1 files changed, 60 insertions, 0 deletions
diff --git a/include/libcamera/internal/v4l2_device.h b/include/libcamera/internal/v4l2_device.h
new file mode 100644
index 00000000..d491eafd
--- /dev/null
+++ b/include/libcamera/internal/v4l2_device.h
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * v4l2_device.h - Common base for V4L2 video devices and subdevices
+ */
+#ifndef __LIBCAMERA_V4L2_DEVICE_H__
+#define __LIBCAMERA_V4L2_DEVICE_H__
+
+#include <map>
+#include <memory>
+#include <vector>
+
+#include <linux/videodev2.h>
+
+#include "libcamera/internal/log.h"
+#include "libcamera/internal/v4l2_controls.h"
+
+namespace libcamera {
+
+class V4L2Device : protected Loggable
+{
+public:
+	void close();
+	bool isOpen() const { return fd_ != -1; }
+
+	const ControlInfoMap &controls() const { return controls_; }
+
+	ControlList getControls(const std::vector<uint32_t> &ids);
+	int setControls(ControlList *ctrls);
+
+	const std::string &deviceNode() const { return deviceNode_; }
+
+protected:
+	V4L2Device(const std::string &deviceNode);
+	~V4L2Device();
+
+	int open(unsigned int flags);
+	int setFd(int fd);
+
+	int ioctl(unsigned long request, void *argp);
+
+	int fd() { return fd_; }
+
+private:
+	void listControls();
+	void updateControls(ControlList *ctrls,
+			    const struct v4l2_ext_control *v4l2Ctrls,
+			    unsigned int count);
+
+	std::map<unsigned int, struct v4l2_query_ext_ctrl> controlInfo_;
+	std::vector<std::unique_ptr<V4L2ControlId>> controlIds_;
+	ControlInfoMap controls_;
+	std::string deviceNode_;
+	int fd_;
+};
+
+} /* namespace libcamera */
+
+#endif /* __LIBCAMERA_V4L2_DEVICE_H__ */