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The AwbStats structure has virtual functions but a publicly accessible
non-virtual destructors. This can cause undefined behaviour if deleting
a derived class instance through a pointer to the base AwbStats class.
The problem is theoretical only as no code in libcamera is expected to
perform such deletion, but compilers can't know that and will emit a
warning if the -Wnon-virtual-dtor option is enabled.
Fixing this can be done by declaring a virtual public destructor in the
AwbStats class. A more efficient alternative is to declare a protected
non-virtual destructor, ensuring that instances can't be deleted through
a pointer to the base class. Do so, and mark the derived RkISP1AwbStats
as final to avoid the same warning.
Fixes: 6f663990a0f7 ("libipa: Add AWB algorithm base class")
Reported-by: Milan Zamazal <mzamazal@redhat.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Tested-by: Milan Zamazal <mzamazal@redhat.com>
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The convention in libcamera is not to prefix getters with a 'get'
prefix. Rename the AwbStats::getRGBMeans() function accordingly.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
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The lux value can never be negative. Pass it as an unsigned int.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
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The AWB modes are specified in the libcamera core controls. It is
therefore quite likely that every AWB algorithm will implement them. Add
helper functions for parsing and storing the configured modes in the
AwbAlgorithm base class.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
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Add a class to provide a generic interface for auto white balance
algorithms. Concrete AWB algorithms are expected to subclass the
AwbAlgorithm class to implement their functionality.
IPAs are expected to subclass the AwbStats class and implement the
necessary functions to give the algorithm access to the hardware
specific statistics data.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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