#3 audio-over-usb support (testing only)

[Hal Finkel]

I have started work on audio-over-usb support for the
usbvision driver. The attached patch should compile on
all systems, but will only "work" (if it even does
that) on 2.6.x with ALSA enabled. Most of the code is a
stripped down version of the ALSA usbaudio driver (pcm
capture only and no mixer). It should compile on 2.4.x
ALSA with only small modifications (but I lack a test
system for that). Unfortunately, it looks like my
WinTV USB model 602 only has 2 interface endpoints (it
would need more if it had audio in the manner specified
by the datasheet), so I cannot really test it (although
the existing driver identified it as NT1004).

This is for TESTING only. It probably does not even
work (you have been warned).

[Hal Finkel]

usb-over-audio patch (testing only)