Re: [LAU] Estimating JACK latency

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To: <lists@...>
Cc: LAU <Linux-audio-user@...>
Date: Monday, April 16, 2012 - 9:38 pm

On Mon, Apr 16, 2012 at 5:21 PM, S. Massy wrote:

>> you don't. you use the part of the API that is specifically designed

you're using an old version of JACK. the output of jack_lsp -l is a
*range* of values for each port:

audacious-jack_32120_101:out_0
port latency = 0 frames
port playback latency = [ 1024 1024 ] frames
port capture latency = [ 0 0 ] frames

> Is that value an absolute or relative to the nominal latency?

its neither. you must read the docs and understand them to understand
what is it telling you. the basic idea is to provide a way to be able
to answer one or both of the two questions:

* how long has it been since the data i'm handling in a process()
callback arrived at the edge of the JACK graph?

* how long will it be until the data i'm handing in a process
callback() will arrive at the edge of the JACK graph?
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Messages in current thread:
[LAU] Estimating JACK latency, S. Massy, (Mon Apr 16, 7:33 pm)
Re: [LAU] Estimating JACK latency, Paul Davis, (Mon Apr 16, 8:54 pm)
Re: [LAU] Estimating JACK latency, Joel Roth, (Sun May 13, 12:21 pm)
Re: [LAU] Estimating JACK latency, Paul Davis, (Sun May 13, 12:46 pm)
Re: [LAU] Estimating JACK latency, S. Massy, (Mon Apr 16, 9:24 pm)
Re: [LAU] Estimating JACK latency, Fons Adriaensen, (Tue Apr 17, 5:10 pm)
Re: [LAU] Estimating JACK latency, Joel Roth, (Thu May 3, 2:52 am)
Re: [LAU] Estimating JACK latency, Fons Adriaensen, (Thu May 3, 10:15 am)
Re: [LAU] Estimating JACK latency, S. Massy, (Thu May 3, 4:54 pm)
Re: [LAU] Estimating JACK latency, Joel Roth, (Thu May 3, 8:36 pm)
Re: [LAU] Estimating JACK latency, Joel Roth, (Thu May 3, 2:27 am)
Re: [LAU] Estimating JACK latency, Robin Gareus, (Thu May 3, 8:21 am)
Re: [LAU] Estimating JACK latency, Paul Davis, (Mon Apr 16, 9:38 pm)