Re: [linux-audio-dev] Audio routing issues for linux..

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Subject: Re: [linux-audio-dev] Audio routing issues for linux..
From: Joern Nettingsmeier (nettings_AT_folkwang-hochschule.de)
Date: Tue Jun 11 2002 - 18:34:24 EEST

François Déchelle wrote:
>
>
> If I understand clearly the point, the foreseen working scheme would
> be the following, using alsaserver and JACK:
>
> App1 <->|<-> OSS |<-> ALSA <->| JACK <-> PCM HW
> App2 <->| | server |
> ... <->| | |
> App'1 <->| |
> App'2 <->| |
> ... <->| |
> App"1 <->|
> App"2 <->|
> ... <->|

iiuc, jack does not access the hardware directly. instead it uses a
plugin which in turn talks to the alsa kernel driver or possibly other
systems (not implemented).

...
> Another question: can the OSS emulation lay on top of an ALSA
> shm device and not on top of a hardware device ?

OSS emulation takes place in the kernel, i.e. it does not touch
alsa-lib. therefore it only allows for direct hardware access. libaoss
might be what you want - it redirects oss applications so that they can
use alsa-lib functions. but it requires an LD_PRELOAD around the oss
application.

best,

jörn

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