[Nouveau] [Bug 89969] vaDriverInit fails with gallium/nouveau driver

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89969

--- Comment #6 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Unlike public API's, gallium API's are fluid and not extremely well-defined.
They're primarily defined by the existing users, and secondarily by
documentation when those users disagree. Video API's are especially poorly
defined, as there are only 2 real driver implementations (radeon + nouveau),
and until recently, only st/xvmc and st/vdpau (and everyone except me hates
st/xvmc).

I believe that st/va had to make some changes to how functions were called and
what parameters they were allowed to have, but the updates were only made to
the radeon drivers. Unfortunately I don't know what those updates were. Emil
mentioned chunked decoding, but I don't really know what that is. Perhaps you
can look at the st/va enablement patches for radeon and see what all they had
to change.

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