ioctl VIDIOC_DQEVENT

&manvol;

VIDIOC_DQEVENT

Dequeue event

    	int ioctl
    	int fd
    	int request
    	struct v4l2_event
    *argp

## Arguments

`fd`

- &fd;

`request`

- VIDIOC_DQEVENT

`argp`

## Description

Dequeue an event from a video device. No input is required for this ioctl. All the fields of the &v4l2-event; structure are filled by the driver. The file handle will also receive exceptions which the application may get by e.g. using the select system call.

## struct v4l2_event

&cs-str;
__u32 | type |  | Type of the event.
union | u |  |
| &v4l2-event-vsync; | vsync | Event data for event V4L2_EVENT_VSYNC.
| __u8 | data[64] | Event data. Defined by the event type. The union should be used to define easily accessible type for events.
__u32 | pending |  | Number of pending events excluding this one.
__u32 | sequence |  | Event sequence number. The sequence number is incremented for every subscribed event that takes place. If sequence numbers are not contiguous it means that events have been lost.
struct timespec | timestamp |  | Event timestamp.
__u32 | reserved[9] |  | Reserved for future extensions. Drivers must set the array to zero.