[asterisk-bugs] [JIRA] (ASTERISK-23836) JACK_HOOK with more than 8Khz

[Dennis Guse (JIRA)]

Dennis Guse created ASTERISK-23836:
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             Summary: JACK_HOOK with more than 8Khz
                 Key: ASTERISK-23836
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-23836
             Project: Asterisk
          Issue Type: Improvement
      Security Level: None
          Components: Applications/app_jack
    Affects Versions: SVN
         Environment: Ubuntu 14.04 using 11.7 and trunk in combination with jackd and puredata.
            Reporter: Dennis Guse
            Severity: Minor
         Attachments: patch-app_jack.c

So far app_jack is limited to 8Khz only.
The following patch adds support for dynamic sampling rates using information provided by the channel.

Checked with Linphone on Ubuntu 14.04 64bit.

Limitations:
* Information, i.e. sampling rate, is taken from channel during initialization as audiohook does not provide this information then. Audiohook.internal_sampl_rate is set later, but no callback is called.

* Frame.datalen is computed using rate / 50 assuming a ptime of 20ms.
There is no internal API available to determine datalen for a SLINxx.

* Ringbuffer size is a DEFINE and thus must be quite big to be able to cope with 16Khz+

PS: This bug report is a duplicate of 20969
https://issues.asterisk.org/jira/browse/ASTERISK-20696?jql=text%20~%20%22app_jack%22



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