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sip: media-pipeline: Let the OS allocate sockets for udpsrc

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First of we get rid of the bindings between from "lport-rtp" and "lport-rtcp" to
the "port" property of the udpsrc elements. The properties themselves will get
removed a little later as the required changes are rather intrusive and we need
some more infrastructure in place before we can do the switch.
This commit is contained in:
Evangelos Ribeiro Tzaras 2022-02-28 09:49:43 +01:00
parent f3a6c15e6a
commit 53d6082d64
2 changed files with 40 additions and 19 deletions
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57
plugins/sip/calls-sip-media-pipeline.c
View file

@ -295,7 +295,7 @@ send_pipeline_setup_codecs (CallsSipMediaPipeline *self,
return send_pipeline_link_elements (self, error);
}
/** TODO: we're describing the desired state (not the current state)
/**
* Prepare a skeleton send pipeline where we can later
* plug the codec specific elements into.
*
@ -363,10 +363,6 @@ send_pipeline_init (CallsSipMediaPipeline *self,
self->rtp_sink, "host",
G_BINDING_BIDIRECTIONAL);
g_object_bind_property (self, "lport-rtcp",
self->rtcp_send_src, "port",
G_BINDING_BIDIRECTIONAL);
g_object_bind_property (self, "rport-rtcp",
self->rtcp_send_sink, "port",
G_BINDING_BIDIRECTIONAL);
@ -375,6 +371,8 @@ send_pipeline_init (CallsSipMediaPipeline *self,
self->rtcp_send_sink, "host",
G_BINDING_BIDIRECTIONAL);
/* TODO bind sockets */
gst_bin_add (GST_BIN (self->send_pipeline), self->send_rtpbin);
gst_bin_add_many (GST_BIN (self->send_pipeline), self->rtp_sink,
self->rtcp_send_src, self->rtcp_send_sink, NULL);
@ -485,17 +483,16 @@ recv_pipeline_setup_codecs (CallsSipMediaPipeline *self,
}
/** TODO: we're describing the desired state (not the current state)
/**
* Prepares a skeleton receiver pipeline which can later be
* used to plug codec specific element in.
* This pipeline just consists of (minimally linked) rtpbin
* audio sink and two udpsrc elements, one for RTP and one for RTCP.
*
* The pipeline will be started and stopped to let the OS allocate
* sockets for us instead of building and providing GSockets ourselves
* by hand. These GSockets will later be reused for any outgoing
* traffic for of our hole punching scheme as a simple NAT traversal
* technique.
* The pipeline will be set ready to let the OS allocate sockets
* for us instead of building and providing GSockets ourselves
* by hand. These GSockets are reused for any outgoing traffic in our
* hole punching scheme as a simple NAT traversal technique.
*/
static gboolean
recv_pipeline_init (CallsSipMediaPipeline *self,
@ -550,13 +547,9 @@ recv_pipeline_init (CallsSipMediaPipeline *self,
NULL);
g_object_bind_property (self, "lport-rtp",
self->rtp_src, "port",
G_BINDING_BIDIRECTIONAL);
g_object_bind_property (self, "lport-rtcp",
self->rtcp_recv_src, "port",
G_BINDING_BIDIRECTIONAL);
/* port 0 means allocate */
g_object_set (self->rtp_src, "port", 0, NULL);
g_object_set (self->rtcp_recv_src, "port", 0, NULL);
g_object_bind_property (self, "rport-rtcp",
self->rtcp_recv_sink, "port",
@ -570,10 +563,11 @@ recv_pipeline_init (CallsSipMediaPipeline *self,
gst_bin_add_many (GST_BIN (self->recv_pipeline), self->rtp_src,
self->rtcp_recv_src, self->rtcp_recv_sink, NULL);
/* TODO use temporary bus watch for the initial pipeline start/stop */
self->bus_recv = gst_pipeline_get_bus (GST_PIPELINE (self->recv_pipeline));
self->bus_watch_recv = gst_bus_add_watch (self->bus_recv, on_bus_message, self);
/* Set pipeline to ready to get ports allocated */
gst_element_set_state (self->recv_pipeline, GST_STATE_READY);
return TRUE;
}
@ -973,4 +967,29 @@ calls_sip_media_pipeline_pause (CallsSipMediaPipeline *self,
}
int
calls_sip_media_pipeline_get_rtp_port (CallsSipMediaPipeline *self)
{
int port;
g_return_val_if_fail (CALLS_IS_SIP_MEDIA_PIPELINE (self), 0);
g_object_get (self->rtp_src, "port", &port, NULL);
return port;
}
int
calls_sip_media_pipeline_get_rtcp_port (CallsSipMediaPipeline *self)
{
int port;
g_return_val_if_fail (CALLS_IS_SIP_MEDIA_PIPELINE (self), 0);
g_object_get (self->rtcp_recv_src, "port", &port, NULL);
return port;
}
#undef MAKE_ELEMENT

2
plugins/sip/calls-sip-media-pipeline.h
View file

@ -42,5 +42,7 @@ void calls_sip_media_pipeline_start (CallsSip
void calls_sip_media_pipeline_stop (CallsSipMediaPipeline *self);
void calls_sip_media_pipeline_pause (CallsSipMediaPipeline *self,
gboolean pause);
int calls_sip_media_pipeline_get_rtp_port (CallsSipMediaPipeline *self);
int calls_sip_media_pipeline_get_rtcp_port (CallsSipMediaPipeline *self);
G_END_DECLS