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 * @short_description: manages a set of pads with the purpose of
25 * aggregating their buffers.
26 * @see_also: gstcollectpads for historical reasons.
28 * Manages a set of pads with the purpose of aggregating their buffers.
29 * 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.
36 * When data is queued on all pads, tha aggregate vmethod is called.
39 * One can peek at the data on any given GstAggregatorPad with the
40 * gst_aggregator_pad_get_buffer () method, and take ownership of it
41 * with the gst_aggregator_pad_steal_buffer () method. When a buffer
42 * has been taken with steal_buffer (), a new buffer can be queued
46 * If the subclass wishes to push a buffer downstream in its aggregate
47 * implementation, it should do so through the
48 * gst_aggregator_finish_buffer () method. This method will take care
49 * of sending and ordering mandatory events such as stream start, caps
53 * Same goes for EOS events, which should not be pushed directly by the
54 * subclass, it should instead return GST_FLOW_EOS in its aggregate
58 * Note that the aggregator logic regarding gap event handling is to turn
59 * these into gap buffers with matching PTS and duration. It will also
60 * flag these buffers with GST_BUFFER_FLAG_GAP and GST_BUFFER_FLAG_DROPPABLE
61 * to ease their identification and subsequent processing.
70 #include <string.h> /* strlen */
72 #include "gstaggregator.h"
76 GST_AGGREGATOR_START_TIME_SELECTION_ZERO,
77 GST_AGGREGATOR_START_TIME_SELECTION_FIRST,
78 GST_AGGREGATOR_START_TIME_SELECTION_SET
79 } GstAggregatorStartTimeSelection;
82 gst_aggregator_start_time_selection_get_type (void)
84 static GType gtype = 0;
87 static const GEnumValue values[] = {
88 {GST_AGGREGATOR_START_TIME_SELECTION_ZERO,
89 "Start at 0 running time (default)", "zero"},
90 {GST_AGGREGATOR_START_TIME_SELECTION_FIRST,
91 "Start at first observed input running time", "first"},
92 {GST_AGGREGATOR_START_TIME_SELECTION_SET,
93 "Set start time with start-time property", "set"},
97 gtype = g_enum_register_static ("GstAggregatorStartTimeSelection", values);
102 /* Might become API */
103 static void gst_aggregator_merge_tags (GstAggregator * aggregator,
104 const GstTagList * tags, GstTagMergeMode mode);
105 static void gst_aggregator_set_latency_property (GstAggregator * agg,
107 static gint64 gst_aggregator_get_latency_property (GstAggregator * agg);
110 /* Locking order, locks in this element must always be taken in this order
112 * standard sink pad stream lock -> GST_PAD_STREAM_LOCK (aggpad)
113 * Aggregator pad flush lock -> PAD_FLUSH_LOCK(aggpad)
114 * standard src pad stream lock -> GST_PAD_STREAM_LOCK (srcpad)
115 * Aggregator src lock -> SRC_LOCK(agg) w/ SRC_WAIT/BROADCAST
116 * standard element object lock -> GST_OBJECT_LOCK(agg)
117 * Aggregator pad lock -> PAD_LOCK (aggpad) w/ PAD_WAIT/BROADCAST_EVENT(aggpad)
118 * standard src pad object lock -> GST_OBJECT_LOCK(srcpad)
119 * standard sink pad object lock -> GST_OBJECT_LOCK(aggpad)
123 static GstClockTime gst_aggregator_get_latency_unlocked (GstAggregator * self);
125 GST_DEBUG_CATEGORY_STATIC (aggregator_debug);
126 #define GST_CAT_DEFAULT aggregator_debug
128 /* GstAggregatorPad definitions */
129 #define PAD_LOCK(pad) G_STMT_START { \
130 GST_TRACE_OBJECT (pad, "Taking PAD lock from thread %p", \
132 g_mutex_lock(&pad->priv->lock); \
133 GST_TRACE_OBJECT (pad, "Took PAD lock from thread %p", \
137 #define PAD_UNLOCK(pad) G_STMT_START { \
138 GST_TRACE_OBJECT (pad, "Releasing PAD lock from thread %p", \
140 g_mutex_unlock(&pad->priv->lock); \
141 GST_TRACE_OBJECT (pad, "Release PAD lock from thread %p", \
146 #define PAD_WAIT_EVENT(pad) G_STMT_START { \
147 GST_LOG_OBJECT (pad, "Waiting for buffer to be consumed thread %p", \
149 g_cond_wait(&(((GstAggregatorPad* )pad)->priv->event_cond), \
150 (&((GstAggregatorPad*)pad)->priv->lock)); \
151 GST_LOG_OBJECT (pad, "DONE Waiting for buffer to be consumed on thread %p", \
155 #define PAD_BROADCAST_EVENT(pad) G_STMT_START { \
156 GST_LOG_OBJECT (pad, "Signaling buffer consumed from thread %p", \
158 g_cond_broadcast(&(((GstAggregatorPad* )pad)->priv->event_cond)); \
162 #define PAD_FLUSH_LOCK(pad) G_STMT_START { \
163 GST_TRACE_OBJECT (pad, "Taking lock from thread %p", \
165 g_mutex_lock(&pad->priv->flush_lock); \
166 GST_TRACE_OBJECT (pad, "Took lock from thread %p", \
170 #define PAD_FLUSH_UNLOCK(pad) G_STMT_START { \
171 GST_TRACE_OBJECT (pad, "Releasing lock from thread %p", \
173 g_mutex_unlock(&pad->priv->flush_lock); \
174 GST_TRACE_OBJECT (pad, "Release lock from thread %p", \
178 #define SRC_LOCK(self) G_STMT_START { \
179 GST_TRACE_OBJECT (self, "Taking src lock from thread %p", \
181 g_mutex_lock(&self->priv->src_lock); \
182 GST_TRACE_OBJECT (self, "Took src lock from thread %p", \
186 #define SRC_UNLOCK(self) G_STMT_START { \
187 GST_TRACE_OBJECT (self, "Releasing src lock from thread %p", \
189 g_mutex_unlock(&self->priv->src_lock); \
190 GST_TRACE_OBJECT (self, "Released src lock from thread %p", \
194 #define SRC_WAIT(self) G_STMT_START { \
195 GST_LOG_OBJECT (self, "Waiting for src on thread %p", \
197 g_cond_wait(&(self->priv->src_cond), &(self->priv->src_lock)); \
198 GST_LOG_OBJECT (self, "DONE Waiting for src on thread %p", \
202 #define SRC_BROADCAST(self) G_STMT_START { \
203 GST_LOG_OBJECT (self, "Signaling src from thread %p", \
205 if (self->priv->aggregate_id) \
206 gst_clock_id_unschedule (self->priv->aggregate_id); \
207 g_cond_broadcast(&(self->priv->src_cond)); \
210 struct _GstAggregatorPadPrivate
212 /* Following fields are protected by the PAD_LOCK */
213 GstFlowReturn flow_return;
214 gboolean pending_flush_start;
215 gboolean pending_flush_stop;
216 gboolean pending_eos;
218 gboolean first_buffer;
222 GstClockTime head_position;
223 GstClockTime tail_position;
224 GstClockTime head_time;
225 GstClockTime tail_time;
226 GstClockTime time_level;
232 /* This lock prevents a flush start processing happening while
233 * the chain function is also happening.
239 gst_aggregator_pad_flush (GstAggregatorPad * aggpad, GstAggregator * agg)
241 GstAggregatorPadClass *klass = GST_AGGREGATOR_PAD_GET_CLASS (aggpad);
244 aggpad->priv->pending_eos = FALSE;
245 aggpad->priv->eos = FALSE;
246 aggpad->priv->flow_return = GST_FLOW_OK;
247 GST_OBJECT_LOCK (aggpad);
248 gst_segment_init (&aggpad->segment, GST_FORMAT_UNDEFINED);
249 gst_segment_init (&aggpad->clip_segment, GST_FORMAT_UNDEFINED);
250 GST_OBJECT_UNLOCK (aggpad);
251 aggpad->priv->head_position = GST_CLOCK_TIME_NONE;
252 aggpad->priv->tail_position = GST_CLOCK_TIME_NONE;
253 aggpad->priv->head_time = GST_CLOCK_TIME_NONE;
254 aggpad->priv->tail_time = GST_CLOCK_TIME_NONE;
255 aggpad->priv->time_level = 0;
259 return klass->flush (aggpad, agg);
264 /*************************************
265 * GstAggregator implementation *
266 *************************************/
267 static GstElementClass *aggregator_parent_class = NULL;
269 /* All members are protected by the object lock unless otherwise noted */
271 struct _GstAggregatorPrivate
275 /* Our state is >= PAUSED */
276 gboolean running; /* protected by src_lock */
279 gboolean send_stream_start; /* protected by srcpad stream lock */
280 gboolean send_segment;
281 gboolean flush_seeking;
282 gboolean pending_flush_start;
283 gboolean send_eos; /* protected by srcpad stream lock */
285 GstCaps *srccaps; /* protected by the srcpad stream lock */
288 gboolean tags_changed;
290 gboolean peer_latency_live; /* protected by src_lock */
291 GstClockTime peer_latency_min; /* protected by src_lock */
292 GstClockTime peer_latency_max; /* protected by src_lock */
293 gboolean has_peer_latency; /* protected by src_lock */
295 GstClockTime sub_latency_min; /* protected by src_lock */
296 GstClockTime sub_latency_max; /* protected by src_lock */
299 GstClockID aggregate_id; /* protected by src_lock */
303 gboolean first_buffer; /* protected by object lock */
304 GstAggregatorStartTimeSelection start_time_selection;
305 GstClockTime start_time;
308 gint64 latency; /* protected by both src_lock and all pad locks */
316 gboolean only_to_active_pads;
318 gboolean one_actually_seeked;
321 #define DEFAULT_LATENCY 0
322 #define DEFAULT_START_TIME_SELECTION GST_AGGREGATOR_START_TIME_SELECTION_ZERO
323 #define DEFAULT_START_TIME (-1)
329 PROP_START_TIME_SELECTION,
334 static GstFlowReturn gst_aggregator_pad_chain_internal (GstAggregator * self,
335 GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head);
338 * gst_aggregator_iterate_sinkpads:
339 * @self: The #GstAggregator
340 * @func: (scope call): The function to call.
