Hi, some months ago I wrote an alsa driver for the Apple iSight audio unit. I released it with the name "lisight' and it's available here: "http://lisight.sourceforge.net";. It's both an ieee1394 driver and an alsa one. It uses ieee1394 framework to communicate with the device and it registers an alsa device to make isight microphone available to the system. Recently I was talking on the linux1394 mailing list about its submission to the mainline kernel but we are wondering if it's possible to register an alsa device from userspace. Actually it would be a better approach to make an userspace driver when dealing with removable devices like firewire or usb ones. When I started writing the lisight kernel module , I tried to figure out if there were a way to register an audio device from userspace... I had the possibility to interact with the ieee1394 framework through libraw1394 (that uses raw1394 kernel module to access the firewire bus from userspace) but I didn't found any documentation (nor references inside kernel sources) regarding an alsa userspace interface to implement device drivers. Is there any working or experimental one? ... If not, are you planning to export such an interface to let developers make userspace drivers to deal with removable audio devices without requiring applications to support jack or similar frameworks? Thanks Andrea Guzzo ps. Another interesting use of an hypothetical alsa userspace interface for device drivers implementation would be the possibility to implement virtual audio devices ....for example you could implement a transparent sound server that doesn't require applications to support it explicitly and to link specific libraries, but it would be simply accessed like any other alsa device and , with the use of substreams, it would allow multiple applications to access audio facilities.... but this is another story :P ------------------------------------------------------------------------- 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
