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;
215 GstBuffer *clipped_buffer;
217 GstClockTime head_position;
218 GstClockTime tail_position;
219 GstClockTime head_time;
220 GstClockTime tail_time;
221 GstClockTime time_level;
222 GstSegment head_segment; /* segment before the queue */
228 /* This lock prevents a flush start processing happening while
229 * the chain function is also happening.
234 /* Must be called with PAD_LOCK held */
236 gst_aggregator_pad_reset_unlocked (GstAggregatorPad * aggpad)
238 aggpad->priv->pending_eos = FALSE;
239 aggpad->priv->eos = FALSE;
240 aggpad->priv->flow_return = GST_FLOW_OK;
241 GST_OBJECT_LOCK (aggpad);
242 gst_segment_init (&aggpad->segment, GST_FORMAT_UNDEFINED);
243 gst_segment_init (&aggpad->priv->head_segment, GST_FORMAT_UNDEFINED);
244 GST_OBJECT_UNLOCK (aggpad);
245 aggpad->priv->head_position = GST_CLOCK_TIME_NONE;
246 aggpad->priv->tail_position = GST_CLOCK_TIME_NONE;
247 aggpad->priv->head_time = GST_CLOCK_TIME_NONE;
248 aggpad->priv->tail_time = GST_CLOCK_TIME_NONE;
249 aggpad->priv->time_level = 0;
250 aggpad->priv->first_buffer = TRUE;
254 gst_aggregator_pad_flush (GstAggregatorPad * aggpad, GstAggregator * agg)
256 GstAggregatorPadClass *klass = GST_AGGREGATOR_PAD_GET_CLASS (aggpad);
259 gst_aggregator_pad_reset_unlocked (aggpad);
263 return klass->flush (aggpad, agg);
268 /*************************************
269 * GstAggregator implementation *
270 *************************************/
271 static GstElementClass *aggregator_parent_class = NULL;
273 /* All members are protected by the object lock unless otherwise noted */
275 struct _GstAggregatorPrivate
279 /* Our state is >= PAUSED */
280 gboolean running; /* protected by src_lock */
283 gboolean send_stream_start; /* protected by srcpad stream lock */
284 gboolean send_segment;
285 gboolean flush_seeking;
286 gboolean pending_flush_start;
287 gboolean send_eos; /* protected by srcpad stream lock */
289 GstCaps *srccaps; /* protected by the srcpad stream lock */
292 gboolean tags_changed;
294 gboolean peer_latency_live; /* protected by src_lock */
295 GstClockTime peer_latency_min; /* protected by src_lock */
296 GstClockTime peer_latency_max; /* protected by src_lock */
297 gboolean has_peer_latency; /* protected by src_lock */
299 GstClockTime sub_latency_min; /* protected by src_lock */
300 GstClockTime sub_latency_max; /* protected by src_lock */
303 GstClockID aggregate_id; /* protected by src_lock */
307 gboolean first_buffer; /* protected by object lock */
308 GstAggregatorStartTimeSelection start_time_selection;
309 GstClockTime start_time;
312 gint64 latency; /* protected by both src_lock and all pad locks */
320 gboolean only_to_active_pads;
322 gboolean one_actually_seeked;
325 #define DEFAULT_LATENCY 0
326 #define DEFAULT_START_TIME_SELECTION GST_AGGREGATOR_START_TIME_SELECTION_ZERO
327 #define DEFAULT_START_TIME (-1)
333 PROP_START_TIME_SELECTION,
338 static GstFlowReturn gst_aggregator_pad_chain_internal (GstAggregator * self,
339 GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head);
342 * gst_aggregator_iterate_sinkpads:
343 * @self: The #GstAggregator
344 * @func: (scope call): The function to call.
345 * @user_data: (closure): The data to pass to @func.
347 * Iterate the sinkpads of aggregator to call a function on them.
349 * This method guarantees that @func will be called only once for each
353 gst_aggregator_iterate_sinkpads (GstAggregator * self,
354 GstAggregatorPadForeachFunc func, gpointer user_data)
356 gboolean result = FALSE;
358 gboolean done = FALSE;
359 GValue item = { 0, };
360 GList *seen_pads = NULL;
362 iter = gst_element_iterate_sink_pads (GST_ELEMENT (self));
368 switch (gst_iterator_next (iter, &item)) {
369 case GST_ITERATOR_OK:
371 GstAggregatorPad *pad;
373 pad = g_value_get_object (&item);
375 /* if already pushed, skip. FIXME, find something faster to tag pads */
376 if (pad == NULL || g_list_find (seen_pads, pad)) {
377 g_value_reset (&item);
381 GST_LOG_OBJECT (pad, "calling function %s on pad",
382 GST_DEBUG_FUNCPTR_NAME (func));
384 result = func (self, pad, user_data);
388 seen_pads = g_list_prepend (seen_pads, pad);
390 g_value_reset (&item);
393 case GST_ITERATOR_RESYNC:
394 gst_iterator_resync (iter);
396 case GST_ITERATOR_ERROR:
397 GST_ERROR_OBJECT (self,
398 "Could not iterate over internally linked pads");
401 case GST_ITERATOR_DONE:
406 g_value_unset (&item);
407 gst_iterator_free (iter);
409 if (seen_pads == NULL) {
410 GST_DEBUG_OBJECT (self, "No pad seen");
414 g_list_free (seen_pads);
421 gst_aggregator_pad_queue_is_empty (GstAggregatorPad * pad)
423 return (g_queue_peek_tail (&pad->priv->buffers) == NULL &&
424 pad->priv->clipped_buffer == NULL);
428 gst_aggregator_check_pads_ready (GstAggregator * self)
430 GstAggregatorPad *pad;
432 gboolean have_buffer = TRUE;
433 gboolean have_event = FALSE;
435 GST_LOG_OBJECT (self, "checking pads");
437 GST_OBJECT_LOCK (self);
439 sinkpads = GST_ELEMENT_CAST (self)->sinkpads;
440 if (sinkpads == NULL)
443 for (l = sinkpads; l != NULL; l = l->next) {
448 if (pad->priv->num_buffers == 0) {
449 if (!gst_aggregator_pad_queue_is_empty (pad))
451 if (!pad->priv->eos) {
454 /* If not live we need data on all pads, so leave the loop */
455 if (!self->priv->peer_latency_live) {
460 } else if (self->priv->peer_latency_live) {
461 /* In live mode, having a single pad with buffers is enough to
462 * generate a start time from it. In non-live mode all pads need
465 self->priv->first_buffer = FALSE;
471 if (!have_buffer && !have_event)
475 self->priv->first_buffer = FALSE;
477 GST_OBJECT_UNLOCK (self);
478 GST_LOG_OBJECT (self, "pads are ready");
483 GST_LOG_OBJECT (self, "pads not ready: no sink pads");
484 GST_OBJECT_UNLOCK (self);
490 GST_LOG_OBJECT (pad, "pad not ready to be aggregated yet,"
491 " but waking up for serialized event");
493 GST_LOG_OBJECT (pad, "pad not ready to be aggregated yet");
494 GST_OBJECT_UNLOCK (self);
500 gst_aggregator_reset_flow_values (GstAggregator * self)
502 GST_OBJECT_LOCK (self);
503 self->priv->send_stream_start = TRUE;
504 self->priv->send_segment = TRUE;
505 gst_segment_init (&self->segment, GST_FORMAT_TIME);
506 self->priv->first_buffer = TRUE;
507 GST_OBJECT_UNLOCK (self);
511 gst_aggregator_push_mandatory_events (GstAggregator * self)
513 GstAggregatorPrivate *priv = self->priv;
514 GstEvent *segment = NULL;
515 GstEvent *tags = NULL;
517 if (self->priv->send_stream_start) {
520 GST_INFO_OBJECT (self, "pushing stream start");
521 /* stream-start (FIXME: create id based on input ids) */
522 g_snprintf (s_id, sizeof (s_id), "agg-%08x", g_random_int ());
523 if (!gst_pad_push_event (self->srcpad, gst_event_new_stream_start (s_id))) {
524 GST_WARNING_OBJECT (self->srcpad, "Sending stream start event failed");
526 self->priv->send_stream_start = FALSE;
529 if (self->priv->srccaps) {
531 GST_INFO_OBJECT (self, "pushing caps: %" GST_PTR_FORMAT,
532 self->priv->srccaps);
533 if (!gst_pad_push_event (self->srcpad,
534 gst_event_new_caps (self->priv->srccaps))) {
535 GST_WARNING_OBJECT (self->srcpad, "Sending caps event failed");
537 gst_caps_unref (self->priv->srccaps);
538 self->priv->srccaps = NULL;
541 GST_OBJECT_LOCK (self);
542 if (self->priv->send_segment && !self->priv->flush_seeking) {
543 segment = gst_event_new_segment (&self->segment);
545 if (!self->priv->seqnum)
546 self->priv->seqnum = gst_event_get_seqnum (segment);
548 gst_event_set_seqnum (segment, self->priv->seqnum);
549 self->priv->send_segment = FALSE;
551 GST_DEBUG_OBJECT (self, "pushing segment %" GST_PTR_FORMAT, segment);
554 if (priv->tags && priv->tags_changed && !self->priv->flush_seeking) {
555 tags = gst_event_new_tag (gst_tag_list_ref (priv->tags));
556 priv->tags_changed = FALSE;
558 GST_OBJECT_UNLOCK (self);
561 gst_pad_push_event (self->srcpad, segment);
563 gst_pad_push_event (self->srcpad, tags);
568 * gst_aggregator_set_src_caps:
569 * @self: The #GstAggregator
570 * @caps: The #GstCaps to set on the src pad.
