libcamera: pipeline: add name

In order to match an IPA module with a pipeline handler, the pipeline
handler must have a name. Add a name attribute and getter to
PipelineHandler such that it can automatically be defined by
REGISTER_PIPELINE_HANDLER.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/libcamera/include/pipeline_handler.h

@@ -77,6 +77,8 @@ public:
 	bool completeBuffer(Camera *camera, Request *request, Buffer *buffer);
 	void completeRequest(Camera *camera, Request *request);
 
+	const char *name() const { return name_; }
+
 protected:
 	void registerCamera(std::shared_ptr<Camera> camera,
 			    std::unique_ptr<CameraData> data);
@@ -93,6 +95,10 @@ private:
 	std::vector<std::shared_ptr<MediaDevice>> mediaDevices_;
 	std::vector<std::weak_ptr<Camera>> cameras_;
 	std::map<const Camera *, std::unique_ptr<CameraData>> cameraData_;
+
+	const char *name_;
+
+	friend class PipelineHandlerFactory;
 };
 
 class PipelineHandlerFactory
@@ -108,6 +114,9 @@ public:
 	static void registerType(PipelineHandlerFactory *factory);
 	static std::vector<PipelineHandlerFactory *> &factories();
 
+protected:
+	void setInfo(PipelineHandler *handler, const char *name);
+
 private:
 	std::string name_;
 };
@@ -119,7 +128,10 @@ public:									\
 	handler##Factory() : PipelineHandlerFactory(#handler) {}	\
 	std::shared_ptr<PipelineHandler> create(CameraManager *manager)	\
 	{								\
-		return std::make_shared<handler>(manager);		\
+		std::shared_ptr<handler> h =				\
+			std::make_shared<handler>(manager);		\
+		setInfo(h.get(), #handler);				\
+		return h;						\
 	}								\
 };									\
 static handler##Factory global_##handler##Factory;

src/libcamera/pipeline_handler.cpp

@@ -505,6 +505,12 @@ CameraData *PipelineHandler::cameraData(const Camera *camera)
  * constant for the whole lifetime of the pipeline handler.
  */
 
+/**
+ * \fn PipelineHandler::name()
+ * \brief Retrieve the pipeline handler name
+ * \return The pipeline handler name
+ */
+
 /**
  * \class PipelineHandlerFactory
  * \brief Registration of PipelineHandler classes and creation of instances
@@ -582,6 +588,17 @@ std::vector<PipelineHandlerFactory *> &PipelineHandlerFactory::factories()
 	return factories;
 }
 
+/**
+ * \brief Set the information of a given pipeline handler
+ * \param[in] handler The handler whose info is to be set
+ * \param[in] name The name of the pipeline handler
+ */
+void PipelineHandlerFactory::setInfo(PipelineHandler *handler,
+				     const char *name)
+{
+	handler->name_ = name;
+}
+
 /**
  * \def REGISTER_PIPELINE_HANDLER
  * \brief Register a pipeline handler with the pipeline handler factory