Carlo Florendo wrote: > (1) I've written a command line MIDI sequencer for lightweight systems and > am successful in making it work using the ALSA queue API. However, one > drawback of the API is its lack of callback functions. I wish to be able > to track events as they are drained by the queue. > > (2) I know and have successfully worked on a work around whereby the > application itself subscribes to the output port so as to see events as > they are played. You could also send special user-defined events just to yourself, but the principle is the same. > However, I wish to be able to make the sequencer or player work without the > use of the ALSA queue nor the workaround in (2). Why? > How could I get the app to <u|nano>sleep() in the most accurate way in > userspace without using the ALSA queue nor the extra subscription to an > output port? On newer kernels, you could try POSIX interval timers. > Or, is there a drain or output routine that supports callbacks? Why can't you simply call the callback when some event has been received? Regards, Clemens _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
