mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-04 23:46:43 +00:00
16d750bc01
Fix crash when processing RTCP APP packets.
1003 lines
26 KiB
C
1003 lines
26 KiB
C
/* GStreamer
|
|
* Copyright (C) <2007> Wim Taymans <wim.taymans@gmail.com>
|
|
*
|
|
* RTP SSRC demuxer
|
|
*
|
|
* 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-rtpssrcdemux
|
|
* @title: rtpssrcdemux
|
|
*
|
|
* rtpssrcdemux acts as a demuxer for RTP packets based on the SSRC of the
|
|
* packets. Its main purpose is to allow an application to easily receive and
|
|
* decode an RTP stream with multiple SSRCs.
|
|
*
|
|
* For each SSRC that is detected, a new pad will be created and the
|
|
* #GstRtpSsrcDemux::new-ssrc-pad signal will be emitted.
|
|
*
|
|
* ## Example pipelines
|
|
* |[
|
|
* gst-launch-1.0 udpsrc caps="application/x-rtp" ! rtpssrcdemux ! fakesink
|
|
* ]| Takes an RTP stream and send the RTP packets with the first detected SSRC
|
|
* to fakesink, discarding the other SSRCs.
|
|
*
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <string.h>
|
|
#include <gst/rtp/gstrtpbuffer.h>
|
|
#include <gst/rtp/gstrtcpbuffer.h>
|
|
|
|
#include "gstrtpssrcdemux.h"
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (gst_rtp_ssrc_demux_debug);
|
|
#define GST_CAT_DEFAULT gst_rtp_ssrc_demux_debug
|
|
|
|
/* generic templates */
|
|
static GstStaticPadTemplate rtp_ssrc_demux_sink_template =
|
|
GST_STATIC_PAD_TEMPLATE ("sink",
|
|
GST_PAD_SINK,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS ("application/x-rtp")
|
|
);
|
|
|
|
static GstStaticPadTemplate rtp_ssrc_demux_rtcp_sink_template =
|
|
GST_STATIC_PAD_TEMPLATE ("rtcp_sink",
|
|
GST_PAD_SINK,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS ("application/x-rtcp")
|
|
);
|
|
|
|
static GstStaticPadTemplate rtp_ssrc_demux_src_template =
|
|
GST_STATIC_PAD_TEMPLATE ("src_%u",
|
|
GST_PAD_SRC,
|
|
GST_PAD_SOMETIMES,
|
|
GST_STATIC_CAPS ("application/x-rtp")
|
|
);
|
|
|
|
static GstStaticPadTemplate rtp_ssrc_demux_rtcp_src_template =
|
|
GST_STATIC_PAD_TEMPLATE ("rtcp_src_%u",
|
|
GST_PAD_SRC,
|
|
GST_PAD_SOMETIMES,
|
|
GST_STATIC_CAPS ("application/x-rtcp")
|
|
);
|
|
|
|
#define INTERNAL_STREAM_LOCK(obj) (g_rec_mutex_lock (&(obj)->padlock))
|
|
#define INTERNAL_STREAM_UNLOCK(obj) (g_rec_mutex_unlock (&(obj)->padlock))
|
|
|
|
typedef enum
|
|
{
|
|
RTP_PAD,
|
|
RTCP_PAD
|
|
} PadType;
|
|
|
|
#define DEFAULT_MAX_STREAMS G_MAXUINT
|
|
enum
|
|
{
|
|
PROP_0,
|
|
PROP_MAX_STREAMS
|
|
};
|
|
|
|
/* signals */
|
|
enum
|
|
{
|
|
SIGNAL_NEW_SSRC_PAD,
|
|
SIGNAL_REMOVED_SSRC_PAD,
|
|
SIGNAL_CLEAR_SSRC,
|
|
LAST_SIGNAL
|
|
};
|
|
|
|
#define gst_rtp_ssrc_demux_parent_class parent_class
|
|
G_DEFINE_TYPE (GstRtpSsrcDemux, gst_rtp_ssrc_demux, GST_TYPE_ELEMENT);
|
|
|
|
/* GObject vmethods */
|
|
static void gst_rtp_ssrc_demux_dispose (GObject * object);
|
|
static void gst_rtp_ssrc_demux_finalize (GObject * object);
|
|
|
|
/* GstElement vmethods */
|
|
static GstStateChangeReturn gst_rtp_ssrc_demux_change_state (GstElement *
|
|
element, GstStateChange transition);
|
|
|
|
static void gst_rtp_ssrc_demux_clear_ssrc (GstRtpSsrcDemux * demux,
|
|
guint32 ssrc);
|
|
|
|
/* sinkpad stuff */
|
|
static GstFlowReturn gst_rtp_ssrc_demux_chain (GstPad * pad, GstObject * parent,
|
|
GstBuffer * buf);
|
|
static gboolean gst_rtp_ssrc_demux_sink_event (GstPad * pad, GstObject * parent,
|
|
GstEvent * event);
|
|
|
|
static GstFlowReturn gst_rtp_ssrc_demux_rtcp_chain (GstPad * pad,
|
|
GstObject * parent, GstBuffer * buf);
|
|
static GstIterator *gst_rtp_ssrc_demux_iterate_internal_links_sink (GstPad *
|
|
pad, GstObject * parent);
|
|
|
|
/* srcpad stuff */
|
|
static gboolean gst_rtp_ssrc_demux_src_event (GstPad * pad, GstObject * parent,
|
|
GstEvent * event);
|
|
static GstIterator *gst_rtp_ssrc_demux_iterate_internal_links_src (GstPad * pad,
|
|
GstObject * parent);
|
|
static gboolean gst_rtp_ssrc_demux_src_query (GstPad * pad, GstObject * parent,
|
|
GstQuery * query);
|
|
|
|
static guint gst_rtp_ssrc_demux_signals[LAST_SIGNAL] = { 0 };
|
|
|
|
/*
|
|
* Item for storing GstPad <-> SSRC pairs.
