1.. Permission is granted to copy, distribute and/or modify this
2.. document under the terms of the GNU Free Documentation License,
3.. Version 1.1 or any later version published by the Free Software
4.. Foundation, with no Invariant Sections, no Front-Cover Texts
5.. and no Back-Cover Texts. A copy of the license is included at
6.. Documentation/media/uapi/fdl-appendix.rst.
7..
8.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
9
10.. _image-source-controls:
11
12******************************
13Image Source Control Reference
14******************************
15
16The Image Source control class is intended for low-level control of
17image source devices such as image sensors. The devices feature an
18analogue to digital converter and a bus transmitter to transmit the
19image data out of the device.
20
21
22.. _image-source-control-id:
23
24Image Source Control IDs
25========================
26
27``V4L2_CID_IMAGE_SOURCE_CLASS (class)``
28    The IMAGE_SOURCE class descriptor.
29
30``V4L2_CID_VBLANK (integer)``
31    Vertical blanking. The idle period after every frame during which no
32    image data is produced. The unit of vertical blanking is a line.
33    Every line has length of the image width plus horizontal blanking at
34    the pixel rate defined by ``V4L2_CID_PIXEL_RATE`` control in the
35    same sub-device.
36
37``V4L2_CID_HBLANK (integer)``
38    Horizontal blanking. The idle period after every line of image data
39    during which no image data is produced. The unit of horizontal
40    blanking is pixels.
41
42``V4L2_CID_ANALOGUE_GAIN (integer)``
43    Analogue gain is gain affecting all colour components in the pixel
44    matrix. The gain operation is performed in the analogue domain
45    before A/D conversion.
46
47``V4L2_CID_TEST_PATTERN_RED (integer)``
48    Test pattern red colour component.
49
50``V4L2_CID_TEST_PATTERN_GREENR (integer)``
51    Test pattern green (next to red) colour component.
52
53``V4L2_CID_TEST_PATTERN_BLUE (integer)``
54    Test pattern blue colour component.
55
56``V4L2_CID_TEST_PATTERN_GREENB (integer)``
57    Test pattern green (next to blue) colour component.
58