Hi Brian,
On Sunday 30 December 2007, Brian Pin wrote:
> Hi Laurent,
> Can I say that one URB corresponds to one frame only?
No, a frame can be split across multiple URBs.
> Because I saw the driver send out multiple URB at a time,
>
> for (i = 0; i < UVC_URBS; ++i) {
> if ((ret = usb_submit_urb(video->urb[i], GFP_KERNEL)) < 0) {
>
> and this goes to the following question that
> what if a URB is not capable of containing one frame...
The driver will copy data from multiple URBs to the video frame buffer.
Best regards,
Laurent Pinchart
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