|
|
*/
|
|
struct _GstRtpSsrcDemuxPad
|
|
{
|
|
guint32 ssrc;
|
|
GstPad *rtp_pad;
|
|
GstCaps *caps;
|
|
GstPad *rtcp_pad;
|
|
};
|
|
|
|
/* find a src pad for a given SSRC, returns NULL if the SSRC was not found
|
|
* MUST be called with object lock
|
|
*/
|
|
static GstRtpSsrcDemuxPad *
|
|
find_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
|
|
{
|
|
GSList *walk;
|
|
|
|
for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
|
|
GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
|
|
|
|
if (pad->ssrc == ssrc)
|
|
return pad;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* returns a reference to the pad if found, %NULL otherwise */
|
|
static GstPad *
|
|
get_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc, PadType padtype)
|
|
{
|
|
GstRtpSsrcDemuxPad *demuxpad;
|
|
GstPad *retpad;
|
|
|
|
GST_OBJECT_LOCK (demux);
|
|
|
|
demuxpad = find_demux_pad_for_ssrc (demux, ssrc);
|
|
if (!demuxpad) {
|
|
GST_OBJECT_UNLOCK (demux);
|
|
return NULL;
|
|
}
|
|
|
|
switch (padtype) {
|
|
case RTP_PAD:
|
|
retpad = gst_object_ref (demuxpad->rtp_pad);
|
|
break;
|
|
case RTCP_PAD:
|
|
retpad = gst_object_ref (demuxpad->rtcp_pad);
|
|
break;
|
|
default:
|
|
retpad = NULL;
|
|
g_assert_not_reached ();
|
|
}
|
|
|
|
GST_OBJECT_UNLOCK (demux);
|
|
|
|
return retpad;
|
|
}
|
|
|
|
static GstEvent *
|
|
add_ssrc_and_ref (GstEvent * event, guint32 ssrc)
|
|
{
|
|
/* Set the ssrc on the output caps */
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_CAPS:
|
|
{
|
|
GstCaps *caps;
|
|
GstCaps *newcaps;
|
|
GstStructure *s;
|
|
|
|
gst_event_parse_caps (event, &caps);
|
|
newcaps = gst_caps_copy (caps);
|
|
|
|
s = gst_caps_get_structure (newcaps, 0);
|
|
gst_structure_set (s, "ssrc", G_TYPE_UINT, ssrc, NULL);
|
|
event = gst_event_new_caps (newcaps);
|
|
gst_caps_unref (newcaps);
|
|
break;
|
|
}
|
|
default:
|
|
gst_event_ref (event);
|
|
break;
|
|
}
|
|
|
|
return event;
|
|
}
|
|
|
|
struct ForwardStickyEventData
|
|
{
|
|
GstPad *pad;
|
|
guint32 ssrc;
|
|
};
|
|
|
|
/* With internal stream lock held */
|
|
static gboolean
|
|
forward_sticky_events (GstPad * pad, GstEvent ** event, gpointer user_data)
|
|
{
|
|
struct ForwardStickyEventData *data = user_data;
|
|
GstEvent *newevent;
|
|
|
|
newevent = add_ssrc_and_ref (*event, data->ssrc);
|
|
|
|
gst_pad_push_event (data->pad, newevent);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* With internal stream lock held */
|
|
static void
|
|
forward_initial_events (GstRtpSsrcDemux * demux, guint32 ssrc, GstPad * pad,
|
|
PadType padtype)
|
|
{
|
|
struct ForwardStickyEventData fdata;
|
|
GstPad *sinkpad = NULL;
|
|
|
|
if (padtype == RTP_PAD)
|
|
sinkpad = demux->rtp_sink;
|
|
else if (padtype == RTCP_PAD)
|
|
sinkpad = demux->rtcp_sink;
|
|
else
|
|
g_assert_not_reached ();
|
|
|
|
fdata.ssrc = ssrc;
|
|
fdata.pad = pad;
|
|
|
|
gst_pad_sticky_events_foreach (sinkpad, forward_sticky_events, &fdata);
