[haiku-bugs] Re: [Haiku] #8476: Spare HDA jacks available - how can we address them?
- From: "ttcoder" <trac@xxxxxxxxxxxx>
- Date: Mon, 20 Aug 2012 21:35:54 -0000
#8476: Spare HDA jacks available - how can we address them?
---------------------------------+----------------------------
Reporter: dsuden | Owner: korli
Type: enhancement | Status: new
Priority: normal | Milestone: R1
Component: Drivers/Audio/HDA | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
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Comment (by ttcoder):
In a few days I'll try the "2 streams with 2 channels each" approach.
Today I tried the "1x4" (1 output stream with 4 channels) approach but it
does not seem to work:
- Modified hda_multi_audio.cpp so that get_description() returns 4
outChannels of type B_MULTI_OUTPUT_CHANNEL and so that
get_enabled_channels() enables them.
- Toyed with hda_controller.cpp (see below).
Things looked good initially: the media preflet drop-down box does list 2
items instead of one now (output 0 and output 1).
I then tried to select "output 1" (instead of 0) in the media Preflet and
restarted media a couple times, but apparently there is a bug in the
media_server: when running Cortex I see that the main Mixer is still
connected to HDA's first input, not to the second. Or maybe the bug is in
the driver, maybe it needs to expose something else publicly so the
media_server will instruct it to aim channels #2 and #3 at the output
instead of channels #0 and #1... Did not find any reference to that in the
source though, except for the [http://cgit.haiku-os.org/haiku/tree/src
/add-ons/kernel/drivers/audio/hda/hda_controller.cpp#n724 hda_controller]
one I toyed with a bit. I can include a screenshot of Cortex if that
helps, the mixer is still connected in the same way no matter which
"output" is selected in the preflet.
Lastly I tried to force a connection to that second output from TTCC, and
then from the "ToneProducer" addon but still to no avail. This is likely
not a user error on my side, because connecting TTCC or ToneProducer works
fine when I do that to the first output...
Had I been able to select one or the other that would be promising, and
the next test would have been to send the compiled driver to Dane for him
to try simultaneous playback of two different audio playbacks to two
outputs (my HDA here only has one output)... But if the basics won't work
here it won't work for him in a more complex setup either. So next I'll
turn my attention to the "twin streams" tactic I think, though that will
be a tougher nut to crack.
--
Ticket URL: <http://dev.haiku-os.org/ticket/8476#comment:13>
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