[asterisk-dev] [Code Review] 3618: App_jack: more than 8Khz

[Mark Michelson]

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As opticron pointed out before, the chan_sip changes should be removed from the review.

- Mark Michelson


On June 14, 2014, 10:12 p.m., Dennis Guse wrote:
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> (Updated June 14, 2014, 10:12 p.m.)
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> 
> Review request for Asterisk Developers.
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> Bugs: ASTERISK-20696 and ASTERISK-23836
>     https://issues.asterisk.org/jira/browse/ASTERISK-20696
>     https://issues.asterisk.org/jira/browse/ASTERISK-23836
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> Repository: Asterisk
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> Description
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> Target: app_jack.c
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> Enables the jack-audiohook to cope with dynamic sampling rates from and to Asterisk.
> Information from channel is taken to derive the channel's sampling rate, suiting SLINxx format and frame->datalen.
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> Limitations:
> * Required information 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 available to inform app_jack.
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> * Frame.datalen is computed using "rate / 50" assuming a ptime of 20ms.
> There is no internal API available to determine datalen for a SLINxx.
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> * Ringbuffer size is a DEFINE and thus must be quite big to be able to cope with 16Khz+
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> Diffs
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>   /trunk/apps/app_jack.c 415578 
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> Diff: https://reviewboard.asterisk.org/r/3618/diff/
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> Testing
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> Checked with jackd and puredata using G.711 and G.722 on Ubuntu 14.0.4 64bit using Linphone and Ekiga.
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> Thanks,
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> Dennis Guse
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