data_type large_stringclasses 3
values | source large_stringclasses 29
values | code large_stringlengths 98 49.4M | filepath large_stringlengths 5 161 ⌀ | message large_stringclasses 234
values | commit large_stringclasses 234
values | subject large_stringclasses 418
values | critique large_stringlengths 101 1.26M ⌀ | metadata dict |
|---|---|---|---|---|---|---|---|---|
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _v4l2-selection-flags:
***************
Selection flags
***************
.. _v4l2-selection-flags-table:
.. raw:: latex
\small
.. tabularcolumns:: |p{5.6cm}|p{2.0cm}|p{6.5cm}|p{1.2cm}|p{1.2cm}|
.. cssclass:: longtable
.. flat-t... | Documentation/userspace-api/media/v4l/v4l2-selection-flags.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _v4l2-selection-targets:
*****************
Selection targets
*****************
The precise meaning of the selection targets may be dependent on which
of the two interfaces they are used.
.. _v4l2-selection-targets-table:
.. raw:: ... | Documentation/userspace-api/media/v4l/v4l2-selection-targets.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. include:: <isonum.txt>
.. _v4l2spec:
############################
Part I - Video for Linux API
############################
This part describes the Video for Linux API version 2 (V4L2 API) specification.
**Revision 4.5**
.. toctree... | Documentation/userspace-api/media/v4l/v4l2.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _v4l2grab-example:
**********************************
Video Grabber example using libv4l
**********************************
This program demonstrates how to grab V4L2 images in ppm format by using
libv4l handlers. The advantage is th... | Documentation/userspace-api/media/v4l/v4l2grab-example.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
file: media/v4l/v4l2grab.c
==========================
.. code-block:: c
/* V4L2 video picture grabber
Copyright (C) 2009 Mauro Carvalho Chehab <mchehab@kernel.org>
This program is free software; you can redistribute i... | Documentation/userspace-api/media/v4l/v4l2grab.c.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _video:
************************
Video Inputs and Outputs
************************
Video inputs and outputs are physical connectors of a device. These can
be for example: RF connectors (antenna/cable), CVBS a.k.a. Composite
Video, S-... | Documentation/userspace-api/media/v4l/video.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _videodev:
***************************************
Video For Linux Two Header uAPI Symbols
***************************************
.. kernel-include:: include/uapi/linux/videodev2.h
:generate-cross-refs:
:exception-file: vide... | Documentation/userspace-api/media/v4l/videodev.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_CREATE_BUFS:
************************
ioctl VIDIOC_CREATE_BUFS
************************
Name
====
VIDIOC_CREATE_BUFS - Create buffers for Memory Mapped or User Pointer or DMA Buffer I/O
Synopsis
========
.. c:macro:: VIDIO... | Documentation/userspace-api/media/v4l/vidioc-create-bufs.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_CROPCAP:
********************
ioctl VIDIOC_CROPCAP
********************
Name
====
VIDIOC_CROPCAP - Information about the video cropping and scaling abilities
Synopsis
========
.. c:macro:: VIDIOC_CROPCAP
``int ioctl(int f... | Documentation/userspace-api/media/v4l/vidioc-cropcap.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_DBG_G_CHIP_INFO:
****************************
ioctl VIDIOC_DBG_G_CHIP_INFO
****************************
Name
====
VIDIOC_DBG_G_CHIP_INFO - Identify the chips on a TV card
Synopsis
========
.. c:macro:: VIDIOC_DBG_G_CHIP_IN... | Documentation/userspace-api/media/v4l/vidioc-dbg-g-chip-info.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_DBG_G_REGISTER:
**************************************************
ioctl VIDIOC_DBG_G_REGISTER, VIDIOC_DBG_S_REGISTER
**************************************************
Name
====
VIDIOC_DBG_G_REGISTER - VIDIOC_DBG_S_REGISTER... | Documentation/userspace-api/media/v4l/vidioc-dbg-g-register.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_DECODER_CMD:
************************************************
ioctl VIDIOC_DECODER_CMD, VIDIOC_TRY_DECODER_CMD
************************************************
Name
====
VIDIOC_DECODER_CMD - VIDIOC_TRY_DECODER_CMD - Execute ... | Documentation/userspace-api/media/v4l/vidioc-decoder-cmd.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_DQEVENT:
