libcamera: camera_sensor: Add a new class to model a camera sensor

The CameraSensor class abstracts camera sensors and provides helper functions to ease interactions with them. It is currently limited to sensors that expose a single subdev, and offer the same frame sizes for all media bus codes, but will be extended to support more complex sensors as the needs arise. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
2019-04-18 18:13:17 +03:00
parent 05b0e5ed53
commit 7645083c72
3 changed files with 316 additions and 0 deletions
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * camera_sensor.h - A camera sensor
+ */
+#ifndef __LIBCAMERA_CAMERA_SENSOR_H__
+#define __LIBCAMERA_CAMERA_SENSOR_H__
+
+#include <string>
+#include <vector>
+
+#include <libcamera/geometry.h>
+
+#include "log.h"
+
+namespace libcamera {
+
+class MediaEntity;
+class V4L2Subdevice;
+class V4L2SubdeviceFormat;
+
+class CameraSensor : protected Loggable
+{
+public:
+	explicit CameraSensor(const MediaEntity *entity);
+	~CameraSensor();
+
+	CameraSensor(const CameraSensor &) = delete;
+	CameraSensor &operator=(const CameraSensor &) = delete;
+
+	int init();
+
+	const MediaEntity *entity() const { return entity_; }
+	const std::vector<unsigned int> &mbusCodes() const { return mbusCodes_; }
+	const std::vector<Size> &sizes() const { return sizes_; }
+	const Size &resolution() const;
+
+	V4L2SubdeviceFormat getFormat(const std::vector<unsigned int> &mbusCodes,
+				      const Size &size) const;
+	int setFormat(V4L2SubdeviceFormat *format);
+
+protected:
+	std::string logPrefix() const;
+
+private:
+	const MediaEntity *entity_;
+	V4L2Subdevice *subdev_;
+
+	std::vector<unsigned int> mbusCodes_;
+	std::vector<Size> sizes_;
+};
+
+} /* namespace libcamera */
+
+#endif /* __LIBCAMERA_CAMERA_SENSOR_H__ */