From: Benjamin Gaignard <benjamin.gaignard@collabora.com>
To: mchehab@kernel.org, hverkuil@xs4all.nl,
ezequiel@vanguardiasur.com.ar, p.zabel@pengutronix.de,
gregkh@linuxfoundation.org, mripard@kernel.org,
paul.kocialkowski@bootlin.com, wens@csie.org,
jernej.skrabec@gmail.com, samuel@sholland.org,
nicolas.dufresne@collabora.com
Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-rockchip@lists.infradead.org,
linux-staging@lists.linux.dev,
linux-arm-kernel@lists.infradead.org,
linux-sunxi@lists.linux.dev, sebastian.fricke@collabora.com,
Hans Verkuil <hverkuil-cisco@xs4all.nl>
Subject: [PATCH v5 01/17] videodev2.h: add V4L2_CTRL_FLAG_DYNAMIC_ARRAY
Date: Thu, 7 Apr 2022 17:29:24 +0200 [thread overview]
Message-ID: <20220407152940.738159-2-benjamin.gaignard@collabora.com> (raw)
In-Reply-To: <20220407152940.738159-1-benjamin.gaignard@collabora.com>
From: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Add a new flag that indicates that this control is a dynamically sized
array. Also document this flag.
Currently dynamically sized arrays are limited to one dimensional arrays,
but that might change in the future if there is a need for it.
The initial use-case of dynamic arrays are stateless codecs. A frame
can be divided in many slices, so you want to provide an array containing
slice information for each slice. Typically the number of slices is small,
but the standard allow for hundreds or thousands of slices. Dynamic arrays
are a good solution since sizing the array for the worst case would waste
substantial amounts of memory.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
---
.../userspace-api/media/v4l/vidioc-queryctrl.rst | 8 ++++++++
include/uapi/linux/videodev2.h | 1 +
2 files changed, 9 insertions(+)
diff --git a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
index 88f630252d98..a20dfa2a933b 100644
--- a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
+++ b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
@@ -625,6 +625,14 @@ See also the examples in :ref:`control`.
``V4L2_CTRL_FLAG_GRABBED`` flag when buffers are allocated or
streaming is in progress since most drivers do not support changing
the format in that case.
+ * - ``V4L2_CTRL_FLAG_DYNAMIC_ARRAY``
+ - 0x0800
+ - This control is a dynamically sized 1-dimensional array. It
+ behaves the same as a regular array, except that the number
+ of elements as reported by the ``elems`` field is between 1 and
+ ``dims[0]``. So setting the control with a differently sized
+ array will change the ``elems`` field when the control is
+ queried afterwards.
Return Value
============
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 3768a0a80830..8df13defde75 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1886,6 +1886,7 @@ struct v4l2_querymenu {
#define V4L2_CTRL_FLAG_HAS_PAYLOAD 0x0100
#define V4L2_CTRL_FLAG_EXECUTE_ON_WRITE 0x0200
#define V4L2_CTRL_FLAG_MODIFY_LAYOUT 0x0400
+#define V4L2_CTRL_FLAG_DYNAMIC_ARRAY 0x0800
/* Query flags, to be ORed with the control ID */
#define V4L2_CTRL_FLAG_NEXT_CTRL 0x80000000
--
2.32.0
WARNING: multiple messages have this Message-ID (diff)
From: Benjamin Gaignard <benjamin.gaignard@collabora.com>
To: mchehab@kernel.org, hverkuil@xs4all.nl,
ezequiel@vanguardiasur.com.ar, p.zabel@pengutronix.de,
gregkh@linuxfoundation.org, mripard@kernel.org,
paul.kocialkowski@bootlin.com, wens@csie.org,
jernej.skrabec@gmail.com, samuel@sholland.org,
nicolas.dufresne@collabora.com
Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-rockchip@lists.infradead.org,
linux-staging@lists.linux.dev,
linux-arm-kernel@lists.infradead.org,
linux-sunxi@lists.linux.dev, sebastian.fricke@collabora.com,
Hans Verkuil <hverkuil-cisco@xs4all.nl>
Subject: [PATCH v5 01/17] videodev2.h: add V4L2_CTRL_FLAG_DYNAMIC_ARRAY
Date: Thu, 7 Apr 2022 17:29:24 +0200 [thread overview]
Message-ID: <20220407152940.738159-2-benjamin.gaignard@collabora.com> (raw)
In-Reply-To: <20220407152940.738159-1-benjamin.gaignard@collabora.com>
From: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Add a new flag that indicates that this control is a dynamically sized
array. Also document this flag.
