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 */
230 /* This lock prevents a flush start processing happening while
231 * the chain function is also happening.
236 /* Must be called with PAD_LOCK held */
238 gst_aggregator_pad_reset_unlocked (GstAggregatorPad * aggpad)
240 aggpad->priv->pending_eos = FALSE;
241 aggpad->priv->eos = FALSE;
242 aggpad->priv->flow_return = GST_FLOW_OK;
243 GST_OBJECT_LOCK (aggpad);
244 gst_segment_init (&aggpad->segment, GST_FORMAT_UNDEFINED);
245 gst_segment_init (&aggpad->priv->head_segment, GST_FORMAT_UNDEFINED);
246 GST_OBJECT_UNLOCK (aggpad);
247 aggpad->priv->head_position = GST_CLOCK_TIME_NONE;
248 aggpad->priv->tail_position = GST_CLOCK_TIME_NONE;
249 aggpad->priv->head_time = GST_CLOCK_TIME_NONE;
250 aggpad->priv->tail_time = GST_CLOCK_TIME_NONE;
251 aggpad->priv->time_level = 0;
252 aggpad->priv->first_buffer = TRUE;
256 gst_aggregator_pad_flush (GstAggregatorPad * aggpad, GstAggregator * agg)
258 GstAggregatorPadClass *klass = GST_AGGREGATOR_PAD_GET_CLASS (aggpad);
261 gst_aggregator_pad_reset_unlocked (aggpad);
265 return klass->flush (aggpad, agg);
270 /*************************************
271 * GstAggregator implementation *
272 *************************************/
273 static GstElementClass *aggregator_parent_class = NULL;
275 /* All members are protected by the object lock unless otherwise noted */
277 struct _GstAggregatorPrivate
281 /* Our state is >= PAUSED */
282 gboolean running; /* protected by src_lock */
285 gboolean send_stream_start; /* protected by srcpad stream lock */
286 gboolean send_segment;
287 gboolean flush_seeking;
288 gboolean pending_flush_start;
289 gboolean send_eos; /* protected by srcpad stream lock */
291 GstCaps *srccaps; /* protected by the srcpad stream lock */
294 gboolean tags_changed;
296 gboolean peer_latency_live; /* protected by src_lock */
297 GstClockTime peer_latency_min; /* protected by src_lock */
298 GstClockTime peer_latency_max; /* protected by src_lock */
299 gboolean has_peer_latency; /* protected by src_lock */
301 GstClockTime sub_latency_min; /* protected by src_lock */
302 GstClockTime sub_latency_max; /* protected by src_lock */
305 GstClockID aggregate_id; /* protected by src_lock */
309 gboolean first_buffer; /* protected by object lock */
310 GstAggregatorStartTimeSelection start_time_selection;
311 GstClockTime start_time;
313 /* protected by the object lock */
314 GstQuery *allocation_query;
315 GstAllocator *allocator;
317 GstAllocationParams allocation_params;
320 gint64 latency; /* protected by both src_lock and all pad locks */
328 gboolean only_to_active_pads;
330 gboolean one_actually_seeked;
333 #define DEFAULT_LATENCY 0
334 #define DEFAULT_START_TIME_SELECTION GST_AGGREGATOR_START_TIME_SELECTION_ZERO
335 #define DEFAULT_START_TIME (-1)
341 PROP_START_TIME_SELECTION,
346 static GstFlowReturn gst_aggregator_pad_chain_internal (GstAggregator * self,
347 GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head);
350 * gst_aggregator_iterate_sinkpads:
351 * @self: The #GstAggregator
352 * @func: (scope call): The function to call.
353 * @user_data: (closure): The data to pass to @func.
355 * Iterate the sinkpads of aggregator to call a function on them.
357 * This method guarantees that @func will be called only once for each
361 gst_aggregator_iterate_sinkpads (GstAggregator * self,
362 GstAggregatorPadForeachFunc func, gpointer user_data)
364 gboolean result = FALSE;
366 gboolean done = FALSE;
367 GValue item = { 0, };
368 GList *seen_pads = NULL;
370 iter = gst_element_iterate_sink_pads (GST_ELEMENT (self));
376 switch (gst_iterator_next (iter, &item)) {
377 case GST_ITERATOR_OK:
379 GstAggregatorPad *pad;
381 pad = g_value_get_object (&item);
383 /* if already pushed, skip. FIXME, find something faster to tag pads */
384 if (pad == NULL || g_list_find (seen_pads, pad)) {
385 g_value_reset (&item);
389 GST_LOG_OBJECT (pad, "calling function %s on pad",
390 GST_DEBUG_FUNCPTR_NAME (func));
392 result = func (self, pad, user_data);
396 seen_pads = g_list_prepend (seen_pads, pad);
398 g_value_reset (&item);
401 case GST_ITERATOR_RESYNC:
402 gst_iterator_resync (iter);
404 case GST_ITERATOR_ERROR:
405 GST_ERROR_OBJECT (self,
406 "Could not iterate over internally linked pads");
409 case GST_ITERATOR_DONE:
414 g_value_unset (&item);
415 gst_iterator_free (iter);
417 if (seen_pads == NULL) {
418 GST_DEBUG_OBJECT (self, "No pad seen");
422 g_list_free (seen_pads);
429 gst_aggregator_pad_queue_is_empty (GstAggregatorPad * pad)
431 return (g_queue_peek_tail (&pad->priv->buffers) == NULL &&
432 pad->priv->clipped_buffer == NULL);
436 gst_aggregator_check_pads_ready (GstAggregator * self)
438 GstAggregatorPad *pad;
440 gboolean have_buffer = TRUE;
441 gboolean have_event = FALSE;
443 GST_LOG_OBJECT (self, "checking pads");
445 GST_OBJECT_LOCK (self);
447 sinkpads = GST_ELEMENT_CAST (self)->sinkpads;
448 if (sinkpads == NULL)
451 for (l = sinkpads; l != NULL; l = l->next) {
456 if (pad->priv->num_buffers == 0) {
457 if (!gst_aggregator_pad_queue_is_empty (pad))
459 if (!pad->priv->eos) {
462 /* If not live we need data on all pads, so leave the loop */
463 if (!self->priv->peer_latency_live) {
468 } else if (self->priv->peer_latency_live) {
469 /* In live mode, having a single pad with buffers is enough to
470 * generate a start time from it. In non-live mode all pads need
473 self->priv->first_buffer = FALSE;
479 if (!have_buffer && !have_event)
483 self->priv->first_buffer = FALSE;
485 GST_OBJECT_UNLOCK (self);
486 GST_LOG_OBJECT (self, "pads are ready");
491 GST_LOG_OBJECT (self, "pads not ready: no sink pads");
492 GST_OBJECT_UNLOCK (self);
498 GST_LOG_OBJECT (pad, "pad not ready to be aggregated yet,"
499 " but waking up for serialized event");
501 GST_LOG_OBJECT (pad, "pad not ready to be aggregated yet");
502 GST_OBJECT_UNLOCK (self);
508 gst_aggregator_reset_flow_values (GstAggregator * self)
510 GST_OBJECT_LOCK (self);
511 self->priv->send_stream_start = TRUE;
512 self->priv->send_segment = TRUE;
513 gst_segment_init (&self->segment, GST_FORMAT_TIME);
514 self->priv->first_buffer = TRUE;
515 GST_OBJECT_UNLOCK (self);
519 gst_aggregator_push_mandatory_events (GstAggregator * self)
521 GstAggregatorPrivate *priv = self->priv;
522 GstEvent *segment = NULL;
523 GstEvent *tags = NULL;
525 if (self->priv->send_stream_start) {
528 GST_INFO_OBJECT (self, "pushing stream start");
529 /* stream-start (FIXME: create id based on input ids) */
530 g_snprintf (s_id, sizeof (s_id), "agg-%08x", g_random_int ());
531 if (!gst_pad_push_event (self->srcpad, gst_event_new_stream_start (s_id))) {
532 GST_WARNING_OBJECT (self->srcpad, "Sending stream start event failed");
534 self->priv->send_stream_start = FALSE;
537 if (self->priv->srccaps) {
539 GST_INFO_OBJECT (self, "pushing caps: %" GST_PTR_FORMAT,
540 self->priv->srccaps);
541 if (!gst_pad_push_event (self->srcpad,
542 gst_event_new_caps (self->priv->srccaps))) {
543 GST_WARNING_OBJECT (self->srcpad, "Sending caps event failed");
545 gst_caps_unref (self->priv->srccaps);
546 self->priv->srccaps = NULL;
549 GST_OBJECT_LOCK (self);
550 if (self->priv->send_segment && !self->priv->flush_seeking) {
551 segment = gst_event_new_segment (&self->segment);
553 if (!self->priv->seqnum)
554 self->priv->seqnum = gst_event_get_seqnum (segment);
556 gst_event_set_seqnum (segment, self->priv->seqnum);
557 self->priv->send_segment = FALSE;
559 GST_DEBUG_OBJECT (self, "pushing segment %" GST_PTR_FORMAT, segment);
562 if (priv->tags && priv->tags_changed && !self->priv->flush_seeking) {
563 tags = gst_event_new_tag (gst_tag_list_ref (priv->tags));
564 priv->tags_changed = FALSE;
566 GST_OBJECT_UNLOCK (self);
569 gst_pad_push_event (self->srcpad, segment);
571 gst_pad_push_event (self->srcpad, tags);
576 * gst_aggregator_set_src_caps:
577 * @self: The #GstAggregator
578 * @caps: The #GstCaps to set on the src pad.
580 * Sets the caps to be used on the src pad.
583 gst_aggregator_set_src_caps (GstAggregator * self, GstCaps * caps)
585 GST_PAD_STREAM_LOCK (self->srcpad);
586 gst_caps_replace (&self->priv->srccaps, caps);
587 gst_aggregator_push_mandatory_events (self);
588 GST_PAD_STREAM_UNLOCK (self->srcpad);
592 * gst_aggregator_finish_buffer:
593 * @self: The #GstAggregator
594 * @buffer: (transfer full): the #GstBuffer to push.
596 * This method will push the provided output buffer downstream. If needed,
597 * mandatory events such as stream-start, caps, and segment events will be
598 * sent before pushing the buffer.
