[MPlayer-dev-eng] Optimized SwScale code
Felix Buenemann
atmosfear at users.sourceforge.net
Wed Oct 17 16:41:59 CEST 2001
Hi,
great work Michael.
Here are my conclusions so far:
playing 480x480 svcd zooming to 640x480, cliplength ~60sec, system is PIII
850, 100MHz FSB, 256MB, SavageMX 8MB, XFree 4.1.0, Kernel 2.4.10-ac9:
ASM: 83sec
MMX: 48sec
MMX2: 40sec
(the mmx2 version is fast enough to play without -framedrop)
Upscaling:
to 640x480: works fine with ASM, MMX
colored ghost picture with MMX2
to 768x576: works fine with ASM, MMX
colored ghost picture with MMX2
it seems the ghost picture is cause by the red color plane being shifted
8pixels to the right.
Dowscaling:
to 384x288: horizontal interlaced like effect with ASM, MMX
horizontal and vertical interlaced like effect with MMX2
to 352x264: horizontal interlaced like effect with ASM, MMX
horizontal and vertical interlaced like effect with MMX2
to 320x240: image looks dark and red with ASM, MMX, MMX2
The red picture only happens if height is exactly original height divided by
two.
--
Best Regards,
Atmos
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