MVDATA may or may not be transmitted. If it is not, both
dmv_x and dmv_y is to be assumed zero.
This may not trigger wrong picture in all systems, but
it's a bug nevertheless. Fixes SA10116.vc1 on my 64-bit
Windows 7.
---
libavcodec/vc1dec.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c
index fa95273..325cc64 100644
--- a/libavcodec/vc1dec.c
+++ b/libavcodec/vc1dec.c
@@ -3954,6 +3954,7 @@ static int vc1_decode_p_mb_intfr(VC1Context *v)
vc1_mc_4mv_chroma4(v);
} else {
mvbp = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][2];
+ dmv_x = dmv_y = 0;
if (mvbp) {
get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
}
--
1.7.5.4
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