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Summary:ASTERISK-05610: chan_oss no audio path - one way audio path
Reporter:Tracy Carlton (carltont)Labels:
Date Opened:2005-11-15 09:43:18.000-0600Date Closed:2011-06-07 14:03:27
Priority:MajorRegression?No
Status:Closed/CompleteComponents:Channels/chan_oss
Versions:Frequency of
Occurrence
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Issues:
Environment:Attachments:
Description:When using a half-duplex sound card (for paging app) there is no audio in either direction (to sound card output or from mic input).Using a full-duplex sound card produces a one-way audio path - from mic input to originating extension (backwards from the desired function :) ).  I have confirmed this now with three different MBs with onboard soundcards (all half-duplex) and using two different models of SoundBlaster full-duplex cards (SB Live and SB 512 PCI).  Renaming and recompiling with the old chan_oss works as expected - No support of half-duplex, working correctly with either SB card.  
Comments:By: Kevin P. Fleming (kpfleming) 2005-11-15 21:03:04.000-0600

Luigi, can you try to help this user figure out what the problem is? It appears to be caused by your re-written chan_oss module.
By: Luigi Rizzo (rizzo) 2005-11-16 01:22:29.000-0600

if you can contact me by email (rizzo@icir.org) we can try to sort out
the details - basically i need to know what options are you using in
oss.conf and how are you activating the channel from the dialplan.
Also, knowing which OS you are using would help.
thanks
By: Tracy Carlton (carltont) 2005-11-21 09:04:49.000-0600

I emailed rizzo on 11/16/05 with the requested info.  Have not had a response since.
By: Luigi Rizzo (rizzo) 2005-11-21 09:15:25.000-0600

carltont: i am sorry but i probably missed that... or my spamfilter killed i
(see http://info.iet.unipi.it/~luigi/ to see why i need a very
aggressive one!).
Could you resend it or post your email so i can contact you ? ?
By: Tracy Carlton (carltont) 2005-11-21 10:59:15.000-0600

rizzo you can contact me at tracy at ycic dot net.

I'll also resend the email as well.

Thanks,
Tracy
By: Luigi Rizzo (rizzo) 2005-11-24 10:57:33.000-0600

sorry but i cannot reproduce the problem locally.
With "autoanswer = yes" in oss.conf, an incoming call routed to chan_oss e.g.
with this in your dialplan:

   exten => s,1,Dial(Console/dsp) ;

will be answered immediately and incoming sound routed to the speaker
as expected.

Make sure you are using at least rev.1.61 of chan_oss.c because that
version might fix a potentially related bug.
Other than that, I don't know, it does not seem that there is a problem here.

If your concern is half duplex support, that's another story - it unsupported
at the moment. What the previous version did was "one way audio", not
really "half duplex" (meant as a channel where you can switch between
one direction and the other). If there is demand i can try to restore
one-way audio operation.
By: Tracy Carlton (carltont) 2005-12-02 00:34:24.000-0600

Rizzo,  

I'm using the 1.63 version that is included in the asterisk 1.2 release tarball and have now tried 4 different models of Soundblaster full-duplex sound cards on 3 widely different PCs - P3 Aopen, P4 - Intel, P4 Abit, SB Live(2 sub models), SB 512, SB Live 24bit sound cards.  I've also spoken with two other people having the same issue.

Perhaps if you sent me your working chan_oss.c file and oss.conf files I can try them on my systems and see what I can see.
By: Tracy Carlton (carltont) 2005-12-08 09:15:37.000-0600

This issue has been solved.

It related to Centos 4.x's sound card driver support and its interactions with chan_oss.  It is correctable using the alsa utilities (not installed by default). SORRY!

Thanks,
Tracy