[asterisk-dev] [Code Review] 3563: TALK_DETECT: A channel function that raises AMI/ARI events when talking is detected

[Matt Jordan]

> On May 29, 2014, 8:53 a.m., Joshua Colp wrote:
> > /branches/12/funcs/func_talkdetect.c, line 260
> > <https://reviewboard.asterisk.org/r/3563/diff/1/?file=58936#file58936line260>
> >
> >     Is it possible for another thread to jump in here and do the same thing?

Certainly for another channel. When I wrote this, I wasn't thinking that another thread could do this for the same channel - however, that's clearly possible. I could have AMI perform a SetVar on a channel at the same time as dialplan (or ARI) invoked the function.

Unlocking it here was merely a 'don't hold the lock if you don't need it' thought - I'll just hold the lock during the entire operation instead.


- Matt


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On May 24, 2014, 11:47 p.m., Matt Jordan wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviewboard.asterisk.org/r/3563/
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> 
> (Updated May 24, 2014, 11:47 p.m.)
> 
> 
> Review request for Asterisk Developers.
> 
> 
> Bugs: ASTERISK-23786
>     https://issues.asterisk.org/jira/browse/ASTERISK-23786
> 
> 
> Repository: Asterisk
> 
> 
> Description
> -------
> 
> This patch adds a new channel function TALK_DETECT that, when set on a channel, causes events indicating the start/stop of talking on a channel to be emitted to both AMI and ARI clients. Why a channel function? Because both ARI and AMI can set it on the channel, making it (slightly) more useful than existing speech/silence detection dialplan applications.
> 
> The function allows setting both the silence threshold (the length of silence after which we decide no one is talking) as well as the talking threshold (the amount of energy that counts as talking):
> 
> same => n,Set(TALK_DETECT(set)=2500,256)
> 
> Parameters can be updated on a channel:
> 
> same => n,Set(TALK_DETECT(set)=)       ; Enable talk detection
> same => n,Set(TALK_DETECT(set)=,128)   ; Set the talking threshold on the existing talk detection to 128
> 
> And talk detection can be removed:
> 
> same => n,Set(TALK_DETECT(remove)=)
> 
> The events raised by the function use a nomenclature similar to existing AMI/ARI events.
> For AMI: ChannelTalkingStart/ChannelTalkingStop
> For ARI: ChannelTalkingStarted/ChannelTalkingFinished
> 
> Both 'end' events include the duration of talking that was detected (in milliseconds).
> 
> 
> Diffs
> -----
> 
>   /branches/12/rest-api/api-docs/events.json 414470 
>   /branches/12/res/ari/ari_model_validators.c 414470 
>   /branches/12/res/ari/ari_model_validators.h 414470 
>   /branches/12/main/stasis_channels.c 414470 
>   /branches/12/main/audiohook.c 414470 
>   /branches/12/include/asterisk/stasis_channels.h 414470 
>   /branches/12/funcs/func_talkdetect.c PRE-CREATION 
> 
> Diff: https://reviewboard.asterisk.org/r/3563/diff/
> 
> 
> Testing
> -------
> 
> See review https://reviewboard.asterisk.org/r/3564
> 
> 
> Thanks,
> 
> Matt Jordan
> 
>

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