>> Shouldn't we add support for delay on the capture path instead? We could
>> use the same frame counter to report the delay and resync when the urb
>> is retired.
>
> Sure, it must be possible like that way.
> Wouldn't you like to volunteer? ;)

here's a suggestion. Since we don't submit multiple URBs as in the 
playback case, we can only track the delay using the frame counter for a 
single URB, and we reset the counters when the URB is retired.
Did a couple of tests, seems to work ok.
I couldn't figure out if the related patches are already in git, I 
didn't find them. Takashi, did you merge them already?
-Pierre