demux: mp4: flag incomplete boxes

modules/demux/mp4/libmp4.c

@@ -3355,6 +3355,7 @@ unknown:
         msg_Warn( p_stream,
                 "unknown box type c%3.3s (incompletely loaded)",
                 (char*)&p_box->i_type+1 );
+    p_box->e_flags |= BOX_FLAG_INCOMPLETE;
 
     return 1;
 }
@@ -3914,12 +3915,14 @@ static void MP4_BoxDumpStructure_Internal( stream_t *s,
         }
         if( MP4_BOX_TYPE_ASCII() )
             snprintf( &str[i_level * 4], sizeof(str) - 4*i_level,
-                      "+ %4.4s size %"PRIu64" offset %ld",
-                        (char*)&p_box->i_type, p_box->i_size, p_box->i_pos );
+                      "+ %4.4s size %"PRIu64" offset %ld%s",
+                        (char*)&p_box->i_type, p_box->i_size, p_box->i_pos,
+                    p_box->e_flags & BOX_FLAG_INCOMPLETE ? " (????)" : "" );
         else
             snprintf( &str[i_level * 4], sizeof(str) - 4*i_level,
-                      "+ c%3.3s size %"PRIu64" offset %ld",
-                        (char*)&p_box->i_type+1, p_box->i_size, p_box->i_pos );
+                      "+ c%3.3s size %"PRIu64" offset %ld%s",
+                        (char*)&p_box->i_type+1, p_box->i_size, p_box->i_pos,
+                    p_box->e_flags & BOX_FLAG_INCOMPLETE ? " (????)" : "" );
         msg_Dbg( s, "%s", str );
     }
     p_child = p_box->p_first;

modules/demux/mp4/libmp4.h

@@ -1376,6 +1376,12 @@ typedef struct MP4_Box_s
     uint32_t     i_type;
     uint32_t     i_shortsize;
 
+    enum
+    {
+        BOX_FLAG_NONE = 0,
+        BOX_FLAG_INCOMPLETE,
+    }            e_flags;
+
     UUID_t       i_uuid;  /* Set if i_type == "uuid" */
 
     uint64_t     i_size; /* always set so use it */