[libcamera-devel] [PATCH v2] libcamera: pipeline: uvcvideo: add warning if no default video device is found

[Niklas Söderlund]

If for any reason a default video device is not found in the media graph
the creation of the UVC pipeline silently failed. This is not optimal
when debugging problems with the pipeline, add an error to notify the
user of the issue.

Signed-off-by: Niklas Söderlund <niklas.soderlund at ragnatech.se>
---
 src/libcamera/pipeline/uvcvideo.cpp | 6 ++++++
 1 file changed, 6 insertions(+)
---
* Changes since v1
- Make the log output an Error instead of a Warning

diff --git a/src/libcamera/pipeline/uvcvideo.cpp b/src/libcamera/pipeline/uvcvideo.cpp
index c51e8bc1f2c2bf25..2ebdb2b9eb880174 100644
--- a/src/libcamera/pipeline/uvcvideo.cpp
+++ b/src/libcamera/pipeline/uvcvideo.cpp
@@ -8,12 +8,15 @@
 #include <libcamera/camera.h>
 
 #include "device_enumerator.h"
+#include "log.h"
 #include "media_device.h"
 #include "pipeline_handler.h"
 #include "v4l2_device.h"
 
 namespace libcamera {
 
+LOG_DEFINE_CATEGORY(UVC)
+
 class PipelineHandlerUVC : public PipelineHandler
 {
 public:
@@ -60,6 +63,9 @@ bool PipelineHandlerUVC::match(DeviceEnumerator *enumerator)
 	}
 
 	if (!video_ || video_->open()) {
+		if (!video_)
+			LOG(UVC, Error) << "Could not find a default video device";
+
 		media_->release();
 		return false;
 	}
-- 
2.20.1