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libcamera: camera_sensor: Introduce CameraSensorFactory

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Introduce a factory to create CameraSensor derived classes instances by
inspecting the sensor media entity name and provide a convenience macro
to register specialized sensor handlers.

Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
This commit is contained in:
Jacopo Mondi 2019-12-17 12:47:51 +01:00
parent 27cece6653
commit 6ba23735b9
12 changed files with 233 additions and 40 deletions
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48
include/libcamera/internal/camera_sensor.h
View file

@ -38,7 +38,6 @@ enum class Orientation;
class CameraSensor : protected Loggable
{
public:
explicit CameraSensor(const MediaEntity *entity);
~CameraSensor();
int init();
@ -81,6 +80,7 @@ public:
int setTestPatternMode(controls::draft::TestPatternModeEnum mode);
protected:
explicit CameraSensor(const MediaEntity *entity);
std::string logPrefix() const override;
private:
@ -122,4 +122,50 @@ private:
std::unique_ptr<CameraLens> focusLens_;
};
class CameraSensorFactoryBase
{
public:
CameraSensorFactoryBase();
virtual ~CameraSensorFactoryBase() = default;
static std::unique_ptr<CameraSensor> create(MediaEntity *entity);
private:
LIBCAMERA_DISABLE_COPY_AND_MOVE(CameraSensorFactoryBase)
static std::vector<CameraSensorFactoryBase *> &factories();
static void registerFactory(CameraSensorFactoryBase *factory);
virtual bool match(const MediaEntity *entity) const = 0;
virtual std::unique_ptr<CameraSensor>
createInstance(MediaEntity *entity) const = 0;
};
template<typename _CameraSensor>
class CameraSensorFactory final : public CameraSensorFactoryBase
{
public:
CameraSensorFactory()
: CameraSensorFactoryBase()
{
}
private:
bool match(const MediaEntity *entity) const override
{
return _CameraSensor::match(entity);
}
std::unique_ptr<CameraSensor>
createInstance(MediaEntity *entity) const override
{
return _CameraSensor::create(entity);
}
};
#define REGISTER_CAMERA_SENSOR(sensor) \
static CameraSensorFactory<sensor> global_##sensor##Factory{};
} /* namespace libcamera */