572 * Sets the caps to be used on the src pad.
575 gst_aggregator_set_src_caps (GstAggregator * self, GstCaps * caps)
577 GST_PAD_STREAM_LOCK (self->srcpad);
578 gst_caps_replace (&self->priv->srccaps, caps);
579 gst_aggregator_push_mandatory_events (self);
580 GST_PAD_STREAM_UNLOCK (self->srcpad);
584 * gst_aggregator_finish_buffer:
585 * @self: The #GstAggregator
586 * @buffer: (transfer full): the #GstBuffer to push.
588 * This method will push the provided output buffer downstream. If needed,
589 * mandatory events such as stream-start, caps, and segment events will be
590 * sent before pushing the buffer.
593 gst_aggregator_finish_buffer (GstAggregator * self, GstBuffer * buffer)
595 gst_aggregator_push_mandatory_events (self);
597 GST_OBJECT_LOCK (self);
598 if (!self->priv->flush_seeking && gst_pad_is_active (self->srcpad)) {
599 GST_TRACE_OBJECT (self, "pushing buffer %" GST_PTR_FORMAT, buffer);
600 GST_OBJECT_UNLOCK (self);
601 return gst_pad_push (self->srcpad, buffer);
603 GST_INFO_OBJECT (self, "Not pushing (active: %i, flushing: %i)",
604 self->priv->flush_seeking, gst_pad_is_active (self->srcpad));
605 GST_OBJECT_UNLOCK (self);
606 gst_buffer_unref (buffer);
612 gst_aggregator_push_eos (GstAggregator * self)
615 gst_aggregator_push_mandatory_events (self);
617 event = gst_event_new_eos ();
619 GST_OBJECT_LOCK (self);
620 self->priv->send_eos = FALSE;
621 gst_event_set_seqnum (event, self->priv->seqnum);
622 GST_OBJECT_UNLOCK (self);
624 gst_pad_push_event (self->srcpad, event);
628 gst_aggregator_get_next_time (GstAggregator * self)
630 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
632 if (klass->get_next_time)
633 return klass->get_next_time (self);
635 return GST_CLOCK_TIME_NONE;
639 gst_aggregator_wait_and_check (GstAggregator * self, gboolean * timeout)
641 GstClockTime latency;
649 latency = gst_aggregator_get_latency_unlocked (self);
651 if (gst_aggregator_check_pads_ready (self)) {
652 GST_DEBUG_OBJECT (self, "all pads have data");
658 /* Before waiting, check if we're actually still running */
659 if (!self->priv->running || !self->priv->send_eos) {
665 start = gst_aggregator_get_next_time (self);
667 /* If we're not live, or if we use the running time
668 * of the first buffer as start time, we wait until
669 * all pads have buffers.
670 * Otherwise (i.e. if we are live!), we wait on the clock
671 * and if a pad does not have a buffer in time we ignore
674 GST_OBJECT_LOCK (self);
675 if (!GST_CLOCK_TIME_IS_VALID (latency) ||
676 !GST_IS_CLOCK (GST_ELEMENT_CLOCK (self)) ||
677 !GST_CLOCK_TIME_IS_VALID (start) ||
678 (self->priv->first_buffer
679 && self->priv->start_time_selection ==
680 GST_AGGREGATOR_START_TIME_SELECTION_FIRST)) {
681 /* We wake up here when something happened, and below
682 * then check if we're ready now. If we return FALSE,
683 * we will be directly called again.
685 GST_OBJECT_UNLOCK (self);
688 GstClockTime base_time, time;
690 GstClockReturn status;
691 GstClockTimeDiff jitter;
693 GST_DEBUG_OBJECT (self, "got subclass start time: %" GST_TIME_FORMAT,
694 GST_TIME_ARGS (start));
696 base_time = GST_ELEMENT_CAST (self)->base_time;
697 clock = gst_object_ref (GST_ELEMENT_CLOCK (self));
698 GST_OBJECT_UNLOCK (self);
700 time = base_time + start;
703 GST_DEBUG_OBJECT (self, "possibly waiting for clock to reach %"
704 GST_TIME_FORMAT " (base %" GST_TIME_FORMAT " start %" GST_TIME_FORMAT
705 " latency %" GST_TIME_FORMAT " current %" GST_TIME_FORMAT ")",
706 GST_TIME_ARGS (time),
707 GST_TIME_ARGS (base_time),
708 GST_TIME_ARGS (start), GST_TIME_ARGS (latency),
709 GST_TIME_ARGS (gst_clock_get_time (clock)));
711 self->priv->aggregate_id = gst_clock_new_single_shot_id (clock, time);
712 gst_object_unref (clock);
716 status = gst_clock_id_wait (self->priv->aggregate_id, &jitter);
719 if (self->priv->aggregate_id) {
720 gst_clock_id_unref (self->priv->aggregate_id);
721 self->priv->aggregate_id = NULL;
724 GST_DEBUG_OBJECT (self,
725 "clock returned %d (jitter: %" GST_STIME_FORMAT ")",
726 status, GST_STIME_ARGS (jitter));
729 if (status == GST_CLOCK_OK || status == GST_CLOCK_EARLY) {
736 res = gst_aggregator_check_pads_ready (self);
743 check_events (GstAggregator * self, GstAggregatorPad * pad, gpointer user_data)
745 GstEvent *event = NULL;
746 GstAggregatorClass *klass = NULL;
747 gboolean *processed_event = user_data;
753 if (pad->priv->num_buffers == 0 && pad->priv->pending_eos) {
754 pad->priv->pending_eos = FALSE;
755 pad->priv->eos = TRUE;
757 if (pad->priv->clipped_buffer == NULL &&
758 GST_IS_EVENT (g_queue_peek_tail (&pad->priv->buffers))) {
759 event = g_queue_pop_tail (&pad->priv->buffers);
760 PAD_BROADCAST_EVENT (pad);
765 *processed_event = TRUE;
767 klass = GST_AGGREGATOR_GET_CLASS (self);
769 GST_LOG_OBJECT (pad, "Processing %" GST_PTR_FORMAT, event);
770 klass->sink_event (self, pad, event);
772 } while (event != NULL);
778 gst_aggregator_pad_set_flushing (GstAggregatorPad * aggpad,
779 GstFlowReturn flow_return, gboolean full)
784 if (flow_return == GST_FLOW_NOT_LINKED)
785 aggpad->priv->flow_return = MIN (flow_return, aggpad->priv->flow_return);
787 aggpad->priv->flow_return = flow_return;
789 item = g_queue_peek_head_link (&aggpad->priv->buffers);
791 GList *next = item->next;
793 /* In partial flush, we do like the pad, we get rid of non-sticky events
796 if (full || GST_IS_BUFFER (item->data) ||
797 GST_EVENT_TYPE (item->data) == GST_EVENT_EOS ||
798 GST_EVENT_TYPE (item->data) == GST_EVENT_SEGMENT ||
799 !GST_EVENT_IS_STICKY (item->data)) {
800 gst_mini_object_unref (item->data);
801 g_queue_delete_link (&aggpad->priv->buffers, item);
805 aggpad->priv->num_buffers = 0;
806 gst_buffer_replace (&aggpad->priv->clipped_buffer, NULL);
808 PAD_BROADCAST_EVENT (aggpad);
813 gst_aggregator_default_update_src_caps (GstAggregator * agg, GstCaps * caps,
816 *ret = gst_caps_ref (caps);
822 gst_aggregator_default_fixate_src_caps (GstAggregator * agg, GstCaps * caps)
824 caps = gst_caps_fixate (caps);
830 gst_aggregator_default_negotiated_src_caps (GstAggregator * agg, GstCaps * caps)
835 /* WITH SRC_LOCK held */
837 gst_aggregator_update_src_caps (GstAggregator * self)
839 GstAggregatorClass *agg_klass = GST_AGGREGATOR_GET_CLASS (self);
840 GstCaps *downstream_caps, *template_caps, *caps = NULL;
841 GstFlowReturn ret = GST_FLOW_OK;
843 template_caps = gst_pad_get_pad_template_caps (self->srcpad);
844 downstream_caps = gst_pad_peer_query_caps (self->srcpad, template_caps);
846 if (gst_caps_is_empty (downstream_caps)) {
847 GST_INFO_OBJECT (self, "Downstream caps (%"
848 GST_PTR_FORMAT ") not compatible with pad template caps (%"
849 GST_PTR_FORMAT ")", downstream_caps, template_caps);
850 ret = GST_FLOW_NOT_NEGOTIATED;
854 g_assert (agg_klass->update_src_caps);
855 GST_DEBUG_OBJECT (self, "updating caps from %" GST_PTR_FORMAT,
857 ret = agg_klass->update_src_caps (self, downstream_caps, &caps);
858 if (ret < GST_FLOW_OK) {
859 GST_WARNING_OBJECT (self, "Subclass failed to update provided caps");
862 if ((caps == NULL || gst_caps_is_empty (caps)) && ret >= GST_FLOW_OK) {
863 ret = GST_FLOW_NOT_NEGOTIATED;
866 GST_DEBUG_OBJECT (self, " to %" GST_PTR_FORMAT, caps);
868 #ifdef GST_ENABLE_EXTRA_CHECKS
869 if (!gst_caps_is_subset (caps, template_caps)) {
870 GstCaps *intersection;
872 GST_ERROR_OBJECT (self,
873 "update_src_caps returned caps %" GST_PTR_FORMAT
874 " which are not a real subset of the template caps %"
875 GST_PTR_FORMAT, caps, template_caps);
876 g_warning ("%s: update_src_caps returned caps which are not a real "
877 "subset of the filter caps", GST_ELEMENT_NAME (self));
880 gst_caps_intersect_full (template_caps, caps, GST_CAPS_INTERSECT_FIRST);
881 gst_caps_unref (caps);
886 if (gst_caps_is_any (caps)) {
890 if (!gst_caps_is_fixed (caps)) {
891 g_assert (agg_klass->fixate_src_caps);
893 GST_DEBUG_OBJECT (self, "fixate caps from %" GST_PTR_FORMAT, caps);
894 if (!(caps = agg_klass->fixate_src_caps (self, caps))) {
