From 0a1a173e57d0f9e797dbb4972adda2993fccd6d7 Mon Sep 17 00:00:00 2001
From: Sebastian Parborg <darkdefende@gmail.com>
Date: Tue, 5 Oct 2021 18:45:47 +0200
Subject: Cleanup: Make anim_getnew in the VSE less confusing

It was using dummy image buffers to indicate if an animation container
could be initialized or not.

Use booleans instead.
---
 source/blender/imbuf/intern/anim_movie.c | 44 ++++++++++++++------------------
 1 file changed, 19 insertions(+), 25 deletions(-)

(limited to 'source/blender')

diff --git a/source/blender/imbuf/intern/anim_movie.c b/source/blender/imbuf/intern/anim_movie.c
index 13f9356751e..4eb078113dd 100644
--- a/source/blender/imbuf/intern/anim_movie.c
+++ b/source/blender/imbuf/intern/anim_movie.c
@@ -1496,16 +1496,15 @@ static void free_anim_ffmpeg(struct anim *anim)
 
 #endif
 
-/* Try next picture to read */
-/* No picture, try to open next animation */
-/* Succeed, remove first image from animation */
+/* Try to init the anim struct.
+ * Returns true on success.*/
 
-static ImBuf *anim_getnew(struct anim *anim)
+static bool anim_getnew(struct anim *anim)
 {
-  struct ImBuf *ibuf = NULL;
-
+  BLI_assert(anim->curtype == ANIM_NONE);
   if (anim == NULL) {
-    return NULL;
+    /* Nothing to init. */
+    return false;
   }
 
   free_anim_movie(anim);
@@ -1518,44 +1517,43 @@ static ImBuf *anim_getnew(struct anim *anim)
   free_anim_ffmpeg(anim);
 #endif
 
-  if (anim->curtype != 0) {
-    return NULL;
-  }
   anim->curtype = imb_get_anim_type(anim->name);
 
   switch (anim->curtype) {
-    case ANIM_SEQUENCE:
-      ibuf = IMB_loadiffname(anim->name, anim->ib_flags, anim->colorspace);
+    case ANIM_SEQUENCE: {
+      ImBuf *ibuf = IMB_loadiffname(anim->name, anim->ib_flags, anim->colorspace);
       if (ibuf) {
         BLI_strncpy(anim->first, anim->name, sizeof(anim->first));
         anim->duration_in_frames = 1;
+        IMB_freeImBuf(ibuf);
+      }
+      else {
+        return false;
       }
       break;
+    }
     case ANIM_MOVIE:
       if (startmovie(anim)) {
-        return NULL;
+        return false;
       }
-      ibuf = IMB_allocImBuf(anim->x, anim->y, 24, 0); /* fake */
       break;
 #ifdef WITH_AVI
     case ANIM_AVI:
       if (startavi(anim)) {
         printf("couldn't start avi\n");
-        return NULL;
+        return false;
       }
-      ibuf = IMB_allocImBuf(anim->x, anim->y, 24, 0);
       break;
 #endif
 #ifdef WITH_FFMPEG
     case ANIM_FFMPEG:
       if (startffmpeg(anim)) {
-        return 0;
+        return false;
       }
-      ibuf = IMB_allocImBuf(anim->x, anim->y, 24, 0);
       break;
 #endif
   }
-  return ibuf;
+  return true;
 }
 
 struct ImBuf *IMB_anim_previewframe(struct anim *anim)
@@ -1589,14 +1587,10 @@ struct ImBuf *IMB_anim_absolute(struct anim *anim,
   filter_y = (anim->ib_flags & IB_animdeinterlace);
 
   if (preview_size == IMB_PROXY_NONE) {
-    if (anim->curtype == 0) {
-      ibuf = anim_getnew(anim);
-      if (ibuf == NULL) {
+    if (anim->curtype == ANIM_NONE) {
+      if (!anim_getnew(anim)) {
         return NULL;
       }
-
-      IMB_freeImBuf(ibuf); /* ???? */
-      ibuf = NULL;
     }
 
     if (position < 0) {
-- 
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