Re: [Alsa-user] usbaudio - Stream start causes multiple urbs to be sent rapidly to isosynchronous and sync endpoints

2015-09-14 Thread Clemens Ladisch
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?

Re: [Alsa-user] usbaudio - Stream start causes multiple urbs to be sent rapidly to isosynchronous and sync endpoints

2015-09-14 Thread Phil Quinton
"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? After they have been sent it