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| author | Michael Niedermayer <michaelni@gmx.at> | 2013-04-18 00:52:48 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2013-04-18 01:55:42 +0200 |
| commit | bdfe60c769f4d4e71a360fe02f06cdb9c039cf35 (patch) | |
| tree | eee24c44b2cf439f947fecf4dbc743d379914bdd /libavcodec/xan.c | |
| parent | 32cc7ba8a70a630a3e531195a6612888bc982ddb (diff) | |
| download | ffmpeg-bdfe60c769f4d4e71a360fe02f06cdb9c039cf35.tar.gz | |
xan: Check for overlapping copies
No valid samples i found use such copies
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/xan.c')
| -rw-r--r-- | libavcodec/xan.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libavcodec/xan.c b/libavcodec/xan.c index 27583522f9..41925aa346 100644 --- a/libavcodec/xan.c +++ b/libavcodec/xan.c @@ -249,6 +249,12 @@ static inline void xan_wc3_copy_pixel_run(XanContext *s, AVFrame *frame, curframe_x = x; prevframe_index = (y + motion_y) * stride + x + motion_x; prevframe_x = x + motion_x; + + if (prev_palette_plane == palette_plane && FFABS(curframe_index - prevframe_index) < pixel_count) { + avpriv_request_sample(s->avctx, "Overlapping copy\n"); + return ; + } + while (pixel_count && curframe_index < s->frame_size && prevframe_index < s->frame_size) { |