[libcamera-devel] [PATCH v5 09/23] libcamera: pipeline_handler: Fatal if registering camera without media devices

[Paul Elder]

Pipeline handlers must acquire media devices via
PipelineHander::acquireMediaDevice so that the media devices can be
registered with the pipeline handler, so that they can be automatically
added to the devnum map for the v4l2 compatibility layer to use. Die
fatally if any camera trying to be registered has not acquired any media
devices via acquireMediaDevice.

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

---
No change in v5

Cosmetic change in v4

No change in v3
---
 src/libcamera/pipeline_handler.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/libcamera/pipeline_handler.cpp b/src/libcamera/pipeline_handler.cpp
index de5ca09..ccd45ed 100644
--- a/src/libcamera/pipeline_handler.cpp
+++ b/src/libcamera/pipeline_handler.cpp
@@ -496,6 +496,10 @@ void PipelineHandler::registerCamera(std::shared_ptr<Camera> camera,
 	cameraData_[camera.get()] = std::move(data);
 	cameras_.push_back(camera);
 
+	if (mediaDevices_.empty())
+		LOG(Pipeline, Fatal)
+			<< "Registering camera with no media devices!";
+
 	/*
 	 * Walk the entity list and map the devnums of all capture video nodes
 	 * to the camera.
-- 
2.27.0