[x264-devel] Evaluating x264 -- first steps encoding greylevel images

[Jason Garrett-Glaser]

On Mon, Mar 15, 2010 at 1:18 PM, Eeri Kask <Eeri.Kask at inf.tu-dresden.de> wrote:
> Am 03/15/2010 09:08 AM, Jason Garrett-Glaser <darkshikari at gmail.com>
> schrieb:
>>> Should this appear true, then the decoder should look much like the
>>> one for I420 which we have already, even marginally simpler and
>>> faster indeed (due to not having to deal with reduced chroma
>>> resolution), so one would be tempted to just reuse the already
>>> existing code (for this special case, for now)... ? :-)
>>
>> If by "marginally simpler and faster" you mean "a 10,000 line patch
>> affecting all facets of x264", sure.
>
>
> Only to recapitulate, it appears something like ... 40% of the
> codebase needs replacing in order to ... double the width/height of
> the U, V planes in the encoder?   Oh, this is hefty indeed...

It doesn't help that the specification uses a completely different
method for coding 4:4:4 than 4:2:0...

Dark Shikari