From 9cd523bf5fab1c93ecf0418b5ae5d61b1e8fed9e Mon Sep 17 00:00:00 2001
From: Niklas Haas <git@nand.wakku.to>
Date: Sun, 15 Mar 2015 17:44:21 +0100
Subject: [PATCH] filter_kernels: add comment to prevent confusion

There are conflicting definitons of Ginseng.
---
 video/out/filter_kernels.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/video/out/filter_kernels.c b/video/out/filter_kernels.c
index 084c7b85ae..1b8c70ba1a 100644
--- a/video/out/filter_kernels.c
+++ b/video/out/filter_kernels.c
@@ -279,6 +279,8 @@ static double lanczos(kernel *k, double x)
 
 static double ewa_ginseng(kernel *k, double x)
 {
+    // Note: This is EWA ginseng, aka sinc-windowed jinc.
+    // Not to be confused with tensor ginseng, aka jinc-windowed sinc.
     double radius = k->radius;
     if (fabs(x) >= radius)
         return 0.0;