********************
ioctl VIDIOC_DQEVENT
********************
Name
====
VIDIOC_DQEVENT - Dequeue event
Synopsis
========
.. c:macro:: VIDIOC_DQEVENT
``int ioctl(int fd, VIDIOC_DQEVENT, struct v4l2_event *argp)``... | Documentation/userspace-api/media/v4l/vidioc-dqevent.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_DV_TIMINGS_CAP:
*********************************************************
ioctl VIDIOC_DV_TIMINGS_CAP, VIDIOC_SUBDEV_DV_TIMINGS_CAP
*********************************************************
Name
====
VIDIOC_DV_TIMINGS_CAP - ... | Documentation/userspace-api/media/v4l/vidioc-dv-timings-cap.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_ENCODER_CMD:
************************************************
ioctl VIDIOC_ENCODER_CMD, VIDIOC_TRY_ENCODER_CMD
************************************************
Name
====
VIDIOC_ENCODER_CMD - VIDIOC_TRY_ENCODER_CMD - Execute ... | Documentation/userspace-api/media/v4l/vidioc-encoder-cmd.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_ENUM_DV_TIMINGS:
***********************************************************
ioctl VIDIOC_ENUM_DV_TIMINGS, VIDIOC_SUBDEV_ENUM_DV_TIMINGS
***********************************************************
Name
====
VIDIOC_ENUM_DV_TI... | Documentation/userspace-api/media/v4l/vidioc-enum-dv-timings.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_ENUM_FMT:
*********************
ioctl VIDIOC_ENUM_FMT
*********************
Name
====
VIDIOC_ENUM_FMT - Enumerate image formats
Synopsis
========
.. c:macro:: VIDIOC_ENUM_FMT
``int ioctl(int fd, VIDIOC_ENUM_FMT, struct v4... | Documentation/userspace-api/media/v4l/vidioc-enum-fmt.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_ENUM_FRAMEINTERVALS:
********************************
ioctl VIDIOC_ENUM_FRAMEINTERVALS
********************************
Name
====
VIDIOC_ENUM_FRAMEINTERVALS - Enumerate frame intervals
Synopsis
========
.. c:macro:: VIDIOC... | Documentation/userspace-api/media/v4l/vidioc-enum-frameintervals.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_ENUM_FRAMESIZES:
****************************
ioctl VIDIOC_ENUM_FRAMESIZES
****************************
Name
====
VIDIOC_ENUM_FRAMESIZES - Enumerate frame sizes
Synopsis
========
.. c:macro:: VIDIOC_ENUM_FRAMESIZES
``int ... | Documentation/userspace-api/media/v4l/vidioc-enum-framesizes.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_ENUM_FREQ_BANDS:
****************************
ioctl VIDIOC_ENUM_FREQ_BANDS
****************************
Name
====
VIDIOC_ENUM_FREQ_BANDS - Enumerate supported frequency bands
Synopsis
========
.. c:macro:: VIDIOC_ENUM_FREQ... | Documentation/userspace-api/media/v4l/vidioc-enum-freq-bands.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_ENUMAUDIO:
**********************
ioctl VIDIOC_ENUMAUDIO
**********************
Name
====
VIDIOC_ENUMAUDIO - Enumerate audio inputs
Synopsis
========
.. c:macro:: VIDIOC_ENUMAUDIO
``int ioctl(int fd, VIDIOC_ENUMAUDIO, str... | Documentation/userspace-api/media/v4l/vidioc-enumaudio.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_ENUMAUDOUT:
***********************
ioctl VIDIOC_ENUMAUDOUT
***********************
Name
====
VIDIOC_ENUMAUDOUT - Enumerate audio outputs
Synopsis
========
.. c:macro:: VIDIOC_ENUMAUDOUT
``int ioctl(int fd, VIDIOC_ENUMAUD... | Documentation/userspace-api/media/v4l/vidioc-enumaudioout.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_ENUMINPUT:
**********************
ioctl VIDIOC_ENUMINPUT
**********************
Name
====
VIDIOC_ENUMINPUT - Enumerate video inputs
Synopsis
========
.. c:macro:: VIDIOC_ENUMINPUT
``int ioctl(int fd, VIDIOC_ENUMINPUT, str... | Documentation/userspace-api/media/v4l/vidioc-enuminput.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_ENUMOUTPUT:
***********************
ioctl VIDIOC_ENUMOUTPUT
***********************
Name
====
VIDIOC_ENUMOUTPUT - Enumerate video outputs
Synopsis
========
.. c:macro:: VIDIOC_ENUMOUTPUT
``int ioctl(int fd, VIDIOC_ENUMOUT... | Documentation/userspace-api/media/v4l/vidioc-enumoutput.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_ENUMSTD:
*******************************************
ioctl VIDIOC_ENUMSTD, VIDIOC_SUBDEV_ENUMSTD
*******************************************
Name
====
VIDIOC_ENUMSTD - VIDIOC_SUBDEV_ENUMSTD - Enumerate supported video standa... | Documentation/userspace-api/media/v4l/vidioc-enumstd.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_EXPBUF:
*******************
ioctl VIDIOC_EXPBUF
*******************
Name
====
VIDIOC_EXPBUF - Export a buffer as a DMABUF file descriptor.
