Hi all, I wrote some capture code and tested it out on Ubuntu 8.10 (kernel 2.6.27.11). My Dynex 1.3 MP camera supports memory mapping and works just fine on my Ubuntu box. However, I have cross-compiled the UVC driver for my Gumstix (the target platform for capture - kernel is 2.6.21) and though I was able to successfully install the driver, my capture code doesn't seem to work. I've traced the problem to to ioctl call with VIDIOC_QUERYBUF. On my box, that function call returns a buffer length of width * height * 2 (format is YUYV, so this is right). On my Gumstix, it returns width * height + 589 (the 589 is the same regardless of the frame size).
Is there any reason why this would be happening? I appear to be unfamilar with the behavior of VIDIOC_QUERYBUF, but it looks like it ought to be pretty straightforward. Oh, I should point out that calls to VIDIOCSPICT and VIDIOCGPICT on my Ubuntu box works just fine, but returns -1 for the Gumstix. This camera requires that I use some bizarre combinations of V4L1 and V4L2 code to access all of its functionality. I'm not sure what versions of the various V4L modules and camera drivers are. Thanks in advance. -Tom -- Tom Moore Member, Engineering Staff Lockheed Martin Advanced Technology Laboratories 3 Executive Campus, Suite 600 Cherry Hill, NJ 08002 Phone: 856-792-9750 E-mail: [email protected] _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
