libcamera: camera: Create a CameraControlValidator

Create a Camera-specific CameraControlValidator for the Camera instance.
This will allow requests to use a single validator instance without
having to construct their own.

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

include/libcamera/internal/camera.h

@@ -19,6 +19,7 @@
 
 namespace libcamera {
 
+class CameraControlValidator;
 class PipelineHandler;
 class Stream;
 
@@ -38,6 +39,8 @@ public:
 
 	uint32_t requestSequence_;
 
+	const CameraControlValidator *validator() const { return validator_.get(); }
+
 private:
 	enum State {
 		CameraAvailable,
@@ -64,6 +67,8 @@ private:
 
 	bool disconnected_;
 	std::atomic<State> state_;
+
+	std::unique_ptr<CameraControlValidator> validator_;
 };
 
 } /* namespace libcamera */

src/libcamera/camera.cpp

@@ -19,6 +19,7 @@
 #include <libcamera/stream.h>
 
 #include "libcamera/internal/camera.h"
+#include "libcamera/internal/camera_controls.h"
 #include "libcamera/internal/pipeline_handler.h"
 
 /**
@@ -366,6 +367,12 @@ Camera::Private::~Private()
  * \return The pipeline handler that created this camera
  */
 
+/**
+ * \fn Camera::Private::validator()
+ * \brief Retrieve the control validator related to this camera
+ * \return The control validator associated with this camera
+ */
+
 /**
  * \var Camera::Private::queuedRequests_
  * \brief The list of queued and not yet completed requests
@@ -665,6 +672,7 @@ Camera::Camera(std::unique_ptr<Private> d, const std::string &id,
 {
 	_d()->id_ = id;
 	_d()->streams_ = streams;
+	_d()->validator_ = std::make_unique<CameraControlValidator>(this);
 }
 
 Camera::~Camera()