summaryrefslogtreecommitdiff
path: root/include/libcamera/internal/media_object.h
blob: 2f5d33e1903eabca36162f492b8f85113aff829c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
/* 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_INTERNAL_MEDIA_OBJECT_H__
#define __LIBCAMERA_INTERNAL_MEDIA_OBJECT_H__

#include <string>
#include <vector>

#include <linux/media.h>

#include <libcamera/base/class.h>

namespace libcamera {

class MediaDevice;
class MediaEntity;
class MediaPad;

class MediaObject
{
public:
	MediaDevice *device() { return dev_; }
	const MediaDevice *device() const { return dev_; }
	unsigned int id() const { return id_; }

protected:
	friend class MediaDevice;

	MediaObject(MediaDevice *dev, unsigned int id)
		: dev_(dev), id_(id)
	{
	}
	virtual ~MediaObject() = default;

	MediaDevice *dev_;
	unsigned int id_;
};

class MediaLink : public MediaObject
{
public:
	MediaPad *source() const { return source_; }
	MediaPad *sink() const { return sink_; }
	unsigned int flags() const { return flags_; }
	int setEnabled(bool enable);

private:
	LIBCAMERA_DISABLE_COPY_AND_MOVE(MediaLink)

	friend class MediaDevice;

	MediaLink(const struct media_v2_link *link,
		  MediaPad *source, MediaPad *sink);

	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:
	LIBCAMERA_DISABLE_COPY_AND_MOVE(MediaPad)

	friend class MediaDevice;

	MediaPad(const struct media_v2_pad *pad, MediaEntity *entity);

	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 function() const { return function_; }
	unsigned int flags() const { return flags_; }
	const std::string &deviceNode() const { return deviceNode_; }
	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 &deviceNode);

private:
	LIBCAMERA_DISABLE_COPY_AND_MOVE(MediaEntity)

	friend class MediaDevice;

	MediaEntity(MediaDevice *dev, const struct media_v2_entity *entity,
		    unsigned int major = 0, unsigned int minor = 0);

	void addPad(MediaPad *pad);

	std::string name_;
	unsigned int function_;
	unsigned int flags_;
	std::string deviceNode_;
	unsigned int major_;
	unsigned int minor_;

	std::vector<MediaPad *> pads_;
};

} /* namespace libcamera */

#endif /* __LIBCAMERA_INTERNAL_MEDIA_OBJECT_H__ */