[asterisk-bugs] [Asterisk 0018738]: [review][branch] DTMF is delayed through features.c

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=18738 
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Reported By:                oej
Assigned To:                
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Project:                    Asterisk
Issue ID:                   18738
Category:                   Core/General
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           1.4.39.1 
JIRA:                        
Regression:                 No 
Reviewboard Link:           https://reviewboard.asterisk.org/r/1092 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2011-02-03 02:51 CST
Last Modified:              2011-02-03 02:57 CST
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Summary:                    [review][branch] DTMF is delayed through features.c
Description: 
When a channel listens for DTMF in the core bridge, the outbound DTMF is
not sent until we have received DTMF_END. For a long DTMF, this is a
disaster. We send 4 seconds of DTMF to Asterisk, asterisk starts sending
after and the call is interrupted for a total of 8 secs.

With this change, the DTMF_BEGIN frame is inspected and checked. If it
matches a feature code, we wait for DTMF_END and activate the feature as
before. If it doesn't match a feature, the frame is forwarded along with
the DTMF_END without delay. By doing it this way, DTMF is not delayed.

I've also changed two DTMF relay events to actually use the same duration
as the incoming DTMF.

I have no experience of messing around with features.c and bridges, so
please review this carefully. It is proven to work both in a 1.6.0 version
and 1.4.
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 (0131431) oej (manager) - 2011-02-03 02:57
 https://issues.asterisk.org/view.php?id=18738#c131431 
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http://svn.digium.com/svn/asterisk/team/oej/pinesounds-dtmf-feature-delay-1.4

contains this patch. 

Issue History 
Date Modified    Username       Field                    Change               
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2011-02-03 02:57 oej            Note Added: 0131431                          
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