|
|
}
|
|
|
|
/* MUST only be called from streaming thread */
|
|
static GstPad *
|
|
find_or_create_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc,
|
|
PadType padtype)
|
|
{
|
|
GstPad *rtp_pad, *rtcp_pad;
|
|
GstElementClass *klass;
|
|
GstPadTemplate *templ;
|
|
gchar *padname;
|
|
GstRtpSsrcDemuxPad *demuxpad;
|
|
GstPad *retpad;
|
|
guint num_streams;
|
|
|
|
INTERNAL_STREAM_LOCK (demux);
|
|
|
|
retpad = get_demux_pad_for_ssrc (demux, ssrc, padtype);
|
|
if (retpad != NULL) {
|
|
INTERNAL_STREAM_UNLOCK (demux);
|
|
return retpad;
|
|
}
|
|
/* We create 2 src pads per ssrc (RTP & RTCP). Checking if we are allowed
|
|
to create 2 more pads */
|
|
num_streams = (GST_ELEMENT_CAST (demux)->numsrcpads) >> 1;
|
|
if (num_streams >= demux->max_streams) {
|
|
INTERNAL_STREAM_UNLOCK (demux);
|
|
return NULL;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux, "creating new pad for SSRC %08x", ssrc);
|
|
|
|
klass = GST_ELEMENT_GET_CLASS (demux);
|
|
templ = gst_element_class_get_pad_template (klass, "src_%u");
|
|
padname = g_strdup_printf ("src_%u", ssrc);
|
|
rtp_pad = gst_pad_new_from_template (templ, padname);
|
|
g_free (padname);
|
|
|
|
templ = gst_element_class_get_pad_template (klass, "rtcp_src_%u");
|
|
padname = g_strdup_printf ("rtcp_src_%u", ssrc);
|
|
rtcp_pad = gst_pad_new_from_template (templ, padname);
|
|
g_free (padname);
|
|
|
|
/* wrap in structure and add to list */
|
|
demuxpad = g_new0 (GstRtpSsrcDemuxPad, 1);
|
|
demuxpad->ssrc = ssrc;
|
|
demuxpad->rtp_pad = rtp_pad;
|
|
demuxpad->rtcp_pad = rtcp_pad;
|
|
|
|
gst_pad_set_element_private (rtp_pad, demuxpad);
|
|
gst_pad_set_element_private (rtcp_pad, demuxpad);
|
|
|
|
GST_OBJECT_LOCK (demux);
|
|
demux->srcpads = g_slist_prepend (demux->srcpads, demuxpad);
|
|
GST_OBJECT_UNLOCK (demux);
|
|
|
|
gst_pad_set_query_function (rtp_pad, gst_rtp_ssrc_demux_src_query);
|
|
gst_pad_set_iterate_internal_links_function (rtp_pad,
|
|
gst_rtp_ssrc_demux_iterate_internal_links_src);
|
|
gst_pad_set_event_function (rtp_pad, gst_rtp_ssrc_demux_src_event);
|
|
gst_pad_use_fixed_caps (rtp_pad);
|
|
gst_pad_set_active (rtp_pad, TRUE);
|
|
|
|
gst_pad_set_event_function (rtcp_pad, gst_rtp_ssrc_demux_src_event);
|
|
gst_pad_set_iterate_internal_links_function (rtcp_pad,
|
|
gst_rtp_ssrc_demux_iterate_internal_links_src);
|
|
gst_pad_use_fixed_caps (rtcp_pad);
|
|
gst_pad_set_active (rtcp_pad, TRUE);
|
|
|
|
forward_initial_events (demux, ssrc, rtp_pad, RTP_PAD);
|
|
forward_initial_events (demux, ssrc, rtcp_pad, RTCP_PAD);
|
|
|
|
gst_element_add_pad (GST_ELEMENT_CAST (demux), rtp_pad);
|
|
gst_element_add_pad (GST_ELEMENT_CAST (demux), rtcp_pad);
|
|
|
|
switch (padtype) {
|
|
case RTP_PAD:
|
|
retpad = gst_object_ref (demuxpad->rtp_pad);
|
|
break;
|
|
case RTCP_PAD:
|
|
retpad = gst_object_ref (demuxpad->rtcp_pad);
|
|
break;
|
|
default:
|
|
retpad = NULL;
|
|
