[FFmpeg-devel] [PATCH][VAAPI] VC-1: fix decoding with some WMV3 clips

[Gwenole Beauchesne]

Hi,

This patch fixes decoding of some WMV3 clips with an odd number of 
macroblocks per line. The driver expects bitplanes data of two macroblocks 
in a single byte. The former approach could overflow and/or produce 
garbage.

Thanks to Michael Kornfeld for noticing the bug on ZDF streams and the 
original patch I simplified into no-extra-comparisons-required.

Checked with both psb and iegd drivers for GMA500.

Regards,
Gwenole.
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