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gstreamer/gst/rist/gstristsink.c
Nicolas Dufresne af741f0723 rist: Use g_signal_connect_object() 
rtpbin can still emit signals when it is being disposed, and while
rtpbin is inside ristsrc/ristsink it can still live longer.

So we either have disconnect all signals at some point, or let GObject
take care of that automatically.

Related to !1412

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1413>
2020-07-07 15:37:57 +00:00

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/* GStreamer RIST plugin
* Copyright (C) 2019 Net Insight AB
* Author: Nicolas Dufresne <nicolas.dufresne@collabora.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.
*/
/**
* SECTION:element-ristsink
* @title: ristsink
* @see_also: ristsrc
*
* This element implements RIST TR-06-1 Simple Profile transmitter. It
* currently supports any registered RTP static payload types such as
* MPEG TS. The stream passed to this element must be already RTP
* payloaded. Even though RTP SSRC collision are rare in
* unidirectional streaming, this element expects the upstream elements
* to obey to collision events and change the SSRC in use. Collisions
* will occur when transmitting and receiving over multicast on the
* same host, and will be properly ignored.
*
* It also implements part of the RIST TR-06-2 Main Profile transmitter. The
* tunneling, multiplexing and encryption parts of the specification are not
* included. This element will include the RIST header extension if either of
* the "sequence-number-extension" or "drop-null-ts-packets" properties are set.
*
* ## Example gst-launch line
* |[
* gst-launch-1.0 udpsrc ! tsparse set-timestamps=1 smoothing-latency=40000 ! \
* rtpmp2tpay ! ristsink address=10.0.0.1 port=5004
* ]|
*
* Additionally, this element supports bonding, which consist of using
* multiple links in order to transmit the streams. The address of
* each link is configured through the "bonding-addresses"
* property. When set, this will replace the value that might have
* been set on the "address" and "port" properties. Each link will be
* mapped to its own RTP session. RTX request are only replied to on the
* link the NACK was received from.
*
* There are currently two bonding methods in place: "broadcast" and "round-robin".
* In "broadcast" mode, all the packets are duplicated over all sessions.
* While in "round-robin" mode, packets are evenly distributed over the links. One
* can also implement its own dispatcher element and configure it using the
* "dispatcher" property. As a reference, "broadcast" mode is implemented with
* the "tee" element, while "round-robin" mode is implemented with the
* "round-robin" element.
*
* ## Example gst-launch line for bonding
* |[
* gst-launch-1.0 udpsrc ! tsparse set-timestamps=1 smoothing-latency=40000 ! \
* rtpmp2tpay ! ristsink bonding-addresses="10.0.0.1:5004,11.0.0.1:5006"
* ]|
*/
/* using GValueArray, which has not replacement */
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gio/gio.h>
#include <gst/rtp/rtp.h>
/* for strtol() */
#include <stdlib.h>
#include "gstrist.h"
GST_DEBUG_CATEGORY_STATIC (gst_rist_sink_debug);
#define GST_CAT_DEFAULT gst_rist_sink_debug
enum
{
PROP_ADDRESS = 1,
PROP_PORT,
PROP_SENDER_BUFFER,
PROP_MIN_RTCP_INTERVAL,
PROP_MAX_RTCP_BANDWIDTH,
PROP_STATS_UPDATE_INTERVAL,
PROP_STATS,
PROP_CNAME,
PROP_MULTICAST_LOOPBACK,
PROP_MULTICAST_IFACE,
PROP_MULTICAST_TTL,
PROP_BONDING_ADDRESSES,
PROP_BONDING_METHOD,
PROP_DISPATCHER,
PROP_DROP_NULL_TS_PACKETS,
PROP_SEQUENCE_NUMBER_EXTENSION
};
typedef enum
{
GST_RIST_BONDING_METHOD_BROADCAST,
GST_RIST_BONDING_METHOD_ROUND_ROBIN,
} GstRistBondingMethod;
static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp"));
typedef struct
{
guint session;
gchar *address;
gchar *multicast_iface;
guint port;
GstElement *rtcp_src;
GstElement *rtp_sink;
GstElement *rtcp_sink;
GstElement *rtx_send;
GstElement *rtx_queue;
guint32 rtcp_ssrc;
} RistSenderBond;
struct _GstRistSink
{
GstBin parent;
/* Common elements in the pipeline */
GstElement *rtpbin;
GstElement *ssrc_filter;
GstPad *sinkpad;
GstElement *rtxbin;
GstElement *dispatcher;
GstElement *rtpext;
/* Common properties, protected by bonds_lock */
gint multicast_ttl;
gboolean multicast_loopback;
GstClockTime min_rtcp_interval;
gdouble max_rtcp_bandwidth;
GstRistBondingMethod bonding_method;
/* Bonds */
GPtrArray *bonds;
/* this is needed as setting sibling properties will try to take the object
* lock. Thus, any properties that affects the bonds will be protected with
* that lock instead of the object lock. */
GMutex bonds_lock;
/* For stats */
guint stats_interval;
guint32 rtp_ssrc;
GstClockID stats_cid;
/* This is set whenever there is a pipeline construction failure, and used
* to fail state changes later */
gboolean construct_failed;
const gchar *missing_plugin;
};
static GType
gst_rist_bonding_method_get_type (void)
{
static gsize id = 0;
static const GEnumValue values[] = {
