Acceleration in our pockets

David Samblas Martinez dsamblas at
Thu Jun 12 16:52:07 CEST 2008

I copy & paste an very interesting comment from balrog ,seems that I have become his(totally voluntary) mail list assistant ;)

Rasterman..... 352x288 25 fps..... something to say?

--------------Begin of comment-----------------------
#  balrog Says:
June 11, 2008 at 4:20 am

Mikko: I hope we’ll eventually see more than just MPEG support on the Glamo (3D stuff etc). Regarding QVGA at this moment it’s a conjecture…
and at this moment it’s confirmed. I’ve just tried QVGA and while the colours became a bit undersaturated and gamma seems to be too high, I got full 25fps playback both straight and with rotation, hw-scalled from 352×288 to 240×320 or 320×240. Unfortunately tslib seems to not have noticed the change and still reports touch coords in 0…640 range.

i_m_bison: Darude_-_Feel_the_beat.mp4 (the video is ok, the music not so much:))

tuXXX: I was wondering about that too, but rather MPEG decoding on the CPU and scaling/rotation on Glamo - this would allow us to do more stuff concurrently. The other way, as Mikko notes you transfer the video to the VRAM, then back to the RAM and then back to the VRAM and the bus becomes a bottleneck. In the current setup and normal usage I don’t agree with Raster that 7M/s is a bottleneck, it’s rather hard to saturate with normal X usage even coupled with SD card traffic etc.
----------End of comment------------------------------
Raster, I'm really happy that you where so wrong at this topic

--- El jue, 12/6/08, Joerg Reisenweber <joerg at> escribió:

> De: Joerg Reisenweber <joerg at>
> Asunto: Re: Acceleration in our pockets
> Para: community at
> CC: "Peter Nijs" <peter at>
> Fecha: jueves, 12 junio, 2008 2:37
> Am Do  12. Juni 2008 schrieb Peter Nijs:
> > Isn't the shared bus an advantage because now it
> can use DMA? Maybe that's 
> > why  
> > it is possible to hook up an sd-card to the glamo
> anyway. I see no other 
> > explanation why one would put an sd cardreader in a
> graphics ship. Please 
> > tell me if and why I'm wrong.
> > 
> > Peter
> > 
> Good point. Would make perfect sense...
> /j_______________________________________________
> Openmoko community mailing list
> community at

Enviado desde Correo Yahoo! La bandeja de entrada más inteligente.

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