Re: [PATCH] media: v4l2-ctrl: Add main 10 still picture profile for hevc
From: Hans Verkuil
Date: Thu Nov 24 2022 - 05:57:08 EST
On 26/08/2022 08:34, Dikshita Agarwal (QUIC) wrote:
> Hi Hans,
>
> -----Original Message-----
> From: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
> Sent: Wednesday, August 24, 2022 5:36 PM
> To: Dikshita Agarwal (QUIC) <quic_dikshita@xxxxxxxxxxx>; linux-media@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; ezequiel@xxxxxxxxxxxxx
> Cc: stanimir.varbanov@xxxxxxxxxx; linux-arm-msm@xxxxxxxxxxxxxxx; Vikash Garodia (QUIC) <quic_vgarodia@xxxxxxxxxxx>; Maheshwar Ajja (QUIC) <quic_majja@xxxxxxxxxxx>; quic_jdas <quic_jdas@xxxxxxxxxxx>
> 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
It will be useful to have a reference to that in the documentation.
Also note that I can't merge this without a driver that uses it!
Regards,
Hans
>
> Thanks,
> Dikshita
>
> Regards,
>
> Hans
>
>>
>> Signed-off-by: Dikshita Agarwal <quic_dikshita@xxxxxxxxxxx>
>> ---
>> 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 {