{GST_RIST_BONDING_METHOD_BROADCAST,
"GST_RIST_BONDING_METHOD_BROADCAST", "broadcast"},
{GST_RIST_BONDING_METHOD_ROUND_ROBIN,
"GST_RIST_BONDING_METHOD_ROUND_ROBIN", "round-robin"},
{0, NULL, NULL}
};
if (g_once_init_enter (&id)) {
GType tmp = g_enum_register_static ("GstRistBondingMethodType", values);
g_once_init_leave (&id, tmp);
}
return (GType) id;
}
G_DEFINE_TYPE_WITH_CODE (GstRistSink, gst_rist_sink, GST_TYPE_BIN,
GST_DEBUG_CATEGORY_INIT (gst_rist_sink_debug, "ristsink", 0, "RIST Sink"));
GQuark session_id_quark = 0;
static RistSenderBond *
gst_rist_sink_add_bond (GstRistSink * sink)
{
RistSenderBond *bond = g_slice_new0 (RistSenderBond);
GstPad *pad, *gpad;
gchar name[32];
bond->session = sink->bonds->len;
bond->address = g_strdup ("localhost");
g_snprintf (name, 32, "rist_rtp_udpsink%u", bond->session);
bond->rtp_sink = gst_element_factory_make ("udpsink", name);
if (!bond->rtp_sink) {
g_slice_free (RistSenderBond, bond);
sink->missing_plugin = "udp";
return NULL;
}
/* these are all from UDP plugin, so they cannot fail */
g_snprintf (name, 32, "rist_rtcp_udpsrc%u", bond->session);
bond->rtcp_src = gst_element_factory_make ("udpsrc", name);
g_snprintf (name, 32, "rist_rtcp_udpsink%u", bond->session);
bond->rtcp_sink = gst_element_factory_make ("udpsink", name);
g_object_set (bond->rtcp_sink, "async", FALSE, NULL);
gst_bin_add_many (GST_BIN (sink), bond->rtp_sink, bond->rtcp_src,
bond->rtcp_sink, NULL);
gst_element_set_locked_state (bond->rtcp_src, TRUE);
gst_element_set_locked_state (bond->rtcp_sink, TRUE);
g_snprintf (name, 32, "rist_rtx_queue%u", bond->session);
bond->rtx_queue = gst_element_factory_make ("queue", name);
gst_bin_add (GST_BIN (sink->rtxbin), bond->rtx_queue);
g_snprintf (name, 32, "rist_rtx_send%u", bond->session);
bond->rtx_send = gst_element_factory_make ("ristrtxsend", name);
if (!bond->rtx_send) {
sink->missing_plugin = "rtpmanager";
g_slice_free (RistSenderBond, bond);
return NULL;
}
gst_bin_add (GST_BIN (sink->rtxbin), bond->rtx_send);
gst_element_link (bond->rtx_queue, bond->rtx_send);
pad = gst_element_get_static_pad (bond->rtx_send, "src");
g_snprintf (name, 32, "src_%u", bond->session);
gpad = gst_ghost_pad_new (name, pad);
gst_object_unref (pad);
gst_element_add_pad (sink->rtxbin, gpad);
g_object_set (bond->rtx_send, "max-size-packets", 0, NULL);
g_snprintf (name, 32, "send_rtp_sink_%u", bond->session);
if (bond->session == 0) {
gst_element_link_pads (sink->ssrc_filter, "src", sink->rtpbin, name);
} else {
GstPad *pad;
/* to make a sender, we need to create an unused pad on rtpbin, which will
* require an unused pad on the rtxbin */
g_snprintf (name, 32, "sink_%u", bond->session);
pad = gst_ghost_pad_new_no_target (name, GST_PAD_SINK);
gst_element_add_pad (sink->rtxbin, pad);
g_snprintf (name, 32, "send_rtp_sink_%u", bond->session);
pad = gst_element_get_request_pad (sink->rtpbin, name);
gst_object_unref (pad);
}
g_snprintf (name, 32, "send_rtp_src_%u", bond->session);
gst_element_link_pads (sink->rtpbin, name, bond->rtp_sink, "sink");
g_snprintf (name, 32, "recv_rtcp_sink_%u", bond->session);
gst_element_link_pads (bond->rtcp_src, "src", sink->rtpbin, name);
g_snprintf (name, 32, "send_rtcp_src_%u", bond->session);
gst_element_link_pads (sink->rtpbin, name, bond->rtcp_sink, "sink");
g_ptr_array_add (sink->bonds, bond);
return bond;
}
static GstCaps *
gst_rist_sink_request_pt_map (GstRistSrc * sink, guint session_id, guint pt,
GstElement * rtpbin)
{
const GstRTPPayloadInfo *pt_info;
GstCaps *ret;
pt_info = gst_rtp_payload_info_for_pt (pt);
if (!pt_info || !pt_info->clock_rate)
return NULL;
ret = gst_caps_new_simple ("application/x-rtp",
"media", G_TYPE_STRING, pt_info->media,
"encoding_name", G_TYPE_STRING, pt_info->encoding_name,
"clock-rate", G_TYPE_INT, (gint) pt_info->clock_rate, NULL);
/* FIXME add sprop-parameter-set if any */
g_warn_if_fail (pt_info->encoding_parameters == NULL);
return ret;
}
static GstElement *
gst_rist_sink_request_aux_sender (GstRistSink * sink, guint session_id,
GstElement * rtpbin)
{
return gst_object_ref (sink->rtxbin);
}
static void
on_receiving_rtcp (GObject * session, GstBuffer * buffer, GstRistSink * sink)
{
RistSenderBond *bond = NULL;
GstRTCPBuffer rtcp = GST_RTCP_BUFFER_INIT;
if (gst_rtcp_buffer_map (buffer, GST_MAP_READ, &rtcp)) {
GstRTCPPacket packet;
if (gst_rtcp_buffer_get_first_packet (&rtcp, &packet)) {
/* Always skip the first one as it's never a FB or APP packet */
while (gst_rtcp_packet_move_to_next (&packet)) {
guint32 ssrc;
switch (gst_rtcp_packet_get_type (&packet)) {
case GST_RTCP_TYPE_APP:
if (memcmp (gst_rtcp_packet_app_get_name (&packet), "RIST", 4) == 0)
ssrc = gst_rtcp_packet_app_get_ssrc (&packet);
else
continue;
break;
case GST_RTCP_TYPE_RTPFB:
if (gst_rtcp_packet_fb_get_type (&packet) ==
GST_RTCP_RTPFB_TYPE_NACK)
ssrc = gst_rtcp_packet_fb_get_media_ssrc (&packet);
else
continue;
break;
default:
continue;
}
/* The SSRC could be that of the original data or the
* retransmission. So for the last bit to 0.
