Merged revisions 62789 via svnmerge from

Merged revisions 62789 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.4

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r62789 | russell | 2007-05-02 17:59:09 -0500 (Wed, 02 May 2007) | 20 lines

Merge changes from team/russell/inband_dtmf ...

Fix some issues related to generating inband DTMF.  There are two changes here:

1)   The list of DTMF tones in the senddigit_begin() function explicitly
   specified 100ms of the tone followed by 100ms of silence.  This really
   broke things with the way that Asterisk now wants complete control
   over when the digit begins and ends.  So, regardless of what Asterisk
   really wanted to do, this was going to play out the tone at the length it
   wanted to.  This caused various problems like DTMF translation to inband to
   be extremely unreliable.
     The list of tones has been changed so that the correct DTMF tone is played
   indefinitely until Asterisk tells it to stop.

2) ast_write() had to be modified to let a DTMF_END frame get processed even
   when a generator is present.  This is how the tone will finally get stopped.

(issues #8944, #9250, #9348, maybe others.  Thanks to mdu113 from #8944 for
 the testing and feedback!)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@62791 65c4cc65-6c06-0410-ace0-fbb531ad65f3