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;
78 /* The last pad data was chained on */
82 gint common_ts_offset;
85 #define RTP_CAPS "application/x-rtp"
87 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink_%u",
90 GST_STATIC_CAPS (RTP_CAPS));
92 static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
95 GST_STATIC_CAPS (RTP_CAPS));
97 #define gst_rtp_funnel_parent_class parent_class
98 G_DEFINE_TYPE (GstRtpFunnel, gst_rtp_funnel, GST_TYPE_ELEMENT);
102 gst_rtp_funnel_send_sticky (GstRtpFunnel * funnel, GstPad * pad)
104 GstEvent *stream_start;
107 if (!funnel->send_sticky_events)
110 stream_start = gst_pad_get_sticky_event (pad, GST_EVENT_STREAM_START, 0);
111 if (stream_start && !gst_pad_push_event (funnel->srcpad, stream_start)) {
112 GST_ERROR_OBJECT (funnel, "Could not push stream start");
116 caps = gst_event_new_caps (funnel->srccaps);
117 if (caps && !gst_pad_push_event (funnel->srcpad, caps)) {
118 GST_ERROR_OBJECT (funnel, "Could not push caps");
122 funnel->send_sticky_events = FALSE;
129 gst_rtp_funnel_forward_segment (GstRtpFunnel * funnel, GstPad * pad)
133 if (pad == funnel->current_pad) {
137 segment = gst_pad_get_sticky_event (pad, GST_EVENT_SEGMENT, 0);
138 if (segment && !gst_pad_push_event (funnel->srcpad, segment)) {
139 GST_ERROR_OBJECT (funnel, "Could not push segment");
143 funnel->current_pad = pad;
150 gst_rtp_funnel_sink_chain_object (GstPad * pad, GstRtpFunnel * funnel,
151 gboolean is_list, GstMiniObject * obj)
155 GST_DEBUG_OBJECT (pad, "received %" GST_PTR_FORMAT, obj);
157 GST_PAD_STREAM_LOCK (funnel->srcpad);
159 gst_rtp_funnel_send_sticky (funnel, pad);
160 gst_rtp_funnel_forward_segment (funnel, pad);
163 res = gst_pad_push_list (funnel->srcpad, GST_BUFFER_LIST_CAST (obj));
165 res = gst_pad_push (funnel->srcpad, GST_BUFFER_CAST (obj));
167 GST_PAD_STREAM_UNLOCK (funnel->srcpad);
173 gst_rtp_funnel_sink_chain_list (GstPad * pad, GstObject * parent,
174 GstBufferList * list)
176 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
178 return gst_rtp_funnel_sink_chain_object (pad, funnel, TRUE,
179 GST_MINI_OBJECT_CAST (list));
183 gst_rtp_funnel_sink_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
185 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
187 return gst_rtp_funnel_sink_chain_object (pad, funnel, FALSE,
188 GST_MINI_OBJECT_CAST (buffer));
192 gst_rtp_funnel_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
194 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
195 gboolean forward = TRUE;
198 GST_DEBUG_OBJECT (pad, "received event %" GST_PTR_FORMAT, event);
200 switch (GST_EVENT_TYPE (event)) {
201 case GST_EVENT_STREAM_START:
202 case GST_EVENT_SEGMENT:
210 gst_event_parse_caps (event, &caps);
212 if (!gst_caps_can_intersect (funnel->srccaps, caps)) {
213 GST_ERROR_OBJECT (funnel, "Can't intersect with caps %" GST_PTR_FORMAT,
215 g_assert_not_reached ();
218 s = gst_caps_get_structure (caps, 0);
219 if (gst_structure_get_uint (s, "ssrc", &ssrc)) {
220 GstRtpFunnelPad *fpad = GST_RTP_FUNNEL_PAD_CAST (pad);
222 GST_DEBUG_OBJECT (pad, "Got ssrc: %u", ssrc);
223 GST_OBJECT_LOCK (funnel);
224 g_hash_table_insert (funnel->ssrc_to_pad, GUINT_TO_POINTER (ssrc), pad);
225 GST_OBJECT_UNLOCK (funnel);
236 ret = gst_pad_event_default (pad, parent, event);
238 gst_event_unref (event);
245 gst_rtp_funnel_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
247 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
248 gboolean res = FALSE;
251 switch (GST_QUERY_TYPE (query)) {
254 GstCaps *filter_caps;
257 gst_query_parse_caps (query, &filter_caps);
260 new_caps = gst_caps_intersect_full (funnel->srccaps, filter_caps,
261 GST_CAPS_INTERSECT_FIRST);
263 new_caps = gst_caps_copy (funnel->srccaps);
266 if (funnel->common_ts_offset >= 0)
267 gst_caps_set_simple (new_caps, "timestamp-offset", G_TYPE_UINT,
268 (guint) funnel->common_ts_offset, NULL);
270 gst_query_set_caps_result (query, new_caps);
271 GST_DEBUG_OBJECT (pad, "Answering caps-query with caps: %"
272 GST_PTR_FORMAT, new_caps);
273 gst_caps_unref (new_caps);
278 res = gst_pad_query_default (pad, parent, query);
286 gst_rtp_funnel_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
288 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
289 gboolean handled = FALSE;
292 GST_DEBUG_OBJECT (pad, "received event %" GST_PTR_FORMAT, event);
294 if (GST_EVENT_TYPE (event) == GST_EVENT_CUSTOM_UPSTREAM) {
295 const GstStructure *s = gst_event_get_structure (event);
298 if (s && gst_structure_get_uint (s, "ssrc", &ssrc)) {
301 GST_OBJECT_LOCK (funnel);
302 fpad = g_hash_table_lookup (funnel->ssrc_to_pad, GUINT_TO_POINTER (ssrc));
304 gst_object_ref (fpad);
305 GST_OBJECT_UNLOCK (funnel);
308 GST_INFO_OBJECT (pad, "Sending %" GST_PTR_FORMAT " to %" GST_PTR_FORMAT,
310 ret = gst_pad_push_event (fpad, event);
