improve core and basic flow

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4174 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/include/switch_channel.h

@@ -294,6 +294,13 @@ SWITCH_DECLARE(switch_status_t) switch_channel_perform_mark_answered(switch_chan
 */
 #define switch_channel_mark_answered(channel) switch_channel_perform_mark_answered(channel, __FILE__, __SWITCH_FUNC__, __LINE__)
 
+/*!
+  \brief Mark a channel pre_answered (early media) with no indication (for outbound calls)
+  \param channel channel to mark pre_answered
+  \return SWITCH_STATUS_SUCCESS if channel was pre_answered successfully
+*/
+#define switch_channel_mark_pre_answered(channel) switch_channel_perform_mark_pre_answered(channel, __FILE__, __SWITCH_FUNC__, __LINE__)
+
 SWITCH_DECLARE(switch_status_t) switch_channel_perform_ringback(switch_channel_t *channel,
 																const char *file,
 																const char *func,
@@ -310,6 +317,12 @@ SWITCH_DECLARE(switch_status_t) switch_channel_perform_pre_answer(switch_channel
                                                                   const char *file,
                                                                   const char *func,
                                                                   int line);
+
+SWITCH_DECLARE(switch_status_t) switch_channel_perform_mark_pre_answered(switch_channel_t *channel,
+                                                                       const char *file,
+                                                                       const char *func,
+                                                                       int line);
+
 /*!
   \brief Indicate progress on a channel to attempt early media
   \param channel channel to pre-answer

src/include/switch_core.h

@@ -522,6 +522,13 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_queue_message(switch_core_se
 */
 SWITCH_DECLARE(switch_status_t) switch_core_session_dequeue_message(switch_core_session_t *session, switch_core_session_message_t **message);
 
+/*! 
+  \brief Flush a message queue on a given session
+  \param session the session to de-queue the message on
+  \return the  SWITCH_STATUS_SUCCESS if the message was de-queued
+*/
+SWITCH_DECLARE(switch_status_t) switch_core_session_flush_message(switch_core_session_t *session);
+
 /*! 
   \brief Queue an event on another session using its uuid
   \param uuid_str the unique id of the session you want to send a message to