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Date: Wed, 9 Sep 2020 00:09:16 +0200
From: Hans Verkuil <hverkuil-cisco@...all.nl>
To: Stanimir Varbanov <stanimir.varbanov@...aro.org>,
linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-media@...r.kernel.org
Cc: Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
Philipp Zabel <p.zabel@...gutronix.de>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Neil Armstrong <narmstrong@...libre.com>,
nicolas.dufresne@...labora.com
Subject: Re: [PATCH v3 1/6] v4l2-ctrl: Add VP9 codec levels
On 08/09/2020 14:32, Stanimir Varbanov wrote:
> Add menu control for VP9 codec levels. A total of 14 levels are
> defined for Profile 0 (8bit) and Profile 2 (10bit). Each level
> is a set of constrained bitstreams coded with targeted resolutions,
> frame rates, and bitrates.
>
> The definitions have been taken from webm project [1].
>
> [1] https://www.webmproject.org/vp9/levels/
>
> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
> Reviewed-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>
Reviewed-by: Hans Verkuil <hverkuil-cisco@...all.nl>
Thanks,
Hans
> ---
> .../media/v4l/ext-ctrls-codec.rst | 43 +++++++++++++++++++
> drivers/media/v4l2-core/v4l2-ctrls.c | 21 +++++++++
> include/uapi/linux/v4l2-controls.h | 17 ++++++++
> 3 files changed, 81 insertions(+)
>
> diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> index 289d380e2cf0..ce728c757eaf 100644
> --- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> @@ -3383,6 +3383,49 @@ enum v4l2_mpeg_video_vp9_profile -
> * - ``V4L2_MPEG_VIDEO_VP9_PROFILE_3``
> - Profile 3
>
> +.. _v4l2-mpeg-video-vp9-level:
> +
> +``V4L2_CID_MPEG_VIDEO_VP9_LEVEL (enum)``
> +
> +enum v4l2_mpeg_video_vp9_level -
> + This control allows selecting the level for VP9 encoder.
> + This is also used to enumerate supported levels by VP9 encoder or decoder.
> + More information can be found at
> + `webmproject <https://www.webmproject.org/vp9/levels/>`__. Possible values are:
> +
> +.. flat-table::
> + :header-rows: 0
> + :stub-columns: 0
> +
> + * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_1_0``
> + - Level 1
> + * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_1_1``
> + - Level 1.1
> + * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_2_0``
> + - Level 2
> + * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_2_1``
> + - Level 2.1
> + * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_3_0``
> + - Level 3
> + * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_3_1``
> + - Level 3.1
> + * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_4_0``
> + - Level 4
> + * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_4_1``
> + - Level 4.1
> + * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_5_0``
> + - Level 5
> + * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_5_1``
> + - Level 5.1
> + * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_5_2``
> + - Level 5.2
> + * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_6_0``
> + - Level 6
> + * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_6_1``
> + - Level 6.1
> + * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_6_2``
> + - Level 6.2
> +
>
> High Efficiency Video Coding (HEVC/H.265) Control Reference
> ===========================================================
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
> index 73f3d65957ff..bd7f330c941c 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
> @@ -475,6 +475,23 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
> "3",
> NULL,
> };
> + static const char * const vp9_level[] = {
> + "1",
> + "1.1",
> + "2",
> + "2.1",
> + "3",
> + "3.1",
> + "4",
> + "4.1",
> + "5",
> + "5.1",
> + "5.2",
> + "6",
> + "6.1",
> + "6.2",
> + NULL,
> + };
>
> static const char * const flash_led_mode[] = {
> "Off",
> @@ -694,6 +711,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
> return vp8_profile;
> case V4L2_CID_MPEG_VIDEO_VP9_PROFILE:
> return vp9_profile;
> + case V4L2_CID_MPEG_VIDEO_VP9_LEVEL:
> + return vp9_level;
> case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
> return jpeg_chroma_subsampling;
> case V4L2_CID_DV_TX_MODE:
> @@ -950,6 +969,7 @@ const char *v4l2_ctrl_get_name(u32 id)
> case V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP: return "VPX P-Frame QP Value";
> case V4L2_CID_MPEG_VIDEO_VP8_PROFILE: return "VP8 Profile";
> case V4L2_CID_MPEG_VIDEO_VP9_PROFILE: return "VP9 Profile";
> + case V4L2_CID_MPEG_VIDEO_VP9_LEVEL: return "VP9 Level";
> case V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER: return "VP8 Frame Header";
>
> /* HEVC controls */
> @@ -1307,6 +1327,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
> case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
> case V4L2_CID_MPEG_VIDEO_VP8_PROFILE:
> case V4L2_CID_MPEG_VIDEO_VP9_PROFILE:
> + case V4L2_CID_MPEG_VIDEO_VP9_LEVEL:
> case V4L2_CID_DETECT_MD_MODE:
> case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE:
> case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL:
> diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
> index 053827cda8e6..a184c4939438 100644
> --- a/include/uapi/linux/v4l2-controls.h
> +++ b/include/uapi/linux/v4l2-controls.h
> @@ -651,6 +651,23 @@ enum v4l2_mpeg_video_vp9_profile {
> V4L2_MPEG_VIDEO_VP9_PROFILE_2 = 2,
> V4L2_MPEG_VIDEO_VP9_PROFILE_3 = 3,
> };
> +#define V4L2_CID_MPEG_VIDEO_VP9_LEVEL (V4L2_CID_MPEG_BASE+513)
> +enum v4l2_mpeg_video_vp9_level {
> + V4L2_MPEG_VIDEO_VP9_LEVEL_1_0 = 0,
> + V4L2_MPEG_VIDEO_VP9_LEVEL_1_1 = 1,
> + V4L2_MPEG_VIDEO_VP9_LEVEL_2_0 = 2,
> + V4L2_MPEG_VIDEO_VP9_LEVEL_2_1 = 3,
> + V4L2_MPEG_VIDEO_VP9_LEVEL_3_0 = 4,
> + V4L2_MPEG_VIDEO_VP9_LEVEL_3_1 = 5,
> + V4L2_MPEG_VIDEO_VP9_LEVEL_4_0 = 6,
> + V4L2_MPEG_VIDEO_VP9_LEVEL_4_1 = 7,
> + V4L2_MPEG_VIDEO_VP9_LEVEL_5_0 = 8,
> + V4L2_MPEG_VIDEO_VP9_LEVEL_5_1 = 9,
> + V4L2_MPEG_VIDEO_VP9_LEVEL_5_2 = 10,
> + V4L2_MPEG_VIDEO_VP9_LEVEL_6_0 = 11,
> + V4L2_MPEG_VIDEO_VP9_LEVEL_6_1 = 12,
> + V4L2_MPEG_VIDEO_VP9_LEVEL_6_2 = 13,
> +};
>
> /* CIDs for HEVC encoding. */
>
>
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