used throughout aubio
to store vector of real-valued ::smpl_t.
\example test-fvec.c
*/
/** Buffer for real data
Vector of real-valued data
::fvec_t is is the structure used to store vector of real-valued data, ::smpl_t .
\code
uint_t buffer_size = 1024;
// create a vector of 512 values
fvec_t * input = new_fvec (buffer_size);
// set some values of the vector
input->data[23] = 2.;
// ..
// compute the mean of the vector
mean = fvec_mean(a_vector);
// destroy the vector
del_fvec(a_vector);
\endcode
See `examples/` and `tests/src` directories for more examples.
*/
typedef struct {
uint_t length; /**< length of buffer */
smpl_t *data; /**< data vector of length ::fvec_t.length */
} fvec_t;
/** fvec_t buffer creation function
\param length the length of the buffer to create
*/
fvec_t * new_fvec(uint_t length);
/** fvec_t buffer deletion function
\param s buffer to delete as returned by new_fvec()
*/
void del_fvec(fvec_t *s);
/** read sample value in a buffer
\param s vector to read from
\param position sample position to read from
*/
smpl_t fvec_get_sample(const fvec_t *s, uint_t position);
/** write sample value in a buffer
\param s vector to write to
\param data value to write in s->data[position]
\param position sample position to write to
*/
void fvec_set_sample(fvec_t *s, smpl_t data, uint_t position);
/** read data from a buffer
\param s vector to read from
*/
smpl_t * fvec_get_data(const fvec_t *s);
/** print out fvec data
\param s vector to print out
*/
void fvec_print(const fvec_t *s);
/** set all elements to a given value
\param s vector to modify
\param val value to set elements to
*/
void fvec_set_all (fvec_t *s, smpl_t val);
/** set all elements to zero
\param s vector to modify
*/
void fvec_zeros(fvec_t *s);
/** set all elements to ones
\param s vector to modify
*/
void fvec_ones(fvec_t *s);
/** revert order of vector elements
\param s vector to revert
*/
void fvec_rev(fvec_t *s);
/** 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.
\param s vector to weight
\param weight weighting coefficients
*/
void fvec_weight(fvec_t *s, const fvec_t *weight);
/** make a copy of a vector
\param s source vector
\param t vector to copy to
*/
void fvec_copy(const fvec_t *s, fvec_t *t);
/** make a copy of a vector, applying weights to each element
\param in input vector
\param weight weights vector
\param out output vector
*/
void fvec_weighted_copy(const fvec_t *in, const fvec_t *weight, fvec_t *out);
#ifdef __cplusplus
}
#endif
#endif /* AUBIO_FVEC_H */
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