[asterisk-dev] [Code Review] Improve behavior of ast_answer() to not lose incoming frames

[Russell Bryant]

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Ship it!



/trunk/include/asterisk/channel.h
<http://reviewboard.digium.com/r/196/#comment1310>

    It may also be worth noting that the channel does get locked internally to the function.  This is very useful to know when dealing with locking order issues.



/trunk/main/channel.c
<http://reviewboard.digium.com/r/196/#comment1311>

    superfluous semicolon



/trunk/main/features.c
<http://reviewboard.digium.com/r/196/#comment1312>

    trailing space


- Russell


On 2009-03-17 06:42:02, Kevin Fleming wrote:
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> (Updated 2009-03-17 06:42:02)
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> Review request for Asterisk Developers.
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> Summary
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> ast_answer(), when supplied a delay before returning to the caller, use ast_safe_sleep() to implement the delay. Unfortunately during this time any incoming frames are discarded, which is problematic for T.38 re-INVITES and other sorts of channel operations.
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> When a delay is not passed to ast_answer(), it still delays for up to 500 milliseconds, waiting for media to arrive. Again, though, it discards any control frames, or non-voice media frames.
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> This patch rectifies this situation, by storing all incoming frames during the delay period on a list, and then requeuing them onto the channel before returning to the caller.
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> 
> Diffs
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>   /trunk/include/asterisk/channel.h 182520 
>   /trunk/main/channel.c 182520 
>   /trunk/main/features.c 182520 
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> Diff: http://reviewboard.digium.com/r/196/diff
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> Testing
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> Compile testing only.
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> Thanks,
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> Kevin
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>