Currently dynamically sized arrays are limited to one dimensional arrays,
but that might change in the future if there is a need for it.
The initial use-case of dynamic arrays are stateless codecs. A frame
can be divided in many slices, so you want to provide an array containing
slice information for each slice. Typically the number of slices is small,
but the standard allow for hundreds or thousands of slices. Dynamic arrays
are a good solution since sizing the array for the worst case would waste
substantial amounts of memory.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
---
.../userspace-api/media/v4l/vidioc-queryctrl.rst | 8 ++++++++
include/uapi/linux/videodev2.h | 1 +
2 files changed, 9 insertions(+)
diff --git a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
index 88f630252d98..a20dfa2a933b 100644
--- a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
+++ b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
@@ -625,6 +625,14 @@ See also the examples in :ref:`control`.
``V4L2_CTRL_FLAG_GRABBED`` flag when buffers are allocated or
streaming is in progress since most drivers do not support changing
the format in that case.
+ * - ``V4L2_CTRL_FLAG_DYNAMIC_ARRAY``
+ - 0x0800
+ - This control is a dynamically sized 1-dimensional array. It
+ behaves the same as a regular array, except that the number
+ of elements as reported by the ``elems`` field is between 1 and
+ ``dims[0]``. So setting the control with a differently sized
+ array will change the ``elems`` field when the control is
+ queried afterwards.
Return Value
============
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 3768a0a80830..8df13defde75 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1886,6 +1886,7 @@ struct v4l2_querymenu {
#define V4L2_CTRL_FLAG_HAS_PAYLOAD 0x0100
#define V4L2_CTRL_FLAG_EXECUTE_ON_WRITE 0x0200
#define V4L2_CTRL_FLAG_MODIFY_LAYOUT 0x0400
+#define V4L2_CTRL_FLAG_DYNAMIC_ARRAY 0x0800
/* Query flags, to be ORed with the control ID */
#define V4L2_CTRL_FLAG_NEXT_CTRL 0x80000000
--
2.32.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: Benjamin Gaignard <benjamin.gaignard@collabora.com>
To: mchehab@kernel.org, hverkuil@xs4all.nl,
ezequiel@vanguardiasur.com.ar, p.zabel@pengutronix.de,
gregkh@linuxfoundation.org, mripard@kernel.org,
paul.kocialkowski@bootlin.com, wens@csie.org,
jernej.skrabec@gmail.com, samuel@sholland.org,
nicolas.dufresne@collabora.com
Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-rockchip@lists.infradead.org,
linux-staging@lists.linux.dev,
linux-arm-kernel@lists.infradead.org,
linux-sunxi@lists.linux.dev, sebastian.fricke@collabora.com,
Hans Verkuil <hverkuil-cisco@xs4all.nl>
Subject: [PATCH v5 01/17] videodev2.h: add V4L2_CTRL_FLAG_DYNAMIC_ARRAY
Date: Thu, 7 Apr 2022 17:29:24 +0200 [thread overview]
Message-ID: <20220407152940.738159-2-benjamin.gaignard@collabora.com> (raw)
In-Reply-To: <20220407152940.738159-1-benjamin.gaignard@collabora.com>
From: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Add a new flag that indicates that this control is a dynamically sized
array. Also document this flag.
Currently dynamically sized arrays are limited to one dimensional arrays,
but that might change in the future if there is a need for it.
