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

[Kevin Fleming]

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http://reviewboard.digium.com/r/196/
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Review request for Asterisk Developers.


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.

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.

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.


Diffs
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  /trunk/main/channel.c 182359 
  /trunk/main/features.c 182359 

Diff: http://reviewboard.digium.com/r/196/diff


Testing
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Compile testing only.


Thanks,

Kevin