*/
ssrc &= 0xFFFFFFFE;
if (bond == NULL) {
guint session_id =
GPOINTER_TO_UINT (g_object_get_qdata (session, session_id_quark));
bond = g_ptr_array_index (sink->bonds, session_id);
if (bond == NULL) {
g_critical ("Can't find session id %u", session_id);
goto done;
}
}
gst_rist_rtx_send_clear_extseqnum (GST_RIST_RTX_SEND (bond->rtx_send),
ssrc);
}
}
done:
gst_rtcp_buffer_unmap (&rtcp);
}
}
static void
on_app_rtcp (GObject * session, guint32 subtype, guint32 ssrc,
const gchar * name, GstBuffer * data, GstRistSink * sink)
{
if (g_str_equal (name, "RIST")) {
guint session_id =
GPOINTER_TO_UINT (g_object_get_qdata (session, session_id_quark));
if (subtype == 0) {
GstEvent *event;
GstPad *send_rtp_sink;
GstMapInfo map;
gint i;
GstElement *gstsession;
g_signal_emit_by_name (sink->rtpbin, "get-session", session_id,
&gstsession);
send_rtp_sink = gst_element_get_static_pad (gstsession, "send_rtp_sink");
if (send_rtp_sink) {
gst_buffer_map (data, &map, GST_MAP_READ);
for (i = 0; i < map.size; i += sizeof (guint32)) {
guint32 dword = GST_READ_UINT32_BE (map.data + i);
guint16 seqnum = dword >> 16;
guint16 num = dword & 0x0000FFFF;
guint16 j;
GST_DEBUG ("got RIST nack packet, #%u %u", seqnum, num);
/* num is inclusive, i.e. it can be 0, which means exactly 1 seqnum */
for (j = 0; j <= num; j++) {
event = gst_event_new_custom (GST_EVENT_CUSTOM_UPSTREAM,
gst_structure_new ("GstRTPRetransmissionRequest",
"seqnum", G_TYPE_UINT, (guint) seqnum + j,
"ssrc", G_TYPE_UINT, (guint) ssrc, NULL));
gst_pad_push_event (send_rtp_sink, event);
}
}
gst_buffer_unmap (data, &map);
gst_object_unref (send_rtp_sink);
}
} else if (subtype == 1) {
GstMapInfo map;
RistSenderBond *bond;
guint16 seqnum_ext;
bond = g_ptr_array_index (sink->bonds, session_id);
if (gst_buffer_get_size (data) < 4) {
if (bond)
gst_rist_rtx_send_clear_extseqnum (GST_RIST_RTX_SEND (bond->rtx_send),
ssrc);
GST_WARNING_OBJECT (sink, "RIST APP RTCP packet is too small,"
" it's %zu bytes, less than the expected 4 bytes",
gst_buffer_get_size (data));
return;
}
gst_buffer_map (data, &map, GST_MAP_READ);
seqnum_ext = GST_READ_UINT16_BE (map.data);
gst_buffer_unmap (data, &map);
if (bond)
gst_rist_rtx_send_set_extseqnum (GST_RIST_RTX_SEND (bond->rtx_send),
ssrc, seqnum_ext);
}
}
}
static void
gst_rist_sink_on_new_sender_ssrc (GstRistSink * sink, guint session_id,
guint ssrc, GstElement * rtpbin)
{
GObject *gstsession = NULL;
GObject *session = NULL;
GObject *source = NULL;
if (session_id != 0)
return;
g_signal_emit_by_name (rtpbin, "get-session", session_id, &gstsession);
g_signal_emit_by_name (rtpbin, "get-internal-session", session_id, &session);
g_signal_emit_by_name (session, "get-source-by-ssrc", ssrc, &source);
g_object_set_qdata (session, session_id_quark, GUINT_TO_POINTER (session_id));
if (ssrc & 1) {
g_object_set (source, "disable-rtcp", TRUE, NULL);
} else {
g_signal_connect_object (session, "on-app-rtcp",
(GCallback) on_app_rtcp, sink, 0);
g_signal_connect_object (session, "on-receiving-rtcp",
(GCallback) on_receiving_rtcp, sink, 0);
}
g_object_unref (source);
g_object_unref (session);
}
static void
gst_rist_sink_on_new_receiver_ssrc (GstRistSink * sink, guint session_id,
guint ssrc, GstElement * rtpbin)
{
RistSenderBond *bond;
if (session_id != 0)
return;
GST_INFO_OBJECT (sink, "Got RTCP remote SSRC %u", ssrc);
bond = g_ptr_array_index (sink->bonds, session_id);
bond->rtcp_ssrc = ssrc;
}
static GstPadProbeReturn
gst_rist_sink_fix_collision (GstPad * pad, GstPadProbeInfo * info,
gpointer user_data)
{
GstEvent *event = info->data;
const GstStructure *cs;
GstStructure *s;
guint ssrc;
/* We simply ignore collisions */
if (GST_EVENT_TYPE (event) != GST_EVENT_CUSTOM_UPSTREAM)
return GST_PAD_PROBE_OK;
cs = gst_event_get_structure (event);
if (!gst_structure_has_name (cs, "GstRTPCollision"))
return GST_PAD_PROBE_OK;
gst_structure_get_uint (cs, "suggested-ssrc", &ssrc);
if ((ssrc & 1) == 0)
return GST_PAD_PROBE_OK;
event = info->data = gst_event_make_writable (event);
/* we can drop the const qualifier as we ensured writability */
s = (GstStructure *) gst_event_get_structure (event);
gst_structure_set (s, "suggested-ssrc", G_TYPE_UINT, ssrc - 1, NULL);
return GST_PAD_PROBE_OK;
}
static gboolean
gst_rist_sink_set_caps (GstRistSink * sink, GstCaps * caps)
{
const GstStructure *s = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_uint (s, "ssrc", &sink->rtp_ssrc)) {
GST_ELEMENT_ERROR (sink, CORE, NEGOTIATION, ("No 'ssrc' field in caps."),
(NULL));
return FALSE;
}
if (sink->rtp_ssrc & 1) {
GST_ELEMENT_ERROR (sink, CORE, NEGOTIATION,
("Invalid RIST SSRC, LSB must be zero."), (NULL));
return FALSE;
}
return TRUE;
}
static gboolean
gst_rist_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstRistSink *sink = GST_RIST_SINK (parent);
GstCaps *caps;
gboolean ret = TRUE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
gst_event_parse_caps (event, &caps);
ret = gst_rist_sink_set_caps (sink, caps);
break;
default:
break;
}
if (ret)
ret = gst_pad_event_default (pad, parent, event);
else
gst_event_unref (event);
return ret;
}
static void
gst_rist_sink_init (GstRistSink * sink)
{
GstPad *ssrc_filter_sinkpad, *rtxbin_gpad;
GstCaps *ssrc_caps;
GstStructure *sdes = NULL;
RistSenderBond *bond;
sink->rtpext = gst_element_factory_make ("ristrtpext", "ristrtpext");
g_mutex_init (&sink->bonds_lock);
sink->bonds = g_ptr_array_new ();
/* Construct the RIST RTP sender pipeline.
