From 61b268eeda45d31ae771f6a13f0374210574e309 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20B=C5=93sch?= <ubitux@gmail.com>
Date: Thu, 16 May 2013 19:02:19 +0200
Subject: [PATCH] lavfi/idet: fix chroma subsampling with odd sizes.

---
 libavfilter/vf_idet.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavfilter/vf_idet.c b/libavfilter/vf_idet.c
index cd8bbe3567..70aae92228 100644
--- a/libavfilter/vf_idet.c
+++ b/libavfilter/vf_idet.c
@@ -118,8 +118,8 @@ static void filter(AVFilterContext *ctx)
         int refs = idet->cur->linesize[i];
 
         if (i && i<3) {
-            w >>= idet->csp->log2_chroma_w;
-            h >>= idet->csp->log2_chroma_h;
+            w = FF_CEIL_RSHIFT(w, idet->csp->log2_chroma_w);
+            h = FF_CEIL_RSHIFT(h, idet->csp->log2_chroma_h);
         }
 
         for (y = 2; y < h - 2; y++) {