1 /* GStreamer aggregator base class
2 * Copyright (C) 2014 Mathieu Duponchelle <mathieu.duponchelle@opencreed.com>
3 * Copyright (C) 2014 Thibault Saunier <tsaunier@gnome.org>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
23 * SECTION: gstaggregator
24 * @title: GstAggregator
25 * @short_description: manages a set of pads with the purpose of
26 * aggregating their buffers.
27 * @see_also: gstcollectpads for historical reasons.
29 * Manages a set of pads with the purpose of aggregating their buffers.
30 * Control is given to the subclass when all pads have data.
32 * * Base class for mixers and muxers. Subclasses should at least implement
33 * the #GstAggregatorClass.aggregate() virtual method.
35 * * When data is queued on all pads, tha aggregate vmethod is called.
37 * * One can peek at the data on any given GstAggregatorPad with the
38 * gst_aggregator_pad_get_buffer () method, and take ownership of it
39 * with the gst_aggregator_pad_steal_buffer () method. When a buffer
40 * has been taken with steal_buffer (), a new buffer can be queued
43 * * If the subclass wishes to push a buffer downstream in its aggregate
44 * implementation, it should do so through the
45 * gst_aggregator_finish_buffer () method. This method will take care
46 * of sending and ordering mandatory events such as stream start, caps
49 * * Same goes for EOS events, which should not be pushed directly by the
50 * subclass, it should instead return GST_FLOW_EOS in its aggregate
53 * * Note that the aggregator logic regarding gap event handling is to turn
54 * these into gap buffers with matching PTS and duration. It will also
55 * flag these buffers with GST_BUFFER_FLAG_GAP and GST_BUFFER_FLAG_DROPPABLE
56 * to ease their identification and subsequent processing.
64 #include <string.h> /* strlen */
66 #include "gstaggregator.h"
70 GST_AGGREGATOR_START_TIME_SELECTION_ZERO,
71 GST_AGGREGATOR_START_TIME_SELECTION_FIRST,
72 GST_AGGREGATOR_START_TIME_SELECTION_SET
73 } GstAggregatorStartTimeSelection;
76 gst_aggregator_start_time_selection_get_type (void)
78 static GType gtype = 0;
81 static const GEnumValue values[] = {
82 {GST_AGGREGATOR_START_TIME_SELECTION_ZERO,
83 "Start at 0 running time (default)", "zero"},
84 {GST_AGGREGATOR_START_TIME_SELECTION_FIRST,
85 "Start at first observed input running time", "first"},
86 {GST_AGGREGATOR_START_TIME_SELECTION_SET,
87 "Set start time with start-time property", "set"},
91 gtype = g_enum_register_static ("GstAggregatorStartTimeSelection", values);
96 /* Might become API */
97 static void gst_aggregator_merge_tags (GstAggregator * aggregator,
98 const GstTagList * tags, GstTagMergeMode mode);
99 static void gst_aggregator_set_latency_property (GstAggregator * agg,
101 static gint64 gst_aggregator_get_latency_property (GstAggregator * agg);
104 /* Locking order, locks in this element must always be taken in this order
106 * standard sink pad stream lock -> GST_PAD_STREAM_LOCK (aggpad)
107 * Aggregator pad flush lock -> PAD_FLUSH_LOCK(aggpad)
108 * standard src pad stream lock -> GST_PAD_STREAM_LOCK (srcpad)
109 * Aggregator src lock -> SRC_LOCK(agg) w/ SRC_WAIT/BROADCAST
110 * standard element object lock -> GST_OBJECT_LOCK(agg)
111 * Aggregator pad lock -> PAD_LOCK (aggpad) w/ PAD_WAIT/BROADCAST_EVENT(aggpad)
112 * standard src pad object lock -> GST_OBJECT_LOCK(srcpad)
113 * standard sink pad object lock -> GST_OBJECT_LOCK(aggpad)
117 static GstClockTime gst_aggregator_get_latency_unlocked (GstAggregator * self);
119 GST_DEBUG_CATEGORY_STATIC (aggregator_debug);
120 #define GST_CAT_DEFAULT aggregator_debug
122 /* GstAggregatorPad definitions */
123 #define PAD_LOCK(pad) G_STMT_START { \
124 GST_TRACE_OBJECT (pad, "Taking PAD lock from thread %p", \
126 g_mutex_lock(&pad->priv->lock); \
127 GST_TRACE_OBJECT (pad, "Took PAD lock from thread %p", \
131 #define PAD_UNLOCK(pad) G_STMT_START { \
132 GST_TRACE_OBJECT (pad, "Releasing PAD lock from thread %p", \
134 g_mutex_unlock(&pad->priv->lock); \
135 GST_TRACE_OBJECT (pad, "Release PAD lock from thread %p", \
140 #define PAD_WAIT_EVENT(pad) G_STMT_START { \
141 GST_LOG_OBJECT (pad, "Waiting for buffer to be consumed thread %p", \
143 g_cond_wait(&(((GstAggregatorPad* )pad)->priv->event_cond), \
144 (&((GstAggregatorPad*)pad)->priv->lock)); \
145 GST_LOG_OBJECT (pad, "DONE Waiting for buffer to be consumed on thread %p", \
149 #define PAD_BROADCAST_EVENT(pad) G_STMT_START { \
150 GST_LOG_OBJECT (pad, "Signaling buffer consumed from thread %p", \
152 g_cond_broadcast(&(((GstAggregatorPad* )pad)->priv->event_cond)); \
156 #define PAD_FLUSH_LOCK(pad) G_STMT_START { \
157 GST_TRACE_OBJECT (pad, "Taking lock from thread %p", \
159 g_mutex_lock(&pad->priv->flush_lock); \
160 GST_TRACE_OBJECT (pad, "Took lock from thread %p", \
164 #define PAD_FLUSH_UNLOCK(pad) G_STMT_START { \
165 GST_TRACE_OBJECT (pad, "Releasing lock from thread %p", \
167 g_mutex_unlock(&pad->priv->flush_lock); \
168 GST_TRACE_OBJECT (pad, "Release lock from thread %p", \
172 #define SRC_LOCK(self) G_STMT_START { \
173 GST_TRACE_OBJECT (self, "Taking src lock from thread %p", \
175 g_mutex_lock(&self->priv->src_lock); \
176 GST_TRACE_OBJECT (self, "Took src lock from thread %p", \
180 #define SRC_UNLOCK(self) G_STMT_START { \
181 GST_TRACE_OBJECT (self, "Releasing src lock from thread %p", \
183 g_mutex_unlock(&self->priv->src_lock); \
184 GST_TRACE_OBJECT (self, "Released src lock from thread %p", \
188 #define SRC_WAIT(self) G_STMT_START { \
189 GST_LOG_OBJECT (self, "Waiting for src on thread %p", \
191 g_cond_wait(&(self->priv->src_cond), &(self->priv->src_lock)); \
192 GST_LOG_OBJECT (self, "DONE Waiting for src on thread %p", \
196 #define SRC_BROADCAST(self) G_STMT_START { \
197 GST_LOG_OBJECT (self, "Signaling src from thread %p", \
199 if (self->priv->aggregate_id) \
200 gst_clock_id_unschedule (self->priv->aggregate_id); \
201 g_cond_broadcast(&(self->priv->src_cond)); \
204 struct _GstAggregatorPadPrivate
206 /* Following fields are protected by the PAD_LOCK */
207 GstFlowReturn flow_return;
208 gboolean pending_flush_start;
209 gboolean pending_flush_stop;
210 gboolean pending_eos;
212 gboolean first_buffer;
216 GstClockTime head_position;
217 GstClockTime tail_position;
218 GstClockTime head_time;
219 GstClockTime tail_time;
220 GstClockTime time_level;
226 /* This lock prevents a flush start processing happening while
227 * the chain function is also happening.
232 /* Must be called with PAD_LOCK held */
234 gst_aggregator_pad_reset_unlocked (GstAggregatorPad * aggpad)
236 aggpad->priv->pending_eos = FALSE;
237 aggpad->priv->eos = FALSE;
238 aggpad->priv->flow_return = GST_FLOW_OK;
239 GST_OBJECT_LOCK (aggpad);
240 gst_segment_init (&aggpad->segment, GST_FORMAT_UNDEFINED);
241 gst_segment_init (&aggpad->clip_segment, GST_FORMAT_UNDEFINED);
242 GST_OBJECT_UNLOCK (aggpad);
243 aggpad->priv->head_position = GST_CLOCK_TIME_NONE;
244 aggpad->priv->tail_position = GST_CLOCK_TIME_NONE;
245 aggpad->priv->head_time = GST_CLOCK_TIME_NONE;
246 aggpad->priv->tail_time = GST_CLOCK_TIME_NONE;
247 aggpad->priv->time_level = 0;
251 gst_aggregator_pad_flush (GstAggregatorPad * aggpad, GstAggregator * agg)
253 GstAggregatorPadClass *klass = GST_AGGREGATOR_PAD_GET_CLASS (aggpad);
256 gst_aggregator_pad_reset_unlocked (aggpad);
260 return klass->flush (aggpad, agg);
265 /*************************************
266 * GstAggregator implementation *
267 *************************************/
268 static GstElementClass *aggregator_parent_class = NULL;
270 /* All members are protected by the object lock unless otherwise noted */
272 struct _GstAggregatorPrivate
276 /* Our state is >= PAUSED */
277 gboolean running; /* protected by src_lock */
280 gboolean send_stream_start; /* protected by srcpad stream lock */
281 gboolean send_segment;
282 gboolean flush_seeking;
283 gboolean pending_flush_start;
284 gboolean send_eos; /* protected by srcpad stream lock */
286 GstCaps *srccaps; /* protected by the srcpad stream lock */
289 gboolean tags_changed;
291 gboolean peer_latency_live; /* protected by src_lock */
292 GstClockTime peer_latency_min; /* protected by src_lock */
293 GstClockTime peer_latency_max; /* protected by src_lock */
294 gboolean has_peer_latency; /* protected by src_lock */
296 GstClockTime sub_latency_min; /* protected by src_lock */
297 GstClockTime sub_latency_max; /* protected by src_lock */
300 GstClockID aggregate_id; /* protected by src_lock */
304 gboolean first_buffer; /* protected by object lock */
305 GstAggregatorStartTimeSelection start_time_selection;
306 GstClockTime start_time;
309 gint64 latency; /* protected by both src_lock and all pad locks */
317 gboolean only_to_active_pads;
319 gboolean one_actually_seeked;
322 #define DEFAULT_LATENCY 0
323 #define DEFAULT_START_TIME_SELECTION GST_AGGREGATOR_START_TIME_SELECTION_ZERO
324 #define DEFAULT_START_TIME (-1)
330 PROP_START_TIME_SELECTION,
335 static GstFlowReturn gst_aggregator_pad_chain_internal (GstAggregator * self,
336 GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head);
339 * gst_aggregator_iterate_sinkpads:
340 * @self: The #GstAggregator
341 * @func: (scope call): The function to call.