*
* capsfilter*-> [send_rtp_sink_%u] -------- [send_rtp_src_%u] -> udpsink
* | rtpbin |
* udpsrc -> [recv_rtcp_sink_%u] -------- [send_rtcp_src_%u] -> * udpsink
*
* * To select RIST compatible SSRC
*/
sink->rtpbin = gst_element_factory_make ("rtpbin", "rist_send_rtpbin");
if (!sink->rtpbin) {
sink->missing_plugin = "rtpmanager";
goto missing_plugin;
}
/* RIST specification says the SDES should only contain the CNAME */
g_object_get (sink->rtpbin, "sdes", &sdes, NULL);
gst_structure_remove_field (sdes, "tool");
gst_bin_add (GST_BIN (sink), sink->rtpbin);
g_object_set (sink->rtpbin, "do-retransmission", TRUE,
"rtp-profile", 3 /* AVFP */ ,
"sdes", sdes, NULL);
gst_structure_free (sdes);
g_signal_connect_object (sink->rtpbin, "request-pt-map",
G_CALLBACK (gst_rist_sink_request_pt_map), sink, G_CONNECT_SWAPPED);
g_signal_connect_object (sink->rtpbin, "request-aux-sender",
G_CALLBACK (gst_rist_sink_request_aux_sender), sink, G_CONNECT_SWAPPED);
g_signal_connect_object (sink->rtpbin, "on-new-sender-ssrc",
G_CALLBACK (gst_rist_sink_on_new_sender_ssrc), sink, G_CONNECT_SWAPPED);
g_signal_connect_object (sink->rtpbin, "on-new-ssrc",
G_CALLBACK (gst_rist_sink_on_new_receiver_ssrc), sink, G_CONNECT_SWAPPED);
sink->rtxbin = gst_bin_new ("rist_send_rtxbin");
g_object_ref_sink (sink->rtxbin);
rtxbin_gpad = gst_ghost_pad_new_no_target ("sink_0", GST_PAD_SINK);
gst_element_add_pad (sink->rtxbin, rtxbin_gpad);
sink->ssrc_filter = gst_element_factory_make ("capsfilter",
"rist_ssrc_filter");
gst_bin_add (GST_BIN (sink), sink->ssrc_filter);
/* RIST RTP SSRC should have LSB set to 0 */
sink->rtp_ssrc = g_random_int () & ~1;
ssrc_caps = gst_caps_new_simple ("application/x-rtp",
"ssrc", G_TYPE_UINT, sink->rtp_ssrc, NULL);
gst_caps_append_structure (ssrc_caps,
gst_structure_new_empty ("application/x-rtp"));
g_object_set (sink->ssrc_filter, "caps", ssrc_caps, NULL);
gst_caps_unref (ssrc_caps);
ssrc_filter_sinkpad = gst_element_get_static_pad (sink->ssrc_filter, "sink");
sink->sinkpad = gst_ghost_pad_new_from_template ("sink", ssrc_filter_sinkpad,
gst_static_pad_template_get (&sink_templ));
gst_pad_set_event_function (sink->sinkpad, gst_rist_sink_event);
gst_element_add_pad (GST_ELEMENT (sink), sink->sinkpad);
gst_object_unref (ssrc_filter_sinkpad);
gst_pad_add_probe (sink->sinkpad, GST_PAD_PROBE_TYPE_EVENT_UPSTREAM,
gst_rist_sink_fix_collision, sink, NULL);
bond = gst_rist_sink_add_bond (sink);
if (!bond)
goto missing_plugin;
return;
missing_plugin:
{
GST_ERROR_OBJECT (sink, "'%s' plugin is missing.", sink->missing_plugin);
sink->construct_failed = TRUE;
/* Just make our element valid, so we fail cleanly */
gst_element_add_pad (GST_ELEMENT (sink),
gst_pad_new_from_static_template (&sink_templ, "sink"));
}
}
static gboolean
gst_rist_sink_setup_rtcp_socket (GstRistSink * sink, RistSenderBond * bond)
{
GSocket *socket = NULL;
GInetAddress *iaddr = NULL;
gchar *remote_addr = NULL;
guint port = bond->port + 1;
GError *error = NULL;
iaddr = g_inet_address_new_from_string (bond->address);
if (!iaddr) {
GList *results;
GResolver *resolver = NULL;
resolver = g_resolver_get_default ();
results = g_resolver_lookup_by_name (resolver, bond->address, NULL, &error);
if (!results) {
g_object_unref (resolver);
goto dns_resolve_failed;
}
iaddr = G_INET_ADDRESS (g_object_ref (results->data));
g_resolver_free_addresses (results);
g_object_unref (resolver);
}
remote_addr = g_inet_address_to_string (iaddr);
if (g_inet_address_get_is_multicast (iaddr)) {
g_object_set (bond->rtcp_src, "address", remote_addr, "port", port, NULL);
} else {
const gchar *any_addr;
if (g_inet_address_get_family (iaddr) == G_SOCKET_FAMILY_IPV6)
any_addr = "::";
else
any_addr = "0.0.0.0";
g_object_set (bond->rtcp_src, "address", any_addr, "port", 0, NULL);
}
g_free (remote_addr);
g_object_unref (iaddr);
gst_element_set_locked_state (bond->rtcp_src, FALSE);
gst_element_sync_state_with_parent (bond->rtcp_src);
/* share the socket created by the sink */
g_object_get (bond->rtcp_src, "used-socket", &socket, NULL);
g_object_set (bond->rtcp_sink, "socket", socket, "auto-multicast", FALSE,
"close-socket", FALSE, NULL);
g_object_unref (socket);
gst_element_set_locked_state (bond->rtcp_sink, FALSE);
gst_element_sync_state_with_parent (bond->rtcp_sink);
return GST_STATE_CHANGE_SUCCESS;
dns_resolve_failed:
GST_ELEMENT_ERROR (sink, RESOURCE, NOT_FOUND,
("Could not resolve hostname '%s'", GST_STR_NULL (remote_addr)),
("DNS resolver reported: %s", error->message));
g_free (remote_addr);
g_object_unref (iaddr);
g_error_free (error);
return GST_STATE_CHANGE_FAILURE;
}
static GstStateChangeReturn
gst_rist_sink_start (GstRistSink * sink)
{
GstPad *rtxbin_gpad, *rtpext_sinkpad;
gint i;
