Masanori Kakura : winegstreamer: Avoid zero division in amt_from_gst_caps_video().

[Alexandre Julliard]

Module: wine
Branch: stable
Commit: 2bb94dee706c7f8a9b44e329784e4a1db816595d
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=2bb94dee706c7f8a9b44e32978...

Author: Masanori Kakura 
Date:   Wed Jan 25 23:02:20 2017 +0900

winegstreamer: Avoid zero division in amt_from_gst_caps_video().

Signed-off-by: Masanori Kakura 
Signed-off-by: Andrew Eikum 
Signed-off-by: Alexandre Julliard 
(cherry picked from commit 442653b94ef21fad97a6cd82fe01bc95a79a52a7)
Signed-off-by: Michael Stefaniuc

---

dlls/winegstreamer/gstdemux.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/dlls/winegstreamer/gstdemux.c b/dlls/winegstreamer/gstdemux.c
index c33ed9e..759a5db 100644
--- a/dlls/winegstreamer/gstdemux.c
+++ b/dlls/winegstreamer/gstdemux.c
@@ -233,9 +233,8 @@ static gboolean amt_from_gst_caps_video(GstCaps *caps, AM_MEDIA_TYPE *amt)
         bih->biCompression = amt->subtype.Data1;
     }
     bih->biSizeImage = width * height * bih->biBitCount / 8;
-    vih->AvgTimePerFrame = 10000000;
-    vih->AvgTimePerFrame *= denom;
-    vih->AvgTimePerFrame /= nom;
+    if ((vih->AvgTimePerFrame = (REFERENCE_TIME)MulDiv(10000000, denom, nom)) == -1)
+        vih->AvgTimePerFrame = 0; /* zero division or integer overflow */
     vih->rcSource.left = 0;
     vih->rcSource.right = width;
     vih->rcSource.top = height;