601 gst_aggregator_finish_buffer (GstAggregator * self, GstBuffer * buffer)
603 gst_aggregator_push_mandatory_events (self);
605 GST_OBJECT_LOCK (self);
606 if (!self->priv->flush_seeking && gst_pad_is_active (self->srcpad)) {
607 GST_TRACE_OBJECT (self, "pushing buffer %" GST_PTR_FORMAT, buffer);
608 GST_OBJECT_UNLOCK (self);
609 return gst_pad_push (self->srcpad, buffer);
611 GST_INFO_OBJECT (self, "Not pushing (active: %i, flushing: %i)",
612 self->priv->flush_seeking, gst_pad_is_active (self->srcpad));
613 GST_OBJECT_UNLOCK (self);
614 gst_buffer_unref (buffer);
620 gst_aggregator_push_eos (GstAggregator * self)
623 gst_aggregator_push_mandatory_events (self);
625 event = gst_event_new_eos ();
627 GST_OBJECT_LOCK (self);
628 self->priv->send_eos = FALSE;
629 gst_event_set_seqnum (event, self->priv->seqnum);
630 GST_OBJECT_UNLOCK (self);
632 gst_pad_push_event (self->srcpad, event);
636 gst_aggregator_get_next_time (GstAggregator * self)
638 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
640 if (klass->get_next_time)
641 return klass->get_next_time (self);
643 return GST_CLOCK_TIME_NONE;
647 gst_aggregator_wait_and_check (GstAggregator * self, gboolean * timeout)
649 GstClockTime latency;
657 latency = gst_aggregator_get_latency_unlocked (self);
659 if (gst_aggregator_check_pads_ready (self)) {
660 GST_DEBUG_OBJECT (self, "all pads have data");
666 /* Before waiting, check if we're actually still running */
667 if (!self->priv->running || !self->priv->send_eos) {
673 start = gst_aggregator_get_next_time (self);
675 /* If we're not live, or if we use the running time
676 * of the first buffer as start time, we wait until
677 * all pads have buffers.
678 * Otherwise (i.e. if we are live!), we wait on the clock
679 * and if a pad does not have a buffer in time we ignore
682 GST_OBJECT_LOCK (self);
683 if (!GST_CLOCK_TIME_IS_VALID (latency) ||
684 !GST_IS_CLOCK (GST_ELEMENT_CLOCK (self)) ||
685 !GST_CLOCK_TIME_IS_VALID (start) ||
686 (self->priv->first_buffer
687 && self->priv->start_time_selection ==
688 GST_AGGREGATOR_START_TIME_SELECTION_FIRST)) {
689 /* We wake up here when something happened, and below
690 * then check if we're ready now. If we return FALSE,
691 * we will be directly called again.
693 GST_OBJECT_UNLOCK (self);
696 GstClockTime base_time, time;
698 GstClockReturn status;
699 GstClockTimeDiff jitter;
701 GST_DEBUG_OBJECT (self, "got subclass start time: %" GST_TIME_FORMAT,
702 GST_TIME_ARGS (start));
704 base_time = GST_ELEMENT_CAST (self)->base_time;
705 clock = gst_object_ref (GST_ELEMENT_CLOCK (self));
706 GST_OBJECT_UNLOCK (self);
708 time = base_time + start;
711 GST_DEBUG_OBJECT (self, "possibly waiting for clock to reach %"
712 GST_TIME_FORMAT " (base %" GST_TIME_FORMAT " start %" GST_TIME_FORMAT
713 " latency %" GST_TIME_FORMAT " current %" GST_TIME_FORMAT ")",
714 GST_TIME_ARGS (time),
715 GST_TIME_ARGS (base_time),
716 GST_TIME_ARGS (start), GST_TIME_ARGS (latency),
717 GST_TIME_ARGS (gst_clock_get_time (clock)));
719 self->priv->aggregate_id = gst_clock_new_single_shot_id (clock, time);
720 gst_object_unref (clock);
724 status = gst_clock_id_wait (self->priv->aggregate_id, &jitter);
727 if (self->priv->aggregate_id) {
728 gst_clock_id_unref (self->priv->aggregate_id);
729 self->priv->aggregate_id = NULL;
732 GST_DEBUG_OBJECT (self,
733 "clock returned %d (jitter: %" GST_STIME_FORMAT ")",
734 status, GST_STIME_ARGS (jitter));
737 if (status == GST_CLOCK_OK || status == GST_CLOCK_EARLY) {
744 res = gst_aggregator_check_pads_ready (self);
751 check_events (GstAggregator * self, GstAggregatorPad * pad, gpointer user_data)
753 GstEvent *event = NULL;
754 GstQuery *query = NULL;
755 GstAggregatorClass *klass = NULL;
756 gboolean *processed_event = user_data;
762 if (pad->priv->num_buffers == 0 && pad->priv->pending_eos) {
763 pad->priv->pending_eos = FALSE;
764 pad->priv->eos = TRUE;
766 if (pad->priv->clipped_buffer == NULL &&
767 !GST_IS_BUFFER (g_queue_peek_tail (&pad->priv->buffers))) {
768 if (GST_IS_EVENT (g_queue_peek_tail (&pad->priv->buffers)))
769 event = gst_event_ref (g_queue_peek_tail (&pad->priv->buffers));
770 if (GST_IS_QUERY (g_queue_peek_tail (&pad->priv->buffers)))
771 query = g_queue_peek_tail (&pad->priv->buffers);
774 if (event || query) {
778 *processed_event = TRUE;
780 klass = GST_AGGREGATOR_GET_CLASS (self);
782 GST_LOG_OBJECT (pad, "Processing %" GST_PTR_FORMAT, event);
785 gst_event_ref (event);
786 ret = klass->sink_event (self, pad, event);
789 if (GST_EVENT_TYPE (event) == GST_EVENT_CAPS)
790 pad->priv->negotiated = ret;
791 if (g_queue_peek_tail (&pad->priv->buffers) == event)
792 gst_event_unref (g_queue_pop_tail (&pad->priv->buffers));
793 gst_event_unref (event);
797 GST_LOG_OBJECT (pad, "Processing %" GST_PTR_FORMAT, event);
798 ret = klass->sink_query (self, pad, query);
801 if (g_queue_peek_tail (&pad->priv->buffers) == query) {
804 s = gst_query_writable_structure (query);
805 gst_structure_set (s, "gst-aggregator-retval", G_TYPE_BOOLEAN, ret,
807 g_queue_pop_tail (&pad->priv->buffers);
811 PAD_BROADCAST_EVENT (pad);
816 *processed_event = TRUE;
818 klass = GST_AGGREGATOR_GET_CLASS (self);
820 } while (event != NULL);
826 gst_aggregator_pad_set_flushing (GstAggregatorPad * aggpad,
827 GstFlowReturn flow_return, gboolean full)
832 if (flow_return == GST_FLOW_NOT_LINKED)
833 aggpad->priv->flow_return = MIN (flow_return, aggpad->priv->flow_return);
835 aggpad->priv->flow_return = flow_return;
837 item = g_queue_peek_head_link (&aggpad->priv->buffers);
839 GList *next = item->next;
841 /* In partial flush, we do like the pad, we get rid of non-sticky events
844 if (full || GST_IS_BUFFER (item->data) ||
845 GST_EVENT_TYPE (item->data) == GST_EVENT_EOS ||
846 GST_EVENT_TYPE (item->data) == GST_EVENT_SEGMENT ||
847 !GST_EVENT_IS_STICKY (item->data)) {
848 if (!GST_IS_QUERY (item->data))
849 gst_mini_object_unref (item->data);
850 g_queue_delete_link (&aggpad->priv->buffers, item);
854 aggpad->priv->num_buffers = 0;
855 gst_buffer_replace (&aggpad->priv->clipped_buffer, NULL);
857 PAD_BROADCAST_EVENT (aggpad);
862 gst_aggregator_default_update_src_caps (GstAggregator * agg, GstCaps * caps,
865 *ret = gst_caps_ref (caps);
871 gst_aggregator_default_fixate_src_caps (GstAggregator * agg, GstCaps * caps)
873 caps = gst_caps_fixate (caps);
879 gst_aggregator_default_negotiated_src_caps (GstAggregator * agg, GstCaps * caps)
885 /* takes ownership of the pool, allocator and query */
887 gst_aggregator_set_allocation (GstAggregator * self,
888 GstBufferPool * pool, GstAllocator * allocator,
889 GstAllocationParams * params, GstQuery * query)
891 GstAllocator *oldalloc;
892 GstBufferPool *oldpool;
895 GST_DEBUG ("storing allocation query");
897 GST_OBJECT_LOCK (self);
898 oldpool = self->priv->pool;
899 self->priv->pool = pool;
901 oldalloc = self->priv->allocator;
902 self->priv->allocator = allocator;
904 oldquery = self->priv->allocation_query;
905 self->priv->allocation_query = query;
908 self->priv->allocation_params = *params;
910 gst_allocation_params_init (&self->priv->allocation_params);
911 GST_OBJECT_UNLOCK (self);
914 GST_DEBUG_OBJECT (self, "deactivating old pool %p", oldpool);
915 gst_buffer_pool_set_active (oldpool, FALSE);
916 gst_object_unref (oldpool);
919 gst_object_unref (oldalloc);
922 gst_query_unref (oldquery);
929 gst_aggregator_decide_allocation (GstAggregator * self, GstQuery * query)
931 GstAggregatorClass *aggclass = GST_AGGREGATOR_GET_CLASS (self);
933 if (aggclass->decide_allocation)
934 if (!aggclass->decide_allocation (self, query))
941 gst_aggregator_do_allocation (GstAggregator * self, GstCaps * caps)
944 gboolean result = TRUE;
945 GstBufferPool *pool = NULL;
946 GstAllocator *allocator;
947 GstAllocationParams params;
949 /* find a pool for the negotiated caps now */
950 GST_DEBUG_OBJECT (self, "doing allocation query");
951 query = gst_query_new_allocation (caps, TRUE);
952 if (!gst_pad_peer_query (self->srcpad, query)) {
953 /* not a problem, just debug a little */
954 GST_DEBUG_OBJECT (self, "peer ALLOCATION query failed");
957 GST_DEBUG_OBJECT (self, "calling decide_allocation");
958 result = gst_aggregator_decide_allocation (self, query);
960 GST_DEBUG_OBJECT (self, "ALLOCATION (%d) params: %" GST_PTR_FORMAT, result,
964 goto no_decide_allocation;
966 /* we got configuration from our peer or the decide_allocation method,
968 if (gst_query_get_n_allocation_params (query) > 0) {
969 gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
972 gst_allocation_params_init (¶ms);
