[FFmpeg-cvslog] avfilter/vf_transpose: Fix rounding error

[Michael Niedermayer]

ffmpeg | branch: release/2.7 | Michael Niedermayer <michaelni at gmx.at> | Tue Jun 30 16:01:15 2015 +0200| [51782e86903c49a172c8b5c7e494b72e6c8a8aa4] | committer: Michael Niedermayer

avfilter/vf_transpose: Fix rounding error

Fixes out of array access
Fixes: asan_heap-oob_7f875d_3482_cov_1818465256_ssudec.mov

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit 0083c16605aa5997534e87e68f97ef85a8c3b7b8)

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=51782e86903c49a172c8b5c7e494b72e6c8a8aa4
---

 libavfilter/vf_transpose.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/vf_transpose.c b/libavfilter/vf_transpose.c
index 911329c..e4de31b 100644
--- a/libavfilter/vf_transpose.c
+++ b/libavfilter/vf_transpose.c
@@ -151,7 +151,7 @@ static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr,
         int hsub    = plane == 1 || plane == 2 ? trans->hsub : 0;
         int vsub    = plane == 1 || plane == 2 ? trans->vsub : 0;
         int pixstep = trans->pixsteps[plane];
-        int inh     = in->height  >> vsub;
+        int inh     = FF_CEIL_RSHIFT(in->height, vsub);
         int outw    = FF_CEIL_RSHIFT(out->width,  hsub);
         int outh    = FF_CEIL_RSHIFT(out->height, vsub);
         int start   = (outh *  jobnr   ) / nb_jobs;