libcamera: ipa: Raspberry Pi IPA

Initial implementation of the Raspberry Pi (BCM2835) libcamera IPA and
associated libraries.

All code is licensed under the BSD-2-Clause terms.
Copyright (c) 2019-2020 Raspberry Pi Trading Ltd.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/ipa/raspberrypi/controller/black_level_status.h

@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (C) 2019, Raspberry Pi (Trading) Limited
+ *
+ * black_level_status.h - black level control algorithm status
+ */
+#pragma once
+
+// The "black level" algorithm stores the black levels to use.
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct BlackLevelStatus {
+	uint16_t black_level_r; // out of 16 bits
+	uint16_t black_level_g;
+	uint16_t black_level_b;
+};
+
+#ifdef __cplusplus
+}
+#endif