[MPlayer-dev-eng] VSYNC/Double Buffering in vo_vesa

[Felix Buenemann]

Hi,

I added support for disabling and enabling vsync in doublebuffered mode of 
vo_vesa and I noticed that I could get a ~90% !!! speedup by disabling vsync 
with no visual difference.

Here are my benchmarks:
(Notebook PIII-Cu 850, BX440, 256MB, Savage/MX 8MB AGP, 1024x768 at 60Hz)

./mplayer /download/samples/ac3/matrix.vob -cache 8192 -zoom -x 1024 -y 768 
-sws 0 -vo vesa -quiet -pp 0x20000 -nosound -benchmark:
BENCHMARKs: V: 101.107s VO:   0.008s A:   0.000s Sys:   3.093s =  104.208s
BENCHMARK%: V: 97.0241% VO:  0.0080% A:  0.0000% Sys:  2.9679% = 100.0000%
Visual: Flickering OSD, Tearing Effect (realtime)

./mplayer /download/samples/ac3/matrix.vob -cache 8192 -zoom -x 1024 -y 768 
-sws 0 -vo vesa -quiet -pp 0x20000 -nosound -benchmark -double -vsync:
BENCHMARKs: V: 100.447s VO:  85.347s A:   0.000s Sys:   2.907s =  188.701s
BENCHMARK%: V: 53.2308% VO: 45.2286% A:  0.0000% Sys:  1.5406% = 100.0000%
Visual: Nice OSD, No Tearing Effect (too slow)

./mplayer /download/samples/ac3/matrix.vob -cache 8192 -zoom -x 1024 -y 768 
-sws 0 -vo vesa -quiet -pp 0x20000 -nosound -benchmark -double -novsync:
BENCHMARKs: V: 101.407s VO:   0.046s A:   0.000s Sys:   3.084s =  104.537s
BENCHMARK%: V: 97.0060% VO:  0.0438% A:  0.0000% Sys:  2.9502% = 100.0000%
Visual: Nice OSD, No Tearing Effect exactly like with VSync enabled (realtime)


Some usefull MPlayer output:
MPlayer CVS-020211-22:58-2.95.3 (C) 2000-2002 Arpad Gereoffy (see DOCS!)
VIDEO:  MPEG2  720x480  (aspect 2)  29.97 fps  12250.0 kbps (1531.2 kbyte/s)
VO: [vesa] 720x480 => 1024x768 Planar YV12 zoom 
vo_vesa: Found VESA VBE BIOS Version 2.0 Revision: 100
vo_vesa: Video memory: 8192 Kb
vo_vesa: VESA Capabilities: 6-bit DAC, VGA CRTC, normal RAMDAC, no 
stereoscopic, no stereo
vo_vesa: OEM info: S3 Incorporated. M7 BIOS
vo_vesa: OEM Revision: 100
vo_vesa: OEM vendor: S3 Incorporated.
vo_vesa: OEM Product Name: VBE 2.0
vo_vesa: OEM Product Rev: Rev 1.1
vo_vesa: Using VESA mode (14) = 117 [1024x768 at 0]
vo_vesa: Using DGA (physical resources: F0000000h, 00800000h)

-- 
Best Regards,
	Atmos
____________________________________________
- MPlayer Developer - http://mplayerhq.hu/ -
____________________________________________