[linux-dvb] How to determine the value of usb_data_stream_properties.u.buffersize.

Patrick Boettcher patrick.boettcher at desy.de
Fri Jul 27 12:16:56 CEST 2007


On Fri, 27 Jul 2007, lwtbenben wrote:

> >?2007-07-27,"Patrick Boettcher" <patrick.boettcher at desy.de> ??: On Fri, 27 
> >This field gives the size of the buffer to be allocated by the 
> >data-transfer part of dvb-usb per URB.
> >Depending on your USB-controller or its firmware this value can vary. You 
> >can try 4096 (and maybe 10 URBs) as a start and you will see what the 
> >device will give you (in fact when it decides to finish the transfer).
> 
> It is kind of you. And the same as my guess :-)
> And besides we should give a consider of our demodulator's parameters to identify this field.

What do you mean? Normally this field depends only on the USB-part of the 
Hardware (not on the demodulator).

Patrick.

--
  Mail: patrick.boettcher at desy.de
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