0052aaa40e
Create a udev_monitor in the udev device enumerator to listen to media device disconnection, and emit the corresponding media device's disconnect signal in response. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
80 lines
1.5 KiB
C++
80 lines
1.5 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 <map>
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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 EventNotifier;
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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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class DeviceEnumeratorUdev: public DeviceEnumerator
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{
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public:
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DeviceEnumeratorUdev();
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~DeviceEnumeratorUdev();
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int init() final;
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int enumerate() final;
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private:
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struct udev *udev_;
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struct udev_monitor *monitor_;
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EventNotifier *notifier_;
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std::string lookupDeviceNode(int major, int minor) final;
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void udevNotify(EventNotifier *notifier);
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};
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} /* namespace libcamera */
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#endif /* __LIBCAMERA_DEVICE_ENUMERATOR_H__ */
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