1 files changed, 94 insertions, 0 deletions
diff --git a/include/libcamera/internal/media_device.h b/include/libcamera/internal/media_device.h
new file mode 100644
index 00000000..9fe76c51
--- /dev/null
+++ b/include/libcamera/internal/media_device.h
@@ -0,0 +1,94 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2018, Google Inc.
+ *
+ * media_device.h - Media device handler
+ */
+#ifndef __LIBCAMERA_MEDIA_DEVICE_H__
+#define __LIBCAMERA_MEDIA_DEVICE_H__
+
+#include <map>
+#include <sstream>
+#include <string>
+#include <vector>
+
+#include <linux/media.h>
+
+#include <libcamera/signal.h>
+
+#include "libcamera/internal/log.h"
+#include "libcamera/internal/media_object.h"
+
+namespace libcamera {
+
+class MediaDevice : protected Loggable
+{
+public:
+	MediaDevice(const std::string &deviceNode);
+	~MediaDevice();
+
+	bool acquire();
+	void release();
+	bool busy() const { return acquired_; }
+
+	bool lock();
+	void unlock();
+
+	int populate();
+	bool valid() const { return valid_; }
+
+	const std::string driver() const { return driver_; }
+	const std::string deviceNode() const { return deviceNode_; }
+	const std::string model() const { return model_; }
+	unsigned int version() const { return version_; }
+
+	const std::vector<MediaEntity *> &entities() const { return entities_; }
+	MediaEntity *getEntityByName(const std::string &name) const;
+
+	MediaLink *link(const std::string &sourceName, unsigned int sourceIdx,
+			const std::string &sinkName, unsigned int sinkIdx);
+	MediaLink *link(const MediaEntity *source, unsigned int sourceIdx,
+			const MediaEntity *sink, unsigned int sinkIdx);
+	MediaLink *link(const MediaPad *source, const MediaPad *sink);
+	int disableLinks();
+
+	Signal<MediaDevice *> disconnected;
+
+protected:
+	std::string logPrefix() const;
+
+private:
+	std::string driver_;
+	std::string deviceNode_;
+	std::string model_;
+	unsigned int version_;
+
+	int fd_;
+	bool valid_;
+	bool acquired_;
+	bool lockOwner_;
+
+	int open();
+	void close();
+
+	std::map<unsigned int, MediaObject *> objects_;
+	MediaObject *object(unsigned int id);
+	bool addObject(MediaObject *object);
+	void clear();
+
+	std::vector<MediaEntity *> entities_;
+
+	struct media_v2_interface *findInterface(const struct media_v2_topology &topology,
+						 unsigned int entityId);
+	bool populateEntities(const struct media_v2_topology &topology);
+	bool populatePads(const struct media_v2_topology &topology);
+	bool populateLinks(const struct media_v2_topology &topology);
+	void fixupEntityFlags(struct media_v2_entity *entity);
+
+	friend int MediaLink::setEnabled(bool enable);
+	int setupLink(const MediaLink *link, unsigned int flags);
+};
+
+} /* namespace libcamera */
+
+#endif /* __LIBCAMERA_MEDIA_DEVICE_H__ */