Acceleration in our pockets

Carsten Haitzler (The Rasterman) raster at openmoko.org
Fri Jun 13 02:47:05 CEST 2008


On Thu, 12 Jun 2008 19:22:30 +0000 (GMT) David Samblas Martinez
<dsamblas at yahoo.es> babbled:

> Hehehe definitively you have something to say :) 
> oops I thought that I have erased this final this so unfortunate sentence  so
> please accept my apologizes lets joy the fact that the glamo will not be a
> wasted chip 

it never was wasted, but it's not the ultimate solution to everything either.
i'm still wondering where i was so "wrong"? 

> --- El jue, 12/6/08, Carsten Haitzler <raster at openmoko.org> escribió:
> 
> > De: Carsten Haitzler <raster at openmoko.org>
> > Asunto: Re: Acceleration in our pockets
> > Para: dsamblas at yahoo.es, "List for Openmoko community discussion"
> > <community at lists.openmoko.org> CC: "David Samblas Martinez"
> > <dsamblas at yahoo.es> Fecha: jueves, 12 junio, 2008 6:58
> > On Thu, 12 Jun 2008 14:52:07 +0000 (GMT) David Samblas
> > Martinez
> > <dsamblas at yahoo.es> babbled:
> > 
> > nb - i codec only - and i also used mplayer at the time.
> > mpeg1, mpeg2, not to
> > mention a myriad of other codecs won't work there, and
> > it still only producing
> > qvga video.
> > 
> > if you do follow prior threads on this, you will notice
> > that i never covered
> > the mp3 decode of the glamo. that's always possible,
> > but as such to do well
> > would need a generic codec-level api supporting it - like
> > openmax.
> > 
> > > 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 openmoko.org> escribió:
> > > 
> > > > De: Joerg Reisenweber <joerg at openmoko.org>
> > > > Asunto: Re: Acceleration in our pockets
> > > > Para: community at lists.openmoko.org
> > > > CC: "Peter Nijs"
> > <peter at familienijs.be>
> > > > 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 lists.openmoko.org
> > > >
> > http://lists.openmoko.org/mailman/listinfo/community
> > > 
> > > 
> > >       ______________________________________________ 
> > > Enviado desde Correo Yahoo! La bandeja de entrada más
> > inteligente.
> > > 
> > > _______________________________________________
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> > > community at lists.openmoko.org
> > > http://lists.openmoko.org/mailman/listinfo/community
> > 
> > 
> > -- 
> > Carsten Haitzler (The Rasterman)
> > <raster at openmoko.org>
> 
> 
>       ______________________________________________ 
> Enviado desde Correo Yahoo! La bandeja de entrada más inteligente.
> 
> _______________________________________________
> Openmoko community mailing list
> community at lists.openmoko.org
> http://lists.openmoko.org/mailman/listinfo/community


-- 
Carsten Haitzler (The Rasterman) <raster at openmoko.org>




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