3 files changed, 51 insertions, 0 deletions
diff --git a/include/libcamera/internal/meson.build b/include/libcamera/internal/meson.build
index 5807dfd9..160fdc37 100644
--- a/include/libcamera/internal/meson.build
+++ b/include/libcamera/internal/meson.build
@@ -50,3 +50,4 @@ libcamera_internal_headers = files([
 ])
 
 subdir('converter')
+subdir('software_isp')
diff --git a/include/libcamera/internal/software_isp/meson.build b/include/libcamera/internal/software_isp/meson.build
new file mode 100644
index 00000000..66c9c3fb
--- /dev/null
+++ b/include/libcamera/internal/software_isp/meson.build
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: CC0-1.0
+
+libcamera_internal_headers += files([
+    'swisp_stats.h',
+])
diff --git a/include/libcamera/internal/software_isp/swisp_stats.h b/include/libcamera/internal/software_isp/swisp_stats.h
new file mode 100644
index 00000000..dd5e207d
--- /dev/null
+++ b/include/libcamera/internal/software_isp/swisp_stats.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2023, Linaro Ltd
+ *
+ * swisp_stats.h - Statistics data format used by the software ISP and software IPA
+ */
+
+#pragma once
+
+#include <array>
+#include <stdint.h>
+
+namespace libcamera {
+
+/**
+ * \brief Struct that holds the statistics for the Software ISP
+ *
+ * The struct value types are large enough to not overflow.
+ * Should they still overflow for some reason, no check is performed and they
+ * wrap around.
+ */
+struct SwIspStats {
+	/**
+	 * \brief Holds the sum of all sampled red pixels
+	 */
+	uint64_t sumR_;
+	/**
+	 * \brief Holds the sum of all sampled green pixels
+	 */
+	uint64_t sumG_;
+	/**
+	 * \brief Holds the sum of all sampled blue pixels
+	 */
+	uint64_t sumB_;
+	/**
+	 * \brief Number of bins in the yHistogram
+	 */
+	static constexpr unsigned int kYHistogramSize = 16;
+	/**
+	 * \brief A histogram of luminance values
+	 */
+	std::array<uint32_t, kYHistogramSize> yHistogram;
+};
+
+} /* namespace libcamera */