Re: [Linux-uvc-devel] V4L1 backwards compatibility

[Mikael N. <mi...@na...>]

If I understand the kernel API correctly, something like this patch
*should* bring V4L1 compatibility to the uvc driver. However, I don't
get a picture in gnomemeeting (old version, not ekiga), and not in the
proprietary app I talked about.

I suppose there might be a reson why this cannot work. Can anyone
enlighten me?



Index: uvcvideo.c
===================================================================
--- uvcvideo.c  (revision 17)
+++ uvcvideo.c  (working copy)
@@ -2139,7 +2139,8 @@

        default:
                uvc_trace(UVC_TRACE_IOCTL, "Unknown ioctl 0x%08x\n", cmd);
-               return -ENOIOCTLCMD;
+               return v4l_compat_translate_ioctl(inode,file,cmd,arg,
+                                                 uvc_v4l2_do_ioctl);
        }

        return 0;


/Mikael

lör 2006-02-04 klockan 23:23 +0100 skrev Mikael Nilsson:
> lör 2006-02-04 klockan 23:05 +0100 skrev michel Xhaard:
> > Mikael
> > This driver design is v4l2 only . The v4L1 compat only works for old driver to 
> > the new interface, but a young driver, like uvcvideo works directly on v4l2.
> 
> Hmmm? Are you sure? This is the text in v4l1-compat.c:
> 
>  *      Video for Linux Two
>  *      Backward Compatibility Layer
>  *
>  *      Support subroutines for providing V4L2 drivers with backward
>  *      compatibility with applications using the old API.
>  *
> 
> I read this as support for *new* drivers and *old* applications, not the
> other way around. But then again, I'm no expert...
> 
> /Mikael
-- 
Plus ça change, plus c'est la même chose