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Check for missing reference in vp5/6 decoder.

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 6a0e78929aa7d6b2c6b598c1589fb0e48fccb132)
This commit is contained in:
Laurent Aimar 2011-09-21 20:46:30 +02:00 committed by Michael Niedermayer
parent 69b6248327
commit a5a02ea3f2
1 changed files with 2 additions and 0 deletions
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libavcodec/vp56.c
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@ -399,6 +399,8 @@ static void vp56_decode_mb(VP56Context *s, int row, int col, int is_alpha)
frame_current = s->framep[VP56_FRAME_CURRENT];
frame_ref = s->framep[ref_frame];
if (mb_type != VP56_MB_INTRA && !frame_ref->data[0])
return;
ab = 6*is_alpha;
b_max = 6 - 2*is_alpha;