#619: Autodetection always shows one device per sound card but sometimes could
have more tha one
--------------------------+-------------------------------------------------
Reporter: howl | Owner: lennart
Type: enhancement | Status: reopened
Milestone: | Component: module-hal-detect
Resolution: | Keywords:
--------------------------+-------------------------------------------------
Comment(by howl):
Replying to [comment:14 lennart]:
> Now, the big problem here is that we cannot auto detect whether spdif
and analog are exclsuive to each other or not. Currently we try every
combinatin of input and output and if it works add it to our list of
working profiles. However, if we change this logic to also test every
combination of analog out and spdif out then we have a problem: we cannot
distuingish the case where the card supports hw mixing but only one output
at a time and where the card supports two simultaneous and independant
outputs. That means on some hardware we'd expose a profile "spdif out +
analog out" which would actuallly mix and output to one, or to both
outputs. And we certainly don't want to expose that.
First I will tell you that your approach is failing with this, with your
auto profiles make by combination I can select "Output Digital Stereo
(IEC958) + Input Digital Stereo (IEC958)", when the same alsa-mixer has
and switch to turn the iec958 in output or capture mode, then your system
to detect if profiles combination works fails, al least is some hardware
like the one included in M3N78-VM, I said this before.
http://pulseaudio.org/attachment/ticket/619/pulse-config-example.jpg
The idea is start selecting the sound card to configure, then the output
(this could be called device as we could configure also inputs). We could
enable or disable the selected output and also set the number of channels
of it. The test button doesn't need explanation, something like speaker-
test. The Remap button could be used for situations like the one we have
with the hdmi now a days, you press the Remap button and then the first
speaker starts to sound, then the user must click the corresponding
speaker in the picture, when finished the mappings should be ok. An
interactive and easy way to remap a device, the remap could be saved in
/usr/share/pulseaudio/... in a file called "devicename.conf" with the
corresponding rules to be applied only to the pertinent device.
This could prevent other issues, for example with the profiles when you
are playing sound in Analog for example and select another self-made
profile that have multiple outputs including the Analog that is already
with applications active on it, sometimes applications lost the stream
sometimes not, with the system I'm proposing this shouldn't happen, if I
want to Enable HDMI should not affect the other outputs.
--
Ticket URL: <http://pulseaudio.org/ticket/619#comment:16>
PulseAudio <http://pulseaudio.org/>
The PulseAudio Sound Server
_______________________________________________
pulseaudio-tickets mailing list
pulseaudio-tickets@mail.0pointer.de
https://tango.0pointer.de/mailman/listinfo/pulseaudio-tickets
