Documentation/media/uapi/dvb/video-set-format.rst

   1 .. -*- coding: utf-8; mode: rst -*-
   2
   3 .. _VIDEO_SET_FORMAT:
   4
   5 ================
   6 VIDEO_SET_FORMAT
   7 ================
   8
   9 Name
  10 ----
  11
  12 VIDEO_SET_FORMAT
  13
  14 .. attention:: This ioctl is deprecated.
  15
  16 Synopsis
  17 --------
  18
  19 .. c:function:: int ioctl(fd, VIDEO_SET_FORMAT, video_format_t format)
  20     :name: VIDEO_SET_FORMAT
  21
  22
  23 Arguments
  24 ---------
  25
  26 .. flat-table::
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  29
  30
  31     -  .. row 1
  32
  33        -  int fd
  34
  35        -  File descriptor returned by a previous call to open().
  36
  37     -  .. row 2
  38
  39        -  int request
  40
  41        -  Equals VIDEO_SET_FORMAT for this command.
  42
  43     -  .. row 3
  44
  45        -  video_format_t format
  46
  47        -  video format of TV as defined in section ??.
  48
  49
  50 Description
  51 -----------
  52
  53 This ioctl sets the screen format (aspect ratio) of the connected output
  54 device (TV) so that the output of the decoder can be adjusted
  55 accordingly.
  56
  57 .. c:type:: video_format_t
  58
  59 .. code-block:: c
  60
  61         typedef enum {
  62                 VIDEO_FORMAT_4_3,     /* Select 4:3 format */
  63                 VIDEO_FORMAT_16_9,    /* Select 16:9 format. */
  64                 VIDEO_FORMAT_221_1    /* 2.21:1 */
  65         } video_format_t;
  66
  67 Return Value
  68 ------------
  69
  70 On success 0 is returned, on error -1 and the ``errno`` variable is set
  71 appropriately. The generic error codes are described at the
  72 :ref:`Generic Error Codes <gen-errors>` chapter.
  73
  74
  75
  76 .. flat-table::
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  80
  81     -  .. row 1
  82
  83        -  ``EINVAL``
  84
  85        -  format is not a valid video format.