g_assert_not_reached ();
|
|
}
|
|
|
|
g_signal_emit (G_OBJECT (demux),
|
|
gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD], 0, ssrc, rtp_pad);
|
|
|
|
INTERNAL_STREAM_UNLOCK (demux);
|
|
|
|
return retpad;
|
|
}
|
|
|
|
static void
|
|
gst_rtp_ssrc_demux_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstRtpSsrcDemux *demux;
|
|
|
|
demux = GST_RTP_SSRC_DEMUX (object);
|
|
switch (prop_id) {
|
|
case PROP_MAX_STREAMS:
|
|
demux->max_streams = g_value_get_uint (value);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_rtp_ssrc_demux_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstRtpSsrcDemux *demux;
|
|
|
|
demux = GST_RTP_SSRC_DEMUX (object);
|
|
switch (prop_id) {
|
|
case PROP_MAX_STREAMS:
|
|
g_value_set_uint (value, demux->max_streams);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_rtp_ssrc_demux_class_init (GstRtpSsrcDemuxClass * klass)
|
|
{
|
|
GObjectClass *gobject_klass;
|
|
GstElementClass *gstelement_klass;
|
|
GstRtpSsrcDemuxClass *gstrtpssrcdemux_klass;
|
|
|
|
gobject_klass = (GObjectClass *) klass;
|
|
gstelement_klass = (GstElementClass *) klass;
|
|
gstrtpssrcdemux_klass = (GstRtpSsrcDemuxClass *) klass;
|
|
|
|
gobject_klass->dispose = gst_rtp_ssrc_demux_dispose;
|
|
gobject_klass->finalize = gst_rtp_ssrc_demux_finalize;
|
|
gobject_klass->set_property = gst_rtp_ssrc_demux_set_property;
|
|
gobject_klass->get_property = gst_rtp_ssrc_demux_get_property;
|
|
|
|
g_object_class_install_property (gobject_klass, PROP_MAX_STREAMS,
|
|
g_param_spec_uint ("max-streams", "Max Streams",
|
|
"The maximum number of streams allowed",
|
|
0, G_MAXUINT, DEFAULT_MAX_STREAMS,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
/**
|
|
* GstRtpSsrcDemux::new-ssrc-pad:
|
|
* @demux: the object which received the signal
|
|
* @ssrc: the SSRC of the pad
|
|
* @pad: the new pad.
|
|
*
|
|
* Emitted when a new SSRC pad has been created.
|
|
*/
|
|
gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD] =
|
|
g_signal_new ("new-ssrc-pad",
|
|
G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
|
|
G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, new_ssrc_pad),
|
|
NULL, NULL, NULL, G_TYPE_NONE, 2, G_TYPE_UINT, GST_TYPE_PAD);
|
|
|
|
/**
|
|
* GstRtpSsrcDemux::removed-ssrc-pad:
|
|
* @demux: the object which received the signal
|
|
* @ssrc: the SSRC of the pad
|
|
* @pad: the removed pad.
|
|
*
|
|
* Emitted when a SSRC pad has been removed.
|
|
*/
|
|
gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD] =
|
|
g_signal_new ("removed-ssrc-pad",
|
|
G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
|
|
G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, removed_ssrc_pad),
|
|
NULL, NULL, NULL, G_TYPE_NONE, 2, G_TYPE_UINT, GST_TYPE_PAD);
|
|
|
|
/**
|
|
* GstRtpSsrcDemux::clear-ssrc:
|
|
* @demux: the object which received the signal
|
|
* @ssrc: the SSRC of the pad
|
|
*
|
|
* Action signal to remove the pad for SSRC.
