mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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7c9a5e86fe
This is useful to track metadata about each group of packets Also include a unit test Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/666>
678 lines
19 KiB
C
678 lines
19 KiB
C
/* RTP funnel element for GStreamer
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*
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* gstrtpfunnel.c:
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*
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* Copyright (C) <2017> Pexip.
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* Contact: Havard Graff <havard@pexip.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-rtpfunnel
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* @title: rtpfunnel
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* @see_also: rtpbasepaylaoder, rtpsession
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*
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* RTP funnel is basically like a normal funnel with a few added
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* functionalities to support bundling.
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*
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* Bundle is the concept of sending multiple streams in a single RTP session.
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* These can be both audio and video streams, and several of both.
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* One of the advantages with bundling is that you can get away with fewer
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* ports for sending and receiving media. Also the RTCP traffic gets more
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* compact if you can report on multiple streams in a single sender/receiver
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* report.
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*
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* One of the reasons for a specialized RTP funnel is that some messages
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* coming upstream want to find their way back to the right stream,
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* and a normal funnel can't know which of its sinkpads it should send
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* these messages to. The RTP funnel achieves this by keeping track of the
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* SSRC of each stream on its sinkpad, and then uses the fact that upstream
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* events are tagged inside rtpbin with the appropriate SSRC, so that upon
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* receiving such an event, the RTP funnel can do a simple lookup for the
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* right pad to forward the event to.
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*
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* A good example here is the KeyUnit event. If several video encoders are
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* being bundled together using the RTP funnel, and one of the decoders on
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* the receiving side asks for a KeyUnit, typically a RTCP PLI message will
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* be sent from the receiver to the sender, and this will be transformed into
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* a GstForceKeyUnit event inside GstRTPSession, and sent upstream. The
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* RTP funnel can than make sure that this event hits the right encoder based
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* on the SSRC embedded in the event.
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*
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* Another feature of the RTP funnel is that it will mux together TWCC
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* (Transport-Wide Congestion Control) sequence-numbers. The point being that
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* it should increment "transport-wide", meaning potentially several
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* bundled streams. Note that not *all* streams being bundled needs to be
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* affected by this. As an example Google WebRTC will use bundle with audio
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* and video, but will only use TWCC sequence-numbers for the video-stream(s).
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/rtp/gstrtpbuffer.h>
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#include "gstrtpfunnel.h"
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GST_DEBUG_CATEGORY_STATIC (gst_rtp_funnel_debug);
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#define GST_CAT_DEFAULT gst_rtp_funnel_debug
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#define TWCC_EXTMAP_STR "http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01"
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/**************** GstRTPFunnelPad ****************/
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struct _GstRtpFunnelPadClass
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{
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GstPadClass class;
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};
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struct _GstRtpFunnelPad
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{
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GstPad pad;
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guint32 ssrc;
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gboolean has_twcc;
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};
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G_DEFINE_TYPE (GstRtpFunnelPad, gst_rtp_funnel_pad, GST_TYPE_PAD);
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static void
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gst_rtp_funnel_pad_class_init (G_GNUC_UNUSED GstRtpFunnelPadClass * klass)
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{
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}
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static void
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gst_rtp_funnel_pad_init (G_GNUC_UNUSED GstRtpFunnelPad * pad)
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{
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}
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/**************** GstRTPFunnel ****************/
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enum
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{
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PROP_0,
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PROP_COMMON_TS_OFFSET,
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};
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#define DEFAULT_COMMON_TS_OFFSET -1
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struct _GstRtpFunnelClass
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{
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GstElementClass class;
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};