341 * @user_data: (closure): The data to pass to @func.
343 * Iterate the sinkpads of aggregator to call a function on them.
345 * This method guarantees that @func will be called only once for each
349 gst_aggregator_iterate_sinkpads (GstAggregator * self,
350 GstAggregatorPadForeachFunc func, gpointer user_data)
352 gboolean result = FALSE;
354 gboolean done = FALSE;
355 GValue item = { 0, };
356 GList *seen_pads = NULL;
358 iter = gst_element_iterate_sink_pads (GST_ELEMENT (self));
364 switch (gst_iterator_next (iter, &item)) {
365 case GST_ITERATOR_OK:
367 GstAggregatorPad *pad;
369 pad = g_value_get_object (&item);
371 /* if already pushed, skip. FIXME, find something faster to tag pads */
372 if (pad == NULL || g_list_find (seen_pads, pad)) {
373 g_value_reset (&item);
377 GST_LOG_OBJECT (pad, "calling function %s on pad",
378 GST_DEBUG_FUNCPTR_NAME (func));
380 result = func (self, pad, user_data);
384 seen_pads = g_list_prepend (seen_pads, pad);
386 g_value_reset (&item);
389 case GST_ITERATOR_RESYNC:
390 gst_iterator_resync (iter);
392 case GST_ITERATOR_ERROR:
393 GST_ERROR_OBJECT (self,
394 "Could not iterate over internally linked pads");
397 case GST_ITERATOR_DONE:
402 g_value_unset (&item);
403 gst_iterator_free (iter);
405 if (seen_pads == NULL) {
406 GST_DEBUG_OBJECT (self, "No pad seen");
410 g_list_free (seen_pads);
417 gst_aggregator_pad_queue_is_empty (GstAggregatorPad * pad)
419 return (g_queue_peek_tail (&pad->priv->buffers) == NULL);
423 gst_aggregator_check_pads_ready (GstAggregator * self)
425 GstAggregatorPad *pad;
428 GST_LOG_OBJECT (self, "checking pads");
430 GST_OBJECT_LOCK (self);
432 sinkpads = GST_ELEMENT_CAST (self)->sinkpads;
433 if (sinkpads == NULL)
436 for (l = sinkpads; l != NULL; l = l->next) {
441 /* In live mode, having a single pad with buffers is enough to
442 * generate a start time from it. In non-live mode all pads need
445 if (self->priv->peer_latency_live &&
446 !gst_aggregator_pad_queue_is_empty (pad))
447 self->priv->first_buffer = FALSE;
449 if (gst_aggregator_pad_queue_is_empty (pad) && !pad->priv->eos) {
457 self->priv->first_buffer = FALSE;
459 GST_OBJECT_UNLOCK (self);
460 GST_LOG_OBJECT (self, "pads are ready");
465 GST_LOG_OBJECT (self, "pads not ready: no sink pads");
466 GST_OBJECT_UNLOCK (self);
471 GST_LOG_OBJECT (pad, "pad not ready to be aggregated yet");
472 GST_OBJECT_UNLOCK (self);
478 gst_aggregator_reset_flow_values (GstAggregator * self)
480 GST_OBJECT_LOCK (self);
481 self->priv->send_stream_start = TRUE;
482 self->priv->send_segment = TRUE;
483 gst_segment_init (&self->segment, GST_FORMAT_TIME);
484 self->priv->first_buffer = TRUE;
485 GST_OBJECT_UNLOCK (self);
489 gst_aggregator_push_mandatory_events (GstAggregator * self)
491 GstAggregatorPrivate *priv = self->priv;
492 GstEvent *segment = NULL;
493 GstEvent *tags = NULL;
495 if (self->priv->send_stream_start) {
498 GST_INFO_OBJECT (self, "pushing stream start");
499 /* stream-start (FIXME: create id based on input ids) */
500 g_snprintf (s_id, sizeof (s_id), "agg-%08x", g_random_int ());
501 if (!gst_pad_push_event (self->srcpad, gst_event_new_stream_start (s_id))) {
502 GST_WARNING_OBJECT (self->srcpad, "Sending stream start event failed");
504 self->priv->send_stream_start = FALSE;
507 if (self->priv->srccaps) {
509 GST_INFO_OBJECT (self, "pushing caps: %" GST_PTR_FORMAT,
510 self->priv->srccaps);
511 if (!gst_pad_push_event (self->srcpad,
512 gst_event_new_caps (self->priv->srccaps))) {
513 GST_WARNING_OBJECT (self->srcpad, "Sending caps event failed");
515 gst_caps_unref (self->priv->srccaps);
516 self->priv->srccaps = NULL;
519 GST_OBJECT_LOCK (self);
520 if (self->priv->send_segment && !self->priv->flush_seeking) {
521 segment = gst_event_new_segment (&self->segment);
523 if (!self->priv->seqnum)
524 self->priv->seqnum = gst_event_get_seqnum (segment);
526 gst_event_set_seqnum (segment, self->priv->seqnum);
527 self->priv->send_segment = FALSE;
529 GST_DEBUG_OBJECT (self, "pushing segment %" GST_PTR_FORMAT, segment);
532 if (priv->tags && priv->tags_changed && !self->priv->flush_seeking) {
533 tags = gst_event_new_tag (gst_tag_list_ref (priv->tags));
534 priv->tags_changed = FALSE;
536 GST_OBJECT_UNLOCK (self);
539 gst_pad_push_event (self->srcpad, segment);
541 gst_pad_push_event (self->srcpad, tags);
546 * gst_aggregator_set_src_caps:
547 * @self: The #GstAggregator
548 * @caps: The #GstCaps to set on the src pad.
550 * Sets the caps to be used on the src pad.
553 gst_aggregator_set_src_caps (GstAggregator * self, GstCaps * caps)
555 GST_PAD_STREAM_LOCK (self->srcpad);
556 gst_caps_replace (&self->priv->srccaps, caps);
557 gst_aggregator_push_mandatory_events (self);
558 GST_PAD_STREAM_UNLOCK (self->srcpad);
562 * gst_aggregator_finish_buffer:
563 * @self: The #GstAggregator
564 * @buffer: (transfer full): the #GstBuffer to push.
566 * This method will push the provided output buffer downstream. If needed,
567 * mandatory events such as stream-start, caps, and segment events will be
568 * sent before pushing the buffer.
571 gst_aggregator_finish_buffer (GstAggregator * self, GstBuffer * buffer)
573 gst_aggregator_push_mandatory_events (self);
575 GST_OBJECT_LOCK (self);
576 if (!self->priv->flush_seeking && gst_pad_is_active (self->srcpad)) {
577 GST_TRACE_OBJECT (self, "pushing buffer %" GST_PTR_FORMAT, buffer);
578 GST_OBJECT_UNLOCK (self);
579 return gst_pad_push (self->srcpad, buffer);
581 GST_INFO_OBJECT (self, "Not pushing (active: %i, flushing: %i)",
582 self->priv->flush_seeking, gst_pad_is_active (self->srcpad));
583 GST_OBJECT_UNLOCK (self);
584 gst_buffer_unref (buffer);
590 gst_aggregator_push_eos (GstAggregator * self)
593 gst_aggregator_push_mandatory_events (self);
595 event = gst_event_new_eos ();
597 GST_OBJECT_LOCK (self);
598 self->priv->send_eos = FALSE;
599 gst_event_set_seqnum (event, self->priv->seqnum);
600 GST_OBJECT_UNLOCK (self);
602 gst_pad_push_event (self->srcpad, event);
606 gst_aggregator_get_next_time (GstAggregator * self)
608 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
610 if (klass->get_next_time)
611 return klass->get_next_time (self);
613 return GST_CLOCK_TIME_NONE;
617 gst_aggregator_wait_and_check (GstAggregator * self, gboolean * timeout)
619 GstClockTime latency;
627 latency = gst_aggregator_get_latency_unlocked (self);
629 if (gst_aggregator_check_pads_ready (self)) {
630 GST_DEBUG_OBJECT (self, "all pads have data");
636 /* Before waiting, check if we're actually still running */
637 if (!self->priv->running || !self->priv->send_eos) {
643 start = gst_aggregator_get_next_time (self);
645 /* If we're not live, or if we use the running time
646 * of the first buffer as start time, we wait until
647 * all pads have buffers.