|
|
*/
|
|
gst_rtp_ssrc_demux_signals[SIGNAL_CLEAR_SSRC] =
|
|
g_signal_new ("clear-ssrc",
|
|
G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
|
|
G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, clear_ssrc),
|
|
NULL, NULL, NULL, G_TYPE_NONE, 1, G_TYPE_UINT);
|
|
|
|
gstelement_klass->change_state =
|
|
GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_change_state);
|
|
gstrtpssrcdemux_klass->clear_ssrc =
|
|
GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_clear_ssrc);
|
|
|
|
gst_element_class_add_static_pad_template (gstelement_klass,
|
|
&rtp_ssrc_demux_sink_template);
|
|
gst_element_class_add_static_pad_template (gstelement_klass,
|
|
&rtp_ssrc_demux_rtcp_sink_template);
|
|
gst_element_class_add_static_pad_template (gstelement_klass,
|
|
&rtp_ssrc_demux_src_template);
|
|
gst_element_class_add_static_pad_template (gstelement_klass,
|
|
&rtp_ssrc_demux_rtcp_src_template);
|
|
|
|
gst_element_class_set_static_metadata (gstelement_klass, "RTP SSRC Demux",
|
|
"Demux/Network/RTP",
|
|
"Splits RTP streams based on the SSRC",
|
|
"Wim Taymans <wim.taymans@gmail.com>");
|
|
|
|
GST_DEBUG_CATEGORY_INIT (gst_rtp_ssrc_demux_debug,
|
|
"rtpssrcdemux", 0, "RTP SSRC demuxer");
|
|
|
|
GST_DEBUG_REGISTER_FUNCPTR (gst_rtp_ssrc_demux_chain);
|
|
GST_DEBUG_REGISTER_FUNCPTR (gst_rtp_ssrc_demux_rtcp_chain);
|
|
}
|
|
|
|
static void
|
|
gst_rtp_ssrc_demux_init (GstRtpSsrcDemux * demux)
|
|
{
|
|
GstElementClass *klass = GST_ELEMENT_GET_CLASS (demux);
|
|
|
|
demux->rtp_sink =
|
|
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
|
|
"sink"), "sink");
|
|
gst_pad_set_chain_function (demux->rtp_sink, gst_rtp_ssrc_demux_chain);
|
|
gst_pad_set_event_function (demux->rtp_sink, gst_rtp_ssrc_demux_sink_event);
|
|
gst_pad_set_iterate_internal_links_function (demux->rtp_sink,
|
|
gst_rtp_ssrc_demux_iterate_internal_links_sink);
|
|
gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtp_sink);
|
|
|
|
demux->rtcp_sink =
|
|
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
|
|
"rtcp_sink"), "rtcp_sink");
|
|
gst_pad_set_chain_function (demux->rtcp_sink, gst_rtp_ssrc_demux_rtcp_chain);
|
|
gst_pad_set_event_function (demux->rtcp_sink, gst_rtp_ssrc_demux_sink_event);
|
|
gst_pad_set_iterate_internal_links_function (demux->rtcp_sink,
|
|
gst_rtp_ssrc_demux_iterate_internal_links_sink);
|
|
gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtcp_sink);
|
|
|
|
demux->max_streams = DEFAULT_MAX_STREAMS;
|
|
|
|
g_rec_mutex_init (&demux->padlock);
|
|
}
|
|
|
|
static void
|
|
gst_rtp_ssrc_demux_reset (GstRtpSsrcDemux * demux)
|
|
{
|
|
GSList *walk;
|
|
|
|
for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
|
|
GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
|
|
|
|
gst_pad_set_active (dpad->rtp_pad, FALSE);
|
|
gst_pad_set_active (dpad->rtcp_pad, FALSE);
|
|
|
|
gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
|
|
gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
|
|
g_free (dpad);
|
|
}
|
|
g_slist_free (demux->srcpads);
|
|
demux->srcpads = NULL;
|
|
}
|
|
|
|
static void
|
|
gst_rtp_ssrc_demux_dispose (GObject * object)
|
|
{
|
|
GstRtpSsrcDemux *demux;
|
|
|
|
demux = GST_RTP_SSRC_DEMUX (object);
|
|
|
|
gst_rtp_ssrc_demux_reset (demux);
|
|
|
|
G_OBJECT_CLASS (parent_class)->dispose (object);
|
|
}
|
|
|
|
static void
|
|
gst_rtp_ssrc_demux_finalize (GObject * object)
|
|
{
|
|
GstRtpSsrcDemux *demux;
|
|
|
|
demux = GST_RTP_SSRC_DEMUX (object);
|
|
g_rec_mutex_clear (&demux->padlock);
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static void
|
|
gst_rtp_ssrc_demux_clear_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
|
|
{
|
|
GstRtpSsrcDemuxPad *dpad;
