1 /* RTP Retransmission sender element for GStreamer
5 * Copyright (C) 2013 Collabora Ltd.
6 * @author Julien Isorce <julien.isorce@collabora.co.uk>
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.
25 * SECTION:element-rtprtxsend
27 * See #GstRtpRtxReceive for examples
29 * The purpose of the sender RTX object is to keep a history of RTP packets up
30 * to a configurable limit (max-size-time or max-size-packets). It will listen
31 * for upstream custom retransmission events (GstRTPRetransmissionRequest) that
32 * comes from downstream (#GstRtpSession). When receiving a request it will
33 * look up the requested seqnum in its list of stored packets. If the packet
34 * is available, it will create a RTX packet according to RFC 4588 and send
35 * this as an auxiliary stream. RTX is SSRC-multiplexed
43 #include <gst/rtp/gstrtpbuffer.h>
47 #include "gstrtprtxsend.h"
49 GST_DEBUG_CATEGORY_STATIC (gst_rtp_rtx_send_debug);
50 #define GST_CAT_DEFAULT gst_rtp_rtx_send_debug
52 #define DEFAULT_RTX_PAYLOAD_TYPE 0
53 #define DEFAULT_MAX_SIZE_TIME 0
54 #define DEFAULT_MAX_SIZE_PACKETS 100
60 PROP_PAYLOAD_TYPE_MAP,
62 PROP_MAX_SIZE_PACKETS,
63 PROP_NUM_RTX_REQUESTS,
68 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
71 GST_STATIC_CAPS ("application/x-rtp")
74 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
77 GST_STATIC_CAPS ("application/x-rtp")
80 static gboolean gst_rtp_rtx_send_src_event (GstPad * pad, GstObject * parent,
82 static gboolean gst_rtp_rtx_send_sink_event (GstPad * pad, GstObject * parent,
84 static GstFlowReturn gst_rtp_rtx_send_chain (GstPad * pad, GstObject * parent,
87 static GstStateChangeReturn gst_rtp_rtx_send_change_state (GstElement *
88 element, GstStateChange transition);
90 static void gst_rtp_rtx_send_set_property (GObject * object, guint prop_id,
91 const GValue * value, GParamSpec * pspec);
92 static void gst_rtp_rtx_send_get_property (GObject * object, guint prop_id,
93 GValue * value, GParamSpec * pspec);
94 static void gst_rtp_rtx_send_finalize (GObject * object);
96 G_DEFINE_TYPE (GstRtpRtxSend, gst_rtp_rtx_send, GST_TYPE_ELEMENT);
106 buffer_queue_item_free (BufferQueueItem * item)
108 gst_buffer_unref (item->buffer);
118 /* history of rtp packets */
123 ssrc_rtx_data_new (guint32 rtx_ssrc)
125 SSRCRtxData *data = g_new0 (SSRCRtxData, 1);
127 data->rtx_ssrc = rtx_ssrc;
128 data->next_seqnum = g_random_int_range (0, G_MAXUINT16);
129 data->queue = g_sequence_new ((GDestroyNotify) buffer_queue_item_free);
135 ssrc_rtx_data_free (SSRCRtxData * data)
137 g_sequence_free (data->queue);
142 gst_rtp_rtx_send_class_init (GstRtpRtxSendClass * klass)
144 GObjectClass *gobject_class;
145 GstElementClass *gstelement_class;
147 gobject_class = (GObjectClass *) klass;
148 gstelement_class = (GstElementClass *) klass;
150 gobject_class->get_property = gst_rtp_rtx_send_get_property;
151 gobject_class->set_property = gst_rtp_rtx_send_set_property;
152 gobject_class->finalize = gst_rtp_rtx_send_finalize;
154 g_object_class_install_property (gobject_class, PROP_SSRC_MAP,
155 g_param_spec_boxed ("ssrc-map", "SSRC Map",
