linux-kernel - Re: [PATCH 2/2] [media] v4l: Add 10-bits per channel YUV pixel formats

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Message-ID: <CAPj87rPKo1OHnRK=fhU9Se3itbrySr=fQOOtgyYth2ciQ__CGQ@mail.gmail.com>
Date:   Tue, 3 Jan 2017 10:49:32 +0000
From:   Daniel Stone <daniel@...ishbar.org>
To:     ayaka <ayaka@...lik.info>
Cc:     Sakari Ailus <sakari.ailus@....fi>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        "Vetter, Daniel" <daniel.vetter@...el.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Sean Paul <seanpaul@...omium.org>,
        David Airlie <airlied@...ux.ie>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        randy.li@...k-chips.com, mchehab@...nel.org,
        linux-media@...r.kernel.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: Re: [PATCH 2/2] [media] v4l: Add 10-bits per channel YUV pixel formats

Hi all,

On 2 January 2017 at 13:03, ayaka <ayaka@...lik.info> wrote:
> On 01/02/2017 07:07 PM, Sakari Ailus wrote:
>> On Mon, Jan 02, 2017 at 06:53:16PM +0800, ayaka wrote:
>>> On 01/02/2017 05:10 PM, Sakari Ailus wrote:
>>>> If the format resembles the existing formats but on a different bit
>>>> depth,
>>>> it should be named in similar fashion.
>>>
>>> Do you mean it would be better if it is called as NV12_10?
>>
>> If it otherwise resembles NV12 but just has 10 bits per pixel, I think
>> NV12_10 is a good name for it.
>
> The main reason I don't like it is that there is a various of software
> having used the P010 for this kind of pixel format. It would leadi a
> conflict between them(and I never saw it is used as NV12_10), as the P010 is
> more common to be used.

Indeed; GStreamer, FFmpeg and Microsoft all call this P010:
https://msdn.microsoft.com/en-us/library/windows/desktop/bb970578(v=vs.85).aspx

fourcc.org is supposed to reflect Microsoft's registry, but seems to
not be actively maintained anymore.

Cheers,
Daniel