Fix T66913: undo after frame-change doesn't refresh properly

Use the ID.recalc flag to detect when updates after frame-change is
needed. Since comparing the last calculated frame doesn't take undo into
account (see code-comment for details).

`ID_RECALC_AUDIO_SEEK` has been renamed to `ID_RECALC_FRAME_CHANGE`
since this is not only related to audio however internally this flag is
still categorized in `NodeType::AUDIO`.

Reviewed By: sergey

Ref D13942

source/blender/blenkernel/intern/scene.c

@@ -2522,7 +2522,7 @@ void BKE_scene_update_sound(Depsgraph *depsgraph, Main *bmain)
   Scene *scene = DEG_get_evaluated_scene(depsgraph);
   const int recalc = scene->id.recalc;
   BKE_sound_ensure_scene(scene);
-  if (recalc & ID_RECALC_AUDIO_SEEK) {
+  if (recalc & ID_RECALC_FRAME_CHANGE) {
     BKE_sound_seek_scene(bmain, scene);
   }
   if (recalc & ID_RECALC_AUDIO_FPS) {

source/blender/depsgraph/intern/depsgraph_eval.cc

@@ -72,6 +72,14 @@ void DEG_evaluate_on_refresh(Depsgraph *graph)
     deg_graph->frame = frame;
     deg_graph->ctime = ctime;
   }
+  else if (scene->id.recalc & ID_RECALC_FRAME_CHANGE) {
+    /* Comparing depsgraph & scene frame fails in the case of undo,
+     * since the undo state is stored before updates from the frame change have been applied.
+     * In this case reading back the undo state will behave as if no updates on frame change
+     * is needed as the #Depsgraph.ctime & frame will match the values in the input scene.
+     * Use #ID_RECALC_FRAME_CHANGE to detect that recalculation is necessary. see: T66913. */
+    deg_graph->tag_time_source();
+  }
 
   deg_flush_updates_and_refresh(deg_graph);
 }

source/blender/depsgraph/intern/depsgraph_tag.cc

@@ -211,7 +211,7 @@ void depsgraph_tag_to_component_opcode(const ID *id,
     case ID_RECALC_SEQUENCER_STRIPS:
       *component_type = NodeType::SEQUENCER;
       break;
-    case ID_RECALC_AUDIO_SEEK:
+    case ID_RECALC_FRAME_CHANGE:
     case ID_RECALC_AUDIO_FPS:
     case ID_RECALC_AUDIO_VOLUME:
     case ID_RECALC_AUDIO_MUTE:
@@ -737,8 +737,8 @@ const char *DEG_update_tag_as_string(IDRecalcFlag flag)
       return "EDITORS";
     case ID_RECALC_SEQUENCER_STRIPS:
       return "SEQUENCER_STRIPS";
-    case ID_RECALC_AUDIO_SEEK:
-      return "AUDIO_SEEK";
+    case ID_RECALC_FRAME_CHANGE:
+      return "FRAME_CHANGE";
     case ID_RECALC_AUDIO_FPS:
       return "AUDIO_FPS";
     case ID_RECALC_AUDIO_VOLUME:

source/blender/editors/animation/anim_ops.c

@@ -169,7 +169,7 @@ static void change_frame_apply(bContext *C, wmOperator *op)
   FRAMENUMBER_MIN_CLAMP(CFRA);
 
   /* do updates */
-  DEG_id_tag_update(&scene->id, ID_RECALC_AUDIO_SEEK);
+  DEG_id_tag_update(&scene->id, ID_RECALC_FRAME_CHANGE);
   WM_event_add_notifier(C, NC_SCENE | ND_FRAME, scene);
 }
 

source/blender/editors/screen/screen_edit.c

@@ -1662,7 +1662,7 @@ void ED_screen_animation_timer(bContext *C, int redraws, int sync, int enable)
   }
 
