gstreamer/ext/webrtc/icestream.c

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/* GStreamer
* Copyright (C) 2017 Matthew Waters <matthew@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "icestream.h"
#include "nicetransport.h"
#define GST_CAT_DEFAULT gst_webrtc_ice_stream_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
#define gst_webrtc_ice_stream_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstWebRTCICEStream, gst_webrtc_ice_stream,
GST_TYPE_OBJECT,
GST_DEBUG_CATEGORY_INIT (gst_webrtc_ice_stream_debug,
"webrtcicestream", 0, "webrtcicestream"););
enum
{
SIGNAL_0,
LAST_SIGNAL,
};
enum
{
PROP_0,
PROP_ICE,
PROP_STREAM_ID,
};
//static guint gst_webrtc_ice_stream_signals[LAST_SIGNAL] = { 0 };
struct _GstWebRTCICEStreamPrivate
{
gboolean gathered;
GList *transports;
};
static void
gst_webrtc_ice_stream_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstWebRTCICEStream *stream = GST_WEBRTC_ICE_STREAM (object);
switch (prop_id) {
case PROP_ICE:
/* XXX: weak-ref this? */
stream->ice = g_value_get_object (value);
break;
case PROP_STREAM_ID:
stream->stream_id = g_value_get_uint (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_webrtc_ice_stream_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstWebRTCICEStream *stream = GST_WEBRTC_ICE_STREAM (object);
switch (prop_id) {
case PROP_ICE:
g_value_set_object (value, stream->ice);
break;
case PROP_STREAM_ID:
g_value_set_uint (value, stream->stream_id);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_webrtc_ice_stream_finalize (GObject * object)
{
GstWebRTCICEStream *stream = GST_WEBRTC_ICE_STREAM (object);
g_list_free (stream->priv->transports);
stream->priv->transports = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
_on_candidate_gathering_done (NiceAgent * agent, guint stream_id,
GstWebRTCICEStream * ice)
{
GList *l;
if (stream_id != ice->stream_id)
return;
GST_DEBUG_OBJECT (ice, "%u gathering done", stream_id);
ice->priv->gathered = TRUE;
for (l = ice->priv->transports; l; l = l->next) {
GstWebRTCICETransport *ice = l->data;
gst_webrtc_ice_transport_gathering_state_change (ice,
GST_WEBRTC_ICE_GATHERING_STATE_COMPLETE);
}
}
GstWebRTCICETransport *
gst_webrtc_ice_stream_find_transport (GstWebRTCICEStream * stream,
GstWebRTCICEComponent component)
{
GstWebRTCICEComponent trans_comp;
GstWebRTCICETransport *ret;
GList *l;
g_return_val_if_fail (GST_IS_WEBRTC_ICE_STREAM (stream), NULL);
for (l = stream->priv->transports; l; l = l->next) {
GstWebRTCICETransport *trans = l->data;
g_object_get (trans, "component", &trans_comp, NULL);
if (component == trans_comp)
return gst_object_ref (trans);
}
ret =
GST_WEBRTC_ICE_TRANSPORT (gst_webrtc_nice_transport_new (stream,
component));
stream->priv->transports = g_list_prepend (stream->priv->transports, ret);
return ret;
}
static void
gst_webrtc_ice_stream_constructed (GObject * object)
{
GstWebRTCICEStream *stream = GST_WEBRTC_ICE_STREAM (object);
NiceAgent *agent;
g_object_get (stream->ice, "agent", &agent, NULL);
g_signal_connect (agent, "candidate-gathering-done",
G_CALLBACK (_on_candidate_gathering_done), stream);
g_object_unref (agent);
G_OBJECT_CLASS (parent_class)->constructed (object);
}
gboolean
gst_webrtc_ice_stream_gather_candidates (GstWebRTCICEStream * stream)
{
NiceAgent *agent;
GList *l;
g_return_val_if_fail (GST_IS_WEBRTC_ICE_STREAM (stream), FALSE);
GST_DEBUG_OBJECT (stream, "start gathering candidates");
if (stream->priv->gathered)
return TRUE;
for (l = stream->priv->transports; l; l = l->next) {
GstWebRTCICETransport *trans = l->data;
gst_webrtc_ice_transport_gathering_state_change (trans,
GST_WEBRTC_ICE_GATHERING_STATE_GATHERING);
}
g_object_get (stream->ice, "agent", &agent, NULL);
if (!nice_agent_gather_candidates (agent, stream->stream_id)) {
g_object_unref (agent);
return FALSE;
}
g_object_unref (agent);
return TRUE;
}
static void
gst_webrtc_ice_stream_class_init (GstWebRTCICEStreamClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
g_type_class_add_private (klass, sizeof (GstWebRTCICEStreamPrivate));
gobject_class->constructed = gst_webrtc_ice_stream_constructed;
gobject_class->get_property = gst_webrtc_ice_stream_get_property;
gobject_class->set_property = gst_webrtc_ice_stream_set_property;
gobject_class->finalize = gst_webrtc_ice_stream_finalize;
g_object_class_install_property (gobject_class,
PROP_ICE,
g_param_spec_object ("ice",
"ICE", "ICE agent associated with this stream",
GST_TYPE_WEBRTC_ICE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_STREAM_ID,
g_param_spec_uint ("stream-id",
"ICE stream id", "ICE stream id associated with this stream",
0, G_MAXUINT, 0,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
}
static void
gst_webrtc_ice_stream_init (GstWebRTCICEStream * ice)
{
ice->priv =
G_TYPE_INSTANCE_GET_PRIVATE ((ice), GST_TYPE_WEBRTC_ICE_STREAM,
GstWebRTCICEStreamPrivate);
}
GstWebRTCICEStream *
gst_webrtc_ice_stream_new (GstWebRTCICE * ice, guint stream_id)
{
return g_object_new (GST_TYPE_WEBRTC_ICE_STREAM, "ice", ice,
"stream-id", stream_id, NULL);
}