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struct _GstRtpFunnel
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{
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GstElement element;
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GstPad *srcpad;
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GstCaps *srccaps; /* protected by OBJECT_LOCK */
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gboolean send_sticky_events;
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GHashTable *ssrc_to_pad; /* protected by OBJECT_LOCK */
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/* The last pad data was chained on */
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GstPad *current_pad;
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guint8 twcc_ext_id; /* the negotiated twcc extmap id */
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guint16 twcc_seqnum; /* our internal twcc seqnum */
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guint twcc_pads; /* numer of sinkpads with negotiated twcc */
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/* properties */
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gint common_ts_offset;
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};
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#define RTP_CAPS "application/x-rtp"
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static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink_%u",
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GST_PAD_SINK,
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GST_PAD_REQUEST,
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GST_STATIC_CAPS (RTP_CAPS));
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static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (RTP_CAPS));
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#define gst_rtp_funnel_parent_class parent_class
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G_DEFINE_TYPE (GstRtpFunnel, gst_rtp_funnel, GST_TYPE_ELEMENT);
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static void
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gst_rtp_funnel_send_sticky (GstRtpFunnel * funnel, GstPad * pad)
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{
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GstEvent *stream_start;
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GstCaps *caps;
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GstEvent *caps_ev;
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if (!funnel->send_sticky_events)
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goto done;
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stream_start = gst_pad_get_sticky_event (pad, GST_EVENT_STREAM_START, 0);
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if (stream_start && !gst_pad_push_event (funnel->srcpad, stream_start)) {
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GST_ERROR_OBJECT (funnel, "Could not push stream start");
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goto done;
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}
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/* We modify these caps in our sink pad event handlers, so make sure to
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* send a copy downstream so that we can keep our internal caps writable */
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GST_OBJECT_LOCK (funnel);
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caps = gst_caps_copy (funnel->srccaps);
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GST_OBJECT_UNLOCK (funnel);
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caps_ev = gst_event_new_caps (caps);
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gst_caps_unref (caps);
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if (caps_ev && !gst_pad_push_event (funnel->srcpad, caps_ev)) {
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GST_ERROR_OBJECT (funnel, "Could not push caps");
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goto done;
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}
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funnel->send_sticky_events = FALSE;
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done:
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return;
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}
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static void
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gst_rtp_funnel_forward_segment (GstRtpFunnel * funnel, GstPad * pad)
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{
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GstEvent *event;
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guint i;
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if (pad == funnel->current_pad) {
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goto done;
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}
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event = gst_pad_get_sticky_event (pad, GST_EVENT_SEGMENT, 0);
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if (event && !gst_pad_push_event (funnel->srcpad, event)) {
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GST_ERROR_OBJECT (funnel, "Could not push segment");
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goto done;
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}
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for (i = 0;; i++) {
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event = gst_pad_get_sticky_event (pad, GST_EVENT_CUSTOM_DOWNSTREAM_STICKY,
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i);
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if (event == NULL)
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break;
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if (!gst_pad_push_event (funnel->srcpad, event))
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GST_ERROR_OBJECT (funnel, "Could not push custom event");
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}
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funnel->current_pad = pad;
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done:
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return;
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}
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static void
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gst_rtp_funnel_set_twcc_seqnum (GstRtpFunnel * funnel,
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GstPad * pad, GstBuffer ** buf)
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{
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GstRtpFunnelPad *fpad = GST_RTP_FUNNEL_PAD_CAST (pad);
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GstRTPBuffer rtp = GST_RTP_BUFFER_INIT;
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if (!funnel->twcc_ext_id || !fpad->has_twcc)
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return;
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*buf = gst_buffer_make_writable (*buf);
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if (gst_rtp_buffer_map (*buf, GST_MAP_READWRITE, &rtp)) {
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gpointer data;
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/* if there already is a twcc-seqnum inside the packet */
