1 .. Permission is granted to copy, distribute and/or modify this
2 .. document under the terms of the GNU Free Documentation License,
3 .. Version 1.1 or any later version published by the Free Software
4 .. Foundation, with no Invariant Sections, no Front-Cover Texts
5 .. and no Back-Cover Texts. A copy of the license is included at
6 .. Documentation/media/uapi/fdl-appendix.rst.
8 .. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
21 .. attention:: This ioctl is deprecated.
26 .. c:function:: int ioctl(int fd, VIDEO_COMMAND, struct video_command *cmd)
42 - File descriptor returned by a previous call to open().
48 - Equals VIDEO_COMMAND for this command.
52 - struct video_command \*cmd
54 - Commands the decoder.
60 This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
61 this ioctl has been replaced by the
62 :ref:`VIDIOC_DECODER_CMD` ioctl.
64 This ioctl commands the decoder. The ``video_command`` struct is a
65 subset of the ``v4l2_decoder_cmd`` struct, so refer to the
66 :ref:`VIDIOC_DECODER_CMD` documentation for
69 .. c:type:: struct video_command
73 /* The structure must be zeroed before use by the application
74 This ensures it can be extended safely in the future. */
75 struct video_command {
84 /* 0 or 1000 specifies normal speed,
85 1 specifies forward single stepping,
86 -1 specifies backward single stepping,
87 >1: playback at speed/1000 of the normal speed,
88 <-1: reverse playback at (-speed/1000) of the normal speed. */
103 On success 0 is returned, on error -1 and the ``errno`` variable is set
104 appropriately. The generic error codes are described at the
105 :ref:`Generic Error Codes <gen-errors>` chapter.