9490c664b5
With kernel support for ancillary links, we can describe the relationship between two devices represented individually as instances of MediaEntity. As the only property of that relationship is its existence, describe those relationships in libcamera simply as a vector of MediaEntity pointers to the ancillary devices. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Daniel Scally <djrscally@gmail.com> Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
139 lines
3.0 KiB
C++
139 lines
3.0 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2018, Google Inc.
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*
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* media_object.h - Media Device objects: entities, pads and links.
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*/
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#pragma once
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#include <string>
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#include <vector>
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#include <linux/media.h>
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#include <libcamera/base/class.h>
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namespace libcamera {
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class MediaDevice;
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class MediaEntity;
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class MediaPad;
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class MediaObject
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{
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public:
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MediaDevice *device() { return dev_; }
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const MediaDevice *device() const { return dev_; }
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unsigned int id() const { return id_; }
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protected:
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friend class MediaDevice;
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MediaObject(MediaDevice *dev, unsigned int id)
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: dev_(dev), id_(id)
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{
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}
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virtual ~MediaObject() = default;
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MediaDevice *dev_;
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unsigned int id_;
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};
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class MediaLink : public MediaObject
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{
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public:
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MediaPad *source() const { return source_; }
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MediaPad *sink() const { return sink_; }
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unsigned int flags() const { return flags_; }
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int setEnabled(bool enable);
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private:
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LIBCAMERA_DISABLE_COPY_AND_MOVE(MediaLink)
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friend class MediaDevice;
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MediaLink(const struct media_v2_link *link,
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MediaPad *source, MediaPad *sink);
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MediaPad *source_;
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MediaPad *sink_;
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unsigned int flags_;
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};
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class MediaPad : public MediaObject
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{
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public:
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unsigned int index() const { return index_; }
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MediaEntity *entity() const { return entity_; }
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unsigned int flags() const { return flags_; }
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const std::vector<MediaLink *> &links() const { return links_; }
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void addLink(MediaLink *link);
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private:
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LIBCAMERA_DISABLE_COPY_AND_MOVE(MediaPad)
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friend class MediaDevice;
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MediaPad(const struct media_v2_pad *pad, MediaEntity *entity);
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unsigned int index_;
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MediaEntity *entity_;
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unsigned int flags_;
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std::vector<MediaLink *> links_;
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};
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class MediaEntity : public MediaObject
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{
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public:
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enum class Type {
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Invalid,
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MediaEntity,
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V4L2Subdevice,
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V4L2VideoDevice,
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};
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const std::string &name() const { return name_; }
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unsigned int function() const { return function_; }
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unsigned int flags() const { return flags_; }
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Type type() const { return type_; }
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const std::string &deviceNode() const { return deviceNode_; }
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unsigned int deviceMajor() const { return major_; }
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unsigned int deviceMinor() const { return minor_; }
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const std::vector<MediaPad *> &pads() const { return pads_; }
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const std::vector<MediaEntity *> ancillaryEntities() const { return ancillaryEntities_; }
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const MediaPad *getPadByIndex(unsigned int index) const;
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const MediaPad *getPadById(unsigned int id) const;
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int setDeviceNode(const std::string &deviceNode);
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private:
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LIBCAMERA_DISABLE_COPY_AND_MOVE(MediaEntity)
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friend class MediaDevice;
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MediaEntity(MediaDevice *dev, const struct media_v2_entity *entity,
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const struct media_v2_interface *iface);
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void addPad(MediaPad *pad);
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void addAncillaryEntity(MediaEntity *ancillaryEntity);
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std::string name_;
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unsigned int function_;
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unsigned int flags_;
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Type type_;
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std::string deviceNode_;
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unsigned int major_;
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unsigned int minor_;
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std::vector<MediaPad *> pads_;
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std::vector<MediaEntity *> ancillaryEntities_;
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};
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} /* namespace libcamera */
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