1.13. Image Source Control Reference

The Image Source control class is intended for low-level control of image source devices such as image sensors. The devices feature an analogue to digital converter and a bus transmitter to transmit the image data out of the device.

1.13.1. Image Source Control IDs

V4L2_CID_IMAGE_SOURCE_CLASS (class)

The IMAGE_SOURCE class descriptor.

V4L2_CID_VBLANK (integer)

Vertical blanking. The idle period after every frame during which no image data is produced. The unit of vertical blanking is a line. Every line has length of the image width plus horizontal blanking at the pixel rate defined by V4L2_CID_PIXEL_RATE control in the same sub-device.

V4L2_CID_HBLANK (integer)

Horizontal blanking. The idle period after every line of image data during which no image data is produced. The unit of horizontal blanking is pixels.

V4L2_CID_ANALOGUE_GAIN (integer)

Analogue gain is gain affecting all colour components in the pixel matrix. The gain operation is performed in the analogue domain before A/D conversion.

V4L2_CID_TEST_PATTERN_RED (integer)

Test pattern red colour component.

V4L2_CID_TEST_PATTERN_GREENR (integer)

Test pattern green (next to red) colour component.

V4L2_CID_TEST_PATTERN_BLUE (integer)

Test pattern blue colour component.

V4L2_CID_TEST_PATTERN_GREENB (integer)

Test pattern green (next to blue) colour component.