On 2011-03-10 22:47, Margarita Olaya wrote:
Hi,
I have some initial code for jack sense implementation, the approach
is to listen /dev/input/eventX and pass that data as argument to a new
module called module-jack-detect where a thread wakes when the jack
has been inserted.
Using the current code I'm able to catch jack insertion and removal,
next step is to signal PA core when the jack has been inserted so this
calls a hook in the PA UCM module to load the ucm configuration for
jack.
Jack sense is something that we all want, so it's great that someone is
working on it.
The first tricky thing is to match /dev/input/eventX against the proper
card - that is, if you have three cards, all with headphone outputs, you
must know which card your event belongs to. Is this solved in your git
tree? I had a quick look but couldn't find code for doing that. (You
also seem to add threads for all eventX, even those not audio related at
all, could this be improved?)
So, I need to send a message to any other interested module but I'm
sure how implement it, Can a hook be used to signal PA core?
The second thing is to figure out what we should really do once we have
detected jack insertion or removal. Adding a hook event and let other
modules act on that, seems reasonable to me. But we should also add a
property to the property list (or something similar?) telling the
current state of the jack - and btw, can this be figured out by reading
from /dev/input/eventX at startup?
--
David Henningsson, Canonical Ltd.
http://launchpad.net/~diwic
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