From 037fc3b054b10aee0f11fdbe835e5dffa8e95b37 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Sun, 15 Dec 2013 14:13:55 +0100
Subject: [PATCH] swscale/utils: check chroma width for fast bilinear scaler
Fixes artifacts where fast bilinear was used for downscaling chroma
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
libswscale/utils.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/libswscale/utils.c b/libswscale/utils.c
index baf2c591ca6..80c789fef88 100644
--- a/libswscale/utils.c
+++ b/libswscale/utils.c
@@ -1342,8 +1342,9 @@ av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
if (INLINE_MMXEXT(cpu_flags) && c->srcBpc == 8 && c->dstBpc <= 14) {
c->canMMXEXTBeUsed = dstW >= srcW && (dstW & 31) == 0 &&
+ c->chrDstW >= c->chrSrcW &&
(srcW & 15) == 0;
- if (!c->canMMXEXTBeUsed && dstW >= srcW && (srcW & 15) == 0
+ if (!c->canMMXEXTBeUsed && dstW >= srcW && c->chrDstW >= c->chrSrcW && (srcW & 15) == 0
&& (flags & SWS_FAST_BILINEAR)) {
if (flags & SWS_PRINT_INFO)
--
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