Phil Quinton wrote: > "They are submitted to the endpoint's queue. The actual transmission > is managed by the controller's hardware and happens later, once per > microframe." > > Okay, but why are the 12 urbs (4 for sync) despatched one every > microframe ONLY on the initial start of a stream?
In the steady state, a new URB is submitted whenever a URB has been completed. Completion happens just after the packet was actually transmitted, so this behaviour proves that the actual transmission works correctly (once per microframe). > I'll just have to get my DIY device to drop or increase the buffer to > handle 12+ urbs. Your device never needs to handle more than one packet (per microframe). Regards, Clemens ------------------------------------------------------------------------------ _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
