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, 2 insertions, 1 deletions

diff --git a/src/ipa/raspberrypi/controller/rpi/sharpen.cpp b/src/ipa/raspberrypi/controller/rpi/sharpen.cpp
index 36b75f69..9c4cffa4 100644
--- a/src/ipa/raspberrypi/controller/rpi/sharpen.cpp
+++ b/src/ipa/raspberrypi/controller/rpi/sharpen.cpp
@@ -37,7 +37,7 @@ void Sharpen::switchMode(CameraMode const &cameraMode,
 	modeFactor_ = std::max(1.0, cameraMode.noiseFactor);
 }
 
-void Sharpen::read(boost::property_tree::ptree const &params)
+int Sharpen::read(boost::property_tree::ptree const &params)
 {
 	threshold_ = params.get<double>("threshold", 1.0);
 	strength_ = params.get<double>("strength", 1.0);
@@ -46,6 +46,7 @@ void Sharpen::read(boost::property_tree::ptree const &params)
 		<< "Read threshold " << threshold_
 		<< " strength " << strength_
 		<< " limit " << limit_;
+	return 0;
 }
 
 void Sharpen::setStrength(double strength)