Synopsis
========
.. c:macro:: VIDIOC_EXPBUF
``int ioctl(int fd, VIDIOC_EXPBUF, st... | Documentation/userspace-api/media/v4l/vidioc-expbuf.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_AUDIO:
************************************
ioctl VIDIOC_G_AUDIO, VIDIOC_S_AUDIO
************************************
Name
====
VIDIOC_G_AUDIO - VIDIOC_S_AUDIO - Query or select the current audio input and its attributes
... | Documentation/userspace-api/media/v4l/vidioc-g-audio.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_AUDOUT:
**************************************
ioctl VIDIOC_G_AUDOUT, VIDIOC_S_AUDOUT
**************************************
Name
====
VIDIOC_G_AUDOUT - VIDIOC_S_AUDOUT - Query or select the current audio output
Synopsis
... | Documentation/userspace-api/media/v4l/vidioc-g-audioout.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_CROP:
**********************************
ioctl VIDIOC_G_CROP, VIDIOC_S_CROP
**********************************
Name
====
VIDIOC_G_CROP - VIDIOC_S_CROP - Get or set the current cropping rectangle
Synopsis
========
.. c:ma... | Documentation/userspace-api/media/v4l/vidioc-g-crop.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_CTRL:
**********************************
ioctl VIDIOC_G_CTRL, VIDIOC_S_CTRL
**********************************
Name
====
VIDIOC_G_CTRL - VIDIOC_S_CTRL - Get or set the value of a control
Synopsis
========
.. c:macro:: VI... | Documentation/userspace-api/media/v4l/vidioc-g-ctrl.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_DV_TIMINGS:
**********************************************
ioctl VIDIOC_G_DV_TIMINGS, VIDIOC_S_DV_TIMINGS
**********************************************
Name
====
VIDIOC_G_DV_TIMINGS - VIDIOC_S_DV_TIMINGS - VIDIOC_SUBDEV_G... | Documentation/userspace-api/media/v4l/vidioc-g-dv-timings.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_EDID:
******************************************************************************
ioctl VIDIOC_G_EDID, VIDIOC_S_EDID, VIDIOC_SUBDEV_G_EDID, VIDIOC_SUBDEV_S_EDID
************************************************************... | Documentation/userspace-api/media/v4l/vidioc-g-edid.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_ENC_INDEX:
************************
ioctl VIDIOC_G_ENC_INDEX
************************
Name
====
VIDIOC_G_ENC_INDEX - Get meta data about a compressed video stream
Synopsis
========
.. c:macro:: VIDIOC_G_ENC_INDEX
``int ... | Documentation/userspace-api/media/v4l/vidioc-g-enc-index.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_EXT_CTRLS:
******************************************************************
ioctl VIDIOC_G_EXT_CTRLS, VIDIOC_S_EXT_CTRLS, VIDIOC_TRY_EXT_CTRLS
******************************************************************
Name
====
... | Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_FBUF:
**********************************
ioctl VIDIOC_G_FBUF, VIDIOC_S_FBUF
**********************************
Name
====
VIDIOC_G_FBUF - VIDIOC_S_FBUF - Get or set frame buffer overlay parameters
Synopsis
========
.. c:m... | Documentation/userspace-api/media/v4l/vidioc-g-fbuf.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_FMT:
************************************************
ioctl VIDIOC_G_FMT, VIDIOC_S_FMT, VIDIOC_TRY_FMT
************************************************
Name
====
VIDIOC_G_FMT - VIDIOC_S_FMT - VIDIOC_TRY_FMT - Get or set th... | Documentation/userspace-api/media/v4l/vidioc-g-fmt.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_FREQUENCY:
********************************************
ioctl VIDIOC_G_FREQUENCY, VIDIOC_S_FREQUENCY
********************************************
Name
====
VIDIOC_G_FREQUENCY - VIDIOC_S_FREQUENCY - Get or set tuner or modu... | Documentation/userspace-api/media/v4l/vidioc-g-frequency.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_INPUT:
************************************
ioctl VIDIOC_G_INPUT, VIDIOC_S_INPUT
************************************
Name
====
VIDIOC_G_INPUT - VIDIOC_S_INPUT - Query or select the current video input
Synopsis
========
... | Documentation/userspace-api/media/v4l/vidioc-g-input.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_JPEGCOMP:
