1 /* RTP funnel element for GStreamer
5 * Copyright (C) <2017> Pexip.
6 * Contact: Havard Graff <havard@pexip.com>
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
27 #include "gstrtpfunnel.h"
29 GST_DEBUG_CATEGORY_STATIC (gst_rtp_funnel_debug);
30 #define GST_CAT_DEFAULT gst_rtp_funnel_debug
32 struct _GstRtpFunnelPadClass
37 struct _GstRtpFunnelPad
46 PROP_COMMON_TS_OFFSET,
49 #define DEFAULT_COMMON_TS_OFFSET -1
51 G_DEFINE_TYPE (GstRtpFunnelPad, gst_rtp_funnel_pad, GST_TYPE_PAD);
54 gst_rtp_funnel_pad_class_init (GstRtpFunnelPadClass * klass)
60 gst_rtp_funnel_pad_init (GstRtpFunnelPad * pad)
65 struct _GstRtpFunnelClass
67 GstElementClass class;
76 gboolean send_sticky_events;
77 GHashTable *ssrc_to_pad;
80 gint common_ts_offset;
83 #define RTP_CAPS "application/x-rtp"
85 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink_%u",
88 GST_STATIC_CAPS (RTP_CAPS));
90 static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
93 GST_STATIC_CAPS (RTP_CAPS));
95 #define gst_rtp_funnel_parent_class parent_class
96 G_DEFINE_TYPE (GstRtpFunnel, gst_rtp_funnel, GST_TYPE_ELEMENT);
100 gst_rtp_funnel_send_sticky (GstRtpFunnel * funnel, GstPad * pad)
102 GstEvent *stream_start;
106 if (!funnel->send_sticky_events)
109 stream_start = gst_pad_get_sticky_event (pad, GST_EVENT_STREAM_START, 0);
110 if (stream_start && !gst_pad_push_event (funnel->srcpad, stream_start)) {
111 GST_ERROR_OBJECT (funnel, "Could not push stream start");
115 caps = gst_event_new_caps (funnel->srccaps);
116 if (caps && !gst_pad_push_event (funnel->srcpad, caps)) {
117 GST_ERROR_OBJECT (funnel, "Could not push caps");
121 segment = gst_pad_get_sticky_event (pad, GST_EVENT_SEGMENT, 0);
122 if (segment && !gst_pad_push_event (funnel->srcpad, segment)) {
123 GST_ERROR_OBJECT (funnel, "Could not push segment");
127 funnel->send_sticky_events = FALSE;
130 return !funnel->send_sticky_events;
134 gst_rtp_funnel_sink_chain_object (GstPad * pad, GstRtpFunnel * funnel,
135 gboolean is_list, GstMiniObject * obj)
139 GST_DEBUG_OBJECT (pad, "received %" GST_PTR_FORMAT, obj);
141 GST_PAD_STREAM_LOCK (funnel->srcpad);
143 if (!gst_rtp_funnel_send_sticky (funnel, pad)) {
144 GST_PAD_STREAM_UNLOCK (funnel->srcpad);
145 gst_mini_object_unref (obj);
150 res = gst_pad_push_list (funnel->srcpad, GST_BUFFER_LIST_CAST (obj));
152 res = gst_pad_push (funnel->srcpad, GST_BUFFER_CAST (obj));
154 GST_PAD_STREAM_UNLOCK (funnel->srcpad);
160 gst_rtp_funnel_sink_chain_list (GstPad * pad, GstObject * parent,
161 GstBufferList * list)
163 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
165 return gst_rtp_funnel_sink_chain_object (pad, funnel, TRUE,
166 GST_MINI_OBJECT_CAST (list));
170 gst_rtp_funnel_sink_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
172 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
174 return gst_rtp_funnel_sink_chain_object (pad, funnel, FALSE,
175 GST_MINI_OBJECT_CAST (buffer));
179 gst_rtp_funnel_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
181 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
182 gboolean forward = TRUE;
185 GST_DEBUG_OBJECT (pad, "received event %" GST_PTR_FORMAT, event);
187 switch (GST_EVENT_TYPE (event)) {
188 case GST_EVENT_STREAM_START:
189 case GST_EVENT_SEGMENT:
197 gst_event_parse_caps (event, &caps);
199 if (!gst_caps_can_intersect (funnel->srccaps, caps)) {
200 GST_ERROR_OBJECT (funnel, "Can't intersect with caps %" GST_PTR_FORMAT,
