libcamera: pipeline: uvcvideo: Initialize CameraData from MediaDevice

The UVCCameraData::init() is the only consumer of the default entry in
the media graph, move the lookup of it into the init() function and pass
it the MediaDevice. This is done in preparation to extend the CameraData
initialization to consume more information from the MediaDevice.

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

1 files changed, 15 insertions, 15 deletions

diff --git a/src/libcamera/pipeline/uvcvideo/uvcvideo.cpp b/src/libcamera/pipeline/uvcvideo/uvcvideo.cpp
index ba0efc8b..eff866b6 100644
--- a/src/libcamera/pipeline/uvcvideo/uvcvideo.cpp
+++ b/src/libcamera/pipeline/uvcvideo/uvcvideo.cpp
@@ -44,7 +44,7 @@ public:
 		delete video_;
 	}
 
-	int init(MediaEntity *entity);
+	int init(MediaDevice *media);
 	void addControl(uint32_t cid, const ControlInfo &v4l2info,
 			ControlInfoMap::Map *ctrls);
 	void bufferReady(FrameBuffer *buffer);
@@ -463,18 +463,7 @@ bool PipelineHandlerUVC::match(DeviceEnumerator *enumerator)
 
 	std::unique_ptr<UVCCameraData> data = std::make_unique<UVCCameraData>(this);
 
-	/* Locate and initialise the camera data with the default video node. */
-	const std::vector<MediaEntity *> &entities = media->entities();
-	auto entity = std::find_if(entities.begin(), entities.end(),
-				   [](MediaEntity *entity) {
-					   return entity->flags() & MEDIA_ENT_FL_DEFAULT;
-				   });
-	if (entity == entities.end()) {
-		LOG(UVC, Error) << "Could not find a default video device";
-		return false;
-	}
-
-	if (data->init(*entity))
+	if (data->init(media))
 		return false;
 
 	/* Create and register the camera. */
@@ -494,12 +483,23 @@ bool PipelineHandlerUVC::match(DeviceEnumerator *enumerator)
 	return true;
 }
 
-int UVCCameraData::init(MediaEntity *entity)
+int UVCCameraData::init(MediaDevice *media)
 {
 	int ret;
 
+	/* Locate and initialise the camera data with the default video node. */
+	const std::vector<MediaEntity *> &entities = media->entities();
+	auto entity = std::find_if(entities.begin(), entities.end(),
+				   [](MediaEntity *entity) {
+					   return entity->flags() & MEDIA_ENT_FL_DEFAULT;
+				   });
+	if (entity == entities.end()) {
+		LOG(UVC, Error) << "Could not find a default video device";
+		return -ENODEV;
+	}
+
 	/* Create and open the video device. */
-	video_ = new V4L2VideoDevice(entity);
+	video_ = new V4L2VideoDevice(*entity);
 	ret = video_->open();
 	if (ret)
 		return ret;