648 * Otherwise (i.e. if we are live!), we wait on the clock
649 * and if a pad does not have a buffer in time we ignore
652 GST_OBJECT_LOCK (self);
653 if (!GST_CLOCK_TIME_IS_VALID (latency) ||
654 !GST_IS_CLOCK (GST_ELEMENT_CLOCK (self)) ||
655 !GST_CLOCK_TIME_IS_VALID (start) ||
656 (self->priv->first_buffer
657 && self->priv->start_time_selection ==
658 GST_AGGREGATOR_START_TIME_SELECTION_FIRST)) {
659 /* We wake up here when something happened, and below
660 * then check if we're ready now. If we return FALSE,
661 * we will be directly called again.
663 GST_OBJECT_UNLOCK (self);
666 GstClockTime base_time, time;
668 GstClockReturn status;
669 GstClockTimeDiff jitter;
671 GST_DEBUG_OBJECT (self, "got subclass start time: %" GST_TIME_FORMAT,
672 GST_TIME_ARGS (start));
674 base_time = GST_ELEMENT_CAST (self)->base_time;
675 clock = gst_object_ref (GST_ELEMENT_CLOCK (self));
676 GST_OBJECT_UNLOCK (self);
678 time = base_time + start;
681 GST_DEBUG_OBJECT (self, "possibly waiting for clock to reach %"
682 GST_TIME_FORMAT " (base %" GST_TIME_FORMAT " start %" GST_TIME_FORMAT
683 " latency %" GST_TIME_FORMAT " current %" GST_TIME_FORMAT ")",
684 GST_TIME_ARGS (time),
685 GST_TIME_ARGS (base_time),
686 GST_TIME_ARGS (start), GST_TIME_ARGS (latency),
687 GST_TIME_ARGS (gst_clock_get_time (clock)));
689 self->priv->aggregate_id = gst_clock_new_single_shot_id (clock, time);
690 gst_object_unref (clock);
694 status = gst_clock_id_wait (self->priv->aggregate_id, &jitter);
697 if (self->priv->aggregate_id) {
698 gst_clock_id_unref (self->priv->aggregate_id);
699 self->priv->aggregate_id = NULL;
702 GST_DEBUG_OBJECT (self,
703 "clock returned %d (jitter: %" GST_STIME_FORMAT ")",
704 status, GST_STIME_ARGS (jitter));
707 if (status == GST_CLOCK_OK || status == GST_CLOCK_EARLY) {
714 res = gst_aggregator_check_pads_ready (self);
721 check_events (GstAggregator * self, GstAggregatorPad * pad, gpointer user_data)
723 GstEvent *event = NULL;
724 GstAggregatorClass *klass = NULL;
725 gboolean *processed_event = user_data;
731 if (gst_aggregator_pad_queue_is_empty (pad) && pad->priv->pending_eos) {
732 pad->priv->pending_eos = FALSE;
733 pad->priv->eos = TRUE;
735 if (GST_IS_EVENT (g_queue_peek_tail (&pad->priv->buffers))) {
736 event = g_queue_pop_tail (&pad->priv->buffers);
737 PAD_BROADCAST_EVENT (pad);
742 *processed_event = TRUE;
744 klass = GST_AGGREGATOR_GET_CLASS (self);
746 GST_LOG_OBJECT (pad, "Processing %" GST_PTR_FORMAT, event);
747 klass->sink_event (self, pad, event);
749 } while (event != NULL);
755 gst_aggregator_pad_set_flushing (GstAggregatorPad * aggpad,
756 GstFlowReturn flow_return, gboolean full)
761 if (flow_return == GST_FLOW_NOT_LINKED)
762 aggpad->priv->flow_return = MIN (flow_return, aggpad->priv->flow_return);
764 aggpad->priv->flow_return = flow_return;
766 item = g_queue_peek_head_link (&aggpad->priv->buffers);
768 GList *next = item->next;
770 /* In partial flush, we do like the pad, we get rid of non-sticky events
773 if (full || GST_IS_BUFFER (item->data) ||
774 GST_EVENT_TYPE (item->data) == GST_EVENT_EOS ||
775 GST_EVENT_TYPE (item->data) == GST_EVENT_SEGMENT ||
776 !GST_EVENT_IS_STICKY (item->data)) {
777 gst_mini_object_unref (item->data);
778 g_queue_delete_link (&aggpad->priv->buffers, item);
782 aggpad->priv->num_buffers = 0;
784 PAD_BROADCAST_EVENT (aggpad);
789 gst_aggregator_aggregate_func (GstAggregator * self)
791 GstAggregatorPrivate *priv = self->priv;
792 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
793 gboolean timeout = FALSE;
795 if (self->priv->running == FALSE) {
796 GST_DEBUG_OBJECT (self, "Not running anymore");
800 GST_LOG_OBJECT (self, "Checking aggregate");
801 while (priv->send_eos && priv->running) {
802 GstFlowReturn flow_return;
803 gboolean processed_event = FALSE;
805 gst_aggregator_iterate_sinkpads (self, check_events, NULL);
807 if (!gst_aggregator_wait_and_check (self, &timeout))
810 gst_aggregator_iterate_sinkpads (self, check_events, &processed_event);
814 GST_TRACE_OBJECT (self, "Actually aggregating!");
815 flow_return = klass->aggregate (self, timeout);
817 GST_OBJECT_LOCK (self);
818 if (flow_return == GST_FLOW_FLUSHING && priv->flush_seeking) {
819 /* We don't want to set the pads to flushing, but we want to
820 * stop the thread, so just break here */
821 GST_OBJECT_UNLOCK (self);
824 GST_OBJECT_UNLOCK (self);
826 if (flow_return == GST_FLOW_EOS || flow_return == GST_FLOW_ERROR) {
827 gst_aggregator_push_eos (self);
830 GST_LOG_OBJECT (self, "flow return is %s", gst_flow_get_name (flow_return));
832 if (flow_return != GST_FLOW_OK) {
835 GST_OBJECT_LOCK (self);
836 for (item = GST_ELEMENT (self)->sinkpads; item; item = item->next) {
837 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
839 gst_aggregator_pad_set_flushing (aggpad, flow_return, TRUE);
841 GST_OBJECT_UNLOCK (self);
846 /* Pause the task here, the only ways to get here are:
847 * 1) We're stopping, in which case the task is stopped anyway
848 * 2) We got a flow error above, in which case it might take
849 * some time to forward the flow return upstream and we
850 * would otherwise call the task function over and over
851 * again without doing anything
853 gst_pad_pause_task (self->srcpad);
857 gst_aggregator_start (GstAggregator * self)
859 GstAggregatorClass *klass;
862 self->priv->send_stream_start = TRUE;
863 self->priv->send_segment = TRUE;
864 self->priv->send_eos = TRUE;
865 self->priv->srccaps = NULL;
867 klass = GST_AGGREGATOR_GET_CLASS (self);
870 result = klass->start (self);
878 _check_pending_flush_stop (GstAggregatorPad * pad)
883 res = (!pad->priv->pending_flush_stop && !pad->priv->pending_flush_start);
890 gst_aggregator_stop_srcpad_task (GstAggregator * self, GstEvent * flush_start)
894 GST_INFO_OBJECT (self, "%s srcpad task",
895 flush_start ? "Pausing" : "Stopping");
898 self->priv->running = FALSE;
899 SRC_BROADCAST (self);
903 res = gst_pad_push_event (self->srcpad, flush_start);
906 gst_pad_stop_task (self->srcpad);
912 gst_aggregator_start_srcpad_task (GstAggregator * self)
914 GST_INFO_OBJECT (self, "Starting srcpad task");
916 self->priv->running = TRUE;
917 gst_pad_start_task (GST_PAD (self->srcpad),
918 (GstTaskFunction) gst_aggregator_aggregate_func, self, NULL);
922 gst_aggregator_flush (GstAggregator * self)
924 GstFlowReturn ret = GST_FLOW_OK;
925 GstAggregatorPrivate *priv = self->priv;
926 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
928 GST_DEBUG_OBJECT (self, "Flushing everything");
929 GST_OBJECT_LOCK (self);
930 priv->send_segment = TRUE;
931 priv->flush_seeking = FALSE;
932 priv->tags_changed = FALSE;
933 GST_OBJECT_UNLOCK (self);
935 ret = klass->flush (self);
941 /* Called with GstAggregator's object lock held */
944 gst_aggregator_all_flush_stop_received_locked (GstAggregator * self)
947 GstAggregatorPad *tmppad;
949 for (tmp = GST_ELEMENT (self)->sinkpads; tmp; tmp = tmp->next) {
950 tmppad = (GstAggregatorPad *) tmp->data;
952 if (_check_pending_flush_stop (tmppad) == FALSE) {
953 GST_DEBUG_OBJECT (tmppad, "Is not last %i -- %i",
954 tmppad->priv->pending_flush_start, tmppad->priv->pending_flush_stop);
963 gst_aggregator_flush_start (GstAggregator * self, GstAggregatorPad * aggpad,
966 GstAggregatorPrivate *priv = self->priv;
967 GstAggregatorPadPrivate *padpriv = aggpad->priv;
969 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, FALSE);
971 PAD_FLUSH_LOCK (aggpad);
973 if (padpriv->pending_flush_start) {
974 GST_DEBUG_OBJECT (aggpad, "Expecting FLUSH_STOP now");
976 padpriv->pending_flush_start = FALSE;
977 padpriv->pending_flush_stop = TRUE;
981 GST_OBJECT_LOCK (self);
982 if (priv->flush_seeking) {
983 /* If flush_seeking we forward the first FLUSH_START */
984 if (priv->pending_flush_start) {
985 priv->pending_flush_start = FALSE;