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if (gst_rtp_buffer_get_extension_onebyte_header (&rtp, funnel->twcc_ext_id,
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0, &data, NULL)) {
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/* with only one pad, we read the twcc-seqnum instead of writing it */
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if (funnel->twcc_pads == 1) {
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funnel->twcc_seqnum = GST_READ_UINT16_BE (data);
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} else {
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GST_WRITE_UINT16_BE (data, funnel->twcc_seqnum);
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}
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} else {
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guint16 seq_be;
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GST_WRITE_UINT16_BE (&seq_be, funnel->twcc_seqnum);
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gst_rtp_buffer_add_extension_onebyte_header (&rtp, funnel->twcc_ext_id,
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&seq_be, 2);
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}
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}
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gst_rtp_buffer_unmap (&rtp);
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funnel->twcc_seqnum++;
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}
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static GstFlowReturn
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gst_rtp_funnel_sink_chain_object (GstPad * pad, GstRtpFunnel * funnel,
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gboolean is_list, GstMiniObject * obj)
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{
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GstFlowReturn res;
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GST_DEBUG_OBJECT (pad, "received %" GST_PTR_FORMAT, obj);
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GST_PAD_STREAM_LOCK (funnel->srcpad);
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gst_rtp_funnel_send_sticky (funnel, pad);
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gst_rtp_funnel_forward_segment (funnel, pad);
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if (is_list) {
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res = gst_pad_push_list (funnel->srcpad, GST_BUFFER_LIST_CAST (obj));
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} else {
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GstBuffer *buf = GST_BUFFER_CAST (obj);
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gst_rtp_funnel_set_twcc_seqnum (funnel, pad, &buf);
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res = gst_pad_push (funnel->srcpad, buf);
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}
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GST_PAD_STREAM_UNLOCK (funnel->srcpad);
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return res;
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}
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static GstFlowReturn
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gst_rtp_funnel_sink_chain_list (GstPad * pad, GstObject * parent,
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GstBufferList * list)
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{
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GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
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return gst_rtp_funnel_sink_chain_object (pad, funnel, TRUE,
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GST_MINI_OBJECT_CAST (list));
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}
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static GstFlowReturn
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gst_rtp_funnel_sink_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
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{
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GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
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return gst_rtp_funnel_sink_chain_object (pad, funnel, FALSE,
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GST_MINI_OBJECT_CAST (buffer));
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}
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static void
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gst_rtp_funnel_set_twcc_ext_id (GstRtpFunnel * funnel, guint8 twcc_ext_id)
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{
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gchar *name;
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if (funnel->twcc_ext_id == twcc_ext_id)
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return;
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name = g_strdup_printf ("extmap-%u", twcc_ext_id);
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GST_OBJECT_LOCK (funnel);
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gst_caps_set_simple (funnel->srccaps, name, G_TYPE_STRING, TWCC_EXTMAP_STR,
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NULL);
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GST_OBJECT_UNLOCK (funnel);
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g_free (name);
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/* make sure we update the sticky with the new caps */
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funnel->send_sticky_events = TRUE;
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GST_INFO_OBJECT (funnel, "Setting twcc-ext-id to %u", twcc_ext_id);
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funnel->twcc_ext_id = twcc_ext_id;
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}
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static guint8
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_get_extmap_id_for_attribute (const GstStructure * s, const gchar * ext_name)
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{
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guint i;
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guint8 extmap_id = 0;
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guint n_fields = gst_structure_n_fields (s);
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for (i = 0; i < n_fields; i++) {
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const gchar *field_name = gst_structure_nth_field_name (s, i);
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if (g_str_has_prefix (field_name, "extmap-")) {
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const gchar *str = gst_structure_get_string (s, field_name);
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if (str && g_strcmp0 (str, ext_name) == 0) {
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gint64 id = g_ascii_strtoll (field_name + 7, NULL, 10);
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if (id > 0 && id < 15) {
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extmap_id = id;
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break;
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}
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}
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}
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}