895 GST_WARNING_OBJECT (self, "Subclass failed to fixate provided caps");
896 ret = GST_FLOW_NOT_NEGOTIATED;
899 GST_DEBUG_OBJECT (self, " to %" GST_PTR_FORMAT, caps);
902 if (agg_klass->negotiated_src_caps) {
903 if (!agg_klass->negotiated_src_caps (self, caps)) {
904 GST_WARNING_OBJECT (self, "Subclass failed to accept negotiated caps");
905 ret = GST_FLOW_NOT_NEGOTIATED;
910 gst_aggregator_set_src_caps (self, caps);
913 gst_caps_unref (downstream_caps);
914 gst_caps_unref (template_caps);
917 gst_caps_unref (caps);
923 gst_aggregator_aggregate_func (GstAggregator * self)
925 GstAggregatorPrivate *priv = self->priv;
926 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
927 gboolean timeout = FALSE;
929 if (self->priv->running == FALSE) {
930 GST_DEBUG_OBJECT (self, "Not running anymore");
934 GST_LOG_OBJECT (self, "Checking aggregate");
935 while (priv->send_eos && priv->running) {
936 GstFlowReturn flow_return = GST_FLOW_OK;
937 gboolean processed_event = FALSE;
939 gst_aggregator_iterate_sinkpads (self, check_events, NULL);
941 if (!gst_aggregator_wait_and_check (self, &timeout))
944 gst_aggregator_iterate_sinkpads (self, check_events, &processed_event);
948 if (gst_pad_check_reconfigure (GST_AGGREGATOR_SRC_PAD (self))) {
949 flow_return = gst_aggregator_update_src_caps (self);
950 if (flow_return != GST_FLOW_OK)
951 gst_pad_mark_reconfigure (GST_AGGREGATOR_SRC_PAD (self));
954 if (timeout || flow_return >= GST_FLOW_OK) {
955 GST_TRACE_OBJECT (self, "Actually aggregating!");
956 flow_return = klass->aggregate (self, timeout);
959 if (flow_return == GST_AGGREGATOR_FLOW_NEED_DATA)
962 GST_OBJECT_LOCK (self);
963 if (flow_return == GST_FLOW_FLUSHING && priv->flush_seeking) {
964 /* We don't want to set the pads to flushing, but we want to
965 * stop the thread, so just break here */
966 GST_OBJECT_UNLOCK (self);
969 GST_OBJECT_UNLOCK (self);
971 if (flow_return == GST_FLOW_EOS || flow_return == GST_FLOW_ERROR) {
972 gst_aggregator_push_eos (self);
975 GST_LOG_OBJECT (self, "flow return is %s", gst_flow_get_name (flow_return));
977 if (flow_return != GST_FLOW_OK) {
980 GST_OBJECT_LOCK (self);
981 for (item = GST_ELEMENT (self)->sinkpads; item; item = item->next) {
982 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
984 gst_aggregator_pad_set_flushing (aggpad, flow_return, TRUE);
986 GST_OBJECT_UNLOCK (self);
991 /* Pause the task here, the only ways to get here are:
992 * 1) We're stopping, in which case the task is stopped anyway
993 * 2) We got a flow error above, in which case it might take
994 * some time to forward the flow return upstream and we
995 * would otherwise call the task function over and over
996 * again without doing anything
998 gst_pad_pause_task (self->srcpad);
1002 gst_aggregator_start (GstAggregator * self)
1004 GstAggregatorClass *klass;
1007 self->priv->send_stream_start = TRUE;
1008 self->priv->send_segment = TRUE;
1009 self->priv->send_eos = TRUE;
1010 self->priv->srccaps = NULL;
1012 klass = GST_AGGREGATOR_GET_CLASS (self);
1015 result = klass->start (self);
1023 _check_pending_flush_stop (GstAggregatorPad * pad)
1028 res = (!pad->priv->pending_flush_stop && !pad->priv->pending_flush_start);
1035 gst_aggregator_stop_srcpad_task (GstAggregator * self, GstEvent * flush_start)
1037 gboolean res = TRUE;
1039 GST_INFO_OBJECT (self, "%s srcpad task",
1040 flush_start ? "Pausing" : "Stopping");
1043 self->priv->running = FALSE;
1044 SRC_BROADCAST (self);
1048 res = gst_pad_push_event (self->srcpad, flush_start);
1051 gst_pad_stop_task (self->srcpad);
1057 gst_aggregator_start_srcpad_task (GstAggregator * self)
1059 GST_INFO_OBJECT (self, "Starting srcpad task");
1061 self->priv->running = TRUE;
1062 gst_pad_start_task (GST_PAD (self->srcpad),
1063 (GstTaskFunction) gst_aggregator_aggregate_func, self, NULL);
1066 static GstFlowReturn
1067 gst_aggregator_flush (GstAggregator * self)
1069 GstFlowReturn ret = GST_FLOW_OK;
1070 GstAggregatorPrivate *priv = self->priv;
1071 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
1073 GST_DEBUG_OBJECT (self, "Flushing everything");
1074 GST_OBJECT_LOCK (self);
1075 priv->send_segment = TRUE;
1076 priv->flush_seeking = FALSE;
1077 priv->tags_changed = FALSE;
1078 GST_OBJECT_UNLOCK (self);
1080 ret = klass->flush (self);
1086 /* Called with GstAggregator's object lock held */
1089 gst_aggregator_all_flush_stop_received_locked (GstAggregator * self)
1092 GstAggregatorPad *tmppad;
1094 for (tmp = GST_ELEMENT (self)->sinkpads; tmp; tmp = tmp->next) {
1095 tmppad = (GstAggregatorPad *) tmp->data;
1097 if (_check_pending_flush_stop (tmppad) == FALSE) {
1098 GST_DEBUG_OBJECT (tmppad, "Is not last %i -- %i",
1099 tmppad->priv->pending_flush_start, tmppad->priv->pending_flush_stop);
1108 gst_aggregator_flush_start (GstAggregator * self, GstAggregatorPad * aggpad,
1111 GstAggregatorPrivate *priv = self->priv;
1112 GstAggregatorPadPrivate *padpriv = aggpad->priv;
1114 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, FALSE);
1116 PAD_FLUSH_LOCK (aggpad);
1118 if (padpriv->pending_flush_start) {
1119 GST_DEBUG_OBJECT (aggpad, "Expecting FLUSH_STOP now");
1121 padpriv->pending_flush_start = FALSE;
1122 padpriv->pending_flush_stop = TRUE;
1124 PAD_UNLOCK (aggpad);
1126 GST_OBJECT_LOCK (self);
1127 if (priv->flush_seeking) {
1128 /* If flush_seeking we forward the first FLUSH_START */
1129 if (priv->pending_flush_start) {
1130 priv->pending_flush_start = FALSE;
1131 GST_OBJECT_UNLOCK (self);
1133 GST_INFO_OBJECT (self, "Flushing, pausing srcpad task");
1134 gst_aggregator_stop_srcpad_task (self, event);
1136 GST_INFO_OBJECT (self, "Getting STREAM_LOCK while seeking");
1137 GST_PAD_STREAM_LOCK (self->srcpad);
1138 GST_LOG_OBJECT (self, "GOT STREAM_LOCK");
1141 GST_OBJECT_UNLOCK (self);
1142 gst_event_unref (event);
1145 GST_OBJECT_UNLOCK (self);
1146 gst_event_unref (event);
1148 PAD_FLUSH_UNLOCK (aggpad);
1151 /* Must be called with the the PAD_LOCK held */
1153 update_time_level (GstAggregatorPad * aggpad, gboolean head)
1156 if (GST_CLOCK_TIME_IS_VALID (aggpad->priv->head_position) &&
1157 aggpad->priv->head_segment.format == GST_FORMAT_TIME)
1158 aggpad->priv->head_time =
1159 gst_segment_to_running_time (&aggpad->priv->head_segment,
1160 GST_FORMAT_TIME, aggpad->priv->head_position);
1162 aggpad->priv->head_time = GST_CLOCK_TIME_NONE;
1164 if (!GST_CLOCK_TIME_IS_VALID (aggpad->priv->tail_time))
1165 aggpad->priv->tail_time = aggpad->priv->head_time;
1167 if (GST_CLOCK_TIME_IS_VALID (aggpad->priv->tail_position) &&
1168 aggpad->segment.format == GST_FORMAT_TIME)
1169 aggpad->priv->tail_time =
1170 gst_segment_to_running_time (&aggpad->segment,
1171 GST_FORMAT_TIME, aggpad->priv->tail_position);
1173 aggpad->priv->tail_time = aggpad->priv->head_time;
1176 if (aggpad->priv->head_time == GST_CLOCK_TIME_NONE ||
1177 aggpad->priv->tail_time == GST_CLOCK_TIME_NONE) {
1178 aggpad->priv->time_level = 0;
1182 if (aggpad->priv->tail_time > aggpad->priv->head_time)
1183 aggpad->priv->time_level = 0;
1185 aggpad->priv->time_level = aggpad->priv->head_time -
1186 aggpad->priv->tail_time;
1190 /* GstAggregator vmethods default implementations */
1192 gst_aggregator_default_sink_event (GstAggregator * self,
1193 GstAggregatorPad * aggpad, GstEvent * event)
1195 gboolean res = TRUE;
1196 GstPad *pad = GST_PAD (aggpad);
1197 GstAggregatorPrivate *priv = self->priv;
1199 switch (GST_EVENT_TYPE (event)) {
1200 case GST_EVENT_FLUSH_START:
1202 gst_aggregator_flush_start (self, aggpad, event);
1203 /* We forward only in one case: right after flush_seeking */
1207 case GST_EVENT_FLUSH_STOP:
1209 GST_DEBUG_OBJECT (aggpad, "Got FLUSH_STOP");
1211 gst_aggregator_pad_flush (aggpad, self);
1212 GST_OBJECT_LOCK (self);
1213 if (priv->flush_seeking) {
1214 g_atomic_int_set (&aggpad->priv->pending_flush_stop, FALSE);
1215 if (gst_aggregator_all_flush_stop_received_locked (self)) {
1216 GST_OBJECT_UNLOCK (self);
1217 /* That means we received FLUSH_STOP/FLUSH_STOP on