342 * @user_data: (closure): The data to pass to @func.
344 * Iterate the sinkpads of aggregator to call a function on them.
346 * This method guarantees that @func will be called only once for each
350 gst_aggregator_iterate_sinkpads (GstAggregator * self,
351 GstAggregatorPadForeachFunc func, gpointer user_data)
353 gboolean result = FALSE;
355 gboolean done = FALSE;
356 GValue item = { 0, };
357 GList *seen_pads = NULL;
359 iter = gst_element_iterate_sink_pads (GST_ELEMENT (self));
365 switch (gst_iterator_next (iter, &item)) {
366 case GST_ITERATOR_OK:
368 GstAggregatorPad *pad;
370 pad = g_value_get_object (&item);
372 /* if already pushed, skip. FIXME, find something faster to tag pads */
373 if (pad == NULL || g_list_find (seen_pads, pad)) {
374 g_value_reset (&item);
378 GST_LOG_OBJECT (pad, "calling function %s on pad",
379 GST_DEBUG_FUNCPTR_NAME (func));
381 result = func (self, pad, user_data);
385 seen_pads = g_list_prepend (seen_pads, pad);
387 g_value_reset (&item);
390 case GST_ITERATOR_RESYNC:
391 gst_iterator_resync (iter);
393 case GST_ITERATOR_ERROR:
394 GST_ERROR_OBJECT (self,
395 "Could not iterate over internally linked pads");
398 case GST_ITERATOR_DONE:
403 g_value_unset (&item);
404 gst_iterator_free (iter);
406 if (seen_pads == NULL) {
407 GST_DEBUG_OBJECT (self, "No pad seen");
411 g_list_free (seen_pads);
418 gst_aggregator_pad_queue_is_empty (GstAggregatorPad * pad)
420 return (g_queue_peek_tail (&pad->priv->buffers) == NULL);
424 gst_aggregator_check_pads_ready (GstAggregator * self)
426 GstAggregatorPad *pad;
428 gboolean have_data = TRUE;
430 GST_LOG_OBJECT (self, "checking pads");
432 GST_OBJECT_LOCK (self);
434 sinkpads = GST_ELEMENT_CAST (self)->sinkpads;
435 if (sinkpads == NULL)
438 for (l = sinkpads; l != NULL; l = l->next) {
443 if (gst_aggregator_pad_queue_is_empty (pad)) {
444 if (!pad->priv->eos) {
447 /* If not live we need data on all pads, so leave the loop */
448 if (!self->priv->peer_latency_live) {
453 } else if (self->priv->peer_latency_live) {
454 /* In live mode, having a single pad with buffers is enough to
455 * generate a start time from it. In non-live mode all pads need
458 self->priv->first_buffer = FALSE;
467 self->priv->first_buffer = FALSE;
469 GST_OBJECT_UNLOCK (self);
470 GST_LOG_OBJECT (self, "pads are ready");
475 GST_LOG_OBJECT (self, "pads not ready: no sink pads");
476 GST_OBJECT_UNLOCK (self);
481 GST_LOG_OBJECT (pad, "pad not ready to be aggregated yet");
482 GST_OBJECT_UNLOCK (self);
488 gst_aggregator_reset_flow_values (GstAggregator * self)
490 GST_OBJECT_LOCK (self);
491 self->priv->send_stream_start = TRUE;
492 self->priv->send_segment = TRUE;
493 gst_segment_init (&self->segment, GST_FORMAT_TIME);
494 self->priv->first_buffer = TRUE;
495 GST_OBJECT_UNLOCK (self);
499 gst_aggregator_push_mandatory_events (GstAggregator * self)
501 GstAggregatorPrivate *priv = self->priv;
502 GstEvent *segment = NULL;
503 GstEvent *tags = NULL;
505 if (self->priv->send_stream_start) {
508 GST_INFO_OBJECT (self, "pushing stream start");
509 /* stream-start (FIXME: create id based on input ids) */
510 g_snprintf (s_id, sizeof (s_id), "agg-%08x", g_random_int ());
511 if (!gst_pad_push_event (self->srcpad, gst_event_new_stream_start (s_id))) {
512 GST_WARNING_OBJECT (self->srcpad, "Sending stream start event failed");
514 self->priv->send_stream_start = FALSE;
517 if (self->priv->srccaps) {
519 GST_INFO_OBJECT (self, "pushing caps: %" GST_PTR_FORMAT,
520 self->priv->srccaps);
521 if (!gst_pad_push_event (self->srcpad,
522 gst_event_new_caps (self->priv->srccaps))) {
523 GST_WARNING_OBJECT (self->srcpad, "Sending caps event failed");
525 gst_caps_unref (self->priv->srccaps);
526 self->priv->srccaps = NULL;
529 GST_OBJECT_LOCK (self);
530 if (self->priv->send_segment && !self->priv->flush_seeking) {
531 segment = gst_event_new_segment (&self->segment);
533 if (!self->priv->seqnum)
534 self->priv->seqnum = gst_event_get_seqnum (segment);
536 gst_event_set_seqnum (segment, self->priv->seqnum);
537 self->priv->send_segment = FALSE;
539 GST_DEBUG_OBJECT (self, "pushing segment %" GST_PTR_FORMAT, segment);
542 if (priv->tags && priv->tags_changed && !self->priv->flush_seeking) {
543 tags = gst_event_new_tag (gst_tag_list_ref (priv->tags));
544 priv->tags_changed = FALSE;
546 GST_OBJECT_UNLOCK (self);
549 gst_pad_push_event (self->srcpad, segment);
551 gst_pad_push_event (self->srcpad, tags);
556 * gst_aggregator_set_src_caps:
557 * @self: The #GstAggregator
558 * @caps: The #GstCaps to set on the src pad.
560 * Sets the caps to be used on the src pad.
563 gst_aggregator_set_src_caps (GstAggregator * self, GstCaps * caps)
565 GST_PAD_STREAM_LOCK (self->srcpad);
566 gst_caps_replace (&self->priv->srccaps, caps);
567 gst_aggregator_push_mandatory_events (self);
568 GST_PAD_STREAM_UNLOCK (self->srcpad);
572 * gst_aggregator_finish_buffer:
573 * @self: The #GstAggregator
574 * @buffer: (transfer full): the #GstBuffer to push.
576 * This method will push the provided output buffer downstream. If needed,
577 * mandatory events such as stream-start, caps, and segment events will be
578 * sent before pushing the buffer.
581 gst_aggregator_finish_buffer (GstAggregator * self, GstBuffer * buffer)
583 gst_aggregator_push_mandatory_events (self);
585 GST_OBJECT_LOCK (self);
586 if (!self->priv->flush_seeking && gst_pad_is_active (self->srcpad)) {
587 GST_TRACE_OBJECT (self, "pushing buffer %" GST_PTR_FORMAT, buffer);
588 GST_OBJECT_UNLOCK (self);
589 return gst_pad_push (self->srcpad, buffer);
591 GST_INFO_OBJECT (self, "Not pushing (active: %i, flushing: %i)",
592 self->priv->flush_seeking, gst_pad_is_active (self->srcpad));
593 GST_OBJECT_UNLOCK (self);
594 gst_buffer_unref (buffer);
600 gst_aggregator_push_eos (GstAggregator * self)
603 gst_aggregator_push_mandatory_events (self);
605 event = gst_event_new_eos ();
607 GST_OBJECT_LOCK (self);
608 self->priv->send_eos = FALSE;
609 gst_event_set_seqnum (event, self->priv->seqnum);
610 GST_OBJECT_UNLOCK (self);
612 gst_pad_push_event (self->srcpad, event);
616 gst_aggregator_get_next_time (GstAggregator * self)
618 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
620 if (klass->get_next_time)
621 return klass->get_next_time (self);
623 return GST_CLOCK_TIME_NONE;
627 gst_aggregator_wait_and_check (GstAggregator * self, gboolean * timeout)
629 GstClockTime latency;
637 latency = gst_aggregator_get_latency_unlocked (self);
639 if (gst_aggregator_check_pads_ready (self)) {
640 GST_DEBUG_OBJECT (self, "all pads have data");
646 /* Before waiting, check if we're actually still running */
647 if (!self->priv->running || !self->priv->send_eos) {
653 start = gst_aggregator_get_next_time (self);
655 /* If we're not live, or if we use the running time
656 * of the first buffer as start time, we wait until
657 * all pads have buffers.
