[asterisk-bugs] [Asterisk 0016212]: [regression] Early audio message doesn't play over SIP

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
====================================================================== 
https://issues.asterisk.org/view.php?id=16212 
====================================================================== 
Reported By:                miki
Assigned To:                dvossel
====================================================================== 
Project:                    Asterisk
Issue ID:                   16212
Category:                   Channels/chan_sip/General
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     assigned
Asterisk Version:           SVN 
JIRA:                       SWP-381 
Regression:                 Yes 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases):  trunk 
SVN Revision (number only!): 226683 
Request Review:              
====================================================================== 
Date Submitted:             2009-11-10 01:02 CST
Last Modified:              2010-01-05 11:54 CST
====================================================================== 
Summary:                    [regression] Early audio message doesn't play over
SIP
Description: 
We use early audio messages to notify caller about reason why callee isn't
reachable. It has stopped working over SIP in the SVN trunk sometime
between rev 200287 and 226683. 183 Session Progress message isn't send back
to caller and audio channel isn't open when Playback function with noanswer
parameter is called.
Message is played without any problem even in rev 226683 if call is
answered. Warning message "file.c:746 ast_readaudio_callback: Failed to
write frame" does appear sometimes (not always). 

======================================================================
Relationships       ID      Summary
----------------------------------------------------------------------
related to          0015957 Automatic progress indication breaks so...
====================================================================== 

---------------------------------------------------------------------- 
 (0116073) miki (reporter) - 2010-01-05 11:54
 https://issues.asterisk.org/view.php?id=16212#c116073 
---------------------------------------------------------------------- 
Tilghman - no one has said Playback implicitly sent or should have sent
Progress. 

Issue results from introduction of premature media option in chan_sip and
that the premature media filter is disabled in older versions by default
for compatibility but is enabled by default in 1.6.2. Hence 1.6.2 behaves
differently because of the change. Explicit Progress must be added or
prematuremedia option value must be changed in order to script start
working properly again after upgrade.
Note: premature media filter was enabled by default in 1.6.0 and 1.6.1 too
just for about 1-1,5 hour ;-) It was disabled in 1.4 all time. 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2010-01-05 11:54 miki           Note Added: 0116073                          
======================================================================