On 9 Oct 2002, Ronald Bultje wrote: > On Wed, 2002-10-09 at 17:08, Miah Gregory wrote: > > Any thoughts on whether any jpeg formats should be added to the list of > > acceptable formats? > The zoran card simply lists MJPEG as one of the allowed formats, > V4L2_PIX_FMT_MJPEG (fourcc 'MJPG'). Shouldn't these things do that too? > I mean, come on, JPEG decompression in the kernel... That's userspace > stuff, really... Maybe you want to add another one, 'JPEG' > V4L2_PIX_FMT_JPEG, if it's not YUY2 MJPEG. Yes exactly; it's userspace stuff, and has no place in the kernel. > > The reason I ask is that it seems a little over the top to include jpeg > > decompression within a kernel module, but without that, many userspace > > applications won't be able to use the data. > If there's that many cards that do this, simply adapt the applications > to decode V4L2_PIX_FMT_(M)JPEG jpeg data, the authors will thankfully > accept such patches. Not so much cards, as usb cameras. > JPEG decoding is not something Alan will want to see in the kernel tree. > If I recall correctly, he even removed colorspace conversion code from > the Philips webcam driver. Interesting, although I guess that makes a lot of sense. I'd like to see the spca50x driver make it into the kernel, but there's a fair amount of work that needs done before that will become a possibility. Is the v4l2 specification available online anywhere? Thanks. -- Miah Gregory
