linuxaudio.org

On 10/21/05, Lee Revell  wrote:

quoted text
> On Fri, 2005-10-21 at 23:27 +0400, Dmitry S. Baikov wrote:

> > > Are you using a customized jackd?  What version?  What command line?  Do

> > > you have any evidence that anyone has ever made this work?

> > >

> > Opps, sorry for skipping obviously needed details. Was really upset.

> > I tried freebob + jackd from freebob.sf.net.

> > libavc from svn, libiec61883 1.0, libraw1394 1.2

> > cmdline: jackd -d iec61883 -o osc.udp://localhost:31000

> >

> > FreeBoB wiki's list of working setups contains FA-101 + gentoo (my distro).

> > When run in the first time, jackd starts, but there's no sound, and

> > seems processing callbacks aren't called (no interrupts?).

>

> I think this would be a better question for the Freebob list, and cc:

> the jackit-devel list, as you're using a version of JACK that the

> Freebob people have customized.  I've never heard anyone on LAD or LAU

> report that this works.

>

> First and foremost, we need to get the iec61883 driver into JACK CVS, so

> that Paul Davis and the other JACK experts can help you.

>

> Lee

In case some folks don't know this stuff iec61883 is part of the 1394

stack. Why would it go into Jack CVS?
My rudimentary understanding (from a good awful number of years

working on 1394 OHCI Link and Phy chips - not software) is that

iec61883 is an encapsulation process that places timing info and data

packets into a larger chunk of data most commonly moved across, but

not limited to, the 1394 bus. 61883 is a really basic way to get MPEG

data broken apart and put back together so that you can move movies

across 1394.
NOTE: There are multiple parts, 6 or 7 now, to iec61883. I'm not sure

which ones Linux-1394 is supporting.
>From a cursory reading of the Freebob list I have not heard of any

special versions of Jack required to run it, but I frankly haven't

paid a huge amount of attention to it. Does anyone know?
I do agree that this question belongs there. They seem to respond

pretty quickly to questions like this.
- Mark