libcamera: software_isp: Move BlackLevel to libcamera::ipa::soft

IPA modules use custom namespaces for all their internal components to
avoid namespace clashes. The simple IPA module for the software ISP uses
libcamera::ipa::soft for this purpose. It however defines an internal
class named BlackLevel in the root of the libcamera namespace, making it
prone to clashes. Move it to the ipa::soft namespace along with the rest
of the code.

Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/ipa/simple/black_level.cpp

@@ -15,6 +15,8 @@ namespace libcamera {
 
 LOG_DEFINE_CATEGORY(IPASoftBL)
 
+namespace ipa::soft {
+
 /**
  * \class BlackLevel
  * \brief Object providing black point level for software ISP
@@ -85,4 +87,7 @@ void BlackLevel::update(SwIspStats::Histogram &yHistogram)
 		}
 	};
 }
+
+} /* namespace ipa::soft */
+
 } /* namespace libcamera */

src/ipa/simple/black_level.h

@@ -14,6 +14,8 @@
 
 namespace libcamera {
 
+namespace ipa::soft {
+
 class BlackLevel
 {
 public:
@@ -26,4 +28,6 @@ private:
 	bool blackLevelSet_;
 };
 
+} /* namespace ipa::soft */
+
 } /* namespace libcamera */