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return extmap_id;
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}
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static gboolean
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gst_rtp_funnel_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
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{
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GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
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GstRtpFunnelPad *fpad = GST_RTP_FUNNEL_PAD_CAST (pad);
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gboolean forward = TRUE;
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gboolean ret = TRUE;
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GST_DEBUG_OBJECT (pad, "received event %" GST_PTR_FORMAT, event);
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_STREAM_START:
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case GST_EVENT_SEGMENT:
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forward = FALSE;
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break;
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case GST_EVENT_CAPS:
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{
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GstCaps *caps;
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GstStructure *s;
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guint ssrc;
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guint8 ext_id;
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gst_event_parse_caps (event, &caps);
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GST_OBJECT_LOCK (funnel);
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if (!gst_caps_can_intersect (funnel->srccaps, caps)) {
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GST_ERROR_OBJECT (funnel, "Can't intersect with caps %" GST_PTR_FORMAT,
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caps);
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g_assert_not_reached ();
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}
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GST_OBJECT_UNLOCK (funnel);
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s = gst_caps_get_structure (caps, 0);
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if (gst_structure_get_uint (s, "ssrc", &ssrc)) {
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fpad->ssrc = ssrc;
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GST_DEBUG_OBJECT (pad, "Got ssrc: %u", ssrc);
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GST_OBJECT_LOCK (funnel);
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g_hash_table_insert (funnel->ssrc_to_pad, GUINT_TO_POINTER (ssrc), pad);
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GST_OBJECT_UNLOCK (funnel);
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}
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ext_id = _get_extmap_id_for_attribute (s, TWCC_EXTMAP_STR);
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if (ext_id > 0) {
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fpad->has_twcc = TRUE;
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funnel->twcc_pads++;
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gst_rtp_funnel_set_twcc_ext_id (funnel, ext_id);
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}
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forward = FALSE;
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break;
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}
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default:
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break;
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}
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if (forward) {
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ret = gst_pad_event_default (pad, parent, event);
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} else {
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gst_event_unref (event);
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}
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return ret;
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}
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static gboolean
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gst_rtp_funnel_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
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{
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GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
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gboolean res = TRUE;
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_CAPS:
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{
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GstCaps *filter_caps;
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GstCaps *new_caps;
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gst_query_parse_caps (query, &filter_caps);
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GST_OBJECT_LOCK (funnel);
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if (filter_caps) {
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new_caps = gst_caps_intersect_full (funnel->srccaps, filter_caps,
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GST_CAPS_INTERSECT_FIRST);
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} else {
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new_caps = gst_caps_copy (funnel->srccaps);
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}
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GST_OBJECT_UNLOCK (funnel);
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if (funnel->common_ts_offset >= 0)
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gst_caps_set_simple (new_caps, "timestamp-offset", G_TYPE_UINT,
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(guint) funnel->common_ts_offset, NULL);
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gst_query_set_caps_result (query, new_caps);
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GST_DEBUG_OBJECT (pad, "Answering caps-query with caps: %"
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GST_PTR_FORMAT, new_caps);
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gst_caps_unref (new_caps);
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break;
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}
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case GST_QUERY_ACCEPT_CAPS:
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{
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GstCaps *caps;
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gboolean result;
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gst_query_parse_accept_caps (query, &caps);
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GST_OBJECT_LOCK (funnel);
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result = gst_caps_is_subset (caps, funnel->srccaps);
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if (!result) {
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GST_ERROR_OBJECT (pad,
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"caps: %" GST_PTR_FORMAT " were not compatible with: %"
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GST_PTR_FORMAT, caps, funnel->srccaps);
