So I think what I would do is make a "combined" sink for each class of
data that routes all audio to all sources. If you disable the module to
gets rid of idle streams this will leave you with active but corked
streams to all output devices from each sink. You can then update which
streams are muted. If you need to do this literally stream by stream (as
in playback event by playback event) this might not work because I am
just using the text interface (basically what pacmd is) and would have
no way of being notified when a new stream is played. If on the other
hand the routing is more global and based on external events you could
easily update the current config and then all future sounds would play
as expected.
I'm not at home right now, but I will try to remember to forward my code
tonight or tomorrow morning. If you really can't wait I sent an older
version to the mailing list a while back, it should be in the archives.
Matt
Nick Thompson wrote:
Awesome Matt, if you can share your source I would love to see it.
What you are doing sounds interesting.
For my app I'd like to have two classes of data. For arguments sake
these are "normal" and "alert". Normal audio (mp3, wav, application
data) needs to be routed to the currently selected output. Alert
audio, which would include system sounds, tactile feedback and the
like, would need to be routed to a different source (and possibly also
the default output source as well). Initially I was looking at some
sort of stream tagging mechanism using something like the class filed
in ALSA, but this is clunky and I cannot guarantee that all audio will
pass through alsa (for example the gstreamer pulse plugin looks
interesting for certain apps). At the moment I'm trying to prototype
this on a regular x86 desktop system, later I'll move it to an
embedded system, once I've figured out a means to implement it.
It think the issue I have can be described as follows: based on my
current understanding I would need to track every stream to determine
where to route it. I'd like to cluster my normal and alert streams
together and route them all en-masse to a sink.
Thanks!!
Nick
On May 2, 2008, at 10:37 AM, Matt Patterson wrote:
I do agree that coding for pulse can be a steep learning curve,
which is why I opted to build all my solutions by simply connecting
to the text mode control socket and sending commands/parsing text
output. I have built what is essentially a multiplex audio switch
allowing any of x number input sources to play out of any x number
of output sinks, all controlled via a python or php app.
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