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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2018, Google Inc.
*
* media_device.h - Media device handler
*/
#ifndef __LIBCAMERA_INTERNAL_MEDIA_DEVICE_H__
#define __LIBCAMERA_INTERNAL_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_; }
unsigned int hwRevision() const { return hwRevision_; }
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 override;
private:
int open();
void close();
MediaObject *object(unsigned int id);
bool addObject(MediaObject *object);
void clear();
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);
std::string driver_;
std::string deviceNode_;
std::string model_;
unsigned int version_;
unsigned int hwRevision_;
int fd_;
bool valid_;
bool acquired_;
bool lockOwner_;
std::map<unsigned int, MediaObject *> objects_;
std::vector<MediaEntity *> entities_;
};
} /* namespace libcamera */
#endif /* __LIBCAMERA_INTERNAL_MEDIA_DEVICE_H__ */
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