Refactor of proxies build operators

Split proxy build operator into three parts:
- Prepare context (IMB_anim_index_rebuild_context) which prepares all
  needed data and stores it in an anonymous structure used by specific
  builder lately.
- Build proxies/timecodes into temporary files (IMB_anim_index_rebuild)
  This function will build all selected proxies/timecodes into a temporary
  files so old proxies will be still available during building.
- Finish building proxies (IMB_anim_index_rebuild_finish) which copies
  temporary files over old proxies filed and releases all resources used
  by a context.

Context creation and finishing building happens in a main thread so
it's easy and safe to close all opened handles of proxies files and
refresh cache after rebuilding is finished.

This should finally fix #30315: Temporary proxy files are not erased and old proxys are not updated if the proxy is built more then once (windows)

1 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/imbuf/intern/anim_movie.c b/source/blender/imbuf/intern/anim_movie.c
index a0903379528..8722ca8e90a 100644
--- a/source/blender/imbuf/intern/anim_movie.c
+++ b/source/blender/imbuf/intern/anim_movie.c
@@ -241,6 +241,10 @@ void IMB_close_anim(struct anim * anim)
 	IMB_free_anim(anim);
 }
 
+void IMB_close_anim_proxies(struct anim *anim)
+{
+	IMB_free_indices(anim);
+}
 
 struct anim * IMB_open_anim( const char * name, int ib_flags, int streamindex)
 {