Sound: Port to a copy-on-write concept

This change makes it so sound handles are created for evaluated scene,
sequencer and speakers. This allows to have properly evaluated animation
on them.

For the viewport playback sound uses regular dependency graph.

For the final render sound uses dependency graph created for render pipeline,
which now also contains sequencer and sound datablocks.

All the direct sound update calls are replaced with corresponding dependency
graph recalc tag.

1 files changed, 8 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_scene.h b/source/blender/blenkernel/BKE_scene.h
index 0dcb109240c..f90429aaebe 100644
--- a/source/blender/blenkernel/BKE_scene.h
+++ b/source/blender/blenkernel/BKE_scene.h
@@ -246,6 +246,14 @@ void BKE_scene_cursor_from_mat4(struct View3DCursor *cursor,
                                 const float mat[4][4],
                                 bool use_compat);
 
+/* Dependency graph evaluation. */
+
+/* Evaluate parts of sequences which needs to be done as a part of a dependency graph evaluation.
+ * This does NOT include actual rendering of the strips, but rather makes them up-to-date for
+ * animation playback and makes them ready for the sequencer's rendering pipeline to render them.
+ */
+void BKE_scene_eval_sequencer_sequences(struct Depsgraph *depsgraph, struct Scene *scene);
+
 #ifdef __cplusplus
 }
 #endif