[Asterisk-code-review] chan sip: Only send video on outgoing channel if incoming ch... (asterisk[11])

[Michael Kuron]

Michael Kuron has uploaded a new change for review.

  https://gerrit.asterisk.org/4111

Change subject: chan_sip: Only send video on outgoing channel if incoming channel supports it
......................................................................

chan_sip: Only send video on outgoing channel if incoming channel supports it

Previously, the settings videosupport=always and videosupport=yes behaved
identically and unconditionally caused a video offer to be sent in the SDP on
an outgoing call. This was a regression introduced with commit
5a1d90e1fbfc4b48927aad55311f3b38efbf1f54 in Asterisk 1.6.1.

This commit restores correct behavior: videosupport=always causes a video offer
to be sent unconditionally, while videosupport=yes will only offer video on an
outbound channel if the incoming channel it is bridged to also supports video.
That way, the device receiving the outgoing call can display the correct user
interface elements for audio or video and will not unnecessarily show a blank
video window on an audio-only call.

ASTERISK-17470 #close

Change-Id: I782f4409d436114dbc97061c3570c0cd24f7c3ae
---
M channels/chan_sip.c
1 file changed, 6 insertions(+), 1 deletion(-)


  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/11/4111/1

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 556db57..0b8bb2f 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -7839,12 +7839,17 @@
 	   We also check for vrtp. If it's not there, we are not allowed do any video anyway.
 	 */
 	if (i->vrtp) {
-		if (ast_test_flag(&i->flags[1], SIP_PAGE2_VIDEOSUPPORT))
+		if (ast_test_flag(&i->flags[1], SIP_PAGE2_VIDEOSUPPORT_ALWAYS))
 			needvideo = 1;
 		else if (!ast_format_cap_is_empty(i->prefcaps))
 			needvideo = ast_format_cap_has_type(i->prefcaps, AST_FORMAT_TYPE_VIDEO);	/* Outbound call */
 		else
 			needvideo = ast_format_cap_has_type(i->jointcaps, AST_FORMAT_TYPE_VIDEO);	/* Inbound call */
+
+		if (!needvideo) {
+			ast_rtp_instance_destroy(i->vrtp);
+			i->vrtp = NULL;
+		}
 	}
 
 	if (i->trtp) {

-- 
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Gerrit-MessageType: newchange
Gerrit-Change-Id: I782f4409d436114dbc97061c3570c0cd24f7c3ae
Gerrit-PatchSet: 1
Gerrit-Project: asterisk
Gerrit-Branch: 11
Gerrit-Owner: Michael Kuron <m.kuron at gmx.de>