975 if (gst_query_get_n_allocation_pools (query) > 0)
976 gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
980 gst_aggregator_set_allocation (self, pool, allocator, ¶ms, query);
985 no_decide_allocation:
987 GST_WARNING_OBJECT (self, "Failed to decide allocation");
988 gst_query_unref (query);
995 /* WITH SRC_LOCK held */
997 gst_aggregator_update_src_caps (GstAggregator * self)
999 GstAggregatorClass *agg_klass = GST_AGGREGATOR_GET_CLASS (self);
1000 GstCaps *downstream_caps, *template_caps, *caps = NULL;
1001 GstFlowReturn ret = GST_FLOW_OK;
1003 template_caps = gst_pad_get_pad_template_caps (self->srcpad);
1004 downstream_caps = gst_pad_peer_query_caps (self->srcpad, template_caps);
1006 if (gst_caps_is_empty (downstream_caps)) {
1007 GST_INFO_OBJECT (self, "Downstream caps (%"
1008 GST_PTR_FORMAT ") not compatible with pad template caps (%"
1009 GST_PTR_FORMAT ")", downstream_caps, template_caps);
1010 ret = GST_FLOW_NOT_NEGOTIATED;
1014 g_assert (agg_klass->update_src_caps);
1015 GST_DEBUG_OBJECT (self, "updating caps from %" GST_PTR_FORMAT,
1017 ret = agg_klass->update_src_caps (self, downstream_caps, &caps);
1018 if (ret < GST_FLOW_OK) {
1019 GST_WARNING_OBJECT (self, "Subclass failed to update provided caps");
1022 if ((caps == NULL || gst_caps_is_empty (caps)) && ret >= GST_FLOW_OK) {
1023 ret = GST_FLOW_NOT_NEGOTIATED;
1026 GST_DEBUG_OBJECT (self, " to %" GST_PTR_FORMAT, caps);
1028 #ifdef GST_ENABLE_EXTRA_CHECKS
1029 if (!gst_caps_is_subset (caps, template_caps)) {
1030 GstCaps *intersection;
1032 GST_ERROR_OBJECT (self,
1033 "update_src_caps returned caps %" GST_PTR_FORMAT
1034 " which are not a real subset of the template caps %"
1035 GST_PTR_FORMAT, caps, template_caps);
1036 g_warning ("%s: update_src_caps returned caps which are not a real "
1037 "subset of the filter caps", GST_ELEMENT_NAME (self));
1040 gst_caps_intersect_full (template_caps, caps, GST_CAPS_INTERSECT_FIRST);
1041 gst_caps_unref (caps);
1042 caps = intersection;
1046 if (gst_caps_is_any (caps)) {
1050 if (!gst_caps_is_fixed (caps)) {
1051 g_assert (agg_klass->fixate_src_caps);
1053 GST_DEBUG_OBJECT (self, "fixate caps from %" GST_PTR_FORMAT, caps);
1054 if (!(caps = agg_klass->fixate_src_caps (self, caps))) {
1055 GST_WARNING_OBJECT (self, "Subclass failed to fixate provided caps");
1056 ret = GST_FLOW_NOT_NEGOTIATED;
1059 GST_DEBUG_OBJECT (self, " to %" GST_PTR_FORMAT, caps);
1062 if (agg_klass->negotiated_src_caps) {
1063 if (!agg_klass->negotiated_src_caps (self, caps)) {
1064 GST_WARNING_OBJECT (self, "Subclass failed to accept negotiated caps");
1065 ret = GST_FLOW_NOT_NEGOTIATED;
1070 gst_aggregator_set_src_caps (self, caps);
1072 if (!gst_aggregator_do_allocation (self, caps)) {
1073 GST_WARNING_OBJECT (self, "Allocation negotiation failed");
1074 ret = GST_FLOW_NOT_NEGOTIATED;
1078 gst_caps_unref (downstream_caps);
1079 gst_caps_unref (template_caps);
1082 gst_caps_unref (caps);
1088 gst_aggregator_aggregate_func (GstAggregator * self)
1090 GstAggregatorPrivate *priv = self->priv;
1091 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
1092 gboolean timeout = FALSE;
1094 if (self->priv->running == FALSE) {
1095 GST_DEBUG_OBJECT (self, "Not running anymore");
1099 GST_LOG_OBJECT (self, "Checking aggregate");
1100 while (priv->send_eos && priv->running) {
1101 GstFlowReturn flow_return = GST_FLOW_OK;
1102 gboolean processed_event = FALSE;
1104 gst_aggregator_iterate_sinkpads (self, check_events, NULL);
1106 if (!gst_aggregator_wait_and_check (self, &timeout))
1109 gst_aggregator_iterate_sinkpads (self, check_events, &processed_event);
1110 if (processed_event)
1113 if (gst_pad_check_reconfigure (GST_AGGREGATOR_SRC_PAD (self))) {
1114 flow_return = gst_aggregator_update_src_caps (self);
1115 if (flow_return != GST_FLOW_OK)
1116 gst_pad_mark_reconfigure (GST_AGGREGATOR_SRC_PAD (self));
1119 if (timeout || flow_return >= GST_FLOW_OK) {
1120 GST_TRACE_OBJECT (self, "Actually aggregating!");
1121 flow_return = klass->aggregate (self, timeout);
1124 if (flow_return == GST_AGGREGATOR_FLOW_NEED_DATA)
1127 GST_OBJECT_LOCK (self);
1128 if (flow_return == GST_FLOW_FLUSHING && priv->flush_seeking) {
1129 /* We don't want to set the pads to flushing, but we want to
1130 * stop the thread, so just break here */
1131 GST_OBJECT_UNLOCK (self);
1134 GST_OBJECT_UNLOCK (self);
1136 if (flow_return == GST_FLOW_EOS || flow_return == GST_FLOW_ERROR) {
1137 gst_aggregator_push_eos (self);
1140 GST_LOG_OBJECT (self, "flow return is %s", gst_flow_get_name (flow_return));
1142 if (flow_return != GST_FLOW_OK) {
1145 GST_OBJECT_LOCK (self);
1146 for (item = GST_ELEMENT (self)->sinkpads; item; item = item->next) {
1147 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
1149 gst_aggregator_pad_set_flushing (aggpad, flow_return, TRUE);
1151 GST_OBJECT_UNLOCK (self);
1156 /* Pause the task here, the only ways to get here are:
1157 * 1) We're stopping, in which case the task is stopped anyway
1158 * 2) We got a flow error above, in which case it might take
1159 * some time to forward the flow return upstream and we
1160 * would otherwise call the task function over and over
1161 * again without doing anything
1163 gst_pad_pause_task (self->srcpad);
1167 gst_aggregator_start (GstAggregator * self)
1169 GstAggregatorClass *klass;
1172 self->priv->send_stream_start = TRUE;
1173 self->priv->send_segment = TRUE;
1174 self->priv->send_eos = TRUE;
1175 self->priv->srccaps = NULL;
1177 gst_aggregator_set_allocation (self, NULL, NULL, NULL, NULL);
1179 klass = GST_AGGREGATOR_GET_CLASS (self);
1182 result = klass->start (self);
1190 _check_pending_flush_stop (GstAggregatorPad * pad)
1195 res = (!pad->priv->pending_flush_stop && !pad->priv->pending_flush_start);
1202 gst_aggregator_stop_srcpad_task (GstAggregator * self, GstEvent * flush_start)
1204 gboolean res = TRUE;
1206 GST_INFO_OBJECT (self, "%s srcpad task",
1207 flush_start ? "Pausing" : "Stopping");
1210 self->priv->running = FALSE;
1211 SRC_BROADCAST (self);
1215 res = gst_pad_push_event (self->srcpad, flush_start);
1218 gst_pad_stop_task (self->srcpad);
1224 gst_aggregator_start_srcpad_task (GstAggregator * self)
1226 GST_INFO_OBJECT (self, "Starting srcpad task");
1228 self->priv->running = TRUE;
1229 gst_pad_start_task (GST_PAD (self->srcpad),
1230 (GstTaskFunction) gst_aggregator_aggregate_func, self, NULL);
1233 static GstFlowReturn
1234 gst_aggregator_flush (GstAggregator * self)
1236 GstFlowReturn ret = GST_FLOW_OK;
1237 GstAggregatorPrivate *priv = self->priv;
1238 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
1240 GST_DEBUG_OBJECT (self, "Flushing everything");
1241 GST_OBJECT_LOCK (self);
1242 priv->send_segment = TRUE;
1243 priv->flush_seeking = FALSE;
1244 priv->tags_changed = FALSE;
1245 GST_OBJECT_UNLOCK (self);
1247 ret = klass->flush (self);
1253 /* Called with GstAggregator's object lock held */
1256 gst_aggregator_all_flush_stop_received_locked (GstAggregator * self)
1259 GstAggregatorPad *tmppad;
1261 for (tmp = GST_ELEMENT (self)->sinkpads; tmp; tmp = tmp->next) {
1262 tmppad = (GstAggregatorPad *) tmp->data;
1264 if (_check_pending_flush_stop (tmppad) == FALSE) {
1265 GST_DEBUG_OBJECT (tmppad, "Is not last %i -- %i",
1266 tmppad->priv->pending_flush_start, tmppad->priv->pending_flush_stop);
1275 gst_aggregator_flush_start (GstAggregator * self, GstAggregatorPad * aggpad,
1278 GstAggregatorPrivate *priv = self->priv;
1279 GstAggregatorPadPrivate *padpriv = aggpad->priv;
1281 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, FALSE);
1283 PAD_FLUSH_LOCK (aggpad);
1285 if (padpriv->pending_flush_start) {
1286 GST_DEBUG_OBJECT (aggpad, "Expecting FLUSH_STOP now");
1288 padpriv->pending_flush_start = FALSE;
1289 padpriv->pending_flush_stop = TRUE;
1291 PAD_UNLOCK (aggpad);
1293 GST_OBJECT_LOCK (self);
1294 if (priv->flush_seeking) {
1295 /* If flush_seeking we forward the first FLUSH_START */
1296 if (priv->pending_flush_start) {
1297 priv->pending_flush_start = FALSE;
1298 GST_OBJECT_UNLOCK (self);
1300 GST_INFO_OBJECT (self, "Flushing, pausing srcpad task");
1301 gst_aggregator_stop_srcpad_task (self, event);
1303 GST_INFO_OBJECT (self, "Getting STREAM_LOCK while seeking");
1304 GST_PAD_STREAM_LOCK (self->srcpad);
1305 GST_LOG_OBJECT (self, "GOT STREAM_LOCK");
1308 GST_OBJECT_UNLOCK (self);
1309 gst_event_unref (event);
1312 GST_OBJECT_UNLOCK (self);
1313 gst_event_unref (event);
1315 PAD_FLUSH_UNLOCK (aggpad);
1318 /* Must be called with the the PAD_LOCK held */
1320 update_time_level (GstAggregatorPad * aggpad, gboolean head)
