int fd | File descriptor returned by a previous call to open(). |
int request | Equals VIDEO_TRY_COMMAND for this command. |
struct video_command *cmd | Try a decoder command. |
This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders this ioctl has been replaced by the VIDIOC_TRY_DECODER_CMD ioctl.
This ioctl tries a decoder command. The video_command struct is a subset of the v4l2_decoder_cmd struct, so refer to the VIDIOC_TRY_DECODER_CMD documentation for more information.
On success 0 is returned, on error -1 and the errno variable is set appropriately. The generic error codes are described at the Generic Error Codes chapter.