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libcamera: controls: Improve documentation for ExposureTime and AnalogueGain

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Setting these controls "fixes" them and the AE may not change them;
setting them back to zero returns them to the control of the AE
algorithm.

Signed-off-by: David Plowman <david.plowman@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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David Plowman 2020-12-01 17:55:35 +00:00 • committed by Laurent Pinchart
parent 472d3d3cdb
commit 6e2bbe2e2c
1 changed files with 20 additions and 0 deletions
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20
src/libcamera/control_ids.yaml
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@ -125,8 +125,18 @@ controls:
Exposure time (shutter speed) for the frame applied in the sensor
device. This value is specified in micro-seconds.
Setting this value means that it is now fixed and the AE algorithm may
not change it. Setting it back to zero returns it to the control of the
AE algorithm.
\sa AnalogueGain AeEnable
\todo Document the interactions between AeEnable and setting a fixed
value for this control. Consider interactions with other AE features,
such as aperture and aperture/shutter priority mode, and decide if
control of which features should be automatically adjusted shouldn't
better be handled through a separate AE mode control.
- AnalogueGain:
type: float
description: |
@ -134,8 +144,18 @@ controls:
The value of the control specifies the gain multiplier applied to all
colour channels. This value cannot be lower than 1.0.
Setting this value means that it is now fixed and the AE algorithm may
not change it. Setting it back to zero returns it to the control of the
AE algorithm.
\sa ExposureTime AeEnable
\todo Document the interactions between AeEnable and setting a fixed
value for this control. Consider interactions with other AE features,
such as aperture and aperture/shutter priority mode, and decide if
control of which features should be automatically adjusted shouldn't
better be handled through a separate AE mode control.
- Brightness:
type: float
description: |