/* Unless a custom dispatcher was provided, use the specified bonding method
* to create one */
if (!sink->dispatcher) {
switch (sink->bonding_method) {
case GST_RIST_BONDING_METHOD_BROADCAST:
sink->dispatcher = gst_element_factory_make ("tee", "rist_dispatcher");
if (!sink->dispatcher) {
sink->missing_plugin = "coreelements";
sink->construct_failed = TRUE;
}
break;
case GST_RIST_BONDING_METHOD_ROUND_ROBIN:
sink->dispatcher = gst_element_factory_make ("roundrobin",
"rist_dispatcher");
g_assert (sink->dispatcher);
break;
}
}
if (sink->construct_failed) {
GST_ELEMENT_ERROR (sink, CORE, MISSING_PLUGIN,
("Your GStreamer installation is missing plugin '%s'",
sink->missing_plugin), (NULL));
return GST_STATE_CHANGE_FAILURE;
}
gst_bin_add (GST_BIN (sink), sink->rtpext);
rtxbin_gpad = gst_element_get_static_pad (sink->rtxbin, "sink_0");
rtpext_sinkpad = gst_element_get_static_pad (sink->rtpext, "sink");
gst_ghost_pad_set_target (GST_GHOST_PAD (rtxbin_gpad), rtpext_sinkpad);
gst_object_unref (rtpext_sinkpad);
gst_bin_add (GST_BIN (sink->rtxbin), sink->dispatcher);
gst_element_link (sink->rtpext, sink->dispatcher);
for (i = 0; i < sink->bonds->len; i++) {
RistSenderBond *bond = g_ptr_array_index (sink->bonds, i);
GObject *session = NULL;
GstPad *pad;
gchar name[32];
g_signal_emit_by_name (sink->rtpbin, "get-session", i, &session);
g_object_set (session, "rtcp-min-interval", sink->min_rtcp_interval,
"rtcp-fraction", sink->max_rtcp_bandwidth, NULL);
g_object_unref (session);
g_snprintf (name, 32, "src_%u", bond->session);
pad = gst_element_get_request_pad (sink->dispatcher, name);
gst_element_link_pads (sink->dispatcher, name, bond->rtx_queue, "sink");
gst_object_unref (pad);
if (!gst_rist_sink_setup_rtcp_socket (sink, bond))
return GST_STATE_CHANGE_FAILURE;
}
return GST_STATE_CHANGE_SUCCESS;
}
static GstStructure *
gst_rist_sink_create_stats (GstRistSink * sink)
{
RistSenderBond *bond;
GstStructure *ret;
GValueArray *session_stats;
guint64 total_pkt_sent = 0, total_rtx_sent = 0;
gint i;
ret = gst_structure_new_empty ("rist/x-sender-stats");
session_stats = g_value_array_new (sink->bonds->len);
for (i = 0; i < sink->bonds->len; i++) {
GObject *session = NULL, *source = NULL;
GstStructure *sstats = NULL, *stats;
guint64 pkt_sent = 0, rtx_sent = 0, rtt;
guint rb_rtt = 0;
GValue value = G_VALUE_INIT;
g_signal_emit_by_name (sink->rtpbin, "get-internal-session", i, &session);
if (!session)
continue;
stats = gst_structure_new_empty ("rist/x-sender-session-stats");
bond = g_ptr_array_index (sink->bonds, i);
g_signal_emit_by_name (session, "get-source-by-ssrc", sink->rtp_ssrc,
&source);
if (source) {
g_object_get (source, "stats", &sstats, NULL);
gst_structure_get_uint64 (sstats, "packets-sent", &pkt_sent);
gst_structure_free (sstats);
g_clear_object (&source);
}
g_signal_emit_by_name (session, "get-source-by-ssrc", bond->rtcp_ssrc,
&source);
if (source) {
g_object_get (source, "stats", &sstats, NULL);
gst_structure_get_uint (sstats, "rb-round-trip", &rb_rtt);
gst_structure_free (sstats);
g_clear_object (&source);
}
g_object_unref (session);
g_object_get (bond->rtx_send, "num-rtx-packets", &rtx_sent, NULL);
/* rb_rtt is in Q16 in NTP time */
rtt = gst_util_uint64_scale (rb_rtt, GST_SECOND, 65536);
gst_structure_set (stats, "session-id", G_TYPE_INT, i,
"sent-original-packets", G_TYPE_UINT64, pkt_sent,
"sent-retransmitted-packets", G_TYPE_UINT64, rtx_sent,
"round-trip-time", G_TYPE_UINT64, rtt, NULL);
g_value_init (&value, GST_TYPE_STRUCTURE);
g_value_take_boxed (&value, stats);
g_value_array_append (session_stats, &value);
g_value_unset (&value);
total_pkt_sent += pkt_sent;
total_rtx_sent += rtx_sent;
}
gst_structure_set (ret,
"sent-original-packets", G_TYPE_UINT64, total_pkt_sent,
"sent-retransmitted-packets", G_TYPE_UINT64, total_rtx_sent,
"session-stats", G_TYPE_VALUE_ARRAY, session_stats, NULL);
g_value_array_free (session_stats);
return ret;
}
static gboolean
gst_rist_sink_dump_stats (GstClock * clock, GstClockTime time, GstClockID id,
gpointer user_data)
{
GstRistSink *sink = GST_RIST_SINK (user_data);
GstStructure *stats = gst_rist_sink_create_stats (sink);
gst_println ("%s: %" GST_PTR_FORMAT, GST_OBJECT_NAME (sink), stats);
gst_structure_free (stats);
return TRUE;
}
static void
gst_rist_sink_enable_stats_interval (GstRistSink * sink)
{
GstClock *clock;
GstClockTime start, interval;
if (sink->stats_interval == 0)
return;
interval = sink->stats_interval * GST_MSECOND;
clock = gst_system_clock_obtain ();
start = gst_clock_get_time (clock) + interval;
sink->stats_cid = gst_clock_new_periodic_id (clock, start, interval);
gst_clock_id_wait_async (sink->stats_cid, gst_rist_sink_dump_stats,
gst_object_ref (sink), (GDestroyNotify) gst_object_unref);
