linux-kernel - RE: [PATCH] media: v4l2-ctrl: Add main 10 still picture profile for hevc

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Date:   Fri, 26 Aug 2022 06:34:06 +0000
From:   "Dikshita Agarwal (QUIC)" <quic_dikshita@...cinc.com>
To:     Hans Verkuil <hverkuil-cisco@...all.nl>,
        "Dikshita Agarwal (QUIC)" <quic_dikshita@...cinc.com>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "ezequiel@...labora.com" <ezequiel@...labora.com>
CC:     "stanimir.varbanov@...aro.org" <stanimir.varbanov@...aro.org>,
        "linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
        "Vikash Garodia (QUIC)" <quic_vgarodia@...cinc.com>,
        "Maheshwar Ajja (QUIC)" <quic_majja@...cinc.com>,
        quic_jdas <quic_jdas@...cinc.com>
Subject: RE: [PATCH] media: v4l2-ctrl: Add main 10 still picture profile for
 hevc

Hi Hans,

-----Original Message-----
From: Hans Verkuil <hverkuil-cisco@...all.nl> 
Sent: Wednesday, August 24, 2022 5:36 PM
To: Dikshita Agarwal (QUIC) <quic_dikshita@...cinc.com>; linux-media@...r.kernel.org; linux-kernel@...r.kernel.org; ezequiel@...labora.com
Cc: stanimir.varbanov@...aro.org; linux-arm-msm@...r.kernel.org; Vikash Garodia (QUIC) <quic_vgarodia@...cinc.com>; Maheshwar Ajja (QUIC) <quic_majja@...cinc.com>; quic_jdas <quic_jdas@...cinc.com>
Subject: Re: [PATCH] media: v4l2-ctrl: Add main 10 still picture profile for hevc

Hi Dikshita,

On 23/08/2022 09:26, Dikshita Agarwal wrote:
> Add main 10 still picture profile for HEVC encoder.

Hmm, is this the same as the "Main 4:4:4 Still Picture" profile mentioned here:

https://en.wikipedia.org/wiki/High_Efficiency_Video_Coding#Version_2_profiles

If not, where it is defined? I would also prefer to have this patch merged together with a driver that uses it.

It is different and definition can be found in Latest HEVC spec, Annex A, A.3.3 Main 10 and Main 10 Still Picture profiles.
https://www.itu.int/rec/dologin_pub.asp?lang=s&id=T-REC-H.265-201906-S!!PDF-E&type=items

Thanks,
Dikshita

Regards,

	Hans

> 
> Signed-off-by: Dikshita Agarwal <quic_dikshita@...cinc.com>
> ---
>  Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst | 2 ++
>  include/uapi/linux/v4l2-controls.h                        | 1 +
>  2 files changed, 3 insertions(+)
> 
> diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst 
> b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> index 2a165ae..5b2da84 100644
> --- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> @@ -2424,6 +2424,8 @@ enum v4l2_mpeg_video_hevc_profile -
>        - Main still picture profile.
>      * - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_10``
>        - Main 10 profile.
> +    * - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_10_STILL_PICTURE``
> +      - Main 10 still picture profile.
>  
>  .. raw:: latex
>  
> diff --git a/include/uapi/linux/v4l2-controls.h 
> b/include/uapi/linux/v4l2-controls.h
> index 5f46bf4..1159337 100644
> --- a/include/uapi/linux/v4l2-controls.h
> +++ b/include/uapi/linux/v4l2-controls.h
> @@ -743,6 +743,7 @@ enum v4l2_mpeg_video_hevc_profile {
>  	V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN = 0,
>  	V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_STILL_PICTURE = 1,
>  	V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_10 = 2,
> +	V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_10_STILL_PICTURE = 3,
>  };
>  #define V4L2_CID_MPEG_VIDEO_HEVC_LEVEL		(V4L2_CID_CODEC_BASE + 616)
>  enum v4l2_mpeg_video_hevc_level {