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session: make method to suggest available SSRC

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Make a method to suggest the best available SSRC. This is the SSRC of the last
created internal source and is used to instruct upstream to produce this
SSRC.
This commit is contained in:
Wim Taymans 2013-07-26 01:14:04 +02:00
parent 33ce50e8b1
commit c06482a2cb
3 changed files with 30 additions and 2 deletions
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3
gst/rtpmanager/gstrtpsession.c
View file

@ -1762,6 +1762,7 @@ gst_rtp_session_event_send_rtp_sink (GstPad * pad, GstObject * parent,
* because we stop sending. */
ret = gst_pad_push_event (rtpsession->send_rtp_src, event);
current_time = gst_clock_get_time (rtpsession->priv->sysclock);
GST_DEBUG_OBJECT (rtpsession, "scheduling BYE message");
rtp_session_mark_all_bye (rtpsession->priv->session, "End Of Stream");
rtp_session_schedule_bye (rtpsession->priv->session, current_time);
@ -1826,7 +1827,7 @@ gst_rtp_session_getcaps_send_rtp (GstPad * pad, GstRtpSession * rtpsession,
priv = rtpsession->priv;
ssrc = rtp_session_get_internal_ssrc (priv->session);
ssrc = rtp_session_suggest_ssrc (priv->session);
/* we can basically accept anything but we prefer to receive packets with our
* internal SSRC so that we don't have to patch it. Create a structure with

27
gst/rtpmanager/rtpsession.c
View file

@ -1297,8 +1297,11 @@ add_source (RTPSession * sess, RTPSource * src)
sess->total_sources++;
if (RTP_SOURCE_IS_ACTIVE (src))
sess->stats.active_sources++;
if (src->internal)
if (src->internal) {
sess->stats.internal_sources++;
if (sess->suggested_ssrc != src->ssrc)
sess->suggested_ssrc = src->ssrc;
}
}
/* must be called with the session lock, the returned source needs to be
@ -1457,6 +1460,28 @@ rtp_session_get_internal_ssrc (RTPSession * sess)
return ssrc;
}
/**
* rtp_session_suggest_ssrc:
* @sess: a #RTPSession
*
* Suggest an unused SSRC in @sess.
*
* Returns: a free unused SSRC
*/
guint32
rtp_session_suggest_ssrc (RTPSession * sess)
{
guint32 result;
g_return_val_if_fail (RTP_IS_SESSION (sess), 0);
RTP_SESSION_LOCK (sess);
result = sess->suggested_ssrc;
RTP_SESSION_UNLOCK (sess);
return result;
}
/**
* rtp_session_add_source:
* @sess: a #RTPSession

2
gst/rtpmanager/rtpsession.h
View file

@ -199,6 +199,7 @@ struct _RTPSession {
guint rtcp_rs_bandwidth;
RTPSource *source;
guint32 suggested_ssrc;
/* for sender/receiver counting */
guint32 key;
@ -310,6 +311,7 @@ RTPSource* rtp_session_get_internal_source (RTPSession *sess);
void rtp_session_set_internal_ssrc (RTPSession *sess, guint32 ssrc);
guint32 rtp_session_get_internal_ssrc (RTPSession *sess);
guint32 rtp_session_suggest_ssrc (RTPSession *sess);
gboolean rtp_session_add_source (RTPSession *sess, RTPSource *src);
guint rtp_session_get_num_sources (RTPSession *sess);