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Code Issues Releases Activity

itu H.263: Fix handling of PB blocks

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This fixes artifacts in Ticket744

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-12-10 23:20:47 +01:00
parent c3bb3334f6
commit 623184afa2
1 changed files with 3 additions and 0 deletions
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3
libavcodec/ituh263dec.c
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@ -566,11 +566,13 @@ static int h263_skip_b_part(MpegEncContext *s, int cbp)
{
LOCAL_ALIGNED_16(DCTELEM, dblock, [64]);
int i, mbi;
int bli[6];
/* we have to set s->mb_intra to zero to decode B-part of PB-frame correctly
* but real value should be restored in order to be used later (in OBMC condition)
*/
mbi = s->mb_intra;
memcpy(bli, s->block_last_index, sizeof(bli));
s->mb_intra = 0;
for (i = 0; i < 6; i++) {
if (h263_decode_block(s, dblock, i, cbp&32) < 0)
@ -578,6 +580,7 @@ static int h263_skip_b_part(MpegEncContext *s, int cbp)
cbp+=cbp;
}
s->mb_intra = mbi;
memcpy(s->block_last_index, bli, sizeof(bli));
return 0;
}