The current code is a generalization of the earlier progressive MV
prediction code. This was supposed to predict MVs for both interlaced
and progressive pictures. But the interlaced MV prediction is buggy
and works mostly by luck.
This partially fixes interlaced MV prediction.
Signed-off-by: Anton Khirnov <anton@khirnov.net>
The code was mistakenly removed in cad16562c8.
It stored some motion vector data for future use in B-pictures.
This fixes Bugzilla bug #57.
Signed-off-by: Diego Biurrun <diego@biurrun.de>
When scaling backward predicted MVs in second B-field, the scaling table is
opposite of that for P field pictures; i.e. first field P table will be used as
second field B table and second field P table will be used as first field B
table. This is not documented in the spec, but exists in the ref. decoder.
This fixes SA10139.
Signed-off-by: Martin Storsjö <martin@martin.st>
shahriman AMS