Subject: Re: [linux-audio-dev] Realtime
From: David Olofson (david_AT_gardena.net)
Date: Sat Jul 08 2000 - 09:07:43 EEST
On Wed, 28 Jun 2000, yodaiken_AT_fsmlabs.com wrote:
> On Tue, Jun 27, 2000 at 11:20:15PM -0400, Paul Barton-Davis wrote:
> > the ALSA drivers currently represent a minimum of 64000 C statements
> > (i counted semicolons in the files; there are 174,000 lines in total,
> > including comments).
> >
> > although i strongly suspect that most of the work involved in porting
> > them to RTLinux could be done with a portability "wrapper", i also
> > strongly suspect that we'd have to go over every single line of every
> > file and check it for various assumptions.
>
> My guess is not, but code settles all such questions.
My experience after doing it with the es1370 driver is that there are
some Linux interface constructs that are a bit tricky to get right,
but the rest - most of the code - only requires that you one way or
another replace Linux specific operations with RTL code with the same
semantics. When you have the *methods* figured out, doing it on more
drivers is more of a copy/paste job.
The biggest problem is probably that things are done in slightly
different ways in different drivers, which may be a bit confusing, at
least if you're not an experienced Linux kernel hacker.
//David
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