986 GST_OBJECT_UNLOCK (self);
988 GST_INFO_OBJECT (self, "Flushing, pausing srcpad task");
989 gst_aggregator_stop_srcpad_task (self, event);
991 GST_INFO_OBJECT (self, "Getting STREAM_LOCK while seeking");
992 GST_PAD_STREAM_LOCK (self->srcpad);
993 GST_LOG_OBJECT (self, "GOT STREAM_LOCK");
996 GST_OBJECT_UNLOCK (self);
997 gst_event_unref (event);
1000 GST_OBJECT_UNLOCK (self);
1001 gst_event_unref (event);
1003 PAD_FLUSH_UNLOCK (aggpad);
1006 /* Must be called with the the PAD_LOCK held */
1008 update_time_level (GstAggregatorPad * aggpad, gboolean head)
1011 if (GST_CLOCK_TIME_IS_VALID (aggpad->priv->head_position) &&
1012 aggpad->clip_segment.format == GST_FORMAT_TIME)
1013 aggpad->priv->head_time =
1014 gst_segment_to_running_time (&aggpad->clip_segment,
1015 GST_FORMAT_TIME, aggpad->priv->head_position);
1017 aggpad->priv->head_time = GST_CLOCK_TIME_NONE;
1019 if (GST_CLOCK_TIME_IS_VALID (aggpad->priv->tail_position) &&
1020 aggpad->segment.format == GST_FORMAT_TIME)
1021 aggpad->priv->tail_time =
1022 gst_segment_to_running_time (&aggpad->segment,
1023 GST_FORMAT_TIME, aggpad->priv->tail_position);
1025 aggpad->priv->tail_time = aggpad->priv->head_time;
1028 if (aggpad->priv->head_time == GST_CLOCK_TIME_NONE ||
1029 aggpad->priv->tail_time == GST_CLOCK_TIME_NONE) {
1030 aggpad->priv->time_level = 0;
1034 if (aggpad->priv->tail_time > aggpad->priv->head_time)
1035 aggpad->priv->time_level = 0;
1037 aggpad->priv->time_level = aggpad->priv->head_time -
1038 aggpad->priv->tail_time;
1042 /* GstAggregator vmethods default implementations */
1044 gst_aggregator_default_sink_event (GstAggregator * self,
1045 GstAggregatorPad * aggpad, GstEvent * event)
1047 gboolean res = TRUE;
1048 GstPad *pad = GST_PAD (aggpad);
1049 GstAggregatorPrivate *priv = self->priv;
1051 switch (GST_EVENT_TYPE (event)) {
1052 case GST_EVENT_FLUSH_START:
1054 gst_aggregator_flush_start (self, aggpad, event);
1055 /* We forward only in one case: right after flush_seeking */
1059 case GST_EVENT_FLUSH_STOP:
1061 GST_DEBUG_OBJECT (aggpad, "Got FLUSH_STOP");
1063 gst_aggregator_pad_flush (aggpad, self);
1064 GST_OBJECT_LOCK (self);
1065 if (priv->flush_seeking) {
1066 g_atomic_int_set (&aggpad->priv->pending_flush_stop, FALSE);
1067 if (gst_aggregator_all_flush_stop_received_locked (self)) {
1068 GST_OBJECT_UNLOCK (self);
1069 /* That means we received FLUSH_STOP/FLUSH_STOP on
1070 * all sinkpads -- Seeking is Done... sending FLUSH_STOP */
1071 gst_aggregator_flush (self);
1072 gst_pad_push_event (self->srcpad, event);
1075 priv->send_eos = TRUE;
1076 SRC_BROADCAST (self);
1079 GST_INFO_OBJECT (self, "Releasing source pad STREAM_LOCK");
1080 GST_PAD_STREAM_UNLOCK (self->srcpad);
1081 gst_aggregator_start_srcpad_task (self);
1083 GST_OBJECT_UNLOCK (self);
1086 GST_OBJECT_UNLOCK (self);
1089 aggpad->priv->first_buffer = TRUE;
1091 /* We never forward the event */
1096 GST_DEBUG_OBJECT (aggpad, "EOS");
1098 /* We still have a buffer, and we don't want the subclass to have to
1099 * check for it. Mark pending_eos, eos will be set when steal_buffer is
1104 if (gst_aggregator_pad_queue_is_empty (aggpad)) {
1105 aggpad->priv->eos = TRUE;
1107 aggpad->priv->pending_eos = TRUE;
1109 PAD_UNLOCK (aggpad);
1111 SRC_BROADCAST (self);
1115 case GST_EVENT_SEGMENT:
1118 GST_OBJECT_LOCK (aggpad);
1119 gst_event_copy_segment (event, &aggpad->segment);
1120 update_time_level (aggpad, FALSE);
1121 GST_OBJECT_UNLOCK (aggpad);
1122 PAD_UNLOCK (aggpad);
1124 GST_OBJECT_LOCK (self);
1125 self->priv->seqnum = gst_event_get_seqnum (event);
1126 GST_OBJECT_UNLOCK (self);
1129 case GST_EVENT_STREAM_START:
1135 GstClockTime pts, endpts;
1136 GstClockTime duration;
1139 gst_event_parse_gap (event, &pts, &duration);
1140 gapbuf = gst_buffer_new ();
1142 if (GST_CLOCK_TIME_IS_VALID (duration))
1143 endpts = pts + duration;
1145 endpts = GST_CLOCK_TIME_NONE;
1147 GST_OBJECT_LOCK (aggpad);
1148 res = gst_segment_clip (&aggpad->segment, GST_FORMAT_TIME, pts, endpts,
1150 GST_OBJECT_UNLOCK (aggpad);
1153 GST_WARNING_OBJECT (self, "GAP event outside segment, dropping");
1157 if (GST_CLOCK_TIME_IS_VALID (endpts) && GST_CLOCK_TIME_IS_VALID (pts))
1158 duration = endpts - pts;
1160 duration = GST_CLOCK_TIME_NONE;
1162 GST_BUFFER_PTS (gapbuf) = pts;
1163 GST_BUFFER_DURATION (gapbuf) = duration;
1164 GST_BUFFER_FLAG_SET (gapbuf, GST_BUFFER_FLAG_GAP);
1165 GST_BUFFER_FLAG_SET (gapbuf, GST_BUFFER_FLAG_DROPPABLE);
1167 if (gst_aggregator_pad_chain_internal (self, aggpad, gapbuf, FALSE) !=
1169 GST_WARNING_OBJECT (self, "Failed to chain gap buffer");
1179 gst_event_parse_tag (event, &tags);
1181 if (gst_tag_list_get_scope (tags) == GST_TAG_SCOPE_STREAM) {
1182 gst_aggregator_merge_tags (self, tags, GST_TAG_MERGE_REPLACE);
1183 gst_event_unref (event);
1195 GST_DEBUG_OBJECT (pad, "Forwarding event: %" GST_PTR_FORMAT, event);
1196 return gst_pad_event_default (pad, GST_OBJECT (self), event);
1199 GST_DEBUG_OBJECT (pad, "Eating event: %" GST_PTR_FORMAT, event);
1201 gst_event_unref (event);
1206 static inline gboolean
1207 gst_aggregator_stop_pad (GstAggregator * self, GstAggregatorPad * pad,
1208 gpointer unused_udata)
1210 gst_aggregator_pad_flush (pad, self);
1216 gst_aggregator_stop (GstAggregator * agg)
1218 GstAggregatorClass *klass;
1221 gst_aggregator_reset_flow_values (agg);
1223 gst_aggregator_iterate_sinkpads (agg, gst_aggregator_stop_pad, NULL);
1225 klass = GST_AGGREGATOR_GET_CLASS (agg);
1228 result = klass->stop (agg);
1232 agg->priv->has_peer_latency = FALSE;
1233 agg->priv->peer_latency_live = FALSE;
1234 agg->priv->peer_latency_min = agg->priv->peer_latency_max = FALSE;
1236 if (agg->priv->tags)
1237 gst_tag_list_unref (agg->priv->tags);
1238 agg->priv->tags = NULL;
1243 /* GstElement vmethods implementations */
1244 static GstStateChangeReturn
1245 gst_aggregator_change_state (GstElement * element, GstStateChange transition)
1247 GstStateChangeReturn ret;
1248 GstAggregator *self = GST_AGGREGATOR (element);
1250 switch (transition) {
1251 case GST_STATE_CHANGE_READY_TO_PAUSED:
1252 if (!gst_aggregator_start (self))
1260 GST_ELEMENT_CLASS (aggregator_parent_class)->change_state (element,
1261 transition)) == GST_STATE_CHANGE_FAILURE)
1265 switch (transition) {
1266 case GST_STATE_CHANGE_PAUSED_TO_READY:
1267 if (!gst_aggregator_stop (self)) {
1268 /* What to do in this case? Error out? */
1269 GST_ERROR_OBJECT (self, "Subclass failed to stop.");
1281 GST_ERROR_OBJECT (element, "parent failed state change");
1286 GST_ERROR_OBJECT (element, "Subclass failed to start");
1287 return GST_STATE_CHANGE_FAILURE;
1292 gst_aggregator_release_pad (GstElement * element, GstPad * pad)
1294 GstAggregator *self = GST_AGGREGATOR (element);
1295 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1297 GST_INFO_OBJECT (pad, "Removing pad");
1300 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, TRUE);
1301 gst_element_remove_pad (element, pad);
1303 self->priv->has_peer_latency = FALSE;
1304 SRC_BROADCAST (self);
1308 static GstAggregatorPad *
1309 gst_aggregator_default_create_new_pad (GstAggregator * self,
1310 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
1312 GstAggregatorPad *agg_pad;
1313 GstAggregatorPrivate *priv = self->priv;
1317 if (templ->direction != GST_PAD_SINK ||
1318 g_strcmp0 (templ->name_template, "sink_%u") != 0)
1321 GST_OBJECT_LOCK (self);
1322 if (req_name == NULL || strlen (req_name) < 6
1323 || !g_str_has_prefix (req_name, "sink_")) {
1324 /* no name given when requesting the pad, use next available int */
1325 serial = ++priv->max_padserial;
1327 /* parse serial number from requested padname */
1328 serial = g_ascii_strtoull (&req_name[5], NULL, 10);
1329 if (serial > priv->max_padserial)
1330 priv->max_padserial = serial;
1333 name = g_strdup_printf ("sink_%u", serial);
