add external_video_source to media handle and expose…

add external_video_source to media handle and expose switch_core_media_start_video_thread() to start the core video thread for non-rtp based media

src/include/switch_core_media.h

@@ -146,6 +146,15 @@ typedef struct switch_core_media_params_s {
 	switch_core_media_dtmf_t dtmf_type;
 	switch_payload_t cng_pt;
 
+	/* a core_video_thread will be started automatically
+	   when uses rtp based media,
+	   external_video_source should be set to SWITCH_TRUE and
+	   switch_core_media_start_video_thread()
+	   should be explicitly called to start the video thread
+	   if uses the media handle for non-rtp based media
+	*/
+	switch_bool_t external_video_source;
+
 } switch_core_media_params_t;
 
 static inline const char *switch_media_type2str(switch_media_type_t type)
@@ -252,6 +261,7 @@ SWITCH_DECLARE(void) switch_core_media_deinit(void);
 SWITCH_DECLARE(void) switch_core_media_set_stats(switch_core_session_t *session);
 SWITCH_DECLARE(void) switch_core_session_wake_video_thread(switch_core_session_t *session);
 SWITCH_DECLARE(void) switch_core_session_clear_crypto(switch_core_session_t *session);
+SWITCH_DECLARE(switch_status_t) switch_core_media_start_video_thread(switch_core_session_t *session);
 
 SWITCH_DECLARE(switch_status_t) switch_core_session_get_payload_code(switch_core_session_t *session,
 																	 switch_media_type_t type,

src/switch_core_media.c

@@ -4375,7 +4375,10 @@ static switch_status_t start_video_thread(switch_core_session_t *session)
 
 	switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_NOTICE, "%s Starting Video thread\n", switch_core_session_get_name(session));
 
+	if (v_engine->rtp_session) {
 		switch_rtp_set_default_payload(v_engine->rtp_session, v_engine->cur_payload_map->agreed_pt);
+	}
+
 	v_engine->mh.session = session;
 	switch_threadattr_create(&thd_attr, pool);
 	switch_threadattr_stacksize_set(thd_attr, SWITCH_THREAD_STACKSIZE);
@@ -4388,7 +4391,10 @@ static switch_status_t start_video_thread(switch_core_session_t *session)
 	return SWITCH_STATUS_SUCCESS;
 }
 
-
+SWITCH_DECLARE(switch_status_t) switch_core_media_start_video_thread(switch_core_session_t *session)
+{
+	return start_video_thread(session);
+}
 
 //?
 #define RA_PTR_LEN 512
@@ -4940,7 +4946,13 @@ SWITCH_DECLARE(void) switch_core_session_wake_video_thread(switch_core_session_t
 
 	v_engine = &smh->engines[SWITCH_MEDIA_TYPE_VIDEO];
 
-	if (!v_engine->rtp_session) {
+	if ((!smh->mparams->external_video_source) && (!v_engine->rtp_session)) {
+		return;
+	}
+
+	if (!v_engine->mh.cond_mutex) {
+		switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_WARNING, "Channel %s has no cond?\n",
+						  switch_channel_get_name(session->channel));
 		return;
 	}