Hi Ezequiel, On Thursday 07 June 2012 15:26:04 Ezequiel Garcia wrote: > Hi all, > > (I hope this is a genuine question, and I'm not avoiding my own homework > here.) > > I'm trying to support the audio part of the stk1160 usb bridge (similar to > em28xx). Currently, the snd-usb-audio module is being loaded when I > physically plug my device, but I can't seem to capture any sound with vlc. > > I still have to research and work a lot to understand the connection between > my device and alsa, and altough I could write a working module similar to > em28xx-alsa.ko, I still can't figure out why do I need to write one in the > first place. > > Why is this module suffficient for gspca microphone devices (gspca, to name > one) and why is a new alsa driver needed for em28xx (or stk1160)? Some devices expose audio functionality by implementing the UAC (USB Audio Class) specification. The snd-usb-audio module is all you should need for those devices. Other vendors support audio by using their own proprietary protocol. In those cases you will need a device-specific kernel module. -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