1323 if (GST_CLOCK_TIME_IS_VALID (aggpad->priv->head_position) &&
1324 aggpad->priv->head_segment.format == GST_FORMAT_TIME)
1325 aggpad->priv->head_time =
1326 gst_segment_to_running_time (&aggpad->priv->head_segment,
1327 GST_FORMAT_TIME, aggpad->priv->head_position);
1329 aggpad->priv->head_time = GST_CLOCK_TIME_NONE;
1331 if (!GST_CLOCK_TIME_IS_VALID (aggpad->priv->tail_time))
1332 aggpad->priv->tail_time = aggpad->priv->head_time;
1334 if (GST_CLOCK_TIME_IS_VALID (aggpad->priv->tail_position) &&
1335 aggpad->segment.format == GST_FORMAT_TIME)
1336 aggpad->priv->tail_time =
1337 gst_segment_to_running_time (&aggpad->segment,
1338 GST_FORMAT_TIME, aggpad->priv->tail_position);
1340 aggpad->priv->tail_time = aggpad->priv->head_time;
1343 if (aggpad->priv->head_time == GST_CLOCK_TIME_NONE ||
1344 aggpad->priv->tail_time == GST_CLOCK_TIME_NONE) {
1345 aggpad->priv->time_level = 0;
1349 if (aggpad->priv->tail_time > aggpad->priv->head_time)
1350 aggpad->priv->time_level = 0;
1352 aggpad->priv->time_level = aggpad->priv->head_time -
1353 aggpad->priv->tail_time;
1357 /* GstAggregator vmethods default implementations */
1359 gst_aggregator_default_sink_event (GstAggregator * self,
1360 GstAggregatorPad * aggpad, GstEvent * event)
1362 gboolean res = TRUE;
1363 GstPad *pad = GST_PAD (aggpad);
1364 GstAggregatorPrivate *priv = self->priv;
1366 switch (GST_EVENT_TYPE (event)) {
1367 case GST_EVENT_FLUSH_START:
1369 gst_aggregator_flush_start (self, aggpad, event);
1370 /* We forward only in one case: right after flush_seeking */
1374 case GST_EVENT_FLUSH_STOP:
1376 GST_DEBUG_OBJECT (aggpad, "Got FLUSH_STOP");
1378 gst_aggregator_pad_flush (aggpad, self);
1379 GST_OBJECT_LOCK (self);
1380 if (priv->flush_seeking) {
1381 g_atomic_int_set (&aggpad->priv->pending_flush_stop, FALSE);
1382 if (gst_aggregator_all_flush_stop_received_locked (self)) {
1383 GST_OBJECT_UNLOCK (self);
1384 /* That means we received FLUSH_STOP/FLUSH_STOP on
1385 * all sinkpads -- Seeking is Done... sending FLUSH_STOP */
1386 gst_aggregator_flush (self);
1387 gst_pad_push_event (self->srcpad, event);
1390 priv->send_eos = TRUE;
1391 SRC_BROADCAST (self);
1394 GST_INFO_OBJECT (self, "Releasing source pad STREAM_LOCK");
1395 GST_PAD_STREAM_UNLOCK (self->srcpad);
1396 gst_aggregator_start_srcpad_task (self);
1398 GST_OBJECT_UNLOCK (self);
1401 GST_OBJECT_UNLOCK (self);
1404 /* We never forward the event */
1409 GST_DEBUG_OBJECT (aggpad, "EOS");
1411 /* We still have a buffer, and we don't want the subclass to have to
1412 * check for it. Mark pending_eos, eos will be set when steal_buffer is
1417 if (aggpad->priv->num_buffers == 0) {
1418 aggpad->priv->eos = TRUE;
1420 aggpad->priv->pending_eos = TRUE;
1422 PAD_UNLOCK (aggpad);
1424 SRC_BROADCAST (self);
1428 case GST_EVENT_SEGMENT:
1431 GST_OBJECT_LOCK (aggpad);
1432 gst_event_copy_segment (event, &aggpad->segment);
1433 /* We've got a new segment, tail_position is now meaningless
1434 * and may interfere with the time_level calculation
1436 aggpad->priv->tail_position = GST_CLOCK_TIME_NONE;
1437 update_time_level (aggpad, FALSE);
1438 GST_OBJECT_UNLOCK (aggpad);
1439 PAD_UNLOCK (aggpad);
1441 GST_OBJECT_LOCK (self);
1442 self->priv->seqnum = gst_event_get_seqnum (event);
1443 GST_OBJECT_UNLOCK (self);
1446 case GST_EVENT_STREAM_START:
1452 GstClockTime pts, endpts;
1453 GstClockTime duration;
1456 gst_event_parse_gap (event, &pts, &duration);
1457 gapbuf = gst_buffer_new ();
1459 if (GST_CLOCK_TIME_IS_VALID (duration))
1460 endpts = pts + duration;
1462 endpts = GST_CLOCK_TIME_NONE;
1464 GST_OBJECT_LOCK (aggpad);
1465 res = gst_segment_clip (&aggpad->segment, GST_FORMAT_TIME, pts, endpts,
1467 GST_OBJECT_UNLOCK (aggpad);
1470 GST_WARNING_OBJECT (self, "GAP event outside segment, dropping");
1474 if (GST_CLOCK_TIME_IS_VALID (endpts) && GST_CLOCK_TIME_IS_VALID (pts))
1475 duration = endpts - pts;
1477 duration = GST_CLOCK_TIME_NONE;
1479 GST_BUFFER_PTS (gapbuf) = pts;
1480 GST_BUFFER_DURATION (gapbuf) = duration;
1481 GST_BUFFER_FLAG_SET (gapbuf, GST_BUFFER_FLAG_GAP);
1482 GST_BUFFER_FLAG_SET (gapbuf, GST_BUFFER_FLAG_DROPPABLE);
1484 if (gst_aggregator_pad_chain_internal (self, aggpad, gapbuf, FALSE) !=
1486 GST_WARNING_OBJECT (self, "Failed to chain gap buffer");
1496 gst_event_parse_tag (event, &tags);
1498 if (gst_tag_list_get_scope (tags) == GST_TAG_SCOPE_STREAM) {
1499 gst_aggregator_merge_tags (self, tags, GST_TAG_MERGE_REPLACE);
1500 gst_event_unref (event);
1512 GST_DEBUG_OBJECT (pad, "Forwarding event: %" GST_PTR_FORMAT, event);
1513 return gst_pad_event_default (pad, GST_OBJECT (self), event);
1516 GST_DEBUG_OBJECT (pad, "Eating event: %" GST_PTR_FORMAT, event);
1518 gst_event_unref (event);
1523 static inline gboolean
1524 gst_aggregator_stop_pad (GstAggregator * self, GstAggregatorPad * pad,
1525 gpointer unused_udata)
1527 gst_aggregator_pad_flush (pad, self);
1530 pad->priv->flow_return = GST_FLOW_FLUSHING;
1531 pad->priv->negotiated = FALSE;
1532 PAD_BROADCAST_EVENT (pad);
1539 gst_aggregator_stop (GstAggregator * agg)
1541 GstAggregatorClass *klass;
1544 gst_aggregator_reset_flow_values (agg);
1546 gst_aggregator_iterate_sinkpads (agg, gst_aggregator_stop_pad, NULL);
1548 klass = GST_AGGREGATOR_GET_CLASS (agg);
1551 result = klass->stop (agg);
1555 agg->priv->has_peer_latency = FALSE;
1556 agg->priv->peer_latency_live = FALSE;
1557 agg->priv->peer_latency_min = agg->priv->peer_latency_max = FALSE;
1559 if (agg->priv->tags)
1560 gst_tag_list_unref (agg->priv->tags);
1561 agg->priv->tags = NULL;
1563 gst_aggregator_set_allocation (agg, NULL, NULL, NULL, NULL);
1568 /* GstElement vmethods implementations */
1569 static GstStateChangeReturn
1570 gst_aggregator_change_state (GstElement * element, GstStateChange transition)
1572 GstStateChangeReturn ret;
1573 GstAggregator *self = GST_AGGREGATOR (element);
1575 switch (transition) {
1576 case GST_STATE_CHANGE_READY_TO_PAUSED:
1577 if (!gst_aggregator_start (self))
1585 GST_ELEMENT_CLASS (aggregator_parent_class)->change_state (element,
1586 transition)) == GST_STATE_CHANGE_FAILURE)
1590 switch (transition) {
1591 case GST_STATE_CHANGE_PAUSED_TO_READY:
1592 if (!gst_aggregator_stop (self)) {
1593 /* What to do in this case? Error out? */
1594 GST_ERROR_OBJECT (self, "Subclass failed to stop.");
1606 GST_ERROR_OBJECT (element, "parent failed state change");
1611 GST_ERROR_OBJECT (element, "Subclass failed to start");
1612 return GST_STATE_CHANGE_FAILURE;
1617 gst_aggregator_release_pad (GstElement * element, GstPad * pad)
1619 GstAggregator *self = GST_AGGREGATOR (element);
1620 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1622 GST_INFO_OBJECT (pad, "Removing pad");
1625 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, TRUE);
1626 gst_element_remove_pad (element, pad);
1628 self->priv->has_peer_latency = FALSE;
1629 SRC_BROADCAST (self);
1633 static GstAggregatorPad *
1634 gst_aggregator_default_create_new_pad (GstAggregator * self,
1635 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
1637 GstAggregatorPad *agg_pad;
1638 GstAggregatorPrivate *priv = self->priv;
1642 if (templ->direction != GST_PAD_SINK)
1645 if (templ->presence != GST_PAD_REQUEST)
1648 GST_OBJECT_LOCK (self);
1649 if (req_name == NULL || strlen (req_name) < 6
1650 || !g_str_has_prefix (req_name, "sink_")) {
1651 /* no name given when requesting the pad, use next available int */
1652 serial = ++priv->max_padserial;
1654 /* parse serial number from requested padname */
1655 serial = g_ascii_strtoull (&req_name[5], NULL, 10);
1656 if (serial > priv->max_padserial)
1657 priv->max_padserial = serial;
1660 name = g_strdup_printf ("sink_%u", serial);
1661 agg_pad = g_object_new (GST_AGGREGATOR_GET_CLASS (self)->sinkpads_type,
1662 "name", name, "direction", GST_PAD_SINK, "template", templ, NULL);
1665 GST_OBJECT_UNLOCK (self);
1672 GST_WARNING_OBJECT (self, "request new pad that is not a SINK pad");
1677 GST_WARNING_OBJECT (self, "request new pad that is not a REQUEST pad");
1683 gst_aggregator_request_new_pad (GstElement * element,
1684 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
1686 GstAggregator *self;
1687 GstAggregatorPad *agg_pad;
1688 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (element);
1689 GstAggregatorPrivate *priv = GST_AGGREGATOR (element)->priv;
1691 self = GST_AGGREGATOR (element);
1693 agg_pad = klass->create_new_pad (self, templ, req_name, caps);
1695 GST_ERROR_OBJECT (element, "Couldn't create new pad");