|
|
|
|
GST_OBJECT_LOCK (demux);
|
|
dpad = find_demux_pad_for_ssrc (demux, ssrc);
|
|
if (dpad == NULL) {
|
|
GST_OBJECT_UNLOCK (demux);
|
|
goto unknown_pad;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux, "clearing pad for SSRC %08x", ssrc);
|
|
|
|
demux->srcpads = g_slist_remove (demux->srcpads, dpad);
|
|
GST_OBJECT_UNLOCK (demux);
|
|
|
|
gst_pad_set_active (dpad->rtp_pad, FALSE);
|
|
gst_pad_set_active (dpad->rtcp_pad, FALSE);
|
|
|
|
g_signal_emit (G_OBJECT (demux),
|
|
gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD], 0, ssrc,
|
|
dpad->rtp_pad);
|
|
|
|
gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
|
|
gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
|
|
|
|
g_free (dpad);
|
|
|
|
return;
|
|
|
|
/* ERRORS */
|
|
unknown_pad:
|
|
{
|
|
GST_WARNING_OBJECT (demux, "unknown SSRC %08x", ssrc);
|
|
return;
|
|
}
|
|
}
|
|
|
|
struct ForwardEventData
|
|
{
|
|
GstRtpSsrcDemux *demux;
|
|
GstEvent *event;
|
|
gboolean res;
|
|
GstPad *pad;
|
|
};
|
|
|
|
static gboolean
|
|
forward_event (GstPad * pad, gpointer user_data)
|
|
{
|
|
struct ForwardEventData *fdata = user_data;
|
|
GSList *walk = NULL;
|
|
GstEvent *newevent = NULL;
|
|
|
|
GST_OBJECT_LOCK (fdata->demux);
|
|
for (walk = fdata->demux->srcpads; walk; walk = walk->next) {
|
|
GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
|
|
|
|
if (pad == dpad->rtp_pad || pad == dpad->rtcp_pad) {
|
|
newevent = add_ssrc_and_ref (fdata->event, dpad->ssrc);
|
|
break;
|
|
}
|
|
}
|
|
GST_OBJECT_UNLOCK (fdata->demux);
|
|
|
|
if (newevent)
|
|
fdata->res &= gst_pad_push_event (pad, newevent);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
gst_rtp_ssrc_demux_sink_event (GstPad * pad, GstObject * parent,
|
|
GstEvent * event)
|
|
{
|
|
GstRtpSsrcDemux *demux;
|
|
struct ForwardEventData fdata;
|
|
|
|
demux = GST_RTP_SSRC_DEMUX (parent);
|
|
|
|
fdata.demux = demux;
|
|
fdata.pad = pad;
|
|
fdata.event = event;
|
|
fdata.res = TRUE;
|
|
|
|
gst_pad_forward (pad, forward_event, &fdata);
|
|
|
|
gst_event_unref (event);
|
|
|
|
return fdata.res;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_rtp_ssrc_demux_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
|
|
{
|
|
GstFlowReturn ret;
|
|
GstRtpSsrcDemux *demux;
|
|
guint32 ssrc;
|
|
GstRTPBuffer rtp = { NULL };
|
|
GstPad *srcpad;
|
|
|
|
demux = GST_RTP_SSRC_DEMUX (parent);
|
|
|
|
if (!gst_rtp_buffer_map (buf, GST_MAP_READ, &rtp))
|
|
goto invalid_payload;
|
|
|
|
ssrc = gst_rtp_buffer_get_ssrc (&rtp);
|
|
gst_rtp_buffer_unmap (&rtp);
|
|
|
|
GST_DEBUG_OBJECT (demux, "received buffer of SSRC %08x", ssrc);
|
|
|
|
srcpad = find_or_create_demux_pad_for_ssrc (demux, ssrc, RTP_PAD);
|
|
if (srcpad == NULL)
|
|
goto create_failed;
|
|
|
|
/* push to srcpad */
|
|
ret = gst_pad_push (srcpad, buf);
|
|
|
|
if (ret != GST_FLOW_OK) {
|
|
GstPad *active_pad;
|
|
|
|
/* check if the ssrc still there, may have been removed */
|
|
active_pad = get_demux_pad_for_ssrc (demux, ssrc, RTP_PAD);
|
|
|
|
if (active_pad == NULL || active_pad != srcpad) {
|
|
/* SSRC was removed during the push ... ignore the error */
|
|
ret = GST_FLOW_OK;
|
|
}
|
|
|
|
g_clear_object (&active_pad);
|
|
}
|
|
|
|
gst_object_unref (srcpad);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
invalid_payload:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "Dropping invalid RTP packet");
|
|
gst_buffer_unref (buf);
|
|
return GST_FLOW_OK;
|
|
}
|
|
create_failed:
|
|
{
|
|
gst_buffer_unref (buf);
|
|
GST_WARNING_OBJECT (demux,
|
|
"Dropping buffer SSRC %08x. "
|
|
"Max streams number reached (%u)", ssrc, demux->max_streams);
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_rtp_ssrc_demux_rtcp_chain (GstPad * pad, GstObject * parent,
