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-.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
-.. c:namespace:: DTV.video
-
-.. _VIDEO_GET_EVENT:
-
-===============
-VIDEO_GET_EVENT
-===============
-
-Name
-----
-
-VIDEO_GET_EVENT
-
-.. attention:: This ioctl is deprecated.
-
-Synopsis
---------
-
-.. c:macro:: VIDEO_GET_EVENT
-
-``int ioctl(fd, VIDEO_GET_EVENT, struct video_event *ev)``
-
-Arguments
----------
-
-.. flat-table::
- :header-rows: 0
- :stub-columns: 0
-
- - .. row 1
-
- - int fd
-
- - File descriptor returned by a previous call to open().
-
- - .. row 2
-
- - int request
-
- - Equals VIDEO_GET_EVENT for this command.
-
- - .. row 3
-
- - struct video_event \*ev
-
- - Points to the location where the event, if any, is to be stored.
-
-Description
------------
-
-This ioctl is for Digital TV devices only. To get events from a V4L2 decoder
-use the V4L2 :ref:`VIDIOC_DQEVENT` ioctl instead.
-
-This ioctl call returns an event of type video_event if available. If
-an event is not available, the behavior depends on whether the device is
-in blocking or non-blocking mode. In the latter case, the call fails
-immediately with errno set to ``EWOULDBLOCK``. In the former case, the call
-blocks until an event becomes available. The standard Linux poll()
-and/or select() system calls can be used with the device file descriptor
-to watch for new events. For select(), the file descriptor should be
-included in the exceptfds argument, and for poll(), POLLPRI should be
-specified as the wake-up condition. Read-only permissions are sufficient
-for this ioctl call.
-
-.. c:type:: video_event
-
-.. code-block:: c
-
- struct video_event {
- __s32 type;
- #define VIDEO_EVENT_SIZE_CHANGED 1
- #define VIDEO_EVENT_FRAME_RATE_CHANGED 2
- #define VIDEO_EVENT_DECODER_STOPPED 3
- #define VIDEO_EVENT_VSYNC 4
- long timestamp;
- union {
- video_size_t size;
- unsigned int frame_rate; /* in frames per 1000sec */
- unsigned char vsync_field; /* unknown/odd/even/progressive */
- } u;
- };
-
-Return Value
-------------
-
-On success 0 is returned, on error -1 and the ``errno`` variable is set
-appropriately. The generic error codes are described at the
-:ref:`Generic Error Codes <gen-errors>` chapter.
-
-.. flat-table::
- :header-rows: 0
- :stub-columns: 0
-
- - .. row 1
-
- - ``EWOULDBLOCK``
-
- - There is no event pending, and the device is in non-blocking mode.
-
- - .. row 2
-
- - ``EOVERFLOW``
-
- - Overflow in event queue - one or more events were lost.