658 * Otherwise (i.e. if we are live!), we wait on the clock
659 * and if a pad does not have a buffer in time we ignore
662 GST_OBJECT_LOCK (self);
663 if (!GST_CLOCK_TIME_IS_VALID (latency) ||
664 !GST_IS_CLOCK (GST_ELEMENT_CLOCK (self)) ||
665 !GST_CLOCK_TIME_IS_VALID (start) ||
666 (self->priv->first_buffer
667 && self->priv->start_time_selection ==
668 GST_AGGREGATOR_START_TIME_SELECTION_FIRST)) {
669 /* We wake up here when something happened, and below
670 * then check if we're ready now. If we return FALSE,
671 * we will be directly called again.
673 GST_OBJECT_UNLOCK (self);
676 GstClockTime base_time, time;
678 GstClockReturn status;
679 GstClockTimeDiff jitter;
681 GST_DEBUG_OBJECT (self, "got subclass start time: %" GST_TIME_FORMAT,
682 GST_TIME_ARGS (start));
684 base_time = GST_ELEMENT_CAST (self)->base_time;
685 clock = gst_object_ref (GST_ELEMENT_CLOCK (self));
686 GST_OBJECT_UNLOCK (self);
688 time = base_time + start;
691 GST_DEBUG_OBJECT (self, "possibly waiting for clock to reach %"
692 GST_TIME_FORMAT " (base %" GST_TIME_FORMAT " start %" GST_TIME_FORMAT
693 " latency %" GST_TIME_FORMAT " current %" GST_TIME_FORMAT ")",
694 GST_TIME_ARGS (time),
695 GST_TIME_ARGS (base_time),
696 GST_TIME_ARGS (start), GST_TIME_ARGS (latency),
697 GST_TIME_ARGS (gst_clock_get_time (clock)));
699 self->priv->aggregate_id = gst_clock_new_single_shot_id (clock, time);
700 gst_object_unref (clock);
704 status = gst_clock_id_wait (self->priv->aggregate_id, &jitter);
707 if (self->priv->aggregate_id) {
708 gst_clock_id_unref (self->priv->aggregate_id);
709 self->priv->aggregate_id = NULL;
712 GST_DEBUG_OBJECT (self,
713 "clock returned %d (jitter: %" GST_STIME_FORMAT ")",
714 status, GST_STIME_ARGS (jitter));
717 if (status == GST_CLOCK_OK || status == GST_CLOCK_EARLY) {
724 res = gst_aggregator_check_pads_ready (self);
731 check_events (GstAggregator * self, GstAggregatorPad * pad, gpointer user_data)
733 GstEvent *event = NULL;
734 GstAggregatorClass *klass = NULL;
735 gboolean *processed_event = user_data;
741 if (gst_aggregator_pad_queue_is_empty (pad) && pad->priv->pending_eos) {
742 pad->priv->pending_eos = FALSE;
743 pad->priv->eos = TRUE;
745 if (GST_IS_EVENT (g_queue_peek_tail (&pad->priv->buffers))) {
746 event = g_queue_pop_tail (&pad->priv->buffers);
747 PAD_BROADCAST_EVENT (pad);
752 *processed_event = TRUE;
754 klass = GST_AGGREGATOR_GET_CLASS (self);
756 GST_LOG_OBJECT (pad, "Processing %" GST_PTR_FORMAT, event);
757 klass->sink_event (self, pad, event);
759 } while (event != NULL);
765 gst_aggregator_pad_set_flushing (GstAggregatorPad * aggpad,
766 GstFlowReturn flow_return, gboolean full)
771 if (flow_return == GST_FLOW_NOT_LINKED)
772 aggpad->priv->flow_return = MIN (flow_return, aggpad->priv->flow_return);
774 aggpad->priv->flow_return = flow_return;
776 item = g_queue_peek_head_link (&aggpad->priv->buffers);
778 GList *next = item->next;
780 /* In partial flush, we do like the pad, we get rid of non-sticky events
783 if (full || GST_IS_BUFFER (item->data) ||
784 GST_EVENT_TYPE (item->data) == GST_EVENT_EOS ||
785 GST_EVENT_TYPE (item->data) == GST_EVENT_SEGMENT ||
786 !GST_EVENT_IS_STICKY (item->data)) {
787 gst_mini_object_unref (item->data);
788 g_queue_delete_link (&aggpad->priv->buffers, item);
792 aggpad->priv->num_buffers = 0;
794 PAD_BROADCAST_EVENT (aggpad);
799 gst_aggregator_aggregate_func (GstAggregator * self)
801 GstAggregatorPrivate *priv = self->priv;
802 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
803 gboolean timeout = FALSE;
805 if (self->priv->running == FALSE) {
806 GST_DEBUG_OBJECT (self, "Not running anymore");
810 GST_LOG_OBJECT (self, "Checking aggregate");
811 while (priv->send_eos && priv->running) {
812 GstFlowReturn flow_return;
813 gboolean processed_event = FALSE;
815 gst_aggregator_iterate_sinkpads (self, check_events, NULL);
817 if (!gst_aggregator_wait_and_check (self, &timeout))
820 gst_aggregator_iterate_sinkpads (self, check_events, &processed_event);
824 GST_TRACE_OBJECT (self, "Actually aggregating!");
825 flow_return = klass->aggregate (self, timeout);
827 GST_OBJECT_LOCK (self);
828 if (flow_return == GST_FLOW_FLUSHING && priv->flush_seeking) {
829 /* We don't want to set the pads to flushing, but we want to
830 * stop the thread, so just break here */
831 GST_OBJECT_UNLOCK (self);
834 GST_OBJECT_UNLOCK (self);
836 if (flow_return == GST_FLOW_EOS || flow_return == GST_FLOW_ERROR) {
837 gst_aggregator_push_eos (self);
840 GST_LOG_OBJECT (self, "flow return is %s", gst_flow_get_name (flow_return));
842 if (flow_return != GST_FLOW_OK) {
845 GST_OBJECT_LOCK (self);
846 for (item = GST_ELEMENT (self)->sinkpads; item; item = item->next) {
847 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
849 gst_aggregator_pad_set_flushing (aggpad, flow_return, TRUE);
851 GST_OBJECT_UNLOCK (self);
856 /* Pause the task here, the only ways to get here are:
857 * 1) We're stopping, in which case the task is stopped anyway
858 * 2) We got a flow error above, in which case it might take
859 * some time to forward the flow return upstream and we
860 * would otherwise call the task function over and over
861 * again without doing anything
863 gst_pad_pause_task (self->srcpad);
867 gst_aggregator_start (GstAggregator * self)
869 GstAggregatorClass *klass;
872 self->priv->send_stream_start = TRUE;
873 self->priv->send_segment = TRUE;
874 self->priv->send_eos = TRUE;
875 self->priv->srccaps = NULL;
877 klass = GST_AGGREGATOR_GET_CLASS (self);
880 result = klass->start (self);
888 _check_pending_flush_stop (GstAggregatorPad * pad)
893 res = (!pad->priv->pending_flush_stop && !pad->priv->pending_flush_start);
900 gst_aggregator_stop_srcpad_task (GstAggregator * self, GstEvent * flush_start)
904 GST_INFO_OBJECT (self, "%s srcpad task",
905 flush_start ? "Pausing" : "Stopping");
908 self->priv->running = FALSE;
909 SRC_BROADCAST (self);
913 res = gst_pad_push_event (self->srcpad, flush_start);
916 gst_pad_stop_task (self->srcpad);
922 gst_aggregator_start_srcpad_task (GstAggregator * self)
924 GST_INFO_OBJECT (self, "Starting srcpad task");
926 self->priv->running = TRUE;
927 gst_pad_start_task (GST_PAD (self->srcpad),
928 (GstTaskFunction) gst_aggregator_aggregate_func, self, NULL);
932 gst_aggregator_flush (GstAggregator * self)
934 GstFlowReturn ret = GST_FLOW_OK;
935 GstAggregatorPrivate *priv = self->priv;
936 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
938 GST_DEBUG_OBJECT (self, "Flushing everything");
939 GST_OBJECT_LOCK (self);
940 priv->send_segment = TRUE;
941 priv->flush_seeking = FALSE;
942 priv->tags_changed = FALSE;
943 GST_OBJECT_UNLOCK (self);
945 ret = klass->flush (self);
951 /* Called with GstAggregator's object lock held */
954 gst_aggregator_all_flush_stop_received_locked (GstAggregator * self)
957 GstAggregatorPad *tmppad;
959 for (tmp = GST_ELEMENT (self)->sinkpads; tmp; tmp = tmp->next) {
960 tmppad = (GstAggregatorPad *) tmp->data;
962 if (_check_pending_flush_stop (tmppad) == FALSE) {
963 GST_DEBUG_OBJECT (tmppad, "Is not last %i -- %i",
964 tmppad->priv->pending_flush_start, tmppad->priv->pending_flush_stop);
973 gst_aggregator_flush_start (GstAggregator * self, GstAggregatorPad * aggpad,
976 GstAggregatorPrivate *priv = self->priv;
977 GstAggregatorPadPrivate *padpriv = aggpad->priv;
979 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, FALSE);
981 PAD_FLUSH_LOCK (aggpad);
983 if (padpriv->pending_flush_start) {
984 GST_DEBUG_OBJECT (aggpad, "Expecting FLUSH_STOP now");
986 padpriv->pending_flush_start = FALSE;
987 padpriv->pending_flush_stop = TRUE;
991 GST_OBJECT_LOCK (self);
992 if (priv->flush_seeking) {
993 /* If flush_seeking we forward the first FLUSH_START */
994 if (priv->pending_flush_start) {
995 priv->pending_flush_start = FALSE;
996 GST_OBJECT_UNLOCK (self);
998 GST_INFO_OBJECT (self, "Flushing, pausing srcpad task");
