58 lines
2.0 KiB
ReStructuredText
58 lines
2.0 KiB
ReStructuredText
|
.. Permission is granted to copy, distribute and/or modify this
|
||
|
|
.. document under the terms of the GNU Free Documentation License,
|
||
|
|
.. Version 1.1 or any later version published by the Free Software
|
||
|
|
.. Foundation, with no Invariant Sections, no Front-Cover Texts
|
||
|
|
.. and no Back-Cover Texts. A copy of the license is included at
|
||
|
|
.. Documentation/media/uapi/fdl-appendix.rst.
|
||
|
|
..
|
||
|
|
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
|
||
|
|
|
||
|
|
.. _image-source-controls:
|
||
|
|
|
||
|
|
******************************
|
||
|
|
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.
|
||
|
|
|
||
|
|
|
||
|
|
.. _image-source-control-id:
|
||
|
|
|
||
|
|
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.
|