VSE: Speed Effect layout updates

**Changes:**
- New enums correspond to 4 modes: `Stretch`, `Multiply`, `Frame Number` and `Length`.
- "`Multiply Factor`" has been removed;
- Value corresponding to "`use as speed`" enabled is now the value appended to the `Multiply` enum;
- Value corresponding to "`use as speed`" disabled is now the value appended to the `Frame Number` enum;
- Value corresponding to "`Scale to Length`" enabled is now the value appended to the `Length` enum;
- Except `Stretch` each mode has now its respective control values.

Differential Revision: https://developer.blender.org/D11856

1 files changed, 79 insertions, 2 deletions

diff --git a/source/blender/blenloader/intern/versioning_300.c b/source/blender/blenloader/intern/versioning_300.c
index 927580e3e18..4dcb7414bb4 100644
--- a/source/blender/blenloader/intern/versioning_300.c
+++ b/source/blender/blenloader/intern/versioning_300.c
@@ -29,6 +29,7 @@
 #include "DNA_armature_types.h"
 #include "DNA_brush_types.h"
 #include "DNA_collection_types.h"
+#include "DNA_curve_types.h"
 #include "DNA_genfile.h"
 #include "DNA_listBase.h"
 #include "DNA_material_types.h"
@@ -41,6 +42,7 @@
 #include "BKE_asset.h"
 #include "BKE_collection.h"
 #include "BKE_deform.h"
+#include "BKE_fcurve.h"
 #include "BKE_fcurve_driver.h"
 #include "BKE_lib_id.h"
 #include "BKE_main.h"
@@ -49,11 +51,10 @@
 #include "BLO_readfile.h"
 #include "MEM_guardedalloc.h"
 #include "readfile.h"
-#include "versioning_common.h"
 
 #include "SEQ_sequencer.h"
 
-#include "MEM_guardedalloc.h"
+#include "RNA_access.h"
 
 #include "versioning_common.h"
 
@@ -113,6 +114,74 @@ static void move_vertex_group_names_to_object_data(Main *bmain)
   }
 }
 
+static void do_versions_sequencer_speed_effect_recursive(Scene *scene, const ListBase *seqbase)
+{
+  /* Old SpeedControlVars->flags. */
+#define SEQ_SPEED_INTEGRATE (1 << 0)
+#define SEQ_SPEED_COMPRESS_IPO_Y (1 << 2)
+
+  LISTBASE_FOREACH (Sequence *, seq, seqbase) {
+    if (seq->type == SEQ_TYPE_SPEED) {
+      SpeedControlVars *v = (SpeedControlVars *)seq->effectdata;
+      const char *substr = NULL;
+      float globalSpeed = v->globalSpeed;
+      if (seq->flag & SEQ_USE_EFFECT_DEFAULT_FADE) {
+        if (globalSpeed == 1.0f) {
+          v->speed_control_type = SEQ_SPEED_STRETCH;
+        }
+        else {
+          v->speed_control_type = SEQ_SPEED_MULTIPLY;
+          v->speed_fader = globalSpeed *
+                           ((float)seq->seq1->len /
+                            max_ff((float)(seq->seq1->enddisp - seq->seq1->start), 1.0f));
+        }
+      }
+      else if (v->flags & SEQ_SPEED_INTEGRATE) {
+        v->speed_control_type = SEQ_SPEED_MULTIPLY;
+        v->speed_fader = seq->speed_fader * globalSpeed;
+      }
+      else if (v->flags & SEQ_SPEED_COMPRESS_IPO_Y) {
+        globalSpeed *= 100.0f;
+        v->speed_control_type = SEQ_SPEED_LENGTH;
+        v->speed_fader_length = seq->speed_fader * globalSpeed;
+        substr = "speed_length";
+      }
+      else {
+        v->speed_control_type = SEQ_SPEED_FRAME_NUMBER;
+        v->speed_fader_frame_number = (int)(seq->speed_fader * globalSpeed);
+        substr = "speed_frame_number";
+      }
+
+      v->flags &= ~(SEQ_SPEED_INTEGRATE | SEQ_SPEED_COMPRESS_IPO_Y);
+
+      if (substr || globalSpeed != 1.0f) {
+        FCurve *fcu = id_data_find_fcurve(&scene->id, seq, &RNA_Sequence, "speed_factor", 0, NULL);
+        if (fcu) {
+          if (globalSpeed != 1.0f) {
+            for (int i = 0; i < fcu->totvert; i++) {
+              BezTriple *bezt = &fcu->bezt[i];
+              bezt->vec[0][1] *= globalSpeed;
+              bezt->vec[1][1] *= globalSpeed;
+              bezt->vec[2][1] *= globalSpeed;
+            }
+          }
+          if (substr) {
+            char *new_path = BLI_str_replaceN(fcu->rna_path, "speed_factor", substr);
+            MEM_freeN(fcu->rna_path);
+            fcu->rna_path = new_path;
+          }
+        }
+      }
+    }
+    else if (seq->type == SEQ_TYPE_META) {
+      do_versions_sequencer_speed_effect_recursive(scene, &seq->seqbase);
+    }
+  }
+
+#undef SEQ_SPEED_INTEGRATE
+#undef SEQ_SPEED_COMPRESS_IPO_Y
+}
+
 void do_versions_after_linking_300(Main *bmain, ReportList *UNUSED(reports))
 {
   if (MAIN_VERSION_ATLEAST(bmain, 300, 0) && !MAIN_VERSION_ATLEAST(bmain, 300, 1)) {
@@ -161,6 +230,14 @@ void do_versions_after_linking_300(Main *bmain, ReportList *UNUSED(reports))
     move_vertex_group_names_to_object_data(bmain);
   }
 
+  if (!MAIN_VERSION_ATLEAST(bmain, 300, 13)) {
+    LISTBASE_FOREACH (Scene *, scene, &bmain->scenes) {
+      if (scene->ed != NULL) {
+        do_versions_sequencer_speed_effect_recursive(scene, &scene->ed->seqbase);
+      }
+    }
+  }
+
   /**
    * Versioning code until next subversion bump goes here.
    *