1334 agg_pad = g_object_new (GST_AGGREGATOR_GET_CLASS (self)->sinkpads_type,
1335 "name", name, "direction", GST_PAD_SINK, "template", templ, NULL);
1338 GST_OBJECT_UNLOCK (self);
1345 GST_WARNING_OBJECT (self, "request new pad that is not a SINK pad\n");
1351 gst_aggregator_request_new_pad (GstElement * element,
1352 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
1354 GstAggregator *self;
1355 GstAggregatorPad *agg_pad;
1356 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (element);
1357 GstAggregatorPrivate *priv = GST_AGGREGATOR (element)->priv;
1359 self = GST_AGGREGATOR (element);
1361 agg_pad = klass->create_new_pad (self, templ, req_name, caps);
1363 GST_ERROR_OBJECT (element, "Couldn't create new pad");
1367 GST_DEBUG_OBJECT (element, "Adding pad %s", GST_PAD_NAME (agg_pad));
1368 self->priv->has_peer_latency = FALSE;
1371 gst_pad_set_active (GST_PAD (agg_pad), TRUE);
1373 /* add the pad to the element */
1374 gst_element_add_pad (element, GST_PAD (agg_pad));
1376 return GST_PAD (agg_pad);
1379 /* Must be called with SRC_LOCK held */
1382 gst_aggregator_query_latency_unlocked (GstAggregator * self, GstQuery * query)
1384 gboolean query_ret, live;
1385 GstClockTime our_latency, min, max;
1387 query_ret = gst_pad_query_default (self->srcpad, GST_OBJECT (self), query);
1390 GST_WARNING_OBJECT (self, "Latency query failed");
1394 gst_query_parse_latency (query, &live, &min, &max);
1396 our_latency = self->priv->latency;
1398 if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (min))) {
1399 GST_ERROR_OBJECT (self, "Invalid minimum latency %" GST_TIME_FORMAT
1400 ". Please file a bug at " PACKAGE_BUGREPORT ".", GST_TIME_ARGS (min));
1404 if (min > max && GST_CLOCK_TIME_IS_VALID (max)) {
1405 GST_ELEMENT_WARNING (self, CORE, CLOCK, (NULL),
1406 ("Impossible to configure latency: max %" GST_TIME_FORMAT " < min %"
1407 GST_TIME_FORMAT ". Add queues or other buffering elements.",
1408 GST_TIME_ARGS (max), GST_TIME_ARGS (min)));
1412 self->priv->peer_latency_live = live;
1413 self->priv->peer_latency_min = min;
1414 self->priv->peer_latency_max = max;
1415 self->priv->has_peer_latency = TRUE;
1419 min += self->priv->sub_latency_min;
1420 if (GST_CLOCK_TIME_IS_VALID (self->priv->sub_latency_max)
1421 && GST_CLOCK_TIME_IS_VALID (max))
1422 max += self->priv->sub_latency_max + our_latency;
1424 max = GST_CLOCK_TIME_NONE;
1426 SRC_BROADCAST (self);
1428 GST_DEBUG_OBJECT (self, "configured latency live:%s min:%" G_GINT64_FORMAT
1429 " max:%" G_GINT64_FORMAT, live ? "true" : "false", min, max);
1431 gst_query_set_latency (query, live, min, max);
1437 * MUST be called with the src_lock held.
1439 * See gst_aggregator_get_latency() for doc
1442 gst_aggregator_get_latency_unlocked (GstAggregator * self)
1444 GstClockTime latency;
1446 g_return_val_if_fail (GST_IS_AGGREGATOR (self), 0);
1448 if (!self->priv->has_peer_latency) {
1449 GstQuery *query = gst_query_new_latency ();
1452 ret = gst_aggregator_query_latency_unlocked (self, query);
1453 gst_query_unref (query);
1455 return GST_CLOCK_TIME_NONE;
1458 if (!self->priv->has_peer_latency || !self->priv->peer_latency_live)
1459 return GST_CLOCK_TIME_NONE;
1461 /* latency_min is never GST_CLOCK_TIME_NONE by construction */
1462 latency = self->priv->peer_latency_min;
1465 latency += self->priv->latency;
1466 latency += self->priv->sub_latency_min;
1472 * gst_aggregator_get_latency:
1473 * @self: a #GstAggregator
1475 * Retrieves the latency values reported by @self in response to the latency
1476 * query, or %GST_CLOCK_TIME_NONE if there is not live source connected and the element
1477 * will not wait for the clock.
1479 * Typically only called by subclasses.
1481 * Returns: The latency or %GST_CLOCK_TIME_NONE if the element does not sync
1484 gst_aggregator_get_latency (GstAggregator * self)
1489 ret = gst_aggregator_get_latency_unlocked (self);
1496 gst_aggregator_send_event (GstElement * element, GstEvent * event)
1498 GstAggregator *self = GST_AGGREGATOR (element);
1500 GST_STATE_LOCK (element);
1501 if (GST_EVENT_TYPE (event) == GST_EVENT_SEEK &&
1502 GST_STATE (element) < GST_STATE_PAUSED) {
1506 GstSeekType start_type, stop_type;
1509 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1510 &start, &stop_type, &stop);
1512 GST_OBJECT_LOCK (self);
1513 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
1514 stop_type, stop, NULL);
1515 self->priv->seqnum = gst_event_get_seqnum (event);
1516 self->priv->first_buffer = FALSE;
1517 GST_OBJECT_UNLOCK (self);
1519 GST_DEBUG_OBJECT (element, "Storing segment %" GST_PTR_FORMAT, event);
1521 GST_STATE_UNLOCK (element);
1524 return GST_ELEMENT_CLASS (aggregator_parent_class)->send_event (element,
1529 gst_aggregator_default_src_query (GstAggregator * self, GstQuery * query)
1531 gboolean res = TRUE;
1533 switch (GST_QUERY_TYPE (query)) {
1534 case GST_QUERY_SEEKING:
1538 /* don't pass it along as some (file)sink might claim it does
1539 * whereas with a collectpads in between that will not likely work */
1540 gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
1541 gst_query_set_seeking (query, format, FALSE, 0, -1);
1546 case GST_QUERY_LATENCY:
1548 res = gst_aggregator_query_latency_unlocked (self, query);
1552 return gst_pad_query_default (self->srcpad, GST_OBJECT (self), query);
1559 gst_aggregator_event_forward_func (GstPad * pad, gpointer user_data)
1561 EventData *evdata = user_data;
1562 gboolean ret = TRUE;
1563 GstPad *peer = gst_pad_get_peer (pad);
1564 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1567 if (evdata->only_to_active_pads && aggpad->priv->first_buffer) {
1568 GST_DEBUG_OBJECT (pad, "not sending event to inactive pad");
1571 ret = gst_pad_send_event (peer, gst_event_ref (evdata->event));
1572 GST_DEBUG_OBJECT (pad, "return of event push is %d", ret);
1573 gst_object_unref (peer);
1578 if (GST_EVENT_TYPE (evdata->event) == GST_EVENT_SEEK) {
1579 GstQuery *seeking = gst_query_new_seeking (GST_FORMAT_TIME);
1581 GST_DEBUG_OBJECT (pad, "Event %" GST_PTR_FORMAT " failed", evdata->event);
1583 if (gst_pad_query (peer, seeking)) {
1586 gst_query_parse_seeking (seeking, NULL, &seekable, NULL, NULL);
1588 if (seekable == FALSE) {
1589 GST_INFO_OBJECT (pad,
1590 "Source not seekable, We failed but it does not matter!");
1595 GST_ERROR_OBJECT (pad, "Query seeking FAILED");
1598 gst_query_unref (seeking);
1601 if (evdata->flush) {
1603 aggpad->priv->pending_flush_start = FALSE;
1604 aggpad->priv->pending_flush_stop = FALSE;
1605 PAD_UNLOCK (aggpad);
1608 evdata->one_actually_seeked = TRUE;
1611 evdata->result &= ret;
1613 /* Always send to all pads */
1618 gst_aggregator_forward_event_to_all_sinkpads (GstAggregator * self,
1619 GstEvent * event, gboolean flush, gboolean only_to_active_pads)
1623 evdata.event = event;
1624 evdata.result = TRUE;
1625 evdata.flush = flush;
1626 evdata.one_actually_seeked = FALSE;
1627 evdata.only_to_active_pads = only_to_active_pads;
1629 /* We first need to set all pads as flushing in a first pass
1630 * as flush_start flush_stop is sometimes sent synchronously
1631 * while we send the seek event */
1635 GST_OBJECT_LOCK (self);
1636 for (l = GST_ELEMENT_CAST (self)->sinkpads; l != NULL; l = l->next) {
1637 GstAggregatorPad *pad = l->data;
1640 pad->priv->pending_flush_start = TRUE;
1641 pad->priv->pending_flush_stop = FALSE;
1644 GST_OBJECT_UNLOCK (self);
1647 gst_pad_forward (self->srcpad, gst_aggregator_event_forward_func, &evdata);
1649 gst_event_unref (event);
1655 gst_aggregator_do_seek (GstAggregator * self, GstEvent * event)
1660 GstSeekType start_type, stop_type;
1664 GstAggregatorPrivate *priv = self->priv;
1666 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1667 &start, &stop_type, &stop);
1669 GST_INFO_OBJECT (self, "starting SEEK");
