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. Implementers should at least implement
33 * the aggregate () vmethod.
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
64 #include <string.h> /* strlen */
66 #include "gstaggregator.h"
69 /* Might become API */
70 static void gst_aggregator_merge_tags (GstAggregator * aggregator,
71 const GstTagList * tags, GstTagMergeMode mode);
72 static void gst_aggregator_set_latency_property (GstAggregator * agg,
74 static gint64 gst_aggregator_get_latency_property (GstAggregator * agg);
77 GST_DEBUG_CATEGORY_STATIC (aggregator_debug);
78 #define GST_CAT_DEFAULT aggregator_debug
80 /* GstAggregatorPad definitions */
81 #define PAD_LOCK_EVENT(pad) G_STMT_START { \
82 GST_LOG_OBJECT (pad, "Taking EVENT lock from thread %p", \
84 g_mutex_lock(&pad->priv->event_lock); \
85 GST_LOG_OBJECT (pad, "Took EVENT lock from thread %p", \
89 #define PAD_UNLOCK_EVENT(pad) G_STMT_START { \
90 GST_LOG_OBJECT (pad, "Releasing EVENT lock from thread %p", \
92 g_mutex_unlock(&pad->priv->event_lock); \
93 GST_LOG_OBJECT (pad, "Release EVENT lock from thread %p", \
98 #define PAD_WAIT_EVENT(pad) G_STMT_START { \
99 GST_LOG_OBJECT (pad, "Waiting for EVENT on thread %p", \
101 g_cond_wait(&(((GstAggregatorPad* )pad)->priv->event_cond), \
102 &(pad->priv->event_lock)); \
103 GST_LOG_OBJECT (pad, "DONE Waiting for EVENT on thread %p", \
107 #define PAD_BROADCAST_EVENT(pad) { \
108 GST_LOG_OBJECT (pad, "Signaling EVENT from thread %p", \
110 g_cond_broadcast(&(((GstAggregatorPad* )pad)->priv->event_cond)); \
113 #define GST_AGGREGATOR_SETCAPS_LOCK(self) G_STMT_START { \
114 GST_LOG_OBJECT (self, "Taking SETCAPS lock from thread %p", \
116 g_mutex_lock(&self->priv->setcaps_lock); \
117 GST_LOG_OBJECT (self, "Took SETCAPS lock from thread %p", \
121 #define GST_AGGREGATOR_SETCAPS_UNLOCK(self) G_STMT_START { \
122 GST_LOG_OBJECT (self, "Releasing SETCAPS lock from thread %p", \
124 g_mutex_unlock(&self->priv->setcaps_lock); \
125 GST_LOG_OBJECT (self, "Took SETCAPS lock from thread %p", \
129 #define PAD_STREAM_LOCK(pad) G_STMT_START { \
130 GST_LOG_OBJECT (pad, "Taking lock from thread %p", \
132 g_mutex_lock(&pad->priv->stream_lock); \
133 GST_LOG_OBJECT (pad, "Took lock from thread %p", \
137 #define PAD_STREAM_UNLOCK(pad) G_STMT_START { \
138 GST_LOG_OBJECT (pad, "Releasing lock from thread %p", \
140 g_mutex_unlock(&pad->priv->stream_lock); \
141 GST_LOG_OBJECT (pad, "Release lock from thread %p", \
145 #define SRC_STREAM_LOCK(self) G_STMT_START { \
146 GST_LOG_OBJECT (self, "Taking src STREAM lock from thread %p", \
148 g_mutex_lock(&self->priv->src_lock); \
149 GST_LOG_OBJECT (self, "Took src STREAM lock from thread %p", \
153 #define SRC_STREAM_UNLOCK(self) G_STMT_START { \
154 GST_LOG_OBJECT (self, "Releasing src STREAM lock from thread %p", \
156 g_mutex_unlock(&self->priv->src_lock); \
157 GST_LOG_OBJECT (self, "Release src STREAM lock from thread %p", \
161 #define SRC_STREAM_WAIT(self) G_STMT_START { \
162 GST_LOG_OBJECT (self, "Waiting for src STREAM on thread %p", \
164 g_cond_wait(&(self->priv->src_cond), &(self->priv->src_lock)); \
165 GST_LOG_OBJECT (self, "DONE Waiting for src STREAM on thread %p", \
169 #define SRC_STREAM_BROADCAST(self) G_STMT_START { \
170 SRC_STREAM_LOCK (self); \
171 GST_LOG_OBJECT (self, "Signaling src STREAM from thread %p", \
173 if (self->priv->aggregate_id) \
174 gst_clock_id_unschedule (self->priv->aggregate_id); \
175 g_cond_broadcast(&(self->priv->src_cond)); \
176 SRC_STREAM_UNLOCK (self); \
179 struct _GstAggregatorPadPrivate
181 gboolean pending_flush_start;
182 gboolean pending_flush_stop;
183 gboolean pending_eos;
193 _aggpad_flush (GstAggregatorPad * aggpad, GstAggregator * agg)
195 GstAggregatorPadClass *klass = GST_AGGREGATOR_PAD_GET_CLASS (aggpad);
198 aggpad->priv->flushing = FALSE;
201 return klass->flush (aggpad, agg);
206 /*************************************
207 * GstAggregator implementation *
208 *************************************/
209 static GstElementClass *aggregator_parent_class = NULL;
211 struct _GstAggregatorPrivate
215 /* Our state is >= PAUSED */
220 gboolean send_stream_start;
221 gboolean send_segment;
222 gboolean flush_seeking;
223 gboolean pending_flush_start;
225 GstFlowReturn flow_return;
230 gboolean tags_changed;
232 /* Lock to prevent two src setcaps from happening at the same time */
235 gboolean latency_live;
236 GstClockTime latency_min;
237 GstClockTime latency_max;
239 GstClockTime sub_latency_min;
240 GstClockTime sub_latency_max;
243 GstClockID aggregate_id;
254 gboolean one_actually_seeked;
257 #define DEFAULT_LATENCY 0
267 * gst_aggregator_iterate_sinkpads:
268 * @self: The #GstAggregator
269 * @func: The function to call.
270 * @user_data: The data to pass to @func.
272 * Iterate the sinkpads of aggregator to call a function on them.
