[asterisk-bugs] [Asterisk 0014216]: Random audio dropouts when jitterbuffer = yes

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=14216 
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Reported By:                Andrey Sofronov
Assigned To:                dvossel
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Project:                    Asterisk
Issue ID:                   14216
Category:                   Channels/chan_iax2
Reproducibility:            random
Severity:                   major
Priority:                   normal
Status:                     assigned
Asterisk Version:           1.4.22 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2009-01-12 10:02 CST
Last Modified:              2009-05-21 14:04 CDT
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Summary:                    Random audio dropouts when jitterbuffer = yes
Description: 
Sometimes (couple times per month) I get one-way audio issue on IAX2
trunks.
iax.conf looks like:
[general]
autokill = yes

bindaddr = xx.xx.xx.xx
disallow = all

jitterbuffer = yes
maxjitterbuffer = 1000
trunktimestamps = yes
transfer = yes

[guest]
type = user
context = guest

[peer1]
type = user
allow = speex
auth = rsa
inkeys = ....
context = peer1_incoming

[peer2]
type = peer
username = tminsk_speex
host = xx.xx.xx.xx
allow = speex
trunk = yes
qualify = yes
auth = rsa
outkey = ....

When the issue occurs, the calling party can hear the remote party, but
the remote party hears silence. The only way that helps is "unload module
chan_iax2.so && load module chan_iax2.so". Also disabling jitterbuffer and
"iax2 reload" helps. 

http://bugs.digium.com/view.php?id=14044 - that patch doesn't help me
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 (0105250) svnbot (reporter) - 2009-05-21 14:04
 https://issues.asterisk.org/view.php?id=14216#c105250 
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Repository: asterisk
Revision: 195991

U   branches/1.4/channels/chan_iax2.c

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r195991 | dvossel | 2009-05-21 14:04:57 -0500 (Thu, 21 May 2009) | 14
lines

Sign problem calculating timestamp for iax frame leads to no audio on the
receiving peer.

There are rare cases in which a frame's delivery timestamp is slightly
less than the iax2_pvt's offset.  This causes the pvt's timestamp to be a
small negative number, but since the timestamp value is unsigned it looks
like a huge positive number.  This patch checks for this negative case and
sets the ms to zero.  A similar check is already done right below this one
in the 'else' statement.

(closes issue https://issues.asterisk.org/view.php?id=15032)
Reported by: guillecabeza
Patches:
      chan_iax2.c.patch_timestamp uploaded by guillecabeza (license 380)
Tested by: guillecabeza

(closes issue https://issues.asterisk.org/view.php?id=14216)
Reported by: Andrey Sofronov


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http://svn.digium.com/view/asterisk?view=rev&revision=195991 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2009-05-21 14:04 svnbot         Checkin                                      
2009-05-21 14:04 svnbot         Note Added: 0105250                          
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