Re: [PATCH 2/5] videodev.h: add PIX_FMT_FWHT for use with vicodec

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On 21/07/18 19:51, Tom aan de Wiel wrote:
> Hi!
> 
> As of now, the version of the document I have locally is pretty much identical to the one you already linked to.
> I haven't had the time to shape it into a more documentation kind of document instead of the report format it has now.
> However, the report does contain all details and therefore could suffice as documentation for the time being?
OK, then I'll ask Mauro to put up the document I have on linuxtv.org so I can refer to it.

Thanks!

	Hans

> 
> Tom
> 
> tor. 19. jul. 2018 kl. 17:52 skrev Hans Verkuil <hverkuil@xxxxxxxxx <mailto:hverkuil@xxxxxxxxx>>:
> 
>     On 07/19/2018 05:39 PM, Sakari Ailus wrote:
>     > On Thu, Jul 19, 2018 at 03:20:22PM +0200, Hans Verkuil wrote:
>     >> On 07/19/18 15:15, sakari.ailus@xxxxxx <mailto:sakari.ailus@xxxxxx> wrote:
>     >>> On Thu, Jul 19, 2018 at 02:13:50PM +0200, Hans Verkuil wrote:
>     >>>> From: Hans Verkuil <hansverk@xxxxxxxxx <mailto:hansverk@xxxxxxxxx>>
>     >>>>
>     >>>> Add a new pixelformat for the vicodec software codec using the
>     >>>> Fast Walsh Hadamard Transform.
>     >>>>
>     >>>> Signed-off-by: Hans Verkuil <hansverk@xxxxxxxxx <mailto:hansverk@xxxxxxxxx>>
>     >>>
>     >>> Could you add documentation for this format, please?
>     >>>
>     >>
>     >> ??? It's part of the patch:
>     >>
>     >> diff --git a/Documentation/media/uapi/v4l/pixfmt-compressed.rst b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
>     >> index abec03937bb3..e5419f046b59 100644
>     >> --- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst
>     >> +++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
>     >> @@ -95,3 +95,10 @@ Compressed Formats
>     >>        - ``V4L2_PIX_FMT_HEVC``
>     >>        - 'HEVC'
>     >>        - HEVC/H.265 video elementary stream.
>     >> +    * .. _V4L2-PIX-FMT-FWHT:
>     >> +
>     >> +      - ``V4L2_PIX_FMT_FWHT``
>     >> +      - 'FWHT'
>     >> +      - Video elementary stream using a codec based on the Fast Walsh Hadamard
>     >> +        Transform. This codec is implemented by the vicodec ('Virtual Codec')
>     >> +    driver.
>     >>
>     >> Since the whole codec is implemented in the vicodec source I didn't think it
>     >> necessary to say more about it.
>     >
>     > Oh, well. The source is there but user space developers shouldn't need to
>     > read it. OTOH it might be that they're also not the primary audience for
>     > this driver either. If there's a Wikipedia article you could refer to or
>     > such that'd be fine IMO, too.
>     >
>     > Up to you.
>     >
> 
>     Tom,
> 
>     Do you have a newer version of your document? If not, can I refer to the version
>     I have? If it can be put up at the linuxtv.org <http://linuxtv.org> website, then that takes care of
>     the documentation.
> 
>     Regards,
> 
>             Hans
> 




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