274 * This method guarantees that @func will be called only once for each
278 gst_aggregator_iterate_sinkpads (GstAggregator * self,
279 GstAggregatorPadForeachFunc func, gpointer user_data)
281 gboolean result = FALSE;
283 gboolean done = FALSE;
284 GValue item = { 0, };
285 GList *seen_pads = NULL;
287 iter = gst_element_iterate_sink_pads (GST_ELEMENT (self));
293 switch (gst_iterator_next (iter, &item)) {
294 case GST_ITERATOR_OK:
298 pad = g_value_get_object (&item);
300 /* if already pushed, skip. FIXME, find something faster to tag pads */
301 if (pad == NULL || g_list_find (seen_pads, pad)) {
302 g_value_reset (&item);
306 GST_LOG_OBJECT (self, "calling function on pad %s:%s",
307 GST_DEBUG_PAD_NAME (pad));
308 result = func (self, pad, user_data);
312 seen_pads = g_list_prepend (seen_pads, pad);
314 g_value_reset (&item);
317 case GST_ITERATOR_RESYNC:
318 gst_iterator_resync (iter);
320 case GST_ITERATOR_ERROR:
321 GST_ERROR_OBJECT (self,
322 "Could not iterate over internally linked pads");
325 case GST_ITERATOR_DONE:
330 g_value_unset (&item);
331 gst_iterator_free (iter);
333 if (seen_pads == NULL) {
334 GST_DEBUG_OBJECT (self, "No pad seen");
338 g_list_free (seen_pads);
344 static inline gboolean
345 _check_all_pads_with_data_or_eos (GstAggregator * self,
346 GstAggregatorPad * aggpad, gpointer user_data)
348 if (aggpad->buffer || aggpad->eos) {
352 GST_LOG_OBJECT (aggpad, "Not ready to be aggregated");
358 _reset_flow_values (GstAggregator * self)
360 self->priv->flow_return = GST_FLOW_FLUSHING;
361 self->priv->send_stream_start = TRUE;
362 self->priv->send_segment = TRUE;
363 gst_segment_init (&self->segment, GST_FORMAT_TIME);
367 _push_mandatory_events (GstAggregator * self)
369 GstAggregatorPrivate *priv = self->priv;
371 if (g_atomic_int_get (&self->priv->send_stream_start)) {
374 GST_INFO_OBJECT (self, "pushing stream start");
375 /* stream-start (FIXME: create id based on input ids) */
376 g_snprintf (s_id, sizeof (s_id), "agg-%08x", g_random_int ());
377 if (!gst_pad_push_event (self->srcpad, gst_event_new_stream_start (s_id))) {
378 GST_WARNING_OBJECT (self->srcpad, "Sending stream start event failed");
380 g_atomic_int_set (&self->priv->send_stream_start, FALSE);
383 if (self->priv->srccaps) {
385 GST_INFO_OBJECT (self, "pushing caps: %" GST_PTR_FORMAT,
386 self->priv->srccaps);
387 if (!gst_pad_push_event (self->srcpad,
388 gst_event_new_caps (self->priv->srccaps))) {
389 GST_WARNING_OBJECT (self->srcpad, "Sending caps event failed");
391 gst_caps_unref (self->priv->srccaps);
392 self->priv->srccaps = NULL;
395 if (g_atomic_int_get (&self->priv->send_segment)) {
396 if (!g_atomic_int_get (&self->priv->flush_seeking)) {
397 GstEvent *segev = gst_event_new_segment (&self->segment);
399 if (!self->priv->seqnum)
400 self->priv->seqnum = gst_event_get_seqnum (segev);
402 gst_event_set_seqnum (segev, self->priv->seqnum);
404 GST_DEBUG_OBJECT (self, "pushing segment %" GST_PTR_FORMAT, segev);
405 gst_pad_push_event (self->srcpad, segev);
406 g_atomic_int_set (&self->priv->send_segment, FALSE);
410 if (priv->tags && priv->tags_changed) {
411 gst_pad_push_event (self->srcpad,
412 gst_event_new_tag (gst_tag_list_ref (priv->tags)));
413 priv->tags_changed = FALSE;
418 * gst_aggregator_set_src_caps:
419 * @self: The #GstAggregator
420 * @caps: The #GstCaps to set on the src pad.
422 * Sets the caps to be used on the src pad.
425 gst_aggregator_set_src_caps (GstAggregator * self, GstCaps * caps)
427 GST_AGGREGATOR_SETCAPS_LOCK (self);
428 gst_caps_replace (&self->priv->srccaps, caps);
429 _push_mandatory_events (self);
430 GST_AGGREGATOR_SETCAPS_UNLOCK (self);
434 * gst_aggregator_finish_buffer:
435 * @self: The #GstAggregator
436 * @buffer: the #GstBuffer to push.
438 * This method will take care of sending mandatory events before pushing
439 * the provided buffer.
442 gst_aggregator_finish_buffer (GstAggregator * self, GstBuffer * buffer)
444 _push_mandatory_events (self);
446 if (!g_atomic_int_get (&self->priv->flush_seeking) &&
447 gst_pad_is_active (self->srcpad)) {
448 GST_TRACE_OBJECT (self, "pushing buffer %" GST_PTR_FORMAT, buffer);
449 return gst_pad_push (self->srcpad, buffer);
451 GST_INFO_OBJECT (self, "Not pushing (active: %i, flushing: %i)",
452 g_atomic_int_get (&self->priv->flush_seeking),
453 gst_pad_is_active (self->srcpad));
454 gst_buffer_unref (buffer);
460 _push_eos (GstAggregator * self)
463 _push_mandatory_events (self);
465 self->priv->send_eos = FALSE;
466 event = gst_event_new_eos ();
467 gst_event_set_seqnum (event, self->priv->seqnum);
468 gst_pad_push_event (self->srcpad, event);
472 gst_aggregator_get_next_time (GstAggregator * self)
474 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
476 if (klass->get_next_time)
477 return klass->get_next_time (self);
479 return GST_CLOCK_TIME_NONE;
482 /* called with the src STREAM lock */
484 _wait_and_check (GstAggregator * self, gboolean * timeout)
486 GstClockTime latency_max, latency_min;
492 gst_aggregator_get_latency (self, &live, &latency_min, &latency_max);
494 if (gst_aggregator_iterate_sinkpads (self,
495 (GstAggregatorPadForeachFunc) _check_all_pads_with_data_or_eos,
497 GST_DEBUG_OBJECT (self, "all pads have data");
501 SRC_STREAM_LOCK (self);
503 /* Before waiting, check if we're actually still running */
504 if (!self->priv->running || !self->priv->send_eos) {
505 SRC_STREAM_UNLOCK (self);
510 start = gst_aggregator_get_next_time (self);
512 if (!live || !GST_IS_CLOCK (GST_ELEMENT_CLOCK (self))
513 || !GST_CLOCK_TIME_IS_VALID (start)) {
514 /* We wake up here when something happened, and below
515 * then check if we're ready now. If we return FALSE,
516 * we will be directly called again.
