Cleanup: Alembic, move the C++ code to `blender::io::alembic` namespace

This commit only moves code into the `blender::io::alembic` namespace,
it does not move `static` functions into an anonymous namespace.

No functional changes.

1 files changed, 8 insertions, 0 deletions

diff --git a/source/blender/io/alembic/intern/abc_reader_object.cc b/source/blender/io/alembic/intern/abc_reader_object.cc
index e5bd0771a42..39b9cd4c161 100644
--- a/source/blender/io/alembic/intern/abc_reader_object.cc
+++ b/source/blender/io/alembic/intern/abc_reader_object.cc
@@ -41,6 +41,10 @@ using Alembic::AbcGeom::IObject;
 using Alembic::AbcGeom::IXform;
 using Alembic::AbcGeom::IXformSchema;
 
+namespace blender {
+namespace io {
+namespace alembic {
+
 AbcObjectReader::AbcObjectReader(const IObject &object, ImportSettings &settings)
     : m_name(""),
       m_object_name(""),
@@ -330,3 +334,7 @@ void AbcObjectReader::decref()
   m_refcount--;
   BLI_assert(m_refcount >= 0);
 }
+
+}  // namespace alembic
+}  // namespace io
+}  // namespace blender