video-try-command.rst (1337B)
1.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2.. c:namespace:: DTV.video 3 4.. _VIDEO_TRY_COMMAND: 5 6================= 7VIDEO_TRY_COMMAND 8================= 9 10Name 11---- 12 13VIDEO_TRY_COMMAND 14 15.. attention:: This ioctl is deprecated. 16 17Synopsis 18-------- 19 20.. c:macro:: VIDEO_TRY_COMMAND 21 22``int ioctl(int fd, VIDEO_TRY_COMMAND, struct video_command *cmd)`` 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_TRY_COMMAND for this command. 42 43 - .. row 3 44 45 - struct video_command \*cmd 46 47 - Try a decoder command. 48 49Description 50----------- 51 52This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders 53this ioctl has been replaced by the 54:ref:`VIDIOC_TRY_DECODER_CMD <VIDIOC_DECODER_CMD>` ioctl. 55 56This ioctl tries a decoder command. The ``video_command`` struct is a 57subset of the ``v4l2_decoder_cmd`` struct, so refer to the 58:ref:`VIDIOC_TRY_DECODER_CMD <VIDIOC_DECODER_CMD>` documentation 59for more information. 60 61Return Value 62------------ 63 64On success 0 is returned, on error -1 and the ``errno`` variable is set 65appropriately. The generic error codes are described at the 66:ref:`Generic Error Codes <gen-errors>` chapter.