gst_object_unref (clock);
}
static void
gst_rist_sink_disable_stats_interval (GstRistSink * sink)
{
if (sink->stats_cid) {
gst_clock_id_unschedule (sink->stats_cid);
gst_clock_id_unref (sink->stats_cid);
sink->stats_cid = NULL;
}
}
static GstStateChangeReturn
gst_rist_sink_change_state (GstElement * element, GstStateChange transition)
{
GstRistSink *sink = GST_RIST_SINK (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_rist_sink_disable_stats_interval (sink);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (gst_rist_sink_parent_class)->change_state (element,
transition);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
ret = gst_rist_sink_start (sink);
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_rist_sink_enable_stats_interval (sink);
break;
default:
break;
}
return ret;
}
/* called with bonds lock */
static void
gst_rist_sink_update_bond_address (GstRistSink * sink, RistSenderBond * bond,
const gchar * address, guint port, const gchar * multicast_iface)
{
g_free (bond->address);
g_free (bond->multicast_iface);
bond->address = g_strdup (address);
bond->multicast_iface = multicast_iface ? g_strdup (multicast_iface) : NULL;
bond->port = port;
g_object_set (G_OBJECT (bond->rtp_sink), "host", address, "port", port,
"multicast-iface", bond->multicast_iface, NULL);
g_object_set (G_OBJECT (bond->rtcp_sink), "host", address,
"port", port + 1, "multicast-iface", bond->multicast_iface, NULL);
/* TODO add runtime support
* - add blocking the pad probe
* - update RTCP socket
* - cycle elements through NULL state
*/
}
/* called with bonds lock */
static gchar *
gst_rist_sink_get_bonds (GstRistSink * sink)
{
GString *bonds = g_string_new ("");
gint i;
for (i = 0; i < sink->bonds->len; i++) {
RistSenderBond *bond = g_ptr_array_index (sink->bonds, i);
if (bonds->len > 0)
g_string_append_c (bonds, ':');
g_string_append_printf (bonds, "%s:%u", bond->address, bond->port);
if (bond->multicast_iface)
g_string_append_printf (bonds, "/%s", bond->multicast_iface);
}
return g_string_free (bonds, FALSE);
}
struct RistAddress
{
gchar *address;
char *multicast_iface;
guint port;
};
/* called with bonds lock */
static void
gst_rist_sink_set_bonds (GstRistSink * sink, const gchar * bonds)
{
GStrv tokens = NULL;
struct RistAddress *addrs;
gint i;
if (bonds == NULL)
goto missing_address;
tokens = g_strsplit (bonds, ",", 0);
if (tokens[0] == NULL)
goto missing_address;
addrs = g_new0 (struct RistAddress, g_strv_length (tokens));
/* parse the address list */
for (i = 0; tokens[i]; i++) {
gchar *address = tokens[i];
char *port_ptr, *iface_ptr, *endptr;
guint port;
port_ptr = g_utf8_strrchr (address, -1, ':');
iface_ptr = g_utf8_strrchr (address, -1, '/');
if (!port_ptr)
goto bad_parameter;
if (!g_ascii_isdigit (port_ptr[1]))
goto bad_parameter;
if (iface_ptr) {
if (iface_ptr < port_ptr)
goto bad_parameter;
iface_ptr[0] = '\0';
}
port = strtol (port_ptr + 1, &endptr, 0);
if (endptr[0] != '\0')
goto bad_parameter;
/* port must be a multiple of 2 between 2 and 65534 */
if (port < 2 || (port & 1) || port > G_MAXUINT16)
goto invalid_port;
port_ptr[0] = '\0';
addrs[i].port = port;
addrs[i].address = g_strstrip (address);
if (iface_ptr)
addrs[i].multicast_iface = g_strstrip (iface_ptr + 1);
}
/* configure the bonds */
for (i = 0; tokens[i]; i++) {
RistSenderBond *bond = NULL;
if (i < sink->bonds->len)
bond = g_ptr_array_index (sink->bonds, i);
else
bond = gst_rist_sink_add_bond (sink);
gst_rist_sink_update_bond_address (sink, bond, addrs[i].address,
addrs[i].port, addrs[i].multicast_iface);
}
g_strfreev (tokens);
return;
missing_address:
g_warning ("'bonding-addresses' cannot be empty");
g_strfreev (tokens);
return;
bad_parameter:
g_warning ("Failed to parse address '%s", tokens[i]);
g_strfreev (tokens);
g_free (addrs);
return;
invalid_port:
g_warning ("RIST port must valid UDP port and a multiple of 2.");
g_strfreev (tokens);
g_free (addrs);
return;
}
static void
gst_rist_sink_set_multicast_loopback (GstRistSink * sink, gboolean loop)
{
gint i;
sink->multicast_loopback = loop;
for (i = 0; i < sink->bonds->len; i++) {
RistSenderBond *bond = g_ptr_array_index (sink->bonds, i);
g_object_set (G_OBJECT (bond->rtp_sink), "loop", loop, NULL);
g_object_set (G_OBJECT (bond->rtcp_sink), "loop", loop, NULL);
}
}
/* called with bonds lock */
static void
gst_rist_sink_set_multicast_ttl (GstRistSink * sink, gint ttl)
{
gint i;
sink->multicast_ttl = ttl;
for (i = 0; i < sink->bonds->len; i++) {
RistSenderBond *bond = g_ptr_array_index (sink->bonds, i);
g_object_set (G_OBJECT (bond->rtp_sink), "ttl-mc", ttl, NULL);
g_object_set (G_OBJECT (bond->rtcp_sink), "ttl-mc", ttl, NULL);
}
}
static void
