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mpeg12: print error for invalid skip cases

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-12-31 20:32:37 +01:00
parent 9e28e0035a
commit 343900a147
1 changed files with 3 additions and 1 deletions
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4
libavcodec/mpeg12.c
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@ -770,8 +770,10 @@ static int mpeg_decode_mb(MpegEncContext *s, DCTELEM block[12][64])
mb_type = s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
else
mb_type = s->current_picture.f.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1]; // FIXME not sure if this is allowed in MPEG at all
if (IS_INTRA(mb_type))
if (IS_INTRA(mb_type)) {
av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
return -1;
}
s->current_picture.f.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
mb_type | MB_TYPE_SKIP;
// av_assert2(s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1] & (MB_TYPE_16x16 | MB_TYPE_16x8));