The initial use-case of dynamic arrays are stateless codecs. A frame
can be divided in many slices, so you want to provide an array containing
slice information for each slice. Typically the number of slices is small,
but the standard allow for hundreds or thousands of slices. Dynamic arrays
are a good solution since sizing the array for the worst case would waste
substantial amounts of memory.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
---
.../userspace-api/media/v4l/vidioc-queryctrl.rst | 8 ++++++++
include/uapi/linux/videodev2.h | 1 +
2 files changed, 9 insertions(+)
diff --git a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
index 88f630252d98..a20dfa2a933b 100644
--- a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
+++ b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
@@ -625,6 +625,14 @@ See also the examples in :ref:`control`.
``V4L2_CTRL_FLAG_GRABBED`` flag when buffers are allocated or
streaming is in progress since most drivers do not support changing
the format in that case.
+ * - ``V4L2_CTRL_FLAG_DYNAMIC_ARRAY``
+ - 0x0800
+ - This control is a dynamically sized 1-dimensional array. It
+ behaves the same as a regular array, except that the number
+ of elements as reported by the ``elems`` field is between 1 and
+ ``dims[0]``. So setting the control with a differently sized
+ array will change the ``elems`` field when the control is
+ queried afterwards.
Return Value
============
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 3768a0a80830..8df13defde75 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1886,6 +1886,7 @@ struct v4l2_querymenu {
#define V4L2_CTRL_FLAG_HAS_PAYLOAD 0x0100
#define V4L2_CTRL_FLAG_EXECUTE_ON_WRITE 0x0200
#define V4L2_CTRL_FLAG_MODIFY_LAYOUT 0x0400
+#define V4L2_CTRL_FLAG_DYNAMIC_ARRAY 0x0800
/* Query flags, to be ORed with the control ID */
#define V4L2_CTRL_FLAG_NEXT_CTRL 0x80000000
--
2.32.0
_______________________________________________
Linux-rockchip mailing list
Linux-rockchip@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-rockchip
next prev parent reply other threads:[~2022-04-07 15:29 UTC|newest]
Thread overview: 113+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-07 15:29 [PATCH v5 00/17] Move HEVC stateless controls out of staging Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard [this message]
2022-04-07 15:29 ` [PATCH v5 01/17] videodev2.h: add V4L2_CTRL_FLAG_DYNAMIC_ARRAY Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` [PATCH v5 02/17] v4l2-ctrls: add support for dynamically allocated arrays Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` [PATCH v5 03/17] vivid: add dynamic array test control Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` [PATCH v5 04/17] media: uapi: HEVC: Add missing fields in HEVC controls Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-25 13:54 ` Sebastian Fricke
2022-04-25 13:54 ` Sebastian Fricke
2022-04-25 13:54 ` Sebastian Fricke
2022-04-25 16:16 ` Benjamin Gaignard
2022-04-25 16:16 ` Benjamin Gaignard
2022-04-25 16:16 ` Benjamin Gaignard
2022-04-26 7:52 ` Sebastian Fricke
2022-04-26 7:52 ` Sebastian Fricke
2022-04-26 7:52 ` Sebastian Fricke
2022-04-26 8:50 ` Benjamin Gaignard
2022-04-26 8:50 ` Benjamin Gaignard
2022-04-26 8:50 ` Benjamin Gaignard
2022-04-26 9:00 ` Sebastian Fricke
2022-04-26 9:00 ` Sebastian Fricke
2022-04-26 9:00 ` Sebastian Fricke
