libcamera: camera: Provide a list of ControlInfo

Extend the Camera class to expose the controls it supports. Each
pipeline should generate a list of controls supported by each camera it
creates. These are represented by a ControlInfoMap, and an associated
ControlList of default values.

Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

1 files changed, 19 insertions, 0 deletions

diff --git a/src/libcamera/pipeline_handler.cpp b/src/libcamera/pipeline_handler.cpp
index c91ef2f7..0283e4e5 100644
--- a/src/libcamera/pipeline_handler.cpp
+++ b/src/libcamera/pipeline_handler.cpp
@@ -89,6 +89,14 @@ LOG_DEFINE_CATEGORY(Pipeline)
  */
 
 /**
+ * \var CameraData::controlInfo_
+ * \brief The set of controls supported by the camera
+ *
+ * The control information shall be initialised by the pipeline handler when
+ * creating the camera, and shall not be modified afterwards.
+ */
+
+/**
  * \class PipelineHandler
  * \brief Create and manage cameras based on a set of media devices
  *
@@ -218,6 +226,17 @@ void PipelineHandler::unlock()
 }
 
 /**
+ * \brief Retrieve the list of controls for a camera
+ * \param[in] camera The camera
+ * \return A ControlInfoMap listing the controls support by \a camera
+ */
+const ControlInfoMap &PipelineHandler::controls(Camera *camera)
+{
+	CameraData *data = cameraData(camera);
+	return data->controlInfo_;
+}
+
+/**
  * \fn PipelineHandler::generateConfiguration()
  * \brief Generate a camera configuration for a specified camera
  * \param[in] camera The camera to generate a default configuration for