1218 * all sinkpads -- Seeking is Done... sending FLUSH_STOP */
1219 gst_aggregator_flush (self);
1220 gst_pad_push_event (self->srcpad, event);
1223 priv->send_eos = TRUE;
1224 SRC_BROADCAST (self);
1227 GST_INFO_OBJECT (self, "Releasing source pad STREAM_LOCK");
1228 GST_PAD_STREAM_UNLOCK (self->srcpad);
1229 gst_aggregator_start_srcpad_task (self);
1231 GST_OBJECT_UNLOCK (self);
1234 GST_OBJECT_UNLOCK (self);
1237 /* We never forward the event */
1242 GST_DEBUG_OBJECT (aggpad, "EOS");
1244 /* We still have a buffer, and we don't want the subclass to have to
1245 * check for it. Mark pending_eos, eos will be set when steal_buffer is
1250 if (aggpad->priv->num_buffers == 0) {
1251 aggpad->priv->eos = TRUE;
1253 aggpad->priv->pending_eos = TRUE;
1255 PAD_UNLOCK (aggpad);
1257 SRC_BROADCAST (self);
1261 case GST_EVENT_SEGMENT:
1264 GST_OBJECT_LOCK (aggpad);
1265 gst_event_copy_segment (event, &aggpad->segment);
1266 update_time_level (aggpad, FALSE);
1267 GST_OBJECT_UNLOCK (aggpad);
1268 PAD_UNLOCK (aggpad);
1270 GST_OBJECT_LOCK (self);
1271 self->priv->seqnum = gst_event_get_seqnum (event);
1272 GST_OBJECT_UNLOCK (self);
1275 case GST_EVENT_STREAM_START:
1281 GstClockTime pts, endpts;
1282 GstClockTime duration;
1285 gst_event_parse_gap (event, &pts, &duration);
1286 gapbuf = gst_buffer_new ();
1288 if (GST_CLOCK_TIME_IS_VALID (duration))
1289 endpts = pts + duration;
1291 endpts = GST_CLOCK_TIME_NONE;
1293 GST_OBJECT_LOCK (aggpad);
1294 res = gst_segment_clip (&aggpad->segment, GST_FORMAT_TIME, pts, endpts,
1296 GST_OBJECT_UNLOCK (aggpad);
1299 GST_WARNING_OBJECT (self, "GAP event outside segment, dropping");
1303 if (GST_CLOCK_TIME_IS_VALID (endpts) && GST_CLOCK_TIME_IS_VALID (pts))
1304 duration = endpts - pts;
1306 duration = GST_CLOCK_TIME_NONE;
1308 GST_BUFFER_PTS (gapbuf) = pts;
1309 GST_BUFFER_DURATION (gapbuf) = duration;
1310 GST_BUFFER_FLAG_SET (gapbuf, GST_BUFFER_FLAG_GAP);
1311 GST_BUFFER_FLAG_SET (gapbuf, GST_BUFFER_FLAG_DROPPABLE);
1313 if (gst_aggregator_pad_chain_internal (self, aggpad, gapbuf, FALSE) !=
1315 GST_WARNING_OBJECT (self, "Failed to chain gap buffer");
1325 gst_event_parse_tag (event, &tags);
1327 if (gst_tag_list_get_scope (tags) == GST_TAG_SCOPE_STREAM) {
1328 gst_aggregator_merge_tags (self, tags, GST_TAG_MERGE_REPLACE);
1329 gst_event_unref (event);
1341 GST_DEBUG_OBJECT (pad, "Forwarding event: %" GST_PTR_FORMAT, event);
1342 return gst_pad_event_default (pad, GST_OBJECT (self), event);
1345 GST_DEBUG_OBJECT (pad, "Eating event: %" GST_PTR_FORMAT, event);
1347 gst_event_unref (event);
1352 static inline gboolean
1353 gst_aggregator_stop_pad (GstAggregator * self, GstAggregatorPad * pad,
1354 gpointer unused_udata)
1356 gst_aggregator_pad_flush (pad, self);
1362 gst_aggregator_stop (GstAggregator * agg)
1364 GstAggregatorClass *klass;
1367 gst_aggregator_reset_flow_values (agg);
1369 gst_aggregator_iterate_sinkpads (agg, gst_aggregator_stop_pad, NULL);
1371 klass = GST_AGGREGATOR_GET_CLASS (agg);
1374 result = klass->stop (agg);
1378 agg->priv->has_peer_latency = FALSE;
1379 agg->priv->peer_latency_live = FALSE;
1380 agg->priv->peer_latency_min = agg->priv->peer_latency_max = FALSE;
1382 if (agg->priv->tags)
1383 gst_tag_list_unref (agg->priv->tags);
1384 agg->priv->tags = NULL;
1389 /* GstElement vmethods implementations */
1390 static GstStateChangeReturn
1391 gst_aggregator_change_state (GstElement * element, GstStateChange transition)
1393 GstStateChangeReturn ret;
1394 GstAggregator *self = GST_AGGREGATOR (element);
1396 switch (transition) {
1397 case GST_STATE_CHANGE_READY_TO_PAUSED:
1398 if (!gst_aggregator_start (self))
1406 GST_ELEMENT_CLASS (aggregator_parent_class)->change_state (element,
1407 transition)) == GST_STATE_CHANGE_FAILURE)
1411 switch (transition) {
1412 case GST_STATE_CHANGE_PAUSED_TO_READY:
1413 if (!gst_aggregator_stop (self)) {
1414 /* What to do in this case? Error out? */
1415 GST_ERROR_OBJECT (self, "Subclass failed to stop.");
1427 GST_ERROR_OBJECT (element, "parent failed state change");
1432 GST_ERROR_OBJECT (element, "Subclass failed to start");
1433 return GST_STATE_CHANGE_FAILURE;
1438 gst_aggregator_release_pad (GstElement * element, GstPad * pad)
1440 GstAggregator *self = GST_AGGREGATOR (element);
1441 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1443 GST_INFO_OBJECT (pad, "Removing pad");
1446 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, TRUE);
1447 gst_element_remove_pad (element, pad);
1449 self->priv->has_peer_latency = FALSE;
1450 SRC_BROADCAST (self);
1454 static GstAggregatorPad *
1455 gst_aggregator_default_create_new_pad (GstAggregator * self,
1456 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
1458 GstAggregatorPad *agg_pad;
1459 GstAggregatorPrivate *priv = self->priv;
1463 if (templ->direction != GST_PAD_SINK ||
1464 g_strcmp0 (templ->name_template, "sink_%u") != 0)
1467 GST_OBJECT_LOCK (self);
1468 if (req_name == NULL || strlen (req_name) < 6
1469 || !g_str_has_prefix (req_name, "sink_")) {
1470 /* no name given when requesting the pad, use next available int */
1471 serial = ++priv->max_padserial;
1473 /* parse serial number from requested padname */
1474 serial = g_ascii_strtoull (&req_name[5], NULL, 10);
1475 if (serial > priv->max_padserial)
1476 priv->max_padserial = serial;
1479 name = g_strdup_printf ("sink_%u", serial);
1480 agg_pad = g_object_new (GST_AGGREGATOR_GET_CLASS (self)->sinkpads_type,
1481 "name", name, "direction", GST_PAD_SINK, "template", templ, NULL);
1484 GST_OBJECT_UNLOCK (self);
1491 GST_WARNING_OBJECT (self, "request new pad that is not a SINK pad\n");
1497 gst_aggregator_request_new_pad (GstElement * element,
1498 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
1500 GstAggregator *self;
1501 GstAggregatorPad *agg_pad;
1502 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (element);
1503 GstAggregatorPrivate *priv = GST_AGGREGATOR (element)->priv;
1505 self = GST_AGGREGATOR (element);
1507 agg_pad = klass->create_new_pad (self, templ, req_name, caps);
1509 GST_ERROR_OBJECT (element, "Couldn't create new pad");
1513 GST_DEBUG_OBJECT (element, "Adding pad %s", GST_PAD_NAME (agg_pad));
1516 gst_pad_set_active (GST_PAD (agg_pad), TRUE);
1518 /* add the pad to the element */
1519 gst_element_add_pad (element, GST_PAD (agg_pad));
1521 return GST_PAD (agg_pad);
1524 /* Must be called with SRC_LOCK held */
1527 gst_aggregator_query_latency_unlocked (GstAggregator * self, GstQuery * query)
1529 gboolean query_ret, live;
1530 GstClockTime our_latency, min, max;
1532 query_ret = gst_pad_query_default (self->srcpad, GST_OBJECT (self), query);
1535 GST_WARNING_OBJECT (self, "Latency query failed");
1539 gst_query_parse_latency (query, &live, &min, &max);
1541 our_latency = self->priv->latency;
1543 if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (min))) {
1544 GST_ERROR_OBJECT (self, "Invalid minimum latency %" GST_TIME_FORMAT
1545 ". Please file a bug at " PACKAGE_BUGREPORT ".", GST_TIME_ARGS (min));
1549 if (min > max && GST_CLOCK_TIME_IS_VALID (max)) {
1550 GST_ELEMENT_WARNING (self, CORE, CLOCK, (NULL),
1551 ("Impossible to configure latency: max %" GST_TIME_FORMAT " < min %"
1552 GST_TIME_FORMAT ". Add queues or other buffering elements.",
1553 GST_TIME_ARGS (max), GST_TIME_ARGS (min)));
1557 self->priv->peer_latency_live = live;
1558 self->priv->peer_latency_min = min;
1559 self->priv->peer_latency_max = max;
1560 self->priv->has_peer_latency = TRUE;
1564 min += self->priv->sub_latency_min;
1565 if (GST_CLOCK_TIME_IS_VALID (self->priv->sub_latency_max)
1566 && GST_CLOCK_TIME_IS_VALID (max))
1567 max += self->priv->sub_latency_max + our_latency;
1569 max = GST_CLOCK_TIME_NONE;
1571 SRC_BROADCAST (self);
1573 GST_DEBUG_OBJECT (self, "configured latency live:%s min:%" G_GINT64_FORMAT
1574 " max:%" G_GINT64_FORMAT, live ? "true" : "false", min, max);
1576 gst_query_set_latency (query, live, min, max);
1582 * MUST be called with the src_lock held.
