libcamera: pipeline_handler: Store pipe and camera in CameraData

Extend the CameraData class with two member variables pipe_ and camera_
that store pointers to the pipeline handler and camera that the
CameraData instance is related to. This will be used by pipeline
handlers to access the camera and the pipeline in member methods of
their CameraData derived classes.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

src/libcamera/pipeline/uvcvideo.cpp

@@ -46,8 +46,8 @@ private:
 	class UVCCameraData : public CameraData
 	{
 	public:
-		UVCCameraData()
-			: video_(nullptr)
+		UVCCameraData(PipelineHandler *pipe)
+			: CameraData(pipe), video_(nullptr)
 		{
 		}
 
@@ -181,7 +181,7 @@ bool PipelineHandlerUVC::match(DeviceEnumerator *enumerator)
 
 	media_->acquire();
 
-	std::unique_ptr<UVCCameraData> data = utils::make_unique<UVCCameraData>();
+	std::unique_ptr<UVCCameraData> data = utils::make_unique<UVCCameraData>(this);
 
 	/* Locate and open the default video node. */
 	for (MediaEntity *entity : media_->entities()) {