******************************************
ioctl VIDIOC_G_JPEGCOMP, VIDIOC_S_JPEGCOMP
******************************************
Name
====
VIDIOC_G_JPEGCOMP - VIDIOC_S_JPEGCOMP
Synopsis
========
.. c:macro:: VI... | Documentation/userspace-api/media/v4l/vidioc-g-jpegcomp.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_MODULATOR:
********************************************
ioctl VIDIOC_G_MODULATOR, VIDIOC_S_MODULATOR
********************************************
Name
====
VIDIOC_G_MODULATOR - VIDIOC_S_MODULATOR - Get or set modulator att... | Documentation/userspace-api/media/v4l/vidioc-g-modulator.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_OUTPUT:
**************************************
ioctl VIDIOC_G_OUTPUT, VIDIOC_S_OUTPUT
**************************************
Name
====
VIDIOC_G_OUTPUT - VIDIOC_S_OUTPUT - Query or select the current video output
Synopsis
... | Documentation/userspace-api/media/v4l/vidioc-g-output.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_PARM:
**********************************
ioctl VIDIOC_G_PARM, VIDIOC_S_PARM
**********************************
Name
====
VIDIOC_G_PARM - VIDIOC_S_PARM - Get or set streaming parameters
Synopsis
========
.. c:macro:: VIDI... | Documentation/userspace-api/media/v4l/vidioc-g-parm.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_PRIORITY:
******************************************
ioctl VIDIOC_G_PRIORITY, VIDIOC_S_PRIORITY
******************************************
Name
====
VIDIOC_G_PRIORITY - VIDIOC_S_PRIORITY - Query or request the access prior... | Documentation/userspace-api/media/v4l/vidioc-g-priority.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_SELECTION:
********************************************
ioctl VIDIOC_G_SELECTION, VIDIOC_S_SELECTION
********************************************
Name
====
VIDIOC_G_SELECTION - VIDIOC_S_SELECTION - Get or set one of the se... | Documentation/userspace-api/media/v4l/vidioc-g-selection.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_SLICED_VBI_CAP:
*****************************
ioctl VIDIOC_G_SLICED_VBI_CAP
*****************************
Name
====
VIDIOC_G_SLICED_VBI_CAP - Query sliced VBI capabilities
Synopsis
========
.. c:macro:: VIDIOC_G_SLICED_V... | Documentation/userspace-api/media/v4l/vidioc-g-sliced-vbi-cap.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_STD:
**************************************************************************
ioctl VIDIOC_G_STD, VIDIOC_S_STD, VIDIOC_SUBDEV_G_STD, VIDIOC_SUBDEV_S_STD
*********************************************************************... | Documentation/userspace-api/media/v4l/vidioc-g-std.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_G_TUNER:
************************************
ioctl VIDIOC_G_TUNER, VIDIOC_S_TUNER
************************************
Name
====
VIDIOC_G_TUNER - VIDIOC_S_TUNER - Get or set tuner attributes
Synopsis
========
.. c:macro::... | Documentation/userspace-api/media/v4l/vidioc-g-tuner.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_LOG_STATUS:
***********************
ioctl VIDIOC_LOG_STATUS
***********************
Name
====
VIDIOC_LOG_STATUS - Log driver status information
Synopsis
========
.. c:macro:: VIDIOC_LOG_STATUS
``int ioctl(int fd, VIDIOC_L... | Documentation/userspace-api/media/v4l/vidioc-log-status.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_OVERLAY:
********************
ioctl VIDIOC_OVERLAY
********************
Name
====
VIDIOC_OVERLAY - Start or stop video overlay
Synopsis
========
.. c:macro:: VIDIOC_OVERLAY
``int ioctl(int fd, VIDIOC_OVERLAY, const int *a... | Documentation/userspace-api/media/v4l/vidioc-overlay.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_PREPARE_BUF:
************************
ioctl VIDIOC_PREPARE_BUF
************************
Name
====
VIDIOC_PREPARE_BUF - Prepare a buffer for I/O
Synopsis
========
.. c:macro:: VIDIOC_PREPARE_BUF
``int ioctl(int fd, VIDIOC_... | Documentation/userspace-api/media/v4l/vidioc-prepare-buf.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_QBUF:
*******************************
ioctl VIDIOC_QBUF, VIDIOC_DQBUF
