[ECOS] mp3 or mpeg4 feasibility on eCos

Satish Kumar satish@bvt.sc.sanyo.co.jp
Fri Oct 3 08:34:00 GMT 2003


well,
      My target board contains hardware based MPEG-4 encoder and MPEG-4
decoder and its controlled by ARM926EJ-S microprocessor..and supports
upto 64mb memory.
  so, whatz the exact role of software control over hardware using eCos..
can some one give me some more inputs..?

satish


On Fri, 3 Oct 2003 09:01:12 +0100 
"Retallack, Mark (Siemens)" <mark.retallack@siemens.com> wrote:

> I think the first question is what do you have?
> 
> How much memory do you have?
> 
> What type of processor are you running on?
> 
> Do you have an FPU? - There are already existing libraries that can do
> mp3/mpeg4 decompression that don't need an fpu. For example: 
> 
> 	http://www.underbit.com/products/mad/ (GPL)
> 	http://sourceforge.net/projects/ffmpeg (LGPL)
> 
> My first step would be to try and get ecos to compile with one of the above
> libraries and a simple test application. Then when/if you find that it
> works, decide if you want to go the third-party codec route (being very
> careful with the licences) or create you own codec. eCos has a POSIX API
> layer that should make porting easier(!). 
> 
> -----Original Message-----
> From: Satish Kumar [mailto:satish@bvt.sc.sanyo.co.jp]
> Sent: Friday 03 October 2003 08:43 AM
> To: Retallack, Mark (Siemens)
> Cc: ecos-discuss@sources.redhat.com
> Subject: Re: [ECOS] mp3 or mpeg4 feasibility on eCos
> 
> 
> so, what are the requirements if i have to develop an mpeg4/mp3 codec on
> eCos..i know its a damn broad question to answer. but if i could get
> some inputs , it would help me out to explore more..on this.
> 
> right now, i just have a redboot and eCos kernel running on my target
> board..
> 
> thanks
> satish
> 
> 
> 
> 
> On Fri, 3 Oct 2003 08:34:51 +0100 
> "Retallack, Mark (Siemens)" <mark.retallack@siemens.com> wrote:
> 
> > I see no reason why not.
> > 
> > Have a look at:
> > 
> > http://www.eetimes.com/story/OEG20000404S0024
> > http://www.linuxdevices.com/news/NS6493913129.html
> > http://news.zdnet.co.uk/business/0,39020645,2108278,00.htm
> > 
> > 
> > 
> > -----Original Message-----
> > From: Satish Kumar [mailto:satish@bvt.sc.sanyo.co.jp]
> > Sent: Friday 03 October 2003 08:13 AM
> > To: ecos-discuss@sources.redhat.com
> > Subject: [ECOS] mp3 or mpeg4 feasibility on eCos
> > 
> > 
> > Hi,
> >    Can someone let me know, why mp3 or mpeg-4 kind middleware`s
> > are difficult to develop/port on eCos. is eCos made for such 
> > applications..?
> >   what kind of applications are usually targeted to work on eCos..?
> > 
> > thanks,
> > saty
> > 
> > -- 
> > Satish Kumar <satish@bvt.sc.sanyo.co.jp>
> > 
> > 
> > -- 
> > Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
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> > 
> > 
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> > 727817, England. 
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> 
> -- 
> Satish Kumar <satish@bvt.sc.sanyo.co.jp>
> 
> 
> Siemens Traffic Controls is a division of Siemens plc. Registered No.
> 727817, England. 
> Registered office: Siemens House, Oldbury, Bracknell, Berkshire, RG12 8FZ. 
> 
> This communication contains information which is confidential and 
> may also be privileged. It is for the exclusive use of the addressee. 
> If you are not the addressee please note that any distribution, 
> reproduction, copying, publication or use of this communication 
> or the information in it is prohibited.  If you have received this 
> communication in error, please contact us immediately and also 
> delete the communication from your computer. 
> 

-- 
Satish Kumar <satish@bvt.sc.sanyo.co.jp>


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