cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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video-stillpicture.rst (1201B)


      1.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
      2.. c:namespace:: DTV.video
      3
      4.. _VIDEO_STILLPICTURE:
      5
      6==================
      7VIDEO_STILLPICTURE
      8==================
      9
     10Name
     11----
     12
     13VIDEO_STILLPICTURE
     14
     15.. attention:: This ioctl is deprecated.
     16
     17Synopsis
     18--------
     19
     20.. c:macro:: VIDEO_STILLPICTURE
     21
     22``int ioctl(fd, VIDEO_STILLPICTURE, struct video_still_picture *sp)``
     23
     24Arguments
     25---------
     26
     27.. flat-table::
     28    :header-rows:  0
     29    :stub-columns: 0
     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_STILLPICTURE for this command.
     42
     43    -  .. row 3
     44
     45       -  struct video_still_picture \*sp
     46
     47       -  Pointer to a location where an I-frame and size is stored.
     48
     49Description
     50-----------
     51
     52This ioctl call asks the Video Device to display a still picture
     53(I-frame). The input data shall contain an I-frame. If the pointer is
     54NULL, then the current displayed still picture is blanked.
     55
     56Return Value
     57------------
     58
     59On success 0 is returned, on error -1 and the ``errno`` variable is set
     60appropriately. The generic error codes are described at the
     61:ref:`Generic Error Codes <gen-errors>` chapter.