vout: don't try to blend if we know it's not going to work

Signed-off-by: Thomas Guillem <thomas@gllm.fr>

src/video_output/video_output.c

@@ -933,16 +933,17 @@ static int ThreadDisplayRenderPicture(vout_thread_t *vout, bool is_forced)
     bool is_direct = vout->p->decoder_pool == vout->p->display_pool;
     picture_t *todisplay = filtered;
     if (do_early_spu && subpic) {
-        picture_t *blent = picture_pool_Get(vout->p->private_pool);
-        if (blent) {
-            VideoFormatCopyCropAr(&blent->format, &filtered->format);
-            picture_Copy(blent, filtered);
-            if (vout->p->spu_blend
-             && picture_BlendSubpicture(blent, vout->p->spu_blend, subpic)) {
-                picture_Release(todisplay);
-                todisplay = blent;
-            } else
-                picture_Release(blent);
+        if (vout->p->spu_blend) {
+            picture_t *blent = picture_pool_Get(vout->p->private_pool);
+            if (blent) {
+                VideoFormatCopyCropAr(&blent->format, &filtered->format);
+                picture_Copy(blent, filtered);
+                if (picture_BlendSubpicture(blent, vout->p->spu_blend, subpic)) {
+                    picture_Release(todisplay);
+                    todisplay = blent;
+                } else
+                    picture_Release(blent);
+            }
         }
         subpicture_Delete(subpic);
         subpic = NULL;