Decodes 16-bit WMA Lossless encoded files. 24-bit is not supported yet.
Bitstream parser written by Andreas Öman with contributions from
Baptiste Coudurier and Ulion.
Includes a number of bug-fixes from Benjamin Larsson, Michael Niedermayer and
Konstantin Shishkov, shine and polish by Diego Biurrun.
Signed-off-by: Diego Biurrun <diego@biurrun.de>
MVDATA may or may not be transmitted. If it is not, both
dmv_x and dmv_y is to be assumed zero.
This may not trigger wrong picture in all systems, but
it's a bug nevertheless. Fixes SA10116.vc1 on my 64-bit
Windows 7.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
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>
