[Linux-kernel-mentees] [PATCH 1/2] v4l2-core: Add new metadata format
Hans Verkuil
hverkuil at xs4all.nl
Thu Oct 3 07:23:12 UTC 2019
On 10/3/19 9:18 AM, Vandana BN wrote:
> Add new metadata format to support metadata output in vivid.
>
> Signed-off-by: Vandana BN <bnvandana at gmail.com>
> ---
> drivers/media/v4l2-core/v4l2-ioctl.c | 1 +
> include/uapi/linux/videodev2.h | 1 +
> 2 files changed, 2 insertions(+)
>
> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
> index 20b3107dd4e8..34c1a2bd7f28 100644
> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> @@ -1340,6 +1340,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
> case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break;
> case V4L2_META_FMT_UVC: descr = "UVC Payload Header Metadata"; break;
> case V4L2_META_FMT_D4XX: descr = "Intel D4xx UVC Metadata"; break;
> + case V4L2_META_FMT_VIVID: descr = "Vivid Output Metadata"; break;
>
> default:
> /* Compressed formats */
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index 530638dffd93..a32335fcd064 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -755,6 +755,7 @@ struct v4l2_pix_format {
> #define V4L2_META_FMT_VSP1_HGT v4l2_fourcc('V', 'S', 'P', 'T') /* R-Car VSP1 2-D Histogram */
> #define V4L2_META_FMT_UVC v4l2_fourcc('U', 'V', 'C', 'H') /* UVC Payload Header metadata */
> #define V4L2_META_FMT_D4XX v4l2_fourcc('D', '4', 'X', 'X') /* D4XX Payload Header metadata */
> +#define V4L2_META_FMT_VIVID v4l2_fourcc('V', 'I', 'V', 'D') /* Vivid Output Metadata */
>
> /* priv field value to indicates that subsequent fields are valid. */
> #define V4L2_PIX_FMT_PRIV_MAGIC 0xfeedcafe
>
This format needs to be documented in a Documentation/media/uapi/v4l/pixfmt-meta-vivid.rst file.
It would be nice if vivid would also support this metadata format for metadata capture.
Something for a follow-up patch.
Regards,
Hans
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