156 "Map of SSRCs to their retransmission SSRCs for SSRC-multiplexed mode"
157 " (default = random)", GST_TYPE_STRUCTURE,
158 G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
160 g_object_class_install_property (gobject_class, PROP_PAYLOAD_TYPE_MAP,
161 g_param_spec_boxed ("payload-type-map", "Payload Type Map",
162 "Map of original payload types to their retransmission payload types",
163 GST_TYPE_STRUCTURE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
165 g_object_class_install_property (gobject_class, PROP_MAX_SIZE_TIME,
166 g_param_spec_uint ("max-size-time", "Max Size Time",
167 "Amount of ms to queue (0 = unlimited)", 0, G_MAXUINT,
168 DEFAULT_MAX_SIZE_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
170 g_object_class_install_property (gobject_class, PROP_MAX_SIZE_PACKETS,
171 g_param_spec_uint ("max-size-packets", "Max Size Packets",
172 "Amount of packets to queue (0 = unlimited)", 0, G_MAXINT16,
173 DEFAULT_MAX_SIZE_PACKETS,
174 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
176 g_object_class_install_property (gobject_class, PROP_NUM_RTX_REQUESTS,
177 g_param_spec_uint ("num-rtx-requests", "Num RTX Requests",
178 "Number of retransmission events received", 0, G_MAXUINT,
179 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
181 g_object_class_install_property (gobject_class, PROP_NUM_RTX_PACKETS,
182 g_param_spec_uint ("num-rtx-packets", "Num RTX Packets",
183 " Number of retransmission packets sent", 0, G_MAXUINT,
184 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
186 gst_element_class_add_pad_template (gstelement_class,
187 gst_static_pad_template_get (&src_factory));
188 gst_element_class_add_pad_template (gstelement_class,
189 gst_static_pad_template_get (&sink_factory));
191 gst_element_class_set_static_metadata (gstelement_class,
192 "RTP Retransmission Sender", "Codec",
193 "Retransmit RTP packets when needed, according to RFC4588",
194 "Julien Isorce <julien.isorce@collabora.co.uk>");
196 gstelement_class->change_state =
197 GST_DEBUG_FUNCPTR (gst_rtp_rtx_send_change_state);
201 gst_rtp_rtx_send_reset (GstRtpRtxSend * rtx, gboolean full)
203 GST_OBJECT_LOCK (rtx);
204 g_queue_foreach (rtx->pending, (GFunc) gst_buffer_unref, NULL);
205 g_queue_clear (rtx->pending);
206 g_hash_table_remove_all (rtx->ssrc_data);
207 g_hash_table_remove_all (rtx->rtx_ssrcs);
208 rtx->num_rtx_requests = 0;
209 rtx->num_rtx_packets = 0;
210 GST_OBJECT_UNLOCK (rtx);
214 gst_rtp_rtx_send_finalize (GObject * object)
216 GstRtpRtxSend *rtx = GST_RTP_RTX_SEND (object);
218 gst_rtp_rtx_send_reset (rtx, TRUE);
220 g_hash_table_unref (rtx->ssrc_data);
221 g_hash_table_unref (rtx->rtx_ssrcs);
222 if (rtx->external_ssrc_map)
223 gst_structure_free (rtx->external_ssrc_map);
224 g_hash_table_unref (rtx->rtx_pt_map);
225 if (rtx->rtx_pt_map_structure)
226 gst_structure_free (rtx->rtx_pt_map_structure);
227 g_queue_free (rtx->pending);
229 G_OBJECT_CLASS (gst_rtp_rtx_send_parent_class)->finalize (object);
233 gst_rtp_rtx_send_init (GstRtpRtxSend * rtx)
235 GstElementClass *klass = GST_ELEMENT_GET_CLASS (rtx);
