Subject: Re: [linux-audio-dev] Idea: fake OSS passback driver
From: Jan Weil (Jan.Weil_AT_web.de)
Date: Sun Feb 01 2004 - 13:05:19 EET
On Sun, 2004-02-01 at 11:02, Daniel Risacher wrote:
> Background:
>
> Despite the various and sundry advances in linux audio, I find there
> are still legacy apps that are built against the OSS API. This is
> problematic since the legacy OSS model has blocking semantics. To get
> multiple audio streams, one must use an audio server such as esd,
> aRts, etc. Wouldn't it be nice if all the legacy apps "just worked"?
> Without blocking each other?
>
> Idea:
>
> Suppose one were to write a kernel module that implemented the OSS
> API, but had non-blocking semantics, and instead of driving a sound
> card, the module encapsulated the OSS API calls somehow and passed
> them back to a user-space audio server.
I might be wrong, but I think this is already possible using the dmix
plugin from alsa-lib.
You'll have to setup a dmix slave and make your OSS emulation use it.
Never tried it myself, though.
So take this with the usual grain of salt.
Jan
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