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List:       kde-devel
Subject:    Re: decoding audio data (ogg, mp3, ...) through aRts
From:       Stefan Westerfeld <stefan () space ! twc ! de>
Date:       2002-02-28 14:28:55
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   Hi!

On Wed, Feb 27, 2002 at 04:15:04PM +0100, Sebastian Trueg wrote:
> For my cd writing app I want to support sound conversion of all sound formats 
> supported by aRts. As far as I understood aRts it should be very easy to 
> create and connect the appropriate modules to i.e. convert an ogg file to a 
> raw audio stream. But I have no idea where to look for the modules and how to 
> use them since I could not find enough docu. (I managed using PlayObjects to 
> play all the formats)
> Could someone please help me and show my how or where to start.

Well, the interfaces that aRts currently provides are really just PlayObjects.
The motivation for going for this first was, that using this as abstraction,
it should be easy to manage even media types that don't have any audio stream
(like midi files or pure video files), and to give the implementor of the
decoder a lot of freedom how exactly a media gets played. It might be useful
to standarize on interface which only decode/encode, and to build PlayObjects
on top of that, maybe in conjunction with the video capabilities people are
working on right now, but nothing has been done in this area yet.

That said, it is possible to somewhat use PlayObjects for decoding only, but
some of them might not really designed for this. An example how to do it can
be found in arts/examples/playtofile*.

   Cu... Stefan
-- 
  -* Stefan Westerfeld, stefan@space.twc.de (PGP!), Hamburg/Germany
     KDE Developer, project infos at http://space.twc.de/~stefan/kde *-         
 
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