518 SRC_STREAM_WAIT (self);
520 GstClockTime base_time, time;
522 GstClockReturn status;
524 GST_DEBUG_OBJECT (self, "got subclass start time: %" GST_TIME_FORMAT,
525 GST_TIME_ARGS (start));
527 GST_OBJECT_LOCK (self);
528 base_time = GST_ELEMENT_CAST (self)->base_time;
529 clock = GST_ELEMENT_CLOCK (self);
531 gst_object_ref (clock);
532 GST_OBJECT_UNLOCK (self);
534 time = base_time + start;
536 if (GST_CLOCK_TIME_IS_VALID (latency_max)) {
538 } else if (GST_CLOCK_TIME_IS_VALID (latency_min)) {
541 time += self->latency;
544 GST_DEBUG_OBJECT (self, "possibly waiting for clock to reach %"
545 GST_TIME_FORMAT " (base %" GST_TIME_FORMAT " start %" GST_TIME_FORMAT
546 " latency max %" GST_TIME_FORMAT " latency min %" GST_TIME_FORMAT
547 " current %" GST_TIME_FORMAT ")", GST_TIME_ARGS (time),
548 GST_TIME_ARGS (GST_ELEMENT_CAST (self)->base_time),
549 GST_TIME_ARGS (start), GST_TIME_ARGS (latency_max),
550 GST_TIME_ARGS (latency_min),
551 GST_TIME_ARGS (gst_clock_get_time (clock)));
553 self->priv->aggregate_id = gst_clock_new_single_shot_id (clock, time);
554 gst_object_unref (clock);
555 SRC_STREAM_UNLOCK (self);
557 status = gst_clock_id_wait (self->priv->aggregate_id, NULL);
559 SRC_STREAM_LOCK (self);
560 if (self->priv->aggregate_id) {
561 gst_clock_id_unref (self->priv->aggregate_id);
562 self->priv->aggregate_id = NULL;
565 GST_DEBUG_OBJECT (self, "clock returned %d", status);
568 if (status == GST_CLOCK_OK || status == GST_CLOCK_EARLY) {
569 SRC_STREAM_UNLOCK (self);
574 SRC_STREAM_UNLOCK (self);
576 return gst_aggregator_iterate_sinkpads (self,
577 (GstAggregatorPadForeachFunc) _check_all_pads_with_data_or_eos, NULL);
581 aggregate_func (GstAggregator * self)
583 GstAggregatorPrivate *priv = self->priv;
584 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
585 gboolean timeout = FALSE;
587 if (self->priv->running == FALSE) {
588 GST_DEBUG_OBJECT (self, "Not running anymore");
592 GST_LOG_OBJECT (self, "Checking aggregate");
593 while (priv->send_eos && priv->running) {
594 if (!_wait_and_check (self, &timeout))
597 GST_TRACE_OBJECT (self, "Actually aggregating!");
599 priv->flow_return = klass->aggregate (self, timeout);
601 if (priv->flow_return == GST_FLOW_EOS) {
605 if (priv->flow_return == GST_FLOW_FLUSHING &&
606 g_atomic_int_get (&priv->flush_seeking))
607 priv->flow_return = GST_FLOW_OK;
609 GST_LOG_OBJECT (self, "flow return is %s",
610 gst_flow_get_name (priv->flow_return));
612 if (priv->flow_return != GST_FLOW_OK)
618 _start (GstAggregator * self)
620 self->priv->running = TRUE;
621 self->priv->send_stream_start = TRUE;
622 self->priv->send_segment = TRUE;
623 self->priv->send_eos = TRUE;
624 self->priv->srccaps = NULL;
625 self->priv->flow_return = GST_FLOW_OK;
631 _check_pending_flush_stop (GstAggregatorPad * pad)
633 return (!pad->priv->pending_flush_stop && !pad->priv->pending_flush_start);
637 _stop_srcpad_task (GstAggregator * self, GstEvent * flush_start)
641 GST_INFO_OBJECT (self, "%s srcpad task",
642 flush_start ? "Pausing" : "Stopping");
644 self->priv->running = FALSE;
645 SRC_STREAM_BROADCAST (self);
648 res = gst_pad_push_event (self->srcpad, flush_start);
651 gst_pad_stop_task (self->srcpad);
652 SRC_STREAM_BROADCAST (self);
658 _start_srcpad_task (GstAggregator * self)
660 GST_INFO_OBJECT (self, "Starting srcpad task");
662 self->priv->running = TRUE;
663 gst_pad_start_task (GST_PAD (self->srcpad),
664 (GstTaskFunction) aggregate_func, self, NULL);
668 _flush (GstAggregator * self)
670 GstFlowReturn ret = GST_FLOW_OK;
671 GstAggregatorPrivate *priv = self->priv;
672 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
674 GST_DEBUG_OBJECT (self, "Flushing everything");
675 g_atomic_int_set (&priv->send_segment, TRUE);
676 g_atomic_int_set (&priv->flush_seeking, FALSE);
677 g_atomic_int_set (&priv->tags_changed, FALSE);
679 ret = klass->flush (self);
685 _all_flush_stop_received (GstAggregator * self)
688 GstAggregatorPad *tmppad;
690 GST_OBJECT_LOCK (self);
691 for (tmp = GST_ELEMENT (self)->sinkpads; tmp; tmp = tmp->next) {
692 tmppad = (GstAggregatorPad *) tmp->data;
694 if (_check_pending_flush_stop (tmppad) == FALSE) {
695 GST_DEBUG_OBJECT (tmppad, "Is not last %i -- %i",
696 tmppad->priv->pending_flush_start, tmppad->priv->pending_flush_stop);
697 GST_OBJECT_UNLOCK (self);
701 GST_OBJECT_UNLOCK (self);
707 _flush_start (GstAggregator * self, GstAggregatorPad * aggpad, GstEvent * event)
710 GstAggregatorPrivate *priv = self->priv;
711 GstAggregatorPadPrivate *padpriv = aggpad->priv;
713 g_atomic_int_set (&aggpad->priv->flushing, TRUE);
714 /* Remove pad buffer and wake up the streaming thread */
715 tmpbuf = gst_aggregator_pad_steal_buffer (aggpad);
716 gst_buffer_replace (&tmpbuf, NULL);
717 PAD_STREAM_LOCK (aggpad);
718 if (g_atomic_int_compare_and_exchange (&padpriv->pending_flush_start,
719 TRUE, FALSE) == TRUE) {
720 GST_DEBUG_OBJECT (aggpad, "Expecting FLUSH_STOP now");
721 g_atomic_int_set (&padpriv->pending_flush_stop, TRUE);
724 if (g_atomic_int_get (&priv->flush_seeking)) {
725 /* If flush_seeking we forward the first FLUSH_START */
726 if (g_atomic_int_compare_and_exchange (&priv->pending_flush_start,
727 TRUE, FALSE) == TRUE) {
729 GST_INFO_OBJECT (self, "Flushing, pausing srcpad task");
730 _stop_srcpad_task (self, event);
731 priv->flow_return = GST_FLOW_OK;
733 GST_INFO_OBJECT (self, "Getting STREAM_LOCK while seeking");
734 GST_PAD_STREAM_LOCK (self->srcpad);
735 GST_LOG_OBJECT (self, "GOT STREAM_LOCK");
738 gst_event_unref (event);
741 gst_event_unref (event);
743 PAD_STREAM_UNLOCK (aggpad);
745 tmpbuf = gst_aggregator_pad_steal_buffer (aggpad);
746 gst_buffer_replace (&tmpbuf, NULL);
749 /* GstAggregator vmethods default implementations */
751 _sink_event (GstAggregator * self, GstAggregatorPad * aggpad, GstEvent * event)