2022-04-07 15:29 ` [PATCH v5 05/17] media: uapi: HEVC: Rename HEVC stateless controls with STATELESS prefix Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` [PATCH v5 06/17] media: uapi: HEVC: Change pic_order_cnt definition in v4l2_hevc_dpb_entry Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 20:51 ` Nicolas Dufresne
2022-04-07 20:51 ` Nicolas Dufresne
2022-04-07 20:51 ` Nicolas Dufresne
2022-04-07 21:08 ` Nicolas Dufresne
2022-04-07 21:08 ` Nicolas Dufresne
2022-04-07 21:08 ` Nicolas Dufresne
2022-04-08 7:10 ` Benjamin Gaignard
2022-04-08 7:10 ` Benjamin Gaignard
2022-04-08 7:10 ` Benjamin Gaignard
2022-04-08 16:33 ` Nicolas Dufresne
2022-04-08 16:33 ` Nicolas Dufresne
2022-04-08 16:33 ` Nicolas Dufresne
2022-04-14 8:02 ` Benjamin Gaignard
2022-04-14 8:02 ` Benjamin Gaignard
2022-04-14 8:02 ` Benjamin Gaignard
2022-04-25 15:16 ` Sebastian Fricke
2022-04-25 15:16 ` Sebastian Fricke
2022-04-25 15:16 ` Sebastian Fricke
2022-04-07 15:29 ` [PATCH v5 07/17] media: uapi: HEVC: Add SEI pic struct flags Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-25 15:24 ` Sebastian Fricke
2022-04-25 15:24 ` Sebastian Fricke
2022-04-25 15:24 ` Sebastian Fricke
2022-04-07 15:29 ` [PATCH v5 08/17] media: uapi: HEVC: Add document uAPI structure Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-25 15:54 ` Sebastian Fricke
2022-04-25 15:54 ` Sebastian Fricke
2022-04-25 15:54 ` Sebastian Fricke
2022-04-26 7:45 ` Benjamin Gaignard
2022-04-26 7:45 ` Benjamin Gaignard
2022-04-26 7:45 ` Benjamin Gaignard
2022-04-07 15:29 ` [PATCH v5 09/17] media: uapi: HEVC: Define V4L2_CID_STATELESS_HEVC_SLICE_PARAMS as a dynamic array Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-08 18:53 ` Nicolas Dufresne
2022-04-08 18:53 ` Nicolas Dufresne
2022-04-08 18:53 ` Nicolas Dufresne
2022-04-14 9:06 ` Benjamin Gaignard
2022-04-14 9:06 ` Benjamin Gaignard
2022-04-14 9:06 ` Benjamin Gaignard
2022-04-07 15:29 ` [PATCH v5 10/17] media: uapi: Move parsed HEVC pixel format out of staging Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` [PATCH v5 11/17] media: uapi: Add V4L2_CID_STATELESS_HEVC_ENTRY_POINT_OFFSETS control Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-26 8:09 ` Sebastian Fricke
2022-04-26 8:09 ` Sebastian Fricke
2022-04-26 8:09 ` Sebastian Fricke
2022-04-07 15:29 ` [PATCH v5 12/17] media: uapi: Move the HEVC stateless control type out of staging Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` [PATCH v5 13/17] media: controls: Log HEVC stateless control in .std_log Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` [PATCH v5 14/17] media: uapi: Create a dedicated header for Hantro control Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` [PATCH v5 15/17] media: uapi: HEVC: fix padding in v4l2 control structures Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` [PATCH v5 16/17] media: uapi: Change data_bit_offset definition Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-26 8:15 ` Sebastian Fricke
2022-04-26 8:15 ` Sebastian Fricke
2022-04-26 8:15 ` Sebastian Fricke
2022-04-07 15:29 ` [PATCH v5 17/17] media: uapi: move HEVC stateless controls out of staging Benjamin Gaignard
2022-04-07 15:29 ` Benjamin Gaignard
2022-04-08 13:48 ` Sebastian Fricke
2022-04-08 13:48 ` Sebastian Fricke
2022-04-08 13:48 ` [PATCH v5 17/17] media: uapi: move HEVC stateless controls out (FIXUP) " Sebastian Fricke
2022-04-08 13:48 ` Sebastian Fricke
2022-04-14 9:22 ` Benjamin Gaignard
2022-04-14 9:22 ` Benjamin Gaignard
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