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vc1dec: Set chroma reference field from REFFIELD for 1REF field pictures 

Interlaced field pictures can have one or two reference pictures, signaled
by NUMREF syntax element. For single reference pictures, reference picture
is determined by REFFIELD syntax element.

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
This commit is contained in:
Mashiat Sarker Shakkhar 2012-10-09 19:38:15 +00:00 committed by Derek Buitenhuis
parent 26db9100b2
commit 88058d9a99
1 changed files with 1 additions and 0 deletions
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libavcodec/vc1dec.c
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@ -794,6 +794,7 @@ static void vc1_mc_4mv_chroma(VC1Context *v, int dir)
/* calculate chroma MV vector from four luma MVs */
if (!v->field_mode || (v->field_mode && !v->numref)) {
valid_count = get_chroma_mv(mvx, mvy, intra, 0, &tx, &ty);
chroma_ref_type = v->reffield;
if (!valid_count) {
s->current_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
s->current_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;