754 GstPad *pad = GST_PAD (aggpad);
755 GstAggregatorPrivate *priv = self->priv;
757 switch (GST_EVENT_TYPE (event)) {
758 case GST_EVENT_FLUSH_START:
760 _flush_start (self, aggpad, event);
761 /* We forward only in one case: right after flush_seeking */
765 case GST_EVENT_FLUSH_STOP:
767 GST_DEBUG_OBJECT (aggpad, "Got FLUSH_STOP");
769 _aggpad_flush (aggpad, self);
770 if (g_atomic_int_get (&priv->flush_seeking)) {
771 g_atomic_int_set (&aggpad->priv->pending_flush_stop, FALSE);
773 if (g_atomic_int_get (&priv->flush_seeking)) {
774 if (_all_flush_stop_received (self)) {
775 /* That means we received FLUSH_STOP/FLUSH_STOP on
776 * all sinkpads -- Seeking is Done... sending FLUSH_STOP */
778 gst_pad_push_event (self->srcpad, event);
779 priv->send_eos = TRUE;
781 SRC_STREAM_BROADCAST (self);
783 GST_INFO_OBJECT (self, "Releasing source pad STREAM_LOCK");
784 GST_PAD_STREAM_UNLOCK (self->srcpad);
785 _start_srcpad_task (self);
790 /* We never forward the event */
795 GST_DEBUG_OBJECT (aggpad, "EOS");
797 /* We still have a buffer, and we don't want the subclass to have to
798 * check for it. Mark pending_eos, eos will be set when steal_buffer is
801 PAD_LOCK_EVENT (aggpad);
802 if (!aggpad->buffer) {
805 aggpad->priv->pending_eos = TRUE;
807 PAD_UNLOCK_EVENT (aggpad);
809 SRC_STREAM_BROADCAST (self);
812 case GST_EVENT_SEGMENT:
814 PAD_LOCK_EVENT (aggpad);
815 gst_event_copy_segment (event, &aggpad->segment);
816 self->priv->seqnum = gst_event_get_seqnum (event);
817 PAD_UNLOCK_EVENT (aggpad);
820 case GST_EVENT_STREAM_START:
828 gst_event_parse_tag (event, &tags);
830 if (gst_tag_list_get_scope (tags) == GST_TAG_SCOPE_STREAM) {
831 gst_aggregator_merge_tags (self, tags, GST_TAG_MERGE_REPLACE);
832 gst_event_unref (event);
844 GST_DEBUG_OBJECT (pad, "Forwarding event: %" GST_PTR_FORMAT, event);
845 return gst_pad_event_default (pad, GST_OBJECT (self), event);
848 GST_DEBUG_OBJECT (pad, "Eating event: %" GST_PTR_FORMAT, event);
850 gst_event_unref (event);
856 _stop_pad (GstAggregator * self, GstAggregatorPad * pad, gpointer unused_udata)
858 _aggpad_flush (pad, self);
864 _stop (GstAggregator * agg)
866 _reset_flow_values (agg);
868 gst_aggregator_iterate_sinkpads (agg,
869 (GstAggregatorPadForeachFunc) _stop_pad, NULL);
872 gst_tag_list_unref (agg->priv->tags);
873 agg->priv->tags = NULL;
878 /* GstElement vmethods implementations */
879 static GstStateChangeReturn
880 _change_state (GstElement * element, GstStateChange transition)
882 GstStateChangeReturn ret;
883 GstAggregator *self = GST_AGGREGATOR (element);
884 GstAggregatorClass *agg_class = GST_AGGREGATOR_GET_CLASS (self);
887 switch (transition) {
888 case GST_STATE_CHANGE_READY_TO_PAUSED:
889 agg_class->start (self);
896 GST_ELEMENT_CLASS (aggregator_parent_class)->change_state (element,
897 transition)) == GST_STATE_CHANGE_FAILURE)
901 switch (transition) {
902 case GST_STATE_CHANGE_PAUSED_TO_READY:
903 agg_class->stop (self);
913 GST_ERROR_OBJECT (element, "parent failed state change");
919 _release_pad (GstElement * element, GstPad * pad)
921 GstAggregator *self = GST_AGGREGATOR (element);
924 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
926 GST_INFO_OBJECT (pad, "Removing pad");
928 g_atomic_int_set (&aggpad->priv->flushing, TRUE);
929 tmpbuf = gst_aggregator_pad_steal_buffer (aggpad);
930 gst_buffer_replace (&tmpbuf, NULL);
931 gst_element_remove_pad (element, pad);
933 SRC_STREAM_BROADCAST (self);
937 _request_new_pad (GstElement * element,
938 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
941 GstAggregatorPad *agg_pad;
943 GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
944 GstAggregatorPrivate *priv = GST_AGGREGATOR (element)->priv;
946 self = GST_AGGREGATOR (element);
948 if (templ == gst_element_class_get_pad_template (klass, "sink_%u")) {
952 GST_OBJECT_LOCK (element);
953 if (req_name == NULL || strlen (req_name) < 6
954 || !g_str_has_prefix (req_name, "sink_")) {
955 /* no name given when requesting the pad, use next available int */
958 /* parse serial number from requested padname */
959 serial = g_ascii_strtoull (&req_name[5], NULL, 10);
960 if (serial >= priv->padcount)
961 priv->padcount = serial;
964 name = g_strdup_printf ("sink_%u", priv->padcount);
965 agg_pad = g_object_new (GST_AGGREGATOR_GET_CLASS (self)->sinkpads_type,
966 "name", name, "direction", GST_PAD_SINK, "template", templ, NULL);
969 GST_OBJECT_UNLOCK (element);
975 GST_DEBUG_OBJECT (element, "Adding pad %s", GST_PAD_NAME (agg_pad));
978 gst_pad_set_active (GST_PAD (agg_pad), TRUE);
980 /* add the pad to the element */
981 gst_element_add_pad (element, GST_PAD (agg_pad));
983 return GST_PAD (agg_pad);
988 GstClockTime min, max;
993 _latency_query (GstAggregator * self, GstPad * pad, gpointer user_data)
995 LatencyData *data = user_data;
996 GstClockTime min, max;
1000 query = gst_query_new_latency ();
1001 res = gst_pad_peer_query (pad, query);
1004 gst_query_parse_latency (query, &live, &min, &max);
1006 GST_LOG_OBJECT (self, "got latency live:%s min:%" G_GINT64_FORMAT
1007 " max:%" G_GINT64_FORMAT, live ? "true" : "false", min, max);
1009 if (min > data->min)
1012 if (max != GST_CLOCK_TIME_NONE &&
1013 ((data->max != GST_CLOCK_TIME_NONE && max < data->max) ||
1014 (data->max == GST_CLOCK_TIME_NONE)))
1020 gst_query_unref (query);
1026 * gst_aggregator_get_latency:
1027 * @self: a #GstAggregator
1028 * @live: (out) (allow-none): whether @self is live
1029 * @min_latency: (out) (allow-none): the configured minimum latency of @self
1030 * @max_latency: (out) (allow-none): the configured maximum latency of @self
1032 * Retreives the latency values reported by @self in response to the latency
1035 * Typically only called by subclasses.
