Check for missing reference in vp5/6 decoder.

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

Check for missing reference in vp5/6 decoder.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
6a0e7892 · Laurent Aimar · Michael Niedermayer · b64269ce · 6a0e7892
Commit 6a0e7892 authored Sep 21, 2011 by Laurent Aimar Committed by Michael Niedermayer Sep 21, 2011
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vp56.c libavcodec/vp56.c +2 -0

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--- a/libavcodec/vp56.c
+++ b/libavcodec/vp56.c
@@ -401,6 +401,8 @@ 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;