gst_rist_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstRistSink *sink = GST_RIST_SINK (object);
GstStructure *sdes;
RistSenderBond *bond;
if (sink->construct_failed)
return;
g_mutex_lock (&sink->bonds_lock);
bond = g_ptr_array_index (sink->bonds, 0);
switch (prop_id) {
case PROP_ADDRESS:
g_value_set_string (value, bond->address);
break;
case PROP_PORT:
g_value_set_uint (value, bond->port);
break;
case PROP_SENDER_BUFFER:
g_object_get_property (G_OBJECT (bond->rtx_send), "max-size-time", value);
break;
case PROP_MIN_RTCP_INTERVAL:
g_value_set_uint (value, (guint) (sink->min_rtcp_interval / GST_MSECOND));
break;
case PROP_MAX_RTCP_BANDWIDTH:
g_value_set_double (value, sink->max_rtcp_bandwidth);
break;
case PROP_STATS_UPDATE_INTERVAL:
g_value_set_uint (value, sink->stats_interval);
break;
case PROP_STATS:
g_value_take_boxed (value, gst_rist_sink_create_stats (sink));
break;
case PROP_CNAME:
g_object_get (sink->rtpbin, "sdes", &sdes, NULL);
g_value_set_string (value, gst_structure_get_string (sdes, "cname"));
gst_structure_free (sdes);
break;
case PROP_MULTICAST_LOOPBACK:
g_value_set_boolean (value, sink->multicast_loopback);
break;
case PROP_MULTICAST_IFACE:
g_value_set_string (value, bond->multicast_iface);
break;
case PROP_MULTICAST_TTL:
g_value_set_int (value, sink->multicast_ttl);
break;
case PROP_BONDING_ADDRESSES:
g_value_take_string (value, gst_rist_sink_get_bonds (sink));
break;
case PROP_BONDING_METHOD:
g_value_set_enum (value, sink->bonding_method);
break;
case PROP_DISPATCHER:
g_value_set_object (value, sink->dispatcher);
break;
case PROP_DROP_NULL_TS_PACKETS:
g_object_get_property (G_OBJECT (sink->rtpext), "drop-null-ts-packets",
value);
break;
case PROP_SEQUENCE_NUMBER_EXTENSION:
g_object_get_property (G_OBJECT (sink->rtpext),
"sequence-number-extension", value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
g_mutex_unlock (&sink->bonds_lock);
}
static void
gst_rist_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstRistSink *sink = GST_RIST_SINK (object);
GstStructure *sdes;
RistSenderBond *bond;
if (sink->construct_failed)
return;
g_mutex_lock (&sink->bonds_lock);
bond = g_ptr_array_index (sink->bonds, 0);
switch (prop_id) {
case PROP_ADDRESS:
g_free (bond->address);
bond->address = g_value_dup_string (value);
g_object_set_property (G_OBJECT (bond->rtp_sink), "host", value);
g_object_set_property (G_OBJECT (bond->rtcp_sink), "host", value);
break;
case PROP_PORT:{
guint port = g_value_get_uint (value);
/* According to 5.1.1, RTCP receiver port most be event number and RTCP
* port should be the RTP port + 1 */
if (port & 0x1) {
g_warning ("Invalid RIST port %u, should be an even number.", port);
return;
}
bond->port = port;
g_object_set (bond->rtp_sink, "port", port, NULL);
g_object_set (bond->rtcp_sink, "port", port + 1, NULL);
break;
}
case PROP_SENDER_BUFFER:
g_object_set (bond->rtx_send,
"max-size-time", g_value_get_uint (value), NULL);
break;
case PROP_MIN_RTCP_INTERVAL:
sink->min_rtcp_interval = g_value_get_uint (value) * GST_MSECOND;
break;
case PROP_MAX_RTCP_BANDWIDTH:
sink->max_rtcp_bandwidth = g_value_get_double (value);
break;
case PROP_STATS_UPDATE_INTERVAL:
sink->stats_interval = g_value_get_uint (value);
break;
case PROP_CNAME:
g_object_get (sink->rtpbin, "sdes", &sdes, NULL);
gst_structure_set_value (sdes, "cname", value);
g_object_set (sink->rtpbin, "sdes", sdes, NULL);
gst_structure_free (sdes);
break;
case PROP_MULTICAST_LOOPBACK:
gst_rist_sink_set_multicast_loopback (sink, g_value_get_boolean (value));
break;
case PROP_MULTICAST_IFACE:
g_free (bond->multicast_iface);
bond->multicast_iface = g_value_dup_string (value);
g_object_set_property (G_OBJECT (bond->rtp_sink),
"multicast-iface", value);
g_object_set_property (G_OBJECT (bond->rtcp_sink),
"multicast-iface", value);
break;
case PROP_MULTICAST_TTL:
gst_rist_sink_set_multicast_ttl (sink, g_value_get_int (value));
break;
case PROP_BONDING_ADDRESSES:
gst_rist_sink_set_bonds (sink, g_value_get_string (value));
break;
case PROP_BONDING_METHOD:
sink->bonding_method = g_value_get_enum (value);
break;
case PROP_DISPATCHER:
if (sink->dispatcher)
g_object_unref (sink->dispatcher);
sink->dispatcher = g_object_ref_sink (g_value_get_object (value));
break;
case PROP_DROP_NULL_TS_PACKETS:
g_object_set_property (G_OBJECT (sink->rtpext), "drop-null-ts-packets",
value);
break;
case PROP_SEQUENCE_NUMBER_EXTENSION:
g_object_set_property (G_OBJECT (sink->rtpext),
"sequence-number-extension", value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
g_mutex_unlock (&sink->bonds_lock);
}
static void
gst_rist_sink_finalize (GObject * object)
{
GstRistSink *sink = GST_RIST_SINK (object);
gint i;
g_mutex_lock (&sink->bonds_lock);
for (i = 0; i < sink->bonds->len; i++) {
