[XviD-devel] multithreaded pvop-ME

[Bryan Mayland]

Radek Czyz wrote:
> How it works: each thread gets every second (third, fourth etc, 
> depending on # of threads) row of macroblocks. It keeps record of how 
> many MBs has already been processed in any line, and it also has 
> access to the same record for the line above it.
    I wrote something similar, except I do it where any thread can do 
any block based on the requirement that the topright and left block are 
already done.  Here's my numbers on an X2 4600+ (gotta love these 
processors).
Clip is MPEG2 640x480, encoding to no b-frames, VHQ4
Original: 33:26  (50% utilization)
BryyMT: 20:08 (83% utilization)
So we both see the same 39% improvement it seems.  Mine requires a mutex 
and a signal though.