1699 GST_DEBUG_OBJECT (element, "Adding pad %s", GST_PAD_NAME (agg_pad));
1702 gst_pad_set_active (GST_PAD (agg_pad), TRUE);
1704 /* add the pad to the element */
1705 gst_element_add_pad (element, GST_PAD (agg_pad));
1707 return GST_PAD (agg_pad);
1710 /* Must be called with SRC_LOCK held */
1713 gst_aggregator_query_latency_unlocked (GstAggregator * self, GstQuery * query)
1715 gboolean query_ret, live;
1716 GstClockTime our_latency, min, max;
1718 query_ret = gst_pad_query_default (self->srcpad, GST_OBJECT (self), query);
1721 GST_WARNING_OBJECT (self, "Latency query failed");
1725 gst_query_parse_latency (query, &live, &min, &max);
1727 our_latency = self->priv->latency;
1729 if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (min))) {
1730 GST_ERROR_OBJECT (self, "Invalid minimum latency %" GST_TIME_FORMAT
1731 ". Please file a bug at " PACKAGE_BUGREPORT ".", GST_TIME_ARGS (min));
1735 if (min > max && GST_CLOCK_TIME_IS_VALID (max)) {
1736 GST_ELEMENT_WARNING (self, CORE, CLOCK, (NULL),
1737 ("Impossible to configure latency: max %" GST_TIME_FORMAT " < min %"
1738 GST_TIME_FORMAT ". Add queues or other buffering elements.",
1739 GST_TIME_ARGS (max), GST_TIME_ARGS (min)));
1743 self->priv->peer_latency_live = live;
1744 self->priv->peer_latency_min = min;
1745 self->priv->peer_latency_max = max;
1746 self->priv->has_peer_latency = TRUE;
1750 min += self->priv->sub_latency_min;
1751 if (GST_CLOCK_TIME_IS_VALID (self->priv->sub_latency_max)
1752 && GST_CLOCK_TIME_IS_VALID (max))
1753 max += self->priv->sub_latency_max + our_latency;
1755 max = GST_CLOCK_TIME_NONE;
1757 SRC_BROADCAST (self);
1759 GST_DEBUG_OBJECT (self, "configured latency live:%s min:%" G_GINT64_FORMAT
1760 " max:%" G_GINT64_FORMAT, live ? "true" : "false", min, max);
1762 gst_query_set_latency (query, live, min, max);
1768 * MUST be called with the src_lock held.
1770 * See gst_aggregator_get_latency() for doc
1773 gst_aggregator_get_latency_unlocked (GstAggregator * self)
1775 GstClockTime latency;
1777 g_return_val_if_fail (GST_IS_AGGREGATOR (self), 0);
1779 if (!self->priv->has_peer_latency) {
1780 GstQuery *query = gst_query_new_latency ();
1783 ret = gst_aggregator_query_latency_unlocked (self, query);
1784 gst_query_unref (query);
1786 return GST_CLOCK_TIME_NONE;
1789 if (!self->priv->has_peer_latency || !self->priv->peer_latency_live)
1790 return GST_CLOCK_TIME_NONE;
1792 /* latency_min is never GST_CLOCK_TIME_NONE by construction */
1793 latency = self->priv->peer_latency_min;
1796 latency += self->priv->latency;
1797 latency += self->priv->sub_latency_min;
1803 * gst_aggregator_get_latency:
1804 * @self: a #GstAggregator
1806 * Retrieves the latency values reported by @self in response to the latency
1807 * query, or %GST_CLOCK_TIME_NONE if there is not live source connected and the element
1808 * will not wait for the clock.
1810 * Typically only called by subclasses.
1812 * Returns: The latency or %GST_CLOCK_TIME_NONE if the element does not sync
1815 gst_aggregator_get_latency (GstAggregator * self)
1820 ret = gst_aggregator_get_latency_unlocked (self);
1827 gst_aggregator_send_event (GstElement * element, GstEvent * event)
1829 GstAggregator *self = GST_AGGREGATOR (element);
1831 GST_STATE_LOCK (element);
1832 if (GST_EVENT_TYPE (event) == GST_EVENT_SEEK &&
1833 GST_STATE (element) < GST_STATE_PAUSED) {
1837 GstSeekType start_type, stop_type;
1840 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1841 &start, &stop_type, &stop);
1843 GST_OBJECT_LOCK (self);
1844 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
1845 stop_type, stop, NULL);
1846 self->priv->seqnum = gst_event_get_seqnum (event);
1847 self->priv->first_buffer = FALSE;
1848 GST_OBJECT_UNLOCK (self);
1850 GST_DEBUG_OBJECT (element, "Storing segment %" GST_PTR_FORMAT, event);
1852 GST_STATE_UNLOCK (element);
1855 return GST_ELEMENT_CLASS (aggregator_parent_class)->send_event (element,
1860 gst_aggregator_default_src_query (GstAggregator * self, GstQuery * query)
1862 gboolean res = TRUE;
1864 switch (GST_QUERY_TYPE (query)) {
1865 case GST_QUERY_SEEKING:
1869 /* don't pass it along as some (file)sink might claim it does
1870 * whereas with a collectpads in between that will not likely work */
1871 gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
1872 gst_query_set_seeking (query, format, FALSE, 0, -1);
1877 case GST_QUERY_LATENCY:
1879 res = gst_aggregator_query_latency_unlocked (self, query);
1883 return gst_pad_query_default (self->srcpad, GST_OBJECT (self), query);
1890 gst_aggregator_event_forward_func (GstPad * pad, gpointer user_data)
1892 EventData *evdata = user_data;
1893 gboolean ret = TRUE;
1894 GstPad *peer = gst_pad_get_peer (pad);
1895 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1898 if (evdata->only_to_active_pads && aggpad->priv->first_buffer) {
1899 GST_DEBUG_OBJECT (pad, "not sending event to inactive pad");
1902 ret = gst_pad_send_event (peer, gst_event_ref (evdata->event));
1903 GST_DEBUG_OBJECT (pad, "return of event push is %d", ret);
1904 gst_object_unref (peer);
1909 if (GST_EVENT_TYPE (evdata->event) == GST_EVENT_SEEK) {
1910 GstQuery *seeking = gst_query_new_seeking (GST_FORMAT_TIME);
1912 GST_DEBUG_OBJECT (pad, "Event %" GST_PTR_FORMAT " failed", evdata->event);
1914 if (gst_pad_query (peer, seeking)) {
1917 gst_query_parse_seeking (seeking, NULL, &seekable, NULL, NULL);
1919 if (seekable == FALSE) {
1920 GST_INFO_OBJECT (pad,
1921 "Source not seekable, We failed but it does not matter!");
1926 GST_ERROR_OBJECT (pad, "Query seeking FAILED");
1929 gst_query_unref (seeking);
1932 if (evdata->flush) {
1934 aggpad->priv->pending_flush_start = FALSE;
1935 aggpad->priv->pending_flush_stop = FALSE;
1936 PAD_UNLOCK (aggpad);
1939 evdata->one_actually_seeked = TRUE;
1942 evdata->result &= ret;
1944 /* Always send to all pads */
1949 gst_aggregator_forward_event_to_all_sinkpads (GstAggregator * self,
1950 GstEvent * event, gboolean flush, gboolean only_to_active_pads)
1954 evdata.event = event;
1955 evdata.result = TRUE;
1956 evdata.flush = flush;
1957 evdata.one_actually_seeked = FALSE;
1958 evdata.only_to_active_pads = only_to_active_pads;
1960 /* We first need to set all pads as flushing in a first pass
1961 * as flush_start flush_stop is sometimes sent synchronously
1962 * while we send the seek event */
1966 GST_OBJECT_LOCK (self);
1967 for (l = GST_ELEMENT_CAST (self)->sinkpads; l != NULL; l = l->next) {
1968 GstAggregatorPad *pad = l->data;
1971 pad->priv->pending_flush_start = TRUE;
1972 pad->priv->pending_flush_stop = FALSE;
1975 GST_OBJECT_UNLOCK (self);
1978 gst_pad_forward (self->srcpad, gst_aggregator_event_forward_func, &evdata);
1980 gst_event_unref (event);
1986 gst_aggregator_do_seek (GstAggregator * self, GstEvent * event)
1991 GstSeekType start_type, stop_type;
1995 GstAggregatorPrivate *priv = self->priv;
1997 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1998 &start, &stop_type, &stop);
2000 GST_INFO_OBJECT (self, "starting SEEK");
2002 flush = flags & GST_SEEK_FLAG_FLUSH;
2004 GST_OBJECT_LOCK (self);
2006 priv->pending_flush_start = TRUE;
2007 priv->flush_seeking = TRUE;
2010 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
2011 stop_type, stop, NULL);
2013 /* Seeking sets a position */
2014 self->priv->first_buffer = FALSE;
2015 GST_OBJECT_UNLOCK (self);
2017 /* forward the seek upstream */
2019 gst_aggregator_forward_event_to_all_sinkpads (self, event, flush, FALSE);
2022 if (!evdata.result || !evdata.one_actually_seeked) {
2023 GST_OBJECT_LOCK (self);
2024 priv->flush_seeking = FALSE;
2025 priv->pending_flush_start = FALSE;
2026 GST_OBJECT_UNLOCK (self);
2029 GST_INFO_OBJECT (self, "seek done, result: %d", evdata.result);
2031 return evdata.result;
2035 gst_aggregator_default_src_event (GstAggregator * self, GstEvent * event)
2038 gboolean res = TRUE;
2040 switch (GST_EVENT_TYPE (event)) {
2041 case GST_EVENT_SEEK:
2043 gst_event_ref (event);
2044 res = gst_aggregator_do_seek (self, event);
2045 gst_event_unref (event);
2049 case GST_EVENT_NAVIGATION:
2051 /* navigation is rather pointless. */
2053 gst_event_unref (event);
2062 /* Don't forward QOS events to pads that had no active buffer yet. Otherwise
2063 * they will receive a QOS event that has earliest_time=0 (because we can't
2064 * have negative timestamps), and consider their buffer as too late */
2066 gst_aggregator_forward_event_to_all_sinkpads (self, event, FALSE,
2067 GST_EVENT_TYPE (event) == GST_EVENT_QOS);
2068 res = evdata.result;
2075 gst_aggregator_src_pad_event_func (GstPad * pad, GstObject * parent,
