FS-11380: [core] add new internal function

src/include/switch_ivr.h

@@ -542,6 +542,14 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_multi_threaded_bridge(_In_ switch_cor
 																 switch_input_callback_function_t dtmf_callback, void *session_data,
 																 void *peer_session_data);
 
+/*!
+  \brief Bridge leaving b-leg in the control of another thread.  Call from b-leg first then call switch_ivr_multi_threaded_bridge on a-leg and b-leg.
+  \param session b-leg session
+  \return SWITCH_STATUS_SUCCESS if all is well
+*/								
+SWITCH_DECLARE(switch_status_t) switch_ivr_bridge_bleg(switch_core_session_t *session, switch_core_session_t *peer_session, uint32_t max_wait_ms);
+
+								
 /*!
   \brief Bridge Signalling from one session to another
   \param session one session

src/include/switch_types.h

@@ -1569,6 +1569,7 @@ typedef enum {
 	CF_AWAITING_STREAM_CHANGE,
 	CF_PROCESSING_STREAM_CHANGE,
 	CF_STREAM_CHANGED,
+	CF_ARRANGED_BRIDGE,
 	/* WARNING: DO NOT ADD ANY FLAGS BELOW THIS LINE */
 	/* IF YOU ADD NEW ONES CHECK IF THEY SHOULD PERSIST OR ZERO THEM IN switch_core_session.c switch_core_session_request_xml() */
 	CF_FLAG_MAX

src/switch_ivr_bridge.c

@@ -1076,6 +1076,38 @@ static const switch_state_handler_table_t audio_bridge_peer_state_handlers = {
 	/*.on_consume_media */ audio_bridge_on_consume_media,
 };
 
+
+SWITCH_DECLARE(switch_status_t) switch_ivr_bridge_bleg(switch_core_session_t *session, switch_core_session_t *peer_session, uint32_t max_wait_ms)
+{
+	switch_channel_t *channel;
+	switch_channel_t *peer_channel = NULL;
+	switch_status_t status = SWITCH_STATUS_SUCCESS;
+
+	switch_assert(session);
+	channel = switch_core_session_get_channel(session);
+	
+	switch_channel_set_flag(channel, CF_ARRANGED_BRIDGE);
+
+	if (peer_session) {
+		peer_channel = switch_core_session_get_channel(peer_session);
+	}
+
+	status = switch_channel_wait_for_flag(channel, CF_ARRANGED_BRIDGE, SWITCH_FALSE, max_wait_ms, peer_channel);
+
+	if (status == SWITCH_STATUS_FALSE) return status;
+
+	if (switch_channel_test_flag(channel, CF_ARRANGED_BRIDGE)) {
+		switch_channel_clear_flag(channel, CF_ARRANGED_BRIDGE);
+		return SWITCH_STATUS_FALSE;
+	} else {
+		audio_bridge_on_exchange_media(session);
+	}
+
+	return SWITCH_STATUS_SUCCESS;
+}
+
+
+
 static switch_status_t uuid_bridge_on_reset(switch_core_session_t *session);
 static switch_status_t uuid_bridge_on_hibernate(switch_core_session_t *session);
 static switch_status_t uuid_bridge_on_soft_execute(switch_core_session_t *session);
@@ -1636,7 +1668,9 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_multi_threaded_bridge(switch_core_ses
 			goto done;
 		}
 
+		if (!switch_channel_test_flag(peer_channel, CF_ARRANGED_BRIDGE)) {
 			switch_channel_set_state(peer_channel, CS_CONSUME_MEDIA);
+		}
 
 		switch_channel_set_variable(peer_channel, "call_uuid", switch_core_session_get_uuid(session));
 
@@ -1741,8 +1775,12 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_multi_threaded_bridge(switch_core_ses
 			}
 
 			switch_channel_set_private(peer_channel, "_bridge_", b_leg);
-			switch_channel_set_state(peer_channel, CS_EXCHANGE_MEDIA);
 
+			if (switch_channel_test_flag(peer_channel, CF_ARRANGED_BRIDGE)) {
+				switch_channel_clear_flag(peer_channel, CF_ARRANGED_BRIDGE);
+			} else {
+				switch_channel_set_state(peer_channel, CS_EXCHANGE_MEDIA);
+			}
 			
 			audio_bridge_thread(NULL, (void *) a_leg);