[FFmpeg-devel] [PATCH][7/8] Add VA API accelerated H.264 decoding
Gwenolé Beauchesne
gbeauchesne
Thu Jan 29 17:51:31 CET 2009
Hi,
This patch adds H.264 decoding support through VA API.
The following sequence parameter set fields are now recorded:
bit_depth_luma_minus8, bit_depth_chroma_minus8,
residual_colour_transform_flag. I haven't found much information about
what the latter does exactly but I added it anyway. It seems to be
only useful to 4:4:4 high profiles, which VA API does not really
support.
I also chose to record {luma,chroma}_weight_l[01]_flag because they
were not reconstructable easily.
Note: though this works well on NVIDIA cards (through VDPAU), there
are still visual problems with some bitstreams on Intel
implementation. The latter is more picky to the way the PictureParam
and SliceParam blocks are filled in.
Regards,
Gwenole
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