Back on Monday 21 April 2008, Takashi Iwai was like: > At Sun, 20 Apr 2008 21:28:25 -0500, > > Reuben Martin wrote: > > Hello all, > > > > I have an AES32 sound card that I am trying to write a general control > > interface for using qt4. I'm wanting to register callbacks so that the > > interface will reflect changes made by other apps. Now I'm not entirely > > up to speed on the API, but from what I can gather, the callback can be > > registered to call a regular function, or to change a public class > > variable. > > > > Since I decided to use qt4, everything is in classes. Is there any way to > > have the callback trigger a public class function? I guess I don't > > understand why you would want to use a public variable instead. Wouldn't > > you have to set up a means within the class to continually pole the > > variable to see if it has been changed? Or can the option to call a > > regular function be used to call a public class function as well? > > Well, which callback do you have in your mind? A bit more > specificically please... Sorry about that. The callbacks I was referring to are mixer callbacks, specifically snd_mixer_set_callback and snd_mixer_set_callback_private. I wrote "public" in my original post, when I meant "private". And now that I'm looking at it I think I may have misunderstood what snd_mixer_set_callback_private was for. Anyway, I'm just wondering if it's possible (while maintaining sanity) to interface one of these mixer callbacks with a class public function. Or if there is a better means to get feedback when changes are made to one of the simple mixer elements. Thanks, -Reuben _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
