[linux-audio-dev] Re: [Alsa-devel] IEEE 1394

[Paul Davis]

>I would like to ask about situation in Linux about one problem.
>Does Linux kernel or Alsa drivers supports IEEE 1394 standart?
>
>If yes, could you recomend me some references and advices to be able to =
>use it
>and program it to create applications with IEEE 1394?
>
>If no, could you recomend me some advices or some documentation to be =
>able
>to create IEEE 1394 driver?

for audio+MIDI, there is no fully-defined standard yet. linux already
has a compliant 1394 driver, but you normally need extra protocols on
top of this for moving specific kinds of data around. IEEE has defined
one (IEC61883-6) for audio+MIDI, based on mLAN, and I believe you can
get the specs from them or the AES.

However, it doesn't support any connection management, so all
endpoints have to be explicitly identified by the user, and everything
has to be explicitly delivered. Yamaha submitted their scheme for CM
to the 1394 trade association as the "AV/C Music Subunit". its been
released but not implemented (even by Yamaha) because Yamaha are
changing mLAN again. Basically, to quote from someone who really knows
this stuff:

  "So a streaming driver using a format compatible with mLAN devices is
   not a problem at this stage - it is possible to direct audio/MIDI to
   mLAN devices and pick up audio and MIDI, but not in a flexible
   manner. The connection management architecture first needs to settle."

--p

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