[media] hist-v4l2.rst: don't do refs to old structures

this flag if they intend to access controls only, as opposed to capture

applications which need exclusive access. The ``VIDEO_STD_XXX``

identifiers are now ordinals instead of flags, and the

:c:func:`video_std_construct()` helper function takes id and

``video_std_construct()`` helper function takes id and

transmission arguments.

1998-09-28: Revamped video standard. Made video controls individually

enumerable.

1998-10-02: The ``id`` field was removed from struct

struct :c:type:`video_standard` and the color subcarrier fields were

struct ``video_standard`` and the color subcarrier fields were

renamed. The :ref:`VIDIOC_QUERYSTD` ioctl was

renamed to :ref:`VIDIOC_ENUMSTD`,

:ref:`VIDIOC_G_INPUT <VIDIOC_G_INPUT>` to

2000-09-18: ``V4L2_BUF_TYPE_VBI`` was added. This may *break

compatibility* as the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and

:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctls may fail now if the struct

struct :c:type:`v4l2_fmt` ``type`` field does not contain

struct ``v4l2_fmt`` ``type`` field does not contain

``V4L2_BUF_TYPE_VBI``. In the documentation of the struct

:c:type:`v4l2_vbi_format` ``offset`` field the

ambiguous phrase "rising edge" was changed to "leading edge".

    originally needed to distguish between variations of standards, were

    removed.

    Struct struct :c:type:`v4l2_enumstd` ceased to be.

    Struct ``v4l2_enumstd`` ceased to be.

    :ref:`VIDIOC_ENUMSTD` now takes a pointer to a

    struct :c:type:`v4l2_standard` directly. The

    information which standards are supported by a particular video

    distinguish between field and frame (interlaced) overlay.

17. The digital zoom interface, including struct

    struct :c:type:`v4l2_zoomcap`, struct

    struct :c:type:`v4l2_zoom`, ``V4L2_ZOOM_NONCAP`` and

    struct ``v4l2_zoomcap``, struct

    struct ``v4l2_zoom``, ``V4L2_ZOOM_NONCAP`` and

    ``V4L2_ZOOM_WHILESTREAMING`` was replaced by a new cropping and

    scaling interface. The previously unused struct

    struct :c:type:`v4l2_cropcap` and :c:type:`struct v4l2_crop`

    struct :c:type:`v4l2_cropcap` and struct :c:type:`v4l2_crop`

    where redefined for this purpose. See :ref:`crop` for details.

18. In struct :c:type:`v4l2_vbi_format` the

    Similar changes were made to struct

    :c:type:`v4l2_outputparm`.

20. The struct :c:type:`v4l2_performance` and

20. The struct ``v4l2_performance`` and

    ``VIDIOC_G_PERF`` ioctl were dropped. Except when using the

    :ref:`read/write I/O method <rw>`, which is limited anyway, this

    information is already available to applications.

3. The ``VIDIOC_G_COMP`` and ``VIDIOC_S_COMP`` ioctl were renamed to

   ``VIDIOC_G_MPEGCOMP`` and ``VIDIOC_S_MPEGCOMP`` respectively. Their

   argument was replaced by a struct

   struct :c:type:`v4l2_mpeg_compression` pointer. (The

   ``v4l2_mpeg_compression`` pointer. (The

   ``VIDIOC_G_MPEGCOMP`` and ``VIDIOC_S_MPEGCOMP`` ioctls where removed

   in Linux 2.6.25.)

   flag to skip unsupported controls with

   :ref:`VIDIOC_QUERYCTRL`, new control types

   ``V4L2_CTRL_TYPE_INTEGER64`` and ``V4L2_CTRL_TYPE_CTRL_CLASS``

   (:ref:`v4l2-ctrl-type`), and new control flags

   (:c:type:`v4l2_ctrl_type`), and new control flags

   ``V4L2_CTRL_FLAG_READ_ONLY``, ``V4L2_CTRL_FLAG_UPDATE``,

   ``V4L2_CTRL_FLAG_INACTIVE`` and ``V4L2_CTRL_FLAG_SLIDER``

   (:ref:`control-flags`). See :ref:`extended-controls` for details.

1. The ``VIDIOC_G_CHIP_IDENT`` ioctl was renamed to

   ``VIDIOC_G_CHIP_IDENT_OLD`` and ``VIDIOC_DBG_G_CHIP_IDENT`` was

   introduced in its place. The old struct

   struct :c:type:`v4l2_chip_ident` was renamed to

   struct :c:type:`v4l2_chip_ident_old`.

   struct ``v4l2_chip_ident`` was renamed to

   struct ``v4l2_chip_ident_old``.

2. The pixel formats ``V4L2_PIX_FMT_VYUY``, ``V4L2_PIX_FMT_NV16`` and

   ``V4L2_PIX_FMT_NV61`` were added.