On 07/20/2010 09:45 AM, Robin Gareus wrote:
On 07/20/2010 01:06 AM, Louigi Verona wrote:
Hey guys!
Some time ago I have asked someone to look into Kluppe and add a couple of
features.
My request was not ignored and Patrick Shirkey was kind enough to volunteer
to try to help.
However, he came upon a difficulty and that is - *how do you set up an
asynchronous timer in C?*
It depends what you need that timer for.
The timer is needed to countdown the period between stopping and
restarting the loop. The methods I have tried all halt the playback on a
single frame and the ui also becomes unresponsive while the timer is in
process.
All I would like to do is pass a zero byte to the audio signal handling
code while the timer is in progress. The rest of the interface should
stay active.
In gtk there's a g_timeout_add(). easy to use.
Will check that one. Might do the trick.
To writing your own:
`apropos pthread` and more specifically `man pthread_create`.
Otherwise will look into this.
usleep() sleeps at least, and select() sleeps at most a certain period
of time. http://freej.dyne.org/codedoc/fps_8cpp_source.html line 132ff
has examples of both.
Tried both of these options and they cause the app to pause with an
annoying buzz while the timer is in effect.
For [more] accurate timing: RTC or HPET. Example code comes
with the kernel:
linux-2.6/Documentation/rtc.txt
linux-2.6/Documentation/hpet.txt
There's a couple of other options fi. if you want to sync
hardware-devices using IRQs.. and the jack_process_callback is also very
good timer :)
Not required for this task.
It stopped right there. I was wondering if anyone could help us with that
matter?
Cheers!
--
Patrick Shirkey
Boost Hardware Ltd
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