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}
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GST_OBJECT_UNLOCK (funnel);
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gst_query_set_accept_caps_result (query, result);
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break;
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}
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default:
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res = gst_pad_query_default (pad, parent, query);
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break;
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}
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return res;
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}
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static gboolean
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gst_rtp_funnel_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
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{
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GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
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gboolean handled = FALSE;
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gboolean ret = TRUE;
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GST_DEBUG_OBJECT (pad, "received event %" GST_PTR_FORMAT, event);
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if (GST_EVENT_TYPE (event) == GST_EVENT_CUSTOM_UPSTREAM) {
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const GstStructure *s = gst_event_get_structure (event);
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GstPad *fpad;
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guint ssrc;
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if (s && gst_structure_get_uint (s, "ssrc", &ssrc)) {
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handled = TRUE;
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|
|
GST_OBJECT_LOCK (funnel);
|
|
fpad = g_hash_table_lookup (funnel->ssrc_to_pad, GUINT_TO_POINTER (ssrc));
|
|
if (fpad)
|
|
gst_object_ref (fpad);
|
|
GST_OBJECT_UNLOCK (funnel);
|
|
|
|
if (fpad) {
|
|
GST_INFO_OBJECT (pad, "Sending %" GST_PTR_FORMAT " to %" GST_PTR_FORMAT,
|
|
event, fpad);
|
|
ret = gst_pad_push_event (fpad, event);
|
|
gst_object_unref (fpad);
|
|
} else {
|
|
gst_event_unref (event);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!handled) {
|
|
gst_pad_event_default (pad, parent, event);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstPad *
|
|
gst_rtp_funnel_request_new_pad (GstElement * element, GstPadTemplate * templ,
|
|
const gchar * name, const GstCaps * caps)
|
|
{
|
|
GstPad *sinkpad;
|
|
(void) caps;
|
|
|
|
GST_DEBUG_OBJECT (element, "requesting pad");
|
|
|
|
sinkpad = GST_PAD_CAST (g_object_new (GST_TYPE_RTP_FUNNEL_PAD,
|
|
"name", name, "direction", templ->direction, "template", templ,
|
|
NULL));
|
|
|
|
gst_pad_set_chain_function (sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_rtp_funnel_sink_chain));
|
|
gst_pad_set_chain_list_function (sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_rtp_funnel_sink_chain_list));
|
|
gst_pad_set_event_function (sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_rtp_funnel_sink_event));
|
|
gst_pad_set_query_function (sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_rtp_funnel_sink_query));
|
|
|
|
GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
|
|
GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
|
|
|
|
gst_pad_set_active (sinkpad, TRUE);
|
|
|
|
gst_element_add_pad (element, sinkpad);
|
|
|
|
GST_DEBUG_OBJECT (element, "requested pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (sinkpad));
|
|
|
|
return sinkpad;
|
|
}
|
|
|
|
static void
|
|
gst_rtp_funnel_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_COMMON_TS_OFFSET:
|
|
funnel->common_ts_offset = g_value_get_int (value);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_rtp_funnel_get_property (GObject * object, guint prop_id, GValue * value,
|
|
GParamSpec * pspec)
|
|
{
|
|
GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_COMMON_TS_OFFSET:
|
|
g_value_set_int (value, funnel->common_ts_offset);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_rtp_funnel_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (element);
|
|
GstStateChangeReturn ret;
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
funnel->send_sticky_events = TRUE;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
_remove_pad_func (gpointer key, gpointer value, gpointer user_data)
|
|
{
|
|
(void) key;
|
|
if (GST_PAD_CAST (value) == GST_PAD_CAST (user_data))
|
|
return TRUE;
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
gst_rtp_funnel_release_pad (GstElement * element, GstPad * pad)
|
|
{
|
|
GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (element);
|
|
|
|
GST_DEBUG_OBJECT (funnel, "releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
|
|
|
|
g_hash_table_foreach_remove (funnel->ssrc_to_pad, _remove_pad_func, pad);
|
|
|
|
gst_pad_set_active (pad, FALSE);
|
|
gst_element_remove_pad (GST_ELEMENT_CAST (funnel), pad);
|
|
}
|
|
|
|
static void
|
|
gst_rtp_funnel_finalize (GObject * object)
|
|
{
|
|
GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (object);
|
|
|
|
gst_caps_unref (funnel->srccaps);
|
|
g_hash_table_destroy (funnel->ssrc_to_pad);
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static void
|
|
gst_rtp_funnel_class_init (GstRtpFunnelClass * klass)
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
|
|
|
|
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_rtp_funnel_finalize);
|
|
gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_rtp_funnel_get_property);
|
|
gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_rtp_funnel_set_property);
|
|
gstelement_class->request_new_pad =
|
|
GST_DEBUG_FUNCPTR (gst_rtp_funnel_request_new_pad);
|
|
gstelement_class->release_pad =
|
|
GST_DEBUG_FUNCPTR (gst_rtp_funnel_release_pad);
|
|
gstelement_class->change_state =
|
|
GST_DEBUG_FUNCPTR (gst_rtp_funnel_change_state);
|
|
|
|
gst_element_class_set_static_metadata (gstelement_class, "RTP funnel",
|
|
"RTP Funneling",
|
|
"Funnel RTP buffers together for multiplexing",
|
|
"Havard Graff <havard@gstip.com>");
|
|
|
|
gst_element_class_add_static_pad_template (gstelement_class, &sink_template);
|
|
gst_element_class_add_static_pad_template (gstelement_class, &src_template);
|
|
|
|
g_object_class_install_property (gobject_class, PROP_COMMON_TS_OFFSET,
|
|
g_param_spec_int ("common-ts-offset", "Common Timestamp Offset",
|
|
"Use the same RTP timestamp offset for all sinkpads (-1 = disable)",
|
|
-1, G_MAXINT32, DEFAULT_COMMON_TS_OFFSET,
|
|
G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
GST_DEBUG_CATEGORY_INIT (gst_rtp_funnel_debug,
|
|
"gstrtpfunnel", 0, "funnel element");
|
|
}
|
|
|
|
static void
|
|
gst_rtp_funnel_init (GstRtpFunnel * funnel)
|
|
{
|
|
funnel->srcpad = gst_pad_new_from_static_template (&src_template, "src");
|
|
gst_pad_use_fixed_caps (funnel->srcpad);
|
|
gst_pad_set_event_function (funnel->srcpad,
|
|
GST_DEBUG_FUNCPTR (gst_rtp_funnel_src_event));
|
|
gst_element_add_pad (GST_ELEMENT (funnel), funnel->srcpad);
|
|
|
|
funnel->send_sticky_events = TRUE;
|
|
funnel->srccaps = gst_caps_new_empty_simple (RTP_CAPS);
|
|
funnel->ssrc_to_pad = g_hash_table_new (NULL, NULL);
|
|
funnel->current_pad = NULL;
|
|
}
|