From: H. Peter Anvin<address@hidden>
This brings a usb audio device to qemu. Output only, fixed at
16bit stereo @ 480000 Hz. Based on a patch from
H. Peter Anvin<address@hidden>
Usage: add '-device usb-audio' to your qemu command line.
Works sorta ok on a idle machine. Known issues:
* Is *very* sensitive to latencies: when the uhci emulation misses one
of the usb frame rate wakeups (1k/sec!) you'll loose/delay data from
the audio stream, resulting in dropouts.
* Also seems to not play very well with the usb tablet (and/or usb hub,
to be investigated). Best try this as the only device on a usb bus.
* Burns quite some CPU due to usb polling.
In short: It brings the qemu usb emulation to its limits. Enjoy!
Signed-off-by: Gerd Hoffmann<address@hidden>