999 gst_aggregator_stop_srcpad_task (self, event);
1001 GST_INFO_OBJECT (self, "Getting STREAM_LOCK while seeking");
1002 GST_PAD_STREAM_LOCK (self->srcpad);
1003 GST_LOG_OBJECT (self, "GOT STREAM_LOCK");
1006 GST_OBJECT_UNLOCK (self);
1007 gst_event_unref (event);
1010 GST_OBJECT_UNLOCK (self);
1011 gst_event_unref (event);
1013 PAD_FLUSH_UNLOCK (aggpad);
1016 /* Must be called with the the PAD_LOCK held */
1018 update_time_level (GstAggregatorPad * aggpad, gboolean head)
1021 if (GST_CLOCK_TIME_IS_VALID (aggpad->priv->head_position) &&
1022 aggpad->clip_segment.format == GST_FORMAT_TIME)
1023 aggpad->priv->head_time =
1024 gst_segment_to_running_time (&aggpad->clip_segment,
1025 GST_FORMAT_TIME, aggpad->priv->head_position);
1027 aggpad->priv->head_time = GST_CLOCK_TIME_NONE;
1029 if (GST_CLOCK_TIME_IS_VALID (aggpad->priv->tail_position) &&
1030 aggpad->segment.format == GST_FORMAT_TIME)
1031 aggpad->priv->tail_time =
1032 gst_segment_to_running_time (&aggpad->segment,
1033 GST_FORMAT_TIME, aggpad->priv->tail_position);
1035 aggpad->priv->tail_time = aggpad->priv->head_time;
1038 if (aggpad->priv->head_time == GST_CLOCK_TIME_NONE ||
1039 aggpad->priv->tail_time == GST_CLOCK_TIME_NONE) {
1040 aggpad->priv->time_level = 0;
1044 if (aggpad->priv->tail_time > aggpad->priv->head_time)
1045 aggpad->priv->time_level = 0;
1047 aggpad->priv->time_level = aggpad->priv->head_time -
1048 aggpad->priv->tail_time;
1052 /* GstAggregator vmethods default implementations */
1054 gst_aggregator_default_sink_event (GstAggregator * self,
1055 GstAggregatorPad * aggpad, GstEvent * event)
1057 gboolean res = TRUE;
1058 GstPad *pad = GST_PAD (aggpad);
1059 GstAggregatorPrivate *priv = self->priv;
1061 switch (GST_EVENT_TYPE (event)) {
1062 case GST_EVENT_FLUSH_START:
1064 gst_aggregator_flush_start (self, aggpad, event);
1065 /* We forward only in one case: right after flush_seeking */
1069 case GST_EVENT_FLUSH_STOP:
1071 GST_DEBUG_OBJECT (aggpad, "Got FLUSH_STOP");
1073 gst_aggregator_pad_flush (aggpad, self);
1074 GST_OBJECT_LOCK (self);
1075 if (priv->flush_seeking) {
1076 g_atomic_int_set (&aggpad->priv->pending_flush_stop, FALSE);
1077 if (gst_aggregator_all_flush_stop_received_locked (self)) {
1078 GST_OBJECT_UNLOCK (self);
1079 /* That means we received FLUSH_STOP/FLUSH_STOP on
1080 * all sinkpads -- Seeking is Done... sending FLUSH_STOP */
1081 gst_aggregator_flush (self);
1082 gst_pad_push_event (self->srcpad, event);
1085 priv->send_eos = TRUE;
1086 SRC_BROADCAST (self);
1089 GST_INFO_OBJECT (self, "Releasing source pad STREAM_LOCK");
1090 GST_PAD_STREAM_UNLOCK (self->srcpad);
1091 gst_aggregator_start_srcpad_task (self);
1093 GST_OBJECT_UNLOCK (self);
1096 GST_OBJECT_UNLOCK (self);
1099 aggpad->priv->first_buffer = TRUE;
1101 /* We never forward the event */
1106 GST_DEBUG_OBJECT (aggpad, "EOS");
1108 /* We still have a buffer, and we don't want the subclass to have to
1109 * check for it. Mark pending_eos, eos will be set when steal_buffer is
1114 if (gst_aggregator_pad_queue_is_empty (aggpad)) {
1115 aggpad->priv->eos = TRUE;
1117 aggpad->priv->pending_eos = TRUE;
1119 PAD_UNLOCK (aggpad);
1121 SRC_BROADCAST (self);
1125 case GST_EVENT_SEGMENT:
1128 GST_OBJECT_LOCK (aggpad);
1129 gst_event_copy_segment (event, &aggpad->segment);
1130 update_time_level (aggpad, FALSE);
1131 GST_OBJECT_UNLOCK (aggpad);
1132 PAD_UNLOCK (aggpad);
1134 GST_OBJECT_LOCK (self);
1135 self->priv->seqnum = gst_event_get_seqnum (event);
1136 GST_OBJECT_UNLOCK (self);
1139 case GST_EVENT_STREAM_START:
1145 GstClockTime pts, endpts;
1146 GstClockTime duration;
1149 gst_event_parse_gap (event, &pts, &duration);
1150 gapbuf = gst_buffer_new ();
1152 if (GST_CLOCK_TIME_IS_VALID (duration))
1153 endpts = pts + duration;
1155 endpts = GST_CLOCK_TIME_NONE;
1157 GST_OBJECT_LOCK (aggpad);
1158 res = gst_segment_clip (&aggpad->segment, GST_FORMAT_TIME, pts, endpts,
1160 GST_OBJECT_UNLOCK (aggpad);
1163 GST_WARNING_OBJECT (self, "GAP event outside segment, dropping");
1167 if (GST_CLOCK_TIME_IS_VALID (endpts) && GST_CLOCK_TIME_IS_VALID (pts))
1168 duration = endpts - pts;
1170 duration = GST_CLOCK_TIME_NONE;
1172 GST_BUFFER_PTS (gapbuf) = pts;
1173 GST_BUFFER_DURATION (gapbuf) = duration;
1174 GST_BUFFER_FLAG_SET (gapbuf, GST_BUFFER_FLAG_GAP);
1175 GST_BUFFER_FLAG_SET (gapbuf, GST_BUFFER_FLAG_DROPPABLE);
1177 if (gst_aggregator_pad_chain_internal (self, aggpad, gapbuf, FALSE) !=
1179 GST_WARNING_OBJECT (self, "Failed to chain gap buffer");
1189 gst_event_parse_tag (event, &tags);
1191 if (gst_tag_list_get_scope (tags) == GST_TAG_SCOPE_STREAM) {
1192 gst_aggregator_merge_tags (self, tags, GST_TAG_MERGE_REPLACE);
1193 gst_event_unref (event);
1205 GST_DEBUG_OBJECT (pad, "Forwarding event: %" GST_PTR_FORMAT, event);
1206 return gst_pad_event_default (pad, GST_OBJECT (self), event);
1209 GST_DEBUG_OBJECT (pad, "Eating event: %" GST_PTR_FORMAT, event);
1211 gst_event_unref (event);
1216 static inline gboolean
1217 gst_aggregator_stop_pad (GstAggregator * self, GstAggregatorPad * pad,
1218 gpointer unused_udata)
1220 gst_aggregator_pad_flush (pad, self);
1226 gst_aggregator_stop (GstAggregator * agg)
1228 GstAggregatorClass *klass;
1231 gst_aggregator_reset_flow_values (agg);
1233 gst_aggregator_iterate_sinkpads (agg, gst_aggregator_stop_pad, NULL);
1235 klass = GST_AGGREGATOR_GET_CLASS (agg);
1238 result = klass->stop (agg);
1242 agg->priv->has_peer_latency = FALSE;
1243 agg->priv->peer_latency_live = FALSE;
1244 agg->priv->peer_latency_min = agg->priv->peer_latency_max = FALSE;
1246 if (agg->priv->tags)
1247 gst_tag_list_unref (agg->priv->tags);
1248 agg->priv->tags = NULL;
1253 /* GstElement vmethods implementations */
1254 static GstStateChangeReturn
1255 gst_aggregator_change_state (GstElement * element, GstStateChange transition)
1257 GstStateChangeReturn ret;
1258 GstAggregator *self = GST_AGGREGATOR (element);
1260 switch (transition) {
1261 case GST_STATE_CHANGE_READY_TO_PAUSED:
1262 if (!gst_aggregator_start (self))
1270 GST_ELEMENT_CLASS (aggregator_parent_class)->change_state (element,
1271 transition)) == GST_STATE_CHANGE_FAILURE)
1275 switch (transition) {
1276 case GST_STATE_CHANGE_PAUSED_TO_READY:
1277 if (!gst_aggregator_stop (self)) {
1278 /* What to do in this case? Error out? */
1279 GST_ERROR_OBJECT (self, "Subclass failed to stop.");
1291 GST_ERROR_OBJECT (element, "parent failed state change");
1296 GST_ERROR_OBJECT (element, "Subclass failed to start");
1297 return GST_STATE_CHANGE_FAILURE;
1302 gst_aggregator_release_pad (GstElement * element, GstPad * pad)
1304 GstAggregator *self = GST_AGGREGATOR (element);
1305 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1307 GST_INFO_OBJECT (pad, "Removing pad");
1310 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, TRUE);
1311 gst_element_remove_pad (element, pad);
1313 self->priv->has_peer_latency = FALSE;
1314 SRC_BROADCAST (self);
1318 static GstAggregatorPad *
1319 gst_aggregator_default_create_new_pad (GstAggregator * self,
1320 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
1322 GstAggregatorPad *agg_pad;
1323 GstAggregatorPrivate *priv = self->priv;
1327 if (templ->direction != GST_PAD_SINK ||
1328 g_strcmp0 (templ->name_template, "sink_%u") != 0)
1331 GST_OBJECT_LOCK (self);
1332 if (req_name == NULL || strlen (req_name) < 6
1333 || !g_str_has_prefix (req_name, "sink_")) {
1334 /* no name given when requesting the pad, use next available int */
1335 serial = ++priv->max_padserial;
1337 /* parse serial number from requested padname */
1338 serial = g_ascii_strtoull (&req_name[5], NULL, 10);
1339 if (serial > priv->max_padserial)
1340 priv->max_padserial = serial;
1343 name = g_strdup_printf ("sink_%u", serial);
1344 agg_pad = g_object_new (GST_AGGREGATOR_GET_CLASS (self)->sinkpads_type,
