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    SubjectRe: Linux 2.6.9-ac3
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    On Fri, 2004-10-22 at 14:34 +0200, Xavier Bestel wrote:
    > Luc Saillard <luc@saillard.org> wrote:
    > > On Fri, Oct 22, 2004 at 10:13:35AM +0200, Luca Risolia wrote:
    > > > > o Restore PWC driver (Luc Saillard)
    > > >
    > > > This driver does decompression in kernel space, which is not
    > > > allowed. That part has to be removed from the driver before
    > > > asking for the inclusion in the mainline kernel.
    > >
    > > I know this problem, but without a user API like ALSA, each driver need to
    > > implement the decompression module. When the driver will support v4l2, we can
    > > return the compressed stream to the user land. I want a v4l3, which is
    > > designed as ALSA does for soundcard, with a API for userland and kernelland.
    >
    > Why not use gstreamer as a userland API ? You deliver compressed video
    > through v4l2, then write a decompression plugin specific to your
    > chipset.

    gstreamer might work for your average desktop application, and a
    gstreamer plugin for this might be very handy indeed. However, there are
    setups where gstreamer is just too bloated, and there's no way I could
    squeeze it on the box's filesystem (think in the 8-16Mb range for
    available space).

    A small decoding library and a gstreamer plugin on top of that would be
    the best solution, I think.

    However, until there's such a thing, Luc's driver works fine for me and
    my employer.

    (Also, keep in mind that PWC thingies are pretty common in some circles,
    and owners of these devices would like to see a working driver now.
    Instead of a perfect one a year from now. Therefore, the driver staging
    in the -ac tree is a very good thing, imho.)

    --
    Gergely Nagy

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