202 g_assert_not_reached ();
205 s = gst_caps_get_structure (caps, 0);
206 if (gst_structure_get_uint (s, "ssrc", &ssrc)) {
207 GstRtpFunnelPad *fpad = GST_RTP_FUNNEL_PAD_CAST (pad);
209 GST_DEBUG_OBJECT (pad, "Got ssrc: %u", ssrc);
210 GST_OBJECT_LOCK (funnel);
211 g_hash_table_insert (funnel->ssrc_to_pad, GUINT_TO_POINTER (ssrc), pad);
212 GST_OBJECT_UNLOCK (funnel);
223 ret = gst_pad_event_default (pad, parent, event);
225 gst_event_unref (event);
232 gst_rtp_funnel_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
234 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
235 gboolean res = FALSE;
238 switch (GST_QUERY_TYPE (query)) {
241 GstCaps *filter_caps;
244 gst_query_parse_caps (query, &filter_caps);
247 new_caps = gst_caps_intersect_full (funnel->srccaps, filter_caps,
248 GST_CAPS_INTERSECT_FIRST);
250 new_caps = gst_caps_copy (funnel->srccaps);
253 if (funnel->common_ts_offset >= 0)
254 gst_caps_set_simple (new_caps, "timestamp-offset", G_TYPE_UINT,
255 (guint) funnel->common_ts_offset, NULL);
257 gst_query_set_caps_result (query, new_caps);
258 GST_DEBUG_OBJECT (pad, "Answering caps-query with caps: %"
259 GST_PTR_FORMAT, new_caps);
260 gst_caps_unref (new_caps);
265 res = gst_pad_query_default (pad, parent, query);
273 gst_rtp_funnel_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
275 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
276 gboolean handled = FALSE;
279 GST_DEBUG_OBJECT (pad, "received event %" GST_PTR_FORMAT, event);
281 if (GST_EVENT_TYPE (event) == GST_EVENT_CUSTOM_UPSTREAM) {
282 const GstStructure *s = gst_event_get_structure (event);
285 if (s && gst_structure_get_uint (s, "ssrc", &ssrc)) {
288 GST_OBJECT_LOCK (funnel);
289 fpad = g_hash_table_lookup (funnel->ssrc_to_pad, GUINT_TO_POINTER (ssrc));
291 gst_object_ref (fpad);
292 GST_OBJECT_UNLOCK (funnel);
295 GST_INFO_OBJECT (pad, "Sending %" GST_PTR_FORMAT " to %" GST_PTR_FORMAT,
297 ret = gst_pad_push_event (fpad, event);
298 gst_object_unref (fpad);
300 gst_event_unref (event);
306 gst_pad_event_default (pad, parent, event);
313 gst_rtp_funnel_request_new_pad (GstElement * element, GstPadTemplate * templ,
314 const gchar * name, const GstCaps * caps)
319 GST_DEBUG_OBJECT (element, "requesting pad");
321 sinkpad = GST_PAD_CAST (g_object_new (GST_TYPE_RTP_FUNNEL_PAD,
322 "name", name, "direction", templ->direction, "template", templ,
325 gst_pad_set_chain_function (sinkpad,
326 GST_DEBUG_FUNCPTR (gst_rtp_funnel_sink_chain));
327 gst_pad_set_chain_list_function (sinkpad,
328 GST_DEBUG_FUNCPTR (gst_rtp_funnel_sink_chain_list));
329 gst_pad_set_event_function (sinkpad,
330 GST_DEBUG_FUNCPTR (gst_rtp_funnel_sink_event));
331 gst_pad_set_query_function (sinkpad,
332 GST_DEBUG_FUNCPTR (gst_rtp_funnel_sink_query));
334 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
335 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
337 gst_pad_set_active (sinkpad, TRUE);
339 gst_element_add_pad (element, sinkpad);
341 GST_DEBUG_OBJECT (element, "requested pad %s:%s",
342 GST_DEBUG_PAD_NAME (sinkpad));
348 gst_rtp_funnel_set_property (GObject * object, guint prop_id,
349 const GValue * value, GParamSpec * pspec)
351 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (object);
354 case PROP_COMMON_TS_OFFSET:
355 funnel->common_ts_offset = g_value_get_int (value);
358 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
