1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
2 .. c:namespace:: DTV.video
15 .. attention:: This ioctl is deprecated.
20 .. c:macro:: VIDEO_COMMAND
22 ``int ioctl(int fd, VIDEO_COMMAND, struct video_command *cmd)``
35 - File descriptor returned by a previous call to open().
41 - Equals VIDEO_COMMAND for this command.
45 - struct video_command \*cmd
47 - Commands the decoder.
52 This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
53 this ioctl has been replaced by the
54 :ref:`VIDIOC_DECODER_CMD` ioctl.
56 This ioctl commands the decoder. The ``video_command`` struct is a
57 subset of the ``v4l2_decoder_cmd`` struct, so refer to the
58 :ref:`VIDIOC_DECODER_CMD` documentation for
61 .. c:type:: video_command
65 /* The structure must be zeroed before use by the application
66 This ensures it can be extended safely in the future. */
67 struct video_command {
76 /* 0 or 1000 specifies normal speed,
77 1 specifies forward single stepping,
78 -1 specifies backward single stepping,
79 >1: playback at speed/1000 of the normal speed,
80 <-1: reverse playback at (-speed/1000) of the normal speed. */
94 On success 0 is returned, on error -1 and the ``errno`` variable is set
95 appropriately. The generic error codes are described at the
96 :ref:`Generic Error Codes <gen-errors>` chapter.