1671 flush = flags & GST_SEEK_FLAG_FLUSH;
1673 GST_OBJECT_LOCK (self);
1675 priv->pending_flush_start = TRUE;
1676 priv->flush_seeking = TRUE;
1679 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
1680 stop_type, stop, NULL);
1682 /* Seeking sets a position */
1683 self->priv->first_buffer = FALSE;
1684 GST_OBJECT_UNLOCK (self);
1686 /* forward the seek upstream */
1688 gst_aggregator_forward_event_to_all_sinkpads (self, event, flush, FALSE);
1691 if (!evdata.result || !evdata.one_actually_seeked) {
1692 GST_OBJECT_LOCK (self);
1693 priv->flush_seeking = FALSE;
1694 priv->pending_flush_start = FALSE;
1695 GST_OBJECT_UNLOCK (self);
1698 GST_INFO_OBJECT (self, "seek done, result: %d", evdata.result);
1700 return evdata.result;
1704 gst_aggregator_default_src_event (GstAggregator * self, GstEvent * event)
1707 gboolean res = TRUE;
1709 switch (GST_EVENT_TYPE (event)) {
1710 case GST_EVENT_SEEK:
1712 gst_event_ref (event);
1713 res = gst_aggregator_do_seek (self, event);
1714 gst_event_unref (event);
1718 case GST_EVENT_NAVIGATION:
1720 /* navigation is rather pointless. */
1722 gst_event_unref (event);
1731 /* Don't forward QOS events to pads that had no active buffer yet. Otherwise
1732 * they will receive a QOS event that has earliest_time=0 (because we can't
1733 * have negative timestamps), and consider their buffer as too late */
1735 gst_aggregator_forward_event_to_all_sinkpads (self, event, FALSE,
1736 GST_EVENT_TYPE (event) == GST_EVENT_QOS);
1737 res = evdata.result;
1744 gst_aggregator_src_pad_event_func (GstPad * pad, GstObject * parent,
1747 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
1749 return klass->src_event (GST_AGGREGATOR (parent), event);
1753 gst_aggregator_src_pad_query_func (GstPad * pad, GstObject * parent,
1756 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
1758 return klass->src_query (GST_AGGREGATOR (parent), query);
1762 gst_aggregator_src_pad_activate_mode_func (GstPad * pad,
1763 GstObject * parent, GstPadMode mode, gboolean active)
1765 GstAggregator *self = GST_AGGREGATOR (parent);
1766 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
1768 if (klass->src_activate) {
1769 if (klass->src_activate (self, mode, active) == FALSE) {
1774 if (active == TRUE) {
1776 case GST_PAD_MODE_PUSH:
1778 GST_INFO_OBJECT (pad, "Activating pad!");
1779 gst_aggregator_start_srcpad_task (self);
1784 GST_ERROR_OBJECT (pad, "Only supported mode is PUSH");
1791 GST_INFO_OBJECT (self, "Deactivating srcpad");
1792 gst_aggregator_stop_srcpad_task (self, FALSE);
1798 gst_aggregator_default_sink_query (GstAggregator * self,
1799 GstAggregatorPad * aggpad, GstQuery * query)
1801 GstPad *pad = GST_PAD (aggpad);
1803 return gst_pad_query_default (pad, GST_OBJECT (self), query);
1807 gst_aggregator_finalize (GObject * object)
1809 GstAggregator *self = (GstAggregator *) object;
1811 g_mutex_clear (&self->priv->src_lock);
1812 g_cond_clear (&self->priv->src_cond);
1814 G_OBJECT_CLASS (aggregator_parent_class)->finalize (object);
1818 * gst_aggregator_set_latency_property:
1819 * @agg: a #GstAggregator
1820 * @latency: the new latency value (in nanoseconds).
1822 * Sets the new latency value to @latency. This value is used to limit the
1823 * amount of time a pad waits for data to appear before considering the pad
1827 gst_aggregator_set_latency_property (GstAggregator * self, gint64 latency)
1831 g_return_if_fail (GST_IS_AGGREGATOR (self));
1832 g_return_if_fail (GST_CLOCK_TIME_IS_VALID (latency));
1835 changed = (self->priv->latency != latency);
1840 GST_OBJECT_LOCK (self);
1841 /* First lock all the pads */
1842 for (item = GST_ELEMENT_CAST (self)->sinkpads; item; item = item->next) {
1843 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
1847 self->priv->latency = latency;
1849 SRC_BROADCAST (self);
1851 /* Now wake up the pads */
1852 for (item = GST_ELEMENT_CAST (self)->sinkpads; item; item = item->next) {
1853 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
1854 PAD_BROADCAST_EVENT (aggpad);
1855 PAD_UNLOCK (aggpad);
1857 GST_OBJECT_UNLOCK (self);
1863 gst_element_post_message (GST_ELEMENT_CAST (self),
1864 gst_message_new_latency (GST_OBJECT_CAST (self)));
1868 * gst_aggregator_get_latency_property:
1869 * @agg: a #GstAggregator
1871 * Gets the latency value. See gst_aggregator_set_latency for
1874 * Returns: The time in nanoseconds to wait for data to arrive on a sink pad
1875 * before a pad is deemed unresponsive. A value of -1 means an
1879 gst_aggregator_get_latency_property (GstAggregator * agg)
1883 g_return_val_if_fail (GST_IS_AGGREGATOR (agg), -1);
1885 GST_OBJECT_LOCK (agg);
1886 res = agg->priv->latency;
1887 GST_OBJECT_UNLOCK (agg);
1893 gst_aggregator_set_property (GObject * object, guint prop_id,
1894 const GValue * value, GParamSpec * pspec)
1896 GstAggregator *agg = GST_AGGREGATOR (object);
1900 gst_aggregator_set_latency_property (agg, g_value_get_int64 (value));
1902 case PROP_START_TIME_SELECTION:
1903 agg->priv->start_time_selection = g_value_get_enum (value);
1905 case PROP_START_TIME:
1906 agg->priv->start_time = g_value_get_uint64 (value);
1909 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1915 gst_aggregator_get_property (GObject * object, guint prop_id,
1916 GValue * value, GParamSpec * pspec)
1918 GstAggregator *agg = GST_AGGREGATOR (object);
1922 g_value_set_int64 (value, gst_aggregator_get_latency_property (agg));
1924 case PROP_START_TIME_SELECTION:
1925 g_value_set_enum (value, agg->priv->start_time_selection);
1927 case PROP_START_TIME:
1928 g_value_set_uint64 (value, agg->priv->start_time);
1931 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1936 /* GObject vmethods implementations */
1938 gst_aggregator_class_init (GstAggregatorClass * klass)
1940 GObjectClass *gobject_class = (GObjectClass *) klass;
1941 GstElementClass *gstelement_class = (GstElementClass *) klass;
1943 aggregator_parent_class = g_type_class_peek_parent (klass);
1944 g_type_class_add_private (klass, sizeof (GstAggregatorPrivate));
1946 GST_DEBUG_CATEGORY_INIT (aggregator_debug, "aggregator",
1947 GST_DEBUG_FG_MAGENTA, "GstAggregator");
1949 klass->sinkpads_type = GST_TYPE_AGGREGATOR_PAD;
1951 klass->sink_event = gst_aggregator_default_sink_event;
1952 klass->sink_query = gst_aggregator_default_sink_query;
1954 klass->src_event = gst_aggregator_default_src_event;
1955 klass->src_query = gst_aggregator_default_src_query;
1957 klass->create_new_pad = gst_aggregator_default_create_new_pad;
1959 gstelement_class->request_new_pad =
1960 GST_DEBUG_FUNCPTR (gst_aggregator_request_new_pad);
1961 gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_aggregator_send_event);
1962 gstelement_class->release_pad =
1963 GST_DEBUG_FUNCPTR (gst_aggregator_release_pad);
1964 gstelement_class->change_state =
1965 GST_DEBUG_FUNCPTR (gst_aggregator_change_state);
1967 gobject_class->set_property = gst_aggregator_set_property;
1968 gobject_class->get_property = gst_aggregator_get_property;
1969 gobject_class->finalize = gst_aggregator_finalize;
1971 g_object_class_install_property (gobject_class, PROP_LATENCY,
1972 g_param_spec_int64 ("latency", "Buffer latency",
1973 "Additional latency in live mode to allow upstream "
1974 "to take longer to produce buffers for the current "
1975 "position (in nanoseconds)", 0,
1976 (G_MAXLONG == G_MAXINT64) ? G_MAXINT64 : (G_MAXLONG * GST_SECOND - 1),
1977 DEFAULT_LATENCY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1979 g_object_class_install_property (gobject_class, PROP_START_TIME_SELECTION,
1980 g_param_spec_enum ("start-time-selection", "Start Time Selection",
1981 "Decides which start time is output",
1982 gst_aggregator_start_time_selection_get_type (),
1983 DEFAULT_START_TIME_SELECTION,
