From d07b0d992736e01006caa64b87d996f902d357db Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Thu, 24 Jan 2013 17:32:37 +0000
Subject: swscale: check flags instead of nb_components to find if pixel format
 have alpha

Signed-off-by: Paul B Mahol <onemda@gmail.com>
---
 libswscale/swscale_internal.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'libswscale/swscale_internal.h')

diff --git a/libswscale/swscale_internal.h b/libswscale/swscale_internal.h
index d1f9539246..4f4b9531ee 100644
--- a/libswscale/swscale_internal.h
+++ b/libswscale/swscale_internal.h
@@ -688,7 +688,7 @@ static av_always_inline int isALPHA(enum AVPixelFormat pix_fmt)
 {
     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
     av_assert0(desc);
-    return desc->nb_components == 2 || desc->nb_components == 4;
+    return desc->flags & PIX_FMT_ALPHA;
 }
 
 #if 1
-- 
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