ref: 79e72cf12dc97430b5c9555a426c128ee4e5aa3c
dir: /src/utils/scale.h/
/*
Copyright (C) 2003 Paul Brossier
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/** \file
Vector scaling function
This object, inspired from the scale object in FTS, the jMax engine, scales
the values of a vector according to an affine function defined as follow:
\f$ y = (x - ilow)*(ohig-olow)/(ihig-ilow) + olow \f$
*/
#ifndef SCALE_H
#define SCALE_H
#ifdef __cplusplus
extern "C" {
#endif
/** scale object */
typedef struct _aubio_scale_t aubio_scale_t;
/** create a scale object
\param flow lower value of output function
\param fhig higher value of output function
\param ilow lower value of input function
\param ihig higher value of output function
*/
aubio_scale_t * new_aubio_scale(smpl_t flow, smpl_t fhig,
smpl_t ilow, smpl_t ihig);
/** delete a scale object
\param s scale object as returned by new_aubio_scale
*/
void del_aubio_scale(aubio_scale_t *s);
/** scale input vector
\param s scale object as returned by new_aubio_scale
\param input vector to scale
*/
void aubio_scale_do(aubio_scale_t *s, fvec_t * input);
/** modify scale parameters after object creation
\param s scale object as returned by new_aubio_scale
\param olow lower value of output function
\param ohig higher value of output function
\param ilow lower value of input function
\param ihig higher value of output function
*/
void aubio_scale_set (aubio_scale_t *s, smpl_t ilow, smpl_t ihig,
smpl_t olow, smpl_t ohig);
#ifdef __cplusplus
}
#endif
#endif