1584 * See gst_aggregator_get_latency() for doc
1587 gst_aggregator_get_latency_unlocked (GstAggregator * self)
1589 GstClockTime latency;
1591 g_return_val_if_fail (GST_IS_AGGREGATOR (self), 0);
1593 if (!self->priv->has_peer_latency) {
1594 GstQuery *query = gst_query_new_latency ();
1597 ret = gst_aggregator_query_latency_unlocked (self, query);
1598 gst_query_unref (query);
1600 return GST_CLOCK_TIME_NONE;
1603 if (!self->priv->has_peer_latency || !self->priv->peer_latency_live)
1604 return GST_CLOCK_TIME_NONE;
1606 /* latency_min is never GST_CLOCK_TIME_NONE by construction */
1607 latency = self->priv->peer_latency_min;
1610 latency += self->priv->latency;
1611 latency += self->priv->sub_latency_min;
1617 * gst_aggregator_get_latency:
1618 * @self: a #GstAggregator
1620 * Retrieves the latency values reported by @self in response to the latency
1621 * query, or %GST_CLOCK_TIME_NONE if there is not live source connected and the element
1622 * will not wait for the clock.
1624 * Typically only called by subclasses.
1626 * Returns: The latency or %GST_CLOCK_TIME_NONE if the element does not sync
1629 gst_aggregator_get_latency (GstAggregator * self)
1634 ret = gst_aggregator_get_latency_unlocked (self);
1641 gst_aggregator_send_event (GstElement * element, GstEvent * event)
1643 GstAggregator *self = GST_AGGREGATOR (element);
1645 GST_STATE_LOCK (element);
1646 if (GST_EVENT_TYPE (event) == GST_EVENT_SEEK &&
1647 GST_STATE (element) < GST_STATE_PAUSED) {
1651 GstSeekType start_type, stop_type;
1654 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1655 &start, &stop_type, &stop);
1657 GST_OBJECT_LOCK (self);
1658 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
1659 stop_type, stop, NULL);
1660 self->priv->seqnum = gst_event_get_seqnum (event);
1661 self->priv->first_buffer = FALSE;
1662 GST_OBJECT_UNLOCK (self);
1664 GST_DEBUG_OBJECT (element, "Storing segment %" GST_PTR_FORMAT, event);
1666 GST_STATE_UNLOCK (element);
1669 return GST_ELEMENT_CLASS (aggregator_parent_class)->send_event (element,
1674 gst_aggregator_default_src_query (GstAggregator * self, GstQuery * query)
1676 gboolean res = TRUE;
1678 switch (GST_QUERY_TYPE (query)) {
1679 case GST_QUERY_SEEKING:
1683 /* don't pass it along as some (file)sink might claim it does
1684 * whereas with a collectpads in between that will not likely work */
1685 gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
1686 gst_query_set_seeking (query, format, FALSE, 0, -1);
1691 case GST_QUERY_LATENCY:
1693 res = gst_aggregator_query_latency_unlocked (self, query);
1697 return gst_pad_query_default (self->srcpad, GST_OBJECT (self), query);
1704 gst_aggregator_event_forward_func (GstPad * pad, gpointer user_data)
1706 EventData *evdata = user_data;
1707 gboolean ret = TRUE;
1708 GstPad *peer = gst_pad_get_peer (pad);
1709 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1712 if (evdata->only_to_active_pads && aggpad->priv->first_buffer) {
1713 GST_DEBUG_OBJECT (pad, "not sending event to inactive pad");
1716 ret = gst_pad_send_event (peer, gst_event_ref (evdata->event));
1717 GST_DEBUG_OBJECT (pad, "return of event push is %d", ret);
1718 gst_object_unref (peer);
1723 if (GST_EVENT_TYPE (evdata->event) == GST_EVENT_SEEK) {
1724 GstQuery *seeking = gst_query_new_seeking (GST_FORMAT_TIME);
1726 GST_DEBUG_OBJECT (pad, "Event %" GST_PTR_FORMAT " failed", evdata->event);
1728 if (gst_pad_query (peer, seeking)) {
1731 gst_query_parse_seeking (seeking, NULL, &seekable, NULL, NULL);
1733 if (seekable == FALSE) {
1734 GST_INFO_OBJECT (pad,
1735 "Source not seekable, We failed but it does not matter!");
1740 GST_ERROR_OBJECT (pad, "Query seeking FAILED");
1743 gst_query_unref (seeking);
1746 if (evdata->flush) {
1748 aggpad->priv->pending_flush_start = FALSE;
1749 aggpad->priv->pending_flush_stop = FALSE;
1750 PAD_UNLOCK (aggpad);
1753 evdata->one_actually_seeked = TRUE;
1756 evdata->result &= ret;
1758 /* Always send to all pads */
1763 gst_aggregator_forward_event_to_all_sinkpads (GstAggregator * self,
1764 GstEvent * event, gboolean flush, gboolean only_to_active_pads)
1768 evdata.event = event;
1769 evdata.result = TRUE;
1770 evdata.flush = flush;
1771 evdata.one_actually_seeked = FALSE;
1772 evdata.only_to_active_pads = only_to_active_pads;
1774 /* We first need to set all pads as flushing in a first pass
1775 * as flush_start flush_stop is sometimes sent synchronously
1776 * while we send the seek event */
1780 GST_OBJECT_LOCK (self);
1781 for (l = GST_ELEMENT_CAST (self)->sinkpads; l != NULL; l = l->next) {
1782 GstAggregatorPad *pad = l->data;
1785 pad->priv->pending_flush_start = TRUE;
1786 pad->priv->pending_flush_stop = FALSE;
1789 GST_OBJECT_UNLOCK (self);
1792 gst_pad_forward (self->srcpad, gst_aggregator_event_forward_func, &evdata);
1794 gst_event_unref (event);
1800 gst_aggregator_do_seek (GstAggregator * self, GstEvent * event)
1805 GstSeekType start_type, stop_type;
1809 GstAggregatorPrivate *priv = self->priv;
1811 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1812 &start, &stop_type, &stop);
1814 GST_INFO_OBJECT (self, "starting SEEK");
1816 flush = flags & GST_SEEK_FLAG_FLUSH;
1818 GST_OBJECT_LOCK (self);
1820 priv->pending_flush_start = TRUE;
1821 priv->flush_seeking = TRUE;
1824 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
1825 stop_type, stop, NULL);
1827 /* Seeking sets a position */
1828 self->priv->first_buffer = FALSE;
1829 GST_OBJECT_UNLOCK (self);
1831 /* forward the seek upstream */
1833 gst_aggregator_forward_event_to_all_sinkpads (self, event, flush, FALSE);
1836 if (!evdata.result || !evdata.one_actually_seeked) {
1837 GST_OBJECT_LOCK (self);
1838 priv->flush_seeking = FALSE;
1839 priv->pending_flush_start = FALSE;
1840 GST_OBJECT_UNLOCK (self);
1843 GST_INFO_OBJECT (self, "seek done, result: %d", evdata.result);
1845 return evdata.result;
1849 gst_aggregator_default_src_event (GstAggregator * self, GstEvent * event)
1852 gboolean res = TRUE;
1854 switch (GST_EVENT_TYPE (event)) {
1855 case GST_EVENT_SEEK:
1857 gst_event_ref (event);
1858 res = gst_aggregator_do_seek (self, event);
1859 gst_event_unref (event);
1863 case GST_EVENT_NAVIGATION:
1865 /* navigation is rather pointless. */
1867 gst_event_unref (event);
1876 /* Don't forward QOS events to pads that had no active buffer yet. Otherwise
1877 * they will receive a QOS event that has earliest_time=0 (because we can't
1878 * have negative timestamps), and consider their buffer as too late */
1880 gst_aggregator_forward_event_to_all_sinkpads (self, event, FALSE,
1881 GST_EVENT_TYPE (event) == GST_EVENT_QOS);
1882 res = evdata.result;
1889 gst_aggregator_src_pad_event_func (GstPad * pad, GstObject * parent,
1892 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
1894 return klass->src_event (GST_AGGREGATOR (parent), event);
1898 gst_aggregator_src_pad_query_func (GstPad * pad, GstObject * parent,
1901 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
1903 return klass->src_query (GST_AGGREGATOR (parent), query);
1907 gst_aggregator_src_pad_activate_mode_func (GstPad * pad,
1908 GstObject * parent, GstPadMode mode, gboolean active)
1910 GstAggregator *self = GST_AGGREGATOR (parent);
1911 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
1913 if (klass->src_activate) {
1914 if (klass->src_activate (self, mode, active) == FALSE) {
1919 if (active == TRUE) {
1921 case GST_PAD_MODE_PUSH:
1923 GST_INFO_OBJECT (pad, "Activating pad!");
1924 gst_aggregator_start_srcpad_task (self);
1929 GST_ERROR_OBJECT (pad, "Only supported mode is PUSH");
1936 GST_INFO_OBJECT (self, "Deactivating srcpad");
1937 gst_aggregator_stop_srcpad_task (self, FALSE);
1943 gst_aggregator_default_sink_query (GstAggregator * self,
1944 GstAggregatorPad * aggpad, GstQuery * query)
1946 GstPad *pad = GST_PAD (aggpad);
1948 return gst_pad_query_default (pad, GST_OBJECT (self), query);
1952 gst_aggregator_finalize (GObject * object)
1954 GstAggregator *self = (GstAggregator *) object;
1956 g_mutex_clear (&self->priv->src_lock);
1957 g_cond_clear (&self->priv->src_cond);
1959 G_OBJECT_CLASS (aggregator_parent_class)->finalize (object);
1963 * gst_aggregator_set_latency_property:
1964 * @agg: a #GstAggregator
1965 * @latency: the new latency value (in nanoseconds).