*******************************
Name
====
VIDIOC_QBUF - VIDIOC_DQBUF - Exchange a buffer with the driver
Synopsis
========
.. c:macro:: VIDIOC_QBUF
``i... | Documentation/userspace-api/media/v4l/vidioc-qbuf.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_QUERY_DV_TIMINGS:
*****************************
ioctl VIDIOC_QUERY_DV_TIMINGS
*****************************
Name
====
VIDIOC_QUERY_DV_TIMINGS - VIDIOC_SUBDEV_QUERY_DV_TIMINGS - Sense the DV preset received by the current inp... | Documentation/userspace-api/media/v4l/vidioc-query-dv-timings.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_QUERYBUF:
*********************
ioctl VIDIOC_QUERYBUF
*********************
Name
====
VIDIOC_QUERYBUF - Query the status of a buffer
Synopsis
========
.. c:macro:: VIDIOC_QUERYBUF
``int ioctl(int fd, VIDIOC_QUERYBUF, stru... | Documentation/userspace-api/media/v4l/vidioc-querybuf.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_QUERYCAP:
*********************
ioctl VIDIOC_QUERYCAP
*********************
Name
====
VIDIOC_QUERYCAP - Query device capabilities
Synopsis
========
.. c:macro:: VIDIOC_QUERYCAP
``int ioctl(int fd, VIDIOC_QUERYCAP, struct ... | Documentation/userspace-api/media/v4l/vidioc-querycap.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_QUERYCTRL:
*******************************************************************
ioctls VIDIOC_QUERYCTRL, VIDIOC_QUERY_EXT_CTRL and VIDIOC_QUERYMENU
*******************************************************************
Name
====
... | Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_QUERYSTD:
*********************************************
ioctl VIDIOC_QUERYSTD, VIDIOC_SUBDEV_QUERYSTD
*********************************************
Name
====
VIDIOC_QUERYSTD - VIDIOC_SUBDEV_QUERYSTD - Sense the video standar... | Documentation/userspace-api/media/v4l/vidioc-querystd.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_REMOVE_BUFS:
************************
ioctl VIDIOC_REMOVE_BUFS
************************
Name
====
VIDIOC_REMOVE_BUFS - Removes buffers from a queue
Synopsis
========
.. c:macro:: VIDIOC_REMOVE_BUFS
``int ioctl(int fd, VID... | Documentation/userspace-api/media/v4l/vidioc-remove-bufs.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_REQBUFS:
********************
ioctl VIDIOC_REQBUFS
********************
Name
====
VIDIOC_REQBUFS - Initiate Memory Mapping, User Pointer I/O or DMA buffer I/O
Synopsis
========
.. c:macro:: VIDIOC_REQBUFS
``int ioctl(int ... | Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_S_HW_FREQ_SEEK:
***************************
ioctl VIDIOC_S_HW_FREQ_SEEK
***************************
Name
====
VIDIOC_S_HW_FREQ_SEEK - Perform a hardware frequency seek
Synopsis
========
.. c:macro:: VIDIOC_S_HW_FREQ_SEEK
... | Documentation/userspace-api/media/v4l/vidioc-s-hw-freq-seek.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_STREAMON:
***************************************
ioctl VIDIOC_STREAMON, VIDIOC_STREAMOFF
***************************************
Name
====
VIDIOC_STREAMON - VIDIOC_STREAMOFF - Start or stop streaming I/O
Synopsis
========
... | Documentation/userspace-api/media/v4l/vidioc-streamon.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL:
***************************************
ioctl VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL
***************************************
Name
====
VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL - Enumerate frame intervals
Syn... | Documentation/userspace-api/media/v4l/vidioc-subdev-enum-frame-interval.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_SUBDEV_ENUM_FRAME_SIZE:
***********************************
ioctl VIDIOC_SUBDEV_ENUM_FRAME_SIZE
***********************************
Name
====
VIDIOC_SUBDEV_ENUM_FRAME_SIZE - Enumerate media bus frame sizes
Synopsis
========... | Documentation/userspace-api/media/v4l/vidioc-subdev-enum-frame-size.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_SUBDEV_ENUM_MBUS_CODE:
**********************************
ioctl VIDIOC_SUBDEV_ENUM_MBUS_CODE
**********************************
Name
====
VIDIOC_SUBDEV_ENUM_MBUS_CODE - Enumerate media bus formats
Synopsis
========
