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/noise.cpp b/src/ipa/raspberrypi/controller/rpi/noise.cpp
index 5d2c85ad..74fa99ba 100644
--- a/src/ipa/raspberrypi/controller/rpi/noise.cpp
+++ b/src/ipa/raspberrypi/controller/rpi/noise.cpp
@@ -41,10 +41,11 @@ void Noise::switchMode(CameraMode const &cameraMode,
 	modeFactor_ = std::max(1.0, cameraMode.noiseFactor);
 }
 
-void Noise::read(boost::property_tree::ptree const &params)
+int Noise::read(boost::property_tree::ptree const &params)
 {
 	referenceConstant_ = params.get<double>("reference_constant");
 	referenceSlope_ = params.get<double>("reference_slope");
+	return 0;
 }
 
 void Noise::prepare(Metadata *imageMetadata)