RistSenderBond *bond = g_ptr_array_index (sink->bonds, i);
g_free (bond->address);
g_free (bond->multicast_iface);
g_slice_free (RistSenderBond, bond);
}
g_ptr_array_free (sink->bonds, TRUE);
g_clear_object (&sink->rtxbin);
g_mutex_unlock (&sink->bonds_lock);
g_mutex_clear (&sink->bonds_lock);
G_OBJECT_CLASS (gst_rist_sink_parent_class)->finalize (object);
}
static void
gst_rist_sink_class_init (GstRistSinkClass * klass)
{
GstElementClass *element_class = (GstElementClass *) klass;
GObjectClass *object_class = (GObjectClass *) klass;
session_id_quark = g_quark_from_static_string ("gst-rist-sink-session-id");
gst_element_class_set_metadata (element_class,
"RIST Sink", "Source/Network",
"Sink that implements RIST TR-06-1 streaming specification",
"Nicolas Dufresne <nicolas.dufresne@collabora.com");
gst_element_class_add_static_pad_template (element_class, &sink_templ);
element_class->change_state = gst_rist_sink_change_state;
object_class->get_property = gst_rist_sink_get_property;
object_class->set_property = gst_rist_sink_set_property;
object_class->finalize = gst_rist_sink_finalize;
g_object_class_install_property (object_class, PROP_ADDRESS,
g_param_spec_string ("address", "Address",
"Address to send packets to (can be IPv4 or IPv6).", "0.0.0.0",
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_PORT,
g_param_spec_uint ("port", "Port", "The port RTP packets will be sent, "
"the RTCP port is this value + 1. This port must be an even number.",
2, 65534, 5004,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_SENDER_BUFFER,
g_param_spec_uint ("sender-buffer", "Sender Buffer",
"Size of the retransmission queue (in ms)", 0, G_MAXUINT, 1200,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_MIN_RTCP_INTERVAL,
g_param_spec_uint ("min-rtcp-interval", "Minimum RTCP Intercal",
"The minimum interval (in ms) between two regular successive RTCP "
"packets.", 0, 100, 100,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_MAX_RTCP_BANDWIDTH,
g_param_spec_double ("max-rtcp-bandwidth", "Maximum RTCP Bandwidth",
"The maximum bandwidth used for RTCP as a fraction of RTP bandwdith",
0.0, 0.05, 0.05,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_STATS_UPDATE_INTERVAL,
g_param_spec_uint ("stats-update-interval", "Statistics Update Interval",
"The interval between 'stats' update notification (in ms) (0 disabled)",
0, G_MAXUINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_STATS,
g_param_spec_boxed ("stats", "Statistics",
"Statistic in a GstStructure named 'rist/x-sender-stats'",
GST_TYPE_STRUCTURE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_CNAME,
g_param_spec_string ("cname", "CName",
"Set the CNAME in the SDES block of the sender report.", NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
GST_PARAM_DOC_SHOW_DEFAULT));
g_object_class_install_property (object_class, PROP_MULTICAST_LOOPBACK,
g_param_spec_boolean ("multicast-loopback", "Multicast Loopback",
"When enabled, the packet will be received locally.", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_MULTICAST_IFACE,
g_param_spec_string ("multicast-iface", "multicast-iface",
"The multicast interface to use to send packets.", NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_MULTICAST_TTL,
g_param_spec_int ("multicast-ttl", "Multicast TTL",
"The multicast time-to-live parameter.", 0, 255, 1,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_BONDING_ADDRESSES,
g_param_spec_string ("bonding-addresses", "Bonding Addresses",
"Comma (,) separated list of <address>:<port> to send to. ", NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_BONDING_METHOD,
g_param_spec_enum ("bonding-method", "Bonding Method",
"Defines the bonding method to use.",
gst_rist_bonding_method_get_type (),
GST_RIST_BONDING_METHOD_BROADCAST,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_DISPATCHER,
g_param_spec_object ("dispatcher", "Bonding Dispatcher",
"An element that takes care of multi-plexing bonded links. When set "
"\"bonding-method\" is ignored.",
GST_TYPE_ELEMENT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
GST_PARAM_MUTABLE_READY));
g_object_class_install_property (object_class, PROP_DROP_NULL_TS_PACKETS,
g_param_spec_boolean ("drop-null-ts-packets", "Drop null TS packets",
"Drop null MPEG-TS packet and replace them with a custom header"
" extension.", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_SEQUENCE_NUMBER_EXTENSION,
g_param_spec_boolean ("sequence-number-extension",
"Sequence Number Extension",
"Add sequence number extension to packets.", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT));
gst_type_mark_as_plugin_api (gst_rist_bonding_method_get_type (), 0);
}
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