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libcamera: controls: Add DigitalGain control

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This control reports the global digital gain applied by the pipeline
as a whole, after capturing a raw image from the sensor.

Signed-off-by: David Plowman <david.plowman@raspberrypi.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
David Plowman
2020-11-26 14:50:04 +00:00
committed by Laurent Pinchart
parent bcbd9fed8f
commit b4d21c62d1
1 changed files with 17 additions and 0 deletions
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17
src/libcamera/control_ids.yaml
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@@ -306,6 +306,23 @@ controls:
maximum valid value is given by the properties::ScalerCropMaximum
property, and the two can be used to implement digital zoom.
- DigitalGain:
type: float
description: |
Digital gain value applied during the processing steps applied
to the image as captured from the sensor.
The global digital gain factor is applied to all the colour channels
of the RAW image. Different pipeline models are free to
specify how the global gain factor applies to each separate
channel.
If an imaging pipeline applies digital gain in distinct
processing steps, this value indicates their total sum.
Pipelines are free to decide how to adjust each processing
step to respect the received gain factor and shall report
their total value in the request metadata.
# ----------------------------------------------------------------------------
# Draft controls section