Re: Zero Packets in Isochronous Transfer Reception

2018-07-17 Thread Alan Stern
On Sat, 14 Jul 2018, R0b0t1 wrote: > I implemented your recommendation and I still have issues receiving > multiple isochronous packets as part of one scheduled transfer. The > maximum is now 5 or 6 in a row, as opposed to 2 or 3. Any more and > there is stuttering. It does not matter how deep I m

Re: Zero Packets in Isochronous Transfer Reception

2018-07-14 Thread R0b0t1
On Tue, Jul 10, 2018 at 9:23 AM, Alan Stern wrote: > On Mon, 9 Jul 2018, R0b0t1 wrote: > >> >> Is anyone able to comment on this in more detail? I thought it was >> supposed to be reported if a transfer did not arrive in time. > > It depends on what you mean by "arrive in time". If driver on the

Re: Zero Packets in Isochronous Transfer Reception

2018-07-10 Thread Alan Stern
On Mon, 9 Jul 2018, R0b0t1 wrote: > > As far as I can tell, all the transfers did complete properly. I > > didn't find any where the completion line contained an error code. > > > > Is anyone able to comment on this in more detail? I thought it was > supposed to be reported if a transfer did not

Re: Zero Packets in Isochronous Transfer Reception

2018-07-09 Thread R0b0t1
On Fri, Jul 6, 2018 at 12:36 PM, Alan Stern wrote: > On Fri, 6 Jul 2018, R0b0t1 wrote: >> >> This message was resent. The list has been eating my messages. It >> seems like no attachments besides text/plain are accepted, which is >> unfortunate because it means I can not include a full log. Log at

Re: Zero Packets in Isochronous Transfer Reception

2018-07-06 Thread Alan Stern
On Fri, 6 Jul 2018, R0b0t1 wrote: > On Thu, Jul 5, 2018 at 9:27 AM, Alan Stern wrote: > > On Wed, 4 Jul 2018, R0b0t1 wrote: > > > >> On Sun, Jul 1, 2018 at 9:12 AM, Alan Stern > >> wrote: > >> > On Sat, 30 Jun 2018, R0b0t1 wrote: > >> > > >> >> The problem seems more noticeable when using the P

Re: Zero Packets in Isochronous Transfer Reception

2018-07-05 Thread Alan Stern
On Wed, 4 Jul 2018, R0b0t1 wrote: > On Sun, Jul 1, 2018 at 9:12 AM, Alan Stern wrote: > > On Sat, 30 Jun 2018, R0b0t1 wrote: > > > >> The problem seems more noticeable when using the Python libusb > >> bindings but it still exists when using libusb directly. Can anyone > >> suggest what to look i

Re: Zero Packets in Isochronous Transfer Reception

2018-07-04 Thread R0b0t1
On Sun, Jul 1, 2018 at 9:12 AM, Alan Stern wrote: > On Sat, 30 Jun 2018, R0b0t1 wrote: > >> The problem seems more noticeable when using the Python libusb >> bindings but it still exists when using libusb directly. Can anyone >> suggest what to look into? > > Have you tried using usbmon to capture

Re: Zero Packets in Isochronous Transfer Reception

2018-07-01 Thread Alan Stern
On Sat, 30 Jun 2018, R0b0t1 wrote: > Hello, > > My code is a userspace application using libusb for now, but this > seems the best place to ask. > > I repurposed some USB audio class device code. At this point I've only > changed the descriptor to report as vendor class so nothing else grabs > t

Zero Packets in Isochronous Transfer Reception

2018-06-30 Thread R0b0t1
Hello, My code is a userspace application using libusb for now, but this seems the best place to ask. I repurposed some USB audio class device code. At this point I've only changed the descriptor to report as vendor class so nothing else grabs the device. I can receive and play PCM audio from the