1967 * Sets the new latency value to @latency. This value is used to limit the
1968 * amount of time a pad waits for data to appear before considering the pad
1972 gst_aggregator_set_latency_property (GstAggregator * self, gint64 latency)
1976 g_return_if_fail (GST_IS_AGGREGATOR (self));
1977 g_return_if_fail (GST_CLOCK_TIME_IS_VALID (latency));
1980 changed = (self->priv->latency != latency);
1985 GST_OBJECT_LOCK (self);
1986 /* First lock all the pads */
1987 for (item = GST_ELEMENT_CAST (self)->sinkpads; item; item = item->next) {
1988 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
1992 self->priv->latency = latency;
1994 SRC_BROADCAST (self);
1996 /* Now wake up the pads */
1997 for (item = GST_ELEMENT_CAST (self)->sinkpads; item; item = item->next) {
1998 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
1999 PAD_BROADCAST_EVENT (aggpad);
2000 PAD_UNLOCK (aggpad);
2002 GST_OBJECT_UNLOCK (self);
2008 gst_element_post_message (GST_ELEMENT_CAST (self),
2009 gst_message_new_latency (GST_OBJECT_CAST (self)));
2013 * gst_aggregator_get_latency_property:
2014 * @agg: a #GstAggregator
2016 * Gets the latency value. See gst_aggregator_set_latency for
2019 * Returns: The time in nanoseconds to wait for data to arrive on a sink pad
2020 * before a pad is deemed unresponsive. A value of -1 means an
2024 gst_aggregator_get_latency_property (GstAggregator * agg)
2028 g_return_val_if_fail (GST_IS_AGGREGATOR (agg), -1);
2030 GST_OBJECT_LOCK (agg);
2031 res = agg->priv->latency;
2032 GST_OBJECT_UNLOCK (agg);
2038 gst_aggregator_set_property (GObject * object, guint prop_id,
2039 const GValue * value, GParamSpec * pspec)
2041 GstAggregator *agg = GST_AGGREGATOR (object);
2045 gst_aggregator_set_latency_property (agg, g_value_get_int64 (value));
2047 case PROP_START_TIME_SELECTION:
2048 agg->priv->start_time_selection = g_value_get_enum (value);
2050 case PROP_START_TIME:
2051 agg->priv->start_time = g_value_get_uint64 (value);
2054 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2060 gst_aggregator_get_property (GObject * object, guint prop_id,
2061 GValue * value, GParamSpec * pspec)
2063 GstAggregator *agg = GST_AGGREGATOR (object);
2067 g_value_set_int64 (value, gst_aggregator_get_latency_property (agg));
2069 case PROP_START_TIME_SELECTION:
2070 g_value_set_enum (value, agg->priv->start_time_selection);
2072 case PROP_START_TIME:
2073 g_value_set_uint64 (value, agg->priv->start_time);
2076 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2081 /* GObject vmethods implementations */
2083 gst_aggregator_class_init (GstAggregatorClass * klass)
2085 GObjectClass *gobject_class = (GObjectClass *) klass;
2086 GstElementClass *gstelement_class = (GstElementClass *) klass;
2088 aggregator_parent_class = g_type_class_peek_parent (klass);
2089 g_type_class_add_private (klass, sizeof (GstAggregatorPrivate));
2091 GST_DEBUG_CATEGORY_INIT (aggregator_debug, "aggregator",
2092 GST_DEBUG_FG_MAGENTA, "GstAggregator");
2094 klass->sinkpads_type = GST_TYPE_AGGREGATOR_PAD;
2096 klass->sink_event = gst_aggregator_default_sink_event;
2097 klass->sink_query = gst_aggregator_default_sink_query;
2099 klass->src_event = gst_aggregator_default_src_event;
2100 klass->src_query = gst_aggregator_default_src_query;
2102 klass->create_new_pad = gst_aggregator_default_create_new_pad;
2103 klass->update_src_caps = gst_aggregator_default_update_src_caps;
2104 klass->fixate_src_caps = gst_aggregator_default_fixate_src_caps;
2105 klass->negotiated_src_caps = gst_aggregator_default_negotiated_src_caps;
2107 gstelement_class->request_new_pad =
2108 GST_DEBUG_FUNCPTR (gst_aggregator_request_new_pad);
2109 gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_aggregator_send_event);
2110 gstelement_class->release_pad =
2111 GST_DEBUG_FUNCPTR (gst_aggregator_release_pad);
2112 gstelement_class->change_state =
2113 GST_DEBUG_FUNCPTR (gst_aggregator_change_state);
2115 gobject_class->set_property = gst_aggregator_set_property;
2116 gobject_class->get_property = gst_aggregator_get_property;
2117 gobject_class->finalize = gst_aggregator_finalize;
2119 g_object_class_install_property (gobject_class, PROP_LATENCY,
2120 g_param_spec_int64 ("latency", "Buffer latency",
2121 "Additional latency in live mode to allow upstream "
2122 "to take longer to produce buffers for the current "
2123 "position (in nanoseconds)", 0,
2124 (G_MAXLONG == G_MAXINT64) ? G_MAXINT64 : (G_MAXLONG * GST_SECOND - 1),
2125 DEFAULT_LATENCY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2127 g_object_class_install_property (gobject_class, PROP_START_TIME_SELECTION,
2128 g_param_spec_enum ("start-time-selection", "Start Time Selection",
2129 "Decides which start time is output",
2130 gst_aggregator_start_time_selection_get_type (),
2131 DEFAULT_START_TIME_SELECTION,
2132 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2134 g_object_class_install_property (gobject_class, PROP_START_TIME,
2135 g_param_spec_uint64 ("start-time", "Start Time",
2136 "Start time to use if start-time-selection=set", 0,
2138 DEFAULT_START_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2140 GST_DEBUG_REGISTER_FUNCPTR (gst_aggregator_stop_pad);
2144 gst_aggregator_init (GstAggregator * self, GstAggregatorClass * klass)
2146 GstPadTemplate *pad_template;
2147 GstAggregatorPrivate *priv;
2149 g_return_if_fail (klass->aggregate != NULL);
2152 G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_AGGREGATOR,
2153 GstAggregatorPrivate);
2158 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "src");
2159 g_return_if_fail (pad_template != NULL);
2161 priv->max_padserial = -1;
2162 priv->tags_changed = FALSE;
2164 self->priv->peer_latency_live = FALSE;
2165 self->priv->peer_latency_min = self->priv->sub_latency_min = 0;
2166 self->priv->peer_latency_max = self->priv->sub_latency_max = 0;
2167 self->priv->has_peer_latency = FALSE;
2168 gst_aggregator_reset_flow_values (self);
2170 self->srcpad = gst_pad_new_from_template (pad_template, "src");
2172 gst_pad_set_event_function (self->srcpad,
2173 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_event_func));
2174 gst_pad_set_query_function (self->srcpad,
2175 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_query_func));
2176 gst_pad_set_activatemode_function (self->srcpad,
2177 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_activate_mode_func));
2179 gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
2181 self->priv->latency = DEFAULT_LATENCY;
2182 self->priv->start_time_selection = DEFAULT_START_TIME_SELECTION;
2183 self->priv->start_time = DEFAULT_START_TIME;
2185 g_mutex_init (&self->priv->src_lock);
2186 g_cond_init (&self->priv->src_cond);
2189 /* we can't use G_DEFINE_ABSTRACT_TYPE because we need the klass in the _init
2190 * method to get to the padtemplates */
2192 gst_aggregator_get_type (void)
2194 static volatile gsize type = 0;
2196 if (g_once_init_enter (&type)) {
2198 static const GTypeInfo info = {
2199 sizeof (GstAggregatorClass),
2202 (GClassInitFunc) gst_aggregator_class_init,
2205 sizeof (GstAggregator),
2207 (GInstanceInitFunc) gst_aggregator_init,
2210 _type = g_type_register_static (GST_TYPE_ELEMENT,
2211 "GstAggregator", &info, G_TYPE_FLAG_ABSTRACT);
