.. -*- coding: utf-8; mode: rst -*- .. _VIDEO_COMMAND: ============= VIDEO_COMMAND ============= Name ---- VIDEO_COMMAND .. attention:: This ioctl is deprecated. Synopsis -------- .. c:function:: int ioctl(int fd, VIDEO_COMMAND, struct video_command *cmd) :name: VIDEO_COMMAND Arguments --------- .. flat-table:: :header-rows: 0 :stub-columns: 0 - .. row 1 - int fd - File descriptor returned by a previous call to open(). - .. row 2 - int request - Equals VIDEO_COMMAND for this command. - .. row 3 - struct video_command \*cmd - Commands the decoder. Description ----------- This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders this ioctl has been replaced by the :ref:`VIDIOC_DECODER_CMD` ioctl. This ioctl commands the decoder. The ``video_command`` struct is a subset of the ``v4l2_decoder_cmd`` struct, so refer to the :ref:`VIDIOC_DECODER_CMD` documentation for more information. .. c:type:: struct video_command .. code-block:: c /* The structure must be zeroed before use by the application This ensures it can be extended safely in the future. */ struct video_command { __u32 cmd; __u32 flags; union { struct { __u64 pts; } stop; struct { /* 0 or 1000 specifies normal speed, 1 specifies forward single stepping, -1 specifies backward single stepping, >1: playback at speed/1000 of the normal speed, <-1: reverse playback at (-speed/1000) of the normal speed. */ __s32 speed; __u32 format; } play; struct { __u32 data[16]; } raw; }; }; Return Value ------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the :ref:`Generic Error Codes ` chapter.