2078 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2080 return klass->src_event (GST_AGGREGATOR (parent), event);
2084 gst_aggregator_src_pad_query_func (GstPad * pad, GstObject * parent,
2087 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2089 return klass->src_query (GST_AGGREGATOR (parent), query);
2093 gst_aggregator_src_pad_activate_mode_func (GstPad * pad,
2094 GstObject * parent, GstPadMode mode, gboolean active)
2096 GstAggregator *self = GST_AGGREGATOR (parent);
2097 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2099 if (klass->src_activate) {
2100 if (klass->src_activate (self, mode, active) == FALSE) {
2105 if (active == TRUE) {
2107 case GST_PAD_MODE_PUSH:
2109 GST_INFO_OBJECT (pad, "Activating pad!");
2110 gst_aggregator_start_srcpad_task (self);
2115 GST_ERROR_OBJECT (pad, "Only supported mode is PUSH");
2122 GST_INFO_OBJECT (self, "Deactivating srcpad");
2123 gst_aggregator_stop_srcpad_task (self, FALSE);
2129 gst_aggregator_default_sink_query (GstAggregator * self,
2130 GstAggregatorPad * aggpad, GstQuery * query)
2132 GstPad *pad = GST_PAD (aggpad);
2134 if (GST_QUERY_TYPE (query) == GST_QUERY_ALLOCATION) {
2135 GstQuery *decide_query = NULL;
2136 GstAggregatorClass *agg_class;
2139 GST_OBJECT_LOCK (self);
2141 if (G_UNLIKELY (!aggpad->priv->negotiated)) {
2142 GST_DEBUG_OBJECT (self,
2143 "not negotiated yet, can't answer ALLOCATION query");
2144 PAD_UNLOCK (aggpad);
2145 GST_OBJECT_UNLOCK (self);
2150 if ((decide_query = self->priv->allocation_query))
2151 gst_query_ref (decide_query);
2152 PAD_UNLOCK (aggpad);
2153 GST_OBJECT_UNLOCK (self);
2155 GST_DEBUG_OBJECT (self,
2156 "calling propose allocation with query %" GST_PTR_FORMAT, decide_query);
2158 agg_class = GST_AGGREGATOR_GET_CLASS (self);
2160 /* pass the query to the propose_allocation vmethod if any */
2161 if (agg_class->propose_allocation)
2162 ret = agg_class->propose_allocation (self, aggpad, decide_query, query);
2167 gst_query_unref (decide_query);
2169 GST_DEBUG_OBJECT (self, "ALLOCATION ret %d, %" GST_PTR_FORMAT, ret, query);
2173 return gst_pad_query_default (pad, GST_OBJECT (self), query);
2177 gst_aggregator_finalize (GObject * object)
2179 GstAggregator *self = (GstAggregator *) object;
2181 g_mutex_clear (&self->priv->src_lock);
2182 g_cond_clear (&self->priv->src_cond);
2184 G_OBJECT_CLASS (aggregator_parent_class)->finalize (object);
2188 * gst_aggregator_set_latency_property:
2189 * @agg: a #GstAggregator
2190 * @latency: the new latency value (in nanoseconds).
2192 * Sets the new latency value to @latency. This value is used to limit the
2193 * amount of time a pad waits for data to appear before considering the pad
2197 gst_aggregator_set_latency_property (GstAggregator * self, gint64 latency)
2201 g_return_if_fail (GST_IS_AGGREGATOR (self));
2202 g_return_if_fail (GST_CLOCK_TIME_IS_VALID (latency));
2205 changed = (self->priv->latency != latency);
2210 GST_OBJECT_LOCK (self);
2211 /* First lock all the pads */
2212 for (item = GST_ELEMENT_CAST (self)->sinkpads; item; item = item->next) {
2213 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
2217 self->priv->latency = latency;
2219 SRC_BROADCAST (self);
2221 /* Now wake up the pads */
2222 for (item = GST_ELEMENT_CAST (self)->sinkpads; item; item = item->next) {
2223 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
2224 PAD_BROADCAST_EVENT (aggpad);
2225 PAD_UNLOCK (aggpad);
2227 GST_OBJECT_UNLOCK (self);
2233 gst_element_post_message (GST_ELEMENT_CAST (self),
2234 gst_message_new_latency (GST_OBJECT_CAST (self)));
2238 * gst_aggregator_get_latency_property:
2239 * @agg: a #GstAggregator
2241 * Gets the latency value. See gst_aggregator_set_latency for
2244 * Returns: The time in nanoseconds to wait for data to arrive on a sink pad
2245 * before a pad is deemed unresponsive. A value of -1 means an
2249 gst_aggregator_get_latency_property (GstAggregator * agg)
2253 g_return_val_if_fail (GST_IS_AGGREGATOR (agg), -1);
2255 GST_OBJECT_LOCK (agg);
2256 res = agg->priv->latency;
2257 GST_OBJECT_UNLOCK (agg);
2263 gst_aggregator_set_property (GObject * object, guint prop_id,
2264 const GValue * value, GParamSpec * pspec)
2266 GstAggregator *agg = GST_AGGREGATOR (object);
2270 gst_aggregator_set_latency_property (agg, g_value_get_int64 (value));
2272 case PROP_START_TIME_SELECTION:
2273 agg->priv->start_time_selection = g_value_get_enum (value);
2275 case PROP_START_TIME:
2276 agg->priv->start_time = g_value_get_uint64 (value);
2279 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2285 gst_aggregator_get_property (GObject * object, guint prop_id,
2286 GValue * value, GParamSpec * pspec)
2288 GstAggregator *agg = GST_AGGREGATOR (object);
2292 g_value_set_int64 (value, gst_aggregator_get_latency_property (agg));
2294 case PROP_START_TIME_SELECTION:
2295 g_value_set_enum (value, agg->priv->start_time_selection);
2297 case PROP_START_TIME:
2298 g_value_set_uint64 (value, agg->priv->start_time);
2301 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2306 /* GObject vmethods implementations */
2308 gst_aggregator_class_init (GstAggregatorClass * klass)
2310 GObjectClass *gobject_class = (GObjectClass *) klass;
2311 GstElementClass *gstelement_class = (GstElementClass *) klass;
2313 aggregator_parent_class = g_type_class_peek_parent (klass);
2314 g_type_class_add_private (klass, sizeof (GstAggregatorPrivate));
2316 GST_DEBUG_CATEGORY_INIT (aggregator_debug, "aggregator",
2317 GST_DEBUG_FG_MAGENTA, "GstAggregator");
2319 klass->sinkpads_type = GST_TYPE_AGGREGATOR_PAD;
2321 klass->sink_event = gst_aggregator_default_sink_event;
2322 klass->sink_query = gst_aggregator_default_sink_query;
2324 klass->src_event = gst_aggregator_default_src_event;
2325 klass->src_query = gst_aggregator_default_src_query;
2327 klass->create_new_pad = gst_aggregator_default_create_new_pad;
2328 klass->update_src_caps = gst_aggregator_default_update_src_caps;
2329 klass->fixate_src_caps = gst_aggregator_default_fixate_src_caps;
2330 klass->negotiated_src_caps = gst_aggregator_default_negotiated_src_caps;
2332 gstelement_class->request_new_pad =
2333 GST_DEBUG_FUNCPTR (gst_aggregator_request_new_pad);
2334 gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_aggregator_send_event);
2335 gstelement_class->release_pad =
2336 GST_DEBUG_FUNCPTR (gst_aggregator_release_pad);
2337 gstelement_class->change_state =
2338 GST_DEBUG_FUNCPTR (gst_aggregator_change_state);
2340 gobject_class->set_property = gst_aggregator_set_property;
2341 gobject_class->get_property = gst_aggregator_get_property;
2342 gobject_class->finalize = gst_aggregator_finalize;
2344 g_object_class_install_property (gobject_class, PROP_LATENCY,
2345 g_param_spec_int64 ("latency", "Buffer latency",
2346 "Additional latency in live mode to allow upstream "
2347 "to take longer to produce buffers for the current "
2348 "position (in nanoseconds)", 0,
2349 (G_MAXLONG == G_MAXINT64) ? G_MAXINT64 : (G_MAXLONG * GST_SECOND - 1),
2350 DEFAULT_LATENCY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2352 g_object_class_install_property (gobject_class, PROP_START_TIME_SELECTION,
2353 g_param_spec_enum ("start-time-selection", "Start Time Selection",
2354 "Decides which start time is output",
2355 gst_aggregator_start_time_selection_get_type (),
2356 DEFAULT_START_TIME_SELECTION,
2357 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2359 g_object_class_install_property (gobject_class, PROP_START_TIME,
2360 g_param_spec_uint64 ("start-time", "Start Time",
2361 "Start time to use if start-time-selection=set", 0,
2363 DEFAULT_START_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2365 GST_DEBUG_REGISTER_FUNCPTR (gst_aggregator_stop_pad);
2369 gst_aggregator_init (GstAggregator * self, GstAggregatorClass * klass)
2371 GstPadTemplate *pad_template;
2372 GstAggregatorPrivate *priv;
2374 g_return_if_fail (klass->aggregate != NULL);
2377 G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_AGGREGATOR,
2378 GstAggregatorPrivate);
2383 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "src");
2384 g_return_if_fail (pad_template != NULL);
2386 priv->max_padserial = -1;
2387 priv->tags_changed = FALSE;
2389 self->priv->peer_latency_live = FALSE;
2390 self->priv->peer_latency_min = self->priv->sub_latency_min = 0;
2391 self->priv->peer_latency_max = self->priv->sub_latency_max = 0;
2392 self->priv->has_peer_latency = FALSE;
2393 gst_aggregator_reset_flow_values (self);
2395 self->srcpad = gst_pad_new_from_template (pad_template, "src");