   /* Seek audio to ensure playback in preview range with AV sync. */
-  DEG_id_tag_update(&scene->id, ID_RECALC_AUDIO_SEEK);
+  DEG_id_tag_update(&scene->id, ID_RECALC_FRAME_CHANGE);
 
   /* Notifier caught by top header, for button. */
   WM_event_add_notifier(C, NC_SCREEN | ND_ANIMPLAY, NULL);

source/blender/editors/screen/screen_ops.c

@@ -2986,7 +2986,7 @@ static int frame_offset_exec(bContext *C, wmOperator *op)
 
   areas_do_frame_follow(C, false);
 
-  DEG_id_tag_update(&scene->id, ID_RECALC_AUDIO_SEEK);
+  DEG_id_tag_update(&scene->id, ID_RECALC_FRAME_CHANGE);
 
   WM_event_add_notifier(C, NC_SCENE | ND_FRAME, scene);
 
@@ -3047,7 +3047,7 @@ static int frame_jump_exec(bContext *C, wmOperator *op)
 
     areas_do_frame_follow(C, true);
 
-    DEG_id_tag_update(&scene->id, ID_RECALC_AUDIO_SEEK);
+    DEG_id_tag_update(&scene->id, ID_RECALC_FRAME_CHANGE);
 
     WM_event_add_notifier(C, NC_SCENE | ND_FRAME, scene);
   }
@@ -3161,7 +3161,7 @@ static int keyframe_jump_exec(bContext *C, wmOperator *op)
 
   areas_do_frame_follow(C, true);
 
-  DEG_id_tag_update(&scene->id, ID_RECALC_AUDIO_SEEK);
+  DEG_id_tag_update(&scene->id, ID_RECALC_FRAME_CHANGE);
 
   WM_event_add_notifier(C, NC_SCENE | ND_FRAME, scene);
 
@@ -3225,7 +3225,7 @@ static int marker_jump_exec(bContext *C, wmOperator *op)
 
   areas_do_frame_follow(C, true);
 
-  DEG_id_tag_update(&scene->id, ID_RECALC_AUDIO_SEEK);
+  DEG_id_tag_update(&scene->id, ID_RECALC_FRAME_CHANGE);
 
   WM_event_add_notifier(C, NC_SCENE | ND_FRAME, scene);
 
@@ -4626,7 +4626,7 @@ static int screen_animation_step_invoke(bContext *C, wmOperator *UNUSED(op), con
   if (scene_eval == NULL) {
     /* Happens when undo/redo system is used during playback, nothing meaningful we can do here. */
   }
-  else if (scene_eval->id.recalc & ID_RECALC_AUDIO_SEEK) {
+  else if (scene_eval->id.recalc & ID_RECALC_FRAME_CHANGE) {
     /* Ignore seek here, the audio will be updated to the scene frame after jump during next
      * dependency graph update. */
   }
@@ -4741,7 +4741,7 @@ static int screen_animation_step_invoke(bContext *C, wmOperator *UNUSED(op), con
   }
 
   if (sad->flag & ANIMPLAY_FLAG_JUMPED) {
-    DEG_id_tag_update(&scene->id, ID_RECALC_AUDIO_SEEK);
+    DEG_id_tag_update(&scene->id, ID_RECALC_FRAME_CHANGE);
 #ifdef PROFILE_AUDIO_SYNCH
     old_frame = CFRA;
 #endif

source/blender/editors/space_clip/clip_ops.c

@@ -1082,7 +1082,7 @@ static void change_frame_apply(bContext *C, wmOperator *op)
   SUBFRA = 0.0f;
 
