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snow: Fix off by 1 error in reference picture management

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Fixes out of array accesses
No release is affected by this bug

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-05-04 01:11:08 +02:00
parent e756635964
commit 64819bfc7a
1 changed files with 1 additions and 1 deletions
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libavcodec/snow.c
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@ -618,7 +618,7 @@ int ff_snow_frame_start(SnowContext *s){
av_frame_move_ref(&tmp, &s->last_picture[s->max_ref_frames-1]);
for(i=s->max_ref_frames-1; i>0; i--)
av_frame_move_ref(&s->last_picture[i+1], &s->last_picture[i]);
av_frame_move_ref(&s->last_picture[i], &s->last_picture[i-1]);
memmove(s->halfpel_plane+1, s->halfpel_plane, (s->max_ref_frames-1)*sizeof(void*)*4*4);
if(USE_HALFPEL_PLANE && s->current_picture.data[0])
halfpel_interpol(s, s->halfpel_plane[0], &s->current_picture);