238 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
240 GST_PAD_SET_PROXY_CAPS (rtx->srcpad);
241 GST_PAD_SET_PROXY_ALLOCATION (rtx->srcpad);
242 gst_pad_set_event_function (rtx->srcpad,
243 GST_DEBUG_FUNCPTR (gst_rtp_rtx_send_src_event));
244 gst_element_add_pad (GST_ELEMENT (rtx), rtx->srcpad);
247 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
249 GST_PAD_SET_PROXY_CAPS (rtx->sinkpad);
250 GST_PAD_SET_PROXY_ALLOCATION (rtx->sinkpad);
251 gst_pad_set_event_function (rtx->sinkpad,
252 GST_DEBUG_FUNCPTR (gst_rtp_rtx_send_sink_event));
253 gst_pad_set_chain_function (rtx->sinkpad,
254 GST_DEBUG_FUNCPTR (gst_rtp_rtx_send_chain));
255 gst_element_add_pad (GST_ELEMENT (rtx), rtx->sinkpad);
257 rtx->pending = g_queue_new ();
258 rtx->ssrc_data = g_hash_table_new_full (g_direct_hash, g_direct_equal,
259 NULL, (GDestroyNotify) ssrc_rtx_data_free);
260 rtx->rtx_ssrcs = g_hash_table_new (g_direct_hash, g_direct_equal);
261 rtx->rtx_pt_map = g_hash_table_new (g_direct_hash, g_direct_equal);
263 rtx->max_size_time = DEFAULT_MAX_SIZE_TIME;
264 rtx->max_size_packets = DEFAULT_MAX_SIZE_PACKETS;
268 gst_rtp_rtx_send_choose_ssrc (GstRtpRtxSend * rtx, guint32 choice,
269 gboolean consider_choice)
271 guint32 ssrc = consider_choice ? choice : g_random_int ();
273 /* make sure to be different than any other */
274 while (g_hash_table_contains (rtx->ssrc_data, GUINT_TO_POINTER (ssrc)) ||
275 g_hash_table_contains (rtx->rtx_ssrcs, GUINT_TO_POINTER (ssrc))) {
276 ssrc = g_random_int ();
283 gst_rtp_rtx_send_get_ssrc_data (GstRtpRtxSend * rtx, guint32 ssrc)
287 gboolean consider = FALSE;
289 if (G_UNLIKELY (!g_hash_table_contains (rtx->ssrc_data,
290 GUINT_TO_POINTER (ssrc)))) {
291 if (rtx->external_ssrc_map) {
293 ssrc_str = g_strdup_printf ("%" G_GUINT32_FORMAT, ssrc);
294 consider = gst_structure_get_uint (rtx->external_ssrc_map, ssrc_str,
298 rtx_ssrc = gst_rtp_rtx_send_choose_ssrc (rtx, rtx_ssrc, consider);
299 data = ssrc_rtx_data_new (rtx_ssrc);
300 g_hash_table_insert (rtx->ssrc_data, GUINT_TO_POINTER (ssrc), data);
301 g_hash_table_insert (rtx->rtx_ssrcs, GUINT_TO_POINTER (rtx_ssrc),
302 GUINT_TO_POINTER (ssrc));
304 data = g_hash_table_lookup (rtx->ssrc_data, GUINT_TO_POINTER (ssrc));
310 buffer_queue_items_cmp (BufferQueueItem * a, BufferQueueItem * b,
313 /* gst_rtp_buffer_compare_seqnum returns the opposite of what we want,
314 * it returns negative when seqnum1 > seqnum2 and we want negative
315 * when b > a, i.e. a is smaller, so it comes first in the sequence */
316 return gst_rtp_buffer_compare_seqnum (b->seqnum, a->seqnum);
320 gst_rtp_rtx_send_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
322 GstRtpRtxSend *rtx = GST_RTP_RTX_SEND (parent);
325 switch (GST_EVENT_TYPE (event)) {
326 case GST_EVENT_CUSTOM_UPSTREAM:
328 const GstStructure *s = gst_event_get_structure (event);
330 /* This event usually comes from the downstream gstrtpsession */
331 if (gst_structure_has_name (s, "GstRTPRetransmissionRequest")) {
335 /* retrieve seqnum of the packet that need to be restransmisted */
336 if (!gst_structure_get_uint (s, "seqnum", &seqnum))
