media/v4l/hist-v4l2.rst

4 .. _hist-v4l2:
7 Changes of the V4L2 API
13 With the help of other volunteers this eventually became the V4L2 API,
68 V4L2 Version 0.16 1999-01-31
75 V4L2 Version 0.18 1999-03-16
78 Added a v4l to V4L2 ioctl compatibility layer to videodev.c. Driver
82 V4L2 Version 0.19 1999-06-05
107 V4L2 Version 0.20 (1999-09-10)
123    convention in the V4L2 API. The affected ioctls are: VIDIOC_PREVIEW,
199 V4L2 Version 0.20 incremental changes
224 ``videodevX`` on Linux 2.4.0 should recompile their V4L and V4L2
251 V4L2 Version 0.20 2000-11-23
256 1. Figures clarifying the line numbering scheme were added to the V4L2
286 V4L2 Version 0.20 2002-07-25
291 V4L2 in Linux 2.5.46, 2002-10
295 Linux 2.5, the API was revised, drawing from experience with V4L2 0.20.
302     ``O_RDWR`` regardless of the device type. All V4L2 drivers
304     flag. The ``O_NOIO`` flag, a V4L2 symbol which aliased the
312     which is encoded in the ioctl request code, thus older V4L2 devices
338     is important enough to require support of it in all V4L2 drivers
387     standards by :ref:`v4l2_std_id <v4l2-std-id>` and symbols
396     :ref:`v4l2_std_id <v4l2-std-id>` field named ``id`` was added as
411 8.  The struct :ref:`v4l2_queryctrl <v4l2-queryctrl>` fields
587     V4L2 documentation was inaccurate, this has been corrected in
590 V4L2 2003-06-19
640 V4L2 2003-11-05
644    transferred from Bill Dirks' V4L2 specification. Descriptions below
671    ``VIDEO_PALETTE_RGB24`` and ``VIDEO_PALETTE_RGB32`` formats to V4L2
674 2. Unrelated to the fixes above, drivers may still interpret some V4L2
678 V4L2 in Linux 2.6.6, 2004-05-09
686 V4L2 in Linux 2.6.8
696 V4L2 spec erratum 2004-08-01
713 V4L2 in Linux 2.6.14
717    :ref:`sliced` and replaces the interface first proposed in V4L2
720 V4L2 in Linux 2.6.15
730    :ref:`v4l2-std-id`.
739 V4L2 spec erratum 2005-11-27
748 V4L2 spec erratum 2006-01-10
760 V4L2 spec erratum 2006-02-03
766 V4L2 spec erratum 2006-02-04
774 V4L2 in Linux 2.6.17
788 V4L2 spec erratum 2006-09-23 (Draft 0.15)
816 V4L2 in Linux 2.6.18
830 V4L2 in Linux 2.6.19
851 V4L2 spec erratum 2006-10-12 (Draft 0.17)
857 V4L2 in Linux 2.6.21
864 V4L2 in Linux 2.6.22
888 V4L2 in Linux 2.6.24
895 V4L2 in Linux 2.6.25
898 1. The pixel formats :ref:`V4L2_PIX_FMT_Y16 <V4L2-PIX-FMT-Y16>` and
899    :ref:`V4L2_PIX_FMT_SBGGR16 <V4L2-PIX-FMT-SBGGR16>` were added.
921 V4L2 in Linux 2.6.26
930 V4L2 in Linux 2.6.27
941 V4L2 in Linux 2.6.28
952 V4L2 in Linux 2.6.29
967 V4L2 in Linux 2.6.30
974 V4L2 in Linux 2.6.32
977 1. In order to be easier to compare a V4L2 API and a kernel version, now
978    V4L2 API is numbered using the Linux Kernel version numeration.
1000 V4L2 in Linux 2.6.33
1006 V4L2 in Linux 2.6.34
1012 V4L2 in Linux 2.6.37
1020 V4L2 in Linux 2.6.39
1029 V4L2 in Linux 3.1
1039 V4L2 in Linux 3.2
1049 V4L2 in Linux 3.3
1058 V4L2 in Linux 3.4
1068 V4L2 in Linux 3.5
1074 2. Added selection API for V4L2 subdev interface:
1094 V4L2 in Linux 3.6
1106 V4L2 in Linux 3.9
1115 V4L2 in Linux 3.10
1126 V4L2 in Linux 3.11
1131 V4L2 in Linux 3.14
1137 V4L2 in Linux 3.15
1142 V4L2 in Linux 3.16
1147 V4L2 in Linux 3.17
1156 V4L2 in Linux 3.18
1162 V4L2 in Linux 3.19
1169 V4L2 in Linux 4.4
1181 Relation of V4L2 to other Linux multimedia APIs
1191 scope is similar to V4L2, an API to video capture and output devices for
1198 advantages over the V4L2 :ref:`video overlay interface <overlay>`. The
1218 should work just fine with all V4L2 devices through the V4L2
1219 backward-compatibility layer. Since V4L2 permits multiple opens it is
1220 possible (if supported by the V4L2 driver) to capture video while an X
1224 Only marginally related to V4L2, XFree86 extended Xv to support hardware
1227 images captured with V4L2 devices.
1232 V4L2 does not support digital terrestrial, cable or satellite broadcast.
1235 DVB API has no connection to the V4L2 API except that drivers for hybrid
1248 The following V4L2 API elements are currently experimental and may
1261 The following V4L2 API elements were superseded by new interfaces and