diff options
| author | Joshua Colp <jcolp@digium.com> | 2017-09-16 11:19:59 -0300 |
|---|---|---|
| committer | Joshua Colp <jcolp@digium.com> | 2017-09-21 12:20:02 -0500 |
| commit | f2985e310663b67ccc948515efeae500bdf94a0c (patch) | |
| tree | 311acb73d162a6611503b0e859b4576f7b6426d8 /res/res_pjsip_sdp_rtp.c | |
| parent | 5ff46578aa20921cf3649809a9be9b7231acc507 (diff) | |
bridge: Change participant SFU streams when source streams change.
Some endpoints do not like a stream being reused for a new
media stream. The frame/jitterbuffer can rely on underlying
attributes of the media stream in order to order the packets.
When a new stream takes its place without any notice the
buffer can get confused and the media ends up getting dropped.
This change uses the SSRC change to determine that a new source
is reusing an existing stream and then bridge_softmix renegotiates
each participant such that they see a new media stream. This
causes the frame/jitterbuffer to start fresh and work as expected.
ASTERISK-27277
Change-Id: I30ccbdba16ca073d7f31e0e59ab778c153afae07
Diffstat (limited to 'res/res_pjsip_sdp_rtp.c')
| -rw-r--r-- | res/res_pjsip_sdp_rtp.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/res/res_pjsip_sdp_rtp.c b/res/res_pjsip_sdp_rtp.c index e095f0660..88b94ee43 100644 --- a/res/res_pjsip_sdp_rtp.c +++ b/res/res_pjsip_sdp_rtp.c @@ -1022,6 +1022,19 @@ static void process_ssrc_attributes(struct ast_sip_session *session, struct ast_ continue; } + /* If we are currently negotiating as a result of the remote side renegotiating then + * determine if the source for this stream has changed. + */ + if (pjmedia_sdp_neg_get_state(session->inv_session->neg) == PJMEDIA_SDP_NEG_STATE_REMOTE_OFFER && + session->active_media_state) { + struct ast_rtp_instance_stats stats = { 0, }; + + if (!ast_rtp_instance_get_stats(session_media->rtp, &stats, AST_RTP_INSTANCE_STAT_REMOTE_SSRC) && + stats.remote_ssrc != ssrc) { + session_media->changed = 1; + } + } + ast_rtp_instance_set_remote_ssrc(session_media->rtp, ssrc); } } |