311 gst_object_unref (fpad);
313 gst_event_unref (event);
319 gst_pad_event_default (pad, parent, event);
326 gst_rtp_funnel_request_new_pad (GstElement * element, GstPadTemplate * templ,
327 const gchar * name, const GstCaps * caps)
332 GST_DEBUG_OBJECT (element, "requesting pad");
334 sinkpad = GST_PAD_CAST (g_object_new (GST_TYPE_RTP_FUNNEL_PAD,
335 "name", name, "direction", templ->direction, "template", templ,
338 gst_pad_set_chain_function (sinkpad,
339 GST_DEBUG_FUNCPTR (gst_rtp_funnel_sink_chain));
340 gst_pad_set_chain_list_function (sinkpad,
341 GST_DEBUG_FUNCPTR (gst_rtp_funnel_sink_chain_list));
342 gst_pad_set_event_function (sinkpad,
343 GST_DEBUG_FUNCPTR (gst_rtp_funnel_sink_event));
344 gst_pad_set_query_function (sinkpad,
345 GST_DEBUG_FUNCPTR (gst_rtp_funnel_sink_query));
347 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
348 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
350 gst_pad_set_active (sinkpad, TRUE);
352 gst_element_add_pad (element, sinkpad);
354 GST_DEBUG_OBJECT (element, "requested pad %s:%s",
355 GST_DEBUG_PAD_NAME (sinkpad));
361 gst_rtp_funnel_set_property (GObject * object, guint prop_id,
362 const GValue * value, GParamSpec * pspec)
364 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (object);
367 case PROP_COMMON_TS_OFFSET:
368 funnel->common_ts_offset = g_value_get_int (value);
371 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
377 gst_rtp_funnel_get_property (GObject * object, guint prop_id, GValue * value,
380 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (object);
383 case PROP_COMMON_TS_OFFSET:
384 g_value_set_int (value, funnel->common_ts_offset);
387 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
392 static GstStateChangeReturn
393 gst_rtp_funnel_change_state (GstElement * element, GstStateChange transition)
395 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (element);
396 GstStateChangeReturn ret;
398 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
400 switch (transition) {
401 case GST_STATE_CHANGE_PAUSED_TO_READY:
402 funnel->send_sticky_events = TRUE;
412 _remove_pad_func (gpointer key, gpointer value, gpointer user_data)
415 if (GST_PAD_CAST (value) == GST_PAD_CAST (user_data))
421 gst_rtp_funnel_release_pad (GstElement * element, GstPad * pad)
423 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (element);
425 GST_DEBUG_OBJECT (funnel, "releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
427 g_hash_table_foreach_remove (funnel->ssrc_to_pad, _remove_pad_func, pad);
429 gst_pad_set_active (pad, FALSE);
430 gst_element_remove_pad (GST_ELEMENT_CAST (funnel), pad);
434 gst_rtp_funnel_finalize (GObject * object)
436 GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (object);
438 gst_caps_unref (funnel->srccaps);
439 g_hash_table_destroy (funnel->ssrc_to_pad);
441 G_OBJECT_CLASS (parent_class)->finalize (object);
445 gst_rtp_funnel_class_init (GstRtpFunnelClass * klass)
447 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
448 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
450 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_rtp_funnel_finalize);
451 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_rtp_funnel_get_property);
452 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_rtp_funnel_set_property);
453 gstelement_class->request_new_pad =
454 GST_DEBUG_FUNCPTR (gst_rtp_funnel_request_new_pad);
455 gstelement_class->release_pad =
456 GST_DEBUG_FUNCPTR (gst_rtp_funnel_release_pad);
457 gstelement_class->change_state =
458 GST_DEBUG_FUNCPTR (gst_rtp_funnel_change_state);
460 gst_element_class_set_static_metadata (gstelement_class, "RTP funnel",
462 "Funnel RTP buffers together for multiplexing",
463 "Havard Graff <havard@gstip.com>");
465 gst_element_class_add_static_pad_template (gstelement_class, &sink_template);
466 gst_element_class_add_static_pad_template (gstelement_class, &src_template);
468 g_object_class_install_property (gobject_class, PROP_COMMON_TS_OFFSET,
469 g_param_spec_int ("common-ts-offset", "Common Timestamp Offset",
470 "Use the same RTP timestamp offset for all sinkpads (-1 = disable)",
471 -1, G_MAXINT32, DEFAULT_COMMON_TS_OFFSET,
472 G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
474 GST_DEBUG_CATEGORY_INIT (gst_rtp_funnel_debug,
475 "gstrtpfunnel", 0, "funnel element");
479 gst_rtp_funnel_init (GstRtpFunnel * funnel)
481 funnel->srcpad = gst_pad_new_from_static_template (&src_template, "src");
482 gst_pad_use_fixed_caps (funnel->srcpad);
483 gst_pad_set_event_function (funnel->srcpad,
484 GST_DEBUG_FUNCPTR (gst_rtp_funnel_src_event));
485 gst_element_add_pad (GST_ELEMENT (funnel), funnel->srcpad);
487 funnel->send_sticky_events = TRUE;
488 funnel->srccaps = gst_caps_new_empty_simple (RTP_CAPS);
489 funnel->ssrc_to_pad = g_hash_table_new (NULL, NULL);
490 funnel->current_pad = NULL;