5cb45181d7
In order to support a default implementation for camera sensors when no better implementation matches, libcamera needs to try "specialized" implementations first and pick the default last. Make this possible by adding a priority value for factories. Newly registered factories are inserted in the factories list sorted by descending priority, and the default factory uses a negative priority to be inserted as the last element. This mechanism may be a bit overkill in the sense that there is no expected use cases for priorities other than trying the default last, but the implementation is simple and easy to understand. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
124 lines
3.3 KiB
C++
124 lines
3.3 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2019, Google Inc.
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*
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* A camera sensor
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*/
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#pragma once
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#include <memory>
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#include <string>
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#include <variant>
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#include <vector>
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#include <libcamera/base/class.h>
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#include <libcamera/control_ids.h>
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#include <libcamera/controls.h>
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#include <libcamera/geometry.h>
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#include <libcamera/orientation.h>
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#include <libcamera/transform.h>
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#include "libcamera/internal/bayer_format.h"
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#include "libcamera/internal/v4l2_subdevice.h"
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namespace libcamera {
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class CameraLens;
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class MediaEntity;
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class SensorConfiguration;
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enum class Orientation;
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struct IPACameraSensorInfo;
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class CameraSensor
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{
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public:
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virtual ~CameraSensor();
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virtual const std::string &model() const = 0;
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virtual const std::string &id() const = 0;
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virtual const MediaEntity *entity() const = 0;
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virtual V4L2Subdevice *device() = 0;
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virtual CameraLens *focusLens() = 0;
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virtual const std::vector<unsigned int> &mbusCodes() const = 0;
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virtual std::vector<Size> sizes(unsigned int mbusCode) const = 0;
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virtual Size resolution() const = 0;
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virtual V4L2SubdeviceFormat
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getFormat(const std::vector<unsigned int> &mbusCodes,
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const Size &size) const = 0;
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virtual int setFormat(V4L2SubdeviceFormat *format,
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Transform transform = Transform::Identity) = 0;
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virtual int tryFormat(V4L2SubdeviceFormat *format) const = 0;
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virtual int applyConfiguration(const SensorConfiguration &config,
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Transform transform = Transform::Identity,
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V4L2SubdeviceFormat *sensorFormat = nullptr) = 0;
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virtual const ControlList &properties() const = 0;
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virtual int sensorInfo(IPACameraSensorInfo *info) const = 0;
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virtual Transform computeTransform(Orientation *orientation) const = 0;
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virtual BayerFormat::Order bayerOrder(Transform t) const = 0;
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virtual const ControlInfoMap &controls() const = 0;
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virtual ControlList getControls(const std::vector<uint32_t> &ids) = 0;
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virtual int setControls(ControlList *ctrls) = 0;
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virtual const std::vector<controls::draft::TestPatternModeEnum> &
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testPatternModes() const = 0;
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virtual int setTestPatternMode(controls::draft::TestPatternModeEnum mode) = 0;
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};
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class CameraSensorFactoryBase
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{
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public:
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CameraSensorFactoryBase(const char *name, int priority);
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virtual ~CameraSensorFactoryBase() = default;
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static std::unique_ptr<CameraSensor> create(MediaEntity *entity);
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const std::string &name() const { return name_; }
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int priority() const { return priority_; }
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private:
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LIBCAMERA_DISABLE_COPY_AND_MOVE(CameraSensorFactoryBase)
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static std::vector<CameraSensorFactoryBase *> &factories();
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static void registerFactory(CameraSensorFactoryBase *factory);
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virtual std::variant<std::unique_ptr<CameraSensor>, int>
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match(MediaEntity *entity) const = 0;
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std::string name_;
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int priority_;
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};
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template<typename _CameraSensor>
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class CameraSensorFactory final : public CameraSensorFactoryBase
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{
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public:
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CameraSensorFactory(const char *name, int priority)
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: CameraSensorFactoryBase(name, priority)
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{
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}
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private:
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std::variant<std::unique_ptr<CameraSensor>, int>
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match(MediaEntity *entity) const override
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{
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return _CameraSensor::match(entity);
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}
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};
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#define REGISTER_CAMERA_SENSOR(sensor, priority) \
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static CameraSensorFactory<sensor> global_##sensor##Factory{ #sensor, priority };
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} /* namespace libcamera */
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