df587aa100
libcamera depends on libudev for device enumeration. It is however useful to allow building documentation without requiring the dependency to be installed. Make the libudev dependency optional and compile the udev-based device enumerator out when libudev is not present. Note that while libcamera will compile without libudev, it will not be able to enumerate devices. A sysfs-based device enumerator is planned as a fallback but not implemented yet. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
59 lines
1.1 KiB
C++
59 lines
1.1 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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* device_enumerator.h - API to enumerate and find media devices
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*/
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#ifndef __LIBCAMERA_DEVICE_ENUMERATOR_H__
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#define __LIBCAMERA_DEVICE_ENUMERATOR_H__
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#include <memory>
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#include <string>
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#include <vector>
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#include <linux/media.h>
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namespace libcamera {
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class MediaDevice;
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class DeviceMatch
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{
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public:
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DeviceMatch(const std::string &driver);
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void add(const std::string &entity);
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bool match(const MediaDevice *device) const;
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private:
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std::string driver_;
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std::vector<std::string> entities_;
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};
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class DeviceEnumerator
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{
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public:
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static std::unique_ptr<DeviceEnumerator> create();
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virtual ~DeviceEnumerator();
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virtual int init() = 0;
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virtual int enumerate() = 0;
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std::shared_ptr<MediaDevice> search(const DeviceMatch &dm);
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protected:
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int addDevice(const std::string &deviceNode);
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void removeDevice(const std::string &deviceNode);
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private:
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std::vector<std::shared_ptr<MediaDevice>> devices_;
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virtual std::string lookupDeviceNode(int major, int minor) = 0;
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};
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} /* namespace libcamera */
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#endif /* __LIBCAMERA_DEVICE_ENUMERATOR_H__ */
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