8.1.1. Selection targets

The precise meaning of the selection targets may be dependent on which of the two interfaces they are used.

Selection target definitions

Target name

id

Definition

Valid for V4L2

Valid for V4L2 subdev

V4L2_SEL_TGT_CROP

0x0000

Crop rectangle. Defines the cropped area.

Yes

Yes

V4L2_SEL_TGT_CROP_DEFAULT

0x0001

Suggested cropping rectangle that covers the “whole picture”. This includes only active pixels and excludes other non-active pixels such as black pixels.

Yes

Yes

V4L2_SEL_TGT_CROP_BOUNDS

0x0002

Bounds of the crop rectangle. All valid crop rectangles fit inside the crop bounds rectangle.

Yes

Yes

V4L2_SEL_TGT_NATIVE_SIZE

0x0003

The native size of the device, e.g. a sensor’s pixel array. left and top fields are zero for this target.

Yes

Yes

V4L2_SEL_TGT_COMPOSE

0x0100

Compose rectangle. Used to configure scaling and composition.

Yes

Yes

V4L2_SEL_TGT_COMPOSE_DEFAULT

0x0101

Suggested composition rectangle that covers the “whole picture”.

Yes

No

V4L2_SEL_TGT_COMPOSE_BOUNDS

0x0102

Bounds of the compose rectangle. All valid compose rectangles fit inside the compose bounds rectangle.

Yes

Yes

V4L2_SEL_TGT_COMPOSE_PADDED

0x0103

The active area and all padding pixels that are inserted or modified by hardware.

Yes

No