From: Hans Verkuil <hverkuil-cisco@xs4all.nl>
To: Fish Lin <linfish@google.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: Paul Kocialkowski <paul.kocialkowski@bootlin.com>,
Tomasz Figa <tfiga@chromium.org>,
Keiichi Watanabe <keiichiw@chromium.org>,
Smitha T Murthy <smitha.t@samsung.com>,
linux-media@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4] Add following V4L2 QP parameters for H.264: * V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP * V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP * V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP * V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP
Date: Wed, 20 Mar 2019 16:00:36 +0100 [thread overview]
Message-ID: <ef29126b-c118-f91f-3b23-c5103bad232a@xs4all.nl> (raw)
In-Reply-To: <20190315084021.3572-1-linfish@google.com>
This subject line is insanely long :-)
Please use a short subject line for v5 (i.e. "Add V4L2 QP parameters for H.264")
and mention the actual parameters you are adding in the commit log.
Some more comments below:
On 3/15/19 9:40 AM, Fish Lin wrote:
> These controls will limit QP range for intra and inter frame,
> provide more manual control to improve video encode quality.
>
> Signed-off-by: Fish Lin <linfish@google.com>
> ---
> Changelog since v3:
> - Put document in ext-ctrls-codec.rst instead of extended-controls.rst
> (which was previous version).
>
> Changelog since v2:
> - Add interaction with V4L2_CID_MPEG_VIDEO_H264_MIN/MAX_QP
> description in the document.
>
> Changelog since v1:
> - Add description in document.
>
> .../media/uapi/v4l/ext-ctrls-codec.rst | 24 +++++++++++++++++++
> drivers/media/v4l2-core/v4l2-ctrls.c | 4 ++++
> include/uapi/linux/v4l2-controls.h | 6 +++++
> 3 files changed, 34 insertions(+)
>
> diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
> index c97fb7923be5..de60b2e788eb 100644
> --- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
> +++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
> @@ -1048,6 +1048,30 @@ enum v4l2_mpeg_video_h264_entropy_mode -
> Quantization parameter for an B frame for H264. Valid range: from 0
> to 51.
>
> +``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP (integer)``
> + Minimum quantization parameter for H264 I frame, to limit I frame
H264 -> the H264
frame, to -> frame to
Same below.
> + quality in a range. Valid range: from 0 to 51. If
in -> to
(you limit a value *to* a range, not 'in a range')
Same below.
Regards,
Hans
> + V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter
> + should be chosen to meet both requirements.
> +
> +``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP (integer)``
> + Maximum quantization parameter for H264 I frame, to limit I frame
> + quality in a range. Valid range: from 0 to 51. If
> + V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter
> + should be chosen to meet both requirements.
> +
> +``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP (integer)``
> + Minimum quantization parameter for H264 P frame, to limit P frame
> + quality in a range. Valid range: from 0 to 51. If
> + V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter
> + should be chosen to meet both requirements.
> +
> +``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP (integer)``
> + Maximum quantization parameter for H264 P frame, to limit P frame
> + quality in a range. Valid range: from 0 to 51. If
> + V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter
> + should be chosen to meet both requirements.
> +
> ``V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP (integer)``
> Quantization parameter for an I frame for MPEG4. Valid range: from 1
> to 31.
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
> index b79d3bbd8350..115fb8debe23 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
> @@ -828,6 +828,10 @@ const char *v4l2_ctrl_get_name(u32 id)
> case V4L2_CID_MPEG_VIDEO_H264_CONSTRAINED_INTRA_PREDICTION:
> return "H264 Constrained Intra Pred";
> case V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET: return "H264 Chroma QP Index Offset";
> + case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP: return "H264 I-Frame Minimum QP Value";
> + case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP: return "H264 I-Frame Maximum QP Value";
> + case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP: return "H264 P-Frame Minimum QP Value";
> + case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP: return "H264 P-Frame Maximum QP Value";
> case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value";
> case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value";
> case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value";
> diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
> index 06479f2fb3ae..4421baa84177 100644
> --- a/include/uapi/linux/v4l2-controls.h
> +++ b/include/uapi/linux/v4l2-controls.h
> @@ -535,6 +535,12 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type {
> #define V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP (V4L2_CID_MPEG_BASE+382)
> #define V4L2_CID_MPEG_VIDEO_H264_CONSTRAINED_INTRA_PREDICTION (V4L2_CID_MPEG_BASE+383)
> #define V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET (V4L2_CID_MPEG_BASE+384)
> +
> +#define V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP (V4L2_CID_MPEG_BASE+390)
> +#define V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP (V4L2_CID_MPEG_BASE+391)
> +#define V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP (V4L2_CID_MPEG_BASE+392)
> +#define V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP (V4L2_CID_MPEG_BASE+393)
> +
> #define V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP (V4L2_CID_MPEG_BASE+400)
> #define V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP (V4L2_CID_MPEG_BASE+401)
> #define V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP (V4L2_CID_MPEG_BASE+402)
>
next prev parent reply other threads:[~2019-03-20 15:00 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-28 7:29 [PATCH] [media] v4l: add I / P frame min max QP definitions Fish Lin
2019-01-30 7:45 ` [PATCH v2] " Fish Lin
2019-01-30 7:56 ` Hans Verkuil
2019-01-30 8:56 ` Fish Lin
2019-01-30 9:11 ` [PATCH v3] " Fish Lin
2019-02-08 9:58 ` Hans Verkuil
2019-02-12 9:23 ` Fish Lin
2019-03-15 8:40 ` [PATCH v4] Add following V4L2 QP parameters for H.264: * V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP * V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP * V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP * V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP Fish Lin
2019-03-20 15:00 ` Hans Verkuil [this message]
2019-03-21 2:08 ` Fish Lin
2019-03-20 6:18 ` [PATCH v5][media] v4l: add I / P frame min max QP definitions Fish Lin
2019-03-21 2:20 ` [PATCH v6] [media] " Fish Lin
2019-03-28 15:01 ` Hans Verkuil
2019-03-29 2:57 ` Fish Lin
2019-03-29 2:59 ` [PATCH v7] " Fish Lin
2019-03-29 3:14 ` Fish Lin
2019-03-29 3:20 ` [PATCH v8] " Fish Lin
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