libcamera: ipa: Move IPA control serialization structures to libcamera namespace

The C structures used to serialize controls are currently defined in the
root namespace, which places them at the root level in the class list
generated by Doxygen. Move them to the libcamera namespace to fix that.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>

src/libcamera/ipa_controls.cpp

@@ -131,6 +131,8 @@
  * shall be ignored when parsing the packet.
  */
 
+namespace libcamera {
+
 /**
  * \def IPA_CONTROLS_FORMAT_VERSION
  * \brief The current control serialization format version
@@ -224,3 +226,5 @@ static_assert(sizeof(ipa_control_value_entry) == 16,
 
 static_assert(sizeof(ipa_control_info_entry) == 16,
 	      "Invalid ABI size change for struct ipa_control_info_entry");
+
+} /* namespace libcamera */