1345 "name", name, "direction", GST_PAD_SINK, "template", templ, NULL);
1348 GST_OBJECT_UNLOCK (self);
1355 GST_WARNING_OBJECT (self, "request new pad that is not a SINK pad\n");
1361 gst_aggregator_request_new_pad (GstElement * element,
1362 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
1364 GstAggregator *self;
1365 GstAggregatorPad *agg_pad;
1366 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (element);
1367 GstAggregatorPrivate *priv = GST_AGGREGATOR (element)->priv;
1369 self = GST_AGGREGATOR (element);
1371 agg_pad = klass->create_new_pad (self, templ, req_name, caps);
1373 GST_ERROR_OBJECT (element, "Couldn't create new pad");
1377 GST_DEBUG_OBJECT (element, "Adding pad %s", GST_PAD_NAME (agg_pad));
1378 self->priv->has_peer_latency = FALSE;
1381 gst_pad_set_active (GST_PAD (agg_pad), TRUE);
1383 /* add the pad to the element */
1384 gst_element_add_pad (element, GST_PAD (agg_pad));
1386 return GST_PAD (agg_pad);
1389 /* Must be called with SRC_LOCK held */
1392 gst_aggregator_query_latency_unlocked (GstAggregator * self, GstQuery * query)
1394 gboolean query_ret, live;
1395 GstClockTime our_latency, min, max;
1397 query_ret = gst_pad_query_default (self->srcpad, GST_OBJECT (self), query);
1400 GST_WARNING_OBJECT (self, "Latency query failed");
1404 gst_query_parse_latency (query, &live, &min, &max);
1406 our_latency = self->priv->latency;
1408 if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (min))) {
1409 GST_ERROR_OBJECT (self, "Invalid minimum latency %" GST_TIME_FORMAT
1410 ". Please file a bug at " PACKAGE_BUGREPORT ".", GST_TIME_ARGS (min));
1414 if (min > max && GST_CLOCK_TIME_IS_VALID (max)) {
1415 GST_ELEMENT_WARNING (self, CORE, CLOCK, (NULL),
1416 ("Impossible to configure latency: max %" GST_TIME_FORMAT " < min %"
1417 GST_TIME_FORMAT ". Add queues or other buffering elements.",
1418 GST_TIME_ARGS (max), GST_TIME_ARGS (min)));
1422 self->priv->peer_latency_live = live;
1423 self->priv->peer_latency_min = min;
1424 self->priv->peer_latency_max = max;
1425 self->priv->has_peer_latency = TRUE;
1429 min += self->priv->sub_latency_min;
1430 if (GST_CLOCK_TIME_IS_VALID (self->priv->sub_latency_max)
1431 && GST_CLOCK_TIME_IS_VALID (max))
1432 max += self->priv->sub_latency_max + our_latency;
1434 max = GST_CLOCK_TIME_NONE;
1436 SRC_BROADCAST (self);
1438 GST_DEBUG_OBJECT (self, "configured latency live:%s min:%" G_GINT64_FORMAT
1439 " max:%" G_GINT64_FORMAT, live ? "true" : "false", min, max);
1441 gst_query_set_latency (query, live, min, max);
1447 * MUST be called with the src_lock held.
1449 * See gst_aggregator_get_latency() for doc
1452 gst_aggregator_get_latency_unlocked (GstAggregator * self)
1454 GstClockTime latency;
1456 g_return_val_if_fail (GST_IS_AGGREGATOR (self), 0);
1458 if (!self->priv->has_peer_latency) {
1459 GstQuery *query = gst_query_new_latency ();
1462 ret = gst_aggregator_query_latency_unlocked (self, query);
1463 gst_query_unref (query);
1465 return GST_CLOCK_TIME_NONE;
1468 if (!self->priv->has_peer_latency || !self->priv->peer_latency_live)
1469 return GST_CLOCK_TIME_NONE;
1471 /* latency_min is never GST_CLOCK_TIME_NONE by construction */
1472 latency = self->priv->peer_latency_min;
1475 latency += self->priv->latency;
1476 latency += self->priv->sub_latency_min;
1482 * gst_aggregator_get_latency:
1483 * @self: a #GstAggregator
1485 * Retrieves the latency values reported by @self in response to the latency
1486 * query, or %GST_CLOCK_TIME_NONE if there is not live source connected and the element
1487 * will not wait for the clock.
1489 * Typically only called by subclasses.
1491 * Returns: The latency or %GST_CLOCK_TIME_NONE if the element does not sync
1494 gst_aggregator_get_latency (GstAggregator * self)
1499 ret = gst_aggregator_get_latency_unlocked (self);
1506 gst_aggregator_send_event (GstElement * element, GstEvent * event)
1508 GstAggregator *self = GST_AGGREGATOR (element);
1510 GST_STATE_LOCK (element);
1511 if (GST_EVENT_TYPE (event) == GST_EVENT_SEEK &&
1512 GST_STATE (element) < GST_STATE_PAUSED) {
1516 GstSeekType start_type, stop_type;
1519 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1520 &start, &stop_type, &stop);
1522 GST_OBJECT_LOCK (self);
1523 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
1524 stop_type, stop, NULL);
1525 self->priv->seqnum = gst_event_get_seqnum (event);
1526 self->priv->first_buffer = FALSE;
1527 GST_OBJECT_UNLOCK (self);
1529 GST_DEBUG_OBJECT (element, "Storing segment %" GST_PTR_FORMAT, event);
1531 GST_STATE_UNLOCK (element);
1534 return GST_ELEMENT_CLASS (aggregator_parent_class)->send_event (element,
1539 gst_aggregator_default_src_query (GstAggregator * self, GstQuery * query)
1541 gboolean res = TRUE;
1543 switch (GST_QUERY_TYPE (query)) {
1544 case GST_QUERY_SEEKING:
1548 /* don't pass it along as some (file)sink might claim it does
1549 * whereas with a collectpads in between that will not likely work */
1550 gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
1551 gst_query_set_seeking (query, format, FALSE, 0, -1);
1556 case GST_QUERY_LATENCY:
1558 res = gst_aggregator_query_latency_unlocked (self, query);
1562 return gst_pad_query_default (self->srcpad, GST_OBJECT (self), query);
1569 gst_aggregator_event_forward_func (GstPad * pad, gpointer user_data)
1571 EventData *evdata = user_data;
1572 gboolean ret = TRUE;
1573 GstPad *peer = gst_pad_get_peer (pad);
1574 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1577 if (evdata->only_to_active_pads && aggpad->priv->first_buffer) {
1578 GST_DEBUG_OBJECT (pad, "not sending event to inactive pad");
1581 ret = gst_pad_send_event (peer, gst_event_ref (evdata->event));
1582 GST_DEBUG_OBJECT (pad, "return of event push is %d", ret);
1583 gst_object_unref (peer);
1588 if (GST_EVENT_TYPE (evdata->event) == GST_EVENT_SEEK) {
1589 GstQuery *seeking = gst_query_new_seeking (GST_FORMAT_TIME);
1591 GST_DEBUG_OBJECT (pad, "Event %" GST_PTR_FORMAT " failed", evdata->event);
1593 if (gst_pad_query (peer, seeking)) {
1596 gst_query_parse_seeking (seeking, NULL, &seekable, NULL, NULL);
1598 if (seekable == FALSE) {
1599 GST_INFO_OBJECT (pad,
1600 "Source not seekable, We failed but it does not matter!");
1605 GST_ERROR_OBJECT (pad, "Query seeking FAILED");
1608 gst_query_unref (seeking);
1611 if (evdata->flush) {
1613 aggpad->priv->pending_flush_start = FALSE;
1614 aggpad->priv->pending_flush_stop = FALSE;
1615 PAD_UNLOCK (aggpad);
1618 evdata->one_actually_seeked = TRUE;
1621 evdata->result &= ret;
1623 /* Always send to all pads */
1628 gst_aggregator_forward_event_to_all_sinkpads (GstAggregator * self,
1629 GstEvent * event, gboolean flush, gboolean only_to_active_pads)
1633 evdata.event = event;
1634 evdata.result = TRUE;
1635 evdata.flush = flush;
1636 evdata.one_actually_seeked = FALSE;
1637 evdata.only_to_active_pads = only_to_active_pads;
1639 /* We first need to set all pads as flushing in a first pass
1640 * as flush_start flush_stop is sometimes sent synchronously
1641 * while we send the seek event */
1645 GST_OBJECT_LOCK (self);
1646 for (l = GST_ELEMENT_CAST (self)->sinkpads; l != NULL; l = l->next) {
1647 GstAggregatorPad *pad = l->data;
1650 pad->priv->pending_flush_start = TRUE;
1651 pad->priv->pending_flush_stop = FALSE;
1654 GST_OBJECT_UNLOCK (self);
1657 gst_pad_forward (self->srcpad, gst_aggregator_event_forward_func, &evdata);
1659 gst_event_unref (event);
1665 gst_aggregator_do_seek (GstAggregator * self, GstEvent * event)
1670 GstSeekType start_type, stop_type;
1674 GstAggregatorPrivate *priv = self->priv;
1676 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1677 &start, &stop_type, &stop);
1679 GST_INFO_OBJECT (self, "starting SEEK");
1681 flush = flags & GST_SEEK_FLAG_FLUSH;
1683 GST_OBJECT_LOCK (self);
1685 priv->pending_flush_start = TRUE;
1686 priv->flush_seeking = TRUE;
1689 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