2212 g_once_init_leave (&type, _type);
2217 /* Must be called with SRC lock and PAD lock held */
2219 gst_aggregator_pad_has_space (GstAggregator * self, GstAggregatorPad * aggpad)
2221 /* Empty queue always has space */
2222 if (aggpad->priv->num_buffers == 0 && aggpad->priv->clipped_buffer == NULL)
2225 /* We also want at least two buffers, one is being processed and one is ready
2226 * for the next iteration when we operate in live mode. */
2227 if (self->priv->peer_latency_live && aggpad->priv->num_buffers < 2)
2230 /* zero latency, if there is a buffer, it's full */
2231 if (self->priv->latency == 0)
2234 /* Allow no more buffers than the latency */
2235 return (aggpad->priv->time_level <= self->priv->latency);
2238 /* Must be called with the PAD_LOCK held */
2240 apply_buffer (GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head)
2242 GstClockTime timestamp;
2244 if (GST_BUFFER_DTS_IS_VALID (buffer))
2245 timestamp = GST_BUFFER_DTS (buffer);
2247 timestamp = GST_BUFFER_PTS (buffer);
2249 if (timestamp == GST_CLOCK_TIME_NONE) {
2251 timestamp = aggpad->priv->head_position;
2253 timestamp = aggpad->priv->tail_position;
2257 if (GST_BUFFER_DURATION_IS_VALID (buffer))
2258 timestamp += GST_BUFFER_DURATION (buffer);
2261 aggpad->priv->head_position = timestamp;
2263 aggpad->priv->tail_position = timestamp;
2265 update_time_level (aggpad, head);
2268 static GstFlowReturn
2269 gst_aggregator_pad_chain_internal (GstAggregator * self,
2270 GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head)
2272 GstFlowReturn flow_return;
2273 GstClockTime buf_pts;
2275 GST_DEBUG_OBJECT (aggpad, "Start chaining a buffer %" GST_PTR_FORMAT, buffer);
2277 PAD_FLUSH_LOCK (aggpad);
2280 flow_return = aggpad->priv->flow_return;
2281 if (flow_return != GST_FLOW_OK)
2284 if (aggpad->priv->pending_eos == TRUE)
2287 PAD_UNLOCK (aggpad);
2289 buf_pts = GST_BUFFER_PTS (buffer);
2293 GST_OBJECT_LOCK (self);
2296 if (aggpad->priv->first_buffer) {
2297 self->priv->has_peer_latency = FALSE;
2298 aggpad->priv->first_buffer = FALSE;
2301 if (gst_aggregator_pad_has_space (self, aggpad)
2302 && aggpad->priv->flow_return == GST_FLOW_OK) {
2304 g_queue_push_head (&aggpad->priv->buffers, buffer);
2306 g_queue_push_tail (&aggpad->priv->buffers, buffer);
2307 apply_buffer (aggpad, buffer, head);
2308 aggpad->priv->num_buffers++;
2310 SRC_BROADCAST (self);
2314 flow_return = aggpad->priv->flow_return;
2315 if (flow_return != GST_FLOW_OK) {
2316 GST_OBJECT_UNLOCK (self);
2320 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
2321 GST_OBJECT_UNLOCK (self);
2323 PAD_WAIT_EVENT (aggpad);
2325 PAD_UNLOCK (aggpad);
2328 if (self->priv->first_buffer) {
2329 GstClockTime start_time;
2331 switch (self->priv->start_time_selection) {
2332 case GST_AGGREGATOR_START_TIME_SELECTION_ZERO:
2336 case GST_AGGREGATOR_START_TIME_SELECTION_FIRST:
2337 GST_OBJECT_LOCK (aggpad);
2338 if (aggpad->priv->head_segment.format == GST_FORMAT_TIME) {
2339 start_time = buf_pts;
2340 if (start_time != -1) {
2341 start_time = MAX (start_time, aggpad->priv->head_segment.start);
2343 gst_segment_to_running_time (&aggpad->priv->head_segment,
2344 GST_FORMAT_TIME, start_time);
2348 GST_WARNING_OBJECT (aggpad,
2349 "Ignoring request of selecting the first start time "
2350 "as the segment is a %s segment instead of a time segment",
2351 gst_format_get_name (aggpad->segment.format));
2353 GST_OBJECT_UNLOCK (aggpad);
2355 case GST_AGGREGATOR_START_TIME_SELECTION_SET:
2356 start_time = self->priv->start_time;
2357 if (start_time == -1)
2362 if (start_time != -1) {
2363 if (self->segment.position == -1)
2364 self->segment.position = start_time;
2366 self->segment.position = MIN (start_time, self->segment.position);
2368 GST_DEBUG_OBJECT (self, "Selecting start time %" GST_TIME_FORMAT,
2369 GST_TIME_ARGS (start_time));
2373 PAD_UNLOCK (aggpad);
2374 GST_OBJECT_UNLOCK (self);
2377 PAD_FLUSH_UNLOCK (aggpad);
2379 GST_DEBUG_OBJECT (aggpad, "Done chaining");
2384 PAD_UNLOCK (aggpad);
2385 PAD_FLUSH_UNLOCK (aggpad);
2387 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping buffer",
2388 gst_flow_get_name (flow_return));
2390 gst_buffer_unref (buffer);
2395 PAD_UNLOCK (aggpad);
2396 PAD_FLUSH_UNLOCK (aggpad);
2398 gst_buffer_unref (buffer);
2399 GST_DEBUG_OBJECT (aggpad, "We are EOS already...");
2401 return GST_FLOW_EOS;
2404 static GstFlowReturn
2405 gst_aggregator_pad_chain (GstPad * pad, GstObject * object, GstBuffer * buffer)
2407 return gst_aggregator_pad_chain_internal (GST_AGGREGATOR_CAST (object),
2408 GST_AGGREGATOR_PAD_CAST (pad), buffer, TRUE);
2412 gst_aggregator_pad_query_func (GstPad * pad, GstObject * parent,
2415 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2416 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2418 if (GST_QUERY_IS_SERIALIZED (query)) {
2421 while (!gst_aggregator_pad_queue_is_empty (aggpad)
2422 && aggpad->priv->flow_return == GST_FLOW_OK) {
2423 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
2424 PAD_WAIT_EVENT (aggpad);
2427 if (aggpad->priv->flow_return != GST_FLOW_OK)
2430 PAD_UNLOCK (aggpad);
2433 return klass->sink_query (GST_AGGREGATOR (parent),
2434 GST_AGGREGATOR_PAD (pad), query);
2437 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping query",
2438 gst_flow_get_name (aggpad->priv->flow_return));
2439 PAD_UNLOCK (aggpad);
2443 static GstFlowReturn
2444 gst_aggregator_pad_event_func (GstPad * pad, GstObject * parent,
2447 GstFlowReturn ret = GST_FLOW_OK;
2448 GstAggregator *self = GST_AGGREGATOR (parent);
2449 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2450 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2452 if (GST_EVENT_IS_SERIALIZED (event) && GST_EVENT_TYPE (event) != GST_EVENT_EOS
2453 /* && GST_EVENT_TYPE (event) != GST_EVENT_SEGMENT_DONE */ ) {
2457 if (aggpad->priv->flow_return != GST_FLOW_OK
2458 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
2459 ret = aggpad->priv->flow_return;
2463 if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
2464 GST_OBJECT_LOCK (aggpad);
2465 gst_event_copy_segment (event, &aggpad->priv->head_segment);
2466 aggpad->priv->head_position = aggpad->priv->head_segment.position;
2467 update_time_level (aggpad, TRUE);
2468 GST_OBJECT_UNLOCK (aggpad);
2471 if (GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
2472 GST_DEBUG_OBJECT (aggpad, "Store event in queue: %" GST_PTR_FORMAT,
2474 g_queue_push_head (&aggpad->priv->buffers, event);
2476 SRC_BROADCAST (self);
2478 PAD_UNLOCK (aggpad);
2483 gboolean is_caps = (GST_EVENT_TYPE (event) == GST_EVENT_CAPS);
2485 if (!klass->sink_event (self, aggpad, event)) {
2486 /* Copied from GstPad to convert boolean to a GstFlowReturn in
2487 * the event handling func */
2488 ret = is_caps ? GST_FLOW_NOT_NEGOTIATED : GST_FLOW_ERROR;
2495 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping event",
2496 gst_flow_get_name (aggpad->priv->flow_return));
2497 PAD_UNLOCK (aggpad);
2499 if (GST_EVENT_IS_STICKY (event))
2500 gst_pad_store_sticky_event (pad, event);
2501 gst_event_unref (event);
2507 gst_aggregator_pad_activate_mode_func (GstPad * pad,
2508 GstObject * parent, GstPadMode mode, gboolean active)