339 /* retrieve ssrc of the packet that need to be restransmisted */
340 if (!gst_structure_get_uint (s, "ssrc", &ssrc))
343 GST_DEBUG_OBJECT (rtx,
344 "request seqnum: %" G_GUINT32_FORMAT ", ssrc: %" G_GUINT32_FORMAT,
347 GST_OBJECT_LOCK (rtx);
348 /* check if request is for us */
349 if (g_hash_table_contains (rtx->ssrc_data, GUINT_TO_POINTER (ssrc))) {
352 BufferQueueItem search_item;
354 /* update statistics */
355 ++rtx->num_rtx_requests;
357 data = gst_rtp_rtx_send_get_ssrc_data (rtx, ssrc);
359 search_item.seqnum = seqnum;
360 iter = g_sequence_lookup (data->queue, &search_item,
361 (GCompareDataFunc) buffer_queue_items_cmp, NULL);
363 BufferQueueItem *item = g_sequence_get (iter);
364 GST_DEBUG_OBJECT (rtx, "found %" G_GUINT16_FORMAT, item->seqnum);
365 g_queue_push_tail (rtx->pending, gst_buffer_ref (item->buffer));
368 GST_OBJECT_UNLOCK (rtx);
370 gst_event_unref (event);
373 /* This event usually comes from the downstream gstrtpsession */
374 } else if (gst_structure_has_name (s, "GstRTPCollision")) {
377 if (!gst_structure_get_uint (s, "ssrc", &ssrc))
380 GST_DEBUG_OBJECT (rtx, "collision ssrc: %" G_GUINT32_FORMAT, ssrc);
382 GST_OBJECT_LOCK (rtx);
384 /* choose another ssrc for our retransmited stream */
385 if (g_hash_table_contains (rtx->rtx_ssrcs, GUINT_TO_POINTER (ssrc))) {
389 master_ssrc = GPOINTER_TO_UINT (g_hash_table_lookup (rtx->rtx_ssrcs,
390 GUINT_TO_POINTER (ssrc)));
391 data = gst_rtp_rtx_send_get_ssrc_data (rtx, master_ssrc);
393 /* change rtx_ssrc and update the reverse map */
394 data->rtx_ssrc = gst_rtp_rtx_send_choose_ssrc (rtx, 0, FALSE);
395 g_hash_table_remove (rtx->rtx_ssrcs, GUINT_TO_POINTER (ssrc));
396 g_hash_table_insert (rtx->rtx_ssrcs,
397 GUINT_TO_POINTER (data->rtx_ssrc),
398 GUINT_TO_POINTER (master_ssrc));
400 GST_OBJECT_UNLOCK (rtx);
402 /* no need to forward to payloader because we make sure to have
405 gst_event_unref (event);
408 /* if master ssrc has collided, remove it from our data, as it
409 * is not going to be used any longer */
410 if (g_hash_table_contains (rtx->ssrc_data, GUINT_TO_POINTER (ssrc))) {
412 data = gst_rtp_rtx_send_get_ssrc_data (rtx, ssrc);
413 g_hash_table_remove (rtx->rtx_ssrcs,
414 GUINT_TO_POINTER (data->rtx_ssrc));
415 g_hash_table_remove (rtx->ssrc_data, GUINT_TO_POINTER (ssrc));
418 GST_OBJECT_UNLOCK (rtx);
420 /* forward event to payloader in case collided ssrc is
422 res = gst_pad_event_default (pad, parent, event);
425 res = gst_pad_event_default (pad, parent, event);
430 res = gst_pad_event_default (pad, parent, event);
437 gst_rtp_rtx_send_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
439 GstRtpRtxSend *rtx = GST_RTP_RTX_SEND (parent);
441 switch (GST_EVENT_TYPE (event)) {
449 gst_event_parse_caps (event, &caps);
450 g_assert (gst_caps_is_fixed (caps));
452 s = gst_caps_get_structure (caps, 0);
453 gst_structure_get_uint (s, "ssrc", &ssrc);
454 data = gst_rtp_rtx_send_get_ssrc_data (rtx, ssrc);
455 gst_structure_get_int (s, "clock-rate", &data->clock_rate);
457 GST_DEBUG_OBJECT (rtx, "got clock-rate from caps: %d for ssrc: %u",
458 data->clock_rate, ssrc);
