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gst/rtsp/gstrtspsrc.c: Improve udp port setup. Fixes #545710.

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Original commit message from CVS:
Patch by: Aurelien Grimaud <gstelzz at yahoo dot fr>
* gst/rtsp/gstrtspsrc.c: (gst_rtspsrc_alloc_udp_ports):
Improve udp port setup. Fixes #545710.
This commit is contained in:
Aurelien Grimaud 2008-08-05 13:57:57 +00:00 committed by Wim Taymans
parent 8f0079c7e2
commit 1e64691186
2 changed files with 58 additions and 39 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2008-08-05 Wim Taymans <wim.taymans@collabora.co.uk>
Patch by: Aurelien Grimaud <gstelzz at yahoo dot fr>
* gst/rtsp/gstrtspsrc.c: (gst_rtspsrc_alloc_udp_ports):
Improve udp port setup. Fixes #545710.
2008-08-05 Wim Taymans <wim.taymans@collabora.co.uk>
* gst/rtp/Makefile.am:

90
gst/rtsp/gstrtspsrc.c
View file

@ -1007,27 +1007,45 @@ gst_rtspsrc_alloc_udp_ports (GstRTSPStream * stream,
{
GstRTSPSrc *src;
GstStateChangeReturn ret;
GstElement *tmp, *udpsrc0, *udpsrc1;
GstElement *udpsrc0, *udpsrc1;
gint tmp_rtp, tmp_rtcp;
guint count;
src = stream->parent;
tmp = NULL;
udpsrc0 = NULL;
udpsrc1 = NULL;
count = 0;
/* Start with random port */
tmp_rtp = 0;
/* try to allocate 2 UDP ports, the RTP port should be an even
* number and the RTCP port should be the next (uneven) port */
again:
udpsrc0 = gst_element_make_from_uri (GST_URI_SRC, "udp://0.0.0.0:0", NULL);
udpsrc0 = gst_element_make_from_uri (GST_URI_SRC, "udp://0.0.0.0", NULL);
if (udpsrc0 == NULL)
goto no_udp_protocol;
g_object_set (G_OBJECT (udpsrc0), "port", tmp_rtp, NULL);
ret = gst_element_set_state (udpsrc0, GST_STATE_PAUSED);
if (ret == GST_STATE_CHANGE_FAILURE)
goto start_udp_failure;
if (ret == GST_STATE_CHANGE_FAILURE) {
if (tmp_rtp != 0) {
GST_DEBUG_OBJECT (src, "Unable to make udpsrc from RTP port %d", tmp_rtp);
tmp_rtp += 2;
if (++count > src->retry)
goto no_ports;
GST_DEBUG_OBJECT (src, "free RTP udpsrc");
gst_element_set_state (udpsrc0, GST_STATE_NULL);
gst_object_unref (udpsrc0);
GST_DEBUG_OBJECT (src, "retry %d", count);
goto again;
}
goto no_udp_protocol;
}
g_object_get (G_OBJECT (udpsrc0), "port", &tmp_rtp, NULL);
GST_DEBUG_OBJECT (src, "got RTP port %d", tmp_rtp);
@ -1035,27 +1053,19 @@ again:
/* check if port is even */
if ((tmp_rtp & 0x01) != 0) {
/* port not even, close and allocate another */
count++;
if (count > src->retry)
if (++count > src->retry)
goto no_ports;
GST_DEBUG_OBJECT (src, "RTP port not even, retry %d", count);
/* have to keep port allocated so we can get a new one */
if (tmp != NULL) {
GST_DEBUG_OBJECT (src, "free temp");
gst_element_set_state (tmp, GST_STATE_NULL);
gst_object_unref (tmp);
}
tmp = udpsrc0;
GST_DEBUG_OBJECT (src, "RTP port not even");
GST_DEBUG_OBJECT (src, "free RTP udpsrc");
gst_element_set_state (udpsrc0, GST_STATE_NULL);
gst_object_unref (udpsrc0);
GST_DEBUG_OBJECT (src, "retry %d", count);
tmp_rtp++;
goto again;
}
/* free leftover temp element/port */
if (tmp) {
gst_element_set_state (tmp, GST_STATE_NULL);
gst_object_unref (tmp);
tmp = NULL;
}
/* allocate port+1 for RTCP now */
udpsrc1 = gst_element_make_from_uri (GST_URI_SRC, "udp://0.0.0.0", NULL);
@ -1068,10 +1078,26 @@ again:
GST_DEBUG_OBJECT (src, "starting RTCP on port %d", tmp_rtcp);
ret = gst_element_set_state (udpsrc1, GST_STATE_PAUSED);
/* FIXME, this could fail if the next port is not free, we
* should retry with another port then */
if (ret == GST_STATE_CHANGE_FAILURE)
goto start_rtcp_failure;
/* tmp_rtcp port is busy already : retry to make rtp/rtcp pair */
if (ret == GST_STATE_CHANGE_FAILURE) {
GST_DEBUG_OBJECT (src, "Unable to make udpsrc from RTCP port %d", tmp_rtcp);
if (++count > src->retry)
goto no_ports;
GST_DEBUG_OBJECT (src, "free RTP udpsrc");
gst_element_set_state (udpsrc0, GST_STATE_NULL);
gst_object_unref (udpsrc0);
GST_DEBUG_OBJECT (src, "free RTCP udpsrc");
gst_element_set_state (udpsrc1, GST_STATE_NULL);
gst_object_unref (udpsrc1);
tmp_rtp += 2;
GST_DEBUG_OBJECT (src, "retry %d", count);
goto again;
}
/* all fine, do port check */
g_object_get (G_OBJECT (udpsrc0), "port", rtpport, NULL);
@ -1098,11 +1124,6 @@ no_udp_protocol:
GST_DEBUG_OBJECT (src, "could not get UDP source");
goto cleanup;
}
start_udp_failure:
{
GST_DEBUG_OBJECT (src, "could not start UDP source");
goto cleanup;
}
no_ports:
{
GST_DEBUG_OBJECT (src, "could not allocate UDP port pair after %d retries",
@ -1114,11 +1135,6 @@ no_udp_rtcp_protocol:
GST_DEBUG_OBJECT (src, "could not get UDP source for RTCP");
goto cleanup;
}
start_rtcp_failure:
{
GST_DEBUG_OBJECT (src, "could not start UDP source for RTCP");
goto cleanup;
}
port_error:
{
GST_DEBUG_OBJECT (src, "ports don't match rtp: %d<->%d, rtcp: %d<->%d",
@ -1127,10 +1143,6 @@ port_error:
}
cleanup:
{
if (tmp) {
gst_element_set_state (tmp, GST_STATE_NULL);
gst_object_unref (tmp);
}
if (udpsrc0) {
gst_element_set_state (udpsrc0, GST_STATE_NULL);
gst_object_unref (udpsrc0);