From: Mark Spencer <markster@digium.com>
Date: Tue, 8 Apr 2003 21:50:32 +0000 (+0000)
Subject: Send empty voice frame on 183 session progress
X-Git-Tag: 0.4.0~51
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=6978d58552fb01ee227bb43cf17774e627e03a97;p=thirdparty%2Fasterisk.git

Send empty voice frame on 183 session progress


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@787 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 5ee2eadad9..ad096208ab 100755
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -3741,9 +3741,17 @@ static void handle_response(struct sip_pvt *p, int resp, char *rest, struct sip_
 		case 100:
 			break;
 		case 183:	/* We don't really need this since we pass in-band audio anyway */
-			/* Not important */
-			if (strlen(get_header(req, "Content-Type")))
-				process_sdp(p, req);
+			{
+				/* Send back an empty audio frame to get things moving, (like in the case of 
+				   back-to-back 183's, getting audio */
+				if (strlen(get_header(req, "Content-Type")))
+					process_sdp(p, req);
+				if (p->owner && p->owner->pvt) {
+					struct ast_frame af = { AST_FRAME_VOICE, };
+					af.subclass = p->owner->pvt->rawreadformat;
+					ast_queue_frame(p->owner, &af, 0);
+				}
+			}
 			break;
 		case 180:
 			if (p->owner) {