[asterisk-bugs] [JIRA] (ASTERISK-24006) app_waitforsilence logic error when used as WaitForNoise

[Rusty Newton (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-24006?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rusty Newton updated ASTERISK-24006:
------------------------------------

    Assignee: Rusty Newton  (was: M vd S)
      Status: Triage  (was: Waiting for Feedback)

> app_waitforsilence logic error when used as WaitForNoise
> --------------------------------------------------------
>
>                 Key: ASTERISK-24006
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-24006
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Applications/app_waitforsilence
>    Affects Versions: 1.8.13.1, 1.8.29.0
>         Environment: N/A (but observed on Debian 7.5)
>            Reporter: M vd S
>            Assignee: Rusty Newton
>            Severity: Trivial
>
> Actually 2 connected issues:
> 1) In do_waiting(), a condition in which no frames are received is treated as if it would trigger the dsp function. This is okay if the dsp tries to find silence, but if the dsp needs noise, you get the odd result that a muted channel is seen as noise.
> 2a) For some reason, when calling outbound using SIP, and invoking WaitForNoise() almost immediately (as to wait for the called party to start talking), no frames are received, nor is any audio recorded by the Monitor, while WaitForNoise() is running.
> [update 20140711]
> 2b) When calling outbound using SIP, and invoking Record(), a zero-sized file is created but no sound is recorded to it. Also, when invoked in such a way that it should end on silence, it hangs in Record() indefinitely. (to be precise, on "ms = ast_waitfor(chan, ms);" which is called with ms==-1)
> Issue 1 is resolved by changing this line:
>    dsptime = timereqd;
> to 
>    if ( wait_for_silence ) dsptime = timereqd; 
> Issue 2 is worked around by simply playing a short (1 ms) silent audio file before doing anything else.
> I personally don't need to have this fixed, but it might save other users a few hours of searching, since the combined effect of these issues is quite obscure.



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