[LAD] Handling multiple audio streams [was: Adding a c timer to Kluppe]

[Louigi Verona]

Hey Patrick!

Maybe I should once more make an attempt to contact the original kluppe
developer. Maybe he'll find some time to reply.

Louigi.

On Thu, Apr 29, 2010 at 3:10 AM, Patrick Shirkey <pshirkey at boosthardware.com
> wrote:

> Hi,
>
> Just in case anyone has had some time to ponder this problem and has
> forgotten to respond or missed the original request for assistance.
>
> I would like to add a timer function to kluppe so that I can add a timed
> delay to the playback start for an individual loop.
>
> There are a couple of problems with the current implementation.
>
> 1: There is an annoying buzz when the loop is paused on three out of four
> pause scenarios. This is probably related to the buffer being trapped on
> pause for some reason.
> 2: With the current implementation using select(), the pause affects all
> running loops.
>
> I tried to work asynchronously with signal and alarm() but that was
> suggested as the wrong method.
>
> Now I am out of my depth as I am not sure how to create an asynchronous
> timer in c that will apply to the kluppe system. For example in some other
> languages there are timers and example code already written for this problem
> which makes it a fairly simple procedure to implement. Perhaps there is also
> something fundamental with the kluppe code that makes this problem even more
> difficult. If someone has a suggestion for the correct way to handle this
> problem I am more than happy to code it up and learn something new but I am
> aware that if I have to figure this one out by myself it's gonna take some
> time.
>
> The current test code is here:
> http://djcj.org/code/kluppe-0.6.14-playbackdelay.tar.bz2
>
> The core code can be found at src/common/looperdata.c:1342
>
> To enable the timed playback pause you need to adjust the bottom right
> spinbox in the spinbox grid panel for a specific loop.
>
>
>
>
> Cheers.
>
>
>
> Patrick Shirkey
> Boost Hardware Ltd
>
>
> _______________________________________________
> Linux-audio-dev mailing list
> Linux-audio-dev at lists.linuxaudio.org
> http://lists.linuxaudio.org/listinfo/linux-audio-dev
>
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