2397 gst_pad_set_event_function (self->srcpad,
2398 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_event_func));
2399 gst_pad_set_query_function (self->srcpad,
2400 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_query_func));
2401 gst_pad_set_activatemode_function (self->srcpad,
2402 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_activate_mode_func));
2404 gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
2406 self->priv->latency = DEFAULT_LATENCY;
2407 self->priv->start_time_selection = DEFAULT_START_TIME_SELECTION;
2408 self->priv->start_time = DEFAULT_START_TIME;
2410 g_mutex_init (&self->priv->src_lock);
2411 g_cond_init (&self->priv->src_cond);
2414 /* we can't use G_DEFINE_ABSTRACT_TYPE because we need the klass in the _init
2415 * method to get to the padtemplates */
2417 gst_aggregator_get_type (void)
2419 static volatile gsize type = 0;
2421 if (g_once_init_enter (&type)) {
2423 static const GTypeInfo info = {
2424 sizeof (GstAggregatorClass),
2427 (GClassInitFunc) gst_aggregator_class_init,
2430 sizeof (GstAggregator),
2432 (GInstanceInitFunc) gst_aggregator_init,
2435 _type = g_type_register_static (GST_TYPE_ELEMENT,
2436 "GstAggregator", &info, G_TYPE_FLAG_ABSTRACT);
2437 g_once_init_leave (&type, _type);
2442 /* Must be called with SRC lock and PAD lock held */
2444 gst_aggregator_pad_has_space (GstAggregator * self, GstAggregatorPad * aggpad)
2446 /* Empty queue always has space */
2447 if (aggpad->priv->num_buffers == 0 && aggpad->priv->clipped_buffer == NULL)
2450 /* We also want at least two buffers, one is being processed and one is ready
2451 * for the next iteration when we operate in live mode. */
2452 if (self->priv->peer_latency_live && aggpad->priv->num_buffers < 2)
2455 /* zero latency, if there is a buffer, it's full */
2456 if (self->priv->latency == 0)
2459 /* Allow no more buffers than the latency */
2460 return (aggpad->priv->time_level <= self->priv->latency);
2463 /* Must be called with the PAD_LOCK held */
2465 apply_buffer (GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head)
2467 GstClockTime timestamp;
2469 if (GST_BUFFER_DTS_IS_VALID (buffer))
2470 timestamp = GST_BUFFER_DTS (buffer);
2472 timestamp = GST_BUFFER_PTS (buffer);
2474 if (timestamp == GST_CLOCK_TIME_NONE) {
2476 timestamp = aggpad->priv->head_position;
2478 timestamp = aggpad->priv->tail_position;
2482 if (GST_BUFFER_DURATION_IS_VALID (buffer))
2483 timestamp += GST_BUFFER_DURATION (buffer);
2486 aggpad->priv->head_position = timestamp;
2488 aggpad->priv->tail_position = timestamp;
2490 update_time_level (aggpad, head);
2493 static GstFlowReturn
2494 gst_aggregator_pad_chain_internal (GstAggregator * self,
2495 GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head)
2497 GstFlowReturn flow_return;
2498 GstClockTime buf_pts;
2500 GST_DEBUG_OBJECT (aggpad, "Start chaining a buffer %" GST_PTR_FORMAT, buffer);
2502 PAD_FLUSH_LOCK (aggpad);
2505 flow_return = aggpad->priv->flow_return;
2506 if (flow_return != GST_FLOW_OK)
2509 if (aggpad->priv->pending_eos == TRUE)
2512 PAD_UNLOCK (aggpad);
2514 buf_pts = GST_BUFFER_PTS (buffer);
2518 GST_OBJECT_LOCK (self);
2521 if (aggpad->priv->first_buffer) {
2522 self->priv->has_peer_latency = FALSE;
2523 aggpad->priv->first_buffer = FALSE;
2526 if (gst_aggregator_pad_has_space (self, aggpad)
2527 && aggpad->priv->flow_return == GST_FLOW_OK) {
2529 g_queue_push_head (&aggpad->priv->buffers, buffer);
2531 g_queue_push_tail (&aggpad->priv->buffers, buffer);
2532 apply_buffer (aggpad, buffer, head);
2533 aggpad->priv->num_buffers++;
2535 SRC_BROADCAST (self);
2539 flow_return = aggpad->priv->flow_return;
2540 if (flow_return != GST_FLOW_OK) {
2541 GST_OBJECT_UNLOCK (self);
2545 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
2546 GST_OBJECT_UNLOCK (self);
2548 PAD_WAIT_EVENT (aggpad);
2550 PAD_UNLOCK (aggpad);
2553 if (self->priv->first_buffer) {
2554 GstClockTime start_time;
2556 switch (self->priv->start_time_selection) {
2557 case GST_AGGREGATOR_START_TIME_SELECTION_ZERO:
2561 case GST_AGGREGATOR_START_TIME_SELECTION_FIRST:
2562 GST_OBJECT_LOCK (aggpad);
2563 if (aggpad->priv->head_segment.format == GST_FORMAT_TIME) {
2564 start_time = buf_pts;
2565 if (start_time != -1) {
2566 start_time = MAX (start_time, aggpad->priv->head_segment.start);
2568 gst_segment_to_running_time (&aggpad->priv->head_segment,
2569 GST_FORMAT_TIME, start_time);
2573 GST_WARNING_OBJECT (aggpad,
2574 "Ignoring request of selecting the first start time "
2575 "as the segment is a %s segment instead of a time segment",
2576 gst_format_get_name (aggpad->segment.format));
2578 GST_OBJECT_UNLOCK (aggpad);
2580 case GST_AGGREGATOR_START_TIME_SELECTION_SET:
2581 start_time = self->priv->start_time;
2582 if (start_time == -1)
2587 if (start_time != -1) {
2588 if (self->segment.position == -1)
2589 self->segment.position = start_time;
2591 self->segment.position = MIN (start_time, self->segment.position);
2593 GST_DEBUG_OBJECT (self, "Selecting start time %" GST_TIME_FORMAT,
2594 GST_TIME_ARGS (start_time));
2598 PAD_UNLOCK (aggpad);
2599 GST_OBJECT_UNLOCK (self);
2602 PAD_FLUSH_UNLOCK (aggpad);
2604 GST_DEBUG_OBJECT (aggpad, "Done chaining");
2609 PAD_UNLOCK (aggpad);
2610 PAD_FLUSH_UNLOCK (aggpad);
2612 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping buffer",
2613 gst_flow_get_name (flow_return));
2615 gst_buffer_unref (buffer);
2620 PAD_UNLOCK (aggpad);
2621 PAD_FLUSH_UNLOCK (aggpad);
2623 gst_buffer_unref (buffer);
2624 GST_DEBUG_OBJECT (aggpad, "We are EOS already...");
2626 return GST_FLOW_EOS;
2629 static GstFlowReturn
2630 gst_aggregator_pad_chain (GstPad * pad, GstObject * object, GstBuffer * buffer)
2632 return gst_aggregator_pad_chain_internal (GST_AGGREGATOR_CAST (object),
2633 GST_AGGREGATOR_PAD_CAST (pad), buffer, TRUE);
2637 gst_aggregator_pad_query_func (GstPad * pad, GstObject * parent,
2640 GstAggregator *self = GST_AGGREGATOR (parent);
2641 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2642 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2644 if (GST_QUERY_IS_SERIALIZED (query)) {
2646 gboolean ret = FALSE;
2651 if (aggpad->priv->flow_return != GST_FLOW_OK) {
2656 g_queue_push_head (&aggpad->priv->buffers, query);
2657 SRC_BROADCAST (self);
2660 while (!gst_aggregator_pad_queue_is_empty (aggpad)
2661 && aggpad->priv->flow_return == GST_FLOW_OK) {
2662 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
2663 PAD_WAIT_EVENT (aggpad);
2666 s = gst_query_writable_structure (query);
2667 if (gst_structure_get_boolean (s, "gst-aggregator-retval", &ret))
2668 gst_structure_remove_field (s, "gst-aggregator-retval");
2670 g_queue_remove (&aggpad->priv->buffers, query);
2672 if (aggpad->priv->flow_return != GST_FLOW_OK)
2675 PAD_UNLOCK (aggpad);
2680 return klass->sink_query (self, aggpad, query);
2683 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping query",
2684 gst_flow_get_name (aggpad->priv->flow_return));
2685 PAD_UNLOCK (aggpad);
2690 static GstFlowReturn
2691 gst_aggregator_pad_event_func (GstPad * pad, GstObject * parent,
2694 GstFlowReturn ret = GST_FLOW_OK;
2695 GstAggregator *self = GST_AGGREGATOR (parent);
2696 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2697 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2699 if (GST_EVENT_IS_SERIALIZED (event) && GST_EVENT_TYPE (event) != GST_EVENT_EOS
2700 /* && GST_EVENT_TYPE (event) != GST_EVENT_SEGMENT_DONE */ ) {
2704 if (aggpad->priv->flow_return != GST_FLOW_OK
2705 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
2706 ret = aggpad->priv->flow_return;
2710 if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
2711 GST_OBJECT_LOCK (aggpad);
2712 gst_event_copy_segment (event, &aggpad->priv->head_segment);
2713 aggpad->priv->head_position = aggpad->priv->head_segment.position;
2714 update_time_level (aggpad, TRUE);
2715 GST_OBJECT_UNLOCK (aggpad);
2718 if (GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
2719 GST_DEBUG_OBJECT (aggpad, "Store event in queue: %" GST_PTR_FORMAT,
2721 g_queue_push_head (&aggpad->priv->buffers, event);
2723 SRC_BROADCAST (self);
2725 PAD_UNLOCK (aggpad);
2730 if (!klass->sink_event (self, aggpad, event)) {
2731 /* Copied from GstPad to convert boolean to a GstFlowReturn in
2732 * the event handling func */
2733 ret = GST_FLOW_ERROR;
2740 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping event",
2741 gst_flow_get_name (aggpad->priv->flow_return));
2742 PAD_UNLOCK (aggpad);
2744 if (GST_EVENT_IS_STICKY (event))
2745 gst_pad_store_sticky_event (pad, event);
2746 gst_event_unref (event);
