Login
Username:

Password:

Remember me



Lost Password?

Register now!
Sections
Who's Online
46 user(s) are online (35 user(s) are browsing Forums)

Members: 1
Guests: 45

mufa, more...
Support us!
Recent OS4 Files
OS4Depot.net
Report message:*
 

Re: Mplayer Altivec test version for G4 and PA6T-1682M

Subject: Re: Mplayer Altivec test version for G4 and PA6T-1682M
by LiveForIt on 2014/4/5 10:41:11

@Hans

I did some calculations on Amigaworld, it steams the the PCI bus should be OK at peek load, it most be the way I'm rendering into the graphic memory instead of letting DMA handle it.

Quote:

Overlay: 640x480x2 = 614 400 bytes / per frame
Composition (ARGB): 640x480x4 = 1 228 800 bytes / per frame.

Overlay: 768x576x2 = 884 736 bytes / per frame
Composition (ARGB): 768x480x4 = 1 474 560 bytes / per frame.

Overlay: 800x600x2 = 960 000 bytes / per frame
Composition (ARGB): 800x600x4 = 1 920 000 bytes / per frame.

Overlay: 1280x720x2 = 1 843 200 bytes / per frame
Composition (ARGB): 1280x720x4 = 3 686 400 bytes / per frame.

Overlay: 1920×1080x2 = 4 147 200 bytes / per frame
Composition (ARGB): 1920×1080x4 = 8 294 400 bytes / per frame.

50 frames per second.

The max bus speed on PCI 33Mhz is 133 MB/s ~ 2.66 Mb/frame
The max bus speed on PCI 66Mhz is 266 MB/s ~ 5.32 Mb/frame



I'm guessing that max pci bus values are more of theoretical value then actual value, as the bus is shared between devices.


I'm just afraid If I changed it to buffered memory, it might effect the speed on X1000.

As PCIe is really fast and buffered copy might just be hindrance instead of a benefit.
What do you think.
Powered by XOOPS 2.0 © 2001-2016 The XOOPS Project