Documentation/linux_tv/media/dvb/video-try-command.rst

   1 .. -*- coding: utf-8; mode: rst -*-
   2
   3 .. _VIDEO_TRY_COMMAND:
   4
   5 VIDEO_TRY_COMMAND
   6 =================
   7
   8 Description
   9 -----------
  10
  11 This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
  12 this ioctl has been replaced by the
  13 :ref:`VIDIOC_TRY_DECODER_CMD <VIDIOC_DECODER_CMD>` ioctl.
  14
  15 This ioctl tries a decoder command. The ``video_command`` struct is a
  16 subset of the ``v4l2_decoder_cmd`` struct, so refer to the
  17 :ref:`VIDIOC_TRY_DECODER_CMD <VIDIOC_DECODER_CMD>` documentation
  18 for more information.
  19
  20 Synopsis
  21 --------
  22
  23 .. c:function:: int ioctl(int fd, int request = VIDEO_TRY_COMMAND, struct video_command *cmd)
  24
  25 Arguments
  26 ----------
  27
  28
  29
  30 .. flat-table::
  31     :header-rows:  0
  32     :stub-columns: 0
  33
  34
  35     -  .. row 1
  36
  37        -  int fd
  38
  39        -  File descriptor returned by a previous call to open().
  40
  41     -  .. row 2
  42
  43        -  int request
  44
  45        -  Equals VIDEO_TRY_COMMAND for this command.
  46
  47     -  .. row 3
  48
  49        -  struct video_command \*cmd
  50
  51        -  Try a decoder command.
  52
  53
  54 Return Value
  55 ------------
  56
  57 On success 0 is returned, on error -1 and the ``errno`` variable is set
  58 appropriately. The generic error codes are described at the
  59 :ref:`Generic Error Codes <gen-errors>` chapter.
  60
  61