1690 stop_type, stop, NULL);
1692 /* Seeking sets a position */
1693 self->priv->first_buffer = FALSE;
1694 GST_OBJECT_UNLOCK (self);
1696 /* forward the seek upstream */
1698 gst_aggregator_forward_event_to_all_sinkpads (self, event, flush, FALSE);
1701 if (!evdata.result || !evdata.one_actually_seeked) {
1702 GST_OBJECT_LOCK (self);
1703 priv->flush_seeking = FALSE;
1704 priv->pending_flush_start = FALSE;
1705 GST_OBJECT_UNLOCK (self);
1708 GST_INFO_OBJECT (self, "seek done, result: %d", evdata.result);
1710 return evdata.result;
1714 gst_aggregator_default_src_event (GstAggregator * self, GstEvent * event)
1717 gboolean res = TRUE;
1719 switch (GST_EVENT_TYPE (event)) {
1720 case GST_EVENT_SEEK:
1722 gst_event_ref (event);
1723 res = gst_aggregator_do_seek (self, event);
1724 gst_event_unref (event);
1728 case GST_EVENT_NAVIGATION:
1730 /* navigation is rather pointless. */
1732 gst_event_unref (event);
1741 /* Don't forward QOS events to pads that had no active buffer yet. Otherwise
1742 * they will receive a QOS event that has earliest_time=0 (because we can't
1743 * have negative timestamps), and consider their buffer as too late */
1745 gst_aggregator_forward_event_to_all_sinkpads (self, event, FALSE,
1746 GST_EVENT_TYPE (event) == GST_EVENT_QOS);
1747 res = evdata.result;
1754 gst_aggregator_src_pad_event_func (GstPad * pad, GstObject * parent,
1757 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
1759 return klass->src_event (GST_AGGREGATOR (parent), event);
1763 gst_aggregator_src_pad_query_func (GstPad * pad, GstObject * parent,
1766 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
1768 return klass->src_query (GST_AGGREGATOR (parent), query);
1772 gst_aggregator_src_pad_activate_mode_func (GstPad * pad,
1773 GstObject * parent, GstPadMode mode, gboolean active)
1775 GstAggregator *self = GST_AGGREGATOR (parent);
1776 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
1778 if (klass->src_activate) {
1779 if (klass->src_activate (self, mode, active) == FALSE) {
1784 if (active == TRUE) {
1786 case GST_PAD_MODE_PUSH:
1788 GST_INFO_OBJECT (pad, "Activating pad!");
1789 gst_aggregator_start_srcpad_task (self);
1794 GST_ERROR_OBJECT (pad, "Only supported mode is PUSH");
1801 GST_INFO_OBJECT (self, "Deactivating srcpad");
1802 gst_aggregator_stop_srcpad_task (self, FALSE);
1808 gst_aggregator_default_sink_query (GstAggregator * self,
1809 GstAggregatorPad * aggpad, GstQuery * query)
1811 GstPad *pad = GST_PAD (aggpad);
1813 return gst_pad_query_default (pad, GST_OBJECT (self), query);
1817 gst_aggregator_finalize (GObject * object)
1819 GstAggregator *self = (GstAggregator *) object;
1821 g_mutex_clear (&self->priv->src_lock);
1822 g_cond_clear (&self->priv->src_cond);
1824 G_OBJECT_CLASS (aggregator_parent_class)->finalize (object);
1828 * gst_aggregator_set_latency_property:
1829 * @agg: a #GstAggregator
1830 * @latency: the new latency value (in nanoseconds).
1832 * Sets the new latency value to @latency. This value is used to limit the
1833 * amount of time a pad waits for data to appear before considering the pad
1837 gst_aggregator_set_latency_property (GstAggregator * self, gint64 latency)
1841 g_return_if_fail (GST_IS_AGGREGATOR (self));
1842 g_return_if_fail (GST_CLOCK_TIME_IS_VALID (latency));
1845 changed = (self->priv->latency != latency);
1850 GST_OBJECT_LOCK (self);
1851 /* First lock all the pads */
1852 for (item = GST_ELEMENT_CAST (self)->sinkpads; item; item = item->next) {
1853 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
1857 self->priv->latency = latency;
1859 SRC_BROADCAST (self);
1861 /* Now wake up the pads */
1862 for (item = GST_ELEMENT_CAST (self)->sinkpads; item; item = item->next) {
1863 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
1864 PAD_BROADCAST_EVENT (aggpad);
1865 PAD_UNLOCK (aggpad);
1867 GST_OBJECT_UNLOCK (self);
1873 gst_element_post_message (GST_ELEMENT_CAST (self),
1874 gst_message_new_latency (GST_OBJECT_CAST (self)));
1878 * gst_aggregator_get_latency_property:
1879 * @agg: a #GstAggregator
1881 * Gets the latency value. See gst_aggregator_set_latency for
1884 * Returns: The time in nanoseconds to wait for data to arrive on a sink pad
1885 * before a pad is deemed unresponsive. A value of -1 means an
1889 gst_aggregator_get_latency_property (GstAggregator * agg)
1893 g_return_val_if_fail (GST_IS_AGGREGATOR (agg), -1);
1895 GST_OBJECT_LOCK (agg);
1896 res = agg->priv->latency;
1897 GST_OBJECT_UNLOCK (agg);
1903 gst_aggregator_set_property (GObject * object, guint prop_id,
1904 const GValue * value, GParamSpec * pspec)
1906 GstAggregator *agg = GST_AGGREGATOR (object);
1910 gst_aggregator_set_latency_property (agg, g_value_get_int64 (value));
1912 case PROP_START_TIME_SELECTION:
1913 agg->priv->start_time_selection = g_value_get_enum (value);
1915 case PROP_START_TIME:
1916 agg->priv->start_time = g_value_get_uint64 (value);
1919 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1925 gst_aggregator_get_property (GObject * object, guint prop_id,
1926 GValue * value, GParamSpec * pspec)
1928 GstAggregator *agg = GST_AGGREGATOR (object);
1932 g_value_set_int64 (value, gst_aggregator_get_latency_property (agg));
1934 case PROP_START_TIME_SELECTION:
1935 g_value_set_enum (value, agg->priv->start_time_selection);
1937 case PROP_START_TIME:
1938 g_value_set_uint64 (value, agg->priv->start_time);
1941 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1946 /* GObject vmethods implementations */
1948 gst_aggregator_class_init (GstAggregatorClass * klass)
1950 GObjectClass *gobject_class = (GObjectClass *) klass;
1951 GstElementClass *gstelement_class = (GstElementClass *) klass;
1953 aggregator_parent_class = g_type_class_peek_parent (klass);
1954 g_type_class_add_private (klass, sizeof (GstAggregatorPrivate));
1956 GST_DEBUG_CATEGORY_INIT (aggregator_debug, "aggregator",
1957 GST_DEBUG_FG_MAGENTA, "GstAggregator");
1959 klass->sinkpads_type = GST_TYPE_AGGREGATOR_PAD;
1961 klass->sink_event = gst_aggregator_default_sink_event;
1962 klass->sink_query = gst_aggregator_default_sink_query;
1964 klass->src_event = gst_aggregator_default_src_event;
1965 klass->src_query = gst_aggregator_default_src_query;
1967 klass->create_new_pad = gst_aggregator_default_create_new_pad;
1969 gstelement_class->request_new_pad =
1970 GST_DEBUG_FUNCPTR (gst_aggregator_request_new_pad);
1971 gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_aggregator_send_event);
1972 gstelement_class->release_pad =
1973 GST_DEBUG_FUNCPTR (gst_aggregator_release_pad);
1974 gstelement_class->change_state =
1975 GST_DEBUG_FUNCPTR (gst_aggregator_change_state);
1977 gobject_class->set_property = gst_aggregator_set_property;
1978 gobject_class->get_property = gst_aggregator_get_property;
1979 gobject_class->finalize = gst_aggregator_finalize;
1981 g_object_class_install_property (gobject_class, PROP_LATENCY,
1982 g_param_spec_int64 ("latency", "Buffer latency",
1983 "Additional latency in live mode to allow upstream "
1984 "to take longer to produce buffers for the current "
1985 "position (in nanoseconds)", 0,
1986 (G_MAXLONG == G_MAXINT64) ? G_MAXINT64 : (G_MAXLONG * GST_SECOND - 1),
1987 DEFAULT_LATENCY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1989 g_object_class_install_property (gobject_class, PROP_START_TIME_SELECTION,
1990 g_param_spec_enum ("start-time-selection", "Start Time Selection",
1991 "Decides which start time is output",
1992 gst_aggregator_start_time_selection_get_type (),
1993 DEFAULT_START_TIME_SELECTION,
1994 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1996 g_object_class_install_property (gobject_class, PROP_START_TIME,
1997 g_param_spec_uint64 ("start-time", "Start Time",
1998 "Start time to use if start-time-selection=set", 0,
2000 DEFAULT_START_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2002 GST_DEBUG_REGISTER_FUNCPTR (gst_aggregator_stop_pad);
