diff options
Diffstat (limited to 'Documentation/userspace-api/media/dvb/video-get-event.rst')
| -rw-r--r-- | Documentation/userspace-api/media/dvb/video-get-event.rst | 105 |
1 files changed, 0 insertions, 105 deletions
diff --git a/Documentation/userspace-api/media/dvb/video-get-event.rst b/Documentation/userspace-api/media/dvb/video-get-event.rst deleted file mode 100644 index 90382bc36cfe..000000000000 --- a/Documentation/userspace-api/media/dvb/video-get-event.rst +++ /dev/null @@ -1,105 +0,0 @@ -.. 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. |