364 gst_rtp_funnel_get_property (GObject * object, guint prop_id, GValue * value,
367 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (object);
370 case PROP_COMMON_TS_OFFSET:
371 g_value_set_int (value, funnel->common_ts_offset);
374 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
379 static GstStateChangeReturn
380 gst_rtp_funnel_change_state (GstElement * element, GstStateChange transition)
382 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (element);
383 GstStateChangeReturn ret;
385 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
387 switch (transition) {
388 case GST_STATE_CHANGE_PAUSED_TO_READY:
389 funnel->send_sticky_events = TRUE;
399 _remove_pad_func (gpointer key, gpointer value, gpointer user_data)
402 if (GST_PAD_CAST (value) == GST_PAD_CAST (user_data))
408 gst_rtp_funnel_release_pad (GstElement * element, GstPad * pad)
410 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (element);
412 GST_DEBUG_OBJECT (funnel, "releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
414 g_hash_table_foreach_remove (funnel->ssrc_to_pad, _remove_pad_func, pad);
416 gst_pad_set_active (pad, FALSE);
417 gst_element_remove_pad (GST_ELEMENT_CAST (funnel), pad);
421 gst_rtp_funnel_finalize (GObject * object)
423 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (object);
425 gst_caps_unref (funnel->srccaps);
426 g_hash_table_destroy (funnel->ssrc_to_pad);
428 G_OBJECT_CLASS (parent_class)->finalize (object);
432 gst_rtp_funnel_class_init (GstRtpFunnelClass * klass)
434 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
435 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
437 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_rtp_funnel_finalize);
438 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_rtp_funnel_get_property);
439 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_rtp_funnel_set_property);
440 gstelement_class->request_new_pad =
441 GST_DEBUG_FUNCPTR (gst_rtp_funnel_request_new_pad);
442 gstelement_class->release_pad =
443 GST_DEBUG_FUNCPTR (gst_rtp_funnel_release_pad);
444 gstelement_class->change_state =
445 GST_DEBUG_FUNCPTR (gst_rtp_funnel_change_state);
447 gst_element_class_set_static_metadata (gstelement_class, "RTP funnel",
449 "Funnel RTP buffers together for multiplexing",
450 "Havard Graff <havard@gstip.com>");
452 gst_element_class_add_static_pad_template (gstelement_class, &sink_template);
453 gst_element_class_add_static_pad_template (gstelement_class, &src_template);
455 g_object_class_install_property (gobject_class, PROP_COMMON_TS_OFFSET,
456 g_param_spec_int ("common-ts-offset", "Common Timestamp Offset",
457 "Use the same RTP timestamp offset for all sinkpads (-1 = disable)",
458 -1, G_MAXINT32, DEFAULT_COMMON_TS_OFFSET,
459 G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
461 GST_DEBUG_CATEGORY_INIT (gst_rtp_funnel_debug,
462 "gstrtpfunnel", 0, "funnel element");
466 gst_rtp_funnel_init (GstRtpFunnel * funnel)
468 funnel->srcpad = gst_pad_new_from_static_template (&src_template, "src");
469 gst_pad_use_fixed_caps (funnel->srcpad);
470 gst_pad_set_event_function (funnel->srcpad,
471 GST_DEBUG_FUNCPTR (gst_rtp_funnel_src_event));
472 gst_element_add_pad (GST_ELEMENT (funnel), funnel->srcpad);
474 funnel->send_sticky_events = TRUE;
475 funnel->srccaps = gst_caps_new_empty_simple (RTP_CAPS);
476 funnel->ssrc_to_pad = g_hash_table_new (NULL, NULL);