[FFmpeg-cvslog] yadif: fix slice sizes

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Fri May 24 17:33:59 2013 +0200| [1d08e4b584cc8a12fa4b63bc13829f1e6d4f2e55] | committer: Michael Niedermayer

yadif: fix slice sizes

This more evenly distributes the load between threads

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=1d08e4b584cc8a12fa4b63bc13829f1e6d4f2e55
---

 libavfilter/vf_yadif.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/libavfilter/vf_yadif.c b/libavfilter/vf_yadif.c
index 124ef91..8cd6f0d 100644
--- a/libavfilter/vf_yadif.c
+++ b/libavfilter/vf_yadif.c
@@ -190,9 +190,8 @@ static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
     int refs = s->cur->linesize[td->plane];
     int df = (s->csp->comp[td->plane].depth_minus1 + 8) / 8;
     int pix_3 = 3 * df;
-    int slice_h = td->h / nb_jobs;
-    int slice_start = jobnr * slice_h;
-    int slice_end   = (jobnr == nb_jobs - 1) ? td->h : (jobnr + 1) * slice_h;
+    int slice_start = (td->h *  jobnr   ) / nb_jobs;
+    int slice_end   = (td->h * (jobnr+1)) / nb_jobs;
     int y;
 
     /* filtering reads 3 pixels to the left/right; to avoid invalid reads,