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58 lines
2.0 KiB
ReStructuredText
.. Permission is granted to copy, distribute and/or modify this
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.. document under the terms of the GNU Free Documentation License,
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.. Version 1.1 or any later version published by the Free Software
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.. Foundation, with no Invariant Sections, no Front-Cover Texts
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.. and no Back-Cover Texts. A copy of the license is included at
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.. Documentation/media/uapi/fdl-appendix.rst.
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..
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.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
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.. _image-source-controls:
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******************************
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Image Source Control Reference
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******************************
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The Image Source control class is intended for low-level control of
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image source devices such as image sensors. The devices feature an
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analogue to digital converter and a bus transmitter to transmit the
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image data out of the device.
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.. _image-source-control-id:
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Image Source Control IDs
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========================
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``V4L2_CID_IMAGE_SOURCE_CLASS (class)``
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The IMAGE_SOURCE class descriptor.
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``V4L2_CID_VBLANK (integer)``
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Vertical blanking. The idle period after every frame during which no
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image data is produced. The unit of vertical blanking is a line.
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Every line has length of the image width plus horizontal blanking at
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the pixel rate defined by ``V4L2_CID_PIXEL_RATE`` control in the
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same sub-device.
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``V4L2_CID_HBLANK (integer)``
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Horizontal blanking. The idle period after every line of image data
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during which no image data is produced. The unit of horizontal
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blanking is pixels.
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``V4L2_CID_ANALOGUE_GAIN (integer)``
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Analogue gain is gain affecting all colour components in the pixel
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matrix. The gain operation is performed in the analogue domain
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before A/D conversion.
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``V4L2_CID_TEST_PATTERN_RED (integer)``
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Test pattern red colour component.
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``V4L2_CID_TEST_PATTERN_GREENR (integer)``
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Test pattern green (next to red) colour component.
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``V4L2_CID_TEST_PATTERN_BLUE (integer)``
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Test pattern blue colour component.
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``V4L2_CID_TEST_PATTERN_GREENB (integer)``
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Test pattern green (next to blue) colour component.
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