31 Mar
2004
31 Mar
'04
1:50 p.m.
Arve Knudsen <aknuds-1(a)broadpark.no> writes:
The thing is I don't have complete control over
the audio thread, a
user defined callback is involved. In working on the ALSA
implementation of the PortAudio library there has been a request for
realtime scheduling of the audio thread, similar to the older OSS
implementation. The OSS implementation starts both a watchdog and a
canary thread; the watchdog will kill the audio thread (with SIGKILL)
if it doesn't respond within 3-second intervals, or lower it's
priority if the (normal priority) canary thread is starved.
You can do something like this...
int oldtype;
pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldtype);
/* invoke the callback */
framesProcessed = PaUtil_EndBufferProcessing( &stream->bufferProcessor,
&callbackResult );
/* restore original canceltype setting */
pthread_setcanceltype(oldtype, NULL);
--
joq