1038 gst_aggregator_get_latency (GstAggregator * self, gboolean * live,
1039 GstClockTime * min_latency, GstClockTime * max_latency)
1041 GstClockTime min, max;
1043 g_return_if_fail (GST_IS_AGGREGATOR (self));
1045 min = self->priv->latency_min;
1046 max = self->priv->latency_max;
1048 min += self->priv->sub_latency_min;
1049 if (GST_CLOCK_TIME_IS_VALID (max)
1050 && GST_CLOCK_TIME_IS_VALID (self->priv->sub_latency_max))
1051 max += self->priv->sub_latency_max;
1053 if (GST_CLOCK_TIME_IS_VALID (self->latency)) {
1054 min += self->latency;
1055 if (GST_CLOCK_TIME_IS_VALID (max))
1056 max += self->latency;
1060 *live = self->priv->latency_live;
1068 gst_aggregator_query_latency (GstAggregator * self, GstQuery * query)
1073 data.max = GST_CLOCK_TIME_NONE;
1076 /* query upstream's latency */
1077 gst_aggregator_iterate_sinkpads (self,
1078 (GstAggregatorPadForeachFunc) _latency_query, &data);
1080 if (data.live && GST_CLOCK_TIME_IS_VALID (self->latency) &&
1081 self->latency > data.max) {
1082 GST_ELEMENT_WARNING (self, CORE, NEGOTIATION,
1083 ("%s", "Latency too big"),
1084 ("The requested latency value is too big for the current pipeline. "
1085 "Limiting to %" G_GINT64_FORMAT, data.max));
1086 self->latency = data.max;
1089 if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (data.min))) {
1090 GST_WARNING_OBJECT (self, "Invalid minimum latency, using 0");
1094 self->priv->latency_live = data.live;
1095 self->priv->latency_min = data.min;
1096 self->priv->latency_max = data.max;
1099 if (GST_CLOCK_TIME_IS_VALID (self->latency)) {
1100 if (GST_CLOCK_TIME_IS_VALID (data.min))
1101 data.min += self->latency;
1102 if (GST_CLOCK_TIME_IS_VALID (data.max))
1103 data.max += self->latency;
1106 if (GST_CLOCK_TIME_IS_VALID (self->priv->sub_latency_min)
1107 && GST_CLOCK_TIME_IS_VALID (data.min))
1108 data.min += self->priv->sub_latency_min;
1109 if (GST_CLOCK_TIME_IS_VALID (self->priv->sub_latency_max)
1110 && GST_CLOCK_TIME_IS_VALID (data.max))
1111 data.max += self->priv->sub_latency_max;
1113 GST_DEBUG_OBJECT (self, "configured latency live:%s min:%" G_GINT64_FORMAT
1114 " max:%" G_GINT64_FORMAT, data.live ? "true" : "false", data.min,
1117 gst_query_set_latency (query, data.live, data.min, data.max);
1123 _send_event (GstElement * element, GstEvent * event)
1125 GstAggregator *self = GST_AGGREGATOR (element);
1127 GST_STATE_LOCK (element);
1128 if (GST_EVENT_TYPE (event) == GST_EVENT_SEEK &&
1129 GST_STATE (element) < GST_STATE_PAUSED) {
1133 GstSeekType start_type, stop_type;
1136 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1137 &start, &stop_type, &stop);
1138 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
1139 stop_type, stop, NULL);
1141 self->priv->seqnum = gst_event_get_seqnum (event);
1142 GST_DEBUG_OBJECT (element, "Storing segment %" GST_PTR_FORMAT, event);
1144 GST_STATE_UNLOCK (element);
1147 return GST_ELEMENT_CLASS (aggregator_parent_class)->send_event (element,
1152 _src_query (GstAggregator * self, GstQuery * query)
1154 gboolean res = TRUE;
1156 switch (GST_QUERY_TYPE (query)) {
1157 case GST_QUERY_SEEKING:
1161 /* don't pass it along as some (file)sink might claim it does
1162 * whereas with a collectpads in between that will not likely work */
1163 gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
1164 gst_query_set_seeking (query, format, FALSE, 0, -1);
1169 case GST_QUERY_LATENCY:
1173 ret = gst_aggregator_query_latency (self, query);
1174 /* Wake up the src thread again, due to changed latencies
1175 * or changed live-ness we might have to adjust if we wait
1176 * on a deadline at all and how long.
1178 SRC_STREAM_BROADCAST (self);
1185 return gst_pad_query_default (self->srcpad, GST_OBJECT (self), query);
1192 event_forward_func (GstPad * pad, EventData * evdata)
1194 gboolean ret = TRUE;
1195 GstPad *peer = gst_pad_get_peer (pad);
1196 GstAggregatorPadPrivate *padpriv = GST_AGGREGATOR_PAD (pad)->priv;
1199 ret = gst_pad_send_event (peer, gst_event_ref (evdata->event));
1200 GST_DEBUG_OBJECT (pad, "return of event push is %d", ret);
1201 gst_object_unref (peer);
1205 if (GST_EVENT_TYPE (evdata->event) == GST_EVENT_SEEK)
1206 GST_ERROR_OBJECT (pad, "Event %" GST_PTR_FORMAT " failed", evdata->event);
1208 if (GST_EVENT_TYPE (evdata->event) == GST_EVENT_SEEK) {
1209 GstQuery *seeking = gst_query_new_seeking (GST_FORMAT_TIME);
1211 if (gst_pad_query (peer, seeking)) {
1214 gst_query_parse_seeking (seeking, NULL, &seekable, NULL, NULL);
1216 if (seekable == FALSE) {
1217 GST_INFO_OBJECT (pad,
1218 "Source not seekable, We failed but it does not matter!");
1223 GST_ERROR_OBJECT (pad, "Query seeking FAILED");
1227 if (evdata->flush) {
1228 padpriv->pending_flush_start = FALSE;
1229 padpriv->pending_flush_stop = FALSE;
1232 evdata->one_actually_seeked = TRUE;
1235 evdata->result &= ret;
1237 /* Always send to all pads */
1242 _set_flush_pending (GstAggregator * self, GstAggregatorPad * pad,
1245 pad->priv->pending_flush_start = TRUE;
1246 pad->priv->pending_flush_stop = FALSE;
1252 _forward_event_to_all_sinkpads (GstAggregator * self, GstEvent * event,
1257 evdata.event = event;
1258 evdata.result = TRUE;
1259 evdata.flush = flush;
1260 evdata.one_actually_seeked = FALSE;
1262 /* We first need to set all pads as flushing in a first pass
1263 * as flush_start flush_stop is sometimes sent synchronously
1264 * while we send the seek event */
1266 gst_aggregator_iterate_sinkpads (self,
1267 (GstAggregatorPadForeachFunc) _set_flush_pending, NULL);
1268 gst_pad_forward (self->srcpad, (GstPadForwardFunction) event_forward_func,
1271 gst_event_unref (event);
1277 _do_seek (GstAggregator * self, GstEvent * event)
1282 GstSeekType start_type, stop_type;
1286 GstAggregatorPrivate *priv = self->priv;
1288 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1289 &start, &stop_type, &stop);
