+ /** @brief True if track preparation is underway
+ *
+ * This is set when a decoder has been started and is expected to connect to
+ * the speaker, but the speaker has not sent as @ref SM_ARRIVED message back
+ * yet. */
+ int preparing;
+
+ /** @brief True if decoder is connected to speaker
+ *
+ * This is not a @ref playing_state for a couple of reasons
+ * - it is orthogonal to @ref playing_started and @ref playing_unplayed
+ * - it would have to be hidden to other users of @c queue_entry
+ *
+ * For non-raw tracks this should always be zero.
+ */