.. c:ma... | Documentation/userspace-api/media/v4l/vidioc-subdev-enum-mbus-code.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_SUBDEV_G_CLIENT_CAP:
************************************************************
ioctl VIDIOC_SUBDEV_G_CLIENT_CAP, VIDIOC_SUBDEV_S_CLIENT_CAP
************************************************************
Name
====
VIDIOC_SUB... | Documentation/userspace-api/media/v4l/vidioc-subdev-g-client-cap.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_SUBDEV_G_CROP:
************************************************
ioctl VIDIOC_SUBDEV_G_CROP, VIDIOC_SUBDEV_S_CROP
************************************************
Name
====
VIDIOC_SUBDEV_G_CROP - VIDIOC_SUBDEV_S_CROP - Get or... | Documentation/userspace-api/media/v4l/vidioc-subdev-g-crop.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_SUBDEV_G_FMT:
**********************************************
ioctl VIDIOC_SUBDEV_G_FMT, VIDIOC_SUBDEV_S_FMT
**********************************************
Name
====
VIDIOC_SUBDEV_G_FMT - VIDIOC_SUBDEV_S_FMT - Get or set the ... | Documentation/userspace-api/media/v4l/vidioc-subdev-g-fmt.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_SUBDEV_G_FRAME_INTERVAL:
********************************************************************
ioctl VIDIOC_SUBDEV_G_FRAME_INTERVAL, VIDIOC_SUBDEV_S_FRAME_INTERVAL
***************************************************************... | Documentation/userspace-api/media/v4l/vidioc-subdev-g-frame-interval.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_SUBDEV_G_ROUTING:
******************************************************
ioctl VIDIOC_SUBDEV_G_ROUTING, VIDIOC_SUBDEV_S_ROUTING
******************************************************
Name
====
VIDIOC_SUBDEV_G_ROUTING - VIDIO... | Documentation/userspace-api/media/v4l/vidioc-subdev-g-routing.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_SUBDEV_G_SELECTION:
**********************************************************
ioctl VIDIOC_SUBDEV_G_SELECTION, VIDIOC_SUBDEV_S_SELECTION
**********************************************************
Name
====
VIDIOC_SUBDEV_G_S... | Documentation/userspace-api/media/v4l/vidioc-subdev-g-selection.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_SUBDEV_QUERYCAP:
****************************
ioctl VIDIOC_SUBDEV_QUERYCAP
****************************
Name
====
VIDIOC_SUBDEV_QUERYCAP - Query sub-device capabilities
Synopsis
========
.. c:macro:: VIDIOC_SUBDEV_QUERYCAP... | Documentation/userspace-api/media/v4l/vidioc-subdev-querycap.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _VIDIOC_SUBSCRIBE_EVENT:
.. _VIDIOC_UNSUBSCRIBE_EVENT:
******************************************************
ioctl VIDIOC_SUBSCRIBE_EVENT, VIDIOC_UNSUBSCRIBE_EVENT
******************************************************
Name
====
VI... | Documentation/userspace-api/media/v4l/vidioc-subscribe-event.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L
.. _yuv-formats:
***********
YUV Formats
***********
YUV is the format native to TV broadcast and composite video signals. It
separates the brightness information (Y) from the color information (U
and V or Cb and Cr). The color informat... | Documentation/userspace-api/media/v4l/yuv-formats.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: BSD-3-Clause
==============================
Netlink spec C code generation
==============================
This document describes how Netlink specifications are used to render
C code (uAPI, policies etc.). It also defines the additional properties
allowed in older families by the ``genetli... | Documentation/userspace-api/netlink/c-code-gen.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: BSD-3-Clause
=================================================================
Netlink specification support for legacy Generic Netlink families
=================================================================
This document describes the many additional quirks and properties
required to d... | Documentation/userspace-api/netlink/genetlink-legacy.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: BSD-3-Clause
================
Netlink Handbook
================
Netlink documentation for users.