465 return gst_pad_event_default (pad, parent, event);
468 /* like rtp_jitter_buffer_get_ts_diff() */
470 gst_rtp_rtx_send_get_ts_diff (SSRCRtxData * data)
472 guint64 high_ts, low_ts;
473 BufferQueueItem *high_buf, *low_buf;
477 g_sequence_get (g_sequence_iter_prev (g_sequence_get_end_iter
479 low_buf = g_sequence_get (g_sequence_get_begin_iter (data->queue));
481 if (!high_buf || !low_buf || high_buf == low_buf)
484 high_ts = high_buf->timestamp;
485 low_ts = low_buf->timestamp;
487 /* it needs to work if ts wraps */
488 if (high_ts >= low_ts) {
489 result = (guint32) (high_ts - low_ts);
491 result = (guint32) (high_ts + G_MAXUINT32 + 1 - low_ts);
494 /* return value in ms instead of clock ticks */
495 return (guint32) gst_util_uint64_scale_int (result, 1000, data->clock_rate);
498 /* Copy fixed header and extension. Add OSN before to copy payload
499 * Copy memory to avoid to manually copy each rtp buffer field.
502 _gst_rtp_rtx_buffer_new (GstRtpRtxSend * rtx, GstBuffer * buffer)
504 GstMemory *mem = NULL;
505 GstRTPBuffer rtp = GST_RTP_BUFFER_INIT;
506 GstRTPBuffer new_rtp = GST_RTP_BUFFER_INIT;
507 GstBuffer *new_buffer = gst_buffer_new ();
509 guint payload_len = 0;
515 gst_rtp_buffer_map (buffer, GST_MAP_READ, &rtp);
517 /* get needed data from GstRtpRtxSend */
518 ssrc = gst_rtp_buffer_get_ssrc (&rtp);
519 data = gst_rtp_rtx_send_get_ssrc_data (rtx, ssrc);
520 ssrc = data->rtx_ssrc;
521 seqnum = data->next_seqnum++;
522 fmtp = GPOINTER_TO_UINT (g_hash_table_lookup (rtx->rtx_pt_map,
523 GUINT_TO_POINTER (gst_rtp_buffer_get_payload_type (&rtp))));
525 GST_DEBUG_OBJECT (rtx,
526 "retransmit seqnum: %" G_GUINT16_FORMAT ", ssrc: %" G_GUINT32_FORMAT,
529 /* gst_rtp_buffer_map does not map the payload so do it now */
530 gst_rtp_buffer_get_payload (&rtp);
532 /* If payload type is not set through SDP/property then
533 * just bump the value */
535 fmtp = gst_rtp_buffer_get_payload_type (&rtp) + 1;
537 /* copy fixed header */
538 mem = gst_memory_copy (rtp.map[0].memory, 0, rtp.size[0]);
539 gst_buffer_append_memory (new_buffer, mem);
541 /* copy extension if any */
543 mem = gst_memory_copy (rtp.map[1].memory, 0, rtp.size[1]);
544 gst_buffer_append_memory (new_buffer, mem);
547 /* copy payload and add OSN just before */
548 payload_len = 2 + rtp.size[2];
549 mem = gst_allocator_alloc (NULL, payload_len, NULL);
551 gst_memory_map (mem, &map, GST_MAP_WRITE);
552 GST_WRITE_UINT16_BE (map.data, gst_rtp_buffer_get_seq (&rtp));
554 memcpy (map.data + 2, rtp.data[2], rtp.size[2]);
555 gst_memory_unmap (mem, &map);
556 gst_buffer_append_memory (new_buffer, mem);
558 /* everything needed is copied */
559 gst_rtp_buffer_unmap (&rtp);
561 /* set ssrc, seqnum and fmtp */
562 gst_rtp_buffer_map (new_buffer, GST_MAP_WRITE, &new_rtp);
563 gst_rtp_buffer_set_ssrc (&new_rtp, ssrc);
564 gst_rtp_buffer_set_seq (&new_rtp, seqnum);
565 gst_rtp_buffer_set_payload_type (&new_rtp, fmtp);
566 /* RFC 4588: let other elements do the padding, as normal */
567 gst_rtp_buffer_set_padding (&new_rtp, FALSE);
568 gst_rtp_buffer_unmap (&new_rtp);
573 /* push pending retransmission packet.