1291 GST_INFO_OBJECT (self, "starting SEEK");
1293 flush = flags & GST_SEEK_FLAG_FLUSH;
1296 g_atomic_int_set (&priv->pending_flush_start, TRUE);
1297 g_atomic_int_set (&priv->flush_seeking, TRUE);
1300 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
1301 stop_type, stop, NULL);
1303 /* forward the seek upstream */
1304 evdata = _forward_event_to_all_sinkpads (self, event, flush);
1307 if (!evdata.result || !evdata.one_actually_seeked) {
1308 g_atomic_int_set (&priv->flush_seeking, FALSE);
1309 g_atomic_int_set (&priv->pending_flush_start, FALSE);
1312 GST_INFO_OBJECT (self, "seek done, result: %d", evdata.result);
1314 return evdata.result;
1318 _src_event (GstAggregator * self, GstEvent * event)
1321 gboolean res = TRUE;
1323 switch (GST_EVENT_TYPE (event)) {
1324 case GST_EVENT_SEEK:
1326 gst_event_ref (event);
1327 res = _do_seek (self, event);
1328 gst_event_unref (event);
1332 case GST_EVENT_NAVIGATION:
1334 /* navigation is rather pointless. */
1336 gst_event_unref (event);
1345 evdata = _forward_event_to_all_sinkpads (self, event, FALSE);
1346 res = evdata.result;
1353 src_event_func (GstPad * pad, GstObject * parent, GstEvent * event)
1355 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
1357 return klass->src_event (GST_AGGREGATOR (parent), event);
1361 src_query_func (GstPad * pad, GstObject * parent, GstQuery * query)
1363 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
1365 return klass->src_query (GST_AGGREGATOR (parent), query);
1369 src_activate_mode (GstPad * pad,
1370 GstObject * parent, GstPadMode mode, gboolean active)
1372 GstAggregator *self = GST_AGGREGATOR (parent);
1373 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
1375 if (klass->src_activate) {
1376 if (klass->src_activate (self, mode, active) == FALSE) {
1381 if (active == TRUE) {
1383 case GST_PAD_MODE_PUSH:
1385 GST_INFO_OBJECT (pad, "Activating pad!");
1386 _start_srcpad_task (self);
1391 GST_ERROR_OBJECT (pad, "Only supported mode is PUSH");
1398 GST_INFO_OBJECT (self, "Deactivating srcpad");
1399 _stop_srcpad_task (self, FALSE);
1405 _sink_query (GstAggregator * self, GstAggregatorPad * aggpad, GstQuery * query)
1407 GstPad *pad = GST_PAD (aggpad);
1409 return gst_pad_query_default (pad, GST_OBJECT (self), query);
1413 gst_aggregator_finalize (GObject * object)
1415 GstAggregator *self = (GstAggregator *) object;
1417 gst_object_unref (self->clock);
1418 g_mutex_clear (&self->priv->setcaps_lock);
1419 g_mutex_clear (&self->priv->src_lock);
1420 g_cond_clear (&self->priv->src_cond);
1422 G_OBJECT_CLASS (aggregator_parent_class)->finalize (object);
1426 gst_aggregator_dispose (GObject * object)
1428 G_OBJECT_CLASS (aggregator_parent_class)->dispose (object);
1432 * gst_aggregator_set_latency_property:
1433 * @agg: a #GstAggregator
1434 * @latency: the new latency value.
1436 * Sets the new latency value to @latency. This value is used to limit the
1437 * amount of time a pad waits for data to appear before considering the pad
1441 gst_aggregator_set_latency_property (GstAggregator * self, gint64 latency)
1445 g_return_if_fail (GST_IS_AGGREGATOR (self));
1447 GST_OBJECT_LOCK (self);
1449 if (self->priv->latency_live && self->priv->latency_max != 0 &&
1450 GST_CLOCK_TIME_IS_VALID (latency) && latency > self->priv->latency_max) {
1451 GST_ELEMENT_WARNING (self, CORE, NEGOTIATION,
1452 ("%s", "Latency too big"),
1453 ("The requested latency value is too big for the latency in the "
1454 "current pipeline. Limiting to %" G_GINT64_FORMAT,
1455 self->priv->latency_max));
1456 latency = self->priv->latency_max;
1459 changed = self->latency != latency;
1460 self->latency = latency;
1461 GST_OBJECT_UNLOCK (self);
1464 gst_element_post_message (GST_ELEMENT_CAST (self),
1465 gst_message_new_latency (GST_OBJECT_CAST (self)));
1469 * gst_aggregator_get_latency_property:
1470 * @agg: a #GstAggregator
1472 * Gets the latency value. See gst_aggregator_set_latency for
1475 * Returns: The time in nanoseconds to wait for data to arrive on a sink pad
1476 * before a pad is deemed unresponsive. A value of -1 means an
1480 gst_aggregator_get_latency_property (GstAggregator * agg)
1484 g_return_val_if_fail (GST_IS_AGGREGATOR (agg), -1);
1486 GST_OBJECT_LOCK (agg);
1488 GST_OBJECT_UNLOCK (agg);
1494 gst_aggregator_set_property (GObject * object, guint prop_id,
1495 const GValue * value, GParamSpec * pspec)
1497 GstAggregator *agg = GST_AGGREGATOR (object);
1501 gst_aggregator_set_latency_property (agg, g_value_get_int64 (value));
1504 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1510 gst_aggregator_get_property (GObject * object, guint prop_id,
1511 GValue * value, GParamSpec * pspec)
1513 GstAggregator *agg = GST_AGGREGATOR (object);
1517 g_value_set_int64 (value, gst_aggregator_get_latency_property (agg));
1520 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1525 /* GObject vmethods implementations */
1527 gst_aggregator_class_init (GstAggregatorClass * klass)
1529 GObjectClass *gobject_class = (GObjectClass *) klass;
1530 GstElementClass *gstelement_class = (GstElementClass *) klass;
1532 aggregator_parent_class = g_type_class_peek_parent (klass);
1533 g_type_class_add_private (klass, sizeof (GstAggregatorPrivate));
1535 GST_DEBUG_CATEGORY_INIT (aggregator_debug, "aggregator",
1536 GST_DEBUG_FG_MAGENTA, "GstAggregator");
1538 klass->sinkpads_type = GST_TYPE_AGGREGATOR_PAD;
1539 klass->start = _start;
1540 klass->stop = _stop;
1542 klass->sink_event = _sink_event;
1543 klass->sink_query = _sink_query;
1545 klass->src_event = _src_event;
1546 klass->src_query = _src_query;
1548 gstelement_class->request_new_pad = GST_DEBUG_FUNCPTR (_request_new_pad);
1549 gstelement_class->send_event = GST_DEBUG_FUNCPTR (_send_event);
1550 gstelement_class->release_pad = GST_DEBUG_FUNCPTR (_release_pad);
1551 gstelement_class->change_state = GST_DEBUG_FUNCPTR (_change_state);