.. toctree::
:maxdepth: 2
intro
intro-specs
specs
c-code-gen
genetlink-legacy
netlink-raw
See also:
- :ref:`Documentation/core-api/netlink.rst <kernel_netlink>`
- :ref... | Documentation/userspace-api/netlink/index.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: BSD-3-Clause
=====================================
Using Netlink protocol specifications
=====================================
This document is a quick starting guide for using Netlink protocol
specifications. For more detailed description of the specs see :doc:`specs`.
Simple CLI
=======... | Documentation/userspace-api/netlink/intro-specs.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: BSD-3-Clause
=======================
Introduction to Netlink
=======================
Netlink is often described as an ioctl() replacement.
It aims to replace fixed-format C structures as supplied
to ioctl() with a format which allows an easy way to add
or extended the arguments.
To achiev... | Documentation/userspace-api/netlink/intro.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: BSD-3-Clause
======================================================
Netlink specification support for raw Netlink families
======================================================
This document describes the additional properties required by raw Netlink
families such as ``NETLINK_ROUTE`` whi... | Documentation/userspace-api/netlink/netlink-raw.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: BSD-3-Clause
=========================================
Netlink protocol specifications (in YAML)
=========================================
Netlink protocol specifications are complete, machine readable descriptions of
Netlink protocols written in YAML. The goal of the specifications is to ... | Documentation/userspace-api/netlink/specs.rst | null | null | null | null | null |
source | linux | ==================
Guest halt polling
==================
The cpuidle_haltpoll driver, with the haltpoll governor, allows
the guest vcpus to poll for a specified amount of time before
halting.
This provides the following benefits to host side polling:
1) The POLL flag is set while polling is performed, which allows
... | Documentation/virt/guest-halt-polling.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
======================
Virtualization Support
======================
.. toctree::
:maxdepth: 2
kvm/index
uml/user_mode_linux_howto_v2
paravirt_ops
guest-halt-polling
ne_overview
acrn/index
coco/sev-guest
coco/tdx-guest
hyperv/index | Documentation/virt/index.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==============
Nitro Enclaves
==============
Overview
========
Nitro Enclaves (NE) is a new Amazon Elastic Compute Cloud (EC2) capability
that allows customers to carve out isolated compute environments within EC2
instances [1].
For example, an application that processes sensitiv... | Documentation/virt/ne_overview.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
============
Paravirt_ops
============
Linux provides support for different hypervisor virtualization technologies.
Historically, different binary kernels would be required in order to support
different hypervisors; this restriction was removed with pv_ops.
Linux pv_ops is a virtua... | Documentation/virt/paravirt_ops.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===============
ACRN CPUID bits
===============
A guest VM running on an ACRN hypervisor can check some of its features using
CPUID.