574 * it constructs rtx packet from original packets */
576 do_push (GstBuffer * buffer, GstRtpRtxSend * rtx)
578 gst_pad_push (rtx->srcpad, _gst_rtp_rtx_buffer_new (rtx, buffer));
582 gst_rtp_rtx_send_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
584 GstRtpRtxSend *rtx = GST_RTP_RTX_SEND (parent);
585 GstFlowReturn ret = GST_FLOW_ERROR;
586 GQueue *pending = NULL;
587 GstRTPBuffer rtp = GST_RTP_BUFFER_INIT;
588 BufferQueueItem *item;
592 guint32 ssrc, rtptime;
594 /* read the information we want from the buffer */
595 gst_rtp_buffer_map (buffer, GST_MAP_READ, &rtp);
596 seqnum = gst_rtp_buffer_get_seq (&rtp);
597 payload_type = gst_rtp_buffer_get_payload_type (&rtp);
598 ssrc = gst_rtp_buffer_get_ssrc (&rtp);
599 rtptime = gst_rtp_buffer_get_timestamp (&rtp);
600 gst_rtp_buffer_unmap (&rtp);
602 GST_OBJECT_LOCK (rtx);
604 /* do not store the buffer if it's payload type is unknown */
605 if (g_hash_table_contains (rtx->rtx_pt_map, GUINT_TO_POINTER (payload_type))) {
606 data = gst_rtp_rtx_send_get_ssrc_data (rtx, ssrc);
608 /* add current rtp buffer to queue history */
609 item = g_new0 (BufferQueueItem, 1);
610 item->seqnum = seqnum;
611 item->timestamp = rtptime;
612 item->buffer = gst_buffer_ref (buffer);
613 g_sequence_append (data->queue, item);
615 /* remove oldest packets from history if they are too many */
616 if (rtx->max_size_packets) {
617 while (g_sequence_get_length (data->queue) > rtx->max_size_packets)
618 g_sequence_remove (g_sequence_get_begin_iter (data->queue));
620 if (rtx->max_size_time) {
621 while (gst_rtp_rtx_send_get_ts_diff (data) > rtx->max_size_time)
622 g_sequence_remove (g_sequence_get_begin_iter (data->queue));
626 /* within lock, get packets that have to be retransmited */
627 if (g_queue_get_length (rtx->pending) > 0) {
628 pending = rtx->pending;
629 rtx->pending = g_queue_new ();
631 /* update statistics - assume we will succeed to retransmit those packets */
632 rtx->num_rtx_packets += g_queue_get_length (pending);
635 /* no need to hold the lock to push rtx packets */
636 GST_OBJECT_UNLOCK (rtx);
638 /* retransmit requested packets */
640 g_queue_foreach (pending, (GFunc) do_push, rtx);
641 g_queue_free_full (pending, (GDestroyNotify) gst_buffer_unref);
645 "push seqnum: %" G_GUINT16_FORMAT ", ssrc: %" G_GUINT32_FORMAT, seqnum,
648 /* push current rtp packet */
649 ret = gst_pad_push (rtx->srcpad, buffer);
655 gst_rtp_rtx_send_get_property (GObject * object,
656 guint prop_id, GValue * value, GParamSpec * pspec)
658 GstRtpRtxSend *rtx = GST_RTP_RTX_SEND (object);
661 case PROP_PAYLOAD_TYPE_MAP:
662 GST_OBJECT_LOCK (rtx);
663 g_value_set_boxed (value, rtx->rtx_pt_map_structure);
