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mpeg12: fix frame_pred_frame_dct handling in field pictures 

Fixes Ticket254

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-12-31 20:52:52 +01:00
parent 49ec0d8ed2
commit 6e8df250fd
1 changed files with 3 additions and 2 deletions
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5
libavcodec/mpeg12.c
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@ -878,7 +878,8 @@ static int mpeg_decode_mb(MpegEncContext *s, DCTELEM block[12][64])
s->mv_dir = MV_DIR_FORWARD;
if (s->picture_structure == PICT_FRAME) {
if (!s->frame_pred_frame_dct)
if (s->picture_structure == PICT_FRAME
&& !s->frame_pred_frame_dct)
s->interlaced_dct = get_bits1(&s->gb);
s->mv_type = MV_TYPE_16X16;
} else {
@ -900,7 +901,7 @@ static int mpeg_decode_mb(MpegEncContext *s, DCTELEM block[12][64])
av_assert2(mb_type & MB_TYPE_L0L1);
// FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
/* get additional motion vector type */
if (s->frame_pred_frame_dct)
if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct)
motion_type = MT_FRAME;
else {
motion_type = get_bits(&s->gb, 2);