libcamera: camera_sensor: Expose the Bayer order

Pipeline handlers may need to know the Bayer order produced by the
sensor when a Transform is applied (horizontal or vertical flip). This
is currently implemented manually in the Raspberry Pi pipeline handler.
Move the implementation to the CameraSensor class to make it usable in
other pipeline handlers.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>

include/libcamera/internal/camera_sensor.h

@@ -22,12 +22,12 @@
 
 #include <libcamera/ipa/core_ipa_interface.h>
 
+#include "libcamera/internal/bayer_format.h"
 #include "libcamera/internal/formats.h"
 #include "libcamera/internal/v4l2_subdevice.h"
 
 namespace libcamera {
 
-class BayerFormat;
 class CameraLens;
 class MediaEntity;
 class SensorConfiguration;
@@ -69,6 +69,7 @@ public:
 	const ControlList &properties() const { return properties_; }
 	int sensorInfo(IPACameraSensorInfo *info) const;
 	Transform computeTransform(Orientation *orientation) const;
+	BayerFormat::Order bayerOrder(Transform t) const;
 
 	const ControlInfoMap &controls() const;
 	ControlList getControls(const std::vector<uint32_t> &ids);
@@ -114,6 +115,7 @@ private:
 	Rectangle activeArea_;
 	const BayerFormat *bayerFormat_;
 	bool supportFlips_;
+	bool flipsAlterBayerOrder_;
 	Orientation mountingOrientation_;
 
 	ControlList properties_;