1 files changed, 75 insertions, 0 deletions
diff --git a/include/libcamera/internal/device_enumerator_udev.h b/include/libcamera/internal/device_enumerator_udev.h
new file mode 100644
index 00000000..fdaa2096
--- /dev/null
+++ b/include/libcamera/internal/device_enumerator_udev.h
@@ -0,0 +1,75 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2018-2019, Google Inc.
+ *
+ * device_enumerator_udev.h - udev-based device enumerator
+ */
+#ifndef __LIBCAMERA_DEVICE_ENUMERATOR_UDEV_H__
+#define __LIBCAMERA_DEVICE_ENUMERATOR_UDEV_H__
+
+#include <list>
+#include <map>
+#include <memory>
+#include <set>
+#include <string>
+#include <sys/types.h>
+
+#include "libcamera/internal/device_enumerator.h"
+
+struct udev;
+struct udev_device;
+struct udev_monitor;
+
+namespace libcamera {
+
+class EventNotifier;
+class MediaDevice;
+class MediaEntity;
+
+class DeviceEnumeratorUdev : public DeviceEnumerator
+{
+public:
+	DeviceEnumeratorUdev();
+	~DeviceEnumeratorUdev();
+
+	int init() final;
+	int enumerate() final;
+
+private:
+	struct udev *udev_;
+	struct udev_monitor *monitor_;
+	EventNotifier *notifier_;
+
+	using DependencyMap = std::map<dev_t, std::list<MediaEntity *>>;
+
+	struct MediaDeviceDeps {
+		MediaDeviceDeps(std::unique_ptr<MediaDevice> &&media,
+				DependencyMap &&deps)
+			: media_(std::move(media)), deps_(std::move(deps))
+		{
+		}
+
+		bool operator==(const MediaDeviceDeps &other) const
+		{
+			return media_ == other.media_;
+		}
+
+		std::unique_ptr<MediaDevice> media_;
+		DependencyMap deps_;
+	};
+
+	std::set<dev_t> orphans_;
+	std::list<MediaDeviceDeps> pending_;
+	std::map<dev_t, MediaDeviceDeps *> devMap_;
+
+	int addUdevDevice(struct udev_device *dev);
+	int populateMediaDevice(MediaDevice *media, DependencyMap *deps);
+	std::string lookupDeviceNode(dev_t devnum);
+
+	int addV4L2Device(dev_t devnum);
+	void udevNotify(EventNotifier *notifier);
+};
+
+} /* namespace libcamera */
+
+#endif	/* __LIBCAMERA_DEVICE_ENUMERATOR_UDEV_H__ */