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fixed last zero mv for field - fixed mismatch handling for intra coefs 

Originally committed as revision 75 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Fabrice Bellard 2001-08-11 22:08:23 +00:00
parent 514547517b
commit d753173a55
1 changed files with 4 additions and 2 deletions
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6
libavcodec/mpeg12.c
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@ -633,6 +633,8 @@ static int mpeg_decode_mb(MpegEncContext *s,
s->mv_type = MV_TYPE_16X16;
s->last_mv[0][0][0] = 0;
s->last_mv[0][0][1] = 0;
s->last_mv[0][1][0] = 0;
s->last_mv[0][1][1] = 0;
s->mv[0][0][0] = 0;
s->mv[0][0][1] = 0;
} else if (mb_type & (MB_FOR | MB_BACK)) {
@ -641,7 +643,7 @@ static int mpeg_decode_mb(MpegEncContext *s,
for(i=0;i<2;i++) {
if (mb_type & (MB_FOR >> i)) {
s->mv_dir |= (MV_DIR_FORWARD >> i);
dprintf("mv_type=%d\n", motion_type);
dprintf("motion_type=%d\n", motion_type);
switch(motion_type) {
case MT_FRAME: /* or MT_16X8 */
if (s->picture_structure == PICT_FRAME) {
@ -1006,7 +1008,6 @@ static int mpeg2_decode_block_intra(MpegEncContext *s,
scan_table = ff_alternate_vertical_scan;
else
scan_table = zigzag_direct;
mismatch = 1;
/* DC coef */
component = (n <= 3 ? 0 : n - 4 + 1);
@ -1018,6 +1019,7 @@ static int mpeg2_decode_block_intra(MpegEncContext *s,
s->last_dc[component] = dc;
block[0] = dc << (3 - s->intra_dc_precision);
dprintf("dc=%d\n", block[0]);
mismatch = block[0] ^ 1;
i = 1;
if (s->intra_vlc_format)
rl = &rl_mpeg2;