Thomas Witzel wrote: > On Wednesday 25 October 2006 23:13, Romain Lenglet wrote: > > I believe that most people wanting real-time audio use JACK > > instead of ALSA. All "serious" audio software on Linux use > > JACK: Ardour, Rosegarden, etc. > > Its design allows for real-time audio, better than ALSA. > > http://jackaudio.org/ > > > > I believe that you could easily port JACK to Xenomai, > > transparently for client apps, and then interface an > > RTDM-based driver to JACK. > > > > There is already an alternative implementation of JACK > > specifically for IEEE1394 audio interfaces: > > http://freebob.sourceforge.net/index.php/Main_Page > > You could get inspiration from this implementation. > > Maybe I understand this wrong, but it seems to me that Jack > itself does not provide lowlevel drivers for the hardware, but > in most cases sits on top of ALSA.
JACK has several backends, including ALSA. But the Freebob backend does implement its own drivers, in userspace, using the libraw1394, etc. Since you wanted to develop/port your own device driver anyway, I just suggested to use JACK as an interface with your applications, instead of the ALSA interface. I believe that the JACK API/interface is better suited for realtime applications. So why not develop your own new JACK hard-realtime backend with your RTDM driver? > Also most applications seem > to use Jack to control other professional devices via MIDI or > 1394. No. JACK has been designed to pass/route audio data in realtime and with low latency between applications, and to/from drivers. It can also route MIDI data, but that is not its main purpose. Freebob is an implementation of a JACK backend that provides drivers for IEEE1394 audio interfaces, without using ALSA drivers. -- Romain LENGLET _______________________________________________ Xenomai-help mailing list [email protected] https://mail.gna.org/listinfo/xenomai-help
