ipa: raspberrypi: Return an error code from Algorithm::read()

When encountering errors, the Algorithm::read() function either uses
LOG(Fatal) or throws exceptions from the boost property_tree functions.
To prepare for replacing boost JSON parse with the YamlParser class,
give the Algorithm::read() function the ability to return an error code,
and propagate it all the way to the IPA module init() function.

All algorithm classes return a hardcoded 0 value for now, subsequent
commits will change that.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
Tested-by: Naushir Patuck <naush@raspberrypi.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/ipa/raspberrypi/controller/algorithm.h b/src/ipa/raspberrypi/controller/algorithm.h
index 92fd895d..0c5566fd 100644
--- a/src/ipa/raspberrypi/controller/algorithm.h
+++ b/src/ipa/raspberrypi/controller/algorithm.h
@@ -35,7 +35,7 @@ public:
 	virtual bool isPaused() const { return paused_; }
 	virtual void pause() { paused_ = true; }
 	virtual void resume() { paused_ = false; }
-	virtual void read(boost::property_tree::ptree const &params);
+	virtual int read(boost::property_tree::ptree const &params);
 	virtual void initialise();
 	virtual void switchMode(CameraMode const &cameraMode, Metadata *metadata);
 	virtual void prepare(Metadata *imageMetadata);