1984 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1986 g_object_class_install_property (gobject_class, PROP_START_TIME,
1987 g_param_spec_uint64 ("start-time", "Start Time",
1988 "Start time to use if start-time-selection=set", 0,
1990 DEFAULT_START_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1992 GST_DEBUG_REGISTER_FUNCPTR (gst_aggregator_stop_pad);
1996 gst_aggregator_init (GstAggregator * self, GstAggregatorClass * klass)
1998 GstPadTemplate *pad_template;
1999 GstAggregatorPrivate *priv;
2001 g_return_if_fail (klass->aggregate != NULL);
2004 G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_AGGREGATOR,
2005 GstAggregatorPrivate);
2010 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "src");
2011 g_return_if_fail (pad_template != NULL);
2013 priv->max_padserial = -1;
2014 priv->tags_changed = FALSE;
2016 self->priv->peer_latency_live = FALSE;
2017 self->priv->peer_latency_min = self->priv->sub_latency_min = 0;
2018 self->priv->peer_latency_max = self->priv->sub_latency_max = 0;
2019 self->priv->has_peer_latency = FALSE;
2020 gst_aggregator_reset_flow_values (self);
2022 self->srcpad = gst_pad_new_from_template (pad_template, "src");
2024 gst_pad_set_event_function (self->srcpad,
2025 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_event_func));
2026 gst_pad_set_query_function (self->srcpad,
2027 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_query_func));
2028 gst_pad_set_activatemode_function (self->srcpad,
2029 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_activate_mode_func));
2031 gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
2033 self->priv->latency = DEFAULT_LATENCY;
2034 self->priv->start_time_selection = DEFAULT_START_TIME_SELECTION;
2035 self->priv->start_time = DEFAULT_START_TIME;
2037 g_mutex_init (&self->priv->src_lock);
2038 g_cond_init (&self->priv->src_cond);
2041 /* we can't use G_DEFINE_ABSTRACT_TYPE because we need the klass in the _init
2042 * method to get to the padtemplates */
2044 gst_aggregator_get_type (void)
2046 static volatile gsize type = 0;
2048 if (g_once_init_enter (&type)) {
2050 static const GTypeInfo info = {
2051 sizeof (GstAggregatorClass),
2054 (GClassInitFunc) gst_aggregator_class_init,
2057 sizeof (GstAggregator),
2059 (GInstanceInitFunc) gst_aggregator_init,
2062 _type = g_type_register_static (GST_TYPE_ELEMENT,
2063 "GstAggregator", &info, G_TYPE_FLAG_ABSTRACT);
2064 g_once_init_leave (&type, _type);
2069 /* Must be called with SRC lock and PAD lock held */
2071 gst_aggregator_pad_has_space (GstAggregator * self, GstAggregatorPad * aggpad)
2073 /* Empty queue always has space */
2074 if (g_queue_get_length (&aggpad->priv->buffers) == 0)
2077 /* We also want at least two buffers, one is being processed and one is ready
2078 * for the next iteration when we operate in live mode. */
2079 if (self->priv->peer_latency_live && aggpad->priv->num_buffers < 2)
2082 /* zero latency, if there is a buffer, it's full */
2083 if (self->priv->latency == 0)
2086 /* Allow no more buffers than the latency */
2087 return (aggpad->priv->time_level <= self->priv->latency);
2090 /* Must be called with the PAD_LOCK held */
2092 apply_buffer (GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head)
2094 GstClockTime timestamp;
2096 if (GST_BUFFER_DTS_IS_VALID (buffer))
2097 timestamp = GST_BUFFER_DTS (buffer);
2099 timestamp = GST_BUFFER_PTS (buffer);
2101 if (timestamp == GST_CLOCK_TIME_NONE) {
2103 timestamp = aggpad->priv->head_position;
2105 timestamp = aggpad->priv->tail_position;
2109 if (GST_BUFFER_DURATION_IS_VALID (buffer))
2110 timestamp += GST_BUFFER_DURATION (buffer);
2113 aggpad->priv->head_position = timestamp;
2115 aggpad->priv->tail_position = timestamp;
2117 update_time_level (aggpad, head);
2120 static GstFlowReturn
2121 gst_aggregator_pad_chain_internal (GstAggregator * self,
2122 GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head)
2124 GstBuffer *actual_buf = buffer;
2125 GstAggregatorClass *aggclass = GST_AGGREGATOR_GET_CLASS (self);
2126 GstFlowReturn flow_return;
2127 GstClockTime buf_pts;
2129 GST_DEBUG_OBJECT (aggpad, "Start chaining a buffer %" GST_PTR_FORMAT, buffer);
2131 PAD_FLUSH_LOCK (aggpad);
2134 flow_return = aggpad->priv->flow_return;
2135 if (flow_return != GST_FLOW_OK)
2138 if (aggpad->priv->pending_eos == TRUE)
2141 PAD_UNLOCK (aggpad);
2143 if (aggclass->clip && head) {
2144 aggclass->clip (self, aggpad, buffer, &actual_buf);
2147 if (actual_buf == NULL) {
2148 GST_LOG_OBJECT (actual_buf, "Buffer dropped by clip function");
2152 buf_pts = GST_BUFFER_PTS (actual_buf);
2154 aggpad->priv->first_buffer = FALSE;
2158 GST_OBJECT_LOCK (self);
2160 if (gst_aggregator_pad_has_space (self, aggpad)
2161 && aggpad->priv->flow_return == GST_FLOW_OK) {
2163 g_queue_push_head (&aggpad->priv->buffers, actual_buf);
2165 g_queue_push_tail (&aggpad->priv->buffers, actual_buf);
2166 apply_buffer (aggpad, actual_buf, head);
2167 aggpad->priv->num_buffers++;
2168 actual_buf = buffer = NULL;
2169 SRC_BROADCAST (self);
2173 flow_return = aggpad->priv->flow_return;
2174 if (flow_return != GST_FLOW_OK) {
2175 GST_OBJECT_UNLOCK (self);
2179 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
2180 GST_OBJECT_UNLOCK (self);
2182 PAD_WAIT_EVENT (aggpad);
2184 PAD_UNLOCK (aggpad);
2187 if (self->priv->first_buffer) {
2188 GstClockTime start_time;
2190 switch (self->priv->start_time_selection) {
2191 case GST_AGGREGATOR_START_TIME_SELECTION_ZERO:
2195 case GST_AGGREGATOR_START_TIME_SELECTION_FIRST:
2196 GST_OBJECT_LOCK (aggpad);
2197 if (aggpad->segment.format == GST_FORMAT_TIME) {
2198 start_time = buf_pts;
2199 if (start_time != -1) {
2200 start_time = MAX (start_time, aggpad->segment.start);
2202 gst_segment_to_running_time (&aggpad->segment, GST_FORMAT_TIME,
2207 GST_WARNING_OBJECT (aggpad,
2208 "Ignoring request of selecting the first start time "
2209 "as the segment is a %s segment instead of a time segment",
2210 gst_format_get_name (aggpad->segment.format));
2212 GST_OBJECT_UNLOCK (aggpad);
2214 case GST_AGGREGATOR_START_TIME_SELECTION_SET:
2215 start_time = self->priv->start_time;
2216 if (start_time == -1)
2221 if (start_time != -1) {
2222 if (self->segment.position == -1)
2223 self->segment.position = start_time;
2225 self->segment.position = MIN (start_time, self->segment.position);
2227 GST_DEBUG_OBJECT (self, "Selecting start time %" GST_TIME_FORMAT,
2228 GST_TIME_ARGS (start_time));
2232 PAD_UNLOCK (aggpad);
2233 GST_OBJECT_UNLOCK (self);
2238 PAD_FLUSH_UNLOCK (aggpad);
2240 GST_DEBUG_OBJECT (aggpad, "Done chaining");
2245 PAD_UNLOCK (aggpad);
2246 PAD_FLUSH_UNLOCK (aggpad);
2248 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping buffer",
2249 gst_flow_get_name (flow_return));
2251 gst_buffer_unref (buffer);
2256 PAD_UNLOCK (aggpad);
2257 PAD_FLUSH_UNLOCK (aggpad);
2259 gst_buffer_unref (buffer);
2260 GST_DEBUG_OBJECT (aggpad, "We are EOS already...");
2262 return GST_FLOW_EOS;
2265 static GstFlowReturn
2266 gst_aggregator_pad_chain (GstPad * pad, GstObject * object, GstBuffer * buffer)
2268 return gst_aggregator_pad_chain_internal (GST_AGGREGATOR_CAST (object),
2269 GST_AGGREGATOR_PAD_CAST (pad), buffer, TRUE);
2273 gst_aggregator_pad_query_func (GstPad * pad, GstObject * parent,
2276 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2277 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2279 if (GST_QUERY_IS_SERIALIZED (query)) {
2282 while (!gst_aggregator_pad_queue_is_empty (aggpad)
2283 && aggpad->priv->flow_return == GST_FLOW_OK) {
2284 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
2285 PAD_WAIT_EVENT (aggpad);
2288 if (aggpad->priv->flow_return != GST_FLOW_OK)
2291 PAD_UNLOCK (aggpad);
2294 return klass->sink_query (GST_AGGREGATOR (parent),
2295 GST_AGGREGATOR_PAD (pad), query);
2298 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping query",
