Paul Elder cfdc281100 libcamera: control_serializer: Add array info to serialized ControlValue ...

Array controls (eg. ColourCorrectionMatrix, FrameDurationLimits,
ColourGains) are serialized properly by the ControlSerializer, but are
not deserialized properly. This is because their arrayness and size are
not considered during deserialization.

Fix this by adding arrayness and size to the serialized form of all
ControlValues. This is achieved by fully serializing the min/max/def
ControlValue's metadata associated with each ControlInfo entry in the
ControlInfoMap.

While at it, clean up the serialization format of ControlValues and
ControlLists:
- ControlValue's id is only used by ControlList, so add a new struct for
  ControlList entries to contain it, and remove id from ControlValue
- Remove offset from ControlInfo's entry, as it is no longer needed,
  since the serialized data of a ControlInfo has now been converted to
  simply three serialized ControlValues
- Remove the type from the serialized data of ControlValue, as it is
  already in the metadata entry

The issue regarding array controls was not noticed before because the
default value of the ControlInfo of other array controls had been set to
scalar values similar to how min/max are set, and ColourCorrectionMatrix
was the first control to properly define a non-scalar default value.

Bug: https://bugs.libcamera.org/show_bug.cgi?id=285
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Tested-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com> # rkisp1
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

2025-11-26 16:52:19 +00:00

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