dsputil: Split off H.263 bits into their own H263DSPContext
h263dsp: K&R formatting cosmetics

Also remove array element numbering comments.
metasound: Fix error message argument

Signed-off-by: Diego Biurrun <diego@biurrun.de>
avienc: drop the vfr flag.

AVI does not really support vfr properly, only by padding with null
packets.
wip:vda

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
hwaccel: Simplify ff_find_hwaccel

It is always called by passing fields from an AVCodecContext.
hwaccel: Support global init functionality

HW accelerators requiring special data from outside could get it from
avoption.
wip: videotoolbox support

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>