2299 gst_flow_get_name (aggpad->priv->flow_return));
2300 PAD_UNLOCK (aggpad);
2305 gst_aggregator_pad_event_func (GstPad * pad, GstObject * parent,
2308 GstAggregator *self = GST_AGGREGATOR (parent);
2309 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2310 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2312 if (GST_EVENT_IS_SERIALIZED (event) && GST_EVENT_TYPE (event) != GST_EVENT_EOS
2313 /* && GST_EVENT_TYPE (event) != GST_EVENT_SEGMENT_DONE */ ) {
2317 if (aggpad->priv->flow_return != GST_FLOW_OK
2318 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP)
2321 if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
2322 GST_OBJECT_LOCK (aggpad);
2323 gst_event_copy_segment (event, &aggpad->clip_segment);
2324 aggpad->priv->head_position = aggpad->clip_segment.position;
2325 update_time_level (aggpad, TRUE);
2326 GST_OBJECT_UNLOCK (aggpad);
2329 if (!gst_aggregator_pad_queue_is_empty (aggpad) &&
2330 GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
2331 GST_DEBUG_OBJECT (aggpad, "Store event in queue: %" GST_PTR_FORMAT,
2333 g_queue_push_head (&aggpad->priv->buffers, event);
2335 SRC_BROADCAST (self);
2337 PAD_UNLOCK (aggpad);
2342 return klass->sink_event (self, aggpad, event);
2347 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping event",
2348 gst_flow_get_name (aggpad->priv->flow_return));
2349 PAD_UNLOCK (aggpad);
2351 if (GST_EVENT_IS_STICKY (event))
2352 gst_pad_store_sticky_event (pad, event);
2353 gst_event_unref (event);
2358 gst_aggregator_pad_activate_mode_func (GstPad * pad,
2359 GstObject * parent, GstPadMode mode, gboolean active)
2361 GstAggregator *self = GST_AGGREGATOR (parent);
2362 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2364 if (active == FALSE) {
2366 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, TRUE);
2367 SRC_BROADCAST (self);
2371 aggpad->priv->flow_return = GST_FLOW_OK;
2372 PAD_BROADCAST_EVENT (aggpad);
2373 PAD_UNLOCK (aggpad);
2379 /***********************************
2380 * GstAggregatorPad implementation *
2381 ************************************/
2382 G_DEFINE_TYPE (GstAggregatorPad, gst_aggregator_pad, GST_TYPE_PAD);
2385 gst_aggregator_pad_constructed (GObject * object)
2387 GstPad *pad = GST_PAD (object);
2389 gst_pad_set_chain_function (pad,
2390 GST_DEBUG_FUNCPTR (gst_aggregator_pad_chain));
2391 gst_pad_set_event_function (pad,
2392 GST_DEBUG_FUNCPTR (gst_aggregator_pad_event_func));
2393 gst_pad_set_query_function (pad,
2394 GST_DEBUG_FUNCPTR (gst_aggregator_pad_query_func));
2395 gst_pad_set_activatemode_function (pad,
2396 GST_DEBUG_FUNCPTR (gst_aggregator_pad_activate_mode_func));
2400 gst_aggregator_pad_finalize (GObject * object)
2402 GstAggregatorPad *pad = (GstAggregatorPad *) object;
2404 g_cond_clear (&pad->priv->event_cond);
2405 g_mutex_clear (&pad->priv->flush_lock);
2406 g_mutex_clear (&pad->priv->lock);
2408 G_OBJECT_CLASS (gst_aggregator_pad_parent_class)->finalize (object);
2412 gst_aggregator_pad_dispose (GObject * object)
2414 GstAggregatorPad *pad = (GstAggregatorPad *) object;
2416 gst_aggregator_pad_set_flushing (pad, GST_FLOW_FLUSHING, TRUE);
2418 G_OBJECT_CLASS (gst_aggregator_pad_parent_class)->dispose (object);
2422 gst_aggregator_pad_class_init (GstAggregatorPadClass * klass)
2424 GObjectClass *gobject_class = (GObjectClass *) klass;
2426 g_type_class_add_private (klass, sizeof (GstAggregatorPadPrivate));
2428 gobject_class->constructed = gst_aggregator_pad_constructed;
2429 gobject_class->finalize = gst_aggregator_pad_finalize;
2430 gobject_class->dispose = gst_aggregator_pad_dispose;
2434 gst_aggregator_pad_init (GstAggregatorPad * pad)
2437 G_TYPE_INSTANCE_GET_PRIVATE (pad, GST_TYPE_AGGREGATOR_PAD,
2438 GstAggregatorPadPrivate);
2440 g_queue_init (&pad->priv->buffers);
2441 g_cond_init (&pad->priv->event_cond);
2443 g_mutex_init (&pad->priv->flush_lock);
2444 g_mutex_init (&pad->priv->lock);
2446 pad->priv->first_buffer = TRUE;
2450 * gst_aggregator_pad_steal_buffer:
2451 * @pad: the pad to get buffer from
2453 * Steal the ref to the buffer currently queued in @pad.
2455 * Returns: (transfer full): The buffer in @pad or NULL if no buffer was
2456 * queued. You should unref the buffer after usage.
2459 gst_aggregator_pad_steal_buffer (GstAggregatorPad * pad)
2461 GstBuffer *buffer = NULL;
2464 if (GST_IS_BUFFER (g_queue_peek_tail (&pad->priv->buffers)))
2465 buffer = g_queue_pop_tail (&pad->priv->buffers);
2468 apply_buffer (pad, buffer, FALSE);
2469 pad->priv->num_buffers--;
2470 GST_TRACE_OBJECT (pad, "Consuming buffer");
2471 if (gst_aggregator_pad_queue_is_empty (pad) && pad->priv->pending_eos) {
2472 pad->priv->pending_eos = FALSE;
2473 pad->priv->eos = TRUE;
2475 PAD_BROADCAST_EVENT (pad);
2476 GST_DEBUG_OBJECT (pad, "Consumed: %" GST_PTR_FORMAT, buffer);
2484 * gst_aggregator_pad_drop_buffer:
2485 * @pad: the pad where to drop any pending buffer
2487 * Drop the buffer currently queued in @pad.
2489 * Returns: TRUE if there was a buffer queued in @pad, or FALSE if not.
2492 gst_aggregator_pad_drop_buffer (GstAggregatorPad * pad)
2496 buf = gst_aggregator_pad_steal_buffer (pad);
2501 gst_buffer_unref (buf);
2506 * gst_aggregator_pad_get_buffer:
2507 * @pad: the pad to get buffer from
2509 * Returns: (transfer full): A reference to the buffer in @pad or
2510 * NULL if no buffer was queued. You should unref the buffer after
2514 gst_aggregator_pad_get_buffer (GstAggregatorPad * pad)
2516 GstBuffer *buffer = NULL;
2519 buffer = g_queue_peek_tail (&pad->priv->buffers);
2520 /* The tail should always be a buffer, because if it is an event,
2521 * it will be consumed immeditaly in gst_aggregator_steal_buffer */
2523 if (GST_IS_BUFFER (buffer))
2524 gst_buffer_ref (buffer);
2533 gst_aggregator_pad_is_eos (GstAggregatorPad * pad)
2538 is_eos = pad->priv->eos;
2545 * gst_aggregator_merge_tags:
2546 * @self: a #GstAggregator
2547 * @tags: a #GstTagList to merge
2548 * @mode: the #GstTagMergeMode to use
2550 * Adds tags to so-called pending tags, which will be processed
2551 * before pushing out data downstream.
2553 * Note that this is provided for convenience, and the subclass is
2554 * not required to use this and can still do tag handling on its own.
2559 gst_aggregator_merge_tags (GstAggregator * self,
2560 const GstTagList * tags, GstTagMergeMode mode)
2564 g_return_if_fail (GST_IS_AGGREGATOR (self));
2565 g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
2567 /* FIXME Check if we can use OBJECT lock here! */
2568 GST_OBJECT_LOCK (self);
2570 GST_DEBUG_OBJECT (self, "merging tags %" GST_PTR_FORMAT, tags);
2571 otags = self->priv->tags;
2572 self->priv->tags = gst_tag_list_merge (self->priv->tags, tags, mode);
2574 gst_tag_list_unref (otags);
2575 self->priv->tags_changed = TRUE;
2576 GST_OBJECT_UNLOCK (self);
2580 * gst_aggregator_set_latency:
2581 * @self: a #GstAggregator
2582 * @min_latency: minimum latency
2583 * @max_latency: maximum latency
2585 * Lets #GstAggregator sub-classes tell the baseclass what their internal
2586 * latency is. Will also post a LATENCY message on the bus so the pipeline
2587 * can reconfigure its global latency.
2590 gst_aggregator_set_latency (GstAggregator * self,
2591 GstClockTime min_latency, GstClockTime max_latency)
2593 gboolean changed = FALSE;
2595 g_return_if_fail (GST_IS_AGGREGATOR (self));
2596 g_return_if_fail (GST_CLOCK_TIME_IS_VALID (min_latency));
2597 g_return_if_fail (max_latency >= min_latency);
2600 if (self->priv->sub_latency_min != min_latency) {
2601 self->priv->sub_latency_min = min_latency;
2604 if (self->priv->sub_latency_max != max_latency) {
2605 self->priv->sub_latency_max = max_latency;
2610 SRC_BROADCAST (self);
2614 gst_element_post_message (GST_ELEMENT_CAST (self),
2615 gst_message_new_latency (GST_OBJECT_CAST (self)));