[Stk] crtsine.cpp gives RtApiAlsa: error starting callback thread!
Charlls Quarra
charlls_quarra@yahoo.com.ar
Fri, 10 Feb 2006 00:28:12 -0300 (ART)
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uh, i think i made i mistake;
i enabled all options during configuration, which probably means that the last one enabled was the overriding one (oss), i did something like
./configure --enable-jack --enable-alsa --enable-oss
i thought the 3 options were compatible on a single buy, but maybe one needs to build a separate stk library for each api?
"Gary P. Scavone" <gary@ccrma.Stanford.EDU> escribió: Hi Charlls,
It is odd that you are getting an ALSA error report if you did not
provide the -D__LINUX_ALSA__ preprocessor definition during
compilation. My guess wrt to the error below is the same issue I
reported yesterday ... please see the archives. To repeat:
In RtAudio, search for "pthread_attr_setschedpolicy(&attr,
SCHED_RR);" and change the SCHED_RR to SCHED_OTHER. Make sure you
are in the RtApiAlsa section of the code.
I don't know why this is a problem for some and not others but I will
likely make this change in the next release of RtAudio.
Also, you shouldn't get this error if you are using the Jack API.
And RtAudio should use the Jack API automatically if it is only
compiled with Jack support. In fact, even if there is multiple Linux
audio API support compiled in, Jack gets highest priority. So, if
RtAudio finds a running Jack server when it starts up, it uses that.
Regards,
--gary
On 9-Feb-06, at 9:45 PM, Charlls Quarra wrote:
>
> Hi,
>
> compiling the following example:
> http://ccrma.stanford.edu/software/stk/crealtime.html
>
> with
> g++ -D__LINUX_JACK__ crtsine.cpp -o crtsine -lpthread -ljack -
> lasound -lstk
>
> ah, btw, i created an ebuild script for stk-4.2.1 for gentooers, is
> in the revision step but can be fetched at:
> http://bugs.gentoo.org/show_bug.cgi?id=122321 (see attachment)
>
> when i run crtsine i get this error,
>
> RtApiAlsa: error starting callback thread!
>
> this error occurs at
> dac->setStreamCallback(&tick, (void *)&sine);
>
> any ideas what i'm doing wrong? jackd is running fine while i run
> the program
>
>
>
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<br> uh, i think i made i mistake;<br> <br> i enabled all options during configuration, which probably means that the last one enabled was the overriding one (oss), i did something like<br> <br> ./configure --enable-jack --enable-alsa --enable-oss<br> <br> i thought the 3 options were compatible on a single buy, but maybe one needs to build a separate stk library for each api?<br><br><b><i>"Gary P. Scavone" <gary@ccrma.Stanford.EDU></i></b> escribió:<blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"> Hi Charlls,<br><br>It is odd that you are getting an ALSA error report if you did not <br>provide the -D__LINUX_ALSA__ preprocessor definition during <br>compilation. My guess wrt to the error below is the same issue I <br>reported yesterday ... please see the archives. To repeat:<br><br>In RtAudio, search for "pthread_attr_setschedpolicy(&attr, <br>SCHED_RR);" and change the SCHED_RR to
SCHED_OTHER. Make sure you <br>are in the RtApiAlsa section of the code.<br><br>I don't know why this is a problem for some and not others but I will <br>likely make this change in the next release of RtAudio.<br><br>Also, you shouldn't get this error if you are using the Jack API. <br>And RtAudio should use the Jack API automatically if it is only <br>compiled with Jack support. In fact, even if there is multiple Linux <br>audio API support compiled in, Jack gets highest priority. So, if <br>RtAudio finds a running Jack server when it starts up, it uses that.<br><br>Regards,<br><br>--gary<br><br>On 9-Feb-06, at 9:45 PM, Charlls Quarra wrote:<br><br>><br>> Hi,<br>><br>> compiling the following example:<br>> http://ccrma.stanford.edu/software/stk/crealtime.html<br>><br>> with<br>> g++ -D__LINUX_JACK__ crtsine.cpp -o crtsine -lpthread -ljack - <br>> lasound -lstk<br>><br>> ah, btw, i created an ebuild script for stk-4.2.1 for gentooers, is
<br>> in the revision step but can be fetched at:<br>> http://bugs.gentoo.org/show_bug.cgi?id=122321 (see attachment)<br>><br>> when i run crtsine i get this error,<br>><br>> RtApiAlsa: error starting callback thread!<br>><br>> this error occurs at<br>> dac->setStreamCallback(&tick, (void *)&sine);<br>><br>> any ideas what i'm doing wrong? jackd is running fine while i run <br>> the program<br>><br>><br>><br>> 1GB gratis, Antivirus y Antispam<br>> Correo Yahoo!, el mejor correo web del mundo<br>> Abrí tu cuenta aquí<br><br>_______________________________________________<br>Stk mailing list<br>Stk@ccrma.stanford.edu<br>http://ccrma-mail.stanford.edu/mailman/listinfo/stk<br></blockquote><br><p>
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