On Thu, 2007-01-25 at 13:36 +0100, Takashi Iwai wrote: > At Sun, 21 Jan 2007 13:39:35 +0100, > Andreas Corneliussen wrote: > > > > Hi > > I've just build a mediacenter, and is about to construct an hifi > > amplifier for it. Therefore i would like to know a way to make alsa > > detect when nothing is playing at the output, and then run a external > > command. And detect when something has started playing at the output, > > and run an external command before any output is generatet. > > This I would like to do, because I then could make an interface between > > the amplifier and the computer to make sure that it does not use anymore > > standbypower than needed. > > It's an interesting question. Currently, there is no good framework > for such a functionality, so you need to build something new. > Fwiw, the Dynamic Audio Power Management code in ASoC (Alsa for SoC devices) does this very thing. Please feel free to have a look and take code if required. http://opensource.wolfsonmicro.com/~lg/asoc/ Liam ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
