[XviD-devel] scene change detecting in Bframes mode

[Marco Al]

Marc FD wrote:

> i've finished to code a MMX SSD. it's faster, but i don't know how
> much, because i used avisynth as test env. i can send it to you when
> you want

For me a mmx version (just an inline assembly hack) with prefetch
manages about 1 ms for a 640*480 buffer (luminance only) on a 800 Mhz
Duron with 100 MHz DDR memory. About 3 times faster than C, most of the
gain coming from prefetch. Im a lousy coder though :) so a good version
might speed that up by a factor 2 or so and make it complete memory
bandwith limited ... even so, its pretty evident that this function has
negligible running time.

Marco