ACRN cpuid functions are:
function: 0x40000000
returns::
eax = 0x40000010
ebx = 0x4e524341
ecx = 0x4e524341
edx = 0x4e524341
Note th... | Documentation/virt/acrn/cpuid.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===============
ACRN Hypervisor
===============
.. toctree::
:maxdepth: 1
introduction
io-request
cpuid | Documentation/virt/acrn/index.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
ACRN Hypervisor Introduction
============================
The ACRN Hypervisor is a Type 1 hypervisor, running directly on bare-metal
hardware. It has a privileged management VM, called Service VM, to manage User
VMs and do I/O emulation.
ACRN userspace is an application running in... | Documentation/virt/acrn/introduction.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
I/O request handling
====================
An I/O request of a User VM, which is constructed by the hypervisor, is
distributed by the ACRN Hypervisor Service Module to an I/O client
corresponding to the address range of the I/O request. Details of I/O request
handling are described ... | Documentation/virt/acrn/io-request.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===================================================================
The Definitive SEV Guest API Documentation
===================================================================
1. General description
======================
The SEV API is a set of ioctls that are used by the gues... | Documentation/virt/coco/sev-guest.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===================================================================
TDX Guest API Documentation
===================================================================
1. General description
======================
The TDX guest driver exposes IOCTL interfaces via the /dev/tdx-guest mi... | Documentation/virt/coco/tdx-guest.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
Clocks and Timers
=================
arm64
-----
On arm64, Hyper-V virtualizes the ARMv8 architectural system counter
and timer. Guest VMs use this virtualized hardware as the Linux
clocksource and clockevents via the standard arm_arch_timer.c
driver, just as they would on bare meta... | Documentation/virt/hyperv/clocks.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
Confidential Computing VMs
==========================
Hyper-V can create and run Linux guests that are Confidential Computing
(CoCo) VMs. Such VMs cooperate with the physical processor to better protect
the confidentiality and integrity of data in the VM's memory, even in the
face o... | Documentation/virt/hyperv/coco.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
Hibernating Guest VMs
=====================
Background
----------
Linux supports the ability to hibernate itself in order to save power.
Hibernation is sometimes called suspend-to-disk, as it writes a memory
image to disk and puts the hardware into the lowest possible power
state. ... | Documentation/virt/hyperv/hibernation.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
======================
Hyper-V Enlightenments
======================
.. toctree::
:maxdepth: 1
overview
vmbus
clocks
vpci
hibernation
coco | Documentation/virt/hyperv/index.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
Overview
========
The Linux kernel contains a variety of code for running as a fully
enlightened guest on Microsoft's Hyper-V hypervisor. Hyper-V
consists primarily of a bare-metal hypervisor plus a virtual machine
management service running in the parent partition (roughly
equival... | Documentation/virt/hyperv/overview.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
VMBus
=====
VMBus is a software construct provided by Hyper-V to guest VMs. It
consists of a control path and common facilities used by synthetic
devices that Hyper-V presents to guest VMs. The control path is
used to offer synthetic devices to the guest VM and, in some cases,
to... | Documentation/virt/hyperv/vmbus.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
PCI pass-thru devices
=========================
In a Hyper-V guest VM, PCI pass-thru devices (also called
virtual PCI devices, or vPCI devices) are physical PCI devices
that are mapped directly into the VM's physical address space.
Guest device drivers can interact directly with the... | Documentation/virt/hyperv/vpci.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===================================================================
The Definitive KVM (Kernel-based Virtual Machine) API Documentation
===================================================================
1. General description
======================
The kvm API is centered around ... | Documentation/virt/kvm/api.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===========================
The KVM halt polling system
===========================
The KVM halt polling system provides a feature within KVM whereby the latency
of a guest can, under some circumstances, be reduced by polling in the host
for some time period after the guest has ele... | Documentation/virt/kvm/halt-polling.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===
KVM
===
.. toctree::
:maxdepth: 2
api
devices/index
arm/index
s390/index
ppc-pv
x86/index
loongarch/index
locking
vcpu-requests
halt-polling
review-checklist | Documentation/virt/kvm/index.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=================
KVM Lock Overview
=================
1. Acquisition Orders
---------------------
The acquisition orders for mutexes are as follows:
- cpus_read_lock() is taken outside kvm_lock
- kvm_usage_lock is taken outside cpus_read_lock()
- kvm->lock is taken outside vcpu... | Documentation/virt/kvm/locking.rst | null | null | null | null | null |
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