2510 GstAggregator *self = GST_AGGREGATOR (parent);
2511 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2513 if (active == FALSE) {
2515 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, TRUE);
2516 SRC_BROADCAST (self);
2520 aggpad->priv->flow_return = GST_FLOW_OK;
2521 PAD_BROADCAST_EVENT (aggpad);
2522 PAD_UNLOCK (aggpad);
2528 /***********************************
2529 * GstAggregatorPad implementation *
2530 ************************************/
2531 G_DEFINE_TYPE (GstAggregatorPad, gst_aggregator_pad, GST_TYPE_PAD);
2534 gst_aggregator_pad_constructed (GObject * object)
2536 GstPad *pad = GST_PAD (object);
2538 gst_pad_set_chain_function (pad,
2539 GST_DEBUG_FUNCPTR (gst_aggregator_pad_chain));
2540 gst_pad_set_event_full_function_full (pad,
2541 GST_DEBUG_FUNCPTR (gst_aggregator_pad_event_func), NULL, NULL);
2542 gst_pad_set_query_function (pad,
2543 GST_DEBUG_FUNCPTR (gst_aggregator_pad_query_func));
2544 gst_pad_set_activatemode_function (pad,
2545 GST_DEBUG_FUNCPTR (gst_aggregator_pad_activate_mode_func));
2549 gst_aggregator_pad_finalize (GObject * object)
2551 GstAggregatorPad *pad = (GstAggregatorPad *) object;
2553 g_cond_clear (&pad->priv->event_cond);
2554 g_mutex_clear (&pad->priv->flush_lock);
2555 g_mutex_clear (&pad->priv->lock);
2557 G_OBJECT_CLASS (gst_aggregator_pad_parent_class)->finalize (object);
2561 gst_aggregator_pad_dispose (GObject * object)
2563 GstAggregatorPad *pad = (GstAggregatorPad *) object;
2565 gst_aggregator_pad_set_flushing (pad, GST_FLOW_FLUSHING, TRUE);
2567 G_OBJECT_CLASS (gst_aggregator_pad_parent_class)->dispose (object);
2571 gst_aggregator_pad_class_init (GstAggregatorPadClass * klass)
2573 GObjectClass *gobject_class = (GObjectClass *) klass;
2575 g_type_class_add_private (klass, sizeof (GstAggregatorPadPrivate));
2577 gobject_class->constructed = gst_aggregator_pad_constructed;
2578 gobject_class->finalize = gst_aggregator_pad_finalize;
2579 gobject_class->dispose = gst_aggregator_pad_dispose;
2583 gst_aggregator_pad_init (GstAggregatorPad * pad)
2586 G_TYPE_INSTANCE_GET_PRIVATE (pad, GST_TYPE_AGGREGATOR_PAD,
2587 GstAggregatorPadPrivate);
2589 g_queue_init (&pad->priv->buffers);
2590 g_cond_init (&pad->priv->event_cond);
2592 g_mutex_init (&pad->priv->flush_lock);
2593 g_mutex_init (&pad->priv->lock);
2595 gst_aggregator_pad_reset_unlocked (pad);
2598 /* Must be called with the PAD_LOCK held */
2600 gst_aggregator_pad_buffer_consumed (GstAggregatorPad * pad)
2602 pad->priv->num_buffers--;
2603 GST_TRACE_OBJECT (pad, "Consuming buffer");
2604 if (gst_aggregator_pad_queue_is_empty (pad) && pad->priv->pending_eos) {
2605 pad->priv->pending_eos = FALSE;
2606 pad->priv->eos = TRUE;
2608 PAD_BROADCAST_EVENT (pad);
2611 /* Must be called with the PAD_LOCK held */
2613 gst_aggregator_pad_clip_buffer_unlocked (GstAggregatorPad * pad)
2615 GstAggregator *self = NULL;
2616 GstAggregatorClass *aggclass;
2617 GstBuffer *buffer = NULL;
2619 while (pad->priv->clipped_buffer == NULL &&
2620 GST_IS_BUFFER (g_queue_peek_tail (&pad->priv->buffers))) {
2621 buffer = g_queue_pop_tail (&pad->priv->buffers);
2623 apply_buffer (pad, buffer, FALSE);
2625 /* We only take the parent here so that it's not taken if the buffer is
2626 * already clipped or if the queue is empty.
2629 self = GST_AGGREGATOR (gst_pad_get_parent_element (GST_PAD (pad)));
2631 gst_buffer_unref (buffer);
2635 aggclass = GST_AGGREGATOR_GET_CLASS (self);
2638 if (aggclass->clip) {
2639 GST_TRACE_OBJECT (pad, "Clipping: %" GST_PTR_FORMAT, buffer);
2641 buffer = aggclass->clip (self, pad, buffer);
2643 if (buffer == NULL) {
2644 gst_aggregator_pad_buffer_consumed (pad);
2645 GST_TRACE_OBJECT (pad, "Clipping consumed the buffer");
2649 pad->priv->clipped_buffer = buffer;
2653 gst_object_unref (self);
2657 * gst_aggregator_pad_steal_buffer:
2658 * @pad: the pad to get buffer from
2660 * Steal the ref to the buffer currently queued in @pad.
2662 * Returns: (transfer full): The buffer in @pad or NULL if no buffer was
2663 * queued. You should unref the buffer after usage.
2666 gst_aggregator_pad_steal_buffer (GstAggregatorPad * pad)
2672 gst_aggregator_pad_clip_buffer_unlocked (pad);
2674 buffer = pad->priv->clipped_buffer;
2675 pad->priv->clipped_buffer = NULL;
2678 gst_aggregator_pad_buffer_consumed (pad);
2679 GST_DEBUG_OBJECT (pad, "Consumed: %" GST_PTR_FORMAT, buffer);
2688 * gst_aggregator_pad_drop_buffer:
2689 * @pad: the pad where to drop any pending buffer
2691 * Drop the buffer currently queued in @pad.
2693 * Returns: TRUE if there was a buffer queued in @pad, or FALSE if not.
2696 gst_aggregator_pad_drop_buffer (GstAggregatorPad * pad)
2700 buf = gst_aggregator_pad_steal_buffer (pad);
2705 gst_buffer_unref (buf);
2710 * gst_aggregator_pad_get_buffer:
2711 * @pad: the pad to get buffer from
2713 * Returns: (transfer full): A reference to the buffer in @pad or
2714 * NULL if no buffer was queued. You should unref the buffer after
2718 gst_aggregator_pad_get_buffer (GstAggregatorPad * pad)
2724 gst_aggregator_pad_clip_buffer_unlocked (pad);
2726 if (pad->priv->clipped_buffer) {
2727 buffer = gst_buffer_ref (pad->priv->clipped_buffer);
2737 gst_aggregator_pad_is_eos (GstAggregatorPad * pad)
2742 is_eos = pad->priv->eos;
2749 * gst_aggregator_merge_tags:
2750 * @self: a #GstAggregator
2751 * @tags: a #GstTagList to merge
2752 * @mode: the #GstTagMergeMode to use
2754 * Adds tags to so-called pending tags, which will be processed
2755 * before pushing out data downstream.
2757 * Note that this is provided for convenience, and the subclass is
2758 * not required to use this and can still do tag handling on its own.
2763 gst_aggregator_merge_tags (GstAggregator * self,
2764 const GstTagList * tags, GstTagMergeMode mode)
2768 g_return_if_fail (GST_IS_AGGREGATOR (self));
2769 g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
2771 /* FIXME Check if we can use OBJECT lock here! */
2772 GST_OBJECT_LOCK (self);
2774 GST_DEBUG_OBJECT (self, "merging tags %" GST_PTR_FORMAT, tags);
2775 otags = self->priv->tags;
2776 self->priv->tags = gst_tag_list_merge (self->priv->tags, tags, mode);
2778 gst_tag_list_unref (otags);
2779 self->priv->tags_changed = TRUE;
2780 GST_OBJECT_UNLOCK (self);
2784 * gst_aggregator_set_latency:
2785 * @self: a #GstAggregator
2786 * @min_latency: minimum latency
2787 * @max_latency: maximum latency
2789 * Lets #GstAggregator sub-classes tell the baseclass what their internal
2790 * latency is. Will also post a LATENCY message on the bus so the pipeline
2791 * can reconfigure its global latency.
2794 gst_aggregator_set_latency (GstAggregator * self,
2795 GstClockTime min_latency, GstClockTime max_latency)
2797 gboolean changed = FALSE;
2799 g_return_if_fail (GST_IS_AGGREGATOR (self));
2800 g_return_if_fail (GST_CLOCK_TIME_IS_VALID (min_latency));
2801 g_return_if_fail (max_latency >= min_latency);
2804 if (self->priv->sub_latency_min != min_latency) {
2805 self->priv->sub_latency_min = min_latency;
2808 if (self->priv->sub_latency_max != max_latency) {
2809 self->priv->sub_latency_max = max_latency;
2814 SRC_BROADCAST (self);
2818 gst_element_post_message (GST_ELEMENT_CAST (self),
2819 gst_message_new_latency (GST_OBJECT_CAST (self)));