From b1439c87d118776274296ef07136919a693e73fc Mon Sep 17 00:00:00 2001
From: Daniel Scally <dan.scally@ideasonboard.com>
Date: Fri, 15 Nov 2024 07:46:23 +0000
Subject: ipa: libipa: Add colour helpers

We start to have some functions relating to colour that are
effectively identical crop up across the IPA modules. Add a file
allowing those to be centralised within libipa so that a single
implementation can be used in all of the IPAs.

Signed-off-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 src/ipa/libipa/colours.h | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 src/ipa/libipa/colours.h

(limited to 'src/ipa/libipa/colours.h')

diff --git a/src/ipa/libipa/colours.h b/src/ipa/libipa/colours.h
new file mode 100644
index 00000000..b42ed0ac
--- /dev/null
+++ b/src/ipa/libipa/colours.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (C) 2024, Ideas on Board Oy
+ *
+ * libipa miscellaneous colour helpers
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+namespace libcamera {
+
+namespace ipa {
+
+double rec601LuminanceFromRGB(double r, double g, double b);
+uint32_t estimateCCT(double red, double green, double blue);
+
+} /* namespace ipa */
+
+} /* namespace libcamera */
-- 
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