libcamera: camera_sensor: Introduce CameraSensorFactory

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@jmondi.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
---
Changes since combined RFC:

- Fix indentation in REGISTER_CAMERA_SENSOR() macro

2 files changed, 3 insertions, 4 deletions

diff --git a/test/v4l2_videodevice/v4l2_videodevice_test.cpp b/test/v4l2_videodevice/v4l2_videodevice_test.cpp
index 1113cf5b..9fbd24cc 100644
--- a/test/v4l2_videodevice/v4l2_videodevice_test.cpp
+++ b/test/v4l2_videodevice/v4l2_videodevice_test.cpp
@@ -64,8 +64,8 @@ int V4L2VideoDeviceTest::init()
 	format.size.height = 480;
 
 	if (driver_ == "vimc") {
-		sensor_ = new CameraSensor(media_->getEntityByName("Sensor A"));
-		if (sensor_->init())
+		sensor_ = CameraSensorFactoryBase::create(media_->getEntityByName("Sensor A"));
+		if (!sensor_)
 			return TestFail;
 
 		debayer_ = new V4L2Subdevice(media_->getEntityByName("Debayer A"));
@@ -98,6 +98,5 @@ void V4L2VideoDeviceTest::cleanup()
 	capture_->close();
 
 	delete debayer_;
-	delete sensor_;
 	delete capture_;
 }
diff --git a/test/v4l2_videodevice/v4l2_videodevice_test.h b/test/v4l2_videodevice/v4l2_videodevice_test.h
index d2de1a6d..f06db72a 100644
--- a/test/v4l2_videodevice/v4l2_videodevice_test.h
+++ b/test/v4l2_videodevice/v4l2_videodevice_test.h
@@ -36,7 +36,7 @@ protected:
 	std::string entity_;
 	std::unique_ptr<libcamera::DeviceEnumerator> enumerator_;
 	std::shared_ptr<libcamera::MediaDevice> media_;
-	libcamera::CameraSensor *sensor_;
+	std::unique_ptr<libcamera::CameraSensor> sensor_;
 	libcamera::V4L2Subdevice *debayer_;
 	libcamera::V4L2VideoDevice *capture_;
 	std::vector<std::unique_ptr<libcamera::FrameBuffer>> buffers_;