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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2018, Google Inc.
*
* media_object.h - Media Device objects: entities, pads and links.
*/
#ifndef __LIBCAMERA_MEDIA_OBJECT_H__
#define __LIBCAMERA_MEDIA_OBJECT_H__
#include <string>
#include <vector>
#include <linux/media.h>
namespace libcamera {
class MediaDevice;
class MediaEntity;
class MediaPad;
class MediaObject
{
public:
unsigned int id() const { return id_; }
protected:
friend class MediaDevice;
MediaObject(unsigned int id) : id_(id) { }
virtual ~MediaObject() { }
unsigned int id_;
};
class MediaLink : public MediaObject
{
public:
MediaPad *source() const { return source_; }
MediaPad *sink() const { return sink_; }
unsigned int flags() const { return flags_; }
private:
friend class MediaDevice;
MediaLink(const struct media_v2_link *link,
MediaPad *source, MediaPad *sink);
MediaLink(const MediaLink &) = delete;
~MediaLink() { }
MediaPad *source_;
MediaPad *sink_;
unsigned int flags_;
};
class MediaPad : public MediaObject
{
public:
unsigned int index() const { return index_; }
MediaEntity *entity() const { return entity_; }
unsigned int flags() const { return flags_; }
const std::vector<MediaLink *> &links() const { return links_; }
void addLink(MediaLink *link);
private:
friend class MediaDevice;
MediaPad(const struct media_v2_pad *pad, MediaEntity *entity);
MediaPad(const MediaPad &) = delete;
~MediaPad();
unsigned int index_;
MediaEntity *entity_;
unsigned int flags_;
std::vector<MediaLink *> links_;
};
class MediaEntity : public MediaObject
{
public:
const std::string &name() const { return name_; }
unsigned int deviceMajor() const { return major_; }
unsigned int deviceMinor() const { return minor_; }
const std::vector<MediaPad *> &pads() const { return pads_; }
const MediaPad *getPadByIndex(unsigned int index) const;
const MediaPad *getPadById(unsigned int id) const;
int setDeviceNode(const std::string &devnode);
private:
friend class MediaDevice;
MediaEntity(const struct media_v2_entity *entity,
unsigned int major = 0, unsigned int minor = 0);
MediaEntity(const MediaEntity &) = delete;
~MediaEntity();
std::string name_;
std::string devnode_;
unsigned int major_;
unsigned int minor_;
std::vector<MediaPad *> pads_;
void addPad(MediaPad *pad);
};
} /* namespace libcamera */
#endif /* __LIBCAMERA_MEDIA_OBJECT_H__ */
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