1553 gobject_class->set_property = gst_aggregator_set_property;
1554 gobject_class->get_property = gst_aggregator_get_property;
1555 gobject_class->finalize = gst_aggregator_finalize;
1556 gobject_class->dispose = gst_aggregator_dispose;
1558 g_object_class_install_property (gobject_class, PROP_LATENCY,
1559 g_param_spec_int64 ("latency", "Buffer latency",
1560 "Additional latency in live mode to allow upstream "
1561 "to take longer to produce buffers for the current "
1563 (G_MAXLONG == G_MAXINT64) ? G_MAXINT64 : (G_MAXLONG * GST_SECOND - 1),
1564 DEFAULT_LATENCY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1568 gst_aggregator_init (GstAggregator * self, GstAggregatorClass * klass)
1570 GstPadTemplate *pad_template;
1571 GstAggregatorPrivate *priv;
1573 g_return_if_fail (klass->aggregate != NULL);
1576 G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_AGGREGATOR,
1577 GstAggregatorPrivate);
1582 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "src");
1583 g_return_if_fail (pad_template != NULL);
1585 priv->padcount = -1;
1586 priv->tags_changed = FALSE;
1588 self->priv->latency_live = FALSE;
1589 self->priv->latency_min = self->priv->sub_latency_min = 0;
1590 self->priv->latency_max = self->priv->sub_latency_max = GST_CLOCK_TIME_NONE;
1591 _reset_flow_values (self);
1593 self->srcpad = gst_pad_new_from_template (pad_template, "src");
1595 gst_pad_set_event_function (self->srcpad,
1596 GST_DEBUG_FUNCPTR ((GstPadEventFunction) src_event_func));
1597 gst_pad_set_query_function (self->srcpad,
1598 GST_DEBUG_FUNCPTR ((GstPadQueryFunction) src_query_func));
1599 gst_pad_set_activatemode_function (self->srcpad,
1600 GST_DEBUG_FUNCPTR ((GstPadActivateModeFunction) src_activate_mode));
1602 gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
1604 self->clock = gst_system_clock_obtain ();
1607 g_mutex_init (&self->priv->setcaps_lock);
1608 g_mutex_init (&self->priv->src_lock);
1609 g_cond_init (&self->priv->src_cond);
1612 /* we can't use G_DEFINE_ABSTRACT_TYPE because we need the klass in the _init
1613 * method to get to the padtemplates */
1615 gst_aggregator_get_type (void)
1617 static volatile gsize type = 0;
1619 if (g_once_init_enter (&type)) {
1621 static const GTypeInfo info = {
1622 sizeof (GstAggregatorClass),
1625 (GClassInitFunc) gst_aggregator_class_init,
1628 sizeof (GstAggregator),
1630 (GInstanceInitFunc) gst_aggregator_init,
1633 _type = g_type_register_static (GST_TYPE_ELEMENT,
1634 "GstAggregator", &info, G_TYPE_FLAG_ABSTRACT);
1635 g_once_init_leave (&type, _type);
1640 static GstFlowReturn
1641 _chain (GstPad * pad, GstObject * object, GstBuffer * buffer)
1643 GstBuffer *actual_buf = buffer;
1644 GstAggregator *self = GST_AGGREGATOR (object);
1645 GstAggregatorPrivate *priv = self->priv;
1646 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1647 GstAggregatorClass *aggclass = GST_AGGREGATOR_GET_CLASS (object);
1649 GST_DEBUG_OBJECT (aggpad, "Start chaining a buffer %" GST_PTR_FORMAT, buffer);
1651 PAD_STREAM_LOCK (aggpad);
1653 if (g_atomic_int_get (&aggpad->priv->flushing) == TRUE)
1656 if (g_atomic_int_get (&aggpad->priv->pending_eos) == TRUE)
1659 PAD_LOCK_EVENT (aggpad);
1661 while (aggpad->buffer && g_atomic_int_get (&aggpad->priv->flushing) == FALSE) {
1662 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
1663 PAD_WAIT_EVENT (aggpad);
1665 PAD_UNLOCK_EVENT (aggpad);
1667 if (g_atomic_int_get (&aggpad->priv->flushing) == TRUE)
1670 if (aggclass->clip) {
1671 aggclass->clip (self, aggpad, buffer, &actual_buf);
1674 PAD_LOCK_EVENT (aggpad);
1676 gst_buffer_unref (aggpad->buffer);
1677 aggpad->buffer = actual_buf;
1678 PAD_UNLOCK_EVENT (aggpad);
1679 PAD_STREAM_UNLOCK (aggpad);
1681 if (gst_aggregator_iterate_sinkpads (self,
1682 (GstAggregatorPadForeachFunc) _check_all_pads_with_data_or_eos, NULL))
1683 SRC_STREAM_BROADCAST (self);
1685 GST_DEBUG_OBJECT (aggpad, "Done chaining");
1687 return priv->flow_return;
1690 PAD_STREAM_UNLOCK (aggpad);
1692 gst_buffer_unref (buffer);
1693 GST_DEBUG_OBJECT (aggpad, "We are flushing");
1695 return GST_FLOW_FLUSHING;
1698 PAD_STREAM_UNLOCK (aggpad);
1700 gst_buffer_unref (buffer);
1701 GST_DEBUG_OBJECT (pad, "We are EOS already...");
1703 return GST_FLOW_EOS;
1707 pad_query_func (GstPad * pad, GstObject * parent, GstQuery * query)
1709 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1710 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
1712 if (GST_QUERY_IS_SERIALIZED (query)) {
1713 PAD_LOCK_EVENT (aggpad);
1715 if (g_atomic_int_get (&aggpad->priv->flushing) == TRUE) {
1716 PAD_UNLOCK_EVENT (aggpad);
1720 while (aggpad->buffer
1721 && g_atomic_int_get (&aggpad->priv->flushing) == FALSE) {
1722 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
1723 PAD_WAIT_EVENT (aggpad);
1725 PAD_UNLOCK_EVENT (aggpad);
1727 if (g_atomic_int_get (&aggpad->priv->flushing) == TRUE)
1731 return klass->sink_query (GST_AGGREGATOR (parent),
1732 GST_AGGREGATOR_PAD (pad), query);
1735 GST_DEBUG_OBJECT (aggpad, "Pad is flushing, dropping query");
1740 pad_event_func (GstPad * pad, GstObject * parent, GstEvent * event)
1742 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1743 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
1745 if (GST_EVENT_IS_SERIALIZED (event) && GST_EVENT_TYPE (event) != GST_EVENT_EOS
1746 && GST_EVENT_TYPE (event) != GST_EVENT_SEGMENT_DONE) {
1747 PAD_LOCK_EVENT (aggpad);
1749 if (g_atomic_int_get (&aggpad->priv->flushing) == TRUE
1750 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
1751 PAD_UNLOCK_EVENT (aggpad);
1755 while (aggpad->buffer
1756 && g_atomic_int_get (&aggpad->priv->flushing) == FALSE) {
1757 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
1758 PAD_WAIT_EVENT (aggpad);
1760 PAD_UNLOCK_EVENT (aggpad);
1762 if (g_atomic_int_get (&aggpad->priv->flushing) == TRUE
1763 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP)
