14 Sep
2012
14 Sep
'12
4:57 p.m.
I have the same problem and from what I understand, the problem is that the alsa driver
for the rpi lacks functionality ( mmap support) required by jack.
I was thinking about writing a new jackd driver backend using the omxlayer available on
the rpi, and bypassing alsa, but before doing that I would need to know more about the
jackd driver interface and what functions would be required to implement. I am only
interested in audio output, so my aim was to limit the driver to the required output
functions.
Any help, suggestions or guidance would be most welcome.
Thanks
Lars
Skickat från min iPhone
14 sep 2012 kl. 12:39 skrev Parisson <lists(a)parisson.com>om>:
Hi!
I'm trying to get JACK working on this great tiny box:
pi@raspberrypi ~ $ jackd -dalsa
jackdmp 1.9.9
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2012 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
JACK server starting in realtime mode with priority 10
Cannot lock down 82274202 byte memory area (Cannot allocate memory)
Bus error
As ALSA is OK (i.e. aplay is playing good) and RAM=192M, is there any JACK
parameter I could tune in to reduce the memory size lock?
This pb seems unresolved yet:
http://www.raspberrypi.org/phpBB3/viewtopic.php?f=41&t=5787
Yomguy
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