From f49d438ced7c5874dbf43976d9901a462176f541 Mon Sep 17 00:00:00 2001
From: Sebastian Parborg <darkdefende@gmail.com>
Date: Fri, 20 Aug 2021 16:30:34 +0200
Subject: Cleanup and remove SEQ_ALL_BEGIN macro

We now use a for_each function with callback to iterate through all sequences in the scene.

This has the benefit that we now only loop over the sequences in the scene once.
Before we would loop over them twice and allocate memory to store temporary data.

The allocation of temporary data lead to unintentional memory leaks if the code used returns to exit out of the iteration loop.
The new for_each callback method doesn't allocate any temporary data and only iterates though all sequences once.

Reviewed By: Richard Antalik, Bastien Montagne

Differential Revision: http://developer.blender.org/D12278
---
 source/blender/blenkernel/intern/ipo.c | 100 ++++++++++++++++++---------------
 1 file changed, 54 insertions(+), 46 deletions(-)

(limited to 'source/blender/blenkernel/intern/ipo.c')

diff --git a/source/blender/blenkernel/intern/ipo.c b/source/blender/blenkernel/intern/ipo.c
index 8a70f065e40..aac081991e3 100644
--- a/source/blender/blenkernel/intern/ipo.c
+++ b/source/blender/blenkernel/intern/ipo.c
@@ -2038,6 +2038,58 @@ static void nlastrips_to_animdata(ID *id, ListBase *strips)
   }
 }
 
+typedef struct Seq_callback_data {
+  Main *bmain;
+  Scene *scene;
+  AnimData *adt;
+} Seq_callback_data;
+
+static bool seq_convert_callback(Sequence *seq, void *userdata)
+{
+  IpoCurve *icu = (seq->ipo) ? seq->ipo->curve.first : NULL;
+  short adrcode = SEQ_FAC1;
+
+  if (G.debug & G_DEBUG) {
+    printf("\tconverting sequence strip %s\n", seq->name + 2);
+  }
+
+  if (ELEM(NULL, seq->ipo, icu)) {
+    seq->flag |= SEQ_USE_EFFECT_DEFAULT_FADE;
+    return true;
+  }
+
+  /* patch adrcode, so that we can map
+   * to different DNA variables later
+   * (semi-hack (tm) )
+   */
+  switch (seq->type) {
+    case SEQ_TYPE_IMAGE:
+    case SEQ_TYPE_META:
+    case SEQ_TYPE_SCENE:
+    case SEQ_TYPE_MOVIE:
+    case SEQ_TYPE_COLOR:
+      adrcode = SEQ_FAC_OPACITY;
+      break;
+    case SEQ_TYPE_SPEED:
+      adrcode = SEQ_FAC_SPEED;
+      break;
+  }
+  icu->adrcode = adrcode;
+
+  Seq_callback_data *cd = (Seq_callback_data *)userdata;
+
+  /* convert IPO */
+  ipo_to_animdata(cd->bmain, (ID *)cd->scene, seq->ipo, NULL, NULL, seq);
+
+  if (cd->adt->action) {
+    cd->adt->action->idroot = ID_SCE; /* scene-rooted */
+  }
+
+  id_us_min(&seq->ipo->id);
+  seq->ipo = NULL;
+  return true;
+}
+
 /* *************************************************** */
 /* External API - Only Called from do_versions() */
 
@@ -2286,52 +2338,8 @@ void do_versions_ipos_to_animato(Main *bmain)
     Scene *scene = (Scene *)id;
     Editing *ed = scene->ed;
     if (ed && ed->seqbasep) {
-      Sequence *seq;
-
-      AnimData *adt = BKE_animdata_ensure_id(id);
-
-      SEQ_ALL_BEGIN (ed, seq) {
-        IpoCurve *icu = (seq->ipo) ? seq->ipo->curve.first : NULL;
-        short adrcode = SEQ_FAC1;
-
-        if (G.debug & G_DEBUG) {
-          printf("\tconverting sequence strip %s\n", seq->name + 2);
-        }
-
-        if (ELEM(NULL, seq->ipo, icu)) {
-          seq->flag |= SEQ_USE_EFFECT_DEFAULT_FADE;
-          continue;
-        }
-
-        /* patch adrcode, so that we can map
-         * to different DNA variables later
-         * (semi-hack (tm) )
-         */
-        switch (seq->type) {
-          case SEQ_TYPE_IMAGE:
-          case SEQ_TYPE_META:
-          case SEQ_TYPE_SCENE:
-          case SEQ_TYPE_MOVIE:
-          case SEQ_TYPE_COLOR:
-            adrcode = SEQ_FAC_OPACITY;
-            break;
-          case SEQ_TYPE_SPEED:
-            adrcode = SEQ_FAC_SPEED;
-            break;
-        }
-        icu->adrcode = adrcode;
-
-        /* convert IPO */
-        ipo_to_animdata(bmain, (ID *)scene, seq->ipo, NULL, NULL, seq);
-
-        if (adt->action) {
-          adt->action->idroot = ID_SCE; /* scene-rooted */
-        }
-
-        id_us_min(&seq->ipo->id);
-        seq->ipo = NULL;
-      }
-      SEQ_ALL_END;
+      Seq_callback_data cb_data = {bmain, scene, BKE_animdata_ensure_id(id)};
+      SEQ_for_each_callback(&ed->seqbase, seq_convert_callback, &cb_data);
     }
   }
 
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