[libcamera-devel] [PATCH v3 26/33] cam: Move camera session creation and monitoring setup to run()

[Laurent Pinchart]

Move creation of the camera session and setup of the hotplug monitoring
from the init() function to the run() function, to group all the code
that performs operations based on command line options in a single
place. The cleanup() call on session creation failure isn't required
anymore, as the cleanup() function is called unconditionally upon return
from run().

This change allows merging two different code blocks related to hotplug
monitoring.

Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
---
 src/cam/main.cpp | 38 ++++++++++++++++++--------------------
 1 file changed, 18 insertions(+), 20 deletions(-)

diff --git a/src/cam/main.cpp b/src/cam/main.cpp
index 03e62f305f24..cba0793ac39b 100644
--- a/src/cam/main.cpp
+++ b/src/cam/main.cpp
@@ -84,26 +84,6 @@ int CamApp::init(int argc, char **argv)
 		return ret;
 	}
 
-	if (options_.isSet(OptCamera)) {
-		session_ = std::make_unique<CameraSession>(cm_.get(), options_);
-		if (!session_->isValid()) {
-			std::cout << "Failed to create camera session" << std::endl;
-			cleanup();
-			return -EINVAL;
-		}
-
-		std::cout << "Using camera " << session_->camera()->id()
-			  << std::endl;
-
-		session_->captureDone.connect(this, &CamApp::captureDone);
-	}
-
-	if (options_.isSet(OptMonitor)) {
-		cm_->cameraAdded.connect(this, &CamApp::cameraAdded);
-		cm_->cameraRemoved.connect(this, &CamApp::cameraRemoved);
-		std::cout << "Monitoring new hotplug and unplug events" << std::endl;
-	}
-
 	return 0;
 }
 
@@ -275,6 +255,19 @@ int CamApp::run()
 		}
 	}
 
+	if (options_.isSet(OptCamera)) {
+		session_ = std::make_unique<CameraSession>(cm_.get(), options_);
+		if (!session_->isValid()) {
+			std::cout << "Failed to create camera session" << std::endl;
+			return -EINVAL;
+		}
+
+		std::cout << "Using camera " << session_->camera()->id()
+			  << std::endl;
+
+		session_->captureDone.connect(this, &CamApp::captureDone);
+	}
+
 	if (options_.isSet(OptListControls)) {
 		ret = listControls();
 		if (ret)
@@ -312,7 +305,12 @@ int CamApp::run()
 	}
 
 	if (options_.isSet(OptMonitor)) {
+		std::cout << "Monitoring new hotplug and unplug events" << std::endl;
 		std::cout << "Press Ctrl-C to interrupt" << std::endl;
+
+		cm_->cameraAdded.connect(this, &CamApp::cameraAdded);
+		cm_->cameraRemoved.connect(this, &CamApp::cameraRemoved);
+
 		loop_.exec();
 	}
 
-- 
Regards,

Laurent Pinchart