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/* This code is based upon work that bore the legend:
*
* Copyright (C) 1997 David Mosberger
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ardour_spline_h__
#define __ardour_spline_h__
#ifdef __cplusplus
extern "C" {
#endif
typedef struct _spline Spline;
typedef struct _spline_point SplinePoint;
struct _spline_point
{
float x;
float y;
};
Spline *spline_new (void);
void spline_free (Spline *);
void spline_set (Spline *, uint32_t n, SplinePoint *);
void spline_add (Spline *, uint32_t n, SplinePoint *);
void spline_solve (Spline *);
float spline_eval (Spline *, float val);
void spline_fill (Spline *, float x0, float x1, float *vec, uint32_t veclen);
float spline_get_max_x (Spline *);
float spline_get_min_x (Spline *);
struct _spline
{
float *deriv2;
float *x;
float *y;
float max_x;
float min_x;
SplinePoint *points;
uint32_t npoints;
uint32_t space;
#ifdef __cplusplus
void set (uint32_t n, SplinePoint *points) {
spline_set (this, n, points);
}
void add (uint32_t n, SplinePoint *points) {
spline_add (this, n, points);
}
void solve () {
spline_solve (this);
}
float eval (float val) {
return spline_eval (this, val);
}
void fill (float x0, float x1, float *vec, uint32_t veclen) {
spline_fill (this, x0, x1, vec, veclen);
}
#endif /* __cplusplus */
};
#ifdef __cplusplus
}
#endif
#endif /* __ardour_spline_h__ */
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