libcamera: Add BayerFormat type

This type encodes BayerFormats in an explicit way, that makes them easier to use than some of the other more opaque type formats. This makes the BayerFormat useful for editing or manipulating Bayer types more easily. Signed-off-by: David Plowman <david.plowman@raspberrypi.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2020-09-07 08:15:59 +01:00
parent edf19e4c72
commit 78cbd6a93f
3 changed files with 330 additions and 0 deletions
@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2020, Raspberry Pi (Trading) Ltd.
+ *
+ * bayer_format.h - Bayer Pixel Format
+ */
+#ifndef __LIBCAMERA_INTERNAL_BAYER_FORMAT_H__
+#define __LIBCAMERA_INTERNAL_BAYER_FORMAT_H__
+
+#include <stdint.h>
+#include <string>
+
+#include "libcamera/internal/v4l2_pixelformat.h"
+
+namespace libcamera {
+
+enum class Transform;
+
+class BayerFormat
+{
+public:
+	enum Order : uint8_t {
+		BGGR = 0,
+		GBRG = 1,
+		GRBG = 2,
+		RGGB = 3
+	};
+
+	enum Packing : uint16_t {
+		None = 0,
+		CSI2Packed = 1,
+		IPU3Packed = 2,
+	};
+
+	constexpr BayerFormat()
+		: order(Order::BGGR), bitDepth(0), packing(Packing::None)
+	{
+	}
+
+	constexpr BayerFormat(Order o, uint8_t b, Packing p)
+		: order(o), bitDepth(b), packing(p)
+	{
+	}
+
+	explicit BayerFormat(V4L2PixelFormat v4l2Format);
+	bool isValid() const { return bitDepth != 0; }
+
+	std::string toString() const;
+
+	V4L2PixelFormat toV4L2PixelFormat() const;
+	BayerFormat transform(Transform t) const;
+
+	Order order;
+	uint8_t bitDepth;
+
+	Packing packing;
+};
+
+} /* namespace libcamera */
+
+#endif /* __LIBCAMERA_INTERNAL_BAYER_FORMAT_H__ */