2006 gst_aggregator_init (GstAggregator * self, GstAggregatorClass * klass)
2008 GstPadTemplate *pad_template;
2009 GstAggregatorPrivate *priv;
2011 g_return_if_fail (klass->aggregate != NULL);
2014 G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_AGGREGATOR,
2015 GstAggregatorPrivate);
2020 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "src");
2021 g_return_if_fail (pad_template != NULL);
2023 priv->max_padserial = -1;
2024 priv->tags_changed = FALSE;
2026 self->priv->peer_latency_live = FALSE;
2027 self->priv->peer_latency_min = self->priv->sub_latency_min = 0;
2028 self->priv->peer_latency_max = self->priv->sub_latency_max = 0;
2029 self->priv->has_peer_latency = FALSE;
2030 gst_aggregator_reset_flow_values (self);
2032 self->srcpad = gst_pad_new_from_template (pad_template, "src");
2034 gst_pad_set_event_function (self->srcpad,
2035 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_event_func));
2036 gst_pad_set_query_function (self->srcpad,
2037 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_query_func));
2038 gst_pad_set_activatemode_function (self->srcpad,
2039 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_activate_mode_func));
2041 gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
2043 self->priv->latency = DEFAULT_LATENCY;
2044 self->priv->start_time_selection = DEFAULT_START_TIME_SELECTION;
2045 self->priv->start_time = DEFAULT_START_TIME;
2047 g_mutex_init (&self->priv->src_lock);
2048 g_cond_init (&self->priv->src_cond);
2051 /* we can't use G_DEFINE_ABSTRACT_TYPE because we need the klass in the _init
2052 * method to get to the padtemplates */
2054 gst_aggregator_get_type (void)
2056 static volatile gsize type = 0;
2058 if (g_once_init_enter (&type)) {
2060 static const GTypeInfo info = {
2061 sizeof (GstAggregatorClass),
2064 (GClassInitFunc) gst_aggregator_class_init,
2067 sizeof (GstAggregator),
2069 (GInstanceInitFunc) gst_aggregator_init,
2072 _type = g_type_register_static (GST_TYPE_ELEMENT,
2073 "GstAggregator", &info, G_TYPE_FLAG_ABSTRACT);
2074 g_once_init_leave (&type, _type);
2079 /* Must be called with SRC lock and PAD lock held */
2081 gst_aggregator_pad_has_space (GstAggregator * self, GstAggregatorPad * aggpad)
2083 /* Empty queue always has space */
2084 if (g_queue_get_length (&aggpad->priv->buffers) == 0)
2087 /* We also want at least two buffers, one is being processed and one is ready
2088 * for the next iteration when we operate in live mode. */
2089 if (self->priv->peer_latency_live && aggpad->priv->num_buffers < 2)
2092 /* zero latency, if there is a buffer, it's full */
2093 if (self->priv->latency == 0)
2096 /* Allow no more buffers than the latency */
2097 return (aggpad->priv->time_level <= self->priv->latency);
2100 /* Must be called with the PAD_LOCK held */
2102 apply_buffer (GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head)
2104 GstClockTime timestamp;
2106 if (GST_BUFFER_DTS_IS_VALID (buffer))
2107 timestamp = GST_BUFFER_DTS (buffer);
2109 timestamp = GST_BUFFER_PTS (buffer);
2111 if (timestamp == GST_CLOCK_TIME_NONE) {
2113 timestamp = aggpad->priv->head_position;
2115 timestamp = aggpad->priv->tail_position;
2119 if (GST_BUFFER_DURATION_IS_VALID (buffer))
2120 timestamp += GST_BUFFER_DURATION (buffer);
2123 aggpad->priv->head_position = timestamp;
2125 aggpad->priv->tail_position = timestamp;
2127 update_time_level (aggpad, head);
2130 static GstFlowReturn
2131 gst_aggregator_pad_chain_internal (GstAggregator * self,
2132 GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head)
2134 GstBuffer *actual_buf = buffer;
2135 GstAggregatorClass *aggclass = GST_AGGREGATOR_GET_CLASS (self);
2136 GstFlowReturn flow_return;
2137 GstClockTime buf_pts;
2139 GST_DEBUG_OBJECT (aggpad, "Start chaining a buffer %" GST_PTR_FORMAT, buffer);
2141 PAD_FLUSH_LOCK (aggpad);
2144 flow_return = aggpad->priv->flow_return;
2145 if (flow_return != GST_FLOW_OK)
2148 if (aggpad->priv->pending_eos == TRUE)
2151 PAD_UNLOCK (aggpad);
2153 if (aggclass->clip && head) {
2154 aggclass->clip (self, aggpad, buffer, &actual_buf);
2157 if (actual_buf == NULL) {
2158 GST_LOG_OBJECT (actual_buf, "Buffer dropped by clip function");
2162 buf_pts = GST_BUFFER_PTS (actual_buf);
2164 aggpad->priv->first_buffer = FALSE;
2168 GST_OBJECT_LOCK (self);
2170 if (gst_aggregator_pad_has_space (self, aggpad)
2171 && aggpad->priv->flow_return == GST_FLOW_OK) {
2173 g_queue_push_head (&aggpad->priv->buffers, actual_buf);
2175 g_queue_push_tail (&aggpad->priv->buffers, actual_buf);
2176 apply_buffer (aggpad, actual_buf, head);
2177 aggpad->priv->num_buffers++;
2178 actual_buf = buffer = NULL;
2179 SRC_BROADCAST (self);
2183 flow_return = aggpad->priv->flow_return;
2184 if (flow_return != GST_FLOW_OK) {
2185 GST_OBJECT_UNLOCK (self);
2189 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
2190 GST_OBJECT_UNLOCK (self);
2192 PAD_WAIT_EVENT (aggpad);
2194 PAD_UNLOCK (aggpad);
2197 if (self->priv->first_buffer) {
2198 GstClockTime start_time;
2200 switch (self->priv->start_time_selection) {
2201 case GST_AGGREGATOR_START_TIME_SELECTION_ZERO:
2205 case GST_AGGREGATOR_START_TIME_SELECTION_FIRST:
2206 GST_OBJECT_LOCK (aggpad);
2207 if (aggpad->segment.format == GST_FORMAT_TIME) {
2208 start_time = buf_pts;
2209 if (start_time != -1) {
2210 start_time = MAX (start_time, aggpad->segment.start);
2212 gst_segment_to_running_time (&aggpad->segment, GST_FORMAT_TIME,
2217 GST_WARNING_OBJECT (aggpad,
2218 "Ignoring request of selecting the first start time "
2219 "as the segment is a %s segment instead of a time segment",
2220 gst_format_get_name (aggpad->segment.format));
2222 GST_OBJECT_UNLOCK (aggpad);
2224 case GST_AGGREGATOR_START_TIME_SELECTION_SET:
2225 start_time = self->priv->start_time;
2226 if (start_time == -1)
2231 if (start_time != -1) {
2232 if (self->segment.position == -1)
2233 self->segment.position = start_time;
2235 self->segment.position = MIN (start_time, self->segment.position);
2237 GST_DEBUG_OBJECT (self, "Selecting start time %" GST_TIME_FORMAT,
2238 GST_TIME_ARGS (start_time));
2242 PAD_UNLOCK (aggpad);
2243 GST_OBJECT_UNLOCK (self);
2248 PAD_FLUSH_UNLOCK (aggpad);
2250 GST_DEBUG_OBJECT (aggpad, "Done chaining");
2255 PAD_UNLOCK (aggpad);
2256 PAD_FLUSH_UNLOCK (aggpad);
2258 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping buffer",
2259 gst_flow_get_name (flow_return));
2261 gst_buffer_unref (buffer);
2266 PAD_UNLOCK (aggpad);
2267 PAD_FLUSH_UNLOCK (aggpad);
2269 gst_buffer_unref (buffer);
2270 GST_DEBUG_OBJECT (aggpad, "We are EOS already...");
2272 return GST_FLOW_EOS;
2275 static GstFlowReturn
2276 gst_aggregator_pad_chain (GstPad * pad, GstObject * object, GstBuffer * buffer)
2278 return gst_aggregator_pad_chain_internal (GST_AGGREGATOR_CAST (object),
2279 GST_AGGREGATOR_PAD_CAST (pad), buffer, TRUE);
2283 gst_aggregator_pad_query_func (GstPad * pad, GstObject * parent,
2286 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2287 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2289 if (GST_QUERY_IS_SERIALIZED (query)) {
2292 while (!gst_aggregator_pad_queue_is_empty (aggpad)
2293 && aggpad->priv->flow_return == GST_FLOW_OK) {
2294 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
2295 PAD_WAIT_EVENT (aggpad);
2298 if (aggpad->priv->flow_return != GST_FLOW_OK)
2301 PAD_UNLOCK (aggpad);
2304 return klass->sink_query (GST_AGGREGATOR (parent),
2305 GST_AGGREGATOR_PAD (pad), query);
2308 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping query",
2309 gst_flow_get_name (aggpad->priv->flow_return));
2310 PAD_UNLOCK (aggpad);
2314 static GstFlowReturn
2315 gst_aggregator_pad_event_func (GstPad * pad, GstObject * parent,
2318 GstFlowReturn ret = GST_FLOW_OK;
2319 GstAggregator *self = GST_AGGREGATOR (parent);
