ipa: ipu3: Introduce a modular contrast algorithmipu3/modules

Implement a new modular framework for algorithms with a common context
structure that is passed to each algorithm through a common API.

The initial algorithm is chosen to configure the gamma contrast curve
which replicates the implementation from AWB for simplicity.

Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/src/ipa/ipu3/algorithms/contrast.h b/src/ipa/ipu3/algorithms/contrast.h
new file mode 100644
index 00000000..cd1b0060
--- /dev/null
+++ b/src/ipa/ipu3/algorithms/contrast.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2021, Google
+ *
+ * constrast.h - IPU3 Contrast and Gamma control
+ */
+#ifndef __LIBCAMERA_IPU3_ALGORITHMS_CONTRAST_H__
+#define __LIBCAMERA_IPU3_ALGORITHMS_CONTRAST_H__
+
+#include "algorithm.h"
+
+namespace libcamera {
+
+namespace ipa::ipu3::algorithms {
+
+class Contrast : public Algorithm
+{
+public:
+	Contrast();
+	~Contrast() = default;
+
+	void initialise(IPAContext &context);
+
+private:
+	double gamma_;
+};
+
+} /* namespace ipa::ipu3::algorithms */
+
+} /* namespace libcamera */
+
+#endif /* __LIBCAMERA_IPU3_ALGORITHMS_CONTRAST_H__ */