ipa: rkisp1: awb: Load white balance gains from tuning file

For the implementation of a manual colour temperature setting, it is
necessary to read predefined colour gains per colour temperature from
the tuning file. Implement this in a backwards compatible way. If no
gains are contained in the tuning file, loading just continues as
before.

Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/ipa/rkisp1/algorithms/awb.h b/src/ipa/rkisp1/algorithms/awb.h
index 6ac3a5c3..e4248048 100644
--- a/src/ipa/rkisp1/algorithms/awb.h
+++ b/src/ipa/rkisp1/algorithms/awb.h
@@ -7,6 +7,11 @@
 
 #pragma once
 
+#include <optional>
+
+#include "libipa/interpolator.h"
+#include "libipa/vector.h"
+
 #include "algorithm.h"
 
 namespace libcamera {
@@ -19,6 +24,7 @@ public:
 	Awb();
 	~Awb() = default;
 
+	int init(IPAContext &context, const YamlObject &tuningData) override;
 	int configure(IPAContext &context, const IPACameraSensorInfo &configInfo) override;
 	void queueRequest(IPAContext &context, const uint32_t frame,
 			  IPAFrameContext &frameContext,
@@ -32,6 +38,7 @@ public:
 		     ControlList &metadata) override;
 
 private:
+	std::optional<Interpolator<Vector<double, 2>>> colourGainCurve_;
 	bool rgbMode_;
 };