Basic Alembic support

All in all, this patch adds an Alembic importer, an Alembic exporter,
and a new CacheFile data block which, for now, wraps around an Alembic
archive. This data block is made available through a new modifier ("Mesh
Sequence Cache") as well as a new constraint ("Transform Cache") to
somewhat properly support respectively geometric and transformation data
streaming from alembic caches.

A more in-depth documentation is to be found on the wiki, as well as a
 guide to compile alembic: https://wiki.blender.org/index.php/
User:Kevindietrich/AlembicBasicIo.

Many thanks to everyone involved in this little project, and huge shout
out to "cgstrive" for the thorough testings with Maya, 3ds Max, Houdini
and Realflow as well as @fjuhec, @jensverwiebe and @jasperge for the
custom builds and compile fixes.

Reviewers: sergey, campbellbarton, mont29

Reviewed By: sergey, campbellbarton, mont29

Differential Revision: https://developer.blender.org/D2060

1 files changed, 67 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_cachefile.h b/source/blender/blenkernel/BKE_cachefile.h
new file mode 100644
index 00000000000..51b161f1a06
--- /dev/null
+++ b/source/blender/blenkernel/BKE_cachefile.h
@@ -0,0 +1,67 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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.
+ *
+ * The Original Code is Copyright (C) 2016 Blender Foundation.
+ * All rights reserved.
+ *
+ * Contributor(s): Kevin Dietrich.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#ifndef __BKE_CACHEFILE_H__
+#define __BKE_CACHEFILE_H__
+
+/** \file BKE_cachefile.h
+ *  \ingroup bke
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct CacheFile;
+struct Main;
+struct Scene;
+
+void *BKE_cachefile_add(struct Main *bmain, const char *name);
+
+void BKE_cachefile_init(struct CacheFile *cache_file);
+
+void BKE_cachefile_free(struct CacheFile *cache_file);
+
+struct CacheFile *BKE_cachefile_copy(struct Main *bmain, struct CacheFile *cache_file);
+
+void BKE_cachefile_make_local(struct Main *bmain, struct CacheFile *cache_file, const bool lib_local);
+
+void BKE_cachefile_reload(const struct Main *bmain, struct CacheFile *cache_file);
+
+void BKE_cachefile_ensure_handle(const struct Main *bmain, struct CacheFile *cache_file);
+
+void BKE_cachefile_update_frame(struct Main *bmain, struct Scene *scene, float ctime, const float fps);
+
+bool BKE_cachefile_filepath_get(
+        const struct Main *bmain, const struct CacheFile *cache_file, float frame,
+        char r_filename[1024]);
+
+float BKE_cachefile_time_offset(struct CacheFile *cache_file, const float time, const float fps);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /* __BKE_CACHEFILE_H__ */