| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 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 | ****************************** |
| 13 | Image Source Control Reference |
| 14 | ****************************** |
| 15 | |
| 16 | The Image Source control class is intended for low-level control of |
| 17 | image source devices such as image sensors. The devices feature an |
| 18 | analogue to digital converter and a bus transmitter to transmit the |
| 19 | image data out of the device. |
| 20 | |
| 21 | |
| 22 | .. _image-source-control-id: |
| 23 | |
| 24 | Image 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. |