Messages in this thread
Patch in this message
 From Craig Tatlor <> Subject [PATCH v5 1/4] fixp-arith: add a linear interpolation function Date Thu, 7 Jun 2018 19:12:49 +0100
`Adds a function to interpolate against two points,this is carried arount as a helper function by tons of drivers.Signed-off-by: Craig Tatlor <ctatlor97@gmail.com>--- include/linux/fixp-arith.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)diff --git a/include/linux/fixp-arith.h b/include/linux/fixp-arith.hindex d4686fe1cac7..c21de4f358dd 100644--- a/include/linux/fixp-arith.h+++ b/include/linux/fixp-arith.h@@ -153,4 +153,24 @@ static inline s32 fixp_sin32_rad(u32 radians, u32 twopi) #define fixp_cos32_rad(rad, twopi)	\ 	fixp_sin32_rad(rad + twopi / 4, twopi) ++/**+ * fixp_linear_interpolate() - interpolates a value from two known points+ *+ * @x0: x value of point 0+ * @y0: y value of point 0+ * @x1: x value of point 1+ * @y1: y value of point 1+ * @x: the linear interpolant+ */+static inline int fixp_linear_interpolate(int x0, int y0, int x1, int y1, int x)+{+	if (y0 == y1 || x == x0)+		return y0;+	if (x1 == x0 || x == x1)+		return y1;++	return y0 + ((y1 - y0) * (x - x0) / (x1 - x0));+}+ #endif-- 2.17.0`

Last update: 2018-06-07 20:14    [W:0.246 / U:1.396 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site