1767 return klass->sink_event (GST_AGGREGATOR (parent),
1768 GST_AGGREGATOR_PAD (pad), event);
1771 GST_DEBUG_OBJECT (aggpad, "Pad is flushing, dropping event");
1772 if (GST_EVENT_IS_STICKY (event))
1773 gst_pad_store_sticky_event (pad, event);
1774 gst_event_unref (event);
1779 pad_activate_mode_func (GstPad * pad,
1780 GstObject * parent, GstPadMode mode, gboolean active)
1782 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1784 if (active == FALSE) {
1785 PAD_LOCK_EVENT (aggpad);
1786 g_atomic_int_set (&aggpad->priv->flushing, TRUE);
1787 gst_buffer_replace (&aggpad->buffer, NULL);
1788 PAD_BROADCAST_EVENT (aggpad);
1789 PAD_UNLOCK_EVENT (aggpad);
1791 g_atomic_int_set (&aggpad->priv->flushing, FALSE);
1792 PAD_LOCK_EVENT (aggpad);
1793 PAD_BROADCAST_EVENT (aggpad);
1794 PAD_UNLOCK_EVENT (aggpad);
1800 /***********************************
1801 * GstAggregatorPad implementation *
1802 ************************************/
1803 static GstPadClass *aggregator_pad_parent_class = NULL;
1804 G_DEFINE_TYPE (GstAggregatorPad, gst_aggregator_pad, GST_TYPE_PAD);
1807 _pad_constructed (GObject * object)
1809 GstPad *pad = GST_PAD (object);
1811 gst_pad_set_chain_function (pad,
1812 GST_DEBUG_FUNCPTR ((GstPadChainFunction) _chain));
1813 gst_pad_set_event_function (pad,
1814 GST_DEBUG_FUNCPTR ((GstPadEventFunction) pad_event_func));
1815 gst_pad_set_query_function (pad,
1816 GST_DEBUG_FUNCPTR ((GstPadQueryFunction) pad_query_func));
1817 gst_pad_set_activatemode_function (pad,
1818 GST_DEBUG_FUNCPTR ((GstPadActivateModeFunction) pad_activate_mode_func));
1822 gst_aggregator_pad_finalize (GObject * object)
1824 GstAggregatorPad *pad = (GstAggregatorPad *) object;
1826 g_mutex_clear (&pad->priv->event_lock);
1827 g_cond_clear (&pad->priv->event_cond);
1828 g_mutex_clear (&pad->priv->stream_lock);
1830 G_OBJECT_CLASS (aggregator_pad_parent_class)->finalize (object);
1834 gst_aggregator_pad_dispose (GObject * object)
1836 GstAggregatorPad *pad = (GstAggregatorPad *) object;
1839 buf = gst_aggregator_pad_steal_buffer (pad);
1841 gst_buffer_unref (buf);
1843 G_OBJECT_CLASS (aggregator_pad_parent_class)->dispose (object);
1847 gst_aggregator_pad_class_init (GstAggregatorPadClass * klass)
1849 GObjectClass *gobject_class = (GObjectClass *) klass;
1851 aggregator_pad_parent_class = g_type_class_peek_parent (klass);
1852 g_type_class_add_private (klass, sizeof (GstAggregatorPadPrivate));
1854 gobject_class->constructed = GST_DEBUG_FUNCPTR (_pad_constructed);
1855 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_aggregator_pad_finalize);
1856 gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_aggregator_pad_dispose);
1860 gst_aggregator_pad_init (GstAggregatorPad * pad)
1863 G_TYPE_INSTANCE_GET_PRIVATE (pad, GST_TYPE_AGGREGATOR_PAD,
1864 GstAggregatorPadPrivate);
1867 g_mutex_init (&pad->priv->event_lock);
1868 g_cond_init (&pad->priv->event_cond);
1870 g_mutex_init (&pad->priv->stream_lock);
1874 * gst_aggregator_pad_steal_buffer:
1875 * @pad: the pad to get buffer from
1877 * Steal the ref to the buffer currently queued in @pad.
1879 * Returns: (transfer full): The buffer in @pad or NULL if no buffer was
1880 * queued. You should unref the buffer after usage.
1883 gst_aggregator_pad_steal_buffer (GstAggregatorPad * pad)
1885 GstBuffer *buffer = NULL;
1887 PAD_LOCK_EVENT (pad);
1889 GST_TRACE_OBJECT (pad, "Consuming buffer");
1890 buffer = pad->buffer;
1892 if (pad->priv->pending_eos) {
1893 pad->priv->pending_eos = FALSE;
1896 PAD_BROADCAST_EVENT (pad);
1897 GST_DEBUG_OBJECT (pad, "Consumed: %" GST_PTR_FORMAT, buffer);
1899 PAD_UNLOCK_EVENT (pad);
1905 * gst_aggregator_pad_get_buffer:
1906 * @pad: the pad to get buffer from
1908 * Returns: (transfer full): A reference to the buffer in @pad or
1909 * NULL if no buffer was queued. You should unref the buffer after
1913 gst_aggregator_pad_get_buffer (GstAggregatorPad * pad)
1915 GstBuffer *buffer = NULL;
1917 PAD_LOCK_EVENT (pad);
1919 buffer = gst_buffer_ref (pad->buffer);
1920 PAD_UNLOCK_EVENT (pad);
1926 * gst_aggregator_merge_tags:
1927 * @self: a #GstAggregator
1928 * @tags: a #GstTagList to merge
1929 * @mode: the #GstTagMergeMode to use
1931 * Adds tags to so-called pending tags, which will be processed
1932 * before pushing out data downstream.
1934 * Note that this is provided for convenience, and the subclass is
1935 * not required to use this and can still do tag handling on its own.
1940 gst_aggregator_merge_tags (GstAggregator * self,
1941 const GstTagList * tags, GstTagMergeMode mode)
1945 g_return_if_fail (GST_IS_AGGREGATOR (self));
1946 g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
1948 /* FIXME Check if we can use OBJECT lock here! */
1949 GST_OBJECT_LOCK (self);
1951 GST_DEBUG_OBJECT (self, "merging tags %" GST_PTR_FORMAT, tags);
1952 otags = self->priv->tags;
1953 self->priv->tags = gst_tag_list_merge (self->priv->tags, tags, mode);
1955 gst_tag_list_unref (otags);
1956 self->priv->tags_changed = TRUE;
1957 GST_OBJECT_UNLOCK (self);
1961 * gst_aggregator_set_latency:
1962 * @self: a #GstAggregator
1963 * @min_latency: minimum latency
1964 * @max_latency: maximum latency
1966 * Lets #GstAggregator sub-classes tell the baseclass what their internal
1967 * latency is. Will also post a LATENCY message on the bus so the pipeline
1968 * can reconfigure its global latency.
1971 gst_aggregator_set_latency (GstAggregator * self,
1972 GstClockTime min_latency, GstClockTime max_latency)
1974 g_return_if_fail (GST_IS_AGGREGATOR (self));
1975 g_return_if_fail (max_latency >= min_latency);
1977 GST_OBJECT_LOCK (self);
1978 self->priv->sub_latency_min = min_latency;
1979 self->priv->sub_latency_max = max_latency;
1980 GST_OBJECT_UNLOCK (self);
1982 gst_element_post_message (GST_ELEMENT_CAST (self),
1983 gst_message_new_latency (GST_OBJECT_CAST (self)));