[FFmpeg-cvslog] vf_idet: reorder operations to avoid division by 0

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Fri Oct 19 19:35:31 2012 +0200| [31fdf3065daceb31e12fd26a367445676d761180] | committer: Michael Niedermayer

vf_idet: reorder operations to avoid division by 0

Fixes CID733738
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=31fdf3065daceb31e12fd26a367445676d761180
---

 libavfilter/vf_idet.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/libavfilter/vf_idet.c b/libavfilter/vf_idet.c
index 1e067ef..d64c48c 100644
--- a/libavfilter/vf_idet.c
+++ b/libavfilter/vf_idet.c
@@ -118,11 +118,11 @@ static void filter(AVFilterContext *ctx)
         }
     }
 
-    if      (alpha[0] / (float)alpha[1] > idet->interlace_threshold){
+    if      (alpha[0] > idet->interlace_threshold * alpha[1]){
         type = TFF;
-    }else if(alpha[1] / (float)alpha[0] > idet->interlace_threshold){
+    }else if(alpha[1] > idet->interlace_threshold * alpha[0]){
         type = BFF;
-    }else if(alpha[1] / (float)delta    > idet->progressive_threshold){
+    }else if(alpha[1] > idet->progressive_threshold * delta){
         type = PROGRSSIVE;
     }else{
         type = UNDETERMINED;