2752 gst_aggregator_pad_activate_mode_func (GstPad * pad,
2753 GstObject * parent, GstPadMode mode, gboolean active)
2755 GstAggregator *self = GST_AGGREGATOR (parent);
2756 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2758 if (active == FALSE) {
2760 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, TRUE);
2761 SRC_BROADCAST (self);
2765 aggpad->priv->flow_return = GST_FLOW_OK;
2766 PAD_BROADCAST_EVENT (aggpad);
2767 PAD_UNLOCK (aggpad);
2773 /***********************************
2774 * GstAggregatorPad implementation *
2775 ************************************/
2776 G_DEFINE_TYPE (GstAggregatorPad, gst_aggregator_pad, GST_TYPE_PAD);
2779 gst_aggregator_pad_constructed (GObject * object)
2781 GstPad *pad = GST_PAD (object);
2783 gst_pad_set_chain_function (pad,
2784 GST_DEBUG_FUNCPTR (gst_aggregator_pad_chain));
2785 gst_pad_set_event_full_function_full (pad,
2786 GST_DEBUG_FUNCPTR (gst_aggregator_pad_event_func), NULL, NULL);
2787 gst_pad_set_query_function (pad,
2788 GST_DEBUG_FUNCPTR (gst_aggregator_pad_query_func));
2789 gst_pad_set_activatemode_function (pad,
2790 GST_DEBUG_FUNCPTR (gst_aggregator_pad_activate_mode_func));
2794 gst_aggregator_pad_finalize (GObject * object)
2796 GstAggregatorPad *pad = (GstAggregatorPad *) object;
2798 g_cond_clear (&pad->priv->event_cond);
2799 g_mutex_clear (&pad->priv->flush_lock);
2800 g_mutex_clear (&pad->priv->lock);
2802 G_OBJECT_CLASS (gst_aggregator_pad_parent_class)->finalize (object);
2806 gst_aggregator_pad_dispose (GObject * object)
2808 GstAggregatorPad *pad = (GstAggregatorPad *) object;
2810 gst_aggregator_pad_set_flushing (pad, GST_FLOW_FLUSHING, TRUE);
2812 G_OBJECT_CLASS (gst_aggregator_pad_parent_class)->dispose (object);
2816 gst_aggregator_pad_class_init (GstAggregatorPadClass * klass)
2818 GObjectClass *gobject_class = (GObjectClass *) klass;
2820 g_type_class_add_private (klass, sizeof (GstAggregatorPadPrivate));
2822 gobject_class->constructed = gst_aggregator_pad_constructed;
2823 gobject_class->finalize = gst_aggregator_pad_finalize;
2824 gobject_class->dispose = gst_aggregator_pad_dispose;
2828 gst_aggregator_pad_init (GstAggregatorPad * pad)
2831 G_TYPE_INSTANCE_GET_PRIVATE (pad, GST_TYPE_AGGREGATOR_PAD,
2832 GstAggregatorPadPrivate);
2834 g_queue_init (&pad->priv->buffers);
2835 g_cond_init (&pad->priv->event_cond);
2837 g_mutex_init (&pad->priv->flush_lock);
2838 g_mutex_init (&pad->priv->lock);
2840 gst_aggregator_pad_reset_unlocked (pad);
2841 pad->priv->negotiated = FALSE;
2844 /* Must be called with the PAD_LOCK held */
2846 gst_aggregator_pad_buffer_consumed (GstAggregatorPad * pad)
2848 pad->priv->num_buffers--;
2849 GST_TRACE_OBJECT (pad, "Consuming buffer");
2850 if (gst_aggregator_pad_queue_is_empty (pad) && pad->priv->pending_eos) {
2851 pad->priv->pending_eos = FALSE;
2852 pad->priv->eos = TRUE;
2854 PAD_BROADCAST_EVENT (pad);
2857 /* Must be called with the PAD_LOCK held */
2859 gst_aggregator_pad_clip_buffer_unlocked (GstAggregatorPad * pad)
2861 GstAggregator *self = NULL;
2862 GstAggregatorClass *aggclass = NULL;
2863 GstBuffer *buffer = NULL;
2865 while (pad->priv->clipped_buffer == NULL &&
2866 GST_IS_BUFFER (g_queue_peek_tail (&pad->priv->buffers))) {
2867 buffer = g_queue_pop_tail (&pad->priv->buffers);
2869 apply_buffer (pad, buffer, FALSE);
2871 /* We only take the parent here so that it's not taken if the buffer is
2872 * already clipped or if the queue is empty.
2875 self = GST_AGGREGATOR (gst_pad_get_parent_element (GST_PAD (pad)));
2877 gst_buffer_unref (buffer);
2881 aggclass = GST_AGGREGATOR_GET_CLASS (self);
2884 if (aggclass->clip) {
2885 GST_TRACE_OBJECT (pad, "Clipping: %" GST_PTR_FORMAT, buffer);
2887 buffer = aggclass->clip (self, pad, buffer);
2889 if (buffer == NULL) {
2890 gst_aggregator_pad_buffer_consumed (pad);
2891 GST_TRACE_OBJECT (pad, "Clipping consumed the buffer");
2895 pad->priv->clipped_buffer = buffer;
2899 gst_object_unref (self);
2903 * gst_aggregator_pad_steal_buffer:
2904 * @pad: the pad to get buffer from
2906 * Steal the ref to the buffer currently queued in @pad.
2908 * Returns: (transfer full): The buffer in @pad or NULL if no buffer was
2909 * queued. You should unref the buffer after usage.
2912 gst_aggregator_pad_steal_buffer (GstAggregatorPad * pad)
2918 gst_aggregator_pad_clip_buffer_unlocked (pad);
2920 buffer = pad->priv->clipped_buffer;
2921 pad->priv->clipped_buffer = NULL;
2924 gst_aggregator_pad_buffer_consumed (pad);
2925 GST_DEBUG_OBJECT (pad, "Consumed: %" GST_PTR_FORMAT, buffer);
2934 * gst_aggregator_pad_drop_buffer:
2935 * @pad: the pad where to drop any pending buffer
2937 * Drop the buffer currently queued in @pad.
2939 * Returns: TRUE if there was a buffer queued in @pad, or FALSE if not.
2942 gst_aggregator_pad_drop_buffer (GstAggregatorPad * pad)
2946 buf = gst_aggregator_pad_steal_buffer (pad);
2951 gst_buffer_unref (buf);
2956 * gst_aggregator_pad_get_buffer:
2957 * @pad: the pad to get buffer from
2959 * Returns: (transfer full): A reference to the buffer in @pad or
2960 * NULL if no buffer was queued. You should unref the buffer after
2964 gst_aggregator_pad_get_buffer (GstAggregatorPad * pad)
2970 gst_aggregator_pad_clip_buffer_unlocked (pad);
2972 if (pad->priv->clipped_buffer) {
2973 buffer = gst_buffer_ref (pad->priv->clipped_buffer);
2983 gst_aggregator_pad_is_eos (GstAggregatorPad * pad)
2988 is_eos = pad->priv->eos;
2995 * gst_aggregator_merge_tags:
2996 * @self: a #GstAggregator
2997 * @tags: a #GstTagList to merge
2998 * @mode: the #GstTagMergeMode to use
3000 * Adds tags to so-called pending tags, which will be processed
3001 * before pushing out data downstream.
3003 * Note that this is provided for convenience, and the subclass is
3004 * not required to use this and can still do tag handling on its own.
3009 gst_aggregator_merge_tags (GstAggregator * self,
3010 const GstTagList * tags, GstTagMergeMode mode)
3014 g_return_if_fail (GST_IS_AGGREGATOR (self));
3015 g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
3017 /* FIXME Check if we can use OBJECT lock here! */
3018 GST_OBJECT_LOCK (self);
3020 GST_DEBUG_OBJECT (self, "merging tags %" GST_PTR_FORMAT, tags);
3021 otags = self->priv->tags;
3022 self->priv->tags = gst_tag_list_merge (self->priv->tags, tags, mode);
3024 gst_tag_list_unref (otags);
3025 self->priv->tags_changed = TRUE;
3026 GST_OBJECT_UNLOCK (self);
3030 * gst_aggregator_set_latency:
3031 * @self: a #GstAggregator
3032 * @min_latency: minimum latency
3033 * @max_latency: maximum latency
3035 * Lets #GstAggregator sub-classes tell the baseclass what their internal
3036 * latency is. Will also post a LATENCY message on the bus so the pipeline
3037 * can reconfigure its global latency.
3040 gst_aggregator_set_latency (GstAggregator * self,
3041 GstClockTime min_latency, GstClockTime max_latency)
3043 gboolean changed = FALSE;
3045 g_return_if_fail (GST_IS_AGGREGATOR (self));
3046 g_return_if_fail (GST_CLOCK_TIME_IS_VALID (min_latency));
3047 g_return_if_fail (max_latency >= min_latency);
3050 if (self->priv->sub_latency_min != min_latency) {
3051 self->priv->sub_latency_min = min_latency;
3054 if (self->priv->sub_latency_max != max_latency) {
3055 self->priv->sub_latency_max = max_latency;
3060 SRC_BROADCAST (self);
3064 gst_element_post_message (GST_ELEMENT_CAST (self),
3065 gst_message_new_latency (GST_OBJECT_CAST (self)));
3070 * gst_aggregator_get_buffer_pool:
3071 * @self: a #GstAggregator
3073 * Returns: (transfer full): the instance of the #GstBufferPool used
3074 * by @trans; free it after use it
3077 gst_aggregator_get_buffer_pool (GstAggregator * self)
3079 GstBufferPool *pool;
3081 g_return_val_if_fail (GST_IS_AGGREGATOR (self), NULL);
3083 GST_OBJECT_LOCK (self);
3084 pool = self->priv->pool;
3086 gst_object_ref (pool);
3087 GST_OBJECT_UNLOCK (self);
3093 * gst_aggregator_get_allocator:
3094 * @self: a #GstAggregator
3095 * @allocator: (out) (allow-none) (transfer full): the #GstAllocator
3097 * @params: (out) (allow-none) (transfer full): the
3098 * #GstAllocationParams of @allocator
3100 * Lets #GstAggregator sub-classes get the memory @allocator
3101 * acquired by the base class and its @params.
3103 * Unref the @allocator after use it.
3106 gst_aggregator_get_allocator (GstAggregator * self,
3107 GstAllocator ** allocator, GstAllocationParams * params)
3109 g_return_if_fail (GST_IS_AGGREGATOR (self));
3112 *allocator = self->priv->allocator ?
3113 gst_object_ref (self->priv->allocator) : NULL;
3116 *params = self->priv->allocation_params;