|
|
GstBuffer * buf)
|
|
{
|
|
GstFlowReturn ret;
|
|
GstRtpSsrcDemux *demux;
|
|
guint32 ssrc;
|
|
GstRTCPPacket packet;
|
|
GstRTCPBuffer rtcp = { NULL, };
|
|
GstPad *srcpad;
|
|
|
|
demux = GST_RTP_SSRC_DEMUX (parent);
|
|
|
|
if (!gst_rtcp_buffer_validate_reduced (buf))
|
|
goto invalid_rtcp;
|
|
|
|
gst_rtcp_buffer_map (buf, GST_MAP_READ, &rtcp);
|
|
if (!gst_rtcp_buffer_get_first_packet (&rtcp, &packet)) {
|
|
gst_rtcp_buffer_unmap (&rtcp);
|
|
goto invalid_rtcp;
|
|
}
|
|
|
|
/* first packet must be SR or RR, or in case of a reduced size RTCP packet
|
|
* it must be APP, RTPFB or PSFB feeadback, or else the validate would
|
|
* have failed */
|
|
switch (gst_rtcp_packet_get_type (&packet)) {
|
|
case GST_RTCP_TYPE_SR:
|
|
/* get the ssrc so that we can route it to the right source pad */
|
|
gst_rtcp_packet_sr_get_sender_info (&packet, &ssrc, NULL, NULL, NULL,
|
|
NULL);
|
|
break;
|
|
case GST_RTCP_TYPE_RR:
|
|
ssrc = gst_rtcp_packet_rr_get_ssrc (&packet);
|
|
break;
|
|
case GST_RTCP_TYPE_APP:
|
|
ssrc = gst_rtcp_packet_app_get_ssrc (&packet);
|
|
break;
|
|
case GST_RTCP_TYPE_RTPFB:
|
|
case GST_RTCP_TYPE_PSFB:
|
|
ssrc = gst_rtcp_packet_fb_get_sender_ssrc (&packet);
|
|
break;
|
|
default:
|
|
goto unexpected_rtcp;
|
|
}
|
|
gst_rtcp_buffer_unmap (&rtcp);
|
|
|
|
GST_DEBUG_OBJECT (demux, "received RTCP of SSRC %08x", ssrc);
|
|
|
|
srcpad = find_or_create_demux_pad_for_ssrc (demux, ssrc, RTCP_PAD);
|
|
if (srcpad == NULL)
|
|
goto create_failed;
|
|
|
|
/* push to srcpad */
|
|
ret = gst_pad_push (srcpad, buf);
|
|
|
|
if (ret != GST_FLOW_OK) {
|
|
GstPad *active_pad;
|
|
|
|
/* check if the ssrc still there, may have been removed */
|
|
active_pad = get_demux_pad_for_ssrc (demux, ssrc, RTCP_PAD);
|
|
if (active_pad == NULL || active_pad != srcpad) {
|
|
/* SSRC was removed during the push ... ignore the error */
|
|
ret = GST_FLOW_OK;
|
|
}
|
|
|
|
g_clear_object (&active_pad);
|
|
}
|
|
|
|
gst_object_unref (srcpad);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
invalid_rtcp:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "Dropping invalid RTCP packet");
|
|
gst_buffer_unref (buf);
|
|
return GST_FLOW_OK;
|
|
}
|
|
unexpected_rtcp:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "dropping unexpected RTCP packet");
|
|
gst_buffer_unref (buf);
|
|
return GST_FLOW_OK;
|
|
}
|
|
create_failed:
|
|
{
|
|
gst_buffer_unref (buf);
|
|
GST_WARNING_OBJECT (demux,
|
|
"Dropping buffer SSRC %08x. "
|
|
"Max streams number reached (%u)", ssrc, demux->max_streams);
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
static GstRtpSsrcDemuxPad *
|
|
find_demux_pad_for_pad (GstRtpSsrcDemux * demux, GstPad * pad)
|
|
{
|
|
GSList *walk;
|
|
|
|
for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
|
|
GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
|
|
if (dpad->rtp_pad == pad || dpad->rtcp_pad == pad) {
|
|
return dpad;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
gst_rtp_ssrc_demux_src_event (GstPad * pad, GstObject * parent,
|
|
GstEvent * event)
|
|
{
|
|
GstRtpSsrcDemux *demux;
|
|
const GstStructure *s;
|
|
|
|
demux = GST_RTP_SSRC_DEMUX (parent);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_CUSTOM_UPSTREAM:
|
|
case GST_EVENT_CUSTOM_BOTH:
|
|
case GST_EVENT_CUSTOM_BOTH_OOB:
|
|
s = gst_event_get_structure (event);
|
|
if (s && !gst_structure_has_field (s, "ssrc")) {
|
|
GstRtpSsrcDemuxPad *dpad = find_demux_pad_for_pad (demux, pad);
|
|
|
|
if (dpad) {
|
|
GstStructure *ws;
|
|
|
|
event = gst_event_make_writable (event);
|
|
ws = gst_event_writable_structure (event);
|
|
gst_structure_set (ws, "ssrc", G_TYPE_UINT, dpad->ssrc, NULL);
