[libcamera-devel] [PATCH v4 07/10] libcamera: pipeline_handler: Add Camera properties

[Jacopo Mondi]

Associate to each Camera a ControlList which contains the Camera
properties as created by pipeline handlers in the pipeline handler's
CameraData and provide an operation to retrieve them.

Collect properties from the camera sensor in all pipeline handlers that
support one (IPU3, RKISP1 and VIMC).

Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund at ragnatech.se>
Signed-off-by: Jacopo Mondi <jacopo at jmondi.org>
---
 src/libcamera/include/pipeline_handler.h |  2 ++
 src/libcamera/pipeline/ipu3/ipu3.cpp     |  3 +++
 src/libcamera/pipeline/rkisp1/rkisp1.cpp |  3 +++
 src/libcamera/pipeline/vimc.cpp          |  4 ++++
 src/libcamera/pipeline_handler.cpp       | 19 +++++++++++++++++++
 5 files changed, 31 insertions(+)

diff --git a/src/libcamera/include/pipeline_handler.h b/src/libcamera/include/pipeline_handler.h
index 067baef56278..241755f6823e 100644
--- a/src/libcamera/include/pipeline_handler.h
+++ b/src/libcamera/include/pipeline_handler.h
@@ -44,6 +44,7 @@ public:
 	PipelineHandler *pipe_;
 	std::list<Request *> queuedRequests_;
 	ControlInfoMap controlInfo_;
+	ControlList properties_;
 	std::unique_ptr<IPAInterface> ipa_;
 
 private:
@@ -65,6 +66,7 @@ public:
 	void unlock();
 
 	const ControlInfoMap &controls(Camera *camera);
+	const ControlList &properties(Camera *camera);
 
 	virtual CameraConfiguration *generateConfiguration(Camera *camera,
 		const StreamRoles &roles) = 0;
diff --git a/src/libcamera/pipeline/ipu3/ipu3.cpp b/src/libcamera/pipeline/ipu3/ipu3.cpp
index 6d8c3fada127..53a800148d22 100644
--- a/src/libcamera/pipeline/ipu3/ipu3.cpp
+++ b/src/libcamera/pipeline/ipu3/ipu3.cpp
@@ -865,6 +865,9 @@ int PipelineHandlerIPU3::registerCameras()
 		if (ret)
 			continue;
 
+		/* Initialize the camera properties. */
+		data->properties_ = cio2->sensor_->properties();
+
 		/**
 		 * \todo Dynamically assign ImgU and output devices to each
 		 * stream and camera; as of now, limit support to two cameras
diff --git a/src/libcamera/pipeline/rkisp1/rkisp1.cpp b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
index 7e41222e3d01..d70f3391118a 100644
--- a/src/libcamera/pipeline/rkisp1/rkisp1.cpp
+++ b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
@@ -887,6 +887,9 @@ int PipelineHandlerRkISP1::createCamera(MediaEntity *sensor)
 	if (ret)
 		return ret;
 
+	/* Initialize the camera properties. */
+	data->properties_ = data->sensor_->properties();
+
 	ret = data->loadIPA();
 	if (ret)
 		return ret;
diff --git a/src/libcamera/pipeline/vimc.cpp b/src/libcamera/pipeline/vimc.cpp
index 292900bcf8d1..075ae86f3245 100644
--- a/src/libcamera/pipeline/vimc.cpp
+++ b/src/libcamera/pipeline/vimc.cpp
@@ -452,6 +452,10 @@ int VimcCameraData::init(MediaDevice *media)
 	}
 
 	controlInfo_ = std::move(ctrls);
+
+	/* Initialize the camera properties. */
+	properties_ = sensor_->properties();
+
 	return 0;
 }
 
diff --git a/src/libcamera/pipeline_handler.cpp b/src/libcamera/pipeline_handler.cpp
index 698dd5256079..ced045a2bd54 100644
--- a/src/libcamera/pipeline_handler.cpp
+++ b/src/libcamera/pipeline_handler.cpp
@@ -98,6 +98,14 @@ LOG_DEFINE_CATEGORY(Pipeline)
  * creating the camera, and shall not be modified afterwards.
  */
 
+/**
+ * \var CameraData::properties_
+ * \brief The list of properties supported by the camera
+ *
+ * The list of camera properties shall be initialised by the pipeline handler
+ * when creating the camera, and shall not be modified afterwards.
+ */
+
 /**
  * \var CameraData::ipa_
  * \brief The IPA module used by the camera
@@ -246,6 +254,17 @@ const ControlInfoMap &PipelineHandler::controls(Camera *camera)
 	return data->controlInfo_;
 }
 
+/**
+ * \brief Retrieve the list of properties for a camera
+ * \param[in] camera The camera
+ * \return A ControlList of properties supported by \a camera
+ */
+const ControlList &PipelineHandler::properties(Camera *camera)
+{
+	CameraData *data = cameraData(camera);
+	return data->properties_;
+}
+
 /**
  * \fn PipelineHandler::generateConfiguration()
  * \brief Generate a camera configuration for a specified camera
-- 
2.24.0