avutil/iamf: fix mix_gain_class name

Signed-off-by: James Almer <jamrial@gmail.com>
(cherry picked from commit b9af58184f)

libavcodec/av1dec.c

@@ -372,8 +372,13 @@ static void order_hint_info(AV1DecContext *s)
         int ref_order_hint = s->ref[ref_slot].order_hint;
 
         frame->order_hints[ref_name] = ref_order_hint;
-        frame->ref_frame_sign_bias[ref_name] =
-            get_relative_dist(seq, ref_order_hint, frame->order_hint);
+        if (!seq->enable_order_hint) {
+            frame->ref_frame_sign_bias[ref_name] = 0;
+        } else {
+            frame->ref_frame_sign_bias[ref_name] =
+                get_relative_dist(seq, ref_order_hint,
+                                  frame->order_hint) > 0;
+        }
     }
 }
 

libavutil/iamf.c

@@ -74,7 +74,7 @@ static const AVOption mix_gain_options[] = {
 };
 
 static const AVClass mix_gain_class = {
-    .class_name     = "AVIAMFSubmixElement",
+    .class_name     = "AVIAMFMixGain",
     .item_name      = av_default_item_name,
     .version        = LIBAVUTIL_VERSION_INT,
     .option         = mix_gain_options,