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return gst_pad_event_default (pad, parent, event);
|
|
}
|
|
|
|
static GstIterator *
|
|
gst_rtp_ssrc_demux_iterate_internal_links_src (GstPad * pad, GstObject * parent)
|
|
{
|
|
GstRtpSsrcDemux *demux;
|
|
GstPad *otherpad = NULL;
|
|
GstIterator *it = NULL;
|
|
GSList *current;
|
|
|
|
demux = GST_RTP_SSRC_DEMUX (parent);
|
|
|
|
GST_OBJECT_LOCK (demux);
|
|
for (current = demux->srcpads; current; current = g_slist_next (current)) {
|
|
GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) current->data;
|
|
|
|
if (pad == dpad->rtp_pad) {
|
|
otherpad = demux->rtp_sink;
|
|
break;
|
|
} else if (pad == dpad->rtcp_pad) {
|
|
otherpad = demux->rtcp_sink;
|
|
break;
|
|
}
|
|
}
|
|
if (otherpad) {
|
|
GValue val = { 0, };
|
|
|
|
g_value_init (&val, GST_TYPE_PAD);
|
|
g_value_set_object (&val, otherpad);
|
|
it = gst_iterator_new_single (GST_TYPE_PAD, &val);
|
|
g_value_unset (&val);
|
|
|
|
}
|
|
GST_OBJECT_UNLOCK (demux);
|
|
|
|
return it;
|
|
}
|
|
|
|
/* Should return 0 for elements to be included */
|
|
static gint
|
|
src_pad_compare_func (gconstpointer a, gconstpointer b)
|
|
{
|
|
GstPad *pad = GST_PAD (g_value_get_object (a));
|
|
const gchar *prefix = g_value_get_string (b);
|
|
gint res;
|
|
|
|
/* 0 means equal means we accept the pad, accepted if there is a name
|
|
* and it starts with the prefix */
|
|
GST_OBJECT_LOCK (pad);
|
|
res = !GST_PAD_NAME (pad) || !g_str_has_prefix (GST_PAD_NAME (pad), prefix);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return res;
|
|
}
|
|
|
|
static GstIterator *
|
|
gst_rtp_ssrc_demux_iterate_internal_links_sink (GstPad * pad,
|
|
GstObject * parent)
|
|
{
|
|
GstRtpSsrcDemux *demux;
|
|
GstIterator *it = NULL;
|
|
GValue gval = { 0, };
|
|
|
|
demux = GST_RTP_SSRC_DEMUX (parent);
|
|
|
|
g_value_init (&gval, G_TYPE_STRING);
|
|
if (pad == demux->rtp_sink)
|
|
g_value_set_static_string (&gval, "src_");
|
|
else if (pad == demux->rtcp_sink)
|
|
g_value_set_static_string (&gval, "rtcp_src_");
|
|
else
|
|
g_assert_not_reached ();
|
|
|
|
it = gst_element_iterate_src_pads (GST_ELEMENT_CAST (demux));
|
|
it = gst_iterator_filter (it, src_pad_compare_func, &gval);
|
|
|
|
return it;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
gst_rtp_ssrc_demux_src_query (GstPad * pad, GstObject * parent,
|
|
GstQuery * query)
|
|
{
|
|
GstRtpSsrcDemux *demux;
|
|
gboolean res = FALSE;
|
|
|
|
demux = GST_RTP_SSRC_DEMUX (parent);
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_LATENCY:
|
|
{
|
|
|
|
if ((res = gst_pad_peer_query (demux->rtp_sink, query))) {
|
|
gboolean live;
|
|
GstClockTime min_latency, max_latency;
|
|
GstRtpSsrcDemuxPad *demuxpad;
|
|
|
|
demuxpad = gst_pad_get_element_private (pad);
|
|
|
|
gst_query_parse_latency (query, &live, &min_latency, &max_latency);
|
|
|
|
GST_DEBUG_OBJECT (demux, "peer min latency %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (min_latency));
|
|
|
|
GST_DEBUG_OBJECT (demux, "latency for SSRC %08x", demuxpad->ssrc);
|
|
|
|
gst_query_set_latency (query, live, min_latency, max_latency);
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
res = gst_pad_query_default (pad, parent, query);
|
|
break;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_rtp_ssrc_demux_change_state (GstElement * element,
|
|
GstStateChange transition)
|
|
{
|
|
GstStateChangeReturn ret;
|
|
GstRtpSsrcDemux *demux;
|
|
|
|
demux = GST_RTP_SSRC_DEMUX (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
gst_rtp_ssrc_demux_reset (demux);
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
default:
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|