664 GST_OBJECT_UNLOCK (rtx);
666 case PROP_MAX_SIZE_TIME:
667 GST_OBJECT_LOCK (rtx);
668 g_value_set_uint (value, rtx->max_size_time);
669 GST_OBJECT_UNLOCK (rtx);
671 case PROP_MAX_SIZE_PACKETS:
672 GST_OBJECT_LOCK (rtx);
673 g_value_set_uint (value, rtx->max_size_packets);
674 GST_OBJECT_UNLOCK (rtx);
676 case PROP_NUM_RTX_REQUESTS:
677 GST_OBJECT_LOCK (rtx);
678 g_value_set_uint (value, rtx->num_rtx_requests);
679 GST_OBJECT_UNLOCK (rtx);
681 case PROP_NUM_RTX_PACKETS:
682 GST_OBJECT_LOCK (rtx);
683 g_value_set_uint (value, rtx->num_rtx_packets);
684 GST_OBJECT_UNLOCK (rtx);
687 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
693 structure_to_hash_table (GQuark field_id, const GValue * value, gpointer hash)
695 const gchar *field_str;
699 field_str = g_quark_to_string (field_id);
700 field_uint = atoi (field_str);
701 value_uint = g_value_get_uint (value);
702 g_hash_table_insert ((GHashTable *) hash, GUINT_TO_POINTER (field_uint),
703 GUINT_TO_POINTER (value_uint));
709 gst_rtp_rtx_send_set_property (GObject * object,
710 guint prop_id, const GValue * value, GParamSpec * pspec)
712 GstRtpRtxSend *rtx = GST_RTP_RTX_SEND (object);
716 GST_OBJECT_LOCK (rtx);
717 if (rtx->external_ssrc_map)
718 gst_structure_free (rtx->external_ssrc_map);
719 rtx->external_ssrc_map = g_value_dup_boxed (value);
720 GST_OBJECT_UNLOCK (rtx);
722 case PROP_PAYLOAD_TYPE_MAP:
723 GST_OBJECT_LOCK (rtx);
724 if (rtx->rtx_pt_map_structure)
725 gst_structure_free (rtx->rtx_pt_map_structure);
726 rtx->rtx_pt_map_structure = g_value_dup_boxed (value);
727 g_hash_table_remove_all (rtx->rtx_pt_map);
728 gst_structure_foreach (rtx->rtx_pt_map_structure, structure_to_hash_table,
730 GST_OBJECT_UNLOCK (rtx);
732 case PROP_MAX_SIZE_TIME:
733 GST_OBJECT_LOCK (rtx);
734 rtx->max_size_time = g_value_get_uint (value);
735 GST_OBJECT_UNLOCK (rtx);
737 case PROP_MAX_SIZE_PACKETS:
738 GST_OBJECT_LOCK (rtx);
739 rtx->max_size_packets = g_value_get_uint (value);
740 GST_OBJECT_UNLOCK (rtx);
743 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
748 static GstStateChangeReturn
749 gst_rtp_rtx_send_change_state (GstElement * element, GstStateChange transition)
751 GstStateChangeReturn ret;
754 rtx = GST_RTP_RTX_SEND (element);
756 switch (transition) {
762 GST_ELEMENT_CLASS (gst_rtp_rtx_send_parent_class)->change_state (element,
765 switch (transition) {
766 case GST_STATE_CHANGE_PAUSED_TO_READY:
767 gst_rtp_rtx_send_reset (rtx, TRUE);
777 gst_rtp_rtx_send_plugin_init (GstPlugin * plugin)
779 GST_DEBUG_CATEGORY_INIT (gst_rtp_rtx_send_debug, "rtprtxsend", 0,
780 "rtp retransmission sender");
782 return gst_element_register (plugin, "rtprtxsend", GST_RANK_NONE,
783 GST_TYPE_RTP_RTX_SEND);