   /* do updates */
-  DEG_id_tag_update(&scene->id, ID_RECALC_AUDIO_SEEK);
+  DEG_id_tag_update(&scene->id, ID_RECALC_FRAME_CHANGE);
   WM_event_add_notifier(C, NC_SCENE | ND_FRAME, scene);
 }
 

source/blender/editors/space_clip/tracking_ops.c

@@ -1385,7 +1385,7 @@ static int frame_jump_exec(bContext *C, wmOperator *op)
 
   if (CFRA != sc->user.framenr) {
     CFRA = sc->user.framenr;
-    DEG_id_tag_update(&scene->id, ID_RECALC_AUDIO_SEEK);
+    DEG_id_tag_update(&scene->id, ID_RECALC_FRAME_CHANGE);
 
     WM_event_add_notifier(C, NC_SCENE | ND_FRAME, scene);
   }

source/blender/editors/space_graph/graph_ops.c

@@ -103,7 +103,7 @@ static void graphview_cursor_apply(bContext *C, wmOperator *op)
     }
 
     SUBFRA = 0.0f;
-    DEG_id_tag_update(&scene->id, ID_RECALC_AUDIO_SEEK);
+    DEG_id_tag_update(&scene->id, ID_RECALC_FRAME_CHANGE);
   }
 
   /* set the cursor value */

source/blender/editors/space_image/image_ops.c

@@ -3605,7 +3605,7 @@ static void change_frame_apply(bContext *C, wmOperator *op)
   SUBFRA = 0.0f;
 
   /* do updates */
-  DEG_id_tag_update(&scene->id, ID_RECALC_AUDIO_SEEK);
+  DEG_id_tag_update(&scene->id, ID_RECALC_FRAME_CHANGE);
   WM_event_add_notifier(C, NC_SCENE | ND_FRAME, scene);
 }
 

source/blender/editors/space_sequencer/sequencer_edit.c

@@ -2213,7 +2213,7 @@ static int sequencer_strip_jump_exec(bContext *C, wmOperator *op)
     return OPERATOR_CANCELLED;
   }
 
-  DEG_id_tag_update(&scene->id, ID_RECALC_AUDIO_SEEK);
+  DEG_id_tag_update(&scene->id, ID_RECALC_FRAME_CHANGE);
   WM_event_add_notifier(C, NC_SCENE | ND_FRAME, scene);
 
   return OPERATOR_FINISHED;

source/blender/makesdna/DNA_ID.h

@@ -800,7 +800,9 @@ typedef enum IDRecalcFlag {
    * Use this tag with a scene ID which owns the sequences. */
   ID_RECALC_SEQUENCER_STRIPS = (1 << 14),
 
-  ID_RECALC_AUDIO_SEEK = (1 << 15),
+  /* Runs on frame-change (used for seeking audio too). */
+  ID_RECALC_FRAME_CHANGE = (1 << 15),
+
   ID_RECALC_AUDIO_FPS = (1 << 16),
   ID_RECALC_AUDIO_VOLUME = (1 << 17),
   ID_RECALC_AUDIO_MUTE = (1 << 18),

source/blender/makesrna/intern/rna_scene.c

@@ -1028,7 +1028,7 @@ static void rna_Scene_frame_update(Main *UNUSED(bmain),
                                    PointerRNA *ptr)
 {
   Scene *scene = (Scene *)ptr->owner_id;
-  DEG_id_tag_update(&scene->id, ID_RECALC_AUDIO_SEEK);
+  DEG_id_tag_update(&scene->id, ID_RECALC_FRAME_CHANGE);
   WM_main_add_notifier(NC_SCENE | ND_FRAME, scene);
 }
 

source/blender/windowmanager/intern/wm_event_system.c

@@ -3589,7 +3589,7 @@ void wm_event_do_handlers(bContext *C)
       if (scene_eval != NULL) {
         const int is_playing_sound = BKE_sound_scene_playing(scene_eval);
 
-        if (scene_eval->id.recalc & ID_RECALC_AUDIO_SEEK) {
+        if (scene_eval->id.recalc & ID_RECALC_FRAME_CHANGE) {
           /* Ignore seek here, the audio will be updated to the scene frame after jump during next
            * dependency graph update. */
         }