[FFmpeg-cvslog] avcodec/snowdec: Fix avmv_index increment
Michael Niedermayer
git at videolan.org
Fri Feb 20 03:32:04 CET 2015
ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Fri Feb 20 03:19:02 2015 +0100| [6c91afe4973f25f050c8b704b62a8367fc5e7a8c] | committer: Michael Niedermayer
avcodec/snowdec: Fix avmv_index increment
Fixes reading uninitialized memory
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=6c91afe4973f25f050c8b704b62a8367fc5e7a8c
---
libavcodec/snowdec.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/libavcodec/snowdec.c b/libavcodec/snowdec.c
index 58f9ed8..e37190d 100644
--- a/libavcodec/snowdec.c
+++ b/libavcodec/snowdec.c
@@ -90,7 +90,7 @@ static av_always_inline void predict_slice_buffered(SnowContext *s, slice_buffer
if(s->avmv && mb_y < mb_h && plane_index == 0)
for(mb_x=0; mb_x<mb_w; mb_x++){
- AVMotionVector *avmv = s->avmv + (s->avmv_index++);
+ AVMotionVector *avmv = s->avmv + s->avmv_index;
const int b_width = s->b_width << s->block_max_depth;
const int b_stride= b_width;
BlockNode *bn= &s->block[mb_x + mb_y*b_stride];
@@ -98,6 +98,8 @@ static av_always_inline void predict_slice_buffered(SnowContext *s, slice_buffer
if (bn->type)
continue;
+ s->avmv_index++;
+
avmv->w = block_w;
avmv->h = block_h;
avmv->dst_x = block_w*mb_x - block_w/2;
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