libcamera/libcamera.git - libcamera official repository

path: root/src/ipa/raspberrypi/controller/rpi/focus.hpp

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2018, Google Inc.
 *
 * camera_manager.h - Camera management
 */

#include <libcamera/camera_manager.h>

#include <libcamera/camera.h>
#include <libcamera/event_dispatcher.h>

#include "device_enumerator.h"
#include "event_dispatcher_poll.h"
#include "log.h"
#include "pipeline_handler.h"
#include "thread.h"
#include "utils.h"

/**
 * \file camera_manager.h
 * \brief The camera manager
 */

namespace libcamera {

LOG_DEFINE_CATEGORY(Camera)

/**
 * \class CameraManager
 * \brief Provide access and manage all cameras in the system
 *
 * The camera manager is the entry point to libcamera. It enumerates devices,
 * associates them with pipeline managers, and provides access to the cameras
 * in the system to applications. The manager owns all Camera objects and
 * handles hot-plugging and hot-unplugging to manage the lifetime of cameras.
 *
 * To interact with libcamera, an application starts by creating a camera
 * manager instance. Only a single instance of the camera manager may exist at
 * a time. Attempting to create a second instance without first deleting the
 * existing instance results in undefined behaviour.
 *
 * The manager is initially stopped, and shall be configured before being
 * started. In particular a custom event dispatcher shall be installed if
 * needed with CameraManager::setEventDispatcher().
 *
 * Once the camera manager is configured, it shall be started with start().
 * This will enumerate all the cameras present in the system, which can then be
 * listed with list() and retrieved with get().
 *
 * Cameras are shared through std::shared_ptr<>, ensuring that a camera will
 * stay valid until the last reference is released without requiring any special
 * action from the application. Once the application has released all the
 * references it held to cameras, the camera manager can be stopped with
 * stop().
 *
 * \todo Add interface to register a notification callback to the user to be
 * able to inform it new cameras have been hot-plugged or cameras have been
 * removed due to hot-unplug.
 */

CameraManager *CameraManager::self_ = nullptr;

CameraManager::CameraManager()
	: enumerator_(nullptr)
{
	if (self_)
		LOG(Camera, Fatal)


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