2320 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2321 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2323 if (GST_EVENT_IS_SERIALIZED (event) && GST_EVENT_TYPE (event) != GST_EVENT_EOS
2324 /* && GST_EVENT_TYPE (event) != GST_EVENT_SEGMENT_DONE */ ) {
2328 if (aggpad->priv->flow_return != GST_FLOW_OK
2329 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
2330 ret = aggpad->priv->flow_return;
2334 if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
2335 GST_OBJECT_LOCK (aggpad);
2336 gst_event_copy_segment (event, &aggpad->clip_segment);
2337 aggpad->priv->head_position = aggpad->clip_segment.position;
2338 update_time_level (aggpad, TRUE);
2339 GST_OBJECT_UNLOCK (aggpad);
2342 if (!gst_aggregator_pad_queue_is_empty (aggpad) &&
2343 GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
2344 GST_DEBUG_OBJECT (aggpad, "Store event in queue: %" GST_PTR_FORMAT,
2346 g_queue_push_head (&aggpad->priv->buffers, event);
2348 SRC_BROADCAST (self);
2350 PAD_UNLOCK (aggpad);
2355 gboolean is_caps = (GST_EVENT_TYPE (event) == GST_EVENT_CAPS);
2357 if (!klass->sink_event (self, aggpad, event)) {
2358 /* Copied from GstPad to convert boolean to a GstFlowReturn in
2359 * the event handling func */
2360 ret = is_caps ? GST_FLOW_NOT_NEGOTIATED : GST_FLOW_ERROR;
2367 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping event",
2368 gst_flow_get_name (aggpad->priv->flow_return));
2369 PAD_UNLOCK (aggpad);
2371 if (GST_EVENT_IS_STICKY (event))
2372 gst_pad_store_sticky_event (pad, event);
2373 gst_event_unref (event);
2379 gst_aggregator_pad_activate_mode_func (GstPad * pad,
2380 GstObject * parent, GstPadMode mode, gboolean active)
2382 GstAggregator *self = GST_AGGREGATOR (parent);
2383 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2385 if (active == FALSE) {
2387 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, TRUE);
2388 SRC_BROADCAST (self);
2392 aggpad->priv->flow_return = GST_FLOW_OK;
2393 PAD_BROADCAST_EVENT (aggpad);
2394 PAD_UNLOCK (aggpad);
2400 /***********************************
2401 * GstAggregatorPad implementation *
2402 ************************************/
2403 G_DEFINE_TYPE (GstAggregatorPad, gst_aggregator_pad, GST_TYPE_PAD);
2406 gst_aggregator_pad_constructed (GObject * object)
2408 GstPad *pad = GST_PAD (object);
2410 gst_pad_set_chain_function (pad,
2411 GST_DEBUG_FUNCPTR (gst_aggregator_pad_chain));
2412 gst_pad_set_event_full_function_full (pad,
2413 GST_DEBUG_FUNCPTR (gst_aggregator_pad_event_func), NULL, NULL);
2414 gst_pad_set_query_function (pad,
2415 GST_DEBUG_FUNCPTR (gst_aggregator_pad_query_func));
2416 gst_pad_set_activatemode_function (pad,
2417 GST_DEBUG_FUNCPTR (gst_aggregator_pad_activate_mode_func));
2421 gst_aggregator_pad_finalize (GObject * object)
2423 GstAggregatorPad *pad = (GstAggregatorPad *) object;
2425 g_cond_clear (&pad->priv->event_cond);
2426 g_mutex_clear (&pad->priv->flush_lock);
2427 g_mutex_clear (&pad->priv->lock);
2429 G_OBJECT_CLASS (gst_aggregator_pad_parent_class)->finalize (object);
2433 gst_aggregator_pad_dispose (GObject * object)
2435 GstAggregatorPad *pad = (GstAggregatorPad *) object;
2437 gst_aggregator_pad_set_flushing (pad, GST_FLOW_FLUSHING, TRUE);
2439 G_OBJECT_CLASS (gst_aggregator_pad_parent_class)->dispose (object);
2443 gst_aggregator_pad_class_init (GstAggregatorPadClass * klass)
2445 GObjectClass *gobject_class = (GObjectClass *) klass;
2447 g_type_class_add_private (klass, sizeof (GstAggregatorPadPrivate));
2449 gobject_class->constructed = gst_aggregator_pad_constructed;
2450 gobject_class->finalize = gst_aggregator_pad_finalize;
2451 gobject_class->dispose = gst_aggregator_pad_dispose;
2455 gst_aggregator_pad_init (GstAggregatorPad * pad)
2458 G_TYPE_INSTANCE_GET_PRIVATE (pad, GST_TYPE_AGGREGATOR_PAD,
2459 GstAggregatorPadPrivate);
2461 g_queue_init (&pad->priv->buffers);
2462 g_cond_init (&pad->priv->event_cond);
2464 g_mutex_init (&pad->priv->flush_lock);
2465 g_mutex_init (&pad->priv->lock);
2467 pad->priv->first_buffer = TRUE;
2468 gst_aggregator_pad_reset_unlocked (pad);
2472 * gst_aggregator_pad_steal_buffer:
2473 * @pad: the pad to get buffer from
2475 * Steal the ref to the buffer currently queued in @pad.
2477 * Returns: (transfer full): The buffer in @pad or NULL if no buffer was
2478 * queued. You should unref the buffer after usage.
2481 gst_aggregator_pad_steal_buffer (GstAggregatorPad * pad)
2483 GstBuffer *buffer = NULL;
2486 if (GST_IS_BUFFER (g_queue_peek_tail (&pad->priv->buffers)))
2487 buffer = g_queue_pop_tail (&pad->priv->buffers);
2490 apply_buffer (pad, buffer, FALSE);
2491 pad->priv->num_buffers--;
2492 GST_TRACE_OBJECT (pad, "Consuming buffer");
2493 if (gst_aggregator_pad_queue_is_empty (pad) && pad->priv->pending_eos) {
2494 pad->priv->pending_eos = FALSE;
2495 pad->priv->eos = TRUE;
2497 PAD_BROADCAST_EVENT (pad);
2498 GST_DEBUG_OBJECT (pad, "Consumed: %" GST_PTR_FORMAT, buffer);
2506 * gst_aggregator_pad_drop_buffer:
2507 * @pad: the pad where to drop any pending buffer
2509 * Drop the buffer currently queued in @pad.
2511 * Returns: TRUE if there was a buffer queued in @pad, or FALSE if not.
2514 gst_aggregator_pad_drop_buffer (GstAggregatorPad * pad)
2518 buf = gst_aggregator_pad_steal_buffer (pad);
2523 gst_buffer_unref (buf);
2528 * gst_aggregator_pad_get_buffer:
2529 * @pad: the pad to get buffer from
2531 * Returns: (transfer full): A reference to the buffer in @pad or
2532 * NULL if no buffer was queued. You should unref the buffer after
2536 gst_aggregator_pad_get_buffer (GstAggregatorPad * pad)
2538 GstBuffer *buffer = NULL;
2541 buffer = g_queue_peek_tail (&pad->priv->buffers);
2542 /* The tail should always be a buffer, because if it is an event,
2543 * it will be consumed immeditaly in gst_aggregator_steal_buffer */
2545 if (GST_IS_BUFFER (buffer))
2546 gst_buffer_ref (buffer);
2555 gst_aggregator_pad_is_eos (GstAggregatorPad * pad)
2560 is_eos = pad->priv->eos;
2567 * gst_aggregator_merge_tags:
2568 * @self: a #GstAggregator
2569 * @tags: a #GstTagList to merge
2570 * @mode: the #GstTagMergeMode to use
2572 * Adds tags to so-called pending tags, which will be processed
2573 * before pushing out data downstream.
2575 * Note that this is provided for convenience, and the subclass is
2576 * not required to use this and can still do tag handling on its own.
2581 gst_aggregator_merge_tags (GstAggregator * self,
2582 const GstTagList * tags, GstTagMergeMode mode)
2586 g_return_if_fail (GST_IS_AGGREGATOR (self));
2587 g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
2589 /* FIXME Check if we can use OBJECT lock here! */
2590 GST_OBJECT_LOCK (self);
2592 GST_DEBUG_OBJECT (self, "merging tags %" GST_PTR_FORMAT, tags);
2593 otags = self->priv->tags;
2594 self->priv->tags = gst_tag_list_merge (self->priv->tags, tags, mode);
2596 gst_tag_list_unref (otags);
2597 self->priv->tags_changed = TRUE;
2598 GST_OBJECT_UNLOCK (self);
2602 * gst_aggregator_set_latency:
2603 * @self: a #GstAggregator
2604 * @min_latency: minimum latency
2605 * @max_latency: maximum latency
2607 * Lets #GstAggregator sub-classes tell the baseclass what their internal
2608 * latency is. Will also post a LATENCY message on the bus so the pipeline
2609 * can reconfigure its global latency.
2612 gst_aggregator_set_latency (GstAggregator * self,
2613 GstClockTime min_latency, GstClockTime max_latency)
2615 gboolean changed = FALSE;
2617 g_return_if_fail (GST_IS_AGGREGATOR (self));
2618 g_return_if_fail (GST_CLOCK_TIME_IS_VALID (min_latency));
2619 g_return_if_fail (max_latency >= min_latency);
2622 if (self->priv->sub_latency_min != min_latency) {
2623 self->priv->sub_latency_min = min_latency;
2626 if (self->priv->sub_latency_max != max_latency) {
2627 self->priv->sub_latency_max = max_latency;
2632 SRC_BROADCAST (self);
2636 gst_element_post_message (GST_ELEMENT_CAST (self),
2637 gst_message_new_latency (GST_OBJECT_CAST (self)));