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diff --git a/source/blender/io/alembic/intern/abc_exporter.h b/source/blender/io/alembic/intern/abc_exporter.h
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+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+/** \file
+ * \ingroup balembic
+ */
+
+#ifndef __ABC_EXPORTER_H__
+#define __ABC_EXPORTER_H__
+
+#include <Alembic/Abc/All.h>
+#include <map>
+#include <set>
+#include <vector>
+
+#include "abc_util.h"
+
+class AbcObjectWriter;
+class AbcTransformWriter;
+class ArchiveWriter;
+
+struct Base;
+struct Depsgraph;
+struct Main;
+struct Object;
+struct Scene;
+struct ViewLayer;
+
+struct ExportSettings {
+  ExportSettings();
+
+  Scene *scene;
+  /** Scene layer to export; all its objects will be exported, unless selected_only=true. */
+  ViewLayer *view_layer;
+  Depsgraph *depsgraph;
+  SimpleLogger logger;
+
+  bool selected_only;
+  bool visible_objects_only;
+  bool renderable_only;
+
+  double frame_start, frame_end;
+  double frame_samples_xform;
+  double frame_samples_shape;
+  double shutter_open;
+  double shutter_close;
+  float global_scale;
+
+  bool flatten_hierarchy;
+
+  bool export_normals;
+  bool export_uvs;
+  bool export_vcols;
+  bool export_face_sets;
+  bool export_vweigths;
+  bool export_hair;
+  bool export_particles;
+
+  bool apply_subdiv;
+  bool curves_as_mesh;
+  bool use_subdiv_schema;
+  bool export_child_hairs;
+  bool export_ogawa;
+  bool pack_uv;
+  bool triangulate;
+
+  int quad_method;
+  int ngon_method;
+};
+
+class AbcExporter {
+  Main *m_bmain;
+  ExportSettings &m_settings;
+
+  const char *m_filename;
+
+  unsigned int m_trans_sampling_index, m_shape_sampling_index;
+
+  ArchiveWriter *m_writer;
+
+  /* mapping from name to transform writer */
+  typedef std::map<std::string, AbcTransformWriter *> m_xforms_type;
+  m_xforms_type m_xforms;
+
+  std::vector<AbcObjectWriter *> m_shapes;
+
+ public:
+  AbcExporter(Main *bmain, const char *filename, ExportSettings &settings);
+  ~AbcExporter();
+
+  void operator()(short *do_update, float *progress, bool *was_canceled);
+
+ protected:
+  void getShutterSamples(unsigned int nr_of_samples,
+                         bool time_relative,
+                         std::vector<double> &samples);
+  void getFrameSet(unsigned int nr_of_samples, std::set<double> &frames);
+
+ private:
+  Alembic::Abc::TimeSamplingPtr createTimeSampling(double step);
+
+  void createTransformWritersHierarchy();
+  AbcTransformWriter *createTransformWriter(Object *ob, Object *parent, Object *dupliObParent);
+  void exploreTransform(Base *base, Object *object, Object *parent, Object *dupliObParent);
+  void exploreObject(Base *base, Object *object, Object *dupliObParent);
+  void createShapeWriters();
+  void createShapeWriter(Object *ob, Object *dupliObParent);
+  void createParticleSystemsWriters(Object *ob, AbcTransformWriter *xform);
+
+  AbcTransformWriter *getXForm(const std::string &name);
+
+  void setCurrentFrame(Main *bmain, double t);
+};
+
+#endif /* __ABC_EXPORTER_H__ */