Re: [RFC PATCH] fixp-arith: replace sin/cos table by a better precision one
From: Prashant Laddha (prladdha) <hidden>
Date: 2014-12-17 08:17:40
Also in:
linux-media
Thanks for the patch, Mauro. Just a correction below.
+/* cos(x) = sin(x + pi radians) */ +
This should pi / 2. Correcting for the same below.
+#define fixp_cos32_rad(rad, twopi) \ + fixp_sin32_rad(rad + twopi/2, twopi)
fixp_sin32_rad(rad + twopi/4, twopi)
+
I think this patch will serve the need. I will test it for vivid sir tone generation. I will rework my patches to use sin/cos functions from fixp-arith.h.