Merge "bridge: Add a deferred queue."

include/asterisk/bridge_channel.h

@@ -145,6 +145,8 @@ struct ast_bridge_channel {
 	AST_LIST_ENTRY(ast_bridge_channel) entry;
 	/*! Queue of outgoing frames to the channel. */
 	AST_LIST_HEAD_NOLOCK(, ast_frame) wr_queue;
+	/*! Queue of deferred frames, queued onto channel when other party joins. */
+	AST_LIST_HEAD_NOLOCK(, ast_frame) deferred_queue;
 	/*! Pipe to alert thread when frames are put into the wr_queue. */
 	int alert_pipe[2];
 	/*!

include/asterisk/bridge_channel_internal.h

@@ -96,6 +96,17 @@ struct ast_bridge_channel *bridge_channel_internal_alloc(struct ast_bridge *brid
  */
 void bridge_channel_settle_owed_events(struct ast_bridge *orig_bridge, struct ast_bridge_channel *bridge_channel);
 
+/*!
+ * \internal
+ * \brief Queue any deferred frames on the channel.
+ * \since 13.17.0
+ *
+ * \param bridge_channel Channel that the deferred frames should be pulled from and queued to.
+ *
+ * \return Nothing
+ */
+void bridge_channel_queue_deferred_frames(struct ast_bridge_channel *bridge_channel);
+
 /*!
  * \internal
  * \brief Push the bridge channel into its specified bridge.

include/asterisk/bridge_technology.h

@@ -156,6 +156,9 @@ struct ast_bridge_technology {
 	 * \retval -1 Frame needs to be deferred.
 	 *
 	 * \note On entry, bridge is already locked.
+	 *
+	 * \note Deferred frames will be automatically queued onto the channel when another
+	 * channel joins the bridge.
 	 */
 	int (*write)(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, struct ast_frame *frame);
 	/*!