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// SPDX-License-Identifier: GPL-2.0
#ifndef INTERPOLATE_H
#define INTERPOLATE_H
/* Linear interpolation between 'a' and 'b', when we are 'part'way into the 'whole' distance from a to b */
static inline int interpolate(int a, int b, int part, int whole)
{
/* It is doubtful that we actually need floating point for this, but whatever */
if (whole) {
double x = (double)a * (whole - part) + (double)b * part;
return (int)lrint(x / whole);
}
return (a+b)/2;
}
#endif
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