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vc1_parser: fix NULL pointer dereference

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Fixes Ticket456

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-12-01 18:35:58 +01:00
parent d9cc6bb432
commit b50be4e38d
1 changed files with 2 additions and 0 deletions
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2
libavcodec/vc1.c
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@ -896,6 +896,8 @@ int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
v->rnd = get_bits1(gb); v->rnd = get_bits1(gb);
if (v->interlace) if (v->interlace)
v->uvsamp = get_bits1(gb); v->uvsamp = get_bits1(gb);
if(!ff_vc1_bfraction_vlc.table)
return 0; //parsing only, vlc tables havnt been allocated
if (v->field_mode) { if (v->field_mode) {
if (!v->refdist_flag) if (!v->refdist_flag)
v->refdist = 0; v->refdist = 0;