[ECOS] mp3 or mpeg4 feasibility on eCos

Retallack, Mark (Siemens) mark.retallack@siemens.com
Fri Oct 3 08:01:00 GMT 2003


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
> and search the list archive: http://sources.redhat.com/ml/ecos-discuss
> 
> 
> 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>